Multipath routing method in Ad Hoc network environment

Abstract

The invention discloses a multipath routing method in an Ad Hoc network environment, which provides a new multipath routing method for assuring QoS based on the existing method of ensuring end-to-end time delay by adding the accumulated time delay parameter for path selection in the Ad Hoc network. The routing method comprises the following two parts: 1. screening paths by using the accumulated time delay as the access control parameter for path selection; and 2. introducing a parameter taking node states into account, i.e. node time delay (Ndelay), and further selecting from the paths selected according to the accumulated time delay by using the node time delay (Ndelay) as another criterion for judging the quality of the path. Thus, the method overcomes the defect that the multiple paths selected according to the accumulated time delay can not be compared in the quality aspect, thereby ensuring the QoS performance of the Ad Hoc network.

Description

technical field [0001] The invention belongs to the technical field of Ad Hoc self-organizing networks of communication systems, and more particularly, relates to a multi-path routing method in an Ad Hoc network environment. Background technique [0002] Ad Hoc network is a multi-hop temporary autonomous system composed of a group of mobile terminals with wireless transceivers. This kind of network is an ad hoc network without a central infrastructure, and the mobile nodes in the network establish wireless connections through multi-hop. Because the wireless Ad Hoc network does not need the support of the central infrastructure, it can be applied in many special occasions, such as military applications and emergency disaster relief, and the AdHoc network can be quickly deployed and put into use. [0003] The dynamically changing network topology, limited node resources and limited wireless transmission bandwidth of Ad Hoc network determine that the routing protocol of Ad Hoc...

AI Technical Summary

Problems solved by technology

[0005] 1. The cumulative delay can only reflect the time for the routing request (RREQ) to be transmitted from the source node to the intermediate node during the route discovery process, and cannot reflect the end-to-end delay

This algorithm for filtering paths only excludes the paths that do not meet the delay requirements in route discovery, and the remaining paths may not all meet the delay requirements in the application;

[0006] 2. There are many paths obtained by this path selection method, and the advantages and disadvantages of them cannot be compared;

[0007] 3. Only the cumulative time of route discovery is used as the only metric, and the performance of the path obtained by the algorithm in terms of other QoS performance cannot be guaranteed

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