Conflict-free competition-channel parallel communication method of underwater acoustic network

Abstract

The invention discloses a conflict-free competition-channel parallel communication method of an underwater acoustic network, and the method is used for competition protocol based underwater acoustic communication network, underwater acoustic sensing network of full communication structure and the like. In a handshake stage, RTS/CTS signaling are transmitted in parallel via a concurrent time division multiplexing mechanism, conflict between RTS/CTS signaling can be eliminated completely, data transmission conflict caused by that a node cannot master all nodes of successful handshake in the sametransmission period and makes errors in calculating data transmission time in a present method is avoided, the handshake time can be reduced, and the transmission efficiency is improved; and in a last data transmission state, ACK/NACK signaling is sent in an RTS or CTS time slot in the next handshake state instead of time arranged independently, and the utilization efficiency of channels is higher. According to the method of the invention, two dormancy mechanisms are provided, energy consumption of the nodes can be reduced effectively, and the method has significance in the condition that energy of the underwater nodes is limited and not easy to supplement.

Description

technical field [0001] The invention relates to the technical field of underwater acoustic communication, in particular to a parallel communication method for a competition-channel underwater acoustic network without conflict. Background technique [0002] The static underwater acoustic communication network is usually composed of sensor nodes and sea surface buoy nodes deployed on the seabed or in the sea. They form a distributed, multi-node, and large-coverage underwater three-dimensional network through two-way acoustic links. The information is collected, processed, classified, compressed, etc., and the information can be relayed back to the land-based or ship-based information center through the underwater node. [0003] Medium Access Control (MAC) is the key technology of the underwater acoustic communication network, which determines the way nodes share the underwater acoustic channel resources, and its performance directly affects the utilization of the underwater ac...

AI Technical Summary

Problems solved by technology

However, in the existing handshake-based underwater acoustic network MAC protocol, limited by the underwater bandwidth, usually only one pair of nodes can communicate with each other in each transmission cycle. There are the following shortcomings in the environment: (1) The idle time waiting for the arrival of information accounts for a large proportion in the transmission process and cannot be used

Underwater, it takes a long time for the information sent by the source node to reach the destination node. In the case that only one pair of nodes can communicate in each transmission cycle, the idle time waiting for the information to arrive cannot be used. The proportion of it in the transmission process is The larger the value, the more waste of spectrum resources

(2) The communication of multiple pairs of nodes requires multiple transmission cycles, and multiple handshakes make the transmission efficiency not high

[0005] The above methods can effectively improve the performance of the existing handshake-based underwater competition MAC protocol, but because these methods require the source node to accurately know the information of all nodes that

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