Layered transmission method and system for multimedia broadcast/multicast service

Abstract

The invention provides a method for hierarchically transmitting multimedia broadcasting / multicasting service. The method comprises the following steps: a start request of the multimedia broadcasting / multicasting service initialized by network side is received; service information of sub-streams in different layers is obtained and resources for data of the sub-streams in different layers is distributed according to the start request, when the service is transmitted in a hierarchical transmission mode, and response message for the network side is returned; the sub-stream data transmitted by the network side is received after the network side receives the response message, and the sub-stream data is transmitted out after synchronous treatment. The invention also provides a system for hierarchically transmitting the multimedia broadcasting / multicasting service. By adopting the method and the system, the existing message signaling process is not changed by adding sub-stream identifications of a plurality of sub-streams indicating the same service; an access network is convenient to distribute and coordinate the resources a plurality of sub-streams, synchronization of data transmitting of each sub-stream is ensured, and the terminal is ensured to obtain the gain brought by hierarchical coding.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method and system for layered transmission of multimedia broadcast / multicast services. Background technique [0002] In order to effectively utilize mobile network resources, the Third Generation Partnership Projects (Third Generation Partnership Projects, 3GPP) proposed Multimedia Broadcast / Multicast Service (MBMS), which provides a data source to multiple The point-to-multipoint service for users to send data realizes the sharing of network resources and improves the utilization rate of network resources, especially air interface resources. [0003] At present, in the transmission of multimedia broadcast / multicast services, a multimedia broadcast / multicast service data is decomposed into data streams of different levels, and the data streams of different levels are respectively modulated to different broadband multimedia broadcast / multicast systems. Simultaneous...

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Problems solved by technology

[0004] After the service implements layered coding at the application layer, it is transmitted to the user through the access network. For the access network, the data of different layers can be regarded as different services, but coordination and synchronous transmission of data belonging to different layers are required; but currently for For multi-media broadcast / multicast service layered transmission, the core network cannot notify the access network of the layered service layered information, so the access network cannot guarantee to allocate coordinated resources for multiple sub-flows belonging to the same service, and control each sub-flow The air interface transmission time of stream data is synchronized; at the same time, there are no specific and appropriate regulations on the transmission synchronization of each sub-flow air interface in the access network

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