202364829 zte umts radio parameter

UMTS Radio Parameter

i

Contents

1 Cell and common signal channel establishment parameters.................................................................. 1

2 Cell selection and parameter re-selection ................................................................................................ 9

3 Random access parameter....................................................................................................................... 21

4 UE call establishment parameter............................................................................................................ 31

5 Paging parameter..................................................................................................................................... 39

6 Power control parameter......................................................................................................................... 45

6.1 Basic principle of internal loop power control................................................................................ 45

6.2 Basic principle of external loop power control ............................................................................... 58

7 Control parameter switch........................................................................................................................ 67

7.1 Basic principle of intra-frequency switch ....................................................................................... 67

7.2 Basic principle of inter-frequency switch ....................................................................................... 80

7.3 Basic principle of intersystem switch.............................................................................................. 90

1

1 Cell and common signal channel establishment parameters

Normal cell operation is premise for a UMTS system to guarantee normal network

operation while premise of normal cell operation is successful cell and common signal

channel establishment as well as broadcasting communication parameters to network

side of UE through system messages.

Above signaling process is shown in following figure:

Key factors to indicate a cell include configuration of frequency point, primary

scrambling code, total power and common physical signal channel.

In which: Common physical signal channels which shall be configured are as follows:

Pilot channel (PCPICH): Used as reference basis of other signal channels and

signal measurement.

Primary synchronous channel (PSCH): Used for time slot synchronization when

searching for the cell.

Auxiliary synchronous channel (SSCH): To define frame synchronization and

main scrambling code when searching for the cell.


2

Broadcasting channel (PCCPCH): Used to broadcast system messages.

Auxiliary common control physical channel (SCCPCH)：Used to bear FACH or

PCH transmission channel messages.

Random access channel (PRACH): Used for subscriber’s random access; Relevant

parameters are introduced in random access process Chapter.

Access indicator channel (AICH): Downlinkindicator channel which is used with

PRACH channel together; AICH channel parameters are introduced in random

access process Chapter.

Paging indicator channel (PICH): Used for paging indication; Paging channel

parameters are introduced in paging Chapter.

Central Frequency of the Carrier Frequency of the Uplink Channel (UUARFCN)

3GPP Name UARFCN (Nupper)

3GPP Reference TS 25.331

Field Name Uuarfcn

Description

This parameter indicates the upper limit of the Band of a UTRAN

FDD controlled by the local PLMN.

When a UE returns to the idle state from the RRC connection state,

the UE selects and resides in a cell. UTRAN carries this parameter in

the RRC CONNECTION RELEASE message. This parameter

indicates the possible transmit Band of the surrounding cell. This

helps the UE to speed up cell search.

Description of data item of radio parameter message

GUI Element Name Upper limit of FDD UMTS frequency point

Value Range

Band 1: 10562..10838

Band 2: 9662..9938, 412, 437, 462, 487, 512, 537, 562,

587, 612, 637, 662, 687

Band 3: 1162.. 1513

Band 5: 4357… 4458, 1007, 1012, 1032, 1037, 1062, 1087

Band 6: 4387 …4413, 1037, 1062

Band 8: 2937..3088

Default Value [10838,9938]

Scope RNC

Function -

Recommended

Configuration -

Chapter 1 Cell and common signal channel establishment parameters

3

Central Frequency of the Carrier Frequency of the Downlink Channel

(DUARFCN)

3GPP Name UARFCN (Nlow)


Field Name Luarfcn [8]

Description

The parameter is to instruct lower limit of a certain UTRAN

FDD frequency scope under PLMN control.

UE will select a cell when returning from RRC connection

status to idle state. Utran has this parameter in RRC

CONNECTION RELEASE message to instruct possible

transmitting frequency scope around the cell so that UE can

search for the cell quickly.

Description of data

item of radio

parameter message

GUI Element Name Lower limit of FDD UMTS frequency point

Value Range

Band 1: 10562..10838

Band 2: 9662..9938,412, 437, 462, 487, 512, 537, 562, 587,

612, 637, 662, 687

Band 3: 1162.. 1513

Band 5: 4357… 4458,1007, 1012, 1032, 1037, 1062, 1087

Band 6: 4387 …4413,1037, 1062

Band 8: 2937..3088

Default Value [10562, 9662]

Scope RNC

Function -

Recommended

Configuration -

Cell Maximum Transmission Power

3GPP Name Maximum Transmission Power


Field Name MAXDlTxPwr

Description This parameter indicates the maximum transmission power

allowed by all downlink physical channels of a cell.


GUI Element

Name Cell Maximum Transmission Power


4

3GPP Name Maximum Transmission Power

Value Range OMCR: (0.0..50.0)dBm，step 0.1dBm

RNC: D=P*10,0..500

Default Value 43dBm

Scope UTRAN Cell

Function -

Recommended

Configuration

The parameter value depends on the scenario defined by the cell

coverage attribute. The maximum transmission power is related

to the cell coverage range and should be adjusted according to

the coverage attribute of the cell. The principle of adjustment is:

Typically, the pilot frequency covers 10%, and the Ec/Io at the

edges of the pilot frequency should be maintained at about

-12dB.

Cell Primary Scrambling Code

3GPP Name Primary Scrambling Code

3GPP Reference

TS 25.331

TS 25.423

TS25.433

Field Name PrimScraCode

Description

Cell primary scrambling codes distinguish between cells. The

UTRAN system has a total of 512 available primary

scrambling codes.


GUI Element Name Cell Primary Scrambling Code

Value Range 0..511-

Default Value -

Scope UTRAN Cell

Function -

Recommended

Configuration

Since there are a total of 512 available primary scrambling

codes, these codes follow spatial multiplexing. Basically, the

principle is to ensure that the primary scrambling codes are

different between neighboring cells, and the space between the

cells with the same primary scrambling code should be as large

as possible. Typically, you should plan the primary scrambling

codes during network planning.

P-CPICH Power


5

3GPP Name Primary CPICH Tx Power; Primary CPICH power; Primary

CPICH Power

3GPP Reference

TS 25.331: “RRC Protocol Specification”

TS 25.433: “UTRAN Iub Interface NBAP Signaling”

TS 25.423: "UTRAN Iur interface RNSAP signalling"

Field Name PcpichPwr

Description

This parameter indicates the transmit power of the PCPICH. It

is an absolute value. The cell uses this power to transmit the

PCPICH.


GUI Element Name P-CPICH Power

Value Range (-10.0..50.0) dBm step 0.1dBm

Default Value 33dBm

Scope UTRAN Cell

Function Power Control

Recommended

Configuration

The parameter value is related to the scenario defined by the

cell coverage attribute and should be adjusted according to the

coverage attribute of the cell. Typically, the rational value of

Ec/Io of the PCPICH at the edges of the cell is about -12dB. If

the power is high, it is a waste of power. If the power is low,

QoS cannot be guaranteed in case that a subscriber is at the

edge of the cell.

Primary SCH Power

3GPP Name Primary SCH Power

3GPP Reference TS 25.433: “UTRAN Iub Interface NBAP Signalling”

Field Name PschPwr

Description

This parameter indicates the transmit power of the PSCH. It is

a relative value (dB) of the transmit power of the PCPICH of

the local cell.


GUI Element Name PSCH Power

Value Range (-35..+15) dB step 0.1dB

Default Value -3dB

Scope UTRAN Cell


Recommended

Configuration

The transmit power of the PSCH should ensure that the

subscribers at the edges of the cell correctly detect the PSCH.


6

3GPP Name Primary SCH Power

In network optimization, you can adjust the power according

to the actual cell search success status of the subscribers.

Usually, because the transmit power of the PSCH is associated

with the PCPICH, the default configuration can ensure

successful synchronization only if the power of the PCPICH is

appropriate.

Secondary SCH Power

3GPP Name Secondary SCH Power


Field Name SschPwr

Description

This parameter indicates the transmit power of the SSCH. It is

a relative value (dB) of the transmit power of PCPICH of the

local cell.


GUI Element Name SSCH power

Value Range (-35..+15) dB step 0.1dB

Default Value -4dB

Scope UTRAN Cell


Recommended

Configuration

The recommended configuration is the same as the transmit

power of the PSCH.

S-CCPCH Time Slot Format

3GPP Name Secondary CCPCH Slot Format


Field Name SlotFmt

Description

This parameter indicates the format of timeslot used by the

SCCPCH. The SCCPCH uses a total of 18 formats of

timeslots.


GUI Element Name SCCPCH Slot Format

Value Range 0..17

Default Value

SCCPCH to bear PCH: 4

SCCPCH to bear R99 FACH: 8

SCCPCH to bear MCCH: 6

Scope UTRAN Cell


7

3GPP Name Secondary CCPCH Slot Format

Function -

Recommended

Configuration

The timeslot format of the SCCPCH determines the bearer rate

over SCCPCH.

S-CCPCH TFCI Field Power Offset

3GPP Name PO1


Field Name PO1

Description

This parameter indicates the offset (relative value) of the

transmit powers of the SCCPCH in the TFCI field and the data

field. The offset varies according to the data bit rate.


GUI Element Name S-CCPCH TFCI Field Power Offset

Value Range (0..6) dB step 0.25 dB

Default Value 3dB

Scope UTRAN Cell


Recommended

Configuration

This parameter is associated with the SF of the SCCPCH that

bears the FACH. Typically, when the SF changes, the gain over

the channel changes as well. Therefore, to maintain the bit

detection performance of the TFCI field of the SCCPCH, the

parameter should also be adjusted. The principle is: The

smaller the SF of the SCCPCH, the smaller the parameter

value.

S-CCPCH Pilot Field Power Offset

3GPP Name PO3


Field Name PO3

Description

This parameter indicates the offset (relative value) of the transmit

powers of the SCCPCH in the PILOT field and the data field. The

offset varies according to the data bit rate.


GUI Element

Name S-CCPCH Pilot Field Power Offset

Value Range (0.6) dB step 0.25 dB

Default Value 3dB


8

3GPP Name PO3

Scope UTRAN Cell


Recommended

Configuration

The recommended configuration is the same as SCCPCH TFCI

Field Power Offset.

Maximum FACH Power

3GPP Name Max FACH Power


Field Name MaxFachPwr

Description

This parameter indicates the maximum transmit power (relative

value based on the transmit power of the PCPICH) of the FACH

mapped to the SCCPCH.


GUI Element Name Maximum FACH transmitting power

Value Range (-35..15)dB step 0.1 dB

Default Value -1dB

Scope UTRAN Cell


Recommended

Configuration

This parameter is associated with the data rate over the FACH.

The larger the data rate over the FACH, the larger the required

power.

9

2 Cell selection and parameter re-selection

Execute PLMN selection and cell selection process in sequence after UE bootstrap.

The cell shall be selected for staying and registration to network side after selecting a

suitable cell. UE will select the cell again after staying to a certain serving cell with UE

motion and variation of signal channel quality.

PLMN selection process:

PLMN selection standard is that CPICH RSCP is more than or equal to -95dBm. UE

will read PLMN of cell which has searched for the strongest signal. PLMN also can be

regarded as selection access PLMN if failing to meet above standards but PLMN mark

can be decoded.

Cell selection process:

Cell with the strongest signal shall be regarded as the initial access cell.

S rule definitions of cell selection standards are as follows:

for FDD cells: Srxlev > 0 AND Squal > 0

for TDD cells: Srxlev > 0

In which:

Squal = Qqualmeas – Qqualmin

Srxlev = Qrxlevmeas - Qrxlevmin - Pcompensation

Squal Cell selection quality value (dB)

It is only suitable to FDD cell.

Srxlev RX level value (dB) for cell selection

Qqualmeas

Measured cell quality value: CPICH Ec/N0 refers to quality of

signals received by FDD cell and it is only suitable to FDD

cell.


10

Qrxlevmeas

RX level value of measured cell: Received signal of FDD cell

is CPICH RSCP (dB) and that of TDD cell is P-CCPCH RSCP (dBm) and that of GSM cell is RXLEV（dBm）.

Qqualmin It refers to the minimum quality value required for cell ant it is

only suitable to FDD cell.

Qrxlevmin The minimum RX level (dBm) required for cell;

P compensation Max (UE_TXPWR_MAX_RACH – P_MAX, 0)

UE_TXPWR_MAX_

RACH

The maximum available TX power level of UE (which is read

from system messages) during RACH cell access;

P_MAX The maximum RF output power of UE，(dBm)

Cell re-selection process

UE will select cell again after staying to the cell. Cell re-selection includes

measurement execution and determination of UE.

Following introduction is not suitable to HCS cell.

Measurement rules:

UE will regard Squal（FDD cell） as Sx in following rules:

UE does not need to execute inter-frequency measurement if Sx exceeds Sintrasearch.

UE will execute inter-frequency measurement if Sx is less than or equal to

Sintrasearch.

UE will carry on intra- frequency measurement if Sintrasearch has not been configured.

UE does not need to execute inter-frequency measurement if Sx exceeds Sintrasearch.

UE will execute inter-frequency measurement if Sx is less than or equal to

Sintrasearch.

Chapter 2 Cell selection and parameter re-selection

11

UE will carry on inter- frequency measurement if Sintrasearch has not been configured.

UE does not need to measure cells with different radio measurement techniques if Sx

exceeds SsearchRAT m.

UE will measure other RAT m cells if Sx is less than or equal to SsearchRATm.

UE will measure other RAT m cells if SsearchRAT m has not been configured.

Cell re-selection determination rules are as follows:

Following cell re-selection standards are used for intra-frequency, inter-frequency and

inter-RAT cells:

R rules for cell array standards are as follows:

Rs = Qmeas,s + Qhysts

Rn = Qmeas,n - Qoffsets,n - TOn * (1 – Ln)

In which:

In which: Tn is a timer and it shall be started up if signal quality of adjacent cell is

better than sum of signal quality of serving cell and relative offset（Qoffset1s,n or

Qoffset2s,n） of serving cell and adjacent cell. That is, adjacent cell shall be deducted

by offset if signals of adjacent cell fluctuate so that it is difficult to be regarded as

target cell for re-selection.

