1. 3G wireless monitoring equipment
3G wireless monitoring is a simple and easy-to-use small remote wireless monitoring system. It adopts Zui new 3G communication technology to design and implement a 3G mobile video monitoring device with simple installation, convenient operation and high cost performance for the monitoring application needs of users in families, small enterprises or specific industries. The advantages of 3G wireless monitoring equipment are:
The initial investment is very low, and the installation and use are also very convenient. As long as there is 3G signal coverage, the equipment can be turned on to transmit signals.
The disadvantage of 3G wireless monitoring equipment is that the later cost is relatively large, which is not suitable for long-term 24-hour monitoring. At present, the image transmission of this transmission signal is still not smooth, and the transmission image quality is not high enough, which can not meet the requirements of HD transmission at all.
2. 4G wireless video transmission equipment
4G is the abbreviation of the fourth generation mobile communication technology. China Mobile 4G adopts TD-LTE in 4glte standard.
The theoretical peak transmission rate of TD-LTE demonstration network can reach 100Mbps downlink and 50Mbps uplink. TD-LTE is a 4G network standard led by China. Its technology is mature and has the conditions for large-scale promotion. At present, it has been officially commercial.
4G wireless video transmission equipment is a communication technology formed after 3G wireless monitoring equipment. It integrates 3G and WLAN, and can quickly transmit data, high quality, audio, video and images.
The advantages of 4G wireless video transmission equipment are: 4G wireless video transmission rate is high, it can transmit video images with high quality, and it can provide a more stable and adjusted wireless mobile network. The initial investment is very low, and the installation and use are also very convenient. As long as there is 4G signal coverage, the equipment can be turned on to transmit signals.
The disadvantage of 4G wireless monitoring equipment is that the later communication cost is relatively large, which is not suitable for long-term 24-hour monitoring.
3. Microwave wireless monitoring equipment
Microwave wireless monitoring equipment is currently the main Liu product on the market. The wireless monitoring equipment is the perfect combination of microwave transmission technology and wireless monitoring technology. Microwave wireless monitoring can be divided into analog microwave and digital microwave.
Analog microwave transmission is to directly modulate the video signal on the microwave channel (microwave transmitter) and transmit it through the antenna. The monitoring center receives the microwave signal through the antenna, and then demodulates the original video signal through the microwave receiver. This monitoring method has very clear images, no delay, no compression loss, low cost, simple construction, installation and commissioning, and is suitable for use when there are not many monitoring points and there are not many relays.
Digital microwave transmission, i.e. wireless bridge, is to encode and compress the video, then modulate it through the digital microwave channel, and then transmit it through the antenna. On the contrary, the antenna receives the signal, microwave despreading, video decompression, shrimp soldiers restore the analog video signal, or install the corresponding decoding software through the computer after microwave despreading, and decompress the video with the computer software, Moreover, the computer also supports video recording, playback, management, PTZ control, alarm control and other functions; This kind of monitoring method is more complex, there are many situations that need to add relays, and the monitoring points are relatively centralized. It can centrally transmit multi-channel video, and its anti-interference ability is better than that of simulation. It is suitable for the situation that there are more monitoring points and more relays.
Advantages of microwave wireless monitoring equipment: low investment cost, long transmission distance, very good anti-interference, clear and smooth transmission image, suitable for outdoor transmission in various harsh environments. Disadvantages of microwave wireless monitoring equipment: high environmental requirements, signal transmission must be carried out in an open environment, and the diffraction ability is very poor.
4. WiFi wireless monitoring equipment
The official name of WiFi (wireless compatibility certification) is “IEEE802.11b”. Like Bluetooth, it belongs to the short-range wireless technology used in offices and homes. Although this technology is worse than Bluetooth technology in terms of data security, it is slightly better in terms of radio wave coverage.
WiFi coverage can reach about 300 feet (about 90 meters). It goes without saying that the office can also be used in a smaller whole building.
WiFi frequency band is a free frequency band without any telecom operation license all over the world. Therefore, WLAN wireless equipment provides a wireless air interface that can be used all over the world with extremely low cost and high data bandwidth.
Advantages of WiFi wireless equipment: the investment cost is very low, the installation and use are very convenient, and the network can be built without professionals.
Disadvantages of WiFi wireless monitoring equipment: the transmission distance is short, so it can only transmit signals indoors in a short distance, and the diffraction ability is also very poor. Try to avoid obstructions during signal transmission.