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

Message type: EC PACKET TBF RELEASE

Direction: network to mobile station

Classification: non-distribution message

Table 11.2.56.1: EC Packet TBF RELEASE information elements

< EC Packet TBF Release message content > ::=

< USED_DL_COVERAGE_CLASS : < Used DL Coverage Class IE >>

{ 0 < GLOBAL_TFI : Global TFI IE >

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

{ 0 | 1 < WAIT_INDICATION : bit (8) >

< WAIT _INDICATION_SIZE : bit (1) > }

< padding bits >

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

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

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

Table 11.2.56.2: EC Packet TBF RELEASE information element details

USED_DL_COVERAGE_CLASS (2 bit field)
This information element is defined in sub-clause 12.71.

Global TFI IE
This information element contains the TFI of uplink or downlink TBF that is to be released. This field is defined in sub-clause 12.10.

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’.

WAIT_INDICATION (8 bit field)
The Wait Indication field indicates the time the mobile station shall wait before attempting another channel request. This field is coded as the binary representation of the T3172 timeout value in units of 20 ms or in units of seconds. The units are indicated in the WAIT_INDICATION_SIZE field.
Range 0 to 255.

WAIT_INDICATION_SIZE (1 bit field)
This field indicates the units of the WAIT_INDICATION field.

0 the WAIT_INDICATION field is coded in units of s
1 the WAIT_INDICATION field is coded in units of 20 ms