Introduction: In the professional wireless communications technology to flourish, more in-depth technology today, the traditional narrow sense of "private network" understanding of the past; the application of digital radio, PDT, LTE, McWiLL, MiWAVE, PTT and other technology, ushered in the professional spring communications industry development; voice, data, images, video and other diversified technology has even demonstrated the private network market colorful new features; the face of the new environment, new technologies, new applications, new markets for new pattern, in the industrial chain enterprises should be how to adjust the structure of their own development, how to face the new competitive market environment, how to conduct effective technology integration, how the user needs to choose their own solutions, are currently facing the industry the big problem.
In order to promote the rapid development of professional communication, accelerate the formation of professional communications industry chain, with the strong support of the Ministry of Radio Authority, the Ministry of Science and Technology Information Bureau under the "enhanced exchange of atmosphere, experience digital China, promoting technological integration, to create applications "under the purpose, in order to meet and communicate with the application requirements to meet current industry diversified technology," the pattern of 2013 Shenzhen international professional wireless digital communications and information technologies Fair "will be held in Shenzhen convention and Exhibition Center grand; the fair includes digital radio digital trunking systems, wireless broadband communication access, intelligent security, data transmission and related dispatching, emergency support, high-end technology solutions and display applications, involving public security, energy, transport, urban residential, commercial and other dozens of different specific areas, reflecting the development trend of large professional wireless communication technology integration, will create a smart city, a harmonious society to create positive conditions.
The fair, professional wireless digital communications technology and application development forum is a major attraction, has aroused widespread concern digital radio and digital trunking system PDT Ministry of Public Security will focus for the majority of professional users, outstanding business and professional user groups from home and abroad will brought together a bound interpretation of a high-profile, high-level trade exchange conference.
After the adoption of a large number of enterprises and the exchange of this article, a careful analysis of the characteristics of the new technology industrial era, industrial development and enterprise restructuring, expressed some superficial view, please correct me.
1, the evolution of technology professional wireless communications industry
Information age, wireless communication technology in various fields has been fully applied, load and promote progress and social stability of the times. Professional wireless communication means in some industries, internal departments or units, in order to meet their organization and management of production safety, command and other needs of the construction of communication networks, as technology advances, the status and role of the private network is more prominent, timely effective communication of voice, data and image capture, video transmission, for the community, city, family harmony and stability play a key role, and public network communication complement each other.
In the past, the technical standards of private network communication to the introduction of foreign standards-based, the vast majority of domestic private network vendors do not grasp the core technology, is located in the low end of the industry chain, most professional communications just stop at the intercom, SSB, VHF radio and simulation cluster stage; small part of a private network using TETRA, IDEN narrowband digital trunking technology, but the market is basically monopolized by Motorola, EADS, Nokia, Siemens and other international giants.
Beginning in 2007, China's private network construction by strong government support, the development of private network into a rapid phase. Public safety, military and other law enforcement departments, as well as oil, electricity, rail transport, inland shipping, airports, ports and other key industries, fully aware of the special network of information technology transformation of the promotion of traditional industrial production change, industrial structure optimization, productivity and economic the importance of effective promotion, etc., resulting in a lot of special network building program, thereby forming a flourishing, multi-Bin colorful situation.
"Next-generation broadband wireless mobile communications network" national major projects for private network communication industry development, China has formed a clear strategic thinking. China's own broadband wireless access industry information technology industry target market is the private network. Broadband multimedia cluster system is the main direction of the broadband wireless access technology.
January 7, 2013, under the co-directed the Ministry of Radio Authority and the Ministry of Science and Technology Information Bureau in Beijing held a "public protection and relief broadband wireless communication (PPDR) Technology Forum inaugural meeting," Chinese Academy of Engineering Wu He Quan, the Ministry of Radio Xie Feibo managing director, deputy director of the Ministry of Science and technology information Bureau, Ma Xiaodong and other leaders to be congratulated and delivered a speech. The General Assembly on the promotion of broadband PPDR process, accelerate the construction of a private network industry chain of great significance.