All cells which meet S standard shall be founded out firstly then arrayed according to

above R rules and cell with the largest R shall be regarded as target cell for re-selection

during cell re-selection determination.

UE will execute cell re-selection process if re-selection interval meets cell re-selection

standard and UE has stayed in current serving cell for more than 1 second.

Minimum demand level of cell quality (Qqualmin)


12

3GPP Name Qqualmin

3GPP Reference TS 25.304: “UE Procedures in Idle Mode”


Field Name QQualMin

Description

This parameter indicates the minimum cell quality level that

satisfies cell selection and reselection conditions. When the

measured value is CPICH Ec/No, the quality value of the

measured cell must be greater than Qqualmin before it can

meet the condition for cell selection.


GUI Element Name Minimum demand level of cell quality

Value Range (-24..0) dB step 1dB

Default Value -18 dB

Scope UTRAN Cell

Function Cell Selection/Reselection

Recommended

Configuration

This parameter is the foundation for determining the S rule of

the cell. Typically, you should use the default value. However,

in the scenario of a highway, because the distance between

stations is large, the number of cells is small with a large

distance, and the UE moves fast, the original cell will therefore

features a power signal quality. In this case, the UE fails to

reselect the new cell. Therefore, you can lower Qqualmin and

Qrxlevmin to make the UE complete the cell reselection as

early as possible. The principle also applies to the corners of

crowded cells.

Minimum Cell Receiving Electrical Level Threshold (Qrxlevmin)

3GPP Name Qrxlevmin



Field Name QRxLevMin

Description

This parameter indicates the minimum cell receiving level that

satisfies the cell selection and reselection conditions. When the

measured value is CPICH RSCP, the receiving level of the

measured cell must be greater than Qrxlevmin before it can

meet the condition for cell selection.


GUI Element Name Minimum cell receiving electrical level threshold

Value Range (-115..-25) dBm step 2dBm


13

3GPP Name Qrxlevmin

Default Value -115 dBm

Scope UTRAN Cell


Recommended

Configuration The recommended configuration is the same as Qqualmin.

Measurement Quantity for Cell Selection and Reselection

3GPP Name Cell selection and reselection quality measure

3GPP Reference TS 25.331: “RRC Protocol Specification”

TS 25.304: “UE Procedures in Idle Mode”

Field Name QualMeas

Description This parameter indicates the measure for cell selection and

reselection.


GUI Element Name Cell re-selection measurement quantity

Value Range 1: CPICH Ec/No

2: CPICH RSCP

Default Value CPICH Ec/No

Scope UTRAN Cell


Recommended

Configuration

This parameter indicates the measure as determination

standard for cell selection and reselection.

This parameter is determined in view of the co-channel

interference. When you configure a co-channel neighboring

cell for the cell, the co-channel interference is larger. To better

reflect the signal quality, you should use CPICH Ec/No as the

determination standard of the measure. However, when you

configure an inter-frequency or inter-system neighboring cell,

there is no co-channel interference. In this case, it is more

appropriate to use CPICH RSCP as the determination standard

for the measure.

In a typical networking, there are a lot of co-channel

neighboring cells; therefore, you should select CPICH Ec/No

as the default value.

Synchronization frequency Measurement Trigger Threshold for Cell Re-selection

(Sintrasearch)


14

3GPP Name Sintrasearch



Field Name SIntraSearch

Description

This parameter indicates the intra-frequency measurement trigger for cell

reselection. The UE uses this parameter to determine whether to execute

intra-frequency measurement. In case HCS is not used, if the quality of the

serving cell is greater than Sintrasearch, intra-frequency measurement is not

executed. If the quality of the serving cell is smaller than or equal to

Sintrasearch or Sintrasearch is not configured, the UE executes intra-frequency

measurement. For details, see TS 25.304.


GUI Element Name Synchronization frequency measurement trigger threshold for cell re-selection

Value Range (0..20 ) dB Step 2dB

Default Value 14dB

Scope UTRAN Cell


Recommended

Configuration

The parameter is determined depending on the situation whether the specific

scenario expects the reselection of the intra-frequency cell as soon as possible.

A smaller parameter value is more likely to trigger the measurement of the

intra-frequency cell. A larger parameter value is not easy to trigger the

measurement. The recommended configuration is based on the universal

scenarios. Therefore, you should follow the recommended configuration.

Inter-frequency Measurement Trigger Threshold for Cell Re-selection

(Sintersearch)

3GPP Name Sintersearch



Field Name SInterSearch

Description

This parameter indicates the inter-frequency measurement trigger

for cell reselection. The UE uses this parameter to determine

whether to execute inter-frequency measurement. In case HCS is

not used, if the quality of the serving cell is greater than

SInterSearch, inter-frequency measurement is not executed. If the

quality of the serving cell is smaller than or equal to Sintrasearch

or SInterSearch is not configured, the UE executes

inter-frequency measurement. For details, see TS 25.304.



15

3GPP Name Sintersearch

GUI Element

Name

Inter-frequency measurement trigger threshold for cell

re-selection


Default Value 10dB

Scope UTRAN Cell


Recommended

Configuration

The parameter is determined depending on the situation whether

the specific scenario expects the reselection of the

inter-frequency cell as soon as possible. A smaller parameter

value is more likely to trigger the measurement of the

intra-frequency cell. A larger parameter value is not easy to

trigger the measurement.

Inter-system Measurement Trigger Threshold for Cell Re-selection (Ssearch,

RAT)

3GPP Name Ssearch,RAT



Field Name SSearchRat

Description

This parameter indicates the triggers Ssearch, RAT for inter-system

measurement for cell reselection. The UE uses these triggers to

determine whether to execute inter-system measurement. In case

HCS is not used, if the quality of the serving cell is greater than

Ssearch, RAT, inter-system measurement is not executed. If the

quality of the serving cell is smaller than or equal to Ssearch, RAT

or Ssearch, RAT is not configured, the UE executes inter-system

measurement. For details, see TS 25.304.


GUI Element

Name Inter-system measurement trigger threshold for cell re-selection


Default Value 6dB

Scope UTRAN Cell


Recommended

Configuration

The parameter is determined depending on the situation whether

the specific scenario expects the reselection of the inter-system cell

as soon as possible. A smaller parameter value is more likely to

trigger the measurement of the intra-frequency cell. A larger


16

3GPP Name Ssearch,RAT

parameter value is not easy to trigger the measurement.

Re-selection Lag 1 of Serving Cell (Qhyst1s)

3GPP Name Qhyst1s

3GPP

Reference



Field Name QHyst1S

Description

This parameter indicates the hysteresis parameter for determining

FDD cell reselection in case that the measure is CPICH RSCP. In the

R rule of cell reselection, the R value of the cell is equal to the

measured value plus the hysteresis parameter. For details, see TS

25.304.


GUI Element

Name Re-selection lag 1 of serving cell

Value Range (0..40) dB step2 dB

Default Value 10dB

Scope UTRAN Cell


Recommended

Configuration

The parameter is determined depending on the situation whether the

specific scenario expects the reselection of the inter-frequency cell as

soon as possible. A larger parameter value indicates that the UE is

more expected to reside in the current serving cell. A smaller

parameter value is more likely to trigger the measurement of the

intra-frequency cell. However, a larger value may result in poor

signal quality of the local cell whereas good quality of the

neighboring cell. In this case, cell reselection still will not be

triggered.

Re-selection Lag 2 of Serving Cell (Qhyst2s)

3GPP Name Qhyst2s



Field Name QHyst2S

Description

This parameter indicates the hysteresis parameter for determining

FDD cell reselection in case that the measure is CPICH Ec/No. In

the R rule of cell reselection, the R value of the serving cell is

equal to the measured value plus the delay parameter. For details,


17

3GPP Name Qhyst2s

see TS 25.304.


GUI Element Name Re-selection lag 2 of serving cell

Value Range (0..40) dB step 2 dB

Default Value 2 dB

Scope UTRAN Cell


Recommended Configuration The recommended configuration is the same as QHyst1S.

Timer Duration for Cell Re-selection (Treselections)

3GPP Name Treselections



Field Name T reselection

Description

This parameter indicates the timer for cell reselection. For a

serving cell, a new cell must prolong the Treselections

duration according to the R sorting rule before it can be

selected as the new serving cell.


GUI Element Name Timer duration for cell re-selection

Value Range (0..31) s step 1s

Default Value 1s

Scope UTRAN Cell


Recommended

Configuration

The purpose of Treselection is to avoid mutual reselection

between two cells. In a scenario where a cell features dense

signal with fast changes, you need to increase the difficulty for

reselection, for example, increase the timer, to avoid frequent

reselection. This helps to cut down Treselections.

Quality Offset 1 (Qoffset1s,n in SIB11) of Corresponding Serving Cell and

Adjacent Cell in SIB11

3GPP Name Qoffset1s,n



Field Name Qoffset1SNSib11


18


Description

This parameter indicates the offset between the serving cell and the

neighboring cell in the event that the measure is CPICH RSCP. It is

required to sort cells in cell reselection. This parameter is broadcasted

to the UE in SIB11.


GUI Element

Name

Quality offset 1 of corresponding serving cell and adjacent cell in

SIB11

Value Range OMCR: (-50..50) dB

RNC: D=P+50, 0..100

Default Value 0dB

Scope UTRAN Neighboring Cell, GSM Neighboring Cell


Recommended

Configuration

This parameter indicates the offset between the serving cell and the

neighboring cell in the event that the measure is CPICH RSCP. Cell

reselection follows the R rule, and the R value of the neighboring cell

is equal to the measured value subtracting the neighboring quality

offset. The parameter is determined depending on the situation

whether the specific scenario expects the reselection of the

inter-frequency cell as soon as possible. A larger parameter value

indicates that the neighboring cell is more impossible to be reselected

as the destination cell, and therefore cell reselection seldom happens.

A smaller parameter value is more likely to trigger cell reselection.

However, a larger value may result in poor quality of the local cell

and good quality of the neighboring cell. In this case, cell reselection

still will not happen.

In co-networking of UMTS and GSM, continuous coverage is

expected inside the UMTS network. Only when the UMTS network

covers edges, cell reselection from UMTS to GSM is required.

Therefore, in the suburbs with dense signals, you can increase

Qrxlevmin in SIB11 and Qoffset1-s, n in SIB11 (neighboring cell) to

improve the difficulty for cell reselection. As to the edges of the

UMTS network, especially a highway, the UE moves fast. In this

case, the signal of the UMTS cell quickly decreases. In case that the

UE goes into the GSM network coverage area but cell reselection still

does not happen. Therefore, you can increase Ssearch, RAT and

reduce Qrxlevmin in SIB11 and Qoffset1-s, n in SIB11 (neighboring

cell) to help the UE complete cell reselection as early as possible.

Quality Offset 2(Qoffset2s, n in SIB11) of Corresponding Serving Cell and

Adjacent Cell in SIB11


19




Field Name Qoffset2SN Sib11

Description

This parameter indicates the offset between the serving cell and

the neighboring cell in the event that the measure is CPICH

Ec/No. It is required to sort cells in cell reselection. This

parameter is broadcasted to the UE in SIB11.


GUI Element Name Quality offset 2 of corresponding serving cell and adjacent cell

in SIB11

Value Range OMCR: (-50..50) dB

RNC: D=P+50,0..100

Default Value 0dB

Scope UTRAN Neighboring Cell


Recommended

Configuration

The recommended configuration is the same as

Qoffset1SNSib11.

21

3 Random access parameter

Registration process shall be initiated after UE selecting a cell for staying. A random

access process shall be initiated firstly according to system broadcasting messages.

In addition, random access process shall be executed for uplinkinteraction between UE

and network side firstly once UE is under idle, CELL_PCH/URA_PCH or

CELL_FACH status.

Frame structure of random access channel:

Message partPreamble

4096 chips10 ms (one radio frame)

Preamble Preamble

Message partPreamble

4096 chips 20 ms (two radio frames)

Preamble Preamble

Prefix of frame structure consists of signature code and scrambling.

Timing relationship between PRACH and AICH

One access slot

τp-a

τp-mτp-p

Pre-amble

Pre-amble Message part

Acq.Ind.AICH access

slots RX at UE

PRACH accessslots TX at UE


22

In which:

- When AICH_Transmission_Timing is 0:

τp-p,min = 15360 chips (3 access slots)

τp-a = 7680 chips

τp-m = 15360 chips (3 access slots)

- When AICH_Transmission_Timing is 1:

τp-p,min = 20480 chips (4 access slots)

τp-a = 12800 chips

τp-m = 20480 chips (4 access slots)

Random access includes MAC layer and physical layer.

Physical channels used for random access are represented by scrambling and signature.

Access process of physical layer

Effective uplinkaccess time slot gained from access time slot collection：An effective

access time slot shall be selected randomly among corresponding access time slot

collection for effective RACH sub-channel Number which is required for

corresponding ASC.

A signature shall be selected randomly among available signatures which correspond to

selected ASC.

Setting prefix retransmission counter is Preamble Retrans Max.

Setting initial transmitting power of prefix

Setting prefix transmitting power is equal to the maximum transmitting power if

calculated prefix transmitting power exceeds the maximum permissible

uplinktransmitting power. Setting prefix transmitting power is equal to the minimum

transmitting power if calculated prefix transmitting power is less than the maximum

permissible uplinktransmitting power. Then selected signature, uplinkaccess time slot

and prefix transmitting power shall be connected to prefix.

