Coordination mechanism method of multiple-hop underwater acoustic network data transmission

Abstract

The invention relates to a coordination mechanism method of multiple-hop underwater acoustic network data transmission and belongs to the underwater communication field. According to the method, a coordination mechanism of inter-node data transmission is established based on the transmission characteristic of large time delay of an underwater acoustic channel; the length of data blocks is set reasonably, the distances between nodes are controlled, and the magnitude of transmission power of each node is controlled; and after a node i sends a data block j, the next data block j-1 of a node i-1 is received at first, then the feedback signals from a node i+1 are received, if acknowledgement signals are received, the node i directly begins sending the next data block j-1 from the node i-1, otherwise, the node i re-transmits the original data block j, and thus, the listening state time of the node i can be fully utilized. With the method of the invention adopted, the average end-to-end delay of the transmission of an underwater acoustic data multiple-hop transmission system can be effectively reduced with the bit error rate performance of the underwater acoustic data multiple-hop transmission system ensured; and underwater acoustic data are sent and received by using the idle time of the listening of the underwater acoustic network nodes; and the average end-to-end delay changes slowly with a signal to noise ratio.

Description

technical field [0001] The invention relates to underwater communication, in particular to a multi-hop underwater acoustic network data transmission coordination mechanism method based on the underwater acoustic network multi-hop coordination mechanism. Background technique [0002] Due to the inherent time-space-frequency characteristics of underwater acoustic channels, as well as the characteristics of narrow bandwidth, high noise, strong multipath interference, long transmission delay, and large random fluctuations, it is generally considered to be one of the most challenging wireless channels so far. one. In recent years, underwater acoustic communication and its network technology have made great progress due to their continuous development in the field of marine information applications. With the in-depth understanding, development and protection of the ocean, the traditional independent point-to-point ocean detection and information collection have begun to transform...

AI Technical Summary

Problems solved by technology

[0005] However, in the above method, when each node transmits data, the waiting time for the response is idle, which reduces the amount of data transmitted per unit time.

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