Media access control method for wireless sensor network

A media access control and wireless sensor technology, applied in transmission systems, electrical components, sustainable buildings, etc., can solve problems such as energy consumption, low protocol performance, and time consumption, and achieve network delay time and data packet delivery rate improvement Effect

CN101296249AInactive Publication Date: 2008-10-29SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2008-10-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a media access control method for a wireless sensor network, which is applicable to the field of wireless network design; wherein, network nodes are divided into cluster-head nodes and ordinary nodes; an operational process runs in a periodic mode and an operation cycle is divided into four stages, namely a synchronization stage, a data stage, a sleep stage and a request stage; the specific operational process comprises: the ordinary nodes send data traffic and routing information to the cluster-head nodes in the request stage of each cycle; the cluster-head nodes calculate the cycle length and the duty radio and send the cycle length and the duty radio to the ordinary nodes in the synchronization stage of the next cycle; the ordinary nodes receive a synchronization package, set own cycle length and duty radio and update the local time in the synchronization stage, carry out data communication in the data stage and enter a sleep state to reduce power consumption in the sleep stage. The method of the invention effectively solves the problems in the present wireless sensor network, namely the synchronization and the self-adaption of data traffic, reduces the energy consumption of nodes and the delay time of data packages and increases the transmissibility of data packages at the same time.
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Description

technical field

[0001] The present invention relates to the field of wireless network, especially to the field of wireless sensor network and protocol design, specifically provides a medium access control method for wireless sensor network, although the given features can be applied to other network designs. Background technique

[0002] In a wireless sensor network, the nodes are generally powered by batteries and their capacity is small. After the nodes are distributed in the actual environment, the batteries are difficult to replace. Therefore, energy is the focus of protocol design, followed by important factors such as delay time and data transmission rate. The MAC protocol in wireless sensor networks is one of the keys that affect the above performance.

[0003] At present, in the design of wireless sensor network MAC protocol, nodes generally adopt periodic listening and sleep scheduling. A running cycle has a fixed length and is divided into two parts, listening and...

Examples

Embodiment Construction

[0025] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific implementation examples.

[0026] The operation cycle of the media access control method for wireless sensor networks is divided into four stages: synchronization, data, sleep, and request. The length of the synchronization, data, and request stages is fixed, and the sleep stage time can be adjusted. Adjusting the length of the sleep stage can be adjusted. period length and duty cycle purposes. The specific cycle operation process is:

[0027] ① The cluster head node sends a synchronization packet during the synchronization period, and the common node receives the synchronization packet sent by the cluster head during the synchronization period and sets its own cycle length, duty cycle, and local time according to the information in the synchronization packet.

[0028] ②In the data phase, the node that successfully competed in the ...