11.2.26 Packet TBF Release

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 on the PACCH by the network to the mobile station to initiate release of an uplink or downlink TBF.

Message type: PACKET TBF RELEASE

Direction: network to mobile station

Classification: non-distribution message

Table 11.2.26.1: Packet TBF RELEASE information elements

< Packet TBF Release message content > ::=

< PAGE_MODE : bit (2) >

{ 0 < GLOBAL_TFI : Global TFI IE >

{ < UPLINK_RELEASE : bit (1) >

< DOWNLINK_RELEASE : bit (1) >

< TBF_RELEASE_CAUSE : bit (4) = { 0000 | 0010 } >

< padding bits >

! < Non-distribution part error : bit (*) = < no string > > }

! < Address information part error : bit (*) = < no string > > }

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

Table 11.2.26.2: Packet TBF RELEASE information element details

PAGE_MODE (2 bit field)
This field is defined in sub-clause 12.20.

Global TFI IE
This information element contains the TFI of the mobile station’s which uplink and/or downlink TBF to be released. This field is defined in sub-clause 12.10.

Uplink_Release (1 bit field)
Downlink_Release (1 bit field)
These fields indicate which TBF shall be release, uplink or downlink. Both directions can be released at the same time.

0 TBF shall not be released
1 TBF shall be released

TBF_RELEASE_CAUSE (4 bit field)
This field indicates the reason for the release of the TBF. This field is encoded according to the following table:

bit
4 3 2 1
0 0 0 0 Normal release
0 0 1 0 Abnormal release
All other values are reserved, the same behaviour in reception as if ‘Abnormal release’.