The advantages of wireless monitoring and three major wireless surveillance competitions
The wireless network video monitoring system is based on the original Ethernet monitoring system and performs data transmission wirelessly, which eliminates the wiring cost of the wired network and enhances the flexibility and expandability of the monitoring.
The advantages of wireless surveillance <br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br> However, in the process of realizing high-definition, digitalization, and intelligence, video wireless transmission plays a role as a bridge, and the convenience and flexibility of wireless transmission link the three to realize the application in the security industry.
1. The low overall cost requires only a one-time investment and no need to dig trenches. It is particularly suitable for outdoor and remote installations. In many cases, users are often limited by the geographical environment and work content, such as mountainous regions. Special geographical environments such as ports, ports, and open areas have brought great inconvenience to the wired network and wired transmission wiring works. The construction period for using the cable will be very long, or even impossible at all. At this time, the use of wireless monitoring can get rid of the shackles of cables, and has the advantages of short installation cycle, easy maintenance, strong capacity expansion, and rapid cost recovery.
2. Flexible networking, good scalability, plug and play, administrators can quickly add new wireless monitoring points to existing networks, eliminating the need to build networks for new transmissions, add equipment, and easily implement remote wireless monitoring. .
3, low maintenance costs, wireless monitoring maintenance by the network provider maintenance, front-end equipment is plug and play, maintenance-free system.
The wireless transmission technology has the advantages of flexible networking, rapid opening, and low maintenance costs. Therefore, there is a huge market for its application. However, with the rapid development of wireless transmission technology, its security issues have received more and more attention. Although the wireless transmission equipment on the security market currently uses various mechanisms to enhance its security, many in the industry have found that there are various security holes in the confidentiality agreement. For example, he cannot guarantee the confidentiality and integrity of data. Authenticated to the accessing user.
Three wireless transmission technology Competition <br> <br> currently optional wireless transmission technologies include 3G, WiFi, GPRS, underneath the differences will have to introduce these three technologies:
3G: For the current three 3G technologies, China Mobile's TD-SCDMA has a relatively small bandwidth and is rarely transmitted using this technology. Unicom's WCDMA and Telecom's CDMA-2000 (EVDO) are generally used as the main 3G standard for wireless transmission of public transportation;
WiFi: According to the speed and technology of the new and old can be divided into 802.11a, 802.11b, 802.11g, 802.11n;
GPRS: Different from the continuous channel transmission method in the past, it is transmitted in packets and the transmission rate can be increased to 56-114Kbps.
These three technologies are currently used wireless transmission technologies. Among them, 3G networks are the most common and the main carrier for real-time transmission. Through the country's strong support in recent years, China’s 3G network coverage has become more and more widespread, and in large and medium-sized cities and The surrounding areas are all built with a theoretical bandwidth of more than 2Mbps, which can meet the real-time transmission needs of public transport standard-definition video streams. WiFi network bandwidth is much larger than 3G bandwidth, but its construction is narrow. Even in big cities such as Shanghai, it has not been able to achieve full coverage of its network, which is not conducive to the real-time transmission and application of bus monitoring data; to compensate for the lack of 3G wireless bandwidth, bus The company will usually deploy a WiFi network on site, and when the bus enters the venue, it will automatically switch to a high-bandwidth WiFi network for large data traffic.
The bandwidth of GPRS wireless transmission technology is the lowest of these three. In the case of a good network, it is only a few tens to more than 100 Kbps, which is not conducive to the real-time transmission of video streams. It is generally used for frame transmission or alarm information distribution; the network is not good. In this case, the onboard server will automatically select the GPRS network to transmit the alarm information. In addition, there are 2 generations of network GSM transmission technology. Since this technology has a very small bandwidth, generally only a few Kbps, but its network coverage is very wide, it is still the current mainstream technology for wireless transmission, and can be used in areas where remote 3G and other networks cannot cover. The technology transmits intermittently or uninterruptedly the driving state of the vehicle.
The advantages of wireless surveillance <br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br> However, in the process of realizing high-definition, digitalization, and intelligence, video wireless transmission plays a role as a bridge, and the convenience and flexibility of wireless transmission link the three to realize the application in the security industry.
1. The low overall cost requires only a one-time investment and no need to dig trenches. It is particularly suitable for outdoor and remote installations. In many cases, users are often limited by the geographical environment and work content, such as mountainous regions. Special geographical environments such as ports, ports, and open areas have brought great inconvenience to the wired network and wired transmission wiring works. The construction period for using the cable will be very long, or even impossible at all. At this time, the use of wireless monitoring can get rid of the shackles of cables, and has the advantages of short installation cycle, easy maintenance, strong capacity expansion, and rapid cost recovery.
2. Flexible networking, good scalability, plug and play, administrators can quickly add new wireless monitoring points to existing networks, eliminating the need to build networks for new transmissions, add equipment, and easily implement remote wireless monitoring. .
3, low maintenance costs, wireless monitoring maintenance by the network provider maintenance, front-end equipment is plug and play, maintenance-free system.
The wireless transmission technology has the advantages of flexible networking, rapid opening, and low maintenance costs. Therefore, there is a huge market for its application. However, with the rapid development of wireless transmission technology, its security issues have received more and more attention. Although the wireless transmission equipment on the security market currently uses various mechanisms to enhance its security, many in the industry have found that there are various security holes in the confidentiality agreement. For example, he cannot guarantee the confidentiality and integrity of data. Authenticated to the accessing user.
Three wireless transmission technology Competition <br> <br> currently optional wireless transmission technologies include 3G, WiFi, GPRS, underneath the differences will have to introduce these three technologies:
3G: For the current three 3G technologies, China Mobile's TD-SCDMA has a relatively small bandwidth and is rarely transmitted using this technology. Unicom's WCDMA and Telecom's CDMA-2000 (EVDO) are generally used as the main 3G standard for wireless transmission of public transportation;
WiFi: According to the speed and technology of the new and old can be divided into 802.11a, 802.11b, 802.11g, 802.11n;
GPRS: Different from the continuous channel transmission method in the past, it is transmitted in packets and the transmission rate can be increased to 56-114Kbps.
These three technologies are currently used wireless transmission technologies. Among them, 3G networks are the most common and the main carrier for real-time transmission. Through the country's strong support in recent years, China’s 3G network coverage has become more and more widespread, and in large and medium-sized cities and The surrounding areas are all built with a theoretical bandwidth of more than 2Mbps, which can meet the real-time transmission needs of public transport standard-definition video streams. WiFi network bandwidth is much larger than 3G bandwidth, but its construction is narrow. Even in big cities such as Shanghai, it has not been able to achieve full coverage of its network, which is not conducive to the real-time transmission and application of bus monitoring data; to compensate for the lack of 3G wireless bandwidth, bus The company will usually deploy a WiFi network on site, and when the bus enters the venue, it will automatically switch to a high-bandwidth WiFi network for large data traffic.
The bandwidth of GPRS wireless transmission technology is the lowest of these three. In the case of a good network, it is only a few tens to more than 100 Kbps, which is not conducive to the real-time transmission of video streams. It is generally used for frame transmission or alarm information distribution; the network is not good. In this case, the onboard server will automatically select the GPRS network to transmit the alarm information. In addition, there are 2 generations of network GSM transmission technology. Since this technology has a very small bandwidth, generally only a few Kbps, but its network coverage is very wide, it is still the current mainstream technology for wireless transmission, and can be used in areas where remote 3G and other networks cannot cover. The technology transmits intermittently or uninterruptedly the driving state of the vehicle.
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