Research On Hybrid Networking Of Power Line Communication And Short-range Wireless Communication

The development of smart grid calls for the construction of reliable,stable,flexible and convenient smart grid architecture.The communication networks,which is two-way,real-time and reliable,is an important part of the smart grid.The power line communication(PLC)and micropower wireless communication have been widly applicated in electric power system.It's needn't to rewire and easy installation in the PLC.However,there is more noise and it easily be affected by the load.It is convenient to install the wireless communication and it won 't be affected by the load fluctuation.It's easily affected by the environmental factors and the penetration ability is poor.The PLC and wireless communications have complementary advantages,the research of two kinds of technology hybrid networking has a certain practical significance.This dissertation addresses the PLC and wireless communication hybrid network technology based on relaying.A relay communication module is designed,which has the advantages of PLC and Zigbee communication mode.Relay communication module can realize the complementation of the two kinds of communication mode and it is suitable for hybrid communication network system.It also has functions of PLC and wireless communication link RSSI analysis and calculation.Relay selection is a key issue in the field of collaborative communication,the selection of relay node will affect the performance of the system.An adaptive relay selection algorithm based on RSSI is put.The algorithm use RSSI as the choice indicator of communication link,choice relay nodes and communication mode intelligently.Using complete trunking communication module built the hardware test platform according to the evaluation index of the packet loss rate.The test results show that the relay communication module can choose relay nodes and communication mode adaptively according to the communication quality of the link with the algorithm based on RSSI.And the reliability of hybrid communication system is improved.Finally,as for the loss of data due to data conflict on the receiving end.The option based on the node number of PLC and wireless link is proposed in this paper.Research on data aggregation in the network layer of the PLC and wireless communication,and the MAC layer of the PLC and wireless communication aggregation technology is discussed.