zte umts access control

UMTS Access Control

ZTE University

Content

UMTS System Information Broadcasting UMTS Paging UMTS Random Access UMTS RRC Connection Setup and Release Access Failed Case

System Broadcasting

The system information broadcasted over the BCH channel mainly includes the following contents:

Public Land Mobile Network (PLMN) ID, location area (LA), route area (RA)

Information on the timers and counters related to the Radio Resource Control (RRC) connections

Configuration information of the UTRAN registration area (URA) Cell selection and reselection parameters Parameters for configuring the common channels, such as FACH,

PCH, and RACH Information on the uplink interference related to the auxiliary power

control UE measurement control message over the idle or common

channel Parameters of the adjacent cell

System information

Master information block (MIB) Schedule block (SB) System information block (SIB) ZTE UTRAN supports SIB1, SIB2, SIB3, SIB5, SIB7,

SIB11, SIB11bis, SIB18.MIB

SB1/SB2

SIB1 SIB2 SIB3/4 SIB5/6 SIB7 SIB11/12

SIB15 SIB18

Level 1 Information blocks scheduled by MIB: SB, SIB1, SIB2, SIB3, SIB5, SIB7

Level 2 Information blocks scheduled by SB1: SIB11, SIB18

Scheduling levels of the SIBS

Broadcast interval of level 2 >= broadcast interval of level 1

SIB BlockSIB Content Controlled by

SIB1 the CN information, UE behavior related timers and counters

RNC

SIB2 URA ID of a cell RNCSIB3/4 cell selection and cell reselection RNCSIB5/6 common transport channels and

common physical channelsRNC

SIB7 parameters needed in the calculation of the PRACH preamble power

RNC/NodeB

SIB11/12 cell measurement control information. RNCSIB 11bis Compensation of SIB 11 RNCSIB 15 Information for location service RNCSIB 18 the PLMN tag of neighbor cell RNC

System broadcastingSRNC

System information broadcast

UE NodeB

system information broadcast scheduler

DRNC

Paging（PAGING TYPE1）

SYSTEM INFORMATION CHANGE INDICATIONRRC RRC

Condition：informing UE of CELL_FACH that system information changed

Condition：informing UE of idle, CELL_PCH、URA_PCH that system information changed

SYSTEM INFORMATION UPDATE REQUEST

SYSTEM INFORMATION UPDATE RESPONSE

SIB1

SIB1 mainly contains the CN information, UE behavior related timers and counters.

T300 N300 T312Idle N312Idle T302 N302 T304 N304 T305 T307 T308 N308 T309 T312 Connected

N312Connected T313 N313 N315 T314 T315 T316 T317 T3212Cs ATTIndCs NMOPs Kcs Kps

SIB2

SIB2 specifies the URA ID of a cell. With SIB2, the UE in the URA_PCH state can update the URA.

Parameter Name Parameter DescriptionURANum Number of UTRAN registration areasURA[4] ID of a UTRAN registration area

SIB3/SIB4

Parameters in SIB3 and SIB4 are related to the cell selection and cell reselection. SIB3 contains information required by the UE in Idle mode. SIB4 contains information required by the UE in Connected. If SIB4 is not sent, the UE in Connected mode can also receive SIB3.

SIB3/SIB4Parameter Name Parameter DescriptionCid Cell IDQualMeas Measurement Quantity for Cell Selection and ReselectionSIntraSearchPre Sintrasearch Configuration TagSIntraSearch The threshold that triggers the intra-frequency measurement in the cell reselection

processSInterSearchPre Sintersearch Configuration TagSInterSearch The threshold that triggers the inter-frequency measurement in the cell reselection

processSSearchHCS Pre SsearchHCS Configuration TagSSearchHCS The threshold that triggers the measurement in the HCS cell reselection processSSearchRat The threshold that triggers the inter-system measurement in the cell reselection

processSHCSRatPre SHCS,RAT Configuration TagSHCSRat The threshold that triggers the inter-system measurement in the HCS cell reselection

processSLimitRat The threshold that triggers the inter-system cell measurement in the cell reselection

processQQualMin The minimum cell quality requirement levelQRxLevMin The minimum cell receive electrical level thresholdDltaQRxLevMinPr DeltaQrxlevmin Configuration TagDltaQRxLevMin The minimum cell receive electrical level threshold increment

SIB5/SIB6

SIB5 and SIB6 are mainly used to configure the common transport channels and common physical channels. SIB5 contains the parameters of the auxiliary common control channels in IDEL mode; SIB6 contains the parameters of the common physical channels or shared physical channels in connected mode. The UE in Idle mode uses SIB5; the UE in connected mode uses SIB6. If SIB6 does not exist, the UE in the connected mode also uses SIB5.

SIB5/SIB6Parameter Name Parameter Description

TfsIndex

Transmission format index. It is used to indicate the attributes of a transport channel, including channel type, transport format number, number of transport blocks, transport block size, transmission time interval, coding rate, rate matching attribute.

ChType Channel TypeTfNum Transport Format NumberTrBlkNum Number of Transport BlocksRlcSize Transport Block SizeTTI Transmission Time IntervalCodingRate Coding RateRateMatchAttr Rate Matching AttributeCRCSize CRC SizeNiNumPerFrame Number of NI per FrameCPCId Common Physical Channel IDMichPwr Power(dB)MichChCode Channelisation Code No.

SIB5/SIB6Parameter Name Parameter Description

SttdInd STTD IndicatorSttdInd AICH STTD IndicatorChCode AICH Channelisation Code No.AichTranTime AICH Transmission TimingAichPwr AICH PowerMplexPos Multiplexing PositionPCHInd Indicator for SCCPCH Carrying PCHDlScraCode SCPICH Scrambling CodeChCode SCPICH Channelisation Code NoChCode PICH Channelisation Code No.SttdInd PICH STTD IndicatorCPCId Pich Common Physical Channel IDPichPwr PICH PowerSttdInd PCCPCH STTD IndicatorSignature Available SignatureAvailSubChanNum PRACH Available Subchannel NumberAvailableSF PRACH Available SF

SIB5/SIB6Parameter Name Parameter DescriptionPreamScraCode PRACH Preamble Scrambling CodePcpichPwr P-CPICH Power(dBm)PunctLimit Puncturing LimitSignalFach FACH Usage

TfcsIndex Index of a transmission format combination set. It must be configured for S-CCPCH or PRACH.

