8.3.5 Synchronised Radio Link Reconfiguration Commit

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

8.3.5.1 General

This procedure is used to order the DRNS to switch to the new configuration for the Radio Link(s) within the DRNS, previously prepared by the Synchronised Radio Link Reconfiguration Preparation procedure.

When Mode 1 is used for the fast TTI switching, the procedure shall if supported be used to order the DRNS to execute the TTI switching process.

This procedure shall use the signalling bearer connection for the relevant UE Context.

8.3.5.2 Successful Operation

Figure 12: Synchronised Radio Link Reconfiguration Commit procedure, Successful Operation

[FDD – If the Activation Delay IE is included in the RADIO LINK RECONFIGURATION COMMIT message, the DRNS shall if supported send the HS-SCCH order to execute the TTI switching process according to TS 25.214 [10]. The CFN IE in the RADIO LINK RECONFIGURATION COMMIT message shall be ignored by the DRNS.]

The DRNS shall switch to the new configuration previously prepared by the Synchronised Radio Link Reconfiguration Preparation procedure at the “configuration switching point” occurring:

– [TDD – at the next coming CFN with a value equal to the value requested by the SRNC in the CFN IE (see TS 25.402 [17] subclause 9.4) when receiving the RADIO LINK RECONFIGURATION COMMIT message from the SRNC.]

– [FDD – if the Fast Reconfiguration Mode IE is not included in the RADIO LINK RECONFIGURATION COMMIT message at the next coming CFN with a value equal to the value requested by the SRNC in the CFN IE (see TS 25.402 [17] subclause 9.4) when receiving the RADIO LINK RECONFIGURATION COMMIT message from the SRNC.]

– [FDD – if the Fast Reconfiguration Mode IE is included in the RADIO LINK RECONFIGURATION COMMIT message as soon as the DRNS detects that the UE uses the new configuration in the uplink (e.g. the Node B indicates that the UE uses the new scrambling code used for the uplink by sending the RADIO LINK RESTORATION message). In order to limit the period for the detection in the DRNS the CFN in the RADIO LINK RECONFIGURATION COMMIT message indicates the earliest possible time instant at which the UE might use the new configuration.]

[FDD – If the Active Pattern Sequence Information IE is included in the RADIO LINK RECONFIGURATION COMMIT message, the CM Configuration Change CFN IE in the Active Pattern Sequence Information IE shall be ignored by the DRNS.]

[FDD – If the Active Pattern Sequence Information IE is not included in the RADIO LINK RECONFIGURATION COMMIT message and a new Compressed Mode Configuration exists in the prepared configuration, the DRNS shall behave as if an Active Pattern Sequence Information IE with an empty Transmission Gap Pattern Sequence Status IE was included.]

When this procedure has been completed the Prepared Reconfiguration does not exist any more, see subclause 3.1.

In the case of a Transport Channel or MAC-d flow modification for which a new transport bearer was requested and established, the switch to the new transport bearer shall also take place at the configuration switching point (defined above) indicated CFN.

The detailed frame protocol handling during transport bearer replacement is described in TS 25.427 [4], subclause 5.10.1, and in TS 25.425 [32], subclauses 5.3.1 and 5.3.2.

[FDD – If the RADIO LINK RECONFIGURATION COMMIT includes the Active Pattern Sequence Information IE, the DRNS shall deactivate all the ongoing Transmission Gap Pattern Sequences at the configuration switching point (defined above). From that moment on all Transmission Gap Pattern Sequences included in Transmission Gap Pattern Sequence Status IE repetitions shall be started when the indicated TGCFN IE elapses. The CFN IE and TGCFN IE for each sequence refer to the next coming CFN with that value. If the values of the 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 CFN IE.]

[FDD – If the RADIO LINK RECONFIGURATION COMMIT message includes the Active Pattern Sequence Information IE and 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.]

[FDD – If the RADIO LINK RECONFIGURATION COMMIT message includes the Affected HS-DSCH serving cell List IE in the Active Pattern Sequence Information IE, 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.]

8.3.5.3 Abnormal Conditions

If a new transport bearer is required for the new configuration and it is not available at the requested configuration switching point (defined in sub-clause 8.3.3.2), the DRNS shall initiate the Radio Link Failure procedure.

[FDD – If the Fast Reconfiguration Mode IE is included in the RADIO LINK RECONFIGURATION COMMIT message and the DRNC did not include the Fast ReconfigurationPermission IE in the RADIO LINK RECONFIGURATION READY message, the DRNC shall initiate the Radio Link Failure procedure.]

[FDD – If the RADIO LINK RECONFIGURATION COMMIT message contains the Affected HS-DSCH serving cell List IE 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”.]

[FDD – If the RADIO LINK RECONFIGURATION COMMIT message contains the Activation Delay IE but the Fast TTI switching Mode Requested Synchronized IE is not presented in the RADIO LINK RECONFIGURATION PREPARE or the Mode 1 is not supported, the DRNS shall initiate the Radio Link Failure procedure.]