Route establishing and link detecting method and device for mobile Ad hoc network

Abstract

The invention discloses a route setup and link detection method for a wireless Ad hoc network, which comprises the following steps: each node regularly broadcasts a Hello message, and nodes which receive the Hello message all maintain a neighboring node list and records the connection state between the current node and the neighboring nodes including a communication state and a interruption state; received signal quality parameters of the neighboring nodes are acquired and the connection state of the corresponding neighboring node is adjusted in accordance with the signal quality parameters; when a certain node receives a routing request, the routing request is forwarded or discarded according to the connection state of the neighboring node list; the packet loss ratio of a routing link is detected; and the current routing link is judged to be interrupted if the packet loss ratio exceeds a reference threshold, and the connection state of the neighboring node list of the corresponding node is changed to be off state in the routing link. The invention can effectively improve the failure detection of route link, the timeliness and effectiveness of updating.

Description

technical field [0001] The present invention relates to the field of wireless network communication, in particular to a method of route establishment and link detection of an Ad hoc On-Demand Distance Vector (AODV) routing protocol of a wireless ad hoc network (Mobile Ad hoc Network, MANET) Methods and devices. Background technique [0002] MANET, also known as mobile AdHoc network, is a multi-hop wireless network formed by a group of mobile nodes through ad hoc connections. It is a communication network without a center structure as opposed to traditional wireless networks with base stations. In recent years, with the miniaturization of mobile devices, MANET has begun to participate in the establishment of personal communication networks and has become an important network access form of super 3G networks. Using AdHoc to form a network has the characteristics of flexibility, convenience and speed. Compared with some existing networks with a central structure, MANET has low...

AI Technical Summary

Problems solved by technology

However, in the case of heavy network load, it is difficult to guarantee the real-time and effectiveness of link failure detection

Part of the reason is that it tends to use the same node as an intermediate node in path selection, and a large amount of data is transmitted through a small number of nodes, causing network congestion, resulting in high packet delay; and, when routing is updated, routing back and forth Handover, the update time is long, and the route is unstable due to frequent route updates, especially affecting the quality of service (Qos) of real-time voice services

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