CtfcNumNumber of transmission format combination sets. It must be configured for S-CCPCH or PRACH.

CtfcID of a transmission format combination. It must be configured for S-CCPCH or PRACH.

SCCPCHUsage SCCPCH UsageSccpchOffset SCCPCH Frame Timing OffsetSttdInd SCCPCH STTD IndicatorDlScraCode S-CCPCH Scrambling CodeDlChCodeNo S-CCPCH Channelisation Code No.SlotFmt S-CCPCH Slot FormatSttdInd P-CPICH STTD Indicator

SIB7

SIB7 is the system information block that is updated periodically. The timer of SIB7 is calculated as follows:

Expiration timer = MAX(32,SIB_REP * ExpirationTimeFactor) SIB_REP is the transmission interval of SIB7 and is obtained at the

time of broadcast scheduling; ExpirationTimeFactor is the timeout factor of SIB7 and is set to 2 invariably.

SIB7 contains the parameters needed in the calculation of the PRACH preamble power.

Parameter Name Parameter DescriptionDynPstLevelInit Initial Dynamic Persistence Level

SIB11/SIB12

SIB11/SIB12 is used to configure cell measurement control information. SIB11 specifies the measurement control information required by the UE in Idle mode. SIB12 specifies the measurement control information required by the UE in FACH state. If SIB12 is not broadcasted, the UE in connected mode can also use the configuration information specified by SIB11.

SIB18

SIB18 specifies the PLMN tag that must be considered by the UE in Idle or connected mode.

Parameter Name Parameter DescriptionNMCC Mobile Country Code of Neighboring CellNMNC Mobile Network Code of Neighboring Cell

SIB11bis

The content of SIB11bis is same with SIB11, it can alleviate the lack of SIB11 space when there is too many adjacent cells.

Parameter Name Parameter DescriptionSIB11ORSIB11BIS Specify if an adjacent cell information can be

broadcast through SIB11bis

Waiting Time After UE Sending RRC CONNECTION SETUP REQUEST MessageParameter Name T300Description The timer is started after the UE sends the RRC

CONNECTION REQUEST message. The T300 timer is stopped when the message RRC CONNECTION SETUP is received, when the timer expires and the retransmit event count is smaller than N300, the UE retransmits the RRC CONNECTION SETUP REQUEST message.

Range and Step （ 100 ， 200 ， 400 ， 600 ， 800 ， 1000 ， 1200 ， 1400 ，1600 ， 1800 ， 2000 ， 3000 ， 4000 ， 6000 ， 8000 ） ms

Default Value 2000ms

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->UE Timers and Constants Infomation ->Waiting Time After UE Sending RRC CONNECTION SETUP REQUEST Message(T300)(ms)

Maximum Number of Retransmissions of the RRC CONNECTION REQUEST MessageParameter Name N300Description If the T300 timer expires and the retransmit event count is

equal to or larger than N300 but the RRC CONNECTION SETUP message has not been received, the UE enters the Idle mode.

Range and Step ［ 0 ， 7 ］Default Value 3

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->UE Timers and Constants Infomation ->Maximum Number of Retransmissions of the RRC CONNECTION REQUEST Message (N300)

Waiting Time for Receiving "In Sync" from L1 in Idle ModeParameter Name T312IdleDescription The timer is started when the UE starts to establish the

dedicated channel. When the UE finds the number of synchronization indications received from layer 1 is equal to N312Idle, the T312 timer is stopped. If the timer expires, the physical channel setup fails.

Range and Step ［ 1 ， 15 ］ s

Default Value 2s

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->UE Timers and Constants Infomation ->Waiting Time for Receiving "In Sync" from L1 in Idle Mode (T312 in Idle Mode)(s)

Maximum Number of "In Sync" Received from L1 in Idle ModeParameter Name N312IdleDescription The smaller the parameter, it is easier to judge whether the

synchronization finishes, but the chance of fake synchronization also increases; the larger the parameter, the higher the reliability, but it is more time consuming.


Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->UE Timers and Constants Infomation ->Maximum Number of "In Sync" Received from L1 in Idle Mode (N312 in Idle Mode)

Waiting Time After UE Sending CELL/URA UPDATE MessageParameter Name T302Description The counter is started when the UE sends the CELL UPDATE

or URA UPDATE message; the counter is stopped when the UE receives the CELL UPDATE CONFIRM or URA UPDATE CONFIRM message. If the counter T302 expires but the number of retransmitted messages is smaller than N302, the UE retransmits the CELL UPDATE or URA UPDATE message.

Range and Step （ 100 ， 200 ， 400 ， 600 ， 800 ， 1000 ， 1200 ， 1400 ，1600 ， 1800 ， 2000 ， 3000 ， 4000 ， 6000 ， 8000 ） ms


Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->UE Timers and Constants Infomation ->Waiting Time After UE Sending CELL/URA UPDATE Message(T302)(ms)

Maximum Number of Retransmissions of the CELL/URA UPDATE MessageParameter Name N302Description When the T302 counter expires and the number of the CELL

UPDATE or URA UPDATE messages sent by the UE is larger than or equal to N302, the UE enters the Idle mode.


Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->UE Timers and Constants Infomation ->Maximum Number of Retransmissions of the CELL/URA UPDATE Message (N302)

Waiting Time After UE Sending UE CAPABILITY INFORMATION MessageParameter Name T304Description When the UE sends the UE CAPABILITY INFORMATION

message, the timer is started; when the UE receives the UE CAPABILITY INFORMATION Confirmed message, the timer is stopped. When the T304 timer expires and the number of the CAPABILITY INFORMATION messages sent by the UE is smaller than N304, the UE retransmits the UE CAPABILITY INFORMATION message.

