Wireless sensor network data transmission method

A network data transmission, wireless sensor technology, applied in the field of sensor network

Inactive Publication Date: 2013-03-20
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In X-MAC, sudden link changes may brin

Method used

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  • Wireless sensor network data transmission method

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Embodiment Construction

[0039] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0040] All nodes in the network wake up and sleep at the same period, and each node aligns the wake-up and sleep plans of other neighbor nodes to the local clock, and uses TW_LENGTH to represent the size of the previously defined acceptance window. Such as figure 2 As shown, for node i, t i ( ) indicates the last time i woke up. Node j is a neighbor of i, calculate t i ( ) and t j (·) interval between offset i (j), offset i (j) is a constant. Based on this constant and the local wake-up schedule, it is possible to calculate when the neighbor was most recently awake.

[0041] This constant offset i The calculation of (j) is based on the interrupt timestamp of the ...

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Abstract

The invention discloses a wireless sensor network data transmission method. The wireless sensor network data transmission method comprises the steps: S1 obtaining a sleep/wake plan of neighbor nodes; S2 obtaining link quality of the nodes; S3 selecting father nodes according to the link quality and the sleep/wake plan, selecting the nodes from the neighbor nodes according to the father nodes to form a candidate node set, dynamically selecting multiple nodes in the candidate mode set according to a greedy algorithm and using the nodes as next transmission nodes, and performing optimization to sending windows of the candidate nodes; and S4 utilizing the sleep/wake plan to a data pack to the father nodes when the father nodes wake. By means of the method, the transmission energy consumption of the sensor nodes is reduced, the service life of a wireless sensor network is prolonged, the rate, the success rate and the robustness of data transmission are improved, and data transmission delay is reduced.

Description

technical field [0001] The invention relates to the field of sensor networks, in particular to a wireless sensor network data transmission method. Background technique [0002] With the increasing maturity of communication, sensor manufacturing, and embedded computing, large-scale wireless sensor network technology has developed rapidly and has been widely used in many fields such as environment, national defense, disaster relief, and urban management. Most wireless sensor nodes are powered by batteries, and the lifetime of wireless sensor networks is often limited by this. In order to save energy consumption, the nodes in the network adopt the working mode of waking up and sleeping periodically, and transmit data to the terminal nodes through multi-hop. Therefore, designing an efficient data transmission protocol in a low-power wireless sensor network is an important and challenging task. [0003] The currently widely used low-power medium access control protocol is X-MAC...

Claims

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Application Information

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IPC IPC(8): H04W40/04
CPCY02D30/70
Inventor 刘云浩曹志超何源
Owner TSINGHUA UNIV
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