ZigBee-based double-rate superframe scheduling method

A scheduling method and dual-rate technology, applied in power management, advanced technology, access restriction, etc., can solve the problems of low power consumption of ZigBee, increase of data transmission delay, etc., and achieve good real-time performance, large duty cycle, The effect of low duty cycle

Active Publication Date: 2011-05-25
ZHEJIANG UNIV
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Problems solved by technology

However, in the single-rate superframe mode, if the superframe period is too long, although the energy consumption is guaranteed, the data transmission delay will also increase; if the superframe period is too short, although the real-time performance of the data is guaranteed , but lost the advantages of ZigBee low power consumption

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  • ZigBee-based double-rate superframe scheduling method
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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings, and the purpose and effect of the present invention will be more remarkable.

[0028] 1. Explanation of the meaning of the schematic diagram

[0029] Such as figure 1 As shown, the nodes in the network under the ZigBee standard are divided into three categories, including coordinator nodes, router nodes and terminal nodes. The coordinator node publishes the network, the terminal node can only join the network, and the router node joins the network and can receive the addition of other nodes except the coordinator. In the schematic diagram, the network forms a Cluster-Tree topology, which is divided into 7 clusters and numbered respectively. The newly added node forms a parent-child relationship with the node that receives it, for example, cluster head No. 7 is the child of cluster head No. 4. The path for the data of a single node to be transmitted to the coordinato...

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Abstract

The invention discloses a ZigBee-based double-rate superframe scheduling method, which comprises the following steps that: a wireless sensor network built on the basis of ZigBee standards operates in a low-rate superframe mode with a lower duty ratio; when a target enters the monitored area of a wireless sensor network node, the node detecting the target switches to a high-rate superframe mode, all router nodes on a path from the node to a ZigBee root node switch to the high-rate superframe mode at the same time and thus, a high-rate superframe mode transmission path from the area in which the target appears to the root node of a coordinator is formed to realize the real-time transmission of data; and nodes not detecting the target continue operating in a low-rate superframe mode. Under the condition that the target appears, the whole network applies a double-rate superframe communication mechanism. With the movement of a target, a new double-rate area moves constantly, so that the real-time monitoring of the target is performed under a condition of guaranteeing low power consumption of the network.

Description

technical field [0001] The invention belongs to the field of wireless sensor networks, in particular to a ZigBee-based dual-rate superframe scheduling method. Background technique [0002] With the rapid development of personal area networks, wireless communication protocols for this field have emerged, such as WIFI, Bluetooth, and ZigBee standards. As a low-power, low-cost communication protocol, the ZigBee protocol standard quickly occupied the market. Many chip manufacturers joined the ZigBee Alliance, which played a role in promoting the rapid development of ZigBee. In view of such advantages of ZigBee, when ZigBee is applied to various fields, its low-cost feature becomes more and more obvious. [0003] But in the mobile target tracking application, the application of ZigBee has produced difficulties. When the target does not appear, the mobile target tracking system should be in the target monitoring state, which may last for one month, two months or even one year. U...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W48/10H04W52/02
CPCY02D30/70
Inventor 王智陈善涛周良毅卓书果李元实
Owner ZHEJIANG UNIV
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