3 g wireless monitoring and WIFI wireless monitoring what are the similarities and differences

as monitoring the gradual development of the industry, wireless monitoring in order to save the network cabling, reduce the construction difficulty; Reduce the cost of line; Installation location is more flexible. Widely used in traffic lights control and photo transmission, the bus monitoring, highway monitoring, environment detection, vehicle-mounted mobile, fire escape, such as comprehensive emergency alarm video monitoring field. Plays an important role in today's life.

so what are the 3 g wireless monitoring and WIFI wireless monitoring substantial similarities and differences?

3 g wireless monitoring

strictly speaking, two ways are divided into 2 g and 3 g; A is earlier of the 2 g model test, the other is a try the latest version of the 3 g module.

1, 2 g wireless transmission monitoring mainly includes the CDMA, GSM two modes. This two kinds of model low hardware cost, coverage, transmission speed is slow, the theoretical value transfer rate is highest for 153. Basic only 6 KBPS, in be used actually reach 60 ~ 80 KBPS. Because the bottom request 512 KBPS can smooth video image transmission, the speed is far can not meet the requirements of video. So in wireless monitoring project, there are very few manufacturers to choose.

2, 3 g wireless monitoring is to use mobile ( TD - SCDMA) , telecommunications, CDMA2000EVDO) , China unicom ( WCDMA) Access operators 3 g technology, since last year, the operators to promote, has quite a few monitor manufacturers for the development of related products. And 3 g the prominent advantages of high-speed download ability, ideal value can reach 3 KBPS ~ 20 MBPS transmission rate.

at present as the 4 g network popularizing, 4 g wireless monitoring also catching up in the market, its fluency can be normal network bandwidth, video image smooth transmission.

WIFI wireless monitoring of type

strictly, WIFI wireless monitoring type is divided into two ways; Is a kind of analog wireless monitoring; The other is a digital wireless monitoring.

1, the simulation of wireless monitoring is to video signal modulation in 2 directly. 4 g or 1 g wireless channels, through the antenna to launch out, the monitoring center through the antenna wireless signal, again through the wireless receiver demodulation of the original video signal, this way of monitoring without compression loss, almost no delay, so you can ensure the quality of video, but it is only suitable for point-to-point close ( 1 km) The scale of single path transmission for deployment.

in addition because there is no modulation calibration process, poor anti-jamming, frequency, less so in the case of wireless signal environment complex itself will produce very big interference, image confusion, loss, and so on and so forth. So in the case of have multiple images to transmission, transmission does not recommend using this way.

2, digital wireless monitoring is the first video signal compression coding, modulation (via digital wireless channel 2. 3G/2. 4G/5. 8 g, etc. ) Antenna, reuse. The receiving end, on the other hand, by the antenna signal, then the wireless solution to the video compression, the final reduction for analog video signal transmission, which is widely used at present domestic market. Digital microwave scale is big, at least dozens of channels available communications capacity, and construct the relatively easy, high communication efficiency, the use of flexible.

digital wireless analog wireless not than the advantages, such as large area ( 5 - 30 square kilometers) , monitoring point ( 5 - 500 points) Need to add the condition of the relay, is more complex and interference sources for the LP5800 - WBSWIFI base station combined with the base station for the center front CPE equipment way transmission price is very high. Digital wireless capacity big, strong anti-interference ability, the secrecy good, the same transmission power transmission distance is farther, less affected by terrain or obstacles, rich interface, extend ability, etc.

of course, different wireless transmission technology has its respective applicable place. Such as, oil field, the border in the factory, forest, etc. , with 3 g4g network in all aspects of performance, decreased the costs of traffic, the maturity of the network environment, and the universal demand, wide range of wireless monitoring may force 3 g4g further use of the wireless monitoring.