Range and Step （ 100 ， 200 ， 400 ， 1000 ， 2000 ） ms


Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->UE Timers and Constants Infomation ->Waiting Time After UE Sending UE CAPABILITY INFORMATION Message(T304) (ms)

Maximum Number of Retransmissions of the UE CAPABILITY INFORMATION Message Parameter Name N304Description When the T304 counter expires and the retransmit event

count is equal to or larger than N304, the UE starts the CELL UPDATE process.


Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->UE Timers and Constants Infomation ->Maximum Number of Retransmissions of the UE CAPABILITY INFORMATION Message (N304)

Period of Cell/URA Update When UE is in CELL_FACH/CELL_PCH/ URA_PCH StateParameter Name T305Description The T305 timer is started when the UE enters the

CELL_FACH, or CELL_PCH/URA_PCH state. When the UE receives the CELL UPDATE CONFIRM or URA UPDATE CONFIRM message, the T305 timer is stopped. When the T305 timer expires and the UE detects its own serving cell, the UE sends the CELL UPDATE message; when the T305 timer expires and the UE is not in the serving cell, it starts the T307 timer.

Range and Step （ no update ， 5 ， 10 ， 30 ， 60 ， 120 ， 360 ， 720 ） min

Default Value 5min

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->UE Timers and Constants Infomation -> Period of Cell/URA Update When UE is in CELL_FACH/CELL_PCH/ URA_PCH State(T305)(min)

Waiting Time for Cell Reselection After UE is out of ServiceParameter Name T307Description The parameter specifies the waiting time between the time

when the UE leaves the serving cell and the time when the UE reselects the cell. The smaller the parameter, more quickly the UE can reenter the network, but this may increase the load of the UE and the system.

Range and Step （ 5 ， 10 ， 15 ， 20 ， 30 ， 40 ， 50 ） s

Default Value 5s

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->UE Timers and Constants Infomation ->Waiting Time for Cell Reselection After UE is out of Service(T307)(s)

Waiting Time After Sending RRC CONNECTION RELEASE COMPLETE Message in CELL_DCH StateParameter Name T308Description The T308 timer is started after the UE sends the RRC

CONNECTION RELEASE COMPLETE message. When the T308 timer expires and the number of the RRC CONNECTION RELEASE COMPLETE messages sent by the UE is smaller than N308, the UE retransmits the RRC CONNECTION RELEASE COMPLETE message.

Range and Step （ 40 ， 80 ， 160 ， 320 ） ms

Default Value 80ms

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->UE Timers and Constants Infomation ->Waiting Time After Sending RRC CONNECTION RELEASE COMPLETE Message in CELL_DCH State(T308) (ms)

Maximum Number of Retransmissions of the RRC CONNECTION RELEASE MessageParameter Name N308Description When the T308 counter expires and the number of the RRC

CONNECTION RELEASE COMPLETE messages sent by the UE is larger than or equal to N308, the UE enters the Idle mode.


Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->RNC Radio Resource Management -> Maximum Number of Retransmissions of the RRC CONNECTION RELEASE Message(N308)

Waiting Time After Requesting Connection Establishment in Other System(eg. GSM) Parameter Name T309Description When the UE receives the CELL CHANGE ORDER FROM

UTRAN message, the T309 timer is started; when the UE in the new cell successfully receives the response to the connection setup request, the T309 timer is stopped. If the T309 timer expires, the UE returns to the original UTRAN.


Default Value 8s

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->UE Timers and Constants Infomation ->Waiting Time After Requesting Connection Establishment in Other System(eg. GSM) (T309)(s)

Waiting Time for Receiving “In Sync” from L1 In Connected ModeParameter Name T312ConnectedDescription The timer is started when the UE starts to establish the

dedicated channel. When the UE finds the number of synchronization indications received from layer 1 is equal to N312, T312 is stopped. If the T312 timer expires, the physical channel setup fails.


Default Value 1s

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->UE Timers and Constants Infomation ->Waiting Time for Receiving “In Sync” from L1 In Connected Mode(T312 in Connected Mode)(s)

Maximum Number of "In Sync" Received from L1 in Connected ModeParameter Name N312ConnectedDescription The smaller the parameter, it is easier to judge whether the


Range and Step （ 1 ， 2 ， 4 ， 10 ， 20 ， 50 ， 100 ， 200 ， 400 ， 600 ， 800 ， 1000 ）

Default Value 1

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->UE Timers and Constants Infomation ->Maximum Number of "In Sync" Received from L1 in Connected Mode (N312 in Connected Mode)

Waiting Time After DPCCH Established in CELL_DCH State Losing SychronizationParameter Name T313Description When the number of synchronization loss indications received

by the UE in the DCH state from layer 1 reaches the value of N313, the UE starts T313. When the UE receives synchronization indications from layer 1 for N315 times, it stops the T313 timer. When the T313 timer expires, the radio links involved in the lost synchronization fail.


Default Value 3s

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->UE Timers and Constants Infomation ->Waiting Time After DPCCH Established in CELL_DCH State Losing Sychronization (T313)(s)

Maximum Number of Successive "Out of Sync" Received from L1Parameter Name N313Description The smaller the parameter, it is easier to judge whether the


Range and Step （ 1 ， 2 ， 4 ， 10 ， 20 ， 50 ， 100 ， 200 ）Default Value 50

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->INFORMATION ON THE CONSTANTS OF THE UE COUNTER AND TIMER ->Maximum Number of Successive "Out of Sync" Received from L1(N313)

Maximum Number of Successive "In Sync" Received from L1 During T313 is ActivatedParameter Name N315Description The smaller the parameter, it is easier to judge whether the


Range and Step （ 1 ， 2 ， 4 ， 10 ， 20 ， 50 ， 100 ， 200 ， 400 ， 600 ， 800 ， 1000 ）

Default Value 1

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->UE Timers and Constants Infomation ->Maximum Number of Successive "In Sync" Received from L1 During T313 is Activated ( N315)

Waiting Time for Completion of Cell Update When Radio Link Fails and Radio Bearer(s) Associated with T314 Exist

Parameter Name T314Description When the criteria for radio link failure are fulfilled, T314 is

started if radio bearer(s) that are associated with T314 exist or if only RRC connection exists only to the CS domain. When the Cell Update procedure has been completed, T314 is stopped.

