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Method for evaluating multi-time scale link of wireless sensor network

A wireless sensor, multi-time scale technology, applied in wireless communication, using return channel for error prevention/detection, electrical components, etc., can solve problems such as asymmetry, instability, etc., to reduce the number and improve the packet reception rate , the effect of reducing the average path length

Inactive Publication Date: 2013-05-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of instability and asymmetry existing in the existing link estimation method, the present invention proposes a wireless sensor network multi-time scale link estimation method

Method used

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  • Method for evaluating multi-time scale link of wireless sensor network
  • Method for evaluating multi-time scale link of wireless sensor network
  • Method for evaluating multi-time scale link of wireless sensor network

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Experimental program
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specific Embodiment approach 1

[0017] Specific implementation mode 1. Combination figure 1 In this embodiment, the wireless sensor network multi-time scale link estimation method, the working process of each node is as follows:

[0018] Step A, waiting to receive the data packet of the wireless sensor network, if the data packet of the wireless sensor network arrives, then perform step B, otherwise, keep the receiving state;

[0019] Step B, receiving the data packet of the wireless sensor network, judging the type of the received data,

[0020] If the received data is a beacon frame, then perform step C; if the received data is an ACK confirmation packet, then perform step D; if the received data is a normal data packet, then perform step G; if the received data is a burst Send a data packet, then perform step H;

[0021] Step C, the node obtains the neighbor node information of the node according to the received beacon frame, and updates the long-term link estimation value and the short-term link estima...

specific Embodiment approach 2

[0033] Specific embodiment two, combine figure 2 and image 3 Describe this implementation mode, this implementation mode is a further description of specific implementation mode 1, 1) Case 1: the parent node of the sending node is the neighbor node of the bursty node and the link quality between nodes is better, see figure 2 .

[0034] The normal data sending path of node 1 is 1→2→3→sink. When node 1 finds that node 3 can perform opportunistic routing, it selects the path 1→3→sink for data forwarding. After receiving the data, node 3 can obtain the ID of the parent node of the sending node as 2. If node 2 is its neighbor node, it can send ACK confirmation character signals at the same time through two paths 3→1 and 3→2→1, so that Mitigate the loss of ACK confirmation character signal caused by poor link quality of 3→1.

[0035] 2) Situation 2: The parent node of the sending node is the neighbor node of the burst node but the link quality between the nodes is poor or the ...

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Abstract

The invention provides a method for evaluating a multi-time scale link of a wireless sensor network, relating to the field of the wireless sensor network. The work process of each node comprises the following steps of: receiving a data packet of a wireless sensor network and judging the type of the received data. The method is divided into four solutions, wherein a first solution comprises the following steps of: taking the received data as a beacon frame, judging whether an ACK confirming packet is transmitted to the wireless sensor network, judging whether an object node and a father node are neighbor nodes, judging the communication status, and transmitting an ACK confirming character signal; a second solution comprises the following steps of: taking the received data as an ACK confirming character signal, judging whether an object node and a father node are neighbor nodes by a node according to the content of the ACK confirming character signal, judging the communication status, and transmitting an ACK confirming character signal; a third solution comprises the following steps of: taking the received data as a normal packet, and sending an ACK confirming character signal; and a fourth solution comprises the following steps of: taking the received data as a sudden packet, judging whether an object node and a father node are neighbor nodes, judging the communication status, and broadcasting an ACK confirming character signal.

Description

technical field [0001] The invention relates to the field of wireless sensor networks, in particular to a multi-time scale link estimation method for wireless sensor networks. Background technique [0002] Wireless sensor networks (WSN) have been applied to a certain extent in the fields of industry, agriculture, and environmental monitoring. In actual deployment and application, researchers have found that wireless links have unstable and asymmetric characteristics, especially for medium-quality links. The goal of routing algorithms is to maintain the connectivity of the network topology in a complex link environment and to find relatively stable and reliable communication links, and link estimation is an important part of accomplishing this goal. In order to reduce the related problems caused by link instability and asymmetric characteristics, scholars at home and abroad have done a lot of research work on link estimators, and proposed some specific methods based on the T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/08H04W40/02H04L1/16
Inventor 潘大为王少军彭宇乔立岩刘大同
Owner HARBIN INST OF TECH
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