Method for implementing Iu-Flex based MBMS

Abstract

A method is provided for implementing Iu-Flex-Based MBMS. A SGSN sends an RAB request to an RNC. The RNC establishes a corresponding RAB for the multicast traffic according to the request and the SGSN sending the request. At the same time, if the RNC detects that a plurality of multicast traffics from other SGSNs correspond to a multicast traffic, the RNC will choose an SGSN as the primary SGSN, take the RAB between the primary SGSN and itself as the primary path to receive the multicast traffic, and maintain the connections to other SGSN. Transmission of the multicast traffic is then performed through the primary SGSN, during the multicast traffic transmission process. The RNC may change the primary SGSN when necessary, receive multicast traffic through the RAB of the new primary SGSN, and maintain the connections to other SGSNs. In this method, multicast traffics can be implemented simply and reliably. The method also helps to reduce consumption of network resources and improve network security and accounting management.

Dependencies are inferred from the claim text.