Range and Step （ 0 ， 2 ， 4 ， 6 ， 8 ， 12 ， 16 ， 20 ） s

Default Value 4s

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->UE Timers and Constants Infomation ->Waiting Time for Completion of Cell Upate When Radio Link Fails and Radio Bearer(s) Associated with T314 Exist (T314)(s)

Waiting Time for Completion of Cell Update When Radio Link Fails and Radio Bearer(s) Associated with T315 Exist

Parameter Name T315Description When the RB is set up, the system uses T314 or T315 for the

RB. When the radio link fails and the current RB uses T315, the system starts T315. When the cell updating process finishes, the system stops T315.

Range and Step （ 0 ， 10 ， 30 ， 60 ， 180 ， 600 ， 1200 ， 1800 ） s

Default Value 30s

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->UE Timers and Constants Infomation ->Waiting Time for Completion of Cell Upate When Radio Link Fails and Radio Bearer(s) Associated with T315 Exist (T315)(s)

Waiting Time for Cell Selection/Reselection After UE is out of Service in CELL_PCH/URA_PCH StateParameter Name T316Description When the UE in the PCH state leaves the serving cell, the

system starts the T316 timer; when the UE detects the serving cell, the system stops the T316 timer. When the T316 timer expires, if the UE is in the serving cell, it initiates the cell updating; if the T316 timer is not in the serving cell, it starts the T317 timer and switches to the FACH state. When the UE detects the serving cell, it starts the cell updating.

Range and Step （ 0 ， 10 ， 20 ， 30 ， 40 ， 50 ， Infinity ） s

Default Value 0s

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->UE Timers and Constants Infomation -> Waiting Time for Cell Selection/Reselection After UE is out of Service in CELL_PCH/URA_PCH State(T316)(s)

Waiting Time for Cell Selection/Reselection After UE is out of Service in CELL_FACH StateParameter Name T317Description When the T316 timer expires, the system starts the T317

timer; when the UE in the FACH leaves the serving cell, the system starts the T317 timer. When the UE detects the serving cell, it stops the T317 timer.

Range and Step （ 0 ， 10 ， 30 ， 60 ， 180 ， 600 ， 1200 ， 1800 ） s

Default Value 0s

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->UE Timers and Constants Infomation ->Waiting Time for Cell Selection/Reselection After UE is out of Service in CELL_FACH State(T317)(s)

Mobile Country Code

Parameter Name MCCDescription The parameter specifies the mobile country code.


Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->CN NAS Configuration Information ->Mobile Country Code

Mobile Network Code

Parameter Name MNCDescription The parameter specifies the mobile network code.

Range and Step ［ 0 ， 999 ］Default Value

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->CN NAS Configuration Infomation->Mobile Network Code

CN Domain Supported

Parameter Name CnDomainDescription The parameter specifies the supported CN domains.

Range and Step 0: CS Domain1: PS Domain2: CS+PS

Default Value 2: CS+PS

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->CN NAS Configuration Infomation ->CN Domain Supported

Timer for Periodic Location Update

Parameter Name T3212CsDescription The parameter specifies the interval at which the location

information is reported. The smaller the parameter, it is easier to judge the real location.

Range and Step （ 0 ， 25.5 ） hours Step0.1hour

Default Value 1 hour

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->CN System Infomation ->Timer for Periodic Location Update(T3212)(hour)

URA Number

Parameter Name URANumDescription The parameter specifies the number of URAs for the current

cell. The system supports up to 4 URAs.

Range and Step ［ 1 ， 4 ］Default Value N/A

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->UtranCell->UtranCell Global Information ->URA Number

URA Identity

Parameter Name URA ［ 4］Description The parameter specifies the No. of the URA to which the

current area belongs.


Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->UtranCell->UtranCell Global Information ->URA Identity

Cell Identity

Parameter Name CIdDescription The parameter specifies the ID of a cell and is used to

distinguish different cells.


Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->UtranCell->UtranCell Global Information ->Cell Identity

Content


Paging FlowSRNC CNUE

Condition：PAGING originated by CN

NodeB DRNC

Condition：PAGING originated by RNC

Condition：PAGING originated by RNC , on Iur interface

PAGING

PAGING TYPE 1

PAGING TYPE 2

Condition：UE in IDLE，PCH

Condition：UE in DCH，FACH

PAGING REQ

PAGING TYPE 1

PAGING TYPE 2

Condition：UE in IDLE，PCH

Condition：UE in DCH，FACH

PAGING TYPE 1

When the UE is in the Idle, or URA_PCH state, the RNC receives the paging message from the CN and then sends the paging message of PAGING TYPE 1 over the PCH channel to the UE. To improve the chance of receiving the paging message by the UE, the RNC repeatedly sends the paging message of PAGING TYPE 1 to the UE.

Page Indicator

The PCH channel has a corresponding PICH physical channel. The page indicator (PI) is transmitted over the PICH channel, with each PI corresponding to a group of UEs. The following lists the formula for calculating the PI:

PI = DRX Index mod Np Where: DRX Index = IMSI div 8192 Np = the number of PIs included in a PICH frame.

