A brief analysis of 3G/4G technology applied to anti-theft alarm system

　　The burglar alarm system is the most important part of the entire security system. When there is an illegal intrusion or an emergency such as a gas leak, fire, or an elderly person's acute illness, the various detectors installed in the room will detect the alarm, the burglar alarm will generate an alarm, and the alarm center will receive the alarm information within seconds, and quickly dispatch security or ambulance personnel to the scene to deal with it.

　　As the most important part of the security system, the anti-theft alarm system uses fully automatic anti-theft electronic equipment. In unattended places, it uses infrared detection technology and various magnetic switches to judge illegal intrusions, and sensors to detect gas leaks. It uses speakers or warning lights to alarm on the spot, and transmits the alarm to the alarm center or the owner through the telephone network. At the same time, when someone is in an emergency indoors, emergency information can be sent to the network center and the owner through various wired or wireless emergency buttons or keyboards.

　　Common anti-theft alarm systems include detectors, alarm controllers, sirens, warning lights, and alarm receiving centers.

　　With the rapid development of the Internet, mobile alarm terminals such as smartphones and tablet computers have also emerged, which can be used in conjunction with APP applications to realize mobile alarm management.

　　2. Traditional burglar alarm system networking method

　　The networking components of traditional burglar alarm hosts and alarm centers are usually divided into: wired telephone network PSTN, wireless mobile dial-up communication network GSM, wired IP network communication method and wireless data communication network GPRS.

　　Let's first understand some of the advantages and disadvantages of traditional communication methods:

　　1. Advantages of PSTN: The main advantages of telephone line reporting are wide coverage and large user groups. Disadvantages: There are some problems with the traditional telephone alarm networking system. The alarm communication speed is slow, and it takes dozens of seconds. When reporting concurrently, the line is easily blocked, which has a great impact on the timeliness of the alarm. The communication link cannot be well detected. When the telephone line is broken or damaged, it cannot be discovered in time, making it impossible to report the alarm in time. Compared with network communication methods, the cost of telephone alarm is relatively high. Through PSTN, most traditional anti-theft alarm systems cannot or are not convenient to deploy and withdraw the front-end equipment, and cannot query the working status of the front-end equipment in real time, which is not easy for the central system to manage uniformly. And with the transformation of traditional telephone lines, many problems such as unstable transmission have been brought about.

　　2. Advantages of wireless GSM dial-up: Compared with PSTN, the networking form is not restricted by the physical connection form; Disadvantages: High dial-up reporting delay, poor concurrency, inability to reverse query device status, affected by base station signal coverage, and relatively high cost in previous applications.

　　3. Advantages of wireless GPRS network: It solves all the problems encountered by traditional telephone dial-up methods (PSTN and GSM). The low network communication cost allows 24-hour heartbeat detection of line status, and performs back control (disarming, alarm elimination, bypass, etc.), query of host status and other operations, which is easy for TCP/IP network management on a large scale. It is easy to reverse control (disarming, alarm elimination, bypass, etc.) and status query; for the transmission of small data information such as alarms, it can meet the needs of a large number of alarm reports without blocking. It is easy for TCP/IP network management on a large scale. Disadvantages: However, due to the influence of signal base station coverage, the transmission rate of wireless communication network is often slow. It is still possible to transmit only some alarms, but it is impossible to transmit video streams at all.

　　4. Advantages of wired IP network: It combines the advantages of PSTN/GSM dial-up network and wireless GPRS communication methods, and has the advantages of fast transmission rate, strong timeliness, 24-hour line heartbeat detection, data encryption protection, etc. It can not only transmit alarm information, equipment status, etc., but also transmit pictures, video streams and other information. When reporting the alarm, upload some pictures or videos of the on-site event process, and realize the picture or video review of the alarm on the mobile terminal or the alarm receiving terminal, so as to judge the authenticity of the on-site alarm at the first time and improve the efficiency of police handling. Disadvantages: Limited by wired network deployment and site. In comparison, with the development of the Internet and the popularization of the network, wired networks have a high regional coverage rate. However, some remote areas or sites that need to be deployed quickly. It is also difficult for wired networks to cover.

　　In general, the four communication methods of wired IP network, PSTN, GSM, and GPRS have their own strengths. So, is there a better networking communication method that can be applied to burglar alarms?

　　3. Application of 3G/4G communication technology

　　In response to the question in the previous section, is there a better way to network and communicate? The answer is yes. With the advent of the Internet era, mobile operators have built many base stations, and the 3G/4G signal coverage is high. It not only has the advantages of wired IP networks, but also is easy and fast to deploy. With mobile smart terminal devices, it can realize truly system-level convenient mobile services, with low networking costs and easy and fast layout of network management.

