System Information 2 Analysis by Asad Zaidi

System Information Type 2

Time: 19:50:47.38

Frame number: 1070651

Read from ARFCN

Channel number : (GSM 900) 65 BCCH frequency

L2 pseudo length : 22

Skip indicator : 0 A RR message with SKIP indicator 0 cannot be ignored

Message type : 26

Neighbour Cell Description

EXT IND : (0) The information element carries the complete BA

BA IND : 1

Bitmap 0

Channels : 66 67 68 69 70 72 73 76 77 78 79

NCC permitted

NCC permitted values : 4 Param PLMNP: Measurment Reports for only those channel with NCC 4 will be sent

RACH control parameters

Max retransmission : (2) Maximum 4 retransmissions

Tx-integer : (9) 12 slots used Number of slots to spread transmission.For CS calls param is NSLOTS and GPRS GTXINT

Cell bar access : (0) Not barred

Call reestablishment : (1) Not allowed

Access control

Emergency Call allowed : (0) All MSs Param is EC:True

Barred classes : No classes are barred for Access

Message dump:

59 06 1a 10 00 00 00 00 00 79

be 00 00 00 00 00 00 00 00 10

a5 00 00

The L2 Pseudo Length information element indicates the number of octets following it in the message which are to be interpreted in the scope of the phase 1 protocol.

Protocol discriminator : (6) Radio resources management messages

0 0 1 1 Call Control; call related SS messages;0 1 0 1 Mobility Management messages;0 1 1 0 Radio Resource management message

EXT IND = 1 when we are using dual band separate BCCH because then the BA list will be contained in two messages 2 and 2ter or 5 and 5ter

The BA-IND is needed to allow the network to discriminate measurements results related to different BAs sent to the MS.

MAXTERR( See Param) after 4 retransmssions T3126 is started and if no Immidiate assignment is received MS goes into IDLE mode

CELLBARR=FALSE; if barred MS cannot campon or initiate call.however existing calls will continue and handovers can be performed.Once the ongoing calls end cell reselection will occur.

Param is CREALL(call Reestablishment Allowed).In case of Call Drop MS send CM Re-establishment Request instead of CM Service Request.. MSC on receiving the request tries to re assign Radio resource to MS before B party disconnects or timers goes out. The new resourse may belong to new BTS.

System Information Type 3Time: 19:07:48.56Frame number: 511742

Read from ARFCN Channel number : (GSM 900) 78L2 pseudo length : 18Skip indicator : 0Protocol discriminator : (6) Radio resources management messagesMessage type : 27Cell identity (CI) : 57813 (Hex 0xE1D5)Location Area Identification Mobile country code (MCC) : 410 Mobile network code (MNC) : 06 Location area code (LAC) : 301 (Hex 0x012D)Control channel description MSCR : (0) MSC is Release '98 or older Attach/detach allowed (ATT) : (1) YES

BS-AG-BLKS-RES : 1 CCCH-CONF : (0) 1 basic physical channel used for CCCH, not combined with SDCCHs BS-PA-MFRMS : 4 multiframes period T3212 timeout value : 20Cell options (BCCH) Power control indicator (PWRC) : (0) Not set DTX indicator : (1) The MSs shall use uplink discontinuous transmission RADIO-LINK-TIMEOUT : 20Cell selection parameters

CELL-RESELECT-HYSTERESIS : 4 dB Rxlev hysteresis for LA-reselection MS-TXPWR-MAX-CCH : 5 ADDITIONAL RESELECT PARAM IND (ACS) : (0) Spare

HALF RATE SUPPORT (NECI) : (1) New establishment causes are supported RXLEV-ACCESS-MIN : 8RACH control parameters Max retransmission : (2) Maximum 4 retransmissions Tx-integer : (9) 12 slots used Cell bar access : (0) Not barred

Call reestablishment : (1) Not allowed Access control Emergency Call allowed : (0) All MSs Barred classes : Rest octets Selection Parameters

cbq : 0 Cell reselection offset : (0) 0 dB Temporary offset : (0) 0 dB Penalty time : (0) 20 s System Information 2ter indicator - Not Available Early classmark sending control - Explicity accepted BCCH scheduling is not sent in SI9 GPRS indicator

RA color : 0 SI13 position : (0) SI13 message is sent on BCCH Norm Neither UTRAN nor CDMA2000 classmark change message shall be sent with the Early classmark sending SI2QInd SI2 Quater Position : (1) SI2 quater message is sent on BCCH Ext

Message dump: 49 06 1b e1 d5 14 f0 60 01 2d 48 02 14 14 45 48 a5 00 00 80 00 00 1b

ARFCN No

Message type: RR

CI

CGI Components complete CGI will be MCC-MNC-LAC-CI (410-06-301-57813)

MSC Software Release

MS Attach/Dettach Allowed on Cell

Separate BCCH-SDCCH configuration used

No of paging groups set thorugh param NFRAMEPG. Currently in Karachi we are using 6 Pag groups and other places 4.