Page Indicator

The UE judges whether the network is paging itself by monitoring its own PI. Each PICH frame can contain the PI of multiple UEs. The more the parameter Np, the larger the transmit power of the PICH will be.

b1b0

288 bits for paging indication12 bits (transmission

off)

One radio frame (10 ms)

b287 b288 b299

Number of PIs in each frame

Number of repeated bits in the PICH

Transmit power of the PICH in comparison with that of the CPICH

18 16 -736 8 -772 4 -5144 2 -2

Paging Occasion

For saving power, the UE in the Idle or PCH state monitors the PICH channel in the Discontinuous Reception (DRX) mode. In the DRX mode, the UE monitors the PI once every DRX period. That is, each UE has its own paging occasion (PO). The UE monitors each PICH frame in the corresponding SFN and finds its own PI in the frame according to the calculated PI. Therefore, the RNC fills in the PI in the message transmitted over the PICH channel according to the paging occasion of the UE. DRX period = 2k frames

Paging Occasion

Paging Occasion = {(IMSI div N) mod (DRX cycle length div PBP)} * PBP + n * DRX cycle length + Frame Offset

Where: N = number of SCCPCH channels carried over the PCH in a cell DRX cycle length = 2k frame PBP = 1 n = SFN

DRX Cycle

PI PI PI PI PI PI…… ……

0 1 i-1 i+1i Np-1

0 2K-1 4095

PO

DRX cycle length coefficient

When the UE is in the Idle mode, the RNC calculates K in the DRX period according to Kcs, Kps, and DRX Cycle Length Coefficient in the paging message from the CN.

For paging messages from the CS domain, K = Min(Kcs,Kps) For paging messages from the PS domain, if the CN adds DRX

Cycle Length Coefficient to the paging message, K = Min (Kcs, Kps, DRX Cycle Length Coefficient).If the CN does not add DRX Cycle Length Coefficient to the paging message, K = Min(Kcs,Kps).

DRX cycle length coefficient

When the UE is in the PCH state, the RNC calculates K in the DRX period according to Kcs, Kps, KUtran, and DRX Cycle Length Coefficient in the paging message from the CN.

For paging messages from the CS domain, K = Min(Kcs,KUtran) For paging messages from the PS domain, if the CN adds DRX

Cycle Length Coefficient to the paging message, K = Min (Kps, KUtran, DRX Cycle Length Coefficient). If the CN does not add DRX Cycle Length Coefficient to the paging message, K = Min(Kps,KUtran).

System Information

RRC Connection Setup

NAS Connection

RRC Connection Release

Called Signaling Flow

PAGING TYPE 2

When the UE is in the DCH or FACH state, the UTRAN initiates the paging process and sends a paging message of PAGING TYPE 2 over the DCCH channel. The UTRAN configures paging cause in the message. After the UE in the DCH or FACH state receives the message of PAGING TYPE 2, it starts the paging reception process and reports paging cause and paging record type identifier to the upper layer.

Paging Area

CellUMTS

Registration Area

Routing Area

Location Area

CN

Different paging area for UE in different RRC state

Cell_DCHCell_FACH Idle mode

URA_PCH

UTRAN DRX Cycle Length Coefficient

Parameter Name KUtranDescription This parameter is used for the discontinuous reception of UE

in the connection mode. This parameter is used to calculate the paging occasion, that is, a constant required in monitoring the PICH cycle. The discontinuous reception cycle is 2k frames.


View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->RNC Radio Resource Management ->UTRAN DRX Cycle Length Coefficient

Sending Times of Paging Message

Parameter Name PagingSendTimesDescription The system has not obtained the information on the number of

retransmitted paging message when receiving no response. If the value of this parameter increases, the possibility of paging success will increase. With the increase of the Uu interface messages, the Uu interface becomes more time consuming.


View->Configuration Management->RNC NE->RNC Radio Resource Management->UtranCell->Advanced Parameter Manage ->UtranCell ->Sending Times of Paging Message

CS Domain DRX Cycle Length Coefficient

Parameter Name KcsDescription The parameter allows a UE in the Idle or PCH state to

calculate the paging occasion so that it can monitor the PICH channel at the time specified by the parameter.


Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage -> CN System Infomation ->CS Domain DRX Cycle Length Coefficient

PS Domain DRX Cycle Length Coefficient

Parameter Name KpsDescription The parameter allows a UE in the Idle or PCH state to

calculate the paging occasion so that it can monitor the PICH channel at the time specified by the parameter.


Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage -> CN System Infomation ->PS Domain DRX Cycle Length Coefficient

Number of Paging Indicators per PICH Frame

Parameter Name NpDescription The larger the parameter, the higher the paging success rate,

but the larger the transmit power of the PICH channel.

Range and Step （ 18 ， 36 ， 72 ， 144 ）Default Value 18

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->UtranCell->Advanced Parameter Manage ->PICH ->Number of Paging Indicators per PICH Frame

PICH Power

Parameter Name PichPwrDescription This parameter indicates the PICH transmission power, which

is an offset relative to the Primary CPICH power.

Range and Step ［ -10 ， 5 ］ dB step 1dB

Default Value -7dB

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage -> Power Control not Related to Service -> PICH Power

Content


PRACH Structure

Message partPreamble

4096 chips10 ms (one radio frame)

Preamble Preamble

Message partPreamble

4096 chips 20 ms (two radio frames)

Preamble Preamble

Preamble Part

The preamble part of PRACH is 4096 chips long. It is obtained by repeating the 16-chip signature for 256 times and then processed with RPACH preamble scrambling.

Message Part

k=0, 1, 2 and 3 corresponds respectively to the spectrum spreading factors adopted by the message part: SF=256, 128, 64 and 32.

Pilot Npilot bits

DataNdata bits

Slot #0 Slot #1 Slot #i Slot #14

Tslot = 2560 chips, 10*2k bits (k=0..3)

Message part radio frame TRACH = 10 ms

Data

ControlTFCI

NTFCI bits

Channelized code of PRACH message part

The spectrum spreading code used by the control part of PRACH is cc = Cch,256,m. where m = 16×s + 15.

The spectrum spreading code used by the data part of PRACH is cd =Cch,SF,m. where SF=256, 128, 64, 32 are the spectrum spreading factor of the data part, m = SF×s/16.

s(0 s 15) is the serial number of the signature used by the PRACH preamble part among all 16 PRACH preamble signatures.

