Time-space compression network coding based data transmission method in wireless sensor network

Abstract

The invention discloses a time-space compression network coding based data transmission method in a wireless sensor network, which mainly solves problems of great total amount of data transmission and large number of transmission times of a data transmission method in the existing wireless sensor network. The data transmission method comprises the implementation steps of (1) carrying out time-space compression sampling at a node transmitting terminal so as to acquire an original data packet; (2) transmitting the original data packet by using the intra-cluster space-time correlation and inter-cluster inter-flow network coding; and (3) recovering the original data packet by using a gradient projection algorithm GPSR_BB in a receiving terminal sink node. According to the data transmission method, the time-space correlation of perception data is dug in a node sampling stage, the total amount of data is reduced, the data transmission amount is compressed by adopting intra-cluster transmission and inter-cluster transmission, and the number of transmission times is reduced, so that the life time of the wireless sensor network is prolonged, and the data transmission method can be applied to acquisition, transmission and recovery of data in the wireless sensor network.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a data transmission method, which can be used for data collection, transmission and recovery in a wireless sensor network. Background technique [0002] Wireless sensor network (WSN) is a multi-hop self-organizing network with the characteristics of low power consumption, low cost, and distributed. It cooperatively perceives and processes information in the network coverage area through a large number of nodes distributed in the area to be tested. . Wireless sensor networks are generally randomly installed in areas where the environment is harsh or people cannot reach them. After installation, its maintenance and operation generally do not require human intervention. So how to improve the network survival time of WSN as much as possible is a key issue. [0003] The patent "A Data Transmission Method for Wireless Sensor Networks" (publication number: CN10202561...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that adding a coordinator leads to high complexity, and does not consider the energy consumption of the entire network to further prolong the survival time of the network

[0005] To sum up, the existing data transmission methods in wireless sensor networks do not consider the correlation between data, the total amount of data transmission is large, the number of transmissions is large, and the complexity is high at the same time, it is difficult to further improve the survival of the network. time

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