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Method for achieving dynamic multicast spanning tree path adjustment based on OpenFlow

A spanning tree and multicast technology, applied in the field of computer networks, can solve the problems of hard to change transmission paths, poor flexibility, cumbersome request operations, etc., and achieve the effect of optimizing multicast transmission efficiency

Inactive Publication Date: 2013-10-09
COMP NETWORK INFORMATION CENT CHINESE ACADEMY OF SCI
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AI Technical Summary

Problems solved by technology

However, when IGMP manages multicast group hosts, problems such as query delay and report delay inevitably occur.
The response time is slow when the host in the multicast group changes, the request operation is cumbersome, and the flexibility is poor
In addition, the spanning tree algorithm only adjusts the multicast tree when the host joins or leaves the multicast group. When the multicast source and multicast host remain unchanged, once the multicast tree is generated, the transmission path is difficult to change.

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  • Method for achieving dynamic multicast spanning tree path adjustment based on OpenFlow
  • Method for achieving dynamic multicast spanning tree path adjustment based on OpenFlow
  • Method for achieving dynamic multicast spanning tree path adjustment based on OpenFlow

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Embodiment Construction

[0030] OpenFlow was proposed by the Clean State project team of Stanford University in 2007 and is the core technology for implementing software-defined networks. Simply put, OpenFlow is a new switch design scheme and its supporting communication protocol, which enables network researchers or developers to access the data forwarding plane of network switches / routers. Its core idea is to separate the routing control logic of the switch from the data forwarding function, so that the traditional packet forwarding process controlled by the switch / router becomes a joint process between the OpenFlow Controller (OpenFlow Controller) and the OpenFlow Switch (OpenFlow Switch). Finish. Through the separation of control and forwarding, OpenFlow technology makes complex traffic management possible.

[0031] The present invention uses the OpenFlow technology to solve the problems of the host joining / leaving the multicast group, the dynamic adjustment of the multicast spanning tree path, a...

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Abstract

The invention provides a method for achieving dynamic multicast spanning tree path adjustment based on OpenFlow. An OpenFlow technology is utilized to solve the problems in a multicast service of a host entering or leaving a multicast set, multicast spanning tree path dynamic adjustment and distributed multicast spanning tree strategies. According to the OpenFlow technology, a traditional packet forwarding process completely controlled by a router or a switch is converted into the process together completely by the OpenFlow switch and the controller, and therefore separation of forwarding logics and specific forwarding operation is achieved.

Description

[0001] technical field [0002] The patent application of the present invention relates to the field of computer networks, in particular to a method for implementing dynamic multicast spanning tree path adjustment based on OpenFlow. [0003] Background technique [0004] In computer network communication, multicast is one of the important services of network transmission. The advantage of multicast transmission is to save network resources, reducing multicast spanning tree cost and optimizing multicast transmission network are important research directions of multicast problems. [0005] There are various multicast algorithms, mainly static multicast spanning tree algorithms, such as DIjkstra, DDSP, Prim, Krustal, etc.; researches on dynamic multicast spanning tree algorithms are relatively few, such as SBPT, GRD, etc. In an actual network, members of a multicast group can join or leave a multicast group at any time. The spanning tree algorithm will generate different mul...

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Application Information

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IPC IPC(8): H04L12/761H04L45/16
Inventor 葛敬国吴玉磊鄂跃鹏游军玲申罕骥李佟韩春静
Owner COMP NETWORK INFORMATION CENT CHINESE ACADEMY OF SCI
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