Source: Beijing Daily
Original title: The world‘s largest city-level private network is connected to the world‘s largest city-level private network to escort the Winter Paralympics
From the holding of various events to the command and dispatch of transportation, security, and epidemic prevention, remote real-time collaboration that responds to all calls and pushes the button is always online… According to the Municipal Bureau of Economy and Information Technology, following the successful guarantee of the Beijing Winter Olympics, a piece of The world‘s largest city-level private network continued to show its capabilities to escort the hosting of the Beijing Winter Paralympics in an all-round way.
millisecond response
Overcame the mountains and endured the low temperature
The ice-like snow track on Mount Haituo has a drop of more than 900 meters. The terrain is complex and the ground rescue is difficult. It requires the close cooperation of the track emergency medical team, helicopter long-rope rescue, and ground-air dedicated network rescue command system.
In an emergency, the headquarters first issued instructions to the rescue helicopter through the ground-to-air base station; the helicopter quickly arrived within 5 minutes over the mountains and mountains, and hovered over the accident site; the rescue doctor informed the helicopter of the injury status of the injured through the radio. Scientific and precise rescue is carried out by helicopter sling without secondary injury caused by external force. This series of cooperation and cooperation is inseparable from timely and accurate communication transmission.
In 2003, in order to guarantee the Beijing 2008 Olympic Games and other major events, Beijing started the construction of an 800MHz narrowband digital trunking private network (referred to as 800M private network). Digital trunking private network is a kind of dedicated wireless communication network, which has the intuitive characteristics of “one-call response” and “key-press-communication” in the way of use.
“At an event like the Olympics, the number of people is often in the tens of thousands. If you rely on the communication network for making phone calls and sending messages, you are likely to encounter ‘congestion’ and affect the efficiency of information transmission.” Municipal Bureau of Economy and Information Technology Information Infrastructure Liu Xia, director of the division, said that the 800M private network can properly deal with network congestion and security incidents, ensuring that key communications are reliably guaranteed. Although not well-known to the public, it covers almost every corner of the city, guarding the city’s order and safety bottom line all the time.
The dispatching command of the arena “every second counts”. The Beijing 800M private network optimized the call time to within 174 milliseconds, with almost no delay. “The doctor next to the track has a push button call. We can hear it from a few kilometers away, and the voice is clear and free from any interference,” said Wang Li, medical manager of the National Alpine Ski Center.
The handheld terminal equipment equipped with the private network can also cope with the low temperature test calmly. The working time can reach 4 hours in the extreme low temperature environment of minus 30 ℃, and some models can work continuously for 12 hours, successfully solving the world-class low temperature problem in the field of mobile communication.
Autonomous and controllable
The real-time picture makes the scheduler immersive
The opening ceremony of the Beijing Winter Paralympics once again amazes the world. During the intense behind-the-scenes work, relevant personnel communicated and collaborated through walkie-talkies in real time, making the opening ceremony flawless.
In the Beijing Olympic Games 14 years ago, the 800M private network successfully completed the communication guarantee; 14 years later, Beijing added a higher-level autonomous and controllable private network with broadband transmission function.
After the successful bid for the Beijing 2022 Winter Olympics, Beijing made a solemn commitment to the International Olympic Committee to build a broadband digital trunking private network to meet the organizational needs of the Winter Olympics. Beginning in 2019, Beijing has fully launched the upgrade and transformation of base stations and core equipment of the entire 1.4G private network. At present, this private network has achieved continuous coverage of venues, related service facilities and important roads in the six districts of the city, the main suburban districts, the Beijing and Yanqing divisions of the Winter Olympics.
This Winter Olympics and Winter Paralympics is the first time that the 1.4G private network independently undertakes the task of the first-level command network in major international events, and participates in testing competitions, technical drills, torch relays, opening and closing ceremonies and the guarantee of all events. The real realization of “visible on site, reachable by command”. “Especially during the torch relay, the real-time picture can be seen on the command platform. In case of emergencies, it can be dispatched and resolved quickly.” Liu Xia said.
make history
Interconnection of the three major regions across the network
The Beijing Winter Olympics and Winter Paralympics are held across two cities and three major areas. Some arenas are in the plains, and some are in the mountains. Whether the communication and command and dispatch between the three places can be reached in a timely manner will test the technical team.
The trunking communication of the Beijing Division and Yanqing Division of the Winter Olympics and the Winter Paralympic Games is interconnected and jointly guaranteed by the Beijing 800M private network and the 1.4G private network. Among them, the 800M private network is used for the internal command and dispatch of each venue, and the Beijing 1.4G private network is used for the unified command and dispatch between the main operation center and the venues in the Beijing competition area and Yanqing competition area. The 1.4G private network is interconnected with the 350M private network in the Zhangjiakou competition area, which satisfies the unified command and dispatch between the main operation center and the venues in the Zhangjiakou competition area, and the unified competition organization between the Yunding Ski Park and the Shougang Ski Jumping Platform.
“We fully integrate the existing digital cluster private network infrastructure and support forces in Beijing and Hebei Province to achieve cross-network and cross-regional interconnection, and build a seamless network between the Winter Olympics Organizing Committee headquarters and the Beijing, Yanqing and Zhangjiakou competition areas. It is the first time in the world that a large-scale broadband and narrowband integrated trunking communication system has been put into practical application, and it is also the first time in the history of the Olympic Games that the interconnection and interoperability of cross-network, cross-region, and wide-narrow integration have been realized. .
After two “big exams” in the Winter Olympics and the Winter Paralympic Games, the capital city’s all-weather emergency response, full real-time interactive dispatch, all-round on-site perception, and all-field information collection has become more stable and mature in the command and dispatch communication support system, which will also be implemented in the future. More important events to serve the city and the people. (Cao Zheng)