Real-time communication optimizing method and equipment orienting to cyber-physical system

Abstract

The invention relates to a real-time communication optimizing method and equipment orienting to a cyber-physical system. The method comprises the following steps of: reading a beacon frame and entering a CAP (Contention Access Period); judging whether the CAP of a superframe is finished or not; judging whether a node equipment cache region has data ready to transmit or not; setting frame priority; when no data needs to be transmitted in the cache region, turning to the idle mode; after the CAP is finished, entering a CFP (Contention Free Period) of the superframe; switching the node equipment into GTS (Guarantee Time Slot) allocation with collision avoidance; judging whether data transmission is successful or not; leading a node to enter a dormancy period and wait for the next superframe; and transmitting alarm information to a coordinator by the node and informing a message of transmission failure. The equipment comprises a frame priority setting module and a collision avoidance allocating module. The invention improves the expression performance of a GTS mechanism again by solving the problem of collision, finally improves the utilization ratio of GTS and meets the application with higher real-time requirement.

Description

technical field [0001] The present invention relates to a technology related to a time slot guarantee mechanism for information acquisition and real-time communication in an information-physical fusion system, especially for a time slot guarantee mechanism for sensor node communication in an information-physical fusion system with high implementation requirements ( GTS) time slot performance optimization method and device. Background technique [0002] With the State Council (2010) No. 32 Document "The Decision of the State Council on Accelerating the Cultivation and Development of Strategic Emerging Industries", the new generation of information technology industries such as the Internet of Things are listed as national strategic emerging industries, and there are more and more information-physical fusion systems be applied to social production and life. On the one hand, the application of information-physical fusion system can improve economic benefits and greatly save co...

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Problems solved by technology

In addition, the application of the current GTS mechanism is mostly studied in the star topology, while in the network application of the tree topology, due to the particularity of the topology, the topology is an extension of the bus structure. It is formed by adding branches on the bus network. Its transmission medium can have multiple branches, but it does not form a closed loop. It can also be regarded as a superposition of a star structure, which may produce a network that does not exist in a star topology. The "GTS Collision Phenomenon"

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