Number of bits carried in PRACH message vs spectrum spreading factor:

Slot Format #i

Channel Bit Rate (kbps)

Channel Symbol Rate (ksps)

SF Bits/ Frame

Bits/ Slot

Ndata

0 15 15 256 150 10 101 30 30 128 300 20 202 60 60 64 600 40 403 120 120 32 1200 80 80

Random Access Process of Physical Layer

Select an available access slot Select a signature Set the preamble retransmission counter The UE calculates the initial transmit power of preamble If the UE fails to receive, in the DL access slot corresponding to the

slot that sends the UL access preamble, the positive or negative response (AI = +1 nor –1) corresponding to the selected signature on AICH, Increase the transmit power of random access preamble by one PRStep.

If the UE receives, in the DL access slot corresponding to the slot that sends the UL access preamble, the positive response corresponding to the selected signature on AICH, then the UE sends the message part of random access.

RACH access slot set

PRACH has totally 15 slots of 20ms and the slots belongs to two access slot sets.

Access slot set 1 includes: slot 0~7 starting from p-a chips before the DL P-CCPCH frame of SFN mod 2=0.

Access slot set 2 includes: slot 8~14 starting from p-a–2560 chips before the DL P-CCPCH frame of SFN mod 2=1.

AICH access slots

10 ms

#0 #1 #2 #3 #14 #13 #12 #11 #10 #9 #8 #7 #6 #5 #4 p-a

#0 #1 #2 #3 #14 #13 #12 #11 #10 #9 #8 #7 #6 #5 #4

PRACH access slots

SFN mod 2 = 0 SFN mod 2 = 1

10 ms

Access slot set 1 Access slot set 2

RACH Sub-channel

RACH sub-channel defines a subset of all UL access slots. Mapping relation between available UL access slot and

RACH sub-channel:

SFN modulo 8 of corresponding P-CCPCH frame

Sub-channel number

0 1 2 3 4 5 6 7 8 9 10 11

0 0 1 2 3 4 5 6 71 12 13 14 8 9 10 112 0 1 2 3 4 5 6 73 9 10 11 12 13 14 84 6 7 0 1 2 3 4 55 8 9 10 11 12 13 146 3 4 5 6 7 0 1 27 8 9 10 11 12 13 14

PRACH/AICH timing relation

The AICH frame is 20ms long and divided into 15 slots, each slot with 5120 chips.

One access slot

p-a

p-m

p-p

Pre-amble

Pre-amble Message part

Acq.Ind.AICH access

slots RX at UE

PRACH accessslots TX at UE

PRACH Preamble Scrambling Code

Parameter Name PreamScraCodeDescription This parameter indicates the preamble scrambling number

that this PRACH can use. The scrambling code that can be used for PRACH in each cell relates to the DL primary scrambling code of the cell. In addition, there are at most sixteen preamble scrambling codes available. This parameter can be used to distinguish the PRACHs.


Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->External UTRAN Cell-> External UTRAN Cell XXX-> Advanced Parameter Manager->PRACH-> PRACH Preamble Scrambling Code

Available Signature

Parameter Name SignatureDescription This parameter indicates all effective signatures when the

PRACH is used. 16 bit represents 16 signatures; the bit which equals 1 means the corresponding signature is valid. Each signature corresponds one by one to the channelization code number of PRACH whose SF is 16.

Range and Step Bit0: sig0..Bit15: sig15,Bit=1 means the corresponding signature is valid.

Default Value Each bit is 1

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->External UTRAN Cell-> External UTRAN Cell XXX-> Advanced Parameter Manager->PRACH-> Available Signature

PRACH Available SF

Parameter Name AvailableSFDescription This parameter indicates the minimum effective spreading

factor that this PRACH can use (limiting the maximum rate that the PRACH can transmit). The greater the minimum effective spreading factor is, the lower the maximum rate becomes at which the PRACH can transmit.

Range and Step （ 32 ， 64 ， 128 ， 256 ）Default Value 64

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management-> UTRAN Cell-> Advanced Parameter Manager->PRACH-> PRACH Available SF

PRACH Preamble Power Ramp Step

Parameter Name PRStepDescription This parameter indicates the power ramp step used by the UE

when it does not receive any responses from AICH after sending a preamble. This parameter is used to be added to the previous power, and then the next preamble is sent at this new power.

Range and Step ［ 1 ， 8 ］ dB step 1dB

Default Value 1dB

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management-> UTRAN Cell-> Advanced Parameter Manager->PRACH-> PRACH Preamble Power Ramp Step(dB)

Maximum Number of Preamble Being TransmittedParameter Name MaxPreamRetransDescription This parameter indicates the maximum number that the

access preamble can be sent before L1 receives ACK or NACK.


Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management-> UTRAN Cell-> Advanced Parameter Manager->PRACH-> Maximum Number of Preamble Being Transmitted

Power Offset between PRACH Control Part and PRACH Data PartParameter Name POPpmDescription This parameter indicates the power offset between control part

of the PRACH message part and the last preamble. It should be configured for each TFC.

Range and Step ［ -5,10 ］ dB step 1dB

Default Value 2

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management-> Advanced Parameter Manager->Transmission Format Composition Set of PRACH-> Power Offset between PRACH Control Part and PRACH Data Part(dB)

PRACH Available SubChannel Number

Parameter Name AvailSubChanNumDescription This parameter indicates the available effective sub-channel

number of this PRACH. The sub-channel number actually defines the available time slot for the PRACH. The bit indicates whether this sub-channel number is valid or not. Each sub-channel number can correspond to several access slots. For several PRACHs in the same cell, their sub-channel numbers must be different from each other.

Range and Step bit0: subch0..bit11: subch11Bit=1 means the corresponding sub channel is valid.

Default Value Each bit is 1

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management-> UTRAN Cell-> UTRAN Cell XXX-> Advanced Parameter Manager->PRACH-> PRACH Available SubChannel Number

Maximum Allowed UL TX Power of RACH

Parameter Name MaxRACHTxPwrDescription This parameter indicates the maximum allowed UL

transmission power of RACH. If the parameter value is increased, the maximum allowed UL transmission power of RACH increases. If the parameter value is decreased, the maximum allowed UL transmission power of RACH decreases.

