QoS-based Ad Hoc network adaptive node speed multi-path routing method

Abstract

The invention discloses a quality of service-based (QoS) Ad Hoc network adaptive node speed on-demand multi-path distance vector routing (AOMDV) algorithm. Four constraint conditions including bandwidth, time delay, hop count and priority are added into a QoS constraint-based routing algorithm; judgment is made and multi-path routing is selected by using an on-demand filtering method; thus the selected route has certain QoS guarantee; and the route is adaptively adjusted according to the change of network topology on the basis of adaptively using the movement speed of a node as a periodic standby route updating rule, so that the problem of failed route maintenance in the conventional signal strength-based route updating mode of an Ad Hoc network is solved. The novel QoS-based Ad Hoc network adaptive node speed multi-path routing algorithm of the invention can be simply and flexibly implemented, and can effectively improve the QoS level of a selected path and the success rate of the selection of the high-priority service routing and improve the validity of the route maintenance and the utilization rate of the network resource.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to the multi-path routing technology of Ad Hoc network. Background technique [0002] With the rapid development of Ad Hoc network, its application scope is getting wider and wider. Due to the limited transmission range of Ad Hoc network nodes, the source node needs the assistance of other nodes when sending data to the destination node. Routing protocols have become an indispensable part of Ad Hoc networks and are also the focus of Ad Hoc network research. [0003] The routing protocol of Ad Hoc network mainly includes three core functions of path generation, path selection and path maintenance. Its main design goals are: to meet the application requirements while reducing the network overhead as much as possible, to obtain the overall effectiveness of resource utilization, and to expand the network throughput. According to the routing discovery strategy, it can be...

AI Technical Summary

Problems solved by technology

However, if the node moves very fast and the energy is large enough, when the node moves relatively far away from its neighbors, its power is still very strong (relative to the power of other nodes), and the path containing this node may It is no longer the best path or some nodes have exceeded the effective range of link establishment, which will lead to the obsolescence or failure of the backup path, resulting in the loss of transmitted data, increasing the delay, and causing unnecessary link congestion

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