A unicast method based on odmrp multicast protocol

A multicast protocol and unicast technology, which is applied in broadcast service distribution, connection management, network topology, etc., can solve the problem of decreased channel utilization and achieve the effect of reducing channel utilization and improving channel utilization

Active Publication Date: 2021-08-31
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention proposes a unicast method based on the ODMRP multicast protocol, which can reduce the problem of channel utilization reduction caused by JQ broadcast messages when the source node and the reverse link are rebuilt.

Method used

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  • A unicast method based on odmrp multicast protocol

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Embodiment Construction

[0027] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings.

[0028] refer to figure 1 , a kind of unicast method based on ODMRP multicast protocol, specifically comprises the following steps:

[0029] 1) Due to business incentives, the source node starts to establish a link and starts sending JQ messages;

[0030] 2) Judging the received data type, JQ is transferred to 3), and JR is transferred to 8);

[0031] 3) Judging whether this node is a receiving node, if yes, go to 4), otherwise go to 7);

[0032] By adding situation awareness messages to the protocol, it can be judged whether the frequency of sending JQ messages needs to be adjusted, so as to realize fast adaptive network topology changes.

[0033] 4) Start the JR sending timer of the unicast receiving node, and turn to 5);

[0034] If the receiving node has business data, it will send JR messages regularly; if the business data stops, it ...

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Abstract

The invention discloses a unicast method based on the ODMRP multicast protocol, and belongs to the technical field of wireless ad hoc networks. This method is applied to the wireless ad hoc network established based on the ODMRP multicast protocol. During unicast communication, the destination node actively sends a unicast JR response message to the source node to avoid the source node periodically sending the entire network to maintain the routing connection. Broadcasting JQ messages causes a decrease in channel utilization across the network. At the same time, the relay node establishes a two-way route after receiving the JR information, and the destination node automatically establishes a reverse route after receiving the JQ unicast link establishment request, so as to reduce the network redundant routing caused by the two-way link establishment in the ODMRP multicast protocol Information transfer.

Description

technical field [0001] The invention relates to the technical field of wireless ad hoc networks, in particular to a unicast method based on the ODMRP multicast protocol. Background technique [0002] Ad hoc network is a distributed multi-hop network system, which does not need a central node and has the ability of self-organization and self-healing. Currently, there are two main types of Ad hoc multicast protocols: protocols based on tree topology (such as MADOV) and protocols based on mesh topology (such as ODMRP). Academic circles generally believe that grid-based multicast protocol has better performance. [0003] On-demand Multicast Routing Protocol (ODMRP) is very suitable for Ad hoc networks with large bandwidth restrictions, strong mobility and limited node energy. The ODMRP multicast protocol establishes and maintains a mesh-based routing protocol based on group membership and multi-hop routing according to the requirements of the source. It includes routing reque...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/06H04W76/10H04W76/40H04W84/18
CPCH04W4/06H04W84/18H04W76/10H04W76/40
Inventor 崔佳巍王振雷杜龙海王俊芳陈丛
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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