MAC (multiple access control) protocol communication method for underwater sensor network with asynchronous duty ratio and network coding

Abstract

The invention discloses an MAC (multiple access control) protocol communication method for an underwater sensor network with an asynchronous duty ratio and network coding. The method comprises the following steps: initializing an MAC protocol, and determining the data exchange time of each pair of transmitting nodes and receiving nodes; determining a coding node in a network coding layer by using a coding node selection algorithm; after the node in the network coding layer is awoken, if the node is a common node, directly transmitting out a received data pack; and if the node is a coding node, transmitting out after coding. The method disclosed by the invention has the advantage of improving the network throughput and the data transmission rate.

Description

technical field [0001] The invention belongs to the field of underwater wireless sensor network communication, and in particular relates to an underwater sensor network MAC protocol communication method capable of improving network throughput, asynchronous duty cycle and network coding. Background technique [0002] With the development of computer technology, microelectronics technology and communication technology, the related technologies of Underwater Wireless Sensor Networks (UWSNs) have also developed rapidly, and are widely used in marine data collection, pollution detection, marine detection, Disaster early warning, aid navigation and strategic monitoring. The Media Access Control (MAC) protocol is an important aspect of UWSNs research. It determines the use of underwater channels and directly affects important performances such as network energy efficiency, network throughput, and delay. It is important to ensure efficient communication of UWSNs. One of the key fun...

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Problems solved by technology

However, due to the use of the sleep wake-up mechanism, the channel delay becomes longer, and maintaining the sleep schedule and scheduling mechanism at the same time will generate overhead, thereby reducing the protocol throughput.

[0004] Aiming at the problem of low data transmission rate of UWSNs, Shaobin Cai et al. proposed a network coding-based MPNC-MAC protocol, which first establishes three disjoint paths, and transmits two sets of data A and B from two paths Go out; the data C (C=A⊕B) transmitted in the middle path is the data obtained through network coding

The protocol can effectively improve the network throughput and data transmission rate by using network coding, but when the protocol is used in node-intensive underwater applications, because each node sends three data packets, the network collision is serious, and the data The transfer rate is reduced

At the same time, all nodes as encoding nodes will lead to greater energy consumption

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