If UE has not received yes/no reply of selected signature （AI ≠ +1 nor –1）of AICH

during Downlinkaccess time slot which is defined after uplinkaccess time slot:

An effective access time slot shall be selected randomly among effective RACH

Chapter 3 Random access parameter

23

sub-channel Number which corresponds to selected ASC.

An available signature shall be selected randomly among available signatures

which correspond to selected ASC.

Prefix transmitting power shall be increased by step length of P　 0 = Power Ramp

Step [dB]

Prefix retransmission counter shall be deducted by 1.

Turn to Step 5 for re-execution if prefix retransmission counter exceeds 0 or

physical layer (L1) of UE will report status (of “No ack on AICH”) to MAC and

exit physical random access process.

UE physical layer will report (of “No ack on AICH received”) to MAC and exit

physical random access process if UE has received negative reply for selected

signature of AICH during definition period after uplinkaccess time slot.

UE will send random access messages during the 3rd or 4th uplinkaccess time slot after

sending the prefix time slot finally after receiving positive reply for selected signature

of AICH during definition period after uplinkaccess time slot. The 3rd or 4th

uplinkaccess time slot depends on MAC parameter of AICH transmission timing.

Physical layer L1 of UE will report status (of "RACH message transmitted") to MAC

and exit physical random access process.

Access process of MAC layer

MAC layer will generate random quantity and send probability (Pi) for comparison if

data shall be sent. Sending is not allowed unless it exceeds Pi. MAC layer will wait

form next TTI for re-sending if sending is not allowed previously.

Random access process request of physical layer will be initiated to L1 if sending is

allowed.

Physical layer will feedback to MAC layer for notice of successful access to RRC layer

if prefix sent by physical layer has been confirmed by AICH signal channel.

L1 layer will notify MAC layer of access failure if prefix sending times of physical

layer is equal to the maximum prefix retransmission times but reply of AICH channel

has not been received. MAC layer will send reply again for next TTI.

MAC layer will start up revolution timer (TBO1) after physical layer receives negative


24

reply of AICH and notice to MAC layer. It can be sent again after timing. TBO1 can be

set to NBO1 times of interval of 10ms； 0 ≤ NBO1min ≤ NBO1 ≤ NBO1max；

NBO1min can be equal to NBO1max when expecting a fixed delay.

MAC layer will notify RRC RACH of sending failure if re-trial times exceed the

maximum preamble cycle times of RACH.

Available Signature

3GPP Name Available Signature ; Preamble Signatures


TS 25.433: “UTRAN Iub Interface NBAP Signalling”

Field Name Signature

Description

This parameter indicates all available signatures for PRACH

access. The 16 bits represents 16 signatures. If the value of a bit

is 1, it indicates that the corresponding signature is available.

One signature number corresponds to one SF=16 channelized

coded number.


GUI Element Name Available signature

Value Range

Bitstring(16)

Bit0: sig0

..

Bit15: sig15

Bit of 1 refers to available signature.

Default Value 1

Scope UTRAN Cell

Function -

Recommended Configuration

PRACH signatures distinguish between subscribers. To avoid

the same sending preamble for multiple subscribers, multiple

available signatures are defined in the protocol. A subscriber can

select a random signature before sending. The more signatures

you configure, the smaller probability a conflict occurs.

PRACH Available Subchannel Number

3GPP Name Available Subchannel Number; RACH Subchannel Numbers




25

3GPP Name Available Subchannel Number; RACH Subchannel Numbers

Field Name AvailSubChanNum

Description

This parameter indicates available subchannel numbers of the

PRACH. The subchannel number defines the available access

timeslot for the PRACH. Each bit indicates whether the

subchannel number is available. Each subchannel number can

correspond to multiple access timeslots.


GUI Element Name PRACH available subchannel number

Value Range

Bitstring (12)

bit0: subch0

..

bit11: subch11

Bit of 1 refers to available subchannel

Default Value 4095

Scope UTRAN Cell

Function

Recommended Configuration An available subchannel number offers an chance for PRACH

access. More subchannel numbers means more access chances.

PRACH Available SF

3GPP Name Available SF


Field Name AvailableSF

Description

This parameter indicates the minimum available spreading

factor (SF) for the PRACH (namely, the parameter restricts the

maximum transmission rate of the PRACH).


GUI Element Name PRACH available spreading factor

Value Range (32,64,128,256)

Default Value 64

Scope UTRAN Cell

Function -

Recommended Configuration The PRACH available SF reflects the uploading rate of the

PRACH. The larger the rate, the smaller the SF.

PRACH Preamble Scrambling Code

3GPP Name Preamble scrambling code number; Scrambling Code Number


26

3GPP Name Preamble scrambling code number; Scrambling Code Number



Field Name PreamScraCode

Description

This parameter indicates the preamble scrambling code number for

the PRACH. The scrambling code number used by the PRACH is

associated with the downlink primary scrambling code, and a

maximum of 16 scrambling codes are available. This parameter

distinguishes between PRACH physical channels.


GUI Element Name PRACH preamble scrambling code

Value Range 0..15

Default Value 0 (PRACH shall be increased by 1 if one value is added)

Scope UTRAN Cell

Function -


The PRACH preamble scrambling code number distinguishes

between physical channels. If multiple PRACH channels are

configured in the cell, you need only to ensure that the scrambling

codes are different between PRACH physical channels.

Initial Dynamic Persistence Level

3GPP Name Dynamic persistence level


Field Name DynPstLevelInit

Description

This parameter indicates the initial value of the dynamic persistence level

used for calculating the sending possibility of the MAC layer in the event of ASCi ≥ 1. each PRACH should be configured with a dynamic

persistence level. The dynamic persistence levels of multiple PRACH

channels can be broadcasted in SIB 7.


GUI Element Name Initial dynamic persistence level of PRACH

Value Range 1..8

Default Value 1

Scope UTRAN Cell

Function -


Dynamic persistence level determines the access probability of the MAC

layer. The larger the parameter value, the higher the access probability. If

the cell traffic is low, you can set the parameter value to 1 to avoid access


27

3GPP Name Dynamic persistence level

delay as best as possible. If the cell traffic is high, you can reduce the

dynamic persistence level to prevent interference due to the conflict that

occurs during the access process of multiple subscribers. This ensures that

the subscribers can access the network at different points of time.

Maximum Allowed UL TX Power of RACH

3GPP Name Maximum allowed UL TX power


Field Name MaxRACHTxPwr

Description This parameter indicates the maximum uplink transmit power used by

the RACH.


GUI Element Name Maximum transmitting power of RACH

Value Range (-50..33) dBm

Default Value 24dBm

Scope UTRAN Cell



The configuration is associated with the cell coverage and UE

capabilities. In network planning, you should determine the coverage

according to the UE capabilities, and therefore determine the maximum

transmit power of the PRACH. A larger value is not sure the best. The

parameter value should match the coverage. Otherwise, large

interference occurs.

PRACH Preamble Power Ramp Step

3GPP Name Power Ramp Step


Field Name PRStep

Description

This parameter indicates that the UE needs to ramp up the step on the

basis of the original power after sending one preamble whereas failing

to receive any response from the AICH. The UE then uses this power to

send next preamble.


GUI Element Name PRACH preamble power ramp step

Value Range (1..8)dB step 1dB

Default Value 1dB

Scope UTRAN Cell


28

3GPP Name Power Ramp Step

Function -

Recommended Configuration In general, Power Ramp Step affects the speed of random access of the

UE. Typically, Use the default settings.

Maximum Number of Preamble Being Transmitted

3GPP Name Preamble Retrans Max


Field Name MaxPreamRetrans

Description This parameter defines the maximum number of access preambles of

the L1 layer before the layer receives the ACK or NACK response.


GUI Element Name Maximum number of preamble being transmitted of PRACH

Value Range 1..64

Default Value 40

Scope UTRAN Cell

Function -

Recommended Configuration This parameter indicates the attempts of the physical layer preamble.

Typically, you do not need to change the parameter value.

Sets Lower Bound for Random Back-off of MAC Layer

3GPP Name NB01min


Field Name NB01min

Description

This parameter indicates the minimum time limit for resending after

NACK is received. When the UE receives the negative response from

the AICH, the MAC layer needs to start the timer Tbo1 so that the

MAC layer can attempt to resend after a specific time. This avoids

frequent refusal.

TBO1 can be set to NBO1 times the interval of 10 ms and randomly

changes in a range. Use this expression to determine NBO1: 0 ≤

NBO1min ≤ NBO1 ≤ NBO1max.

After TB01 expires, a new RACH attempt starts.


GUI Element Name Sets lower bound for random back-off of MAC layer

Value Range 0..50

Default Value 3


29

3GPP Name NB01min

Scope UTRAN Cell

Function -


The random backoff lower and upper limits of the MAC layer are the

time lengths for waiting for next access after failure to access the

physical layer is determined. The greater the NB01min value, the

longer the time to wait. Typically, use the default settings.

Sets Upper Bound for Random Back-off of MAC Layer

3GPP Name NB01max


Field Name NB01max

Description

This parameter indicates the maximum time limit for resending after

NACK is received.

When the UE receives the negative response from the AICH, the MAC

layer needs to start the timer Tbo1 so that the MAC layer can attempt to

resend after a specific time. This avoids frequent refusal.

TBO1 can be set to NBO1 times the interval of 10 ms and randomly

changes in a range. Use this expression to determine NBO1: 0 ≤

NBO1min ≤ NBO1 ≤ NBO1max.

After TB01 expires, a new RACH attempt starts.


GUI Element Name Sets upper bound for random back-off of MAC layer

Value Range 0..50

Default Value 40

Scope UTRAN Cell

Function -


The random backoff lower and upper limits of the MAC layer are the

time lengths for waiting for next access after failure to access the

physical layer is determined. A greater difference between NBO01max

and NB01min reduces the probability of next conflict after a subscriber

fails to access the network. Typically, use the default settings.

Maximum Number of Preamble Ramping Cycles of RACH



Field Name Mmax

Description This parameter indicates the maximum number of possibilities


30


for the MAC layer to attempt to send again. When the

physical layer returns NACK or NO ACK, the number of

attempts of the MAC layer, namely, M increases by 1. When

the value of M exceeds Mmax, the MAC layer exits from the

access process.


GUI Element Name Maximum number of preamble ramping cycles of RACH

Value Range 1..32

Default Value 6

Scope UTRAN Cell

Function -

Recommended Configuration This parameter indicates the maximum number of access

attempts of the MAC layer. Typically, use the default settings.

AICH Transmitting Power

3GPP Name AICH Power offset; AICH Power



Field Name AichPwr

Description This parameter indicates the transmit power of the AICH. The

value is an offset relative to the primary pilot power.


GUI Element Name AICH transmitting power

Value Range (-22..5) dB step 1dB

Default Value -7dB

Scope UTRAN Cell



The AICH transmit power affects the feedback of the random

access process. Therefore, it is important to set the power.

However, since the AICH power is relative to the pilot channel,

only if the coverage of the pilot channel is guaranteed, the AICH

power offset can meet the requirement with its default value.

31

4 UE call establishment parameter

Call establishment process shall be executed once UE selecting the cell with interaction.

It also shall be executed after staying on the serving cell if subsequent Traffic requests

shall be initiated.

Call establishment process is shown as follows:


32

The Chapter is only to introduce parameters which are not relevant to UE call process

and Radio Resource Management. Parameters related to radio resource management

are introduced in other Chapters.

Waiting Time after UE Sending RRC CONNECTION SETUP REQUEST

Message (T300)

Chapter 4 UE call establishment parameter

33

3GPP Name T300


Field Name T300

Description This parameter indicates the wait after the UE sends the "RRC

CONNECTION SETUP REQUEST" message.


GUI Element Name Waiting time after UE sending RRC CONNECTION SETUP

REQUEST messages (T300)

Value Range

OMCR:

(100,200,400,600,800,1000,1200,1400,1600,1800,2000,3000,4000,6

000,8000) ms

RNC:(0..14)

Default Value 2000ms

Scope RNC

Function -

Recommended Configuration You should consider at least one loopback delay for this parameter.

Maximum Number of Retransmissions of the RRC CONNECTION REQUEST

Message (N300)

3GPP Name N300


Field Name N300

Description This parameter indicates the maximum times for resending the

"RRC CONNECTION SETUP REQUEST" message.


GUI Element Name Maximum number of retransmission of the RRC CONNECTION

SETUP REQUEST message (N300)

Value Range (0..7)

Default Value 3

Scope RNC

Function -

Recommended Configuration This parameter offers multiple sending chances for the RRC link

request. Typically, use the default settings.

Waiting Time for Receiving "In Sync" from L1 in Idle Mode (T312 in Idle Mode)

3GPP Name T312



34

3GPP Name T312

Field Name T312Idle

Description

This parameter indicates T312 in idle mode, that is, the time that

the UE waits for the L1 synchronization indication for starting to

establish a dedicated channel.


GUI Element Name Waiting time for receiving “In Sync” from L1 in idle mode (T312

in Idle Mode)

Value Range (1..15)s

Default Value 2s

Scope RNC

Function -


The greater the parameter value, the longer time the physical layer

takes for synchronization. Typically, the principle is to reduce the

time for the physical layer to establish the link, and therefore to

reduce the call success delay.

Maximum Number of "In Sync" Received from L1 in Idle Mode (N312 in Idle

Mode)

3GPP Name N312


Field Name N312Idle

Description

This parameter indicates N312 in idle mode, that is, the number of

consecutive "in sync" indications that the UE receives from L1

before it successfully establishes a dedicated channel.


GUI Element Name Maximum number of “In Sync” received from L1 in idle mode（N312 in Idle Mode）

Value Range OMCR: (1, 2, 4, 10, 20, 50, 100, 200, 400, 600, 800, 1000)

RNC: ( 0..11)

Default Value 10

Scope RNC

Function -






Waiting Time for Receiving "In Sync" from L1 in Connected Mode (T312 in


35

Connected Mode)

3GPP Name T312


Field Name T312Connected

Description

This parameter indicates T312 in connected mode, that is, the time

that the UE waits for the L1 synchronization indication for starting

to establish a dedicated channel.


