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Real-time multicast method in wireless multi-hop network

A wireless multi-hop, multicast group technology, applied in wireless communication, broadcast service allocation, network traffic/resource management, etc., can solve problems such as restricting applications and wasting network resources

Inactive Publication Date: 2012-05-02
HOHAI UNIV
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Problems solved by technology

Although this large-scale encoding mechanism can improve the success rate of the receiving node in recovering the original data packet, when the number of receiving nodes is small relative to the network scale, this mechanism wastes limited network resources to a considerable extent.
Compared with the multicast mechanism without coding operation, network coding also brings additional delay of buffering data packets, which limits its application in real-time business

Method used

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  • Real-time multicast method in wireless multi-hop network
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Embodiment Construction

[0083] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0084] Such as figure 1 Shown, the real-time multicast method in a kind of wireless multi-hop network designed by the present invention is characterized in that the method comprises the following steps:

[0085] Step (1): Use the Multicast Announcement control packet to initialize the network as a mesh network;

[0086] Step (2): Assess the current network conditions and obtain all required network parameters;

[0087] Step (3): According to the current network conditions and the real-time requirements of the business, adaptively select the network coding or forward error correction coding mechanism, and dynamically adjust the coding parameters;

[0088] Step (4): The core node packs the real-time service data stream into groups, performs coding operations on each group block according to the selected coding mechanism and coding parameters, and t...

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Abstract

The invention discloses a real-time multicast method in a wireless multi-hop network. The method comprises the following steps of: constructing a mesh network; assessing a network condition; adaptively selecting an optimum coding mechanism and coding parameters; performing coding operating by using a core node; processing by using an intermediate node; and processing by using a receiving node. The real-time multicast method in the wireless multi-hop network designed in the invention is applied to a real-time multicast service in a mobile ad hoc network, the optimum coding mechanism and the parameter can be adaptively selected according to the current network condition, the reliability and throughput of the network are improved, the overall energy consumption of the network is reduced and the requirement on the real-time property of services can be met.

Description

technical field [0001] The invention relates to a real-time multicast method in a wireless multi-hop network, which improves the reliability and throughput of the network by combining forward error correction and network coding, while reducing the overall energy consumption of the network and meeting the real-time requirements of services . Background technique [0002] The mobile ad hoc network has the characteristics of dynamic network topology changes, unstable transmission links, and limited node energy. How to implement real-time multicast in MANET has become a research hotspot in recent years. Generally speaking, a more effective multicast can be realized by constructing a multicast tree, such as MAODV. However, due to the relatively complex structure of the multicast tree and the large amount of network resources consumed by maintaining the multicast tree, the improvement of network performance is affected to a large extent, and even the network performance is reduc...

Claims

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Application Information

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IPC IPC(8): H04W4/06H04W28/06H04W28/14H04L1/00
CPCY02B60/50Y02D30/70
Inventor 谭国平倪新洋季敏李岳衡
Owner HOHAI UNIV
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