Study Of Communication Technology Of Cyber-Physical System In Building Environment

In this thesis, a framework model of building environment was constructed based on Cyber-Physical System, and study on its communication technology was conducted. The game theory was introduced into CPS communication resource allocation, and the CPS communication resource allocation algorithm based on game theory was put forward, which increased the efficiency of communication resources effectively. Then the architecture of building environment CPS communication platform based on ZigBee and Mesh was built, and the communication interface was designed. Finally, CPS a three-dimensional centroid location was proposed in the building environment, which improved the positioning precision of the building environment. The CPS was introduced into building environment in this thesis, which had raised the level of the intelligent building to a certain extent. Simultaneously, CPS was improved further.Firstly, the concept, characteristics, related technical support, and proposed the structure model of CPS were introduced. On the basis of the CPS, building environment CPS structure model was put forward combining with the architectural environment. Then its design goal architecture and the overall design scheme were expounded, and a detailed introduction of function characteristic was given about the physical layer, network layer, service layer, application layer.Secondly, some concepts were introduced, such as game theory, the basic elements, the definition of cooperative game and non-cooperative game, Nash bargaining solution, pareto optimality, Nash equilibrium, and other important concepts. Then the CPS communication resource allocation algorithm based on game theory was put forward combining with the CPS. The CPS OFDMA resource allocation algorithm and wireless Mesh network channel allocation based on game theory were discussed. In the OFDMA resource allocation algorithm, the CPS OFDMA down link of multi-user network resources allocation was in focus, which made the allocation process as a cooperative game between the users through solving the Nash Bargaining Solution and achieving the Pareto optimality between users. While in the W-CABG, WMN channel allocation problem was in focus, which solved the Nash Equilibrium between the users, and the convergence of the algorithm was proved. Simulation results indicated that the above algorithm which achieved the effective integration of game theory and CPS communication resource allocation has obtained favorable effect,Thirdly, the building environment CPS wireless communication platform architecture was built based on ZigBee and wireless Mesh network. Then the demand of the network, network capacity, and the channel allocation scheme were analyzed. Then the communication interface of building environment CPS was designed. With CC2530 chip as the core, the peripheral circuit, simulators interface module, power management module and user interface module were designed.Finally, the study of localization algorithm of the building environment was conducted on the building environment CPS communication platform. An algorithm which is combined LANDMARC algorithm with the centroid algorithm in three-dimensional space was proposed. Simulation proved the feasibility of the algorithm which improved the positioning precision of the building environment through arranging RFID tags reasonably.