TCP protocol

First of all,the network communication based on TCP protocol is established between terminal board and control interface by using sockets.I want a pair of cheap nike shoes. Then multi-tasking system is achieved by using multi-threaded technology.How much do these cheap straighteners cost?This system is an integration of several terminal function modules,such as short message transmission,devices controlling,monitoring of environmental parameters,emergency calling.In data transmission,an application layer data message format is designed in order to carry different types of information structure.The process of sending and receiving this message format is also designed.Everyone wants to get cheap Lacoste Shirts .In the message sending threads of different functions,a kind of message queue is designed to keep in information structure temporarily.The input and output of message queue is designed by using mutex and semaphore so as to realize thread exclusion and synchronization.After designing and debugging of this date terminal system,we make a real test in the coal mine tunnel underground.Firstly,functional tests are carried out to verify the feasibility of this system.And then we make an analysis of packets captured through the communication of the wireless date terminal,to receive the process of communication and the scope in which this date terminal can by well used.
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