11.2.3 Packet Cell Change Failure

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 on the PACCH from the mobile station to the network to indicate that a commanded cell change order has failed. For a (3G) multi-RAT mobile station this may be a 3G Cell.

Message type: PACKET CELL CHANGE FAILURE

Direction: mobile station to network

Table 11.2.3.1: PACKET CELL CHANGE FAILURE message content

< Packet Cell Change Failure message content > ::=

< TLLI : bit (32) >

< ARFCN : bit (10) >

< BSIC : bit (6) >

< CAUSE : bit (4) >
{ null | 0 bit ** = < no string > — Receiver compatible with earlier release

| 1 — Additions in release 99 :

{ 0 | 1 < FDD-ARFCN : bit (14) > — 3G UTRAN FDD

< Diversity : bit >

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

< SCRAMBLING_CODE : bit (9) > }

{ 0 | 1 < TDD-ARFCN : bit (14) > — 3G UTRAN TDD

< Diversity : bit >

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

< Cell Parameter : bit (7) >

< Sync Case : bit > }

< padding bits > } ;

Table 11.2.3.2: PACKET CELL CHANGE FAILURE information element details

TLLI (32 bit field)
This field is defined in sub-clause 12.16.

ARFCN (10 bit field)
This field contains the BCH frequency of the new cell on which the failure occurred. This field is encoded as the ARFCN defined in 3GPP TS 04.08.
Range 0 to 1023
If a 3G Cell is indicated, this field shall be sent with the value 0.

BSIC (6 bit field)
This field contains the BSIC of the BCH frequency of the new cell on which the failure occurred. This field is encoded as the BSIC value defined in 3GPP TS 04.08.
Range 0 to 63
If a 3G Cell is indicated, this field shall be sent with the value 0.

CAUSE (4 bit field)
This field indicates the cause of the cell change order failure on the target cell.

bit
4 3 2 1
0 0 0 0 Frequency not implemented
0 0 0 1 No response on target cell
0 0 1 0 Immediate Assign Reject or Packet Access Reject on target cell
0 0 1 1 On going CS connection
0 1 0 1 MS in GMM Standby state
0 1 1 0 Forced to the Standby state
All others Reserved for future use

UTRAN FDD Target cell Description:

FDD_ARFCN (14 bit field)
This information element is defined as the UARFCN in 3GPP TS 25.101.

Diversity (1 bit field)
This parameter indicates the value of the Diversity bit for the cell:
Bit
0 Diversity is not applied for this cell
1 Diversity is applied for this cell.

Bandwidth_FDD (3 bit field)
This information element will be used for future releases. It shall not be sent in this version of the protocol.

Scrambling Codes (9 bit field)
This parameter indicates the Primary Scrambling Code as defined in 3GPP TS 25.331.

UTRAN TDD Target cell Description:

TDD_ARFCN (14 bit field)
This information element is defined as the UARFCN in 3GPP TS 25.102.

Bandwidth_TDD (3 bit field)
This information element refers to 3GPP TS 25.331.
Bit
321
000 3.84Mcps
001 1.28Mcps
All other values shall not be sent.

Diversity (1 bit field)
This parameter indicates the value of the Diversity bit for the cell:
Bit
0 Diversity is not applied for this cell
1 Diversity is applied for this cell.

Cell Parameter (7 bit field)
This parameter is defined in 3GPP TS 25.304.

Sync Case (1 bit field)
This parameter is defined in 3GPP TS 25.304.