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2G/GSM

System Information Type 13

This system information carries the information about GPRS implying that it is broadcasted only in GPRS / EGPRS capable cells (If it is broadcasted in non GPRS cells, it would be regarded as an unknown message on UE). This message is sent on the BCCH if indicated in at least one of the SYSTEM INFORMATIONTYPE 3, 4, 7 or 8 messages.

Example 01 >

GSM CCCH - System Information Type 13

L2 Pseudo Length

0000 00.. = L2 Pseudo Length value: 0

.... 0110 = Protocol discriminator: Radio Resources Management messages (0x6)

0000 .... = Skip Indicator: No indication of selected PLMN (0)

Message Type: System Information Type 13

SI 13 Rest Octets

H... .... = SI13 contents: Present

.010 .... = BCCH Change Mark: 2

.... 0000 = SI Change Field: Update of unspecified SI message or SI messages (0)

0... .... = SI13 Change Mark: Not Present

.0.. .... = PBCCH: Not Present In Cell

..10 0000 00.. .... = RAC: 128

..0. .... = SPGC CCCH Sup: SPLIT_PG_CYCLE is not supported on CCCH in this cell

...1 10.. = Priority Access Thr: Packet access is allowed for priority level 1 to 4 (6)

.... ..00 = Network Control Order: NC0 (0)

GPRS Cell Options

01.. .... = NMO: Network Mode of Operation II (1)

..01 1... = T3168: 2000 ms (3)

.... .010 = T3192: 1500 ms (2)

000. .... = DRX Timer Max: 0 s (0)

...0 .... = Access Burst Type: 8-bit format shall be used

.... 1... = Control Ack Type: Default format is RLC/MAC control block

.... .100 0... .... = BS CV Max: 8

.0.. .... = PAN bits: Not Present

..1. .... = Optional Extensions: Present

GPRS Cell Options Extension Information

Extension Length: 8

.1.. .... = EGPRS: Supported by cell

..1. .... = EGPRS Packet Channel Request: Use two phase packet access with PACKET CHANNEL REQUEST message for uplink TBF establishment on the PRACH

...1 000. = BEP Period: 15 (8)

.... ...0 = PFC Feature Mode: The network does not support packet flow context procedures

0... .... = DTM Support: The cell does not support DTM procedures

.0.. .... = BSS Paging Coordination: The cell does not support Circuit-Switched paging coordination

GPRS Power Control Parameters

..00 00.. = Alpha: 0.0 (0)

.... ..00 000. .... = T Avg W: 2^(0/2) / 6 multiframes (0)

...0 0000 = T Avg T: 2^(0/2) / 6 multiframes (0)

0... .... = PC Meas Chan: Downlink measurements for power control shall be made on BCCH

.000 1... = N Avg I: 2^(1/2) (1)

.... .H.. = Additions in R99: Present

.... ..1. = SGSNR: SGSN is Release '99 onwards

.... ...L = Additions in Rel-4: Not Present

Padding Bits: default padding

Example 02> DTM Support