11.2.25c Packet System Information Type 16

3GPP44.060General Packet Radio Service (GPRS)Mobile Station (MS) - Base Station System (BSS) interfaceRadio Link Control / Medium Access Control (RLC/MAC) protocolRelease 17TS

This message is sent by the network on the PBCCH and the PACCH giving information about Iu mode operation. Special requirements for the transmission of this message apply on the PBCCH, see 3GPP TS 45.002.

This message shall not be segmented across more than one RLC/MAC control block by using the procedures specified in sub-clause 9.1.12a. A consistent set of this message type is required to completely decode the information (see sub-clause 5.5.2.1.4).

Message type: PACKET SYSTEM INFORMATION TYPE 16

Direction: network to mobile station

Classification: distribution message

Table 11.2.25c.1: PSI16 information elements

< PSI16 message content > ::=

< PAGE_MODE : bit (2) >

< PSI16_CHANGE_MARK : bit (2) >

< PSI16_INDEX : bit (3) >

< PSI16_COUNT : bit (3) >

< GRA_ID_LIST : < GRA ID struct > >

< Iu_MODE_NMO_SUPPORT : bit (1) >

< CN_DOMAIN_LIST : bit (2) >

{ < CN_DOMAIN_IDENTITY : < CN Domain Identity IE > >

< CN DOMAIN SPECIFIC DRX CYCLE LENGTH COEFFICIENT :

< CN Domain Specific DRX Cycle Length Coefficient IE > >

} * (1+val(CN_DOMAIN_LIST))

{ 0 | 1 < 3G_LAC : bit (16) > }

{ 0 | 1 < 3G_RAC : bit (8) > }

{ 0 | 1 < GRA_AND CELL UPDATE TIMER : bit (3) > }

< padding bits >

! < Distribution part error : bit (*) = < no string >> ;

< GRA ID struct > ::=

< NUMBER_OF_GRA_IDs : bit (3) >

{ < GRA_ID : bit (16) > } * (1 + val(NUMBER_OF_GRA_IDs));

Table 11.2.25c.2: PSI16 information element details

PAGE_MODE (2 bit field)
This field describes which type of page mode used, i.e. either normal paging, extended paging, paging reorganization or same as before from the previous page mode. The mobile station shall ignore this field if the message is received on the PACCH. Coding of this field is defined in 3GPP TS 44.018

PSI16_CHANGE_MARK (2 bit field)
This field is the binary representation of the PSI change mark parameter identifying a consistent set of PSI16 messages. Range: 0 to 3.

PSI16_INDEX (3 bit field)
The PSI16 index field is used to distinguish individual PSI16 messages. The field can take the binary representation of the values 0 to n, where n is the index of the last PSI16 message. (PSI16 count).
Range: 0 – 7.

PSI16_COUNT (3 bit field)
The PSI16 count field is coded as the binary representation of the last (highest indexed) individual PSI16 message.
Range: 0 – 7.

GERAN Id struct

At least one GRA Id shall be broadcast in each cell. Maximum number is eight.

NUMBER_OF_GRA_IDs (3 bit field)
The NUMBER of GRA Ids field is coded as the binary representation of the amount of GRA IDs sent in an individual PSI16 message.

Range: 0 – 7.

GRA_ID (16 bit field)
The GRA_ID defines the indentity of a GERAN Registration Area Identity to which the cell belongs.

Iu_MODE_NMO_SUPPORT (1 bit field)
This parameter is used for determining network mode of operation for the 3G SGSN and the 3G MSC. The mobile station may assume that the network has set this field equally in all instancies of this message.

Bit
0 Network Mode Operation I
1 Network Mode Operation II

CN_DOMAIN_LIST (2 bit field)
This field is used to repeat information for each CN domain. Range : 0 to MaxCNdomains-1.

CN_DOMAIN_IDENTITY

CN_DOMAIN_SPECIFIC_DRX_CYCLE_LENGTH_COFFICIENT

3G_LAC (16 bit field)
This field is only broadcast if the cell supports Iu mode and if 2G and 3G are using different location area codes. The coding of 3G_LAC is presented in 3GPP TS 23.003.

3G_RAC (8 bit field)
This field is only broadcast if the cell supports Iu mode and if 2G and 3G are using different routing area codes. The coding of 3G_RAC is presented in 3GPP TS 23.003.

GRA_AND_CELL_UPDATE_TIMER (3 bit field)
This field is the binary representation of GRA and CELL UPDATE TIMERs.

bit
3 2 1
0 0 0 5 minutes
0 0 1 10 minutes
0 1 0 30 minutes (default value)
0 1 1 60 minutes
1 0 0 120 minutes
1 0 1 360 minutes
1 1 0 720 minutes
1 1 1 Infinity (no update)