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Media access control (MAC) protocol method for wireless sensor network

A wireless sensor and network technology, applied in transmission systems, electrical components, etc., to achieve the effect of solving delays

Active Publication Date: 2012-07-04
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problem of node data transmission delay existing in the existing S-MAC protocol method, the present invention proposes a wireless sensor network MAC protocol method

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  • Media access control (MAC) protocol method for wireless sensor network
  • Media access control (MAC) protocol method for wireless sensor network
  • Media access control (MAC) protocol method for wireless sensor network

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Embodiment Construction

[0014] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0015] The S-MAC protocol method of the present invention first dynamically sets the wake-up half-period time according to the node communication throughput, which is used to measure the amount of data successfully transmitted between the sending and receiving nodes within a given time. The method specifically includes the following steps:

[0016] Step 1: Set the threshold of the first listening times of the wake-up cycle and the threshold of the second listening times of the wake-up cycle;

[0017] Step 2: The node timer starts the wake-up half-cycle of the node and enters the listening time of the wake-up half-cycle, and judges whether the number of continuous non-activation event listening times reaches the set first listening time during the w...

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Abstract

The invention discloses a media access control (MAC) protocol method for a wireless sensor network, which includes the following steps: step 1 a first interception time threshold of a wake cycle and a second interception time threshold of a wake cycle are set; step 2 a node timer starts a semi-wake-cycle of a node to enter interception time of the semi-wake-cycle and judges whether interception times of continuous non-activation events reach the first interception time threshold in the interception time of the semi-wake-cycle, and if the interception times reach the first interception time threshold, the semi-wake-cycle is prolonged by 1.5 times. The sensor MAC (S-MAC) protocol method reduces corresponding shifting degree of lower-layer network node moving time and upper-layer node moving time, node data transceiving of an upper layer and a lower layer can be responded timely, extension of a plurality of nodes enables data to be forwarded fast, and a delay problem caused by node dormancy in a traditional S-MAC protocol method is solved.

Description

technical field [0001] The invention belongs to the field of wireless sensor network data transmission, in particular to a wireless sensor network MAC protocol method. Background technique [0002] The MAC protocol is a protocol that defines how data frames are transmitted on the medium. It is located in the data link layer of the OSI seven-layer protocol and is mainly responsible for controlling and connecting the physical medium of the physical layer. When sending data, the MAC protocol can judge in advance whether the data can be sent, if it can be sent, it will add some control information to the data, and finally send the data and control information to the physical layer in a specified format; when receiving data, MAC The protocol first judges the input information and whether there is a transmission error. If there is no error, the control information is removed and sent to the LLC layer. [0003] Currently in the field of wireless sensors, the S-MAC protocol method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08
Inventor 陈少华曾洁李桂林
Owner DALIAN JIAOTONG UNIVERSITY