Range and Step ［ -50 ， 33 ］ dBm

Default Value 24dBm

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management-> UTRAN Cell-> UTRAN Cell XXX-> Advanced Parameter Manager->PRACH-> Maximum Allowed UL TX Power of RACH(dBm)

Maximum Number of Preamble Ramping CyclesParameter Name MmaxDescription This parameter indicates the maximum times for re-sending

attempts on MAC layer. When the physical layer returns NACK (unacknowledged) or NO ACK (Node B does not response), adds the attempt times, M, by 1. When M is over Mmax, the MAC layer stops the access process. When the parameter value is increased, the MAC layer makes more sending attempts. When the parameter value is decreased, the MAC layer makes less sending attempts.


Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management-> UTRAN Cell-> UTRAN Cell XXX-> Advanced Parameter Manager->PRACH-> Maximum Number of Preamble Ramping Cycles

Detected Preamble Threshold

Parameter Name PreamThsDescription This parameter indicates the preamble judgment threshold

when Node B detects preambles. To make the access preamble of the PPRACH transmission be detected by Node B, the proportion of the received preamble power in the preamble cycle and the interference level should be larger than this parameter.

Range and Step ［ -36.0 ， 0.0 ］ dB step 0.5dB

Default Value -24dB

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management-> UTRAN Cell-> UTRAN Cell XXX-> Advanced Parameter Manager->PRACH-> Detected Preamble Threshold(dB)

Content


RRC Connection Setup

A dedicated channel A common channel

UE UTRAN

RRC CONNECTION REQUEST

RRC CONNECTION SETUP

RRC CONNECTION SETUP COMPLETE

The signaling flow in signal trace tool

RRC Connection SetupRNCRRC Connection Setup Request

RNC decides on what kind of channel the RRC connection will be established according to the setting of the OMCR

parameter InitRrcOnDch

RRC Connection Setup Cause = “ to set up services ”

InitRrcOnDch = 1 InitRrcOnDch = 3 InitRrcOnDch = 4InitRrcOnDch = 0 InitRrcOnDch = 2

DCH mandatory and common

signaling

DCH mandatory and High-speed

signaling

Not mandatory and use common

signaling for DCH state

Not mandatory and use high-

speed signaling for DCH state

DCH is used to setup RRC Connection

Common Channel is used to setup RRC Connection

FACH mandatory

Establishing a RRC Connection over a Dedicated Transport channel When receiving the RRC CONNECTION REQUEST

message from a UE, the RNC specifies the channel over which the RRC connection is to be established according to the parameter InitRrcOnDch.

If the parameter InitRrcOnDch is set to 0 (Forced to DCH and Using Normal Speed Signaling) or 1 (Forced to DCH and Using 13.6Kbps signaling), or 5(Forced to DCH and using 27.2Kbps), the RNC establishes the RRC connection over the DCH channel.

If the parameter InitRrcOnDch is set to 3 (Not Forced, Using 3.4Kbps Signaling on Cell-DCH State) or 4 (Not Forced, Using 13.6kbps Signaling on Cell-DCH State), or 6(Not Forced, Using 27.2Kbps Signaling on Cell-DCH State), the RNC selects to establish the RRC connection over the DCH according to the establishment cause in the RRC CONNECTION REQUEST message.

Establishing a RRC Connection over a Common Transport channel When receiving the RRC CONNECTION REQUEST

message from a UE, the RNC specifies the channel over which the RRC connection is to be established according to the parameter InitRrcOnDch.

If the parameter InitRrcOnDch is set to 2 (Forced to FACH), the RNC establishes the RRC connection over the FACH channel.

If the parameter InitRrcOnDch is set to 3 , 4, or 6, the RNC establishes the RRC connection according to the establishment cause. If there is only a signaling process, instead of setting up services(for example, the value of establishment cause is registration ), RNC will select common channel to bear signaling.

Wireless Link Setup Failure

If the radio link setup fails, the RNC sends the RRC CONNECTION REJECT message to the UE and fills in Wait Time in the message. The parameter Wait Time specifies the duration (from the reception of the RRC CONNECTION REJECT message to the time of sending access request) during which the UE has to wait.

Failure to Receive RRC Connection Setup Response From UE If RNC havn’t received RRC CONNECTION

SETUP COMPLETE for waiting 5 seconds from the first transmitting of RRC CONNECTION SETUP, the RRC connection setup fails. The UE is still in idle mode.

Releasing the RRC Connection

The connection carrying services data or NAS signaling is released normally.

The Node B detects radio link failure. The RNC monitors the RLC connection failure. The UE in the DCH or FACH state sends CELL UPDATE message.

The value of AM_RLC error indication is true. The UE in the FACH state sends the CELL UPDATE message to the

RNC. The cause is Radio link failure or RLC unrecoverable error.

UE(DCH) RNCRRC Connection Release

RRC Connection Release Complete

(SRB1)

UE(FACH) RNCRRC Connection Release

RRC Connection Release Complete

(SRB2/CCCH)

(CCCH)

RRC connection release flowSourceNode BUE

RRC RRC CONNECTI ON RELEASE[DCCH（UM RLC）]

TargetNode B

Dri f tRNC

SourceRNC

RRC

RRCRRC CONNECTI ON RELEASE COMPLETE[DCCH（UM RLC / AM RLC）]RRC

Condition：RRC connection release on DCH

RL Del ete

RRCRRC CONNECTI ON RELEASE[CCCH（UM RLC）]RRC

Condition：RRC connection release on CCCH

Maximum Number of Retransmissions of the RRC CONNECTION RELEASE MessageParameter Name NReTranDescription The parameter specifies the number of the RRC

CONNECTION RELEASE messages retransmitted by the RNC after the UE does not return the RRC CONNECTION RELEASE COMPLETE message. If the value of this parameter decreases, the possibility of process failed will increase.


Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->RNC Radio Resource Management ->Maximum Number of Retransmissions of the RRC CONNECTION RELEASE Message

Wait Time for RRC Connection ReestablishmentParameter Name TwaitDescription The smaller the parameter, it is easier to trigger access

request flow, the larger the chance of second failure.


