8.3.21 Secondary UL Frequency Update [FDD]

25.4333GPPRelease 17TSUTRAN Iub interface Node B Application Part (NBAP) signalling

8.3.21.1 General

The purpose of this procedure is to inform the CRNC about updates to activation state of the secondary UL frequency of the UE in Dual Cell E-DCH operation or change the activation state of the secondary UL frequency of the UE in Dual Cell E-DCH operation when E-DCH decoupling is configured.

8.3.21.2 Successful Operation

Figure 48B: Secondary UL Frequency Update procedure

The Secondary UL Frequency Update procedure is initiated by the Node B by sending the SECONDARY UL FREQUENCY UPDATE INDICATION message to the CRNC. The message shall use the Communication Control Port assigned to the concerned Node B Communication Context.

If the Node B needs to update the local activation state of the Secondary uplink frequency of the UE in Dual Cell E-DCH operation, the Node B shall send SECONDARY UL FREQUENCY UPDATE INDICATION message and include the Activation Information IE.

8.3.21.3 Abnormal Conditions

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