　　With the innovation and evolution of mobile Internet technology, 3G/4G mobile communication technology is widely used, which can quickly and high-quality transmit data, such as audio, video and images. It can transmit at a speed of several Mbps, which is 25 times faster than the current home broadband ADSL (4 megabytes), and can meet the requirements of almost all users for wireless services. In addition, 3G/4G can be deployed in places where DSL and cable TV modems are not covered, and then expanded to the entire area. Obviously, 4G has incomparable advantages.

　　The following figure compares the four communication methods from two perspectives: transmission rate and network deployment speed of anti-theft alarm equipment.

　　3G/4G has incomparable advantages. It has a high transmission rate and is suitable for transmitting pictures, video streams, etc. It is more convenient and faster to connect devices with 3G/4G communication methods. I believe it will have very good application prospects in the future.

　　4. Application scenarios of 3G/4G anti-theft alarm system

　　Nowadays, 3G/4G is widely used because of its incomparable advantages. Its application in anti-theft alarm systems can greatly enhance the communication and networking of traditional alarm equipment, adding unlimited possibilities.

　　The new 3G/4G communication method can solve the problems of traditional systems. It can bring more convenient mobile services. With the improvement of people's quality of life, the appearance of the anti-theft alarm system will become more integrated, friendly, compact and multifunctional. With the wireless IoT detection sensor detector technology, wifi technology and 3G/4G network communication, the front-end system deployment and system use can be realized more quickly. It is more suitable for the owner's intelligent mobile management and alarm service network alarm management needs.

　　3G/4G communication methods have very good application prospects in the future.

　　1. Family

　　Safety is the most important basic factor in life. Break-ins, gas/fuel gas leaks, burst water pipes, etc. all affect our personal and property safety. What's more serious is that when the elderly are left alone and suddenly develop a serious disease, they are unable to ask for help. Avoiding such incidents has become a top priority for safe living.

　　In the home, some sensors can be deployed to deploy wireless door (window) magnetics, passive infrared, etc. to prevent intrusion; wireless smoke detectors and gas detectors can be deployed to prevent fire and gas leaks; emergency assistance devices can be worn by the elderly or children to send out distress signals when emergencies occur, and some wireless network cameras can be deployed to ensure life safety. Whether it is personal mobile self-service management, or hosted in the community, or hosted in a local service alarm center, the alarm can be quickly transmitted to each terminal, and the recipient can quickly learn about the real-time situation at home. Such a wireless protection system is independently deployed and exists independently, serving you and your family attentively.

　　2. Commercial streets, complexes, chain stores, and operation service points

　　In street shops, chain stores and commercial complexes, shop owners often change frequently, it is inconvenient to lay cables after renovation, and wired sensor deployment affects the appearance. Each shop needs to deploy some video surveillance for daily monitoring. Wired network communication does not cover all shops. However, wireless 3G/4G basically covers all shops. Then wireless detectors, wifi cameras, and 3G/4G video alarm hosts are used to quickly deploy front-end systems. One device manages alarms and video access, and quickly connects to service centers and personal terminals.

　　The front-end equipment is easy to maintain and migrate, and is very suitable for operation and maintenance service companies to provide services for commercial stores, complexes, chain stores, operation service points and other scenarios.

　　3. Remote base stations

　　Base stations in remote mountains are often invaded and stolen by thieves. The wireless base station has been covered, but the backbone network has not been laid, so it is impossible to connect to the Internet through a wired network. Then 3G/4G alarms have inherent advantages. They can meet such needs, and can also provide regular inspection services for front-end equipment through 3G/4G. When an alarm occurs, the front-end pictures/videos can be transmitted to the remote center through 3G/4G for video alarm review and alarm process backup.

　　3G/4G alarms are very suitable for remote base station operation and maintenance and equipment in areas covered by base station signals.

　　4. Special fields

　　In oil fields, highways, railways, construction sites and other sites, it is impossible or difficult to deploy wired networks, but there is a need for intrusion prevention and video surveillance on site. In this case, we can select 3G/4G video alarm host equipment to meet the needs of the site, quickly deploy the anti-theft system, quickly monitor and prevent, and realize intelligent mobile management.

　　V. Conclusion

　　The application of 3G/4G alarms eliminates the need to deploy (wired) networks for front-end system deployment, and can be quickly completed and put into use in personal self-service and service-hosted alarm centers.

　　With the reduction of mobile communication fees and low traffic costs, the new round of network speed-up and fee reduction has made costs no longer a problem. The construction and coverage of more base stations have been able to meet the application environment of 3G/4G alarms. In the future, 3G/4G alarms will be widely used in various industries.