Node transmission sequence optimization competitive channel underwater acoustic network parallel communication method

Abstract

The invention discloses a node transmission sequence optimization competitive channel underwater acoustic network parallel communication method. According to the invention, each source node uses the same non-random algorithm to calculate the sequence and time of data transmission of the node in the transmission cycle; data are transmitted to a corresponding destination node after timing is up to the time; after the data of all source nodes are transmitted, each destination node uses the same non-random algorithm to calculate the sequence and time of ACK or NACK signaling transmission of the node in this transmission cycle; and after timing is up to the time, the destination node with correct received data transmits ACK signaling to the corresponding source node, and the destination node with wrong received data transmits NACK signaling to the corresponding source node. According to the method, the time required for one transmission cycle is effectively reduced and the channel utilization efficiency is improved under the premise of conflict-free parallel node data transmission. The method can be widely used in various underwater acoustic communication networks based on competition agreement, an underwater acoustic sensor network and other occasions.

Description

technical field [0001] The invention relates to the field of underwater acoustic communication, in particular to a method for parallel communication of a competitive channel underwater acoustic network with node transmission order optimization. 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. The demand for high-performance underwater acoustic communication networks will increase. [0003] According to the different ways of channel usage, the existing underwater acoustic communication network can be roughly divided into two categories, one is fixed channel allocation, that is, the entire communication spectrum resource is divided into multiple channels, which are fixedly allocated to nodes for individual use. The use of this channel can avoid collisions, but the t...

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Problems solved by technology

[0004] Handshaking is the most commonly used collision avoidance technology in underwater acoustic networks that compete to use channels. For example, handshaking mechanisms are used in commonly used underwater acoustic network media access control The time delay of the channel is very long, and the prior art has the following deficiencies: (1) low channel utilization

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. Due to the low propagation speed of sound waves in water, the information interaction between nodes in the handshake phase usually takes a long time to complete. , so that the time spent in the handshake phase occupies a relatively large proportion in the entire transmission cycle, and the proportion of effective data transmission time is small, which reduces the utilization of the channel

(2) Average time extension during multi-node communication

Since this method utilizes the characteristics of large time delay in information transmission between underwater nodes, it uses the method of letting nodes send information in advance to achieve parallel transmission without mutual interference, so as to achieve the purpose of improving transmission efficiency and reducing time. Therefore, different The sending order of nodes will significantly affect the time for nodes to send data, thereby affecting the efficiency of the entire transmission. However, the Chinese invention patent CN201410714302 only provides a method for arranging the order of nodes sending data according to a predetermined priority, which fails to affect the node's sending order. The sending order is further optimized, limiting its performance improvement

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