Method for discovering neighbor nodes in wireless ad hoc network of switchable beam antenna

Abstract

The invention provides a method for discovering neighbor nodes in a wireless ad hoc network of a switchable beam antenna, and aims to solve the problem of low neighbor node discovery efficiency in the prior art. The method comprises the following steps: calculating a quantity of probable neighbor nodes in different directions of a certain node; judging whether finding is finished or not in different directions of the certain node; selecting discovery directions of the neighbor nodes of the certain node; judging whether discovery of the neighbor nodes in the directions is finished or not; selecting a mode for the certain node to execute neighbor node discovery; if a first mode is selected, transmitting information firstly and receiving information secondly by the certain node; if a second mode is selected, receiving information firstly and transmitting information secondly by the certain node; and judging the neighbor node information by the certain node according to the received information, and preparing for next neighbor node discovery. According to the method, next execution of the neighbor node discovery in the different directions is adjusted according to the information of the neighbor nodes discovered by the certain node in the different directions; and meanwhile, direction change of the neighbor node discovery is driven, and the information transmission power of the neighbor node discovery is adjusted according to events. Thus, the neighbor node discovery time and the informational conflict probability are reduced.

Description

technical field [0001] The invention belongs to the technical field of communications, and relates to a method for discovering adjacent nodes in a wireless ad hoc network, in particular to a method for discovering adjacent nodes in an ad hoc network with switchable beam antennas, which can realize rapid discovery of adjacent nodes in a wireless ad hoc network, A physical layer communication protocol for pure directional antennas. Background technique [0002] The wireless ad hoc network is a multi-hop mobility peer-to-peer network that uses wireless communication and dynamic networking. It can realize mutual communication between nodes without using the existing network infrastructure. It has great potential in sensor networks and disaster relief. Wide range of applications. With the development of antenna technology, directional antennas can concentrate signals in a single direction. Compared with omnidirectional antennas, directional antennas have longer transmission dist...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects in the above-mentioned prior art, and propose a wireless ad hoc network neighbor node discovery method with switchable beam antennas, by improving the selection conditions of the scanning direction and the completion of the neighbor node discovery when the node performs neighbor node discovery Judgment conditions, and at the same time add the strategy of changing the information transmission power and state selection probability of the direction according to the real-time neighbor node discovery number in each direction, which is used to solve the problems existing in the existing wireless ad hoc network neighbor node discovery method with switchable beam antennas inefficient technical issues

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