What Is a Cluster Development?

Trunked communication system is a kind of mobile communication system for group dispatching and command communication. It is mainly used in the field of professional mobile communication. The available channels of this system can be shared by all users of the system, and have the function of automatic channel selection. It is a multi-purpose, high-performance wireless scheduling communication system that shares resources, shares costs, shares channel equipment and services.

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The cluster communication system is a kind of communication for group dispatch command.

The biggest feature of trunked communication is the use of voice communication.

China began to introduce analog cluster systems in 1989 and put them into use in 1990. along with

Cluster first impetus

China Satcom and China Tietong both promote the digital trunking business as a development focus, but both have a slight focus. Taking advantage of the advantages of "satellite communications and the integration of heaven and earth", China Satellite Communications has used satellite communications and ground cluster communications to construct an emergency communications system with higher security performance, and has made breakthroughs in the construction of urban emergency linkage.

According to staff of China Satcom, China Satcom's urban emergency linkage construction in Weifang, Shandong has become a "model project" and has been widely promoted. There was also news that China Satcom won the bid for the construction of Qingdao Cluster Communications. China Satcom digital trunking communication network has covered Beijing, Shanghai, Tianjin, Jinan, Nanjing, Qingdao, and Weifang, and has achieved applications in government sectors, ports, transportation, energy, logistics and other fields. Major conferences and events such as the Tenth National Games, the Shanghai APEC Conference, the Shanghai F1 Competition, the Tianjin Asian-European Finance Ministers Conference, and the Qingdao International Olympic Sailing Competition provide efficient and high-quality communications guarantee.

In terms of Olympic communications, Beijing Zhengtong, a subsidiary of China Satellite Communications, is responsible for the construction of the Olympic digital cluster in the Beijing area. In 2007, Beijing Zhengtong successfully provided digital trunk dispatch communication support services for "two sessions", "city party congress", "world taekwondo championship" and other activities. While ensuring the successful completion of the third-phase expansion project of the digital trunking communication network, Beijing Zhengtong is undergoing rigorous inspections of 23 Olympic test competitions for digital trunking communication support capabilities and service levels.

China Railcom, with its deep experience in railway cluster dispatching, strives to open up new horizons in the cluster communications market. After China Railcom launched the "YiXunTong" digital trunking business, it has established commercial test networks in Shenyang, Changchun and Chongqing. The digital trunking business of China Railcom has been widely used in the above three cities.

In addition, China Tietong also undertook the communication guarantee of Qinhuangdao International Women's Football Invitational Tournament, which is also part of the Olympic test match. Tietong's "One Express" digital trunking business will also be strictly inspected.

Cluster domestic and foreign technical wrestling

Digital trunking group call, group call, broadcast call, emergency call, forced release, and different priority levels are the basis of its technical application. Therefore, high system security, reliability, and extremely short call setup time, etc. Has become the focus of cluster product competition. The competition in the domestic market is mainly reflected in the competition between foreign technology and domestic technology.

At the China Satcom booth, Zhao Zheng, a staff member of Beijing Zhengtong, told reporters that the cluster technology used in the Beijing Olympic Games communications is all TETRA. After years of international application, TETRA has the guarantee of stability, security and fast response. , Has been recognized by many parties. For this reason, TETRA has become the only digital trunking technology used in Beijing.

China Satcom and China Tietong also cooperate with ZTE to promote the development of China's digital trunked communication technology GOTA. China Railcom has adopted a large number of GOTA systems, and the number of digital trunk commercial users has reached more than 30,000. Hou Weigui, Chairman of ZTE Corporation, said that ZTE will increase its efforts in the development of GOTA digital clusters, make every effort to solve the problems of the GOTA system, and fully support China Satellite Communications to provide better digital clusters for government departments, industry users and the Olympic Games. Communication service.

Improved cluster performance

According to the introduction, the domestic GOTA digital trunking technology system has some network, system, and terminal problems in the trial commercial process of Tianjin, Jinan, Nanjing and other cities for more than three years. However, according to the staff of ZTE booth, detailed analysis ask

GOTA digital trunking system

After the cause of the problem, ZTE formulated a solution that has achieved the expected targets. The GOTA digital trunking system has achieved a response time of the entire network of less than 900ms. At the same time, the stability and security of GOTA's entire network operation have been improved.

In addition, in order to cooperate with operators to develop various industry markets, ZTE's GOTA system has further developed API interfaces, customized client applications, and provided general dispatching platform software, while helping various users to develop dispatching integration systems with unique applications.

Cluster to be positioned

In addition to private network trunking communications, the reporter also found that some manufacturers exhibited digital trunking communication systems based on public networks. For example, Jinpeng exhibited digital trunking communication products based on TD-SCDMA. According to reports, Jinpeng's cdma2000-based cluster communication system has also been running in Guangzhou for a long time.

However, some industry experts said that public network-based cluster communication has yet to be tested in terms of actual commercial use. Although the public network cluster communication has the characteristics of low network construction costs and cheap terminal prices, it is not the development direction of the entire cluster communication industry. Experts said that its market positioning needs to be further clarified.