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Self-adaptive deterministic scheduling method for WIA-PA network

A scheduling method and deterministic technology, applied in energy-saving ICT, climate sustainability, advanced technology, etc., can solve problems such as increased power consumption, reduced frequency band utilization, interference, etc., to meet real-time requirements, improve frequency utilization, The effect of reducing system power consumption

Inactive Publication Date: 2012-07-18
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Although the deterministic scheduling mechanism given in this paper can complete the communication scheduling of the tree network, the length of each stage in the modified superframe structure is fixed, which limits the expansion of the network and cannot control the system according to the actual network situation. Power consumption; at the same time, the combined channel hopping technology solves the interference problem to a certain extent, but it also brings about an increase in power consumption and a decrease in frequency band utilization

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  • Self-adaptive deterministic scheduling method for WIA-PA network
  • Self-adaptive deterministic scheduling method for WIA-PA network
  • Self-adaptive deterministic scheduling method for WIA-PA network

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[0022] In order to make the purpose of the present invention, technical solutions and advantages clearer, the present invention will be described in further detail below in conjunction with accompanying drawing:

[0023] In the WIA-PA network, all data communication between field devices is based on superframes. Superframes are a set of time slots that appear cyclically. The length of a superframe is the number of time slots, which determines the speed of the superframe cycle. The WIA-PA superframe is mainly divided into several stages: beacon, contention access phase (CAP), non-competition access phase (CFP), intra-cluster communication, inter-cluster communication and sleep.

[0024] Among them, the CAP stage is mainly used for device joining, intra-cluster management and retransmission. The CFP stage is used for communication between the handheld device and the cluster head. The types of time slots in a superframe include shared time slots and dedicated time slots, in whic...

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Abstract

The invention aims to protect a self-adaptive deterministic scheduling method for an industrial wireless sensor network applicable to WIA-PA (Wireless Networks for Industrial Automation-Process Automation) standard. According to the special environment of the industrial wireless network, together with the superframe structure, resource allocation and other parameters of the WIA-PA standard, the self-adaptive deterministic scheduling method calculates the real-time throughputs of both the transmission non-periodic data and the periodic data in the network respectively, and configures the lengths of the contention access stage, the special timeslot stage and the dormant stage in the superframe according to the present data throughput, so as to adjust the proportions of all the stages in the superframe structure in a self-adaptive manner. The method can effectively improve the bandwidth utilization ratio and lower the system power consumption.

Description

technical field [0001] The invention relates to the technical field of industrial wireless sensor networks, in particular to an adaptive deterministic scheduling method suitable for WIA-PA networks. Background technique [0002] With the development of wireless communication technology, industrial wireless sensor network technology is gradually being applied to industrial sites. The introduction of industrial wireless sensor network technology solves the problems of difficult industrial field wiring and high installation and maintenance costs. According to the real-time, deterministic, reliability and low power consumption requirements of industrial sites, scientific and reasonable network scheduling technology has become the core of the further development of industrial wireless sensor network technology. [0003] Industrial wireless WIA-PA technology (Wireless Networks for Industrial Automation - Process Automation) is a wireless network system for industrial process meas...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/02H04W72/04H04W72/12
CPCY02B60/50Y02D30/70
Inventor 王平王恒闫红波向敏陈秋歌
Owner CHONGQING UNIV OF POSTS & TELECOMM
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