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Minimum competition window strategy MAC layer channel assignment method of wireless sensor network

A wireless sensor and contention window technology, applied in the field of minimum contention window strategy MAC layer channel allocation, which can solve the problems of resource channel and energy waste, inability to send congestion, and discarding.

Inactive Publication Date: 2011-09-28
BEIHANG UNIV
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Problems solved by technology

In addition, the information successfully sent by the child node to the parent node may not be sent or even congested and discarded because the parent node cannot preempt the channel, which causes a waste of resources including channels and energy. This kind of congestion can be solved by Optimized channel allocation controlled by

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  • Minimum competition window strategy MAC layer channel assignment method of wireless sensor network
  • Minimum competition window strategy MAC layer channel assignment method of wireless sensor network
  • Minimum competition window strategy MAC layer channel assignment method of wireless sensor network

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] A minimum contention window strategy MAC layer channel allocation method of a wireless sensor network of the present invention, the minimum contention window calculation method adopted by the allocation method is based on the level and the number of child nodes in the hierarchical structure of the nodes in the wireless sensor network to calculate the minimum contention window.

[0021] In a network, all nodes transmit information to the gateway node, and the entire transmission path can be described as a propagation tree. by figure 1 Take node Z, node B, node E, and node F as examples: node B, node E, and node F respectively generate data streams and send data to node Z, and the information of node E and node F is forwarded through node B, that is, node B is Node E and Node F are the parent nodes, and Node E and Node F are the child n...

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Abstract

The invention discloses a minimum competition window strategy MAC layer channel assignment method of a wireless sensor network. In the method, a layer minimum competition window is obtained for obtaining a node minimum competition window, then, channels are assigned to the obtained node minimum competition window, and the obtained channel assignment can be matched with data carrying capacity, so that occurrence of congestion is controlled to a certain extent, network packet loss rate is reduced, network throughput is increased and network energy consumption is reduced. The layer minimum competition window strategy and the node minimum competition window strategy can be flexibly combined with other congestion control and optimization algorithms and have low complexity.

Description

technical field [0001] The present invention relates to a channel allocation method of MAC layer, more particularly, refers to a channel allocation method of MAC layer based on the minimum contention window strategy of wireless sensor network. Background technique [0002] A wireless sensor network (Wireless Sensor Network, WSN) is composed of a large number of sensor nodes with data processing and communication capabilities. The monitoring data will be sent to the gateway by way of providing it to the user for analysis and processing. WSN integrates the latest achievements of sensor technology, modern network and wireless communication technology, and distributed information processing technology. It is a frontier hot research field with a high degree of interdisciplinary and highly integrated knowledge. Wireless sensor networks have potential practical value and broad application prospects in the fields of military reconnaissance, space exploration, biomedicine, environme...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W84/18
CPCY02B60/50Y02D30/70
Inventor 刘云璐蒲菊华路岩刘伟刘睿熊璋
Owner BEIHANG UNIV
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