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Video Surveillance in WLAN by guard summer
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Video Surveillance in WLAN |
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Business,Electronics,Science & Technology
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Wireless LAN (WirelessLocal-AreaNetwork, WLAN) can provide an Ethernet or Token network functions without using the traditional cable simultaneously.Typically wired computer network LAN transmission medium depends copper or fiber optic cable network, but in some cases limited wiring: large projects and rerouted wiring, and the wiring is easy to damage or aging of the various nodes in the LAN immovable . Especially when you need to connect multiple nodes distance up the laying of a dedicated communication line construction difficult, costly, time-consuming, which is rapidly expanding networking needs has become a serious obstacle. With the rapid development of video surveillance, a simple wired network can not fully meet the demand, nor the most economical way. Usually in network construction project, the construction cycle longest and greatest impact on the surrounding environment is the network cabling project.In the wired network construction process, often requires Poqiang digging, pipe threading frame. The biggest advantage is the wireless LAN eliminates or reduces the workload of network cabling, usually just install one or more access points AP (accesspoint) device, you can establish a local area network covering the entire building or area. In a wired network, network equipment placement will be limited network information point position. And after the completion of the wireless LAN in the coverage area of?the wireless network to any location can access the network. Wired network lacks flexibility, require network planners to consider possible future development needs, it often leads to a large number of construction workers preset lower utilization of information points. Once the development of the network beyond the design and planning, we have to spend more costs for network transformation, and the wireless LAN to avoid or reduce the occurrence of such situations. There are a variety of wireless LAN configuration, the flexibility to choose according to need. Thus, the wireless LAN can handle only a few users from small LANs to a large network of thousands of users, and can provide as roaming and other cable networks can not provide. Mentioned wreless monitoring, we are most likely to think of a word is interference.Wireless monitoring has brought us convenience has become increasingly apparent, but also deepened the fear of interference, whenever we monitor the signal that there is no clear question, we will consider is not possible interference problems. Avoid signal interference with the role of the peripheral device or similar devices. This interference signal is a signal source may be a normal signal source within our system may be due to the same or similar frequency, causing the receiver to receive the same signal, or the received signal is difficult to identify the receiving terminal. For this case, we can adjust the frequency wireless devices, select a clean channel, or change the transmitter or receiver of a wireless device location, distance between devices. Buildings for the transmission of wireless signals with no small debilitating effect. When any object passing through the wireless signal, which radio frequency signals will occur some refraction, so that the occurrence of a transmission direction of the change, and will cause signal reflection and attenuation. If you encounter a metal object in the dissemination of the case, will also increase the attenuation of the signal. Therefore, when choosing the location of a wireless device installed, try to be in the middle unobstructed, intermediate visual transmitter to the receiver, thus avoiding the attenuation of the microwave signal, the monitoring center can receive wireless signal of high strength, thereby improving monitoring results.
Related Articles -
wreless monitoring, video surveillance, wireless LAN,
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