8.3.16 Compressed Mode Command [FDD]

25.4233GPPRelease 17TSUTRAN Iur interface Radio Network Subsystem Application Part (RNSAP) signalling

8.3.16.1 General

The Compressed Mode Command procedure is used to activate or deactivate the compressed mode in the DRNS for one UE-UTRAN connection. This procedure shall use the signalling bearer connection for the relevant UE Context.

The Compressed Mode Command procedure shall not be initiated if a Prepared Reconfiguration exists, as defined in subclause 3.1.

8.3.16.2 Successful Operation

Figure 26: Compressed Mode Command procedure, Successful Operation

The procedure is initiated by the SRNC sending a COMPRESSED MODE COMMAND message to the DRNC.

Upon receipt of the COMPRESSED MODE COMMAND message from the SRNC and at the CFN indicated in the CM Configuration Change CFN IE, the DRNS shall deactivate all the ongoing Transmission Gap Pattern Sequences. From that moment on all Transmission Gap Pattern Sequences included in Transmission Gap Pattern Sequence Status IE repetitions (if present) shall be started when the indicated TGCFN IE elapses. The CM Configuration Change CFN IE in the Active Pattern Sequence Information IE and TGCFN IE for each sequence refer to the next coming CFN with that value.

If the values of the CM Configuration Change CFN IE and the TGCFN IE are equal, the concerned Transmission Gap Pattern Sequence shall be started immediately at the CFN with a value equal to the value received in the CM Configuration Change CFN IE.

If the Affected HS-DSCH serving cell List IE is included, the concerned Transmission Gap Pattern Sequence shall be applied to HS-DSCH serving cells associated with C-ID IE included in Affected HS-DSCH serving cell List IE. Otherwise the concerned Transmission Gap Pattern Sequence shall be applied to all the configured serving cells.

If the concerned UE Context is configured to use F-DPCH in the downlink, the DRNS shall ignore, when activating the Transmission Gap Pattern Sequence(s), the downlink compressed mode method information, if existing, for the concerned Transmission Gap Pattern Sequence(s) in the Compressed Mode Configuration.

8.3.16.3 Abnormal Conditions

[FDD – If the Affected HS-DSCH serving cell List IE is included in the Active Pattern Sequence Information IE, and theTransmission Gap Pattern Sequence for affected HS-DSCH Serving Cells is activated on the HS-DSCH Primary Serving Cell but not for all the other serving cells, the DRNS shall initiate the Radio Link Failure procedure with the cause value “Invalid CM Settings”.]