What are the similarities and differences between 3G wireless routers and WIFI wireless routers in monitoring applications

With the gradual development of the monitoring industry, wireless monitoring eliminates network wiring and reduces construction difficulty; Reduce line costs; The installation position is more flexible. Widely used in video surveillance fields such as traffic light control and photo transmission, bus monitoring, highway monitoring, environmental detection, vehicle mobility, fire exits, and comprehensive alarm points. Plays a crucial role in today's life. So what are the similarities and differences between 3G wireless routers and WIFI wireless routers in monitoring applications? Wifi 5 Outdoor Wireless Ap

3G wireless monitoring

Strictly speaking, there are two modes: 2G and 3G; One is the previous 2G model test, and the other is the latest version of 3G model test.

1. The 2G wireless monitoring transmission methods mainly include CDMA and GSM modes. These two modes have low hardware costs, large coverage, and slow transmission speeds. The theoretical maximum transmission rate is 153.6Kbps, which is basically only 60-80Kbps in practical use. Because video images require a minimum of 512Kbps for smooth transmission, this speed is far from meeting the video requirements. Therefore, in wireless monitoring projects, few manufacturers choose to use it. Wifi 6 Outdoor Wireless Ap

2. 3G wireless monitoring adopts the 3G technology access method of mobile (TD-SCDMA), telecommunications (CDMA2000EVDO), and China Unicom (WCDMA) operators. Since 2009, after strong promotion by various operators, many monitoring manufacturers have developed related products in this area. The outstanding advantage of 3G is its high-speed download capability, with an ideal transmission rate of 3Kbps to 20Mbps. Wireless Bridge

At present, with the promotion and popularization of 4G networks, 4G wireless monitoring has caught up in the market, and its smoothness can be as smooth as the normal bandwidth network, with smooth transmission of video images.

Strictly speaking, WIFI wireless monitoring can be divided into two methods; One is to simulate wireless monitoring; Another type is digital wireless monitoring.

1. Analog wireless monitoring is the process of directly modulating video signals on a 2.4G or 1G wireless channel, transmitting them through an antenna. The monitoring center receives the wireless signal through the antenna, and then demodulates the original video signal through a wireless receiver. This monitoring method has no compression loss and almost no delay, thus ensuring video quality. However, it is only suitable for point-to-point close range (within 1000M) single channel transmission, Not suitable for scale deployment.

In addition, due to the lack of modulation calibration process, poor anti-interference performance, and few frequency points, it can generate significant interference in complex wireless signal environments, resulting in image confusion, loss, and other situations. Therefore, when there are multiple images to be transmitted, it is not recommended to use this method for transmission.

2. Digital wireless monitoring is the process of encoding and compressing video signals, modulating them through digital wireless channels (2.3G/2.4G/5.8G, etc.), and then transmitting them using antennas. On the other hand, the receiving end receives the signal through an antenna, followed by wireless despreading and video decompression, and finally restored to an analog video signal for transmission. This method is also commonly used in the domestic market at present. Digital microwave has great scalability, communication capacity can be used for at least dozens of channels, and construction is relatively easy, communication efficiency is high, and application is flexible.

Digital wireless has incomparable advantages compared to analog wireless, such as large area (5-30 square kilometers), multiple monitoring points (5-500 points) requiring relay, complex situations, and multiple interference sources. When using the LP5800-WBSWIFI base station as the center and cooperating with the front-end CPE equipment of the base station, the transmission cost performance is very high. Digital wireless has large capacity, strong anti-interference ability, and good confidentiality. The same transmission power has a longer transmission distance, is less affected by terrain or obstacles, has rich interfaces, and strong scalability.

Of course, different wireless transmission technologies have their own applicable places. For example, in factories, oil fields, border defense, forests, etc., with the improvement of various aspects of 3G4G network performance, the decrease in traffic costs, the maturity of the network environment, and the widespread demand for large-scale wireless monitoring, it will also promote the further use of 3G4G wireless monitoring.