2, broadband multi-media cluster system is more fusion application communication technologies
With a strong fixed-line, broadband, 3G and other network resources for communications infrastructure and take advantage of high-speed network bandwidth and strong ability to support multimedia services, mobile office, networking, e-commerce and other business communications systems, broadband multimedia is a cluster system . This system can provide a variety of information technology solutions for the majority of industrial customers to provide personal, efficient information services, can be anytime, anywhere, to enjoy the application of information technology to carry.
Specifically, set text, sound (including music), images, animations, video, and many other media in one, through the private network transmission, and then deal with a variety of media, which is characterized by diverse information media, integration, interactive and real-time. Development of multimedia need to have the following key technologies: (1) data compression and coding techniques. (2) media synchronization technology. (3) multimedia network technology. Visible, broadband multi-media cluster system is fairly comprehensive communication technology applications, it tends to set computer, networking, signal transmission, software radio, statistical theory, chip technology, construction technology and other high technology.
Public safety, energy, transportation, agriculture and other key sectors of the modern broadband multimedia cluster system needs urgent, market share is large enough, but the urgent need to establish broadband multimedia cluster system innovation chain and industrial chain. Major projects overall broadband multimedia cluster group call "research use" related to each unit closely together, the formation of industry alliances, big industry. Major special broadband wireless access overall group proposed broadband multimedia cluster system "two-step" strategy to promote:
The first step: McWiLL broadband multimedia trunking system with the current needs of the industry coincide, industry conditions are met, the standard is relatively mature, capable of industrialization in a shorter time, McWiLL equivalent cluster system 3G, based initiatives to McWiLL , in the "five" interim build broadband multimedia cluster complete industrial chain, to achieve large-scale commercial.
Step two: based on TD-LTE technology cluster system for the future, providing more than 100Mbps transfer rate, equivalent to the cluster system 4G, TD-LTE cluster initiative in the "Twelve Five" to achieve large-scale demonstration.
3, a new private network communication technology advances professional communication new technologies are emerging, the following is a relatively new communications standards, technologies and methods.
◆ LTE: As we all know, 2G, 3G has provided a good voice networks, LTE task is superimposed on a broadband access network data on the 2G / 3G network. This in reality is quite meaningful, it can increase the transmission rate, but also effectively reduce communication costs. Using OFDM and MIMO as the sole criterion for its wireless network evolution to achieve a spectrum of 20MHz to provide a downlink 100Mbit / s and uplink peak rate of 50Mbit / s of.
In 2007, under the leadership of the Chinese government, China Mobile launched the International Organization for Standardization in the TD-LTE international standards, becoming the only 3GPP TDD standard, TDD technology Chinese independent intellectual property rights really started to go international. January 2012, TD-LTE-Advanced standard submitted by China has become one of the communication standards of the ITU 4G.
TD-LTE's advantages, first TD-LTE spectral efficiency is relatively high, the current can reach 5-10bps / Hz, the second is to do a private network cluster applications, call delay is relatively short, is conducive to the use of TD-LTE technology to build the cluster private network. TD-LTE is currently in a number of private network has been applied, such as Beijing, Tianjin government network, Zhejiang Haiyan national grid test network. In the energy sector, such as oil, coal and so on TD-LTE also showed strong demand.
◆ McWiLL: Information multicarrier wireless local loop technology, Beijing Xinwei Telecom is the self-developed mobile broadband wireless access systems, is a leading international advanced level of broadband wireless access technology standards, the rate of single-carrier system / sector can up to 15Mbps. in December 2008, the Ministry of State Administration of radio issued a document without [2008] No. 332, McWiLL in line with the document on the 1800MHz band wireless access requirements.
In 2009, China Communications Standards Association (CCSA) completed the "1800MHz SCDMA broadband wireless access system air interface technology requirements" and a series of industry standards, McWiLL lay the foundation for an international standard. McWiLL system in 2010 was recognized as the ITU international standard for mobile broadband wireless access technology, TD-SCDMA is the second after another international telecommunications standards completely independent intellectual property rights, is currently the sole owner of the frequency authorization and establish a complete industrial chain broadband wireless access system.
