Scheduling method of reliable transmission of mixed data streams in industrial wireless sensor network

Abstract

The invention relates to a scheduling method of reliable transmission of mixed data streams in an industrial wireless sensor network, a gateway allocates time slots for periodic data and non-periodicdata sent by each field device, and the time slots are used for each field device to complete data transmission according to the time slot allocation, allocation comprises the following steps: modelling for the periodic data and the non-periodic data; reserving the time slots for the non-periodic data through a cyclic statistics method; and allocating the time slots for the periodic data. The method provided by the invention takes data transmission reliability and fairness as indexes for measuring performance of the scheduling method, reserves the time slots for the non-periodic data through the cyclic statistics method, allocates the time slots for the periodic data through an even allocation method, comprehensively considers a waiting mechanism and a seizing/discarding mechanism and provides an effectively scheduling scheme for transmission of the mixed data streams.

Description

technical field [0001] The invention relates to a scheduling method for industrial wireless sensor networks, in particular to a scheduling method for reliable transmission of mixed data streams in industrial wireless sensor networks. Background technique [0002] With the advancement of wireless network technology and the improvement of the performance of electronic devices, wireless sensor network technology has emerged rapidly and has been widely used in our daily production and life. Among them, industry is one of the important fields of wireless sensor network application. In industry, compared with traditional wired communication, wireless communication has the following advantages: (1) In terms of cables, there is no need to lay cables, which reduces the workload and corresponding costs, and there is no need to worry about cable wear and aging. (2) In special industrial scenarios, such as some mobile and unwiring scenarios, the use of wireless communication is undoubt...

AI Technical Summary

Problems solved by technology

[0003] However, in an industrial environment there is a large amount of interference

These interferences mainly come from two aspects: on the one hand, the drastic changes in the temperature and humidity of the industrial environment, coupled with the frequent movement of equipment and staff, make the quality of the communication link extremely unstable; on the other hand, due to the ISM 2.4GHz frequency band Openness, wireless LAN, Bluetooth, ZigBee and other wireless networks all work in this frequency band, and the interference between coexisting networks in the industrial environment is very serious

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