Timer for PERIODIC LOCATION UPDATE .Unit is 6 Min (Siemens)means here 20 x 6 = 120 Min (2 Hours)

If BS Power Control is Enabled this indicator is set to 1

Uplink Discontinuous Transmission is enabled

param is RDLNKTO. Decremented by 1 for each SAACH not decoded and increamented by 4 for each SAACH decoded

This is set to 5 for GSM cells and 0 for DCS cells. MS-TRXPWR-MAX-CCH = P (Power capabilty of mobile) for our network.

RXLEVAMI (Param name) Minimum Level at which MS is allowed to Initiate call on a cell = -110+RxlevAMI (In this case -102 dBm)

MAXTERR( See Param) after 4 retransmssions T3126 is started and if no Immidiate assignment is received MS goes in IDLE mode

Emergency Calls are allowed for all classes 1 to 4

No Barred Classes on the Cell

On downlink Paging and AGCH is sharing CCCH. We can dedicate certain blocks for AGCH by Parameter NBLKACGR.Paging has priority over Access Grant so if there are pagings in the queue they will be sent first. To cope with this we dedicate some TS for AGCH.

CellResh(Param Name).If the serving cell and neighboring cell belongs to different Loc Areas than reselection will only take place if C1 of neighbouring cell exceeds that of the serving cell by Cell Resh atleast.

New Establishment Cause Indicator: 0 means all GSM phase 1 causes supported 1:means all GSM phase 2 causes also supported.eg in phase 1 causes are not very detailed(HR request in case of direct retry)

param is CREALL(call Reestablishment Allowed).In case of CDR MS send CM Reestablishment Request instead of CM Service Request.. MSC on receiving the request tries to re assign Radio resource to MS before B party disconnects or timers goes out. The new resourse may belong to new BTS.

CRESSOFF: C2 =C1 +CressOFF we have given CRESSOFF=0(G900 Cells) CRESSOFF=10 (G1800 cells)

For the period of PENTIME C2=C1+CRESSOFF-TEMPOFF.This TEMPOFF is used for avoiding ping pong cell reselection

PENTIME difines the time for which TEMPOFF is applicable

SI13 is GPRS related info can be placed on BCCH or PBCCH if present. In our case no PBCCH is available

Cell Bar Qualifier. Used to define priority during cell selection/reselection. A cell of lower priority will be selected only if no suitable cell of higher priority is available. Used in Hierarchial cell Structure.For this Param CellPari = 1

Routing Area Color:Since RA is unique with in LAC but there colud be multiple RA with same CODE in a PLMN. To identify them we use RA Color Code(1 to 7). In our network we are not using it.

System Information Type 4Time: 19:50:46.91Frame number: 1070549

Read from ARFCN Channel number : (GSM 900) 65

L2 pseudo length : 12Skip indicator : 0

Protocol discriminator : (6) Radio resources management messagesMessage type : 28Location Area Identification Mobile country code (MCC) : 410 Mobile network code (MNC) : 06 Location area code (LAC) : 301 (Hex 0x012D)Cell selection parameters

CELL-RESELECT-HYSTERESIS : 4 dB Rxlev hysteresis for LA-reselection

MS-TXPWR-MAX-CCH : 5 ADDITIONAL RESELECT PARAM IND (ACS) : (0) The SI 4 rest octets, if present, shall beused to derive the value of PI and possiblyC2 parameters and/or other parameters

HALF RATE SUPPORT (NECI) : (1) New establishment causes are supported

RXLEV-ACCESS-MIN : 8RACH control parameters

Max retransmission : (2) Maximum 4 retransmissions Tx-integer : (9) 12 slots used

