Method for snooping and sleeping low-load wireless sensor network MAC layer

Abstract

The present invention discloses a low load wireless sensor network MAC layer monitoring and resenting method comprising synchronous scheduling list phase of establishing node and node normal work phase of adopting EmMAC work mechanism; the node starts the radio frequency to detect channel in the normal work phase when arouses the timer to trigger, if the transmitting node is to transmit the data, so the transmitting node must waken before the EmMAC period; the EmMAC work mechanism divides the MAC layer into CSMA delamination and EmMAC delamination; the present invention uses synchronous sleep arousing mechanism, short preamble packet, fake preamble domain mechanism and two stage channel carrier to monitor through the whole network node so as to reduce the free time of the node and increase the sleep time; synchronously, the scheduling list only records the left time domain of the node and leads all kinds of low consumption technologies such as collision avoidance, overtime work, overhearing avoidance and so on when receives the data so as to greatly improve the energy saving ration of the present invention and achieve the design object of ultra-low-power.

Description

Technical field: [0001] The invention relates to a low-load wireless sensor network MAC layer monitoring dormancy method. Background technique: [0002] Low-load wireless sensor network technology has the advantages of fast and flexible networking, and is not restricted by wired networks. It can be applied to emergency search, disaster relief, environmental monitoring and other fields, and has broad application prospects. However, the problem of energy consumption has always limited the development of low-load wireless sensor network technology. How to save energy consumption of nodes, especially to improve the energy utilization efficiency of the MAC layer, so as to prolong the survival time of the network, has always been a problem in the practical application of wireless sensor networks. The key issue. Not only does the radio consume the most energy in transmit and receive modes, but it is also expensive to run because it consumes more energy in idle mode. Therefore, th...

AI Technical Summary

Problems solved by technology

The disadvantages of the LPL protocol are: 1. The sender needs to send an extra preamble field that is slightly longer than the LPL cycle, so it consumes more energy; 2. It cannot integrate some energy-saving technologies such as crosstalk avoidance

The shortcomings of the S-MAC protocol are: 1. Since the sleep duty cycle is limited by various aspects, it cannot meet the requirements of ultra-low power consumption; 2. The energy consumption between nodes is unbalanced

[0006] As a further optimization and improvement of the LPL protocol, although the WiseMAC protocol and the SP protocol can use a very short preamble field when sending some data packets, which greatly saves the energy of the sender, but because it not only has the problem of clock drift, but also It is invalid for broadcast packets, so its appropriate degree of improvement has higher energy-saving performance in the burst data environment, but not in other environments, and it is still difficult to meet the requirements of ultra-low power consumption

[0007] In addition, protocols such as LPL, improved WiseMAC, and S-MAC were all developed before the 802.15.4 standard was proposed. At that time, the popular RF chip was CC1000 from chipcon. Implemented on standard RF chips (such as CC2420, CC2430, etc.)

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