8.38 MBMS Session Stop

25.4133GPPRelease 17TSUTRAN Iu interface Radio Access Network Application Part (RANAP) signalling

8.38.1 General

The purpose of the MBMS Session Stop procedure is to request the UTRAN to notify UEs about the end of a given MBMS Session and to release the corresponding MBMS RAB and MBMS Iu signalling connection for this MBMS Session. The MBMS RAB Session Stop procedure may also be used as the last MBMS session stop to make the RNC aware that a certain Multicast Service is no longer available. The MBMS Session Stop procedure is triggered by the CN (PS domain).

The procedure uses connection oriented signalling.

8.38.2 Successful Operation

Figure 50: MBMS Session Stop procedure. Successful operation.

The CN initiates the procedure by sending a MBMS SESSION STOP message.

Upon reception of the MBMS SESSION STOP message, the RNC shall release all allocated resources for the MBMS RAB, including the MBMS Iu signalling connection used for this MBMS RAB.

The MBMS SESSION STOP message shall include the MBMS CN De-Registration IE. If the MBMS CN De-Registration IE is set to the value "deregister", the RNC shall also remove all associated MBMS Service Context(s) and release all allocated MBMS resources for the MBMS Bearer Service.

The RNC does not need to wait for the release of all UTRAN radio resources before returning the MBMS SESSION STOP RESPONSE message.

In case of successful release of the MBMS Iu signalling connection, after the MBMS SESSION STOP RESPONSE message has been sent, the CN shall not send further RANAP connection-oriented messages on this particular connection.

Transmission and reception of a MBMS SESSION STOP RESPONSE message terminate the procedure in the UTRAN and in the CN respectively.

8.38.3 Abnormal Conditions

Not applicable.