Wireless sensor network S-MAC protocol optimization method based on traffic self-adaption

Abstract

The invention relates to a wireless sensor network S-MAC protocol optimization method based on traffic self-adaption. The wireless sensor network S-MAC protocol optimization method is characterized bycomprising a multi-factor cross controlled backoff mechanism, a duty ratio mechanism based on traffic self-adaption, and a power control mechanism based on traffic self-adaption. The wireless sensornetwork S-MAC protocol optimization method has the advantages of being scientific and reasonable, having high applicability, low time delay and high throughput, being capable of being applied to complex environments, prolonging the network lifetime and the like.

Description

technical field [0001] The invention belongs to the technical field of wireless sensor networks, and relates to a flow self-adaptive wireless sensor network S-MAC protocol optimization method. Background technique [0002] Medium Access Control (MAC) protocol is one of the core technologies in wireless sensor networks, which has a great impact on the performance of sensor networks. In order to make wireless sensor networks energy efficient, many MAC protocols have been proposed. The MAC protocol coordinates and allocates many nodes to access the common channel, which determines the channel acquisition method of the nodes, and is one of the basic protocols that determine the performance of the wireless sensor network system. At the same time, because the MAC protocol directly operates the radio frequency module, which is the most energy-consuming part of the sensor node, researching the high-efficiency MAC protocol is an effective way to prolong the life cycle of the node an...

AI Technical Summary

Problems solved by technology

However, the length of the sleep period of the node is fixed, and it does not have good adaptability in the environment of network traffic changes, which will lead to a lot of unnecessary energy waste.

[0006] (3) The S-MAC protocol uses a fixed power transmission mechanism, and does not consider the impact of network traffic on transmission power

If each node transmits data with a large power, the transmission distance will become relatively far, and the number of nodes covered within the transmission radius will be large, which will aggravate the conflict between nodes and reduce the transmission of data Efficiency, and cause a lot of waste of node energy

On the other hand, if the transmission power of the nodes is too small, the connectivity of the wireless sensor network cannot be guaranteed, and some sensor nodes may not be able to communicate with external nodes, which seriously affects the network performance.

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