◆ MiWAVE: This is Shanghai Han Technology Co., Verizon Wireless launched broadband wireless access products, based on broadband wireless multimedia (Broadband Wireless Multimedia, BWM) national standards compatible with TD-LTE standard framework uplink uses autonomous DFT- S-GMC multiple access technology to improve power amplifier efficiency and coverage, enhanced resistance to Doppler shift, reducing the construction cost of broadband wireless networks.
MiWAVE can operate in UHF (470MHz ~ 806MHz), a plurality of band 2.3G, 2.5G, 3.5G, 5.8G and so on, but also extended to other frequency bands based on actual demand, deployment flexibility. MiWAVE to bring the benefits of following the crowd is to let end users have more access options, including fixed / nomadic / portable / mobile access, more business to enjoy, surf the Internet, Email and wireless interactive digital television.
The system is one of the National Eleventh Five major projects, "next-generation broadband wireless mobile communications network" an important technical direction, is a supplementary program of 4G proposal. Its advantages in disaster relief mainly in the frame that is ready to use and can be high-speed transmission, the system peak data transfer rate of up to hundreds of megabytes. MiWAVE lake system has played an important role on the disposal of the 2008 Wenchuan earthquake.
◆ PDT: In 2008, led by the Chinese Ministry of Public Security police developed digital trunking system PDT is a combination of Chinese Situation and the truth, look international, digital communication standard concentration with Chinese characteristics, once started, attracted wide attention. After four years of hard work, the standard is expected to release in the near future. The PDT standard determines the following characteristics in our country it has good prospects:
◇ large district, low cost; less base, less cost of network construction investment and post-operational maintenance, in line with a large land area and the actual situation in China less money;
◇ analog MPT1327 trunking system a smooth transition to protect existing investments, users do not need re-planning network, frequency and change habits;
◇ improve the interconnection between systems and unified network management protocol, reference is made to meet the national network designed 3GPP IMS, SIP application reflects better interconnection capacity to meet the country's multi-vendor to build a large network of PDT requirements;
◇ secure voice call encryption to ensure the security, PDT standard designed optional hardware-based voice encryption scheme, security program can be used include authentication, air interface encryption and end to end encryption, key management mechanisms and links encryption, depending on the need to achieve a certain level of security to implement some or all of the features;
◇ proprietary design from the Chinese public security police use requirements, functional design closer to the actual needs of the Chinese police;
◆ GSM-R: System is an integrated special digital mobile communication system designed specifically for railway communication. It has advanced voice calling features, such as group calls, broadcast calls, multi-preemptive priority basis and business demolitions, adding location-based addressing and addressing functions and other functions, especially suitable for railway communications needs of railway dispatching communication . The main provider of wireless transfer columns, grouping shunting communications, maintenance and repair work zone communications, emergency communications, voice communications tunnel communication, providing data transmission channels for the automatic train control and detection information, and provide automatic addressing and passenger trains service. The system uses the ubiquitous GSM networks. The end of 2000 the Ministry of Railways GSM-R will officially determine the direction for the development of a dedicated railway communication, July 1, 2006 Qinghai-Tibet railway opened to traffic, marking the GSM-R communication system officially entered the stage of history of China's railway operations.
◆ PTT: PTT cluster system (PTT Push To Talk), is based on public mobile networks (GSM and CDMA) voice communications services, the user can use as walkie-talkies, one to one, one to many calls. The technology proposed in 1993 by the US mobile operator Nextel, 2010, China's Telecom launched the "Tianyi intercom" guilty of such communication, 2012 this business gradually accepted by customers.
◆ PPDR: Public protection and Disaster relief, public protection and disaster relief communications. It is the ITU-R (ITU-R) to coordinate the world, radio communication management study for the regional demand and technology issues important public protection and disaster relief radiocommunications. PPDR is the most important part of emergency communications, the government is to achieve an important guarantee for contingency plans, mainly by broadband radio communications.