Default Value 5s

Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->Advanced Parameter Manage ->RNC Radio Resource Management ->Wait Time for RRC Connection Reestablishment(s)

Number of FDD UMTS Frequency Range

Parameter Name FDDFreqRngNumDescription This parameter indicates the number of UTRAN FDD

frequency range controlled by the local PLMN. When UE comes back to idle mode from RRC connected mode, UE selects one cell to reside. UTRAN contains this parameter in the message of RRC CONNECTION RELEASE, indicating the possible frequency range in UTRAN cells. This parameter helps UE to speed up the process of cell searching.


Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->RPLMN Range Information -> Number of FDD UMTS Frequency Range

Number of GSM BA Range

Parameter Name GsmBARangeNumDescription This parameter indicates the number of GSM BCCH

distribution tables. When UTRAN network and BSS network belong to the same PLMN at the same time and UE has transferred from RRC connected mode to Idle mode, UE will selects one cell to reside. UTRAN contains this parameter in the message of RRC CONNECTION RELEASE, indicating the possible BCCH frequency range of neighboring GSM cells of the BSS network. This parameter helps UE to speed up the process of cell searching.


Configuration Path

View->Configuration Management->RNC NE->RNC Radio Resource Management->RPLMN Range Information -> Number of GSM BA Range

GSM Lower Range

Parameter Name GsmLRange ［ 32］Description This parameter indicates the frequency lower range of a

specific GSM BCCH distribution table that the local PLMN controls. When UTRAN network and BSS network belong to the same PLMN at the same time and UE has transferred from RRC connected mode to Idle mode, UE will selects one cell to reside. UTRAN contains this parameter in the message of RRC CONNECTION RELEASE, indicating the possible BCCH frequency range of neighboring GSM cells of the BSS network. This parameter helps UE to speed up the process of cell searching.

Range and Step [0 ， 1023]

Default Value N/A

View->Configuration Management->RNC NE->RNC Radio Resource Management->RPLMN Range Information ->GSM Lower Range

GSM Upper Range

Parameter Name GsmURange ［ 32］Description This parameter indicates the frequency upper range of a

specific GSM BCCH distribution table that the local PLMN controls. When UTRAN network and BSS network belong to the same PLMN at the same time and UE has transferred from RRC connected mode to Idle mode, UE will selects one cell to reside. UTRAN contains this parameter in the message of RRC CONNECTION RELEASE, indicating the possible BCCH frequency range of neighboring GSM cells of the BSS network. This parameter helps UE to speed up the process of cell searching.

Range and Step [0 ， 1023]

Default Value N/A

View->Configuration Management->RNC NE->RNC Radio Resource Management->RPLMN Range Information ->GSM Upper Range

UARFCN (Nlow)

Parameter Name Luarfcn ［ 8］Description This parameter indicates the frequency lower range of a

specific UTRAN FDD frequency that the local PLMN controls. When UE state is transferred from RRC connected mode to idle mode, UE selects one cell to reside. UTRAN contains this parameter in the message of RRC CONNECTION RELEASE, indicating the possible transmission frequency range of the UTRAN cells. This parameter helps UE to speed up the process of cell searching.

Range and Step Band I: [10562, 10838]Band II: [9662, 9938]

Default Value N/A

View->Configuration Management->RNC NE->RNC Radio Resource Management->RPLMN Range Information ->UARFCN (Nlow)

UARFCN(Nupper)

Parameter Name Uuarfcn ［ 8］Description This parameter indicates the frequency upper range of a

specific UTRAN FDD that the local PLMN controls. When UE state is transferred from RRC connected mode to idle mode, UE selects one cell to reside. UTRAN contains this parameter in the message of RRC CONNECTION RELEASE, indicating the possible transmission frequency range of the UTRAN cells. This parameter helps UE to speed up the process of cell searching.

Range and Step Band I: [10562, 10838]Band II: [9662, 9938]

Default Value N/A

View->Configuration Management->RNC NE->RNC Radio Resource Management->RPLMN Range Information ->UARFCN(Nupper)

Type of Transport Channel for Initial RRC Connection SetupParameter Name InitRrcOnDchDescription This parameter indicates the type of transport channel and

signaling rate for initial RRC connection setup.

Range and Step 0:forcedly establish the RRC connection over the DCH channel and use the common signaling1: Forcedly establish the RRC connection over the DCH channel and use the high speed signaling2: Forcedly establish the RRC connection over the FACH channel and use the high speed signaling3:Establish the RRC connection over the DCH channel in a non-forced manner and use the common signaling4: Establish the RRC connection over the DCH channel in a non-forced manner and use the high speed signaling.

Default Value 1

View->Configuration Management->RNC NE->RNC Radio Resource Management->Basic Infomation ->Type of Transport Channel for Initial RRC Connection Setup

Content


Description

Customer complained that it was difficult to access the network in office, and it was too long to wait.

Analysis

The drive test shows that the receiving level of UE is normal. Besides, there is no alarm related to hardware.

The Performance Management System(PMS) software of NodeB shows the statistics of accessing. A large amount of rejection of access is found, which occupied the demodulation resource, causing the long time to wait for a call connection.

Analysis

Preamble_Initial_Power = Primary CPICH DL TX power – CPICH_RSCP + UL interference + Constant Value “Primary CPICH DL TX power – CPICH_RSCP” is the

Pathloss of downlink.

UE UTRAN

CPICH

Preamble

AICH

………………..Preamble

Message of PRACH

Analysis

Use the signaling trace tools of OMCR, RNC didn’t receive the “RRC Connection Request” message. Use the BMC TRACE, find “Rach CRC Error”.So, we make a conclusion that the Preamble Threshold is too big which result in the message transmit power is very low, and NodeB cannot receive the message.

Solution

Solution Change the Preamble Threshold:-24dB-21dB Constant Value:-21dB-18dB

Result Test again, make a call 120 times, all the calls are

successful.

Access Failed Case

-21-21dB

-18dB

zte umts access control

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