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Zigbee information channel dynamic selection method based on real-time availability

A channel and dynamic technology, which is applied in the field of dynamic utilization of channel spectrum resources, can solve the problem that the channel is not suitable for communication channels, etc., and achieve the effect of improving the success rate of data transmission, realizing repeated utilization, and reducing the transmission failure rate and retransmission rate

Inactive Publication Date: 2011-08-31
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

In some environments with severe electromagnetic mutual interference, some channels are not suitable as communication channels

Method used

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  • Zigbee information channel dynamic selection method based on real-time availability
  • Zigbee information channel dynamic selection method based on real-time availability
  • Zigbee information channel dynamic selection method based on real-time availability

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specific Embodiment approach

[0037] figure 2 , is a schematic diagram of the ZigBee channel selection method based on real-time availability. The content of the dotted box in the figure reflects the innovation core of the present invention, that is, dynamically selects channels according to the availability ranking in the channel resource library, and utilizes the real-time availability algorithm at the same time Dynamically update channel availability. Its detailed process is as follows image 3 As shown, the process of dynamically selecting a suitable channel as a data transmission channel by a ZigBee device in a complex radio environment is taken as an example below to further demonstrate the present invention. Its specific implementation is as follows:

[0038] 1) The present invention is an algorithm for dynamically selecting channels based on real-time availability, and a channel resource library is required to represent and store the channel parameters used. Therefore, the first step of the alg...

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Abstract

The invention discloses a Zigbee information channel dynamic selection method based on real-time availability. In the invention, the concept of information channel availability is provided for the first time, the information channel availability is updated by the availability algorithm in real time, and information channels can be dynamically selected according to availability sequence in an information channel resource pool, which is marked by a broken line in the figure. Parameters for the information channel availability indicate the vacancy rate and communication quality of the information channel and show practical available conditions of the information channel. Therefore, the parameters for the information channel availability can be used for guiding selection of the information channel in practical data transmission, so as to provide a communication support, increase the data transmission success rate, and reduce the collision rate and retransmission rate to the largest extent. Based on the vacancy rate and quality of the information channel, data transmission results and other parameters, the invention provides the real-time availability algorithm. The real-time availability algorithm not only provides a high-quality vacant information channel with more selection chances, but also ensures the fairness of information channel selection to the largest extent and enables the information channel to be selected by relative fair chance, thereby improving the utilization rate of the information channel. In the invention, the strategy to build the information resource pool to manage information channel resources is provided; information channels are sequenced based on the parameters for the information channel availability; and the ZigBee information channel is selected according to the sequencing result, thereby realizing the Zigbee information channel dynamic selection method based on real-time availability.

Description

technical field [0001] This patent relates to a novel dynamic selection method of ZigBee channels based on real-time availability, which belongs to the field of dynamic utilization of channel spectrum resources. Background technique [0002] ZigBee technology is an emerging short-distance wireless communication technology, and its main application field is Low Rate Wireless Personal Area Network (LRWPAN, Low Rate Wireless Personal Area Network). Transmission rate. The ZigBee / IEEE 802.15.4 (hereinafter referred to as ZigBee) standard is established on the basis of the IEEE 802.15.4 standard. ZigBee equipment should include the MAC layer (media access control layer) and PHY layer (physical layer) of IEEE 802.15.4 ), and the ZigBee stack layer (network layer, application layer and security service provider layer). The IEEE 802.15.4 standard defines the MAC layer and the PHY layer of the OSI (Open System Interconnection) model for the ZigBee standard. The PHY layer defines th...

Claims

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Application Information

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IPC IPC(8): H04W16/10H04W16/14H04W24/00
Inventor 孙咏梅胡泽民纪越峰
Owner BEIJING UNIV OF POSTS & TELECOMM
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