Design And Implementation Of Fast Meter Reading Protocol In Wideband Micropower Communication System

Under the background of the comprehensive promotion of the new round of power system reform,the continuous deepening of the construction of a strong smart grid and the continuous and profound changes in the energy pattern,the power consumption information acquisition system continues to provide a large amount of data and application support for various disciplines and systems.There are more and more data types to be collected and higher requirements for data acquisition frequency.The current meter reading protocol can’t meet the growing demand of power information collection business.Therefore,after analyzing the existing meter reading protocols,aiming at the situation that the same data items need to be collected in a certain period of time,a fast meter reading protocol is designed and implemented in the broadband micro power communication system in this thesis.Aiming at the situation that the traditional meter reading method sends meter reading commands and receives the responses in series,the fast meter reading protocol designs a task-based meter reading mode.Using the beacon mechanism of the data link layer,the central communication module sends the central beacon frame carrying the information collection entry,which is then forwarded by the agent communication module.The node automatically reports the collection response periodically according to the task requirements.When the node reports the response data,it uses the edge computing solution,which is collected and uploaded by the agent communication module layer by layer,making full use of the bandwidth resources and reducing the number of messages.In view of the low communication efficiency between the communication module and the terminal equipment when reading the electric energy meter in serial,the fast meter reading protocol designs a pre-reading process.After the node receives the meter reading command,it reads the electric energy meter in advance and stores the response data.When the node reporting time arrives,it directly reports the stored response data,which saves the time overhead of serial communication.In view of the low efficiency of the confirmation and retransmission mechanism of the traditional meter reading method,the fast meter reading protocol is designed to retransmit through the standby node and starting the route repair process.Further,using the test platform to simulate the objects in the meter reading process,write test examples to test the functions of each communication module respectively,and verify the consistency between the code implementation and the protocol design.Finally,using the laboratory hardware conditions,the interoperability test is carried out in the seven node two-layer network.The traditional meter reading protocol and the fast meter reading protocol proposed in this thesis are used to collect data from the network for 300 times respectively.The results show that compared with the traditional meter reading,the acquisition frequency of fast meter reading is greatly improved,the success rate is as high as 100%,and the bandwidth utilization is increased by about 9times.With the increase of network scale,node level and the number of reading items,compared with the traditional meter reading methods,the fast meter reading protocol will theoretically achieve better performance improvement.