Cell bar access : (0) Not barred

Call reestablishment : (1) Not allowed Access control Emergency Call allowed : (0) All MSs Barred classes : Rest octets Selection Parameters

cbq : 0

Cell reselection offset : (0) 0 dB

Temporary offset : (0) 0 dB Penalty time : (0) 20 s

GPRS indicator

RA color : 0

SI13 position : (0) SI13 message is sent on BCCH Norm Additional parameters are not sent in SYSTEM INFORMATION TYPE 7 and 8

Message dump: 31 06 1c 14 f0 60 01 2d 45 48 a5 00 00 80 00 43 2b 2b 2b 2b 2b 2b 2b

BCCH frequency

A RR message with SKIPindicator 0 cannot be ignored

CGI Components complete CGI will be MCC-MNC-LAC-CI (410-06-301-57813)

Number of slots to spread transmission.For CS calls param is NSLOTST and GPRS GTXINT

Emergency Calls are allowed for all classes 1 to 4

No Barred Classes on the Cell

CRESSOFF: C2 =C1 +CressOFF we have given CRESSOFF=0(G900 Cells) CRESSOFF=10 (G1800 cells)

PENTIME difines the time for which TEMPOFF is applicable

The L2 Pseudo Length information element indicates the number of octets following it in the message which are to be interpreted in the scope of the phase 1 protocol.

0 0 1 1 Call Control; call related SS messages;0 1 0 1 Mobility Management messages;0 1 1 0 Radio Resource management message

CellResh(Param Name).If the serving cell and neighboring cell belongs to different Loc Areas than reselection will only take place if C1 of neighbouring cell exceeds that of the serving cell by Cell Resh atleast.

This is set to 5 for GSM cells and 0 for DCS cells. MS-TRXPWR-MAX-CCH = P (Power capabilty of mobile) for our network.

New Establishment Cause Indicator: 0 means all GSM phase 1 causes supported 1:means all GSM phase 2 causes also supported.eg in phase 1 causes are not very detailed(HR request in case of direct retry)

RXLEVAMI (Param name) Minimum Level at which MS is allowed to Initiate call on a cell = -110+RxlevAMI (In this case -102 dBm)

MAXTERR( See Param) after 4 retransmssions T3126 is started and if no Immidiate assignment is received MS goes in IDLE mode

CELLBARR=FALSE; if barred MS cannot campon or initiate call.however existing calls will continue and honadovers can be performed.Once the ongoing calls end cell reselection will occur

param is CREALL(call Reestablishment Allowed).In case of CDR MS send CM Reestablishment Request instead of CM Service Request.. MSC on receiving the request tries to re assign Radio resource to MS before B party disconnects or timers goes out. The new resourse may belong to new BTS.

Cell Bar Qualifier. Used to define priority during cell selection/reselection. A cell of lower priority will be selected only if no suitable cell of higher priority is available. Used in Hierarchial cell Structure.For this Param CellPari = 1

For the period of PENTIME C2=C1+CRESSOFF-TEMPOFF.This TEMPOFF is used for avoiding ping pong cell reselection

SI13 is GPRS related info can be placed on BCCH or PBCCH if present. In our case no PBCCH is available

Routing Area Color:Since RA is unique with in LAC but there colud be multiple RA with same CODE in a PLMN. To identify them we use RA Color Code(1 to 7). In our network we are not using it.

System Information Type 5Time: 19:50:48.05Frame number: 1070797

Skip indicator : 0

Protocol discriminator : (6) Radio resources management messagesMessage type : 29Neighbour Cell Description

EXT IND : (0) The information element carries the complete BA

BA IND : 0 Bitmap 0 Channels : 66 67 68 69 70 72 73 76 77 78 79

Message dump: 06 1d 00 00 00 00 00 00 79 be 00 00 00 00 00 00 00 00

A RR message with SKIPindicator 0 cannot be ignored

0 0 1 1 Call Control; call related SS messages;0 1 0 1 Mobility Management messages;0 1 1 0 Radio Resource management message

EXT IND = 1 when we are using dual band separate BCCH bc then the BA list will be contained in two messages 2 and 2ter or 5 and 5ter

The BA-IND is needed to allow the network to discriminate measurements results related to different BAs sent to the MS.