GUI Element Name Waiting time for receiving “In Sync” from L1 in connected mode

(T312 in Connected Mode)

Value Range (1..15)s

Default Value 1s

Scope RNC

Function -






Maximum Number of "In Sync" Received from L1 in Connected Mode (N312 in

Connected Mode)

3GPP Name N312


Field Name N312Connected

Description Number of “In Sync” received from L1 for N312 in idle mode

before successful establishment of special signal channel


GUI Element Name Maximum number of “In Sync” received from L1 in connected mode（N312 In Connected Mode）

Value Range OMCR: (1, 2, 4, 10, 20, 50, 100, 200, 400, 600, 800, 1000)

RNC: (0..11)

Default Value 1

Scope RNC

Function -






36

3GPP Name N312


Waiting Time after DPCCH Established in CELL_DCH State Losing

Synchronization (T313)

3GPP Name T313


Field Name T313

Description This parameter indicates the time to wait after the DPCCH in

CELL_DCH state loses synchronization.


GUI Element Name Waiting time after DPCCH established in CELL_DCH state losing synchronization（T313）

Value Range (0..15) s

Default Value 3s

Scope RNC

Function -


After "out of sync", the message indicating the real failure should

be reported to the upper layer after a specific time. Therefore, the

parameter value cannot be too small; otherwise, unnecessary link

release will result. Typically, use the default settings.

Maximum Number of Successive "Out of Sync" Received from L1 (N313)

3GPP Name N313


Field Name N313

Description This parameter indicates the maximum number of consecutive "out

of sync" indications received from L1.


GUI Element Name Maximum number of successive “out of sync” received from L1

(N313)

Value Range OMCR: (1, 2, 4, 10, 20, 50, 100, 200)

RNC: (0..7)

Default Value 50

Scope RNC

Function -

Recommended Configuration After the link is established, because the radio environment


37

3GPP Name N313

becomes bad, the link is out of sync. This parameter sends the

indication of this "out of sync" to the upper layer, which was

determined by the physical layer in advance. The parameter value

cannot be too small; otherwise, calls drop in case that a sudden and

short bad change of the environment occurs.

Maximum Number of Successive "In Sync" Received from L1 When T313 is

Activated (N315)

3GPP Name N315


Field Name N315

Description

This parameter indicates the maximum number of consecutive "in

sync" indications that the UE receives from L1 in T313 active

state.


GUI Element Name Maximum number of successive “In Sync” received from L1 when

T313 is activated (N315)

Value Range OMCR: (1, 2, 4, 10, 20, 50, 100, 200, 400, 600, 800, 1000)

RNC: (0..11)

Default Value 1

Scope RNC

Function -






39

5 Paging parameter

PICH signal channels shall be detected when UE is under CELL_PCH/URA_PCH and

idle states. PCH channel carried by SCCPCH shall be monitored to gain paging

message which is paging type 1.

Calculation formula of paging occasion is shown as follows:

Paging Occasion= (IMSI div K) mod (DRX cycle length) + n * DRX cycle length

In which:

K: It refers to several PICHs.

n = 0, 1, 2… as long as SFN is below its maximum value.

Calculation formula of subscriber’s position in PICH:

PI = DRX Index mod Np

When: DRX Index = IMSI div 8192

Detailed position in PICH shall be calculated as follows:

⎣ ⎦ ⎣ ⎦ ⎣ ⎦( )( )( ) NpNpSFNSFNSFNSFNPIq mod144

144mod512/64/8/18 ⎟⎟⎠

⎞⎜⎜⎝

⎛⎥⎦⎥

⎢⎣⎢ ×+++×+=

Mapping of paging indicators Pq to PICH bits:

Number of paging indicators

per frame (Np) Pq = 1 Pq = 0

Np=18 {b16q, …, b16q+15} = {1, {b16q, …, b16q+15} = {0,


40

Number of paging indicators

per frame (Np) Pq = 1 Pq = 0

1,…, 1} 0,…, 0}

Np=36 {b8q, …, b8q+7} = {1, 1,…,

1}

{b8q, …, b8q+7} = {0,

0,…, 0}

Np=72 {b4q, …, b4q+3} = {1, 1,…,

1}

{b4q, …, b4q+3} = {0,

0,…, 0}

Np=144 {b2q, b2q+1} = {1, 1} {b2q, b2q+1} = {0, 0}

UE also can receive paging message which is paging type 2 under CELL_DCH status.

DCCH logic channel is adopted so there is no need to calculate paging occasion.

CS Domain Discontinuous Reception (DRX) Cycle Length Coefficient

3GPP Name CN domain specific DRX cycle length coefficient


Field Name Kcs

Description

This parameter is used for DRX receiving of the UE in idle,

CELL_PCH connected, and URA_PCH connected states.

The parameter is a constant used to calculate paging occasions, or

say, required intercepting the period of the PICH. The DRX

receiving period is 2k frames. If the UE is in idle state and has

performed attaching operations in the CS domain and PS domain,

the UE selects the minimum value of CN domain specific DRX

cycle length coefficient of both domains as k. otherwise, the UE

selects CN domain specific DRX cycle length coefficient of the

cross-attaching operation as k.

If the UE is in connected state, it selects the minimum value of

UTRAN DRX cycle length coefficient and CN domain specific

DRX cycle length coefficient of the cross-attaching operation

domain as k.


GUI Element Name CS domain DRX cycle length coefficient

Value Range 6..9

Default Value 6

Scope RNC

Function -


The size of Kcs determines the paging period of the CS domain

services. The greater the parameter value, the longer the paging

period. Therefore, subscribers respond to the network slower. CS

domain paging has a higher requirement for real time. Therefore,

Chapter 5 Paging parameter

41


typically, the parameter should use the minimum value specified

by the protocol.

PS Domain DRX Cycle Length Coefficient



Field Name Kps

Description

This parameter is used for DRX receiving of the UE in idle,

CELL_PCH connected, and URA_PCH connected states.

The parameter is a constant used to calculate paging occasions, or

say, required intercepting the period of the PICH. The DRX

receiving period is 2k frames.

If the UE is in idle state and has performed attaching operations in

the CS domain and PS domain, the UE selects the minimum value

of CN domain specific DRX cycle length coefficient of both

domains as k. otherwise, the UE selects CN domain specific DRX

cycle length coefficient of the cross-attaching operation as k.

If the UE is in connected state, it selects the minimum value of

UTRAN DRX cycle length coefficient and CN domain specific

DRX cycle length coefficient of the cross-attaching operation

domain as k.


GUI Element Name PS domain DRX cycle length coefficient

Value Range 6..9

Default Value 6

Scope RNC

Function -


The size of Kps determines the paging period of the PS domain

services. The greater the parameter value, the longer the paging

period. Therefore, subscribers respond to the network slower. PS

domain paging has a lower requirement for real time. This means

that you can configure a larger value of Kcs. However, considering

subscriber experience, the parameter still uses its minimum value.

UTRAN DRX Cycle Length Coefficient


42

3GPP Name UTRAN DRX cycle length coefficient


Field Name KUtran

Description

It is used for DRX under idle status and Cell_PCH or URA_PCH

connected state. It can be used to calculate paging occasion which

is a constant required for PICH cycle. DRX cycle is 2k.

UE will regard the minimum value of UTRAN DRX cycle length

coefficient and CN domain specific DRX cycle length coefficient

as k.


GUI Element Name UTRAN DRX cycle length coefficient

Value Range 3..9

Default Value 6

Scope RNC

Function -


KUtran is paging cycle in UTRAN side configured for subscribers

without distinguishing PS and CS. A suitable paging cycle shall be

mainly defined from the angle of radio resources in radio side.

Number of Paging Indicators per PICH Frame

3GPP Name Number of PI per frame; PICH Mode

3GPP Reference TS 25.331: “RRC Protocol Specification”;


Field Name Np

Description The parameter indicates the number of paging indicators per

PICH frame.


GUI Element Name Number of paging indicators per PICH frame

Value Range (18, 36, 72, 144)

Default Value 18

Scope UTRAN Cell



Np indicates the number of subscribers of the PICH. The larger

Np is, the larger the number of subscribers can be indicated.

However, the actual number of subscribers that the PICH

indicates is associated with the subscriber message carried over

the PCH. Therefore, the parameter value cannot be too large. A

smaller value ensures that the sent data bits can be repetitive and

Chapter 5 Paging parameter

43

3GPP Name Number of PI per frame; PICH Mode

the power resource can be smaller.

Sending Times of One Paging Message

3GPP Name -

3GPP Reference -

Field Name PagingSendTimes

Description This parameter indicates the maximum times for sending a paging

message.


GUI Element Name Sending times of one paging message

Value Range 1..6

Default Value 3

Scope UTRAN Cell

Function -

Recommended Configuration This parameter improves the success rate of receiving a paging

message by a subscriber. Typically, set the parameter value to 3.

PCH Transmitting Power

3GPP Name PCH Power


Field Name PchPwr

Description

This parameter indicates the transmit power of the PCH mapped

to the SCCPCH, which is relative to the power offset of the power

of the PCPICH.


GUI Element Name PCH transmitting power

Value Range (-35..15) dB step 0.1dB

Default Value -3dB

Scope UTRAN Cell



PCH is carried over the SCCPCH. Typically, this parameter is

used when only the PCH is carried over the SCCPCH. Therefore,

when configuring this power, you need to only ensure that PCH

can be corrected decoded at the edges of the cell. Typically, use

the default settings.

PICH Transmitting Power


44

3GPP Name PICH Power offset; PICH Power



Field Name PichPwr

Description This parameter indicates the transmit power of the PICH. It is an

offset relative to the primary pilot power.


GUI Element Name PICH transmitting power

Value Range (-10.. 5) dB step1 dB

Default Value -7dB

Scope UTRAN Cell



PICH power is also relative to the PCPICH power and associated

with Np. Currently, the default value is the power offset in case of

Np=18. The power should decrease with the increase of Np.

45

6 Power control parameter

UMTS power control includes power control of open loop, internal loop and external

loop. Open loop power control is actually used to configure original transmitting power

and set the maximum and minimum transmitting power for internal loop power control.

Therefore, power control of open and internal loops shall be placed together.

6.1 Basic principle of internal loop power control

Basic process of internal loop power control

Receiving end will measure signal to interference ratio (SIR＝Eb/No) for every

received radio chain circuit then compared with target signal to interference ratio

required for Traffic.

Return control message to send a transmitted power control-TPC command of which

bit value is 0 to sender if SIR>=SIRtarget.

A TPC command of which bit value is 1 will be returned to sender by Downlinkcontrol

channel if SIR<SIRtarget.

Sender will determine increasing/decreasing transmitting power according to received

TPC command and designated power control algorithm. Adjustment amplitude＝

TPC_cmd×TPC_STEP_SIZE (TpcStepSize)

1. Uplinkinternal loop power control

Uplinkinternal loop power control is used for NodeB to adjust UE transmitting power

according to received SIR of DPCCH and target SIR.

There are 2 algorithms for uplinkinternal loop power control.

The 1st algorithm is internal loop power control for every time slot and the 2nd

algorithm is internal loop power control for every 5 time slots.

Downlinkinternal loop power control

Downlinkinternal loop power control is used for UE to adjust NodeB transmitting

power according to received DPCH SIR and target SIR.

There are 2 modes for Downlinkinternal loop power control.


46

The 1st mode is internal loop power control for every time slot and the 2nd mode is

internal loop power control for every 3 time slots.

DPCH PC Preamble Length

3GPP Name PC preamble; PC Preamble



Field Name DpcchPcpLen

Description

This parameter indicates the length of the DPCH power control

(PC) preamble. For the uplink DPCH channel, the PC preamble

should be sent prior to the data channel, and closed-loop power

control has been started the time the PC preamble is sent. This

best ensures that the power of the data channel meets the

requirement.


GUI Element Name DPCH PC preamble length

Value Range (0..7) Frames step 1

Default Value 0 Frames

Scope UTRAN Cell


Recommended

Configuration

DPCH PC Preamble Length has the same purpose of SrbDelay.

You need to configure only one of them.

SRB Delay

3GPP Name SRB delay; SRB Delay


TS 25.423: "UTRAN Iur interface RNSAP signaling"

Field Name SrbDelay

Description

This parameter indicates the number of SRB delay frames.

Upon the time to send the uplink DPDCH data, the signaling

data RB0–RB4 in the SRB delay frame is not sent.


GUI Element Name SRB delay

Value Range (0..7) Frames step 1

Default Value 7Frames

Scope UTRAN Cell


Chapter 6 Power control parameter

47

3GPP Name SRB delay; SRB Delay

Recommended

Configuration

The recommended configuration is the same as that of

DpcchPcpLen.

Uplink Internal Loop Power Control Algorithm

3GPP Name Power Control Algorithm


Field Name UlIlPcAlg

Description

This parameter indicates which inner loop power control

algorithm should be used. For algorithm 1, inner loop power

control is carried out per hour. For algorithm 2, inner loop

power control is carried out every five timeslots.


GUI Element Name Uplink Internal Loop Power Control Algorithm

Value Range 1: The 1st algorithm

2: The 2nd algorithm

Default Value The 1st algorithm

Scope UTRAN Cell and Service Related


Recommended

Configuration

Typically, if the channel is stable, algorithm 1 should be used. If

channel fading is serious, and radio quality features large

fluctuation, algorithm 2 should be used.

TPC Step Size of UplinkInternal Loop

3GPP Name TPC step size


Field Name TpcStepSize

Description

This parameter indicates the adjustable step size of the uplink

inner loop power control. This parameter should be configured

only when algorithm 1 is selected as the uplink inner loop

power control algorithm. For algorithm 2, the default step size

is 1, and you should use the default value.


