Device, system and method for implementing multicast communication

Abstract

The embodiment of the invention provides a device for realizing the multicast communication, a system and a method. The device comprises an identity resolving server; the system comprises an SM, an access route, a receiver and an identity resolving server; the method mainly comprises the following steps that: the SM obtains and stores all mapping relation information between EID of all nodes and IP addresses; according to the EID information of all the nodes, a multicast tree is established and controlled; the multicast communication between the SM and the receiver is realized by the transfer of the access route according to the multicast tree and the IP address information of the nodes. The invention ensures that an intermediate node in the network takes charge of transmitting the multicast communication message without storing the state information of an application layer multicast tree or maintaining the application layer multicast tree, thereby effectively reducing the burden of a middle layer.

Description

technical field [0001] The present invention relates to the communication field, in particular to a device, system and method for realizing multicast communication. Background technique [0002] Multicast is a technology that optimizes the use of network bandwidth resources. The use of multicast technology allows data streams to be sent from one or more data sources to multiple destinations. Unnecessary data packet duplication can be avoided, which is beneficial to reduce backbone network traffic, thereby more effectively utilizing network resources. [0003] At present, multicast is mainly divided into two categories: IP multicast and application layer multicast (also called overlay multicast). In the traditional IP multicast model, group management protocols are used to interact between multicast receivers and multicast routers. Group management protocols include: IGMP (group management protocol for IPv4) and MLD (group management protocol for IPv6) . Between the route...

AI Technical Summary

Problems solved by technology

[0005] 1. The router must save the state for each multicast group, and the scalability is poor;

[0006] 2. All routers are required to support multicast routing protocols, which is not conducive to promotion and use;

[0007] 3. Use a unified model to adapt to all applications, and algorithm design is difficult;

[0008] 4. The management overhead of joining and exiting multicast groups is high

[0023] 1: In this scheme, the relationship between nodes in the logical space does not correspond to the relationship in the actual network, that is, the relationship between nodes in the multicast tree does not correspond to the relationship in the actual network, so the relationship obtained from the multicast tree The packet forwarding path is not necessarily the shortest path, causing a large delay in packet forwarding

[0024] 2: In this solution, the intermediate node needs to save the state information of the application layer multicast tree and maintain the application layer multicast tree, so the burden on the intermediate node is increased

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