Channel Model Construction Method and Simulation Method for Wireless Sensor Networks

Abstract

The present invention provides a channel model construction method and a simulation method of a wireless sensor network. The channel model construction method includes: setting a transmitting node and a receiving node in a test area; obtaining a receiving signal when the transmitting node and the receiving node are separated by a certain distance Intensity; obtain multiple received signal strengths under different heights, horizontal distances and directions; obtain propagation path loss according to multiple received signal strengths; construct a channel model according to the propagation path loss and the distance between the transmitting node and the receiving node; the simulation The method includes writing the obtained logarithmic distance path loss model into a COOJA scene file, loading the transmitting node, the receiving node and the COOJA scene file used for testing, so as to simulate the wireless sensor network under the required terrain environment. The invention can construct the path loss model under the current terrain environment, and can simulate the networking of the nodes used in the experiment under the specific terrain environment to evaluate the network performance.

Description

technical field [0001] The invention relates to the technical field of wireless sensor networks, in particular to the technical field of wireless sensor network testing and simulation, and specifically relates to a channel model building method and a simulation method of a wireless sensor network. Background technique [0002] A wireless sensor network (Wireless Sensor Network, WSN) is composed of self-organized sensor nodes, which can be used to monitor various signals in a specified area. The wireless channel is closely related to its working environment. Under the conditions of different environments and different antenna heights, the propagation loss caused by the same distance of signal transmission will be significantly different, which will also lead to the signal loss under this condition. The maximum transmittable distance varies. In many applications, it is necessary to deploy a large number of sensor nodes on the ground or low-altitude objects. In near-earth wire...

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Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a channel model construction method and simulation method for a wireless sensor network, which is used to solve the problem of large deviations between the channel model and network planning deployment and actual application in the prior art

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