GUI Element Name TPC step size of uplinkinternal loop

Value Range (1,2) dB

Default Value 1dB



48

3GPP Name TPC step size


Recommended

Configuration

When algorithm 1 is selected as the uplink inner loop power

control algorithm, TPC step size is adjustable. Typically, the

parameter value should allow the UE to trace the change of the

channel conditions under worst circumstances and maintain the

QoS in time according to the conditions of the UE in the cell,

such as speed and fading. In addition, when the channel is

stable, the step size should be able to keep the power fluctuation

stable. Typically, the default settings can meet the requirement.

DPC Mode of DownlinkInternal Loop

3GPP Name DPC Mode


TS 25.423: “UTRAN Iur interface RNSAP signalling”

Field Name DPCMode

Description

This parameter indicates which algorithm for downlink inner

loop power control should be used. There are two algorithms for

downlink inner loop power control, that is, Single TPC and TPC

triplet in soft. No matter which algorithm is used, the UE must

be notified.


GUI Element Name DPC mode of Downlinkinternal loop

Value Range 0 : Single time slot mode

1: 3-time-slot mode

Default Value Single time slot mode



Recommended

Configuration


UlIlPcAlg.

TPC DL Step Size

3GPP Name FDD TPC Downlink Step Size;



Field Name TpcDlStep

Description

This parameter indicates the adjustable step size of the

downlink inner loop power control. Typically, in the event of a

good radio environment set the parameter to a large value.


49

3GPP Name FDD TPC Downlink Step Size;


GUI Element Name TPC DL Step Size

Value Range (0.5, 1, 1.5, 2) dB

Default Value 1dB



Recommended

Configuration


TpcStepSize.

DPCH Maximum DL Power

3GPP Name Maximum DL Power; Maximum DL TX Power



Field Name MaxDlDpchPwr

Description

This parameter indicates the maximum downlink transmit

power of the DPCH. When the downlink inner loop power

control is executed, the new transmit power must be smaller

than or equal to the DPCH maximum downlink transmit power.

If the calculated new transmit power is greater than the

configured DPCH maximum downlink transmit power, it must

be changed as equal to the DPCH maximum downlink transmit

power.


GUI Element Name DPCH maximum DL power

Value Range (-35..15) dB step 0.1 dB

Default Value

Conversational DL 3.4kbps Signaling(AM): 0 dB

Conversational DL 13.6kbps Signaling:0dB

Conversational DL WAMR 6.60~23.85kbps: 0dB

Conversational DL 64kbps (PS Conversational Video): 3dB

Conversational DL NAMR 4.75~12.2kbps: 0dB

Conversational DL CS 28.8kbps: -6dB

Conversational DL CS 32kbps: -4dB

Conversational DL CS 64kbps: 3dB

Streaming DL CS 14.4kbps: -7dB



Streaming DL CS 64kbps: 3dB

Streaming DL PS 16kbps:-4dB


50


Streaming DL PS64kbps: 1dB



Interactive DL PS 8kbps:-8dB


Interactive DL PS64kbps: 1dB



Background DL PS 8kbps:-8dB


Background DL PS64kbps: 1dB



Streaming DL CS64kbps: 3dB

Interactive DL PS 1.2Mbps: 4dB





Background DL PS 1.2Mbps: 4dB





Streaming DL PS 1.2Mbps: 4dB










Streaming DL PS 21.096Mbps: 4dB Scope UTRAN Cell, Service and Diversity Mode Related


Recommended

Configuration

The parameter configuration restricts a single subscriber on use

of the cell power resource. Whether the configuration is correct

affects the cell throughput. The configuration principle is that


51


the parameter must be configured according to the Ec/No

required by the service and processing gain. The configuration

should be able to maintain the basic QoS of the service and

ensure the performance of the total cell throughput. Typically,

the larger the rate, the larger the maximum transmit power.

DPCH Minimum DL Power

3GPP Name Minimum DL Power



Field Name MinDlDpchPwr

Description

This parameter indicates the minimum downlink transmit power

of the DPCH. When the downlink inner loop power control is

executed, the new transmit power must be greater than or equal

to the DPCH maximum downlink transmit power. If the

calculated new transmit power is smaller than the configured

DPCH maximum downlink transmit power, it must be changed

as equal to the DPCH minimum downlink transmit power.


GUI Element Name DPCH Minimum DL Power

Value Range (-35..15) dB step 0.1 dB

Default Value

Conversational DL 3.4kbps Signaling(AM): -13dB

Conversational DL 13.6kbps Signaling:-13dB

Conversational DL WAMR 6.60~23.85kbps: -15dB

Conversational DL 64kbps (PS Conversational Video) : -10dB

Conversational DL NAMR 4.75~12.2kbps: -15dB

Conversational DL CS 28.8kbps: -15dB






Streaming DL CS64kbps: -10dB

Streaming DL PS 16kbps:-15dB

Streaming DL PS 64kbps: -15dB






52

3GPP Name Minimum DL Power

Interactive DL PS 64kbps: -15dB





Background DL PS 64kbps: -15dB



Interactive DL PS 1.2Mbps: -10dB





Background DL PS 1.2Mbps: -10dB





Streaming DL PS 1.2Mbps: -10dB










Streaming DL PS 21.096Mbps: -10dB Scope UTRAN Cell, Service and Diversity Mode Related


Recommended

Configuration

The parameter configuration ensures the minimum QoS of a

service. Therefore, whether the configuration is correct greatly

affects QoS sense of subscribers. The configuration principle is:

The minimum power should be able to maintain the basic

service QoS according to the Ec/No and processing gain

required by the service.

DPCH PO1 in TFCI Domain

3GPP Name PO1


53

3GPP Name PO1



Field Name DpchPO1

Description This parameter indicates the power offset between the TFCI

field and the data field of the downlink DPCH.


GUI Element Name DPCH PO1 in TFCI domain


Default Value

Conversational DL 3.4kbps Signaling(AM) : 0dB


Conversational DL WAMR 6.60k~23.85kbps : 0dB

Conversational DL 64kbps (PS Conversational Video) : 0dB

Conversational DL NAMR 4.75k~12.2k: 0dB

Conversational DL CS 28.8kbps: 0dB



Streaming DL CS 14.4kbps: 0dB




Streaming DL PS 16kbps: 0dB




Interactive DL PS 8kbps: 0dB





Background DL PS 8kbps: 0dB











54

3GPP Name PO1


















Recommended

Configuration

The offset of the TFCI field is relative to the data typically, to

guarantee the correctness of the control field, the larger the data

field rate, the larger its power, and the small of the difference of

the DPCH control field.

DPCH PO2 in TPC Domain

3GPP Name PO2



Field Name DpchPO2

Description This parameter indicates the power offset between the TPC field

and the data field of the DPCH.


GUI Element Name DPCH PO2 in TPC domain


Default Value

Conversational DL 3.4kbps Signaling(AM): 3dB


Conversational DL WAMR 6.60~23.85kbps : 3dB

Conversational DL 64kbps (PS Conversational Video) 3dB:




55

3GPP Name PO2







Streaming DL PS 16kbps:3dB




Interactive DL PS 8kbps:3dB

Interactive DL PS 16kbps:3dB




Background DL PS 8kbps:3dB

Background DL PS 16kbps:3dB

























56

3GPP Name PO2


Scope UTRAN Cell, Service and Diversity Mode Related


Recommended

Configuration

The recommended configuration is the same as that

ofDpchPO1.

DPCH PO3 in PILOT Domain

3GPP Name PO3



Field Name DpchPO3

Description This parameter indicates the power offset between the PILOT

field and the data field of the downlink DPCH.


GUI Element Name DPCH PO3 in PILOT domain


Default Value

Conversational DL 3.4kbps Signaling(AM): 0dB

Conversational DL 13.6kbps Signaling: 0dB

Conversational DL WAMR 6.60~23.85kbps: 0dB

Conversational DL 64kbps (PS Conversational Video): 0dB




















57

3GPP Name PO3



























Recommended

Configuration


DpchPO1.

Maximum Allowed Uplink DPCH Transmission Power

3GPP Name Maximum allowed UL TX power; Maximum Allowed UL Tx

Power


TS 25.423: "UTRAN Iur interface RNSAP signaling"

Field Name MaxUlDpchPwr

Description

This parameter indicates the maximum transmit power of the

uplink DPCH of the UE. When the uplink inner loop power

control is executed, the new transmit power calculated by the


58

3GPP Name Maximum allowed UL TX power; Maximum Allowed UL Tx

Power

UE may exceed the parameter value. In this case, the UE must

follow the configured uplink DPCH maximum transmit power.


GUI Element Name Maximum Allowed Uplink DPCH Transmission Power

Value Range (-50..33) dBm step 1

Default Value 33dBm

Scope UTRAN Cell, Service and Diversity Mode Related


Recommended

Configuration -

6.2 Basic principle of external loop power control

Internal loop power control is to control SIR of single chain circuit to be close to SIR

Target. As an auxiliary method, basic principle of external loop power control is that

receiver will adjust SIR Target slowly according to actual data receiving quality to

guarantee no influence to Traffic quality due to variation of radio environment and

maintain relatively constant communication quality.

External loop power control process is shown as follows:

Overall process of closed loop power control:


59

NodeB

RNC

SIR target External loop power control: Adjust SIR target according to transmission channel quality.

UE

Measure SIR according to

received DPCCH

Receive TPC

Determine and feedback TPC

command according to SIR of received

DPCCH

Compare with SIR and SIR target

Receive transmission

channel messages

Determine and adjust transmitting power

Uplink Initial SIR Target

3GPP Name UL SIR Target



Field Name ULInitSIR

Description

This parameter indicates the initial value of the target

signal-to-interference ratio (SIR) of the uplink physical channel.

The target SIR is the standard for uplink inner loop power

control. This parameter affects the convergence speed of power

control.


GUI Element

Name Uplink initial SIR target

Value Range (-8.2..17.3) dB step 0.1 dB

Default Value

Conversational UL 3.4kbps Signaling(AM): 5.0dB

Conversational UL 13.6kbps Signaling:5dB

Conversational UL AMR 6.60~23.85kbps: 4dB

Conversational UL 64kbps (PS Conversational Video): 6dB

Conversational UL NAMR4.75~12.2kbps: 4dB

Conversational UL CS 28.8kbps: 6.0dB

Conversational UL CS 32kbps: 6.0dB


Streaming UL CS 14.4kbps: 4dB

Streaming UL CS 28.8kbps: 6.0dB


60

3GPP Name UL SIR Target


Streaming UL CS 64kbps: 6.0dB

Streaming UL PS 16kbps:4dB

Streaming UL PS 64kbps: 6dB


Streaming UL PS128kbps: 6dB

Interactive UL PS 8kbps:4dB


Interactive UL PS 64kbps: 6dB


Interactive UL PS128kbps: 6dB

Background UL PS 8kbps:4dB


Background UL PS 64kbps: 6dB


Background UL PS128kbps: 6dB

Streaming UL CS64kbps: 6dB


Interactive UL PS 2.048Mbps: 6dB

Interactive UL PS 3. 072Mbps: 6dB




Background UL PS 2.048Mbps: 6dB

Background UL PS 3. 072Mbps: 6dB




Streaming UL PS 2.048Mbps: 6dB

Streaming UL PS 3. 072Mbps: 6dB


Streaming UL PS 5.76Mbps: 6dB Scope UTRAN Cell, Service and Diversity Mode Related


Recommended

Configuration

This parameter is associated with the service rate. Typically, the

smaller the rate, the smaller the parameter value; the greater the

rate, the greater the parameter value.

Maximum Uplink SIR Target

3GPP Name Maximum Uplink SIR


61


3GPP Reference TS 25.423: "UTRAN Iur interface RNSAP signalling"

Field Name ULMaxSIR

Description

This parameter indicates the maximum target SIR of the uplink

link. This value restricts the adjustable range of the target SIR of

outer loop power control.


GUI Element

Name Maximum uplink SIR target


Default Value

Conversational UL 3.4kbps Signaling(AM): 15dB

Conversational UL 13.6kbps Signaling:15dB

Conversational UL AMR 6.60~23.85kbps: 15dB

Conversational UL 64kbps (PS Conversational Video): 15dB

Conversational UL NAMR 4.75~12.2kbps: 15dB

Conversational UL CS 28.8kbps: 15dB

Conversational UL CS 32kbps: 15dB

Conversational UL CS 64kbps: 15dB




Streaming UL CS 64kbps: 15dB

















Interactive UL PS 3. 072Mbps: 15dB



62


Interactive UL PS 5.76Mbps: 17.3dB



Background UL PS 3. 072Mbps: 15dB


Background UL PS 5.76Mbps: 17.3dB



Streaming UL PS 3. 072Mbps: 15dB


Streaming UL PS 5.76Mbps: 17.3dB Scope UTRAN Cell, Service and Diversity Mode Related


Recommended

Configuration


greater the rate, the greater the parameter value.

Minimum Uplink SIR Target

3GPP Name Minimum Uplink SIR

3GPP Reference TS 25.423: "UTRAN Iur interface RNSAP signalling"

Field Name ULMinSIR

Description

This parameter indicates the minimum value of the target SIR of

the uplink link. This parameter restricts the adjustable range of

the target SIR of outer loop power control.


