A Method of Adaptively Adjusting Duty Cycle Based on Energy Residual in Sensor Networks
A sensor network, adaptive adjustment technology, applied in the direction of energy reduction, advanced technology, power management, etc., can solve the problem of poor network performance, improve performance, reduce network delay and packet loss rate, reduce delay and packet loss rate effect
Active Publication Date: 2016-04-20
CENT SOUTH UNIV
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However, the downside is that since each node adopts a duty cycle that only meets the minimum requirements of the application, although it can save energy, the performance of the network is not as good as the first method
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[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0026] Such as figure 1 As shown, in the existing wireless sensor network with the same duty cycle, the loads borne by the nodes at different distances from the Sink are very different. At this time, the energy consumption in different areas of the network is also very different, so the nodes in the far Sink area have a lot of energy left (see figure 2 ).
[0027] The present invention is based on the method for adaptively adjusting the duty cycle of the energy residue in the sensor network, and divides a sensor node closest to the base station node (Sink) in the wireless sensor network into a near-end node (the distance to the base station node is x 0 ), the other sensor nodes are divided into remote nodes; the near-end nodes are set to adopt a duty cycle that meets the data transmission requirements of the entire wireless sensor ...
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The invention discloses a self-adaptive duty ratio adjusting method based on residual energy in a sensor network. The method comprises the steps that a sensor node, nearest to a base station node, in the wireless sensor network is set as a near end node, and other sensor nodes are set as far end nodes; the near end node with the duty ratio meeting the data transmission requirement of the whole wireless sensor network is set to work, the work duty ratio of the far end nodes is larger than the duty ratio of the near end node, and the energy consumption of the far end nodes is smaller than that of the near end node. According to the self-adaptive duty ratio adjusting method, the performance of an existing sensor network can be effectively improved, the delay and packet loss probability of data routing on the node are reduced, and therefore the network delay and the packet loss probability are reduced on the whole; meanwhile the energy consumption of the largest energy consumption node will not be increased, and therefore the network service life is not affected.
Description
technical field [0001] The invention relates to a medium access control (medium access control, MAC) method for a synchronous wireless sensor network, in particular to a method for adaptively adjusting a duty cycle based on energy residual in a sensor network. Background technique [0002] A wireless sensor network is a wireless network composed of a large number of sensor nodes that communicate with each other through multi-hop wireless links and in a self-organizing and multi-hop manner, and wireless sensors are often powered by batteries as their energy source, so How to rationally utilize and allocate energy consumption is very important. [0003] In wireless sensor networks, in order to reduce the energy consumption of nodes, a method is usually adopted to make nodes work (work) and sleep (sleep) periodically. The ratio of the time a node is in the working state to the cycle time in a cycle is called duty cycle. Because the energy consumption of the sensor node in the...
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IPC IPC(8): H04W52/02H04W72/04
CPCH04W52/0248H04W52/30Y02D30/70
Inventor 龙军刘安丰何岸张金焕
Owner CENT SOUTH UNIV