Multi-node parallel communication method for competitive channel underwater acoustic network containing movement node

Abstract

The invention discloses a multi-node parallel communication method for a competitive channel underwater acoustic network containing a movement node. The method comprises the steps of: laying static nodes; after the movement node enters the communication range of the underwater acoustic communication network, determining the current position and velocity vector of the node relative to a coordinate system, and broadcasting other nodes in the underwater acoustic communication network when a channel is idle to add network signaling; when the node needs to send data, participating in channel competition in a new transmission cycle, calculating the time when the node can send data to a corresponding destination node without conflict, and sending data at the time; and when the movement node needs to exit the network, broadcasting the other nodes when the channel is idle to exit the network signaling, and receiving, by the other nodes, the signaling. The method can effectively improve the utilization efficiency of the channel and reduce the average delay of communication, and can be widely applied to various occasions containing movement nodes, such as underwater acoustic communication networks, underwater acoustic sensor networks and the like.

Description

technical field [0001] The invention relates to the field of underwater acoustic communication, in particular to a multi-node parallel communication method of a competitive channel underwater acoustic network including moving nodes. Background technique [0002] Underwater acoustic communication network has a wide range of uses in underwater exploration, underwater oil exploitation, tactical monitoring, pollution monitoring, tsunami warning, auxiliary navigation, ecological monitoring, etc. Therefore, the efficiency of land-based networking technology will drop significantly when it is used underwater, and it is necessary to modify or redesign the networking protocol according to the characteristics of the underwater acoustic environment. [0003] In a typical underwater acoustic network application, an underwater network is usually composed of several static sensing nodes with relatively fixed positions and a few mobile nodes (such as AUV, etc.) that can move autonomously. ...

AI Technical Summary

Problems solved by technology

However, in the existing handshake-based underwater acoustic network media access control protocol, only one pair of nodes is allowed to communicate in each transmission cycle, so that the time spent in the handshake phase occupies a large proportion in the entire transmission cycle, and the effective data transmission time occupies a small proportion. , which reduces the channel utilization

[0006] (2) Average time extension during multi-node communication

[0007] In order to solve the above problems, Chinese invention patent CN201410714302 provides a multi-node fast communication method suitable for competitive channel underwater acoustic network, which allows multiple nodes in the underwater acoustic network to transmit data in parallel in the same transmission cycle without Conflicts can effectively improve channel utilization efficiency and reduce the average communication delay, but this method is only for networks where all nodes are static nodes, and cannot well meet the needs of underwater applications that include moving nodes

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