GUI Element

Name Minimum Uplink SIR Target


Default Value

Conversational UL 3.4kbps Signaling(AM): 2.0dB

Conversational UL 13.6kbps Signaling:2.0dB

Conversational UL AMR 6.60~23.85kbps: 0.5dB

Conversational UL 64kbps(PS Conversational Video): 2.0dB

Conversational UL NAMR 4.75~12.2kbps: 0.5dB

Conversational UL CS 28.8kbps: 2.0dB






Streaming UL CS 64kbps: 2.0dB


63

3GPP Name Minimum Uplink SIR


Streaming UL PS 64kbps: 2.0dB





Interactive UL PS 64kbps: 2.0dB





Background UL PS 64kbps: 2.0dB



Interactive UL PS 1024kbps: 4.0dB


Interactive UL PS 3. 072Mbps: 4.0dB



Background UL PS 1024kbps: 4.0dB


Background UL PS 3. 072Mbps: 4.0dB



Streaming UL PS 1024kbps: 4.0dB

Streaming UL PS 2.048Mbps: 4.0dB

Streaming UL PS 3. 072Mbps: 4.0dB

Streaming UL PS 4.096Mbps: 4.0dB

Streaming UL PS 5.76Mbps: 4.0dB Scope UTRAN Cell, Service and Diversity Mode Related


Recommended

Configuration


greater the rate, the greater the parameter value.

Uplink SIR Target Up Step Size

3GPP Name -

3GPP Reference -

Field Name UlSirTargUpStep

Description This parameter indicates the upward adjustable step size of the


64

3GPP Name -

target SIR of uplink outer loop power control. Asymmetric

mode is taken to set the upward and downward adjustable steps

so as to recover the communication quality as soon as possible

in the event that the environment becomes worse and slowly

reduce the communication quality (more reliable) in the event

that the environment becomes better.


GUI Element Name Uplink SIR Target Up Step Size

Value Range (0.1..0.5) dB step 0.1dB

Default Value UL 384K (PS): 0.5dB

Other: 0.3dB



Recommended

Configuration

The parameter should be set in view of the environment of the

cell where the UE resides in, such as speed and fading. This

makes the UE trace the change of the channel condition even in

the worst circumstances. In addition, when the channel is stable,

the system can maintain stable fluctuation of the power. Often,

the worse the channel condition, the greater the parameter

value. Typically, you should use the default value. The outer

loop power control should follow the principle of quick increase

and slow decrease. Quick increase is to ensure that the system

can quickly keep up with the change of the environment. Slow

decrease avoids call drop or bad subscriber experience due to

the quick decrease of the target SIR.

Uplink SIR Target Down Step Size

3GPP Name -

3GPP Reference -

Field Name UlSirTargDnStep

Description

This parameter indicates the downward adjustable step size of

the target SIR of uplink outer loop power control. Asymmetric

mode is taken to set the upward and downward adjustable steps

so as to recover the communication quality as soon as possible

in the event that the environment becomes worse and slowly

reduce the communication quality (more reliable) in the event

that the environment becomes better.



65

3GPP Name -

GUI Element Name Uplink SIR Target Down Step Size

Value Range (0.1..0.5) dB step 0.1dB

Default Value 0.1dB



Recommended

Configuration


UlSirTargUpStep.

67

7 Control parameter switch

The switch control includes the switch of synchronization frequency, frequencies and

systems, which is introduced as below.

7.1 Basic principle of intra-frequency switch

Intra-frequency switch refers to the switch of UE in the cell of UTRAN

synchronization frequency point with the continuity of Traffic ensured. The

inter-frequency switch is based on the switch of measurement. The inter-frequency

measurement includes active set measurement, monitoring set measurement and

detective set measurement.

The active set refers to the cell collection keeping radio link connection with UE.

The monitoring set refers to the cell collection, which keeps no radio link connection

with UE, sending message to UE for measurement through the measurement control of

synchronization frequency.

The detective set refers to the cell collection with synchronization frequency excluding

the cell in the active set and detective set.

The principle of inter-frequency is beased on the related actions of event execution

through measurement. The detail definition and handling process of event is as follows:

1. Event 1A

Event 1A means that the quality of certain cell outside the active set gets better. The

related target cell can be added into the active set when receiving 1A event to improve

the gain of more macro diversities. UE will report 1A to RNC when the cell enters into

the reporting range of the following formula.

/2)H(RLogM10W)(1MLog10WCIOLogM10 1a1aBest

N

1iiNewNew

A

−−⋅⋅−+⎟⎟⎠

⎞⎜⎜⎝

⎛⋅⋅≥+⋅ ∑

=

In which: the definition for each parameter is as follows:

The reporting range of R1a 1A event is used for controlling the difficulty level of cell’s

being added into active set (RptRange).


68

The report lag of H1a 1A event is used for controlling the difficulty level of cell’s being

added into active set (Hysteresis (Intra)).

MNew is the measurement of cell outside the active set to be evaluated.

CIONew is the offset of cell outside the active set compared to other cell

(CellIndivOffset (utranRelation).

Mi is the mean value of other cell excluding the best cell in the active set.

NA is the number of other cell excluding the best cell in the active set.

MBest is the measurement of the best cell for the active set.

W is used for the weighting proportion (W) of the best cell and other cell in the active

set for the evaluation criterion.

From the formula it can be seen that enlarging R1a (1A event meets the reporting range

of event quality standard) or decreasing H1a (lag range for judgement) can increase the

probability of 1A event. On the contrary, the probability of 1A event can be decreased.

1A event supports the periodical report. In other words, the 1A event will be reported

periodically (PrdRptInterval) until the event doesn’t meet the report condition or the

reporting time reaches the allowable maximum value (PrdRptAmount) when UE

detects the reporting range meeting quality standard of 1A event.

Chapter 7 Control parameter switch

69

1A event won’t be reported when the number of cell in the active set reaches certain

threshold (RptDeactThr) due to the limitation of number of active set.

2. Event 1B

Event 1B means that the quality of certain cell in the active set is bad with the related

cell deleted from active set when receiving 1B event. UE will report 1B to RNC when

the cell enters into the reporting range of the following formula.

/2)H(RLogM10W)(1MLog10WCIOLogM10 1b1bBest

N

1iiOldOld

A

+−⋅⋅−+⎟⎟⎠

⎞⎜⎜⎝

⎛⋅⋅≤+⋅ ∑

=

In which:

The reporting range of R1b 1B event is used for controlling the difficulty level of cell’s

being deleted from active set (RptRange).

The report lag of H1b 1B event is used for controlling the difficulty level of cell’s being

deleted from active set (Hysteresis (Intra)).

MOld is the measurement of cell outside the active set to be evaluated.

CIOOld is the offset of cell outside the active set compared to other cell (CellIndivOffset

(utranCell).

Mi is the mean value of other cell excluding the best cell in the active set.

NA is the number of other cell excluding the best cell in the active set.

MBest is the measurement of the best cell for the active set.

W is used for the weighting proportion (W) of the best cell and other cell in the active

set for the evaluation criterion.


70

3. Event 1C

Event 1C means that the quality of certain cell outside the active set is better than the

quality of certain cell inside the active set. The related cell outside the active set can be

used to replace the cell inside the active set when receiving 1C event to get better

macro diversity. UE will report 1C to RNC when the cell meets the formula below.

/2HCIOLogM10CIOLogM10 1cInASInASNewNew ++⋅≥+⋅

In which:

The report lag of H1c 1C event is used for controlling the difficulty level of cell’s being

replaced from active set (Hysteresis (Intra)).

MNew is the measurement of cell outside the active set to be evaluated.

MInAS is the cell with the worst quality in the active set.

CIONew is the offset of worst cell inside the active set compared to other cell

(CellIndivOffset (utranCell).

CIOInAS is the offset of the cell outside the active set to be evaluated compared to other

cell (CellIndivOffset (utranRelation)).


71

4. Event 1D

Event 1D means that the quality of certain cell inside the active set or outside the active

set is better than the quality of the best cell in the current active set. In other words, the

best cell of inter-frequency has changed. The soft adding (the reported 1D event of the

cell outside active set and the number of link inside the active don’t reach maximum

value) and soft replacement (the reported 1D event of the cell outside active set and the

number of link inside the active reach maximum value) or the change of serving cell

(focusing on HS-DSCH/E-DCH channel) can be triggered when receiving 1D event.

UE will report 1D to RNC when the cell meets the formula below.

/2HCIOLogM10CIOLogM10 1dBestBestNotBestNotBest ++⋅≥+⋅

In which:

MNotBest is the measurement of cell inside or outside the active set to be evaluated.

CIONotBest is the offset of cell inside the active set to be evaluated compared to other

cell (CellIndivOffset (utranCell) or the offset of cell outside the active set to be

evaluated compared to other cell (CellIndivOffset (utranRelation)).

CIOBes is the offset of cell inside the active set to be evaluated compared to other cell

(CellIndivOffset (utranCell).

MBest is the measurement of cell inside the active set to be evaluated.


72

H1d is the report lag of 1d event (Hysteresis (Intra)).

From the formula it can be seen that enlarging R1d (lag range for judgement) can

decrease the probability of 1D event. On the contrary, the probability of 1D event can

be increased.

Reporting Range Constant for Event 1A/1B

3GPP Name Reporting Range Constant


Field Name RptRange [MAX_INTRA_MEAS_EVENT]

Description

This parameter controls the triggering of 1a/1b event. The larger

the parameter is, the easily 1a event triggers with the 1b event

difficult to be triggered. On the contrary, 1a event is difficult to

be triggered with 1b event easily triggering when the value

decreases.

MAX_INTRA_MEAS_EVENT represents the maximum

number of the intra-frequency measure events. The value is 7.


GUI Element Name Reporting range of meeting event quality standard for 1a or 1b

event

Value Range (0..14.5)dB step 0.5dB

Default Value

Periodic report parameter for the Ec/No measure: -

UE event report parameter for the Ec/No measure: [3, 5, 0, 0, 0,

0, 0]

Periodic report parameter for the RSCP measure: -

UE event report parameter for the RSCP measure: [6, 8, 0, 0,

0, 0, 0]

Detection set parameter for the CPICH Ec/No measure: [4]

Detection set parameter for the CPICH RSCP measure: [7]


Function Handover Control (Inter-frequency Handover)

Recommended

Configuration

This parameter is determined mainly according to the principle

of the macro diversity "increase easily, decrease difficultly". In

case that the new is not very poor, it is added to the macro

diversity. However, if it is poor, it is removed out of the macro

diversity. According to this principle, it is easy to reach the state

of maximum macro diversity. This is the same as reaching the

maximum macro diversity gain. In this case, bad links can be

removed out of the macro diversity through the processing of

event 1c. For event 1a, the greater the parameter value is, the


73

3GPP Name Reporting Range Constant

lower the determination threshold of the event 1a is, and the

easier event 1a is triggered. For event 1b, the greater the

parameter value is, the higher the determination threshold of

event 1b is, the harder event 1b is triggered. The smaller the

parameter value is, the harder event 1a is triggered, and the

easier event 1b is triggered.

Weight for Event 1A/1B

3GPP Name W


Field Name W [MAX_INTRA_MEAS_EVENT]

Description

This parameter determines the quality of event 1a/1b and

indicates the weight in quality determination of a a cell with

best signal quality. The parameter is associated with the

measure and event type.




GUI Element Name Weight for Event 1A/1B

Value Range (0.0..2.0) step 0.1

Default Value


UE event report parameter for the Ec/No measure: [0.0 0.0 0.0

0.0 0.0 0.0 0.0]


UE event report parameter for the RSCP measure: [0.0 0.0 0.0

0.0 0.0 0.0 0.0]

Detection set parameter for the CPICH Ec/No measure: [0.0]

Detection set parameter for the CPICH RSCP measure: [0.0]



Recommended

Configuration

This parameter indicates the weight of the cell with best signal

quality. Typically, the configuration is based on the cell with

best signal quality.

Hysteresis

3GPP Name Hysteresis


Field Name Hysteresis[MAX_INTRA_MEAS_EVENT]


74


Description

This parameter indicates whether the determination event

satisfies the hysteresis of event triggering condition. It makes a

difference between the triggered state and the trigger released

state of an event. This parameter helps avoid the trigger state

change in case of a small change.

The greater the parameter value, the greater the threshold


state of an event.

This parameter is associated with the measure and event type.




GUI Element Name Hysteresis

Value Range (0..7.5) dB step 0.5dB

Default Value


UE event report parameter for the Ec/No measure: [0, 0, 4, 4, 2,

2, 4]


UE event report parameter for the RSCP measure: [4, 4, 6, 6,

4, 4, 6]





Recommended

Configuration

This parameter indicates the switching Determination hysteresis

for event 1a/1b/1c, and act on the determination of triggering of

event 1a/1b/1c. When you determine this parameter, you should

ensure that a small change of the signal will not trigger event

reporting of event 1a/1b and ensure timely triggering of event

1c/1d. The greater the parameter value is, the harder event

1a/1b/1c/1d is triggered; the smaller the parameter value is, the

easier event 1a/1b/1c/1d is triggered. For event 1a and event 1b,

typically, a smaller value is configured to reflect signal change

as soon as possible. For event 1c and event 1d, a greater value is

preferred. Otherwise, toggle switching occurs. Also, the

parameter value cannot be to large; otherwise, switching will be

delayed, and therefore serious call drop situation occurs.

Reporting Deactivation Threshold for Event 1A


75

3GPP Name Reporting deactivation threshold


Field Name RptDeactThr[MAX_INTRA_MEAS_EVENT]

Description

This parameter indicates the maximum number of cells allowed

in the active set. When the UE detects that the measurement

result of a active set satisfied the threshold for determining

event 1a, it first needs to determine whether the number of cells

in the current set is smaller than or equal to the parameter value.

If yes, event 1a is triggered; otherwise, event 1a is not triggered.




GUI Element Name Maximum number of allowable cell in the active cell.

Value Range (0, 1, 2, 3, 4, 5, 6, 7)

Default Value

This parameter should be configured only for event 1a.


