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Media access control (MAC) method applicable to wireless sensor network

A media access control and wireless sensor technology, applied in wireless communication, network traffic/resource management, sustainable buildings, etc., to achieve simple implementation, reduce energy consumption, delay time and power consumption

Active Publication Date: 2009-10-14
江苏今越控股集团有限公司
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Problems solved by technology

[0005] Technical problem: In order to solve the problems in the above-mentioned prior art, the present invention proposes a media access control method for wireless sensor networks, which enables nodes to improve the performance of the protocol under variable data flow conditions, and does not require On-line adjustment of period and duty cycle to avoid synchronization difficulties

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  • Media access control (MAC) method applicable to wireless sensor network
  • Media access control (MAC) method applicable to wireless sensor network
  • Media access control (MAC) method applicable to wireless sensor network

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Embodiment Construction

[0017] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific implementation examples.

[0018] The flow adaptive medium access control method in the wireless sensor network of the present invention, its overall operation process is as follows figure 1 As shown, the node detects the current data buffer queue length N cur For adaptive adjustment, when N cur When >1, the high-flow adaptive mechanism is enabled, and when N cur ≤1 and the current measured data flow L k When <β, the low-flow adaptive mechanism is enabled, otherwise, the communication is carried out by sending a data packet each time in the traditional MAC protocol. Among them, β is a preset threshold, and its value is determined according to specific network conditions.

[0019] The specific method of data flow measurement is: the node continuously records the arrival time of data packets, and takes the reciprocal of the time i...

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Abstract

The invention provides a media access control (MAC) method applicable to wireless sensor network, which can adjust the sending process according to the characteristic that the data traffic of the node is time-varying in the specific application of the wireless sensor network. The MAC method comprises the following steps: estimating the current data traffic intensity by measuring the time intervals of data packet arrivals, and adopting a filter to reduce the interference in the measurement; carrying out the self-adaptive control by detecting the queue length of the current data packet of the node, if the queue length of the data packet is larger than 1, batch-sending the data packets in the queue in a burst-transmission manner so as to reduce delay and energy consumption, and if not, judging by the currently measured data traffic; and if the current data traffic value is smaller than the given threshold, enabling the low-traffic self-adaptive mechanism, and if not, removing unnecessary wake-up cycles by the node. The method dispenses with the on-line adjustment of the cycle and the duty cycle of the protocol, avoids the problem of the difficult synchronization between nodes and effectively solves the major problems of the synchronization and the data traffic self-adaption in the existing wireless sensor network.

Description

technical field [0001] The invention relates to the field of wireless networks, in particular to the field of wireless sensor network protocol design, and specifically provides a flow adaptive media access control method for wireless sensor networks. Background technique [0002] In wireless sensor networks, the nodes are generally powered by batteries and their capacity is small. After the nodes are distributed in the actual application environment, the batteries are difficult or costly to replace. Therefore, energy efficiency is the focus of wireless sensor network protocol design considerations. In many application fields such as fire detection, nodes need to send the collected data to the sink node in time and take necessary measures to reduce losses, which requires a high delay time for protocol design. [0003] At present, in the design of wireless sensor network MAC protocol, nodes generally adopt periodic listening and sleep scheduling to reduce energy consumption. T...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/02H04W28/10
CPCY02B60/50
Inventor 姚国良刘昊陈昊
Owner 江苏今越控股集团有限公司
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