Method, equipment and system for multicast control

Abstract

The invention discloses a method for multicast control and the method includes the following steps of: receiving a request for joining a multicast group of a first edge node or a request for leaving the multicast group of the first edge node; when the request for joining is received, searching for a nearest joining replication point corresponding to the first edge node; when the request for leaving is received, searching for a nearest leaving replication point corresponding to the first edge node; and reserving bandwidth resource from the searched nearest joining replication point to the first edge node, or releasing bandwidth resource from the searched nearest leaving replication point to the first edge node. The invention also discloses equipment and a system for multicast control. By using a network resource management node to control the multicast admission and release process, the invention realizes the uniform management of multicast bandwidth resource, reduces the interactive transmission of a great amount of management messages in multicast transmission process, dynamically distributes bandwidth and improves the utilization rate of network bandwidth.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method, device and system for multicast control. Background technique [0002] At present, the TV service provided on the Internet is called IPTV. The IPTV service basically includes two forms: video on demand (VoD, Video on Demand) and broadcast TV (BTV, Broadcast TV). VoD transmits TV programs through unicast, The BTV service specifically refers to TV programs transmitted by broadcast or multicast on the IP network. Video services occupy a lot of network bandwidth resources. When a large number of video programs are flooded on the network, they will compete for the limited bandwidth of the network irregularly. To ensure the quality of services, the network needs to manage resources occupied by services in a unified manner, and decide whether to allow a certain service to occupy network bandwidth or release network bandwidth according to the idle status of band...

AI Technical Summary

Problems solved by technology

[0003] Existing technology implements resource admission and release control for multicast services in the core network. The problem encountered is that the existing multicast protocol technology is to establish a multicast tree for the media stream corresponding to each multicast group. In the core network domain, when there is a huge amount of media streams, the multicast router for multicast routing management will consume processing resources by a large number of multicast routing protocol packets, and the storage space will also be occupied by a large number of multicast status records. The network capacity becomes difficult to expand due to these limitations, this problem is called the scalability problem

[0004] In addition, there is no bandwidth guarantee mechanism in the process of multicast transmission in the existing technical solutions, and it is easy for a new egress node to join the multicast group to wait for too long to allocate bandwidth resources, and the media stream cannot be smoothly transmitted, or for a node to leave The egress node of the multicast group cannot release bandwidth resources in time, which may easily cause network congestion

Images