Resource allocation method for coexistence of multiple linear topology industrial wireless networks

Abstract

The invention relates to a wireless network resource allocation technology, in particular to a resource allocation method for coexistence of multiple linear topology industrial wireless networks. According to the method, the coexistence problem of a plurality of TDMA-based linear topology industrial wireless networks is considered, and the method comprises three parts of scheduling delay lower bound analysis, an inter-network resource allocation algorithm and an intra-network resource allocation algorithm. According to the method, when the delay lower bound is analyzed and the resource allocation algorithm is designed, the overall scheduling delay and the resource utilization rate are used as measurement indexes, the optimal node combination is selected in each time slot to occupy channelresources as much as possible, the resource utilization rate is improved, and the overall scheduling delay is reduced.

Description

technical field [0001] The invention relates to a resource allocation method for industrial wireless networks, in particular to a resource allocation method for the coexistence of multiple linear topology industrial wireless networks. Background technique [0002] Industry 4.0, as the integration of Industrial Internet of Things (IIOT) and Cyber ​​Physical System (CPS), points out that digitization, networking and intelligence are the future development direction of manufacturing industry. As an important part of Industry 4.0, industrial wireless network is also the basis of intelligent manufacturing. Industry 4.0 has the characteristics of diverse applications, which means that a single wireless technology cannot meet the needs of diverse applications, so multiple wireless networks are required to operate within the same range. [0003] Wireless networks can be classified according to heterogeneous access mechanisms: Time Division Multiple Access (TDMA) and Carrier Sense M...

AI Technical Summary

Problems solved by technology

Due to the openness of the ISM frequency band, TDMA-based industrial wireless networks WirelessHART, ISA100.11a, WIA-PA and WIA-FA, and other wireless networks such as WiFi, Bluetooth, ZigBee, LTE-U, etc. all work in this frequency band. It inevitably leads to the coexistence problem on the spectrum

Some existing wireless coexistence standards, such as IEEE802.16h and IEEE 802.19, support multiple wireless network coexistence resource allocation from the architecture, but no specific resource allocation algorithm is given

Existing resource allocation algorithms mainly focus on the coexistence of CSMA and CSMA, and the coexistence of CSMA and TDMA. For the coexistence of multiple TDMA wireless networks, only a single channel is considered.

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