A time-reverse multiple access method suitable for underwater acoustic network

Abstract

The invention provides a time-reversal multiple access method applicable to an underwater acoustic network and relates to the underwater acoustic communication and underwater network technology field. According to the method, a multiple access mechanism is appointed for an active time-reversal underwater acoustic network, conflicts and bump can be completely avoided when channel correlation is broken, success transmission probability is improved, through active TR space time focusing, spatial variation characteristics of an underwater acoustic channel is utilized to weaken broadcast characteristics of the underwater acoustic channel, not only can the crucial effect of effectively isolating signal interference among adjacent links under the distributed multi-hop environment be realized, but also excellent transmission concealment and confidentiality of the multiple access method is realized through weakening the broadcast characteristics of the underwater acoustic channel, on the condition that underwater acoustic correlation is not determined, spatial reuse and network throughput can be further improved even when channel weak correlation is broken, system time delay is reduced, and energy is saved.

Description

technical field [0001] The invention relates to the technical field of underwater acoustic communication and underwater network, in particular to a channel multiple access method of an underwater acoustic network. Background technique [0002] In an underwater acoustic network, MAC (Media Access Control) is responsible for coordinating efficient and fair access channels for all nodes in the network, aiming to avoid transmission conflicts when different nodes access shared channels. Without the support of an efficient MAC mechanism, data packet transmission collisions between adjacent links in the process of exchanging information between nodes in the network will reduce network throughput, increase system delay, and cause very low channel utilization. rate and battery energy utilization, seriously deteriorating network performance. In underwater acoustic networks where bandwidth and energy resources are very precious, designing an efficient MAC mechanism suitable for underw...

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the deficiencies of the existing technology and solve the problem that it is difficult to completely avoid conflicts when the weak channel correlation is broken in the existing active time reversal-based underwater acoustic network reservation multiple access mechanism, the underwater wireless The multi-hop distributed network has a large number of nodes, channel correlation is difficult to guarantee, and bandwidth and energy consumption are limited. The present invention provides an improved time-reverse multiple access method suitable for underwater acoustic networks.

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