UE event report parameter for the Ec/No measure: [2, -, -, -, -, -,

-]


UE event report parameter for the RSCP measure: [2, -, -, -, -,

-, -]





Recommended

Configuration

The size of the active set is restricted. When the number of cells

in the active set reaches a threshold (RptDeactThr), event 1a is

no longer reported. However, the macro diversity gain obtained

from the number of links in the active set does not follow linear

increase. Typically, when the number of macro diversity links is

set to 3, an ideal gain is obtained.

Replacement Activation Threshold for Event 1C and 1J

3GPP Name Replacement activation threshold


Field Name RplcActThr[MAX_INTRA_MEAS_EVENT]

Description

This parameter indicates the minimum number of cells allowed

in the active set in the event that event 1c is triggered, or

indicates the minimum number of cells allowed in the active


76

3GPP Name Replacement activation threshold

E-DCH set in the event that event 1j is triggered. When the UE

detects that the measurement result of a active set satisfied the

threshold for determining event 1c/1j, it first needs to determine

whether the number of cells in the current set is smaller than the

parameter value. If yes, event 1c/1j is not triggered. If the

parameter value is 0, it is invalid.




GUI Element Name Minimum number of allowable cell in the active cell.

Value Range (0, 1, 2, 3, 4, 5, 6, 7)

Default Value

This parameter should be configured only for event 1c and

event 1j.


UE event report parameter for the Ec/No measure: [-, -, 3, -, -, -,

3]


UE event report parameter for the RSCP measure: [-, -, 3, -, -,

-, 3]

Detection set parameter for the CPICH Ec/No measure: [-]

Detection set parameter for the CPICH RSCP measure: [-]



Recommended

Configuration

To ensure the switching of macro diversity gain, event 1c is

allowed to report only when the number of cells in the active set

reaches a threshold (RplcActThr). In other words, typically,

event 1c is triggered as an replacement in the event that the

active set is full.

Time to Trigger

3GPP Name Time to trigger


Field Name TrigTime[MAX_INTRA_MEAS_EVENT]

Description

This parameter indicates the time difference between monitored

event occurrence and event reporting. An event is triggered and

reported only when the event is detected and the condition for

triggering the event is always satisfied during the trigger period

indicated by the parameter.


77


The larger the value is, the stricter the trigger of the event is

determined. However, the time length should be set according

to the actual requirement. This is because a larger time affects

the communication quality.




GUI Element Name Time to trigger

Value Range (0, 10, 20, 40, 60, 80, 100, 120, 160, 200, 240, 320, 640, 1280,

2560, 5000) ms

Default Value


UE event report parameter for the Ec/No measure: [200, 640,

320, 320, 200, 200, 320] ms


UE event report parameter for the RSCP measure: [200, 200,

200, 200, 200, 200, 200] ms


ms


ms



Recommended

Configuration

This parameter is determined in view of sudden signal change.

If the signal quality of a cell becomes unstable, and therefore

the related event is triggered, switching processing might be

invalid in the meantime, and call drop might occur in case that

the situation is serious. To avoid this situation, in the preset time

period, an event is reported to UTRAN only when the signal

quality always meets the requirement. This ensures the

effectiveness of switching. The greater the parameter value is,

the harder event 1a/1b/1c/1d is triggered; the smaller the

parameter value is, the easier event 1a/1b/1c/1d is triggered.

However, the parameter value must be greater than the

intra-frequency periodic measurement time 200 ms. Otherwise,

the parameter configuration is meaningless.

Amount of Reporting for Event 1A/1B/1C/1J

3GPP Name Amount of reporting



78

3GPP Name Amount of reporting

Field Name EvtRptAmount[MAX_INTRA_MEAS_EVENT]

Description

This parameter indicates the maximum number of measurement

reports after event 1a/1b/1c/1j is triggered (because event

1a/1b/1c/1j is periodically reported after triggered). When the

event is triggered, the UE reports the measurement result

according to the reporting interval. If the amount of reporting

exceeds the parameter value, the UE stops reporting the

measurement result. If the determination result indicates that

event 1a/1b/1c/1j stops, even if the amount of reporting still

satisfies the parameter value, the UE will also stop reporting the

measurement result.




GUI Element Name Amount of Reporting for Event 1A/1B/1C/1J

Value Range (1, 2, 4, 8, 16, 32, 64, Infinity)

Default Value

This parameter should be configured only for event 1a, 1c, and

1j.


UE event report parameter for the Ec/No measure: [4, -, 4, -, -,

-, 4]


UE event report parameter for the RSCP measure: [4, -, 4, -, -,

-, 4]





Recommended

Configuration

To ensure event reporting reliability, periodic reporting is used

after the event is triggered. However, considering the flow of

the air interface, frequent and excessive reporting should be

avoided. Therefore, the reporting period and amount should be

restricted. Typically, use the default settings.

Reporting Interval for Event 1A/1B /1C/1J

3GPP Name Reporting interval


Field Name EvtRptInterval[MAX_INTRA_MEAS_EVENT]


79

3GPP Name Reporting interval

Description

This parameter indicates the periodic reporting interval of the

measurement result after event 1a/1b/1c/1j is triggered (because

event 1a/1b/1c/1j is periodically reported after triggered). When

the event is triggered, the UE reports the measurement result

according to the reporting interval. If the amount of reporting

exceeds the parameter value, the UE stops reporting the

measurement result. If the determination result indicates that

event 1a/1b/1c/1j stops, even if the amount of reporting still

satisfies the parameter value, the UE will also stop reporting the

measurement result.




GUI Element Name Reporting Interval for Event 1A/1B /1C/1J

Value Range (0, 250, 500, 1000, 2000, 4000, 8000, 16000) ms

Default Value

This parameter should be configured only for event 1a, 1c, and

1j.


UE event report parameter for the Ec/No measure: [2000, -,

2000, -, -, -, 2000]ms


UE event report parameter for the RSCP measure: [2000, -,

2000, -, -, -, 2000]ms

Detection set parameter for the CPICH Ec/No measure:

[2000]ms

Detection set parameter for the CPICH RSCP measure:

[2000]ms



Recommended

Configuration

To ensure event reporting reliability, periodic reporting is used

after the event is triggered. However, considering the flow of

the air interface, frequent and excessive reporting should be

avoided. Therefore, the reporting period and amount should be

restricted. Typically, use the default settings.

Cell Individual Offset

3GPP Name Cell Individual Offset



80

3GPP Name Cell Individual Offset

Field Name CellIndivOffset

Description

This parameter indicates the cell individual offset. An offset is

allocated for each monitored cell. The offset can be positive or

negative. The offset should be added to the measure before the

UE evaluates whether an event has occurred. Using a positive

offset, the number of measurement reports sent by the UE like

PCPICH is x dB better than the actual value. Similarly, a

negative offset can be used for CPICH. In this case, the

reporting of PCPICH is restricted. Using the cell individual

offset, the related cell will possibly (or at least temporarily)

work as the switched target cell or be removed from the active

set.


GUI Element Name Cell Individual Offset

Value Range OMCR: (-10..10) dB step 0.5

RNC:D= (P+10)*2,0..40

Default Value 0dB

Scope UTRAN Cell, GSM Neighboring Cell, UTRAN Neighboring

Cell

Function Mobility Management

Recommended

Configuration

This parameter indicates the individual characteristics of the

measured cell. You can use the same set of switching

configuration parameters on the entire network, and then use

CellIndivOffset to show the difference between cells. For

example, you can set a greater value of CellIndivOffset for the

environment (such as corner) requiring quick switching for

easier switching, and you can set a smaller value for the

environment that does not require quick switching for harder

switching. This parameter should be customized for some

special cells according to the specific situation of the radio

environment.

7.2 Basic principle of inter-frequency switch

The inter-frequency refers to that UE switches to another frequency point from one

frequency point of UTRAN network. The purpose of inter-frequency is to ensure the

service continuity and load sharing. Ensuring the service continuity is based on the

switch of inter-frequency measurement. The load sharing of inter-frequency is based on


81

the blind switch of coverage or inclusion relation. The background of inter-frequency

switch triggered by load sharing includes load balancing and load control.

The evaluation criterion for carrier wave of intra-frequency:

jBestj

N

1ijijjfrequencyfrequencyj LogM10)W(1MLog10WLogM10Q

jA

⋅⋅−+⎟⎟⎠

⎞⎜⎜⎝

⎛⋅⋅=⋅= ∑

=

In which:

Qfrequency j is the (virtual) active set quality of J carrier wave, namely the measuring

result of J carrier wave (dB for Ec/No, dBm for RSCP).

Mfrequency j is the measuring physical value of (virtual) active set for J carrier wave (ratio

for Ec/No, mW for RSCP).

Mi j is the measuring physical value of I cell for J carrier.

NA j is the cell number in the (virtual) active set for J carrier (excluding the best cell).

MBest j is the measuring result of the bset cell in the (virtual) active set for J carrier.

Wj is the weighting of the best cell in the (virtual) active set during the process of

carrier wave measuring (WnoUsed or Wused)

The definition and handling process of event for inter-frequency are as follows:

1. Event 2A

2A: the best carrier frequency is changed. This event is used for the determination of

inter-frequency switch for RNC. The compression mode needs to be started when UE

measures and reports the event.

/2HQQ 2aBestNotBest +≥

In which:

QNotBest is the measuring result of current non-best carrier wave.

QBest is the measuring result of current best carrier wave.

H2a is the delay parameter of switch determination for 2A event (Hysteresis (Inter))

2. Event 2B

2B: the quality of working carrier frequency is lower than a threshold and the quality of

non-working carrier frequency is higher than a threshold. This event is used for the


82

determination of inter-frequency switch for RNC. The compression mode needs to be

started when UE measures and reports this event.

/2HTQ 2b2busedNonusedNon +≥ And /2HTQ 2b2bUsedUsed −≤

In which:

QNon used is the measuring result of current non-using carrier wave.

TNon used 2b is the absolute threshold of good qality of non-using carrier wave for 2b

event determination (ThreshNoUsedFreq).

H2b is the delay parameter of 2b event determination (Hysteresis (Inter)).

QUsed is the measuring result of current used carrier frequency.

TUsed 2b is the absolute threshold of bad qality of non-using carrier wave of using carrier

wave for 2b event determination (ThreshUsedFreq).

3. Event 2C

2C: the quality of non-working carrier frequency is higher than a threshold. This event

is used for the determination of inter-frequency switch for RNC. The compression

mode needs to be started when UE measures and reports this event.

/2HTQ 2c2cusedNonusedNon +≥

In which:


TNon used 2c b is the absolute threshold of good qality of non-using carrier wave for 2c

event determination (ThreshNoUsedFreq).

H2c is the delay parameter of 2c event determination (Hysteresis (Inter)).

4. Event 2D

2D: the quality of working carrier frequency is lower than a threshold. This event

measures the signal quality of current using carrier frequency, which doesn’t need to

start compression mode. However, this event is used for triggering event of 2A/2B/2C

measurement by starting compression mode.

/2HTQ 2d2dUsedUsed −≤

In which:


83

QUsed is the measuring result of current using carrier wave.

TUsed 2b is the absolute threshold of bad qality of using carrier wave for 2d event

determination (ThreshUsedFreq).

H2b is the delay parameter of 2d event determination (Hysteresis (Inter)).

5. Event 2E

2E: the quality of non-working carrier frequency is lower than a threshold. This event

is used for judging signal quality of non-working carrier frequency, which can be used

as the triggering event of triggering intersystem switch.

/2HTQ 2e2eusedNonusedNon −≤

In which:


TNon used 2e is the absolute threshold of good qality of non-using carrier wave for 2e

event determination (ThreshNoUsedFreq)

H2e is the delay parameter of 2e event determination (Hysteresis).

6. Event 2F

2F: the quality of working carrier frequency is higher than a threshold. This event

measures the signal quality of current using carrier frequency, which doesn’t need to

start compression mode. However, this event is used for triggering event of closing

compression mode when the current started compression mode measures 2A/2B/2C.

/2HTQ 2f2fUsedUsed +≥

In which:

QUsed is the measuring result of current using carrier wave.

TUsed 2f is the absolute threshold of bad qality of using carrier wave for 2f event

determination (ThreshUsedFreq).

Hfe is the delay parameter of 2f event determination (Hysteresis (Inter)).

Introduction to compression mode:

There are two methods for the generation of compression mode frame:

1. Halving of SF


84

The halving of SF is fulfilled through enlarging the empty bandwidth of traffic. In this

way, part of the slot time in the same radio frame can be specially used for measuring

inter-frequency and intersystem and part of the slot time can be specially used for data

bit transmission. The transmission strategy of SF halving is generally used for the

traffic with high requirement for time delay and minimal guarantee demand for data

rate, such as the PS data traffic of CS and S.

2. High-level scheduling

The substance of high-level scheduling is that the high-level regulates the rate of data

transmission. Part of the slot time in the same radio frame can be specially used for

measuring inter-frequency and intersystem and part of the slot time can be specially

used for data bit transmission on condition that the empty bandwidth doesn’t change. It

is generally used for non-real-time traffic with low requirement for time delay, such as

the PS data traffic of I/B.

The GAP used for sending/receiving (measurement) can be placed in one radio frame

or between two radio frames when the compression mode is started. It is shown in the

figure below:

#14#Nfirst-1(1) Single-frame method

(2) Double-frame method

First radio frame Second radio frame

Radio frameTransmission gap

Transmission gap

#0

#14

#Nlast+1

#Nfirst-1 #Nlast+1#0

Position of transmission gap (TG)

Sequence of compression mode:


85

Transmission

gap 2

TGSN

TGL2

TG pattern 1 #TGPRC

gap 1 Transmission

TGD

TGPL1

TG pattern 1

TGL1

#1 #2 #3 #4 #5

TG pattern 1TG pattern 1 TG pattern 1 TG pattern 1 TG pattern 1

Absolute Threshold of the Quality of the Currently Used Frequency for 2B/2D/2F

3GPP Name Threshold used frequency


Field Name ThreshUsedFreq[MAX_INTER_MEAS_EVENT]

Description

This parameter indicates the absolute threshold (for quality

determination of the current carrier frequency) configured for

event 2b/2d/2f.

