Design And Implementation Of Instant Communication Subsystem For Wearable Communication Operation And Maintenance

Nowadays,with the rapid development of smart grid,power communication network is an indispensable and important component.The quality and efficiency of on-site operation and maintenance of power communication network is directly related to the stability of power communication network and smart grid.At present,the on-site operation and maintenance environment of the power communication network is complex,and the existing operation and maintenance management mode lacks real-time operation and maintenance data interaction methods.In the process of on-site operation and maintenance operation decision-making and execution,there are problems of in-situ link loss and inconvenient interaction of operation and maintenance information,resulting in the on-site operation and maintenance of the power communication network is inefficient and the quality of operation and maintenance operations cannot be guaranteed.On the other hand,the on-site operation and maintenance of the power communication network is mostly carried out by professionals in the operation and maintenance of the profession.The operation and maintenance operations can only rely on personal experience and local information.Therefore,the quality of operation and maintenance operations is determined by the quality of the operators themselves.The Victorian staff lacks real-time guidance from technical experts or assistive systems.Therefore,research on the instant messaging subsystem for wearable operation and maintenance has extremely high theoretical value and application significance.The on-site operation and maintenance environment of the power communication network is complex,the network channel is unstable,especially the mobile network,and the quality of the network link fluctuates greatly,which restricts the efficient implementation of the instant communication subsystem to a certain extent.Therefore,this thesis studies the real-time communication of wearable operation and maintenance,and proposes an adaptive video streaming rate control strategy for on-site operation and maintenance.Based on this,the design and implementation of instant communication module and file transmission are further realized.The instant messaging subsystem of the module.The details are as follows:In the process of instant communication,the transmission rate of audio and video streams cannot adapt to the complex and variable network environment.This paper proposes an adaptive video streaming rate control strategy based on WebRTC(Web Real-Time Communications).Firstly,at the receiving end of the video stream,a new scheme for dynamically adjusting the threshold is proposed,and the threshold value and the overload detection signal adapted to the current network link quality are calculated,and the transmission rate is adjusted based on the overload detection signal.The result of the calculation is then returned to the sender of the video stream.At the same time,at the transmitting end of the video stream,a new transmission rate is calculated based on the packet loss rate and the transmission rate of the previous frame data.Finally,based on the results calculated by the sender and the receiver,the actual transmission rate of the next frame of data is calculated.Simulation experiments show that the proposed transmission rate control strategy can effectively reduce the network delay and packet loss rate,and the performance is stable under various network environments,effectively adapting to the complex and variable power communication field operation and maintenance.Based on the above algorithm research,this paper designs and implements an instant communication subsystem for wearable communication operation and maintenance.The subsystem designs a multi-party interconnection communication architecture based on XMPP protocol,and develops signaling server and realizes text data stream communication by using core functions such as connection management,message parsing,message routing and message transmission of Openfire server.On this basis,the application of WebRTC technology realizes point-to-point video data stream communication between the wearable terminal and the operation and maintenance platform.The instant messaging subsystem focuses on the adaptive video streaming rate control module,instant messaging module and file transfer module.The adaptive video stream transmission rate control module mainly implements the WebRTC-based adaptive video stream transmission rate control strategy in the instant messaging system,reduces the network delay in the audio and video call process,and ensures the audio and video call quality;The audio and video call function,the system based on WebRTC technology establishes a P2P direct data channel between the clients,and completes real-time video communication based on this channel.In addition,the system will also implement a real-time collaboration server based on Openfire.The server is responsible for providing services to the clients connected to it,such as forwarding the commands for opening/closing sessions for the communication parties,and the metadata of the m edia files(encoding format).For the file transfer module,the system adopts the transit mode of the service server.The service server first obtains the file sent by the sender and performs data persistence management on the file,and then sends the file to the file receiver.The test results show that the instant messaging subsystem has good stability and reliability,and can effectively support the on-site operation and maintenance of the power communication network.