11.2.21a Packet System Information Type 3 ter

04.603GPPGeneral Packet Radio Service (GPRS)Mobile Station (MS) - Base Station System (BSS) interfaceRadio Link Control / Medium Access Control (RLC/MAC) protocolRelease 1999TS

This message is sent by the network on the PBCCH or PACCH giving information on additional measurement and reporting parameters. 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. If not all information fits into one instance of the PSI3ter message, the PSI3ter message can be repeated. Special requirements for the transmission of this message apply on PBCCH, see 3GPP TS 05.02.

Message type: PACKET SYSTEM INFORMATION TYPE 3 TER

Direction: network to mobile station

Classification: distribution message

Table 11.2.21a.1: PSI3 ter information elements

< PSI3 ter message content > ::=

< PAGE_MODE : bit (2) >

< PSI3_CHANGE_MARK : bit (2) >

< PSI3_TER_INDEX : bit (4) >

< PSI3_TER_COUNT : bit (4) >

{ { 0 | 1 < Real Time Difference Description : < Real Time Difference Description struct >> }

{ 0 | 1 < GPRS REP_PRIORITY Description : < GPRS REP PRIORITY Description struct >> }

< padding bits > } // — truncation at end of message allowed, bits ‘0’ assumed

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

< Real Time Difference Description struct > ::=

{ 0 | 1 { 0 | 1 < Cell_Index_Start_RTD : bit (7) > } –default value=0

< RTD Struct : < RTD6 Struct >>

{ 0 < RTD Struct : < RTD6 Struct >> } **1 } — ‘0’ : increment by 1 the index of the GSM Neighbour Cell list

{ 0 | 1 { 0 | 1 < Cell_Index_Start_RTD : bit (7) > } –default value=0

< RTD Struct : < RTD12 Struct >>

{ 0 < RTD Struct : < RTD12 Struct >> } **1 } ; — ‘0’ : increment by 1 the index of the GSM Neighbour Cell list

< RTD6 Struct > ::=

{ 0 | 1 < RTD : bit (6) > } ; –‘0’ means no RTD for this cell

< RTD12 Struct > ::=

{ 0 | 1 < RTD : bit (12) > } ; — ‘0’ means no RTD for this cell

< GPRS REP PRIORITY Description struct > ::=

< Number_Cells : bit(7) >

{ < REP_PRIORITY : bit > } * (val(Number_Cells)) ;

Table 11.2.21a.2: PSI3 ter information element details

PAGE_MODE (2 bit field)
See description under PSI3.

PSI3_CHANGE_MARK (2 bit field)
See description under PSI3.

PSI3_TER_INDEX (4 bit field)
The PSI3_TER_INDEX field is used to distinguish individual PSI3 bis messages containing information about different neighbour cells. The field can take the binary representation of the values 0 to n, where n is the index of the last PSI3 ter message. (PSI3 ter count).

PSI3_TER_COUNT (4 bit field)
This field is coded as the binary representation of the PSI3 ter index (in the PSI3 ter message) for the last (highest indexed) individual PSI3 ter message.
Range: 0-15.

Real Time Difference Description

Cell_Index_Start_RTD (5 bit field)
This field indicates the GSM Neighbour Cell list index for the first RTD parameter. When missing, the value ‘0’ is assumed.

RTD (6 or 12 bit field) is defined in 3GPP TS 05.08.
The use of these parameters is defined in sub-clause 5.6.3.4.

GPRS REP PRIORITY Description

REP_PRIORITY bit:
0 Normal reporting priority
1 High reporting priority

The use of these bits is defined in sub-clause 5.6.3.5 ("GPRS Report Priority Description").