MAX_INTER_MEAS_EVENT represents the maximum

number of the inter-frequency measure events. The value is 6.


GUI Element Name Absolute Threshold for Quality Determination of the Used

Carrier Frequency in Event 2b/2d/2f

Value Range CPICH RSCP: (-115..-25 ) dBm step 1dBm

CPICH Ec/No: (-24..0) dB step 1dB

Default Value

Periodic report parameter for the CPICH Ec/No measure: -

UE intra-frequency event report parameter for the CPICH

Ec/No measure: [-24, -13, -24, -13, -24, -5] B

UE periodic event report parameter for the CPICH RSCP

measure: -

UE intra-frequency event report parameter for the CPICH RSCP

measure: [-115, -95, -115, -95, -115, -80] dBm



Recommended

Configuration

This parameter is determined in view of movement continuity

and guarantee of subscriber experience. In case that the carrier

frequency is bad, compression mode and intra-frequency


86

3GPP Name Threshold used frequency

measurement should be started for switching to avoid call drop

or poor QoS.

For event 2B (smaller than the threshold), the greater the

parameter value is, the easier intra-frequency switching is

triggered; the smaller the parameter value is, the harder

intra-frequency switching is triggered.

For event 2D (smaller than the threshold), the greater the

parameter value is, the easier compression mode is started for

intra-frequency and inter-system measurement; the smaller the

parameter value is, the harder compression mode is started.

For event 2F (greater than the threshold), the greater the

parameter value is, the harder compression mode is closed to

stop intra-frequency and inter-system measurement; the smaller

the parameter value is, the easier compression mode is closed to

stop intra-frequency and inter-system measurement.

Weight of the Currently Used Frequency for 2A/2B/2D/2F

3GPP Name W used frequency


Field Name Wused[MAX_INTER_MEAS_EVENT]

Description

This parameter is used for quality determination of the current

used carrier frequency, and indicates the weight (for event 2a,

2b, 2d, or 2f) of the RNC with best signal quality. It is

associated with the measure and event type.




GUI Element Name Weight of the Currently Used Frequency for 2A/2B/2D/2F

Value Range (0.0..2.0 ) step 0.1

Default Value



Ec/No measure: [0.0, 0.0, 0.0, 0.0, 0.0, 0.0]


measure: -


measure: [0.0, 0.0, 0.0, 0.0, 0.0, 0.0]




87

3GPP Name W used frequency

Recommended

Configuration -

Hysteresis



Field Name Hysteresis[MAX_INTER_MEAS_EVENT]

Description





change in case of a small change. This parameter varies with the

event and can be set to different values.




GUI Element Name Hysteresis

Value Range (0, 0.5..14.5) dB step 0.5dB

Default Value



Ec/No measure: [4, 4, 4, 4, 4, 4] dB


measure: -


measure: [4, 4, 4, 4, 4, 4]dB



Recommended

Configuration

The greater the parameter value is, the harder event

2A/2B/2C/2D/2E/2F is triggered; the smaller the parameter

value is, the easier event 2A/2B/2C/2D/2E/2F is triggered

Time to Trigger



Field Name TrigTime[MAX_INTER_MEAS_EVENT]

Description





88


triggering the event is always satisfied during the trigger period

indicated by the parameter. The larger the value is, the stricter

the trigger of the event is determined. However, the time length

should be set according to the actual requirement. This is

because a larger time affects the communication quality.




GUI Element Name Time to Trigger

Value Range (0, 10, 20, 40, 60, 80, 100, 120, 160, 200, 240, 320, 640, 1280,

2560, 5000) ms

Default Value



Ec/No measure: [100, 100, 100, 640, 100, 640]


measure: -


measure: [100, 100, 100, 640, 100, 640]



Recommended

Configuration


event occurrence and event reporting. In other words, during the

preset period, an event that satisfies the triggering of event

2A/2B/2C/2D/2E/2F is reported to UTRAN. This parameter is

determined in view of sudden signal change. If the signal

quality of a cell becomes unstable with great changes, and

therefore the related event is triggered, switching processing

might be invalid in the meantime, and call drop might occur in

case that the situation is serious. To avoid this situation, in the

preset time period, an event is reported to UTRAN only when

the signal quality always meets the requirement. This ensures

the effectiveness of switching. The greater the parameter value

is, the harder event 2A/2B/2C/2D/2E/2F is triggered; the

smaller the parameter value is, the easier event

2A/2B/2C/2D/2E/2F is triggered.

Absolute Threshold of the Quality of the Non-used Frequency for 2A/2B/2C/2E

3GPP Name Threshold non used frequency



89

3GPP Name Threshold non used frequency

Field Name ThreshNoUsedFreq[MAX_INTER_MEAS_EVENT]

Description

This parameter indicates the absolute threshold (for quality

determination of the current unused carrier frequency)

configured for event 2a/2b/2c/2e.




GUI Element Name Absolute Threshold of the Quality of the Non-used Frequency

for 2A/2B/2C/2E

Value Range CPICH RSCP: (-115..-25 )dBm step 1dBm


Default Value



Ec/No measure: [-24, -5, -5, -24, -13, -24] dB


measure: -


measure: [-115, -50, -50, -115, -95, -115] dBm



Recommended

Configuration


and guarantee of subscriber experience. In case that the local

carrier frequency is bad, and the quality of the intra-frequency

neighboring cell satisfies the condition, switching is determined

to avoid call drop or poor QoS.

For event 2B (greater than the threshold), the greater the

parameter value is, the harder intra-frequency switching is

triggered; the smaller the parameter value is, the easier


For event 2C (greater than the threshold), the greater the

parameter value is, the harder intra-frequency switching is

triggered; the smaller the parameter value is, the easier


For event 2E (smaller than the threshold), the greater the

parameter value is, the easier the intra-frequency measurement

is stopped and inter-system measurement is started; the smaller

the parameter value is, the harder the intra-frequency

measurement is stopped and inter-system measurement is

started.


90

Weight of the Non-used Frequency for 2A/2B/2C/2E

3GPP Name W non-used frequency


Field Name WNoUsed[MAX_INTER_MEAS_EVENT]

Description

This parameter is used for quality determination of the

current unused carrier frequency, and indicates the weight

(for event 2a, 2b, 2c, or 2e) of the RNC with best signal

quality. It is associated with the measure and event type.


number of the inter-frequency measure events. The value is

6.


GUI Element Name Weight of the Non-used Frequency for 2a/2b/2c/2e

Value Range (0.0..2.0 ) step 0.1

Default Value



Ec/No measure: [0.0, 0.0, 0.0, 0.0, 0.0, 0.0]


measure: -


RSCP measure: [0.0, 0.0, 0.0, 0.0, 0.0, 0.0]



Recommended

Configuration -

7.3 Basic principle of intersystem switch

The intersystem refers to that UE switches to another radio access system from one

radio access system. It focuses on that UE switches to GERAN system from UTRAN

access system (switching GERAN system to UTRAN system is the policy of GERAN

system). The purpose of intersystem is to ensure the service continuity and load sharing.

Ensuring the service continuity is based on the switch of intersystem measurement. The

load sharing of intersystem is based on the blind switch of coverage or inclusion

relation. The background of intersystem switch triggered by load sharing includes load

balancing and load control.

The definition and handling process of event for intersystem switch are as follows:


91

1. Event 3A

3A: the quality of current used UTRAN carrier frequency is lower than a threshold and

the quality of other radio system is higher than a threshold. It is used for the

determination of intersystem switch.

/2HTQ 3aUsedUsed −≤ And /2HTCIOM 3aRATOtherRATOtherRATOther +≥+

In which:

QUsed is the quality evaluation of operating frequency for UTRAN.

TUsed is the absolute threshold of current operating frequency (Thresh).

H3a is the delay parameter of 3A event determination (Hysteresis (Rat)).

MOther RAT is the quality measuring result of other systems.

CIOOther RAT is the quality offset of other system cells (CellIndivOffset(gsmRelation)).

TOther RAT the absolute threshold of good qality for other systems (ThreshSys).

2. Event 3C

3C: the quality of other radio systems is higher than a threshold, which can be used for

the determination of intersystem.

/2HTCIOM 3cRATOtherRATOtherRATOther +≥+

In which:

MOther RAT is the quality measuring result of other systems.

CIOOther RAT is the quality offset of other system cells (CellIndivOffset (gsmRelation)).

TOther RAT the absolute threshold of good qality for other systems (ThreshSys).

H3c is the delay parameter of 3C event determination (Hysteresis (Rat)).

In the event determination of intersystem, when the carrier wave meets the reporting

range or threshold of certain event, the event can be reported by the meeting of lasting

a period of time (TrigTime (Rat)) in order to avoid the intra-frequency event

misdeclaration caused by fluctuation of carrier wave quality.

Absolute Threshold of the Quality of UTRAN Cell for 3A

3GPP Name Threshold own system



92

3GPP Name Threshold own system

Field Name Thresh[MAX_RAT_MEAS_EVENT]

Description

This parameter indicates the absolute threshold that needs to

be configured for the quality of the UTRAN cell in the event

that the UE determines event 3a. The value range and unit are

associated with the measure of the UTRAN cell.

MAX_RAT_MEAS_EVENT represents the maximum number

of the inter-system measure events. The value is 4.


GUI Element Name Absolute Threshold of the Quality of UTRAN Cell for 3a

Value Range CPICH RSCP: (-115..-25 )dBm step 1dBm


Default Value

Periodic report parameter for the CPICH Ec/No local system

measure: -

UE event report parameter for the CPICH Ec/No local system

measure: [-6, -24, -24, -24]

Periodic report parameter for the CPICH RSCP local system

measure: -

UE event report parameter for the CPICH RSCP local system

measure: [-95, -115, -115, -115]


Function Handover Control (Inter-RAT Handover)

Recommended

Configuration



carrier frequency is bad, and the measured quality of the

inter-system neighboring cell is better, inter-system switching

should be carried out to avoid call drop or poor QoS.

The greater the parameter value is, the easier inter-system

switching is triggered; the smaller the parameter value is, the

harder inter-system switching is triggered.

Weight of the UTRAN System for 3A

3GPP Name W


Field Name W[MAX_RAT_MEAS_EVENT]

Description

This parameter is used for quality determination of the quality

of the UTRAN system in inter-system measurement, and

indicates the weight of the best cell in the determination of

event 3a.


93

3GPP Name W




GUI Element Name Weight of the UTRAN System for 3a

Value Range (0.0..2.0) step 0.1

Default Value


measure: -


measure: [0, -, -, -]


measure: -


measure: [0, -, -, -]



Recommended

Configuration -

Absolute Threshold of the Quality of Other RAT for 3A/3B/3C

3GPP Name Threshold other system


Field Name ThreshSys[MAX_RAT_MEAS_EVENT]

Description

This parameter indicates the absolute threshold configured for

event 3a/3b/3c for determination of the quality of other

systems. The value range and unit are related to the

measurement amount of other system cell. Currently, the

measure can only be GSM Carrier RSSI of the GSM system,

corresponding to CPICH RSCP of the system. Therefore, the

value range and unit of the parameter correspond to CPICH

RSCP.




GUI Element Name Absolute Threshold of the Quality of Other RAT for 3a/3b/3c

Value Range CPICH RSCP: (-115..-25 ) dBm step 1dBm


Default Value Periodic report parameter for the CPICH Ec/No local system

measure: -


94

3GPP Name Threshold other system


measure: [-90, -95, -95, -115] dBm


measure: -


measure: [-90, -95, -95, -115] dBm



Recommended

Configuration



carrier frequency is bad, and the measured quality of the

inter-system neighboring cell is better, inter-system switching

should be carried out to avoid call drop or poor QoS.

For event 3A/3C, the greater the parameter value is, the harder

inter-system switching is triggered; the smaller the parameter

value is, the easier inter-system switching is triggered.

Determination Hysteresis

3GPP Name Determination Hysteresis


Field Name Hysteresis[MAX_RAT_MEAS_EVENT]

Description





change in case of a small change.

The greater the Hysteresis value is, the greater the threshold


state of an event is.

This parameter is associated with the measure and event type.




GUI Element Name Determination Hysteresis

Value Range (0, 0.5..7.5) dB step 0.5dB

Default Value


measure: -



95

3GPP Name Determination Hysteresis

measure: [4, 4, 2, 4] dB


measure: -


measure: [4, 4, 4, 4] dB



Recommended

Configuration

The greater the parameter value is, the harder event 3A/3C is

triggered; the smaller the parameter value is, the easier event

3A/3C is triggered.

Time Difference Between Event Occurrence and Event Reporting (Time to

Trigger)



Field Name TrigTime [MAX_RAT_MEAS_EVENT]

Description




triggering the event is satisfied during the trigger period

indicated by the parameter.

MAX_RAT_MEAS_EVENT is the maximum number of

inter-system events. The value is 4.


GUI Element Name Time Difference Between Event Occurrence and Event

Reporting

Value Range (0, 10, 20, 40, 60, 80, 100, 120, 160, 200, 240, 320, 640, 1280,

2560, 5000) ms

Default Value


measure: -


measure: [100, 100, 100, 100] ms


measure: -


measure: [100, 100, 100, 100] ms




96


Recommended

Configuration

This parameter is determined in view of sudden signal change.

If the signal quality of a cell becomes unstable with great

changes, and therefore the related event is triggered, switching

processing might be invalid in the meantime, and call drop

might occur in case that the situation is serious. To avoid this

situation, in the preset time period, an event is reported to

UTRAN only when the signal quality always meets the

requirement. This ensures the effectiveness of switching.

202364829 zte umts radio parameter

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