4, characterized in the new era of professional communications is an organic fusion of multiple technologies and applications
1) integration of various modern communication technology is often integrated application of multiple technologies, to complement each other, complement each other's effects. A communication standard may use TDMA and FDMA access channel transmission may use a variety of channel coding. For compatibility, multi-mode multi-band terminal welcomed. Digital radio machine, in order to Kanemichi modulus, modulus using automatic identification technology allows users to experience a variety of high-tech brings convenience. Compatible with a variety of standards, a variety of vocoder digital radio single-chip have been available.
2) the integration of public and private networks to public people, the network and other new technology division in the period has been changed, the network has a cluster scheduling functions, the public can also have a scheduling function, PTT PTT described above, is the use of the public network cluster scheduling system. It is hoped that walkie-talkie and cell phone communications, but also want the phone can be used intercom.
3) narrowband and broadband convergence alone narrowband communication application limitations large image transmission broadband communications is often used in public security law enforcement, emergency situations, in addition to the intercom intercom outside must complete broadband transmission function. Recently, a walkie-talkie to the LTE direction more attention, this is the application the user wants to achieve broadband digital realm.
4) Light integration with conventional power cluster system for optical communication was limited, broadband optical communications technology, is driving the rapid increase in network speed, to bring people to the ubiquitous "Amazing experience." Optical fiber communication transmission attenuation of small, large capacity, free from outside interference, confidentiality, and can be used for ultra-high-capacity broadband communications. For example, through PON fiber network cable network covering the well region, the well point using splitter leads network optical signal with online optical network unit connected to the field of remote terminal equipment and video surveillance equipment, and field production data and video backhaul this is Huawei's communication scheme taken in oil field. Optical transmission continues to expand in the private network applications, optical fiber communication because it has an irreplaceable role.
5) the integration of a variety of network multi-network integration is the future direction of communication, enabling a variety of network interconnection of IP-based communications; the use of cluster gateway also allows each system interoperability. To complete the multimedia functionality, IP network, a public network, the narrowband clusters, cluster broadband, satellite communications completely fused together.
5, the relationship between companies and distributors in the development of new technologies is undergoing a dramatic change
Form a close relationship between companies and distributors in the interests of the community, through mutual recognition agreements and provisions of the common distribution of goods, develop and control the market. There are many intermediate business between dealers and users, including: wholesalers, retailers, agents and channels, and so on.
In walkie-talkie sales, for example, at the time of sale, the dealer or directly to the purchase of products or sales agents, these services are more intuitive, has a "hand money hand goods," the simple relationship. When the intercom clustered system, the dealer's ability to sell must be changed to the sales system, because customers are not only purchase the terminal. If broadband multimedia cluster system, because the system in a wide range of applications, the system itself is the application of a variety of techniques, each portion of each device has many features, the face of complex systems, past dealers may be done because these are not easy convenient than direct selling walkie-talkie, dealers scattered by the client object into focus, groups of individuals into sector units, sales operations to re-establish. Thereafter, the sales process, installation, commissioning and so on a non-individual person can be completed independently, product pre-sale, sale and will form an organic system, and even the formation of a service culture or a complete industrial chain, this enterprises must also be adjusted when the sales model Now, let stragglers organize, form a team, and there is an expertise team. Saying, "You lug worry, I lead a horse, ask where" retail approach has not brilliant.
6, only the digital radio technology in the new era have a more exciting use of space
In the new era, if a walkie-talkie enterprises, enterprises are facing greater pressure, we observed after application of broadband multimedia cluster system found in the intercom system application is not much, smart phones, a variety of feature-rich multimedia terminals, systems indispensable this is the base stations and other equipment customers need most, walkie-talkie enterprises are facing difficulties to survive in the new era. A terminal market space is not bundled with the system is very small, do not rely on a system of enterprises to survive a lot of pressure. This is the integration of various communication technologies challenges in the new era together issued to traditional enterprise! On the current point of view, we find that even if a number of the firm's output digital radio, almost no market, leaving aside the price is not that individual walkie-talkie conversation much better than analog, let alone say interconnection products, there are many problems. No products market, no business life.
