Engineering Design Of Wireless Control And Command System For Building Internal Security

Control and command system for building internal security is one of the high-speed information transmission channels and the communication platform of the whole building security,which can realize the effective communication between the decision-making department and the action organization in the process of dealing with the building management affairs.At the same time,due to the ability to meet the real-time monitoring of buildings and timely grasp of the status of the scene,the system is widely used in hotels,office buildings,commercial centers and other fields.With the continuous development of China’s economy,people’s demand for internal security dispatching command system is becoming more and more diversified,and the important value of the system is becoming more and more prominent.WLAN-based(Wireless Local Area Networks)wireless control and command system for building internal security can meet the need of professional communication by the function of half-duplex single call and group call;at the same time,wireless command and dispatching system for building internal security can achieve full coverage of building signals and make video,SMS(Short Message Service)and files and other multimedia data transmission.Therefore,it is of great practical value to complete the engineering design of wireless command and command system for building internal security.Based on summarizing the development of the internal and external control and command system for building internal security.First of all,performance requirements and functional requirements of the wireless control and command system for building internal security is given according to the composition of the system and the current situation of the network deployment.Then,the indoor broadband power line carrier communication scheme is designed according to the principle of power line carrier communication based on OFDM(Orthogonal Frequency Division Multiplexing),which solves the problem of part of the building without wireless signal by prohibited wiring.Next,the topology of core network in the control and command system in Science Building is designed according to core network architecture of the wireless control and command system for building internal security,and plan the system’s network address.And the coverage of AP(Access Point)is calculated,the construction of wireless access point in Science Building is designed and the wireless channel assignment of AP on each floor is given according to the WLAN outdoor channel transmission loss model and WLAN indoor channel transmission loss model.Finally,InSSIDer,Xshell and other software tools can be used for the system coverage testing and functional testing.The test results show that the engineering design of wireless command and command system for building internal security can realize the full coverage of the wireless signals in the building,satisfying functional needs of registration,single call,group call,video call,call transfer,other call,dispatch station,picture and file transmission,short message transmission,terminal local management,network management and other functional requirements.