8.2.30 MBMS Notification Update

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

8.2.30.1 General

This procedure is used to update the MBMS Notification Indicators to be sent over the MICH.

8.2.30.2 Successful Operation

Figure 27Q: MBMS Notification Update procedure, Successful Operation

The procedure is initiated with an MBMS NOTIFICATION UPDATE COMMAND message sent from the CRNC to the Node B using the Node B Control Port.

The Node B shall use the different NIs in the NI Information IE to generate, as specified in ref. TS 25.211 [7], the notification indicators it shall transmit on the MICH starting at the next coming MICH CFN equal to the value in the MICH CFN IE and for a duration equal to the Modification Period. If the value of MICH CFN IE is the same as the one in a previously received MBMS NOTIFICATION UPDATE COMMAND message, and if the MICH CFN occurrence has not been reached yet, the Node B shall overwrite the value of the NI Information IE in the previously received MBMS NOTIFICATION UPDATE COMMAND message.

If the Modification Period IE is included in the MBMS NOTIFICATION UPDATE COMMAND message, the Node B shall use this as the new Modification Period starting at the next coming MICH CFN equal to the value in the MICH CFN IE. If the value of MICH CFN IE is the same as the one in a previously received MBMS NOTIFICATION UPDATE COMMAND message, and if the MICH CFN occurrence has not been reached yet, the Node B shall overwrite the value of the Modification Period IE in the previously received MBMS NOTIFICATION UPDATE COMMAND message.

If the Modification Period IE is not included in the MBMS NOTIFICATION UPDATE COMMAND message, the Node B shall use the lastest stored Modification Period.

8.2.30.3 Abnormal Conditions

If the Modification Period IE is not included in the MBMS NOTIFICATION UPDATE COMMAND message and no Modification Period is stored in the Node B, the Node B shall initiate the Error Indication procedure.