A Congestion Control Method for Wireless Sensor Networks

A wireless sensor, network congestion technology, applied in wireless communication, data exchange network, network traffic/resource management, etc., can solve the problems of fixed, not well adapted to wireless sensor network environment, full queue and service flow deadlock parameters, etc.

Inactive Publication Date: 2020-07-14
JILIN UNIV
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Problems solved by technology

[0014] The technical problem to be solved by the present invention is to overcome the problem of continuous full queue and deadlock of service flow to cache in the prior art, as well as the fixed parameters of the traditional PI method and the problem that it cannot be well adapted to the wireless sensor network environment, and provides a Congestion Control Method for Wireless Sensor Networks

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  • A Congestion Control Method for Wireless Sensor Networks
  • A Congestion Control Method for Wireless Sensor Networks
  • A Congestion Control Method for Wireless Sensor Networks

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Embodiment

[0179] The simulation conditions are as follows:

[0180] see Figure 5 , in order to check the performance of a wireless sensor network congestion control method (named as PNPI method) of the present invention, the PNPI method of the present invention is loaded on the NS-2 simulation platform, and the simulation uses the NS-2 of version 2.35 The platform, the operating system is Ubuntu10.04. The figure shows the simulated wireless sensor network environment built on the NS-2 simulation platform, in which the number of nodes is 14, the transmission range of the nodes is 250m, and the Media Address Control (MAC) layer of the wireless sensor network adopts 802.11 protocol, the routing protocol adopts AODV, the initial energy of the node is the default value, the node cache queue length is 40 Packets, the initial source node sends data to the sink node at a rate of 200kb / s, the packet size is 128B, the sampling frequency w=100Hz, simulation Time 50s, from 0s the source node sta...

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Abstract

The invention discloses a wireless sensor network congestion control method, in order to overcome the problem of continuous full queue and deadlock of service flow to cache in the prior art, as well as the problem that the parameters of the traditional PI method are fixed and cannot be well adapted to the wireless sensor network environment , the step of described a kind of wireless sensor network congestion control method is as follows: 1) the definition of relevant parameter; 2) the realization of PI method; 3) adopt single neuron control technology to the improvement of PI method, the improved after this step The method is named as the NPI method; 4) The improved particle swarm optimization algorithm optimizes the parameters of the NPI method online: the improved particle swarm optimization algorithm optimizes the fixed parameter K in the NPI method P 、K I The initial value and learning rate η of 1 , η 2 Perform online optimization, adjust the weight of a single neuron online through real-time correction, and the obtained method is named PNPI method; 5) Actively discard packets with the discard probability p(k), before the queue buffer overflows, actively discard Bag.

Description

technical field [0001] The present invention relates to a management method related to wireless sensor network congestion control, and more particularly, the present invention relates to a wireless sensor network congestion control method. Background technique [0002] In recent years, wireless sensor network technology has developed rapidly, and its application fields have become wider and wider, and the requirements for wireless sensor networks have become higher and higher. The consequent wireless sensor network congestion problem is also increasingly prominent. Wireless sensor network congestion mainly has the following problems: [0003] (1) Node-level congestion: that is, the packet traffic that the node needs to send exceeds the node's sending capacity, resulting in node queue buffer overflow, resulting in the loss of data packets and an increase in network queuing delay. [0004] (2) Congestion at the wireless link level: the wireless channel is a shared channel, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/02H04L12/823H04L47/32
CPCH04L47/326H04W28/0289
Inventor 杨晓萍夏日婷王萍李娟
Owner JILIN UNIV
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