System Information Type 6Time: 19:50:48.52Frame number: 1070899

Skip indicator : 0Protocol discriminator : (6) Radio resources management messagesMessage type : 30Cell identity (CI) : 57811 (Hex 0xE1D3)Location Area Identification Mobile country code (MCC) : 410 Mobile network code (MNC) : 06 Location area code (LAC) : 301 (Hex 0x012D)Cell options (SACCH) Power control indicator (PWRC) : (0) Not set DTX indicator : The MS shall use uplink discontinuous transmission on a TCH/F. The MS shall not use uplink discontinuous transmission on a TCH/H. RADIO-LINK-TIMEOUT : 20NCC permitted NCC permitted values : 4 Rest octets No PCH/NCH info No VBS/VGCS options DTM not supported Band indication 1800

Message dump: 06 1e e1 d3 14 f0 60 01 2d 14 10 2b 2b 2b 2b 2b 2b 2b

System Information Type 13Time: 04:31:50.59Frame number: 275612

Read from ARFCN Channel number : (GSM 900) 64L2 pseudo length : 0Skip indicator : 0Protocol discriminator : (6) Radio resources management messagesMessage type : 0Rest octets BCCH CHANGE MARK : 5 SI CHANGE FIELD : (0) Update of unspecified SI message or SI messages PBCCH not present in cell Routing area code (RAC) : 203

PRIORITY ACCESS THR : (6) Packet access is allowed for priority level 1 to 4

NETWORK CONTROL ORDER : (0) NC0: MS controlled cell re-selection, no measurement reporting GPRS cell options NMO : (0) Network mode of operation I

DRX TIMER MAX : (7) 64 s

ACCESS BURST TYPE : (0) 8 bit access burst shall be used CONTROL ACK TYPE : (0) Default format is 4 access bursts BS CV MAX : 15 PAN DEC : 2 PAN INC : 2

PAN MAX : Maximum value allowed for counter N3102 is 20 Extension information EGPRS support : (0) EGPRS not supported in this cell PFC_FEATURE_MODE : (0) The network does not support packet flow context procedures. DTM_SUPPORT : (0) The cell does not support DTM procedures. BSS_PAGING_COORDINATION : (0) The cell does not support CS paging co-ordination. GPRS power control parameters

T AVG W : 15 T AVG T : 5 PC MEAS CHAN : (0) Downlink measurements for power control shall be made on BCCH

N AVG I : 10 SGSNR : (0) SGSN R98 or older

Message dump: 01 06 00 d0 32 d8 38 e7 d2 90 c0 de 55 4b 2b 2b 2b 2b 2b 2b 2b 2b 2b

SPGC CCCH SUP : (0) SPLIT PG CYCLE is not supported on CCCH in this cell

T3168 : (7) 4000 milliseconds T3192 : (0) 500 milliseconds

Alpha : (3) 0.3

BCCH Frequency

In case of DRX Enabled SPLIT PG CYCLE tells the period bw two paging for same MS.If disabled NFRAMEPG will be considered

NMO1: During packet data transfer MS listens on PPCH for CS related Paging

MS wait equal to this timer after sending packet resource request on PRACH for response from network

After data transfer for a particular TBF has been completed this timer starts and MS release all resources on Expiry

This is the max time MS can ask for Non _DRX mode once coming in Idle mode after Packet trasnfer mode

Parameter CACKTYP:In BR7 we have only this option.

tells the value of timer T3198 at MS side. Expressed in terms of RLC blocks. Some thing related to ACK/NACK procedure

If T3182 is expired the MS decrement N3102 by PAN DEC and request Uplink Resource Again.

this parameter defines the number of increment for counter N3102 performed after receiving packet uplink ACK/NACK

Edge Enabled/Disabled in Cell

PCMCH= BCCH or PDCH. MS will measure downlink RxLev on BCCH to calculate uplink Power Control(Value of C)

SGSN software version

In BR8 we can select NCO3 which means network controlled cell resellection.NCO2 means MS controlled cell selection but measurment report sent on Uplink

Access Burst Type 0 means 8 Bit Access Burst and 1 means 11 Bit Access Burst. If during RACH,PRACH only MS class and Priority has to be sent Access Burst 8 is used

this parameter defines the maximum value for counter N3102. If N3102 exceeds PKTNMA or N3102 reach 0 or less than 0, a RLC abnormal release shall be performed(cell Reselection)

Power control of MS on PCH is calculated by formula Pch= min (GAMMA0 - GAMMAch - ALPHA * (C+48), Pmax)

T_Averaging_Weight: this attribute indicates the signal strength filter period for power control in packet idle mode

T_Averaging_Time: this attribute indicates the signal strength filter period for power control in packet Packet Transfer Mode

No of Averaging Interfernce.the MS shall measure the interference signal strength of all eight channels (slots) on the same carrier as the assigned PDCHs.