Media access control protocol for underwater sensor network based on TDMA

Abstract

The invention relates to an underwater sensor network media access control protocol based on a TDMA and applied in an underwater sensor network with high bit error rate, high time delay and low bandwidth. The invention is an improved underwater sensor network media access control protocol based on the TDMA on the basis of the traditional TDMA. The concrete method comprises that: different optimal protection time is set according to different propagation delay in concrete network environments in which each node is positioned, so as to avoid conflicts brought by the change of time delay; delay time is utilized to distribute propagation time for each node, so as to solve problem of conflict-free propagation of the nodes of an underwater sensor; the delay time is encapsulated into super frames, so as to notify each node about data packet transmission time; finally, lightweight synchronous communication is realized. The underwater sensor network media access control protocol lowers the requirement for accurate synchronization of each node of a TDMA mechanism to some extent, reduces conflicts and improves channel utilization rate and network throughput.

Description

technical field [0001] The invention relates to a TDMA-based underwater sensor network medium access control protocol. Background technique [0002] The underwater acoustic sensor network is a new network technology. It is an underwater cableless communication network, usually composed of acoustically connected subsea sensor nodes, autonomous underwater vehicles and sea surface stations as master nodes. They are deployed in specific areas to perform cooperative surveillance missions. It is mainly used for medium and long-term underwater early warning, target detection, and monitoring of marine hydrological environmental elements in the area covered by the underwater sensor network. Its broad application prospects have attracted great attention from the academic and military circles. In recent years, underwater sensor networks have become a research hotspot in wireless sensor networks. However, the variable underwater environment and the common noise make the bit error rat...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a medium access control protocol for underwater sensor networks based on TDMA, which overcomes the high cost of underwater node synchronization and the high delay of different links by utilizing the characteristics of high delay of underwater sensor networks and different delays of different links. The large propagation delay leads to defects such as low channel utilization. By setting the delay time to allocate the transmission order of each node, the base station can receive data frame by frame without conflict and the waiting time is very short, which improves the channel utilization and makes Maximize the flow, and realize the lightweight synchronous communication of all nodes in the underwater sensor network, reduce the requirement for precise synchronization of nodes under the TDMA mechanism, effectively reduce conflicts, and shorten waiting time

Images