Time reversal underwater acoustic network multiple access method for inter-link interference suppression

Abstract

The invention provides a time reversal underwater acoustic network multiple access method for inter-link interference suppression, which adopts multiple access suitable for a distributed underwater acoustic network MAC (Media Access Control) layer and an inter-node data transmission process, avoids transmission conflicts, greatly improves the probability of one-time transmission success and the channel utilization rate, and reduces the networking energy consumption. Through the active TR space-time focusing property, the space-variant characteristic of an underwater acoustic channel is utilized, the disadvantages are converted into advantages, the broadcast characteristic of the underwater acoustic channel is weakened, and the key effect of effectively isolating signal interference betweenadjacent links in a distributed multi-hop environment is achieved; the power control method not only saves the transmitting power, but also greatly reduces the probability of conflict.

Description

technical field [0001] The invention relates to the field of underwater communication networking, and relates to a time reversal theory, a power control method, a multiple access control technology, etc., in particular to a multiple access method for an underwater acoustic network. Background technique [0002] The ocean accounts for about 71% of the earth's surface and is very rich in resources. With the scarcity of land resources, the pace of human beings entering the ocean is accelerating. Underwater Acoustic Networks (UAN, Underwater Acoustic Networks) monitors the marine environment through the establishment of an underwater network, which greatly enhances the ability to perceive underwater space information, and is beneficial to the maintenance of marine rights and interests, underwater target search, marine resource development, and marine environment monitoring and protection. Etc. is of great significance. In order to obtain a larger range of underwater spatial inf...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies of the prior art, the present invention provides a time-reversal underwater acoustic network multiple access method (E-TRMAC) oriented to inter-link interference suppression. In the network, data packet transmission collisions caused by severe interference between links lead to low channel utilization, time extension and high energy consumption.

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