Section: 17.2 MBMS service registration / de-registration
Content: The MBMS service registration of the GGSN at the BM-SC shall be performed after authorisation of the first user on a particular GGSN, for a particular multicast MBMS Bearer service. The MBMS service de-registration of the GGSN shall be performed when the last user leaves a particular GGSN, for a particular multicast MBMS bearer service. The MBMS de-registration procedure shall be initiated by BM-SC when the specific multicast MBMS service is terminated. The GGSN shall support pre-configuration of a BM-SC or Gmb proxy server for registration/de-registration purposes. The GGSN may support a list of pre-configured BM-SC servers based on the MBMS bearer service requested for bearer registration purposes.