Method and apparatus for controlling multicast service transmission in base station

Abstract

The invention proposes a resolving scheme of controlling multicast service transmission in base station in wireless communication network. The base station, according to the service identification of the multicast service received by the user terminal request, judges whether the multicast service has been distributed with resource identification, if so, informing the resource identification to the user terminal, so that the user terminal can receive the multicast service on the wireless resource identified by the resource identification; otherwise, distributing a resource identification to the multicast functional distribution, informing the user terminal, and transmitting a multicast adding request message requesting for a multicast service to an superior level network device in order toapply a corresponding multicast service to the base station. When the base station receives the multicast service transmitted by the superior level network device, the base station conveys the multicast service on the wireless resource identified by the allocated resource identification.

Description

Technical field [0001] The present invention relates to a base station in a wireless communication network, and in particular to a method and device for controlling multicast service transmission in a base station. Background technique [0002] As a promising value-added service, the multicast service has been widely developed in the fixed and wireless networks of network operators. With the expansion of broadband wireless access networks, more and more multicast services will be applied in WiMAX (World Interoperability for Microwave Access) networks and fixed-mobile convergence networks. In fixed networks, try to replicate and distribute multicast data packets in network devices close to the user network to reduce network bandwidth consumption. And in each network device, without manual configuration, IP multicast packets can be automatically mapped to MAC layer multicast packets. [0003] In the WiMAX access network, multicast / broadcast services (MBS, Multicast Broadcast Servic...

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Problems solved by technology

[0005] Since the user's demand for multicast services is usually dynamic, the disadvantage of the above-mentioned multi-base station access method is that it is not flexible enough; the static configuration of the connection ID to transmit the multicast service results in a relatively low utilization rate of the connection ID, and the base station does not The multicast service can be freely mapped to the connection identifier; that is, there is no user terminal receiving the multicast service under a certain base station, and there is still a multicast service flow from the access gateway to the base station, and the base station must also send the multicast service business flow, thus wasting the bandwidth from the access gateway to the base station and the wireless resources of the base station

Due to the limited wireless resources of the base station, the number of multicast services in the multicast / broadcast service area is also limited; because the IGMP / MLD proxy function is implemented in the access gateway, the multicast control signal between the base station and the access gateway There are many commands; the multicast join request message received by the user terminal for multicast services needs to be sent to the access gateway before it can get a response, which has a certain delay

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