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Network-coding-based fair service method for streaming media of wireless MESH network

A service method and network coding technology, which is applied in the field of optimizing data selection and forwarding of intermediate nodes, can solve the problems of balanced distribution of throughput downstream nodes, media data playback jitter of downstream nodes, etc., and achieve the effect of avoiding negative effects and enhancing stability

Inactive Publication Date: 2012-07-11
BEIHANG UNIV
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Problems solved by technology

However, when the network frequently jitters, although network coding can improve the throughput, the throughput has not yet been balancedly distributed to the downstream nodes, and the downstream nodes may experience jitter in the playback of media data

Method used

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  • Network-coding-based fair service method for streaming media of wireless MESH network
  • Network-coding-based fair service method for streaming media of wireless MESH network
  • Network-coding-based fair service method for streaming media of wireless MESH network

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Embodiment Construction

[0014] see figure 2 As shown, the present invention adopts a method for fair service of wireless MESH network streaming media based on network coding, which is divided into four stages for realizing fair service:

[0015] The first stage is the stage where the source node S sends the original data. The source node S broadcasts the original data according to the principle of best effort, but due to the characteristics of the wireless channel, some data packets will be lost during the forwarding process;

[0016] The second stage is the fair selection stage of the original data by the intermediate node I, and the intermediate node I selects an original data packet P according to the principle of fairness 0 Prioritize to ensure that it can successfully reach the target node. The fairness principle here is based on the statistics of historical forwarding data, that is, the data packets forwarded by the upstream channel are proportional to the amount of data forwarded;

[0017] T...

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Abstract

The invention discloses a network-coding-based fair service method for the streaming media of a wireless MESH network. In the wireless MESH network, the broadcasting characteristics of a wireless channel and the advantages of network coding are combined, the value of coded data is fully found, and a fair service strategy is adopted, so that each target node can well enjoy the fair service of the streaming media. By the method, the rate of data forwarding from an intermediate node to the target node can be balanced, the throughput of the wireless MESH network can be improved, and the play quality of the streaming media can be improved.

Description

technical field [0001] The invention relates to a method for optimizing intermediate nodes for data selection and forwarding, in particular to a network coding-based fair service method for wireless MESH network streaming media. Background technique [0002] With the rapid development of wireless technology, wireless networks have become an important part of the Internet just like traditional wired networks. The development of network broadband also promotes the application of various wired networks to be transplanted into wireless networks. As a new type of network application, the streaming media service will gradually become an important part of the wireless network. [0003] Wireless MESH (Wireless Mesh Network) network is a multi-hop mobile ad-hoc network that connects fixed and mobile nodes through wireless links. Nodes are composed of MESH routers and MESH clients. Each node functions as a router and repeater, storing and forwarding packets for other nodes in the n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/08H04W40/02H04L1/00
Inventor 王锐贺小桥钱德沛
Owner BEIHANG UNIV
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