For example, restaurants in the a la carte system is the multimedia applications, only staff with walkie-talkie touch screen can be quickly and accurately orders, modifications are also quite easy. Only in special digital radio network system can not display the same wonderful, intercom, SMS became adjunct. Application of digital radio in the multimedia cluster, so that both host and guest satisfaction harmony
7, enterprises in the era of new technology should be promptly and actively adjust their role
From these new technologies, the broadband transmission is the direction people want to get personal service, multimedia is the most appropriate way, and these are inseparable from digital technology, new technology in a variety of integrated applications today, especially in the past some SMEs walkie-talkie in the production of enterprises should adjust their roles as soon as possible, change the "Just do it, not afraid of no market," the traditional concept. In the new era, enterprises will face constant adjustments and changes: bankruptcy, peeled, split, division, asset replacement, repurchase shares, employee stock ownership plans, more and more. Enterprises should be based on what the attitude of the new technology era, this paper has the following recommendations are for reference only.
1) funds than enough, strong technical capacity of the enterprise - a comprehensive digital upgrade must master digital communications technology as soon as possible, the idea from analog completely to digital, to improve the scientific and technological quality of the enterprise as a whole on their own to deal with their own comprehensive the "digital" upgrade, the product aimed at the joint application of broadband communications and the public network, companies can directly into the development and production of digital systems or terminals, when the digital upgrade of Japanese companies, and also his gorgeous turn around.
2) market power still lack the ability to develop enterprise - to strengthen cooperation with foreign affiliates should master these new technologies, developers, manufacturers, distributors to establish relations of cooperation, and strive to complete the manufacture of a private network of some products, by the way "processing" start by improving the quality, optimize costs harmonious bilateral relations, and finally to independent development. Some companies specializes in sales, the sales team should be set up; some companies specializes in engineering, installation engineering team should be set up to provide power for the special network installation; some companies good price optimization, material optimization company should be set up specifically for the private network supporting optimized device.
3) Strong production capacity of independent innovation ability, or the ability to develop fair, poor corporate market - take the road to be integrated with the powerful manufacturers association, through the transformation of the shares and enhance their own strength, improve product and brand awareness, increase market Competitiveness. Quanzhou officials said there was good, "the face of the industry status quo, in the past Taiwanese businessmen accustomed to going it alone, rather be beheaded change taking place is not the concept of swallowtail. There are even some cases run good businesses are now willing to be larger acquisitions, integration, which in the 'heavy face' of the southern region in the past unthinkable. "
4) ability of the brand, the product of weak business - success is to choose the road of integration, SMEs can aim at a target market, communication oil fields, mines, schools, shopping malls, etc., integration of all successful enterprises, successful part dealers technology and application, a complete independent customer solutions, a positive energy solution provider or integrator to improve the overall operational capability in solution to found the market to meet the market for the development of a greater accumulation.
5) financial strength still, weak development of the enterprise - into digital flood Currently, all private network developing, PDT standard and special network technology is relatively mature, and become a leading digital private network system development. PDT system can produce nearly 15 companies nationwide, fewer companies producing PDT terminals, PDT supporting products such as terminals, channel machine, power supplies, circuit-switching diversity reception equipment, etc., can be shared by the enterprise, small and medium enterprises synchronized with PDT, McWiLL and other development, so that the living space of their own to give the digital trend.
6) accessory power, weak enterprise system capacity - join industry organizations, some companies move closer to the digital system is a provider of accessories, you can not think of their products to the D / A can be used along with, in his own free digital Troops outer. Accessories companies also should pay attention to digital product standards, should actively participate in some of the figures association, Union, on the one hand to grasp the dynamics of digital products, on the other hand can establish a trust relationship with a number of the whole enterprise within the Union, for the parts of the application to develop more large space for development.
7) chip design capability, companies face many uncertainties - focus on the latest digital trends, the pursuit of excellence to digital radio, for example, a number of chip companies have provided digital baseband solutions, which lingered in the standard, the patent conflict era has been to make efforts, commendable. But not difficult to find, the current digital product solutions still require a higher level of integration, and actively develop compatible multi-standard, multi-vocoder single-chip solution is the requirement. In addition, the chip how to adapt multimedia rich applications, radio and other digital applications are more design highlights these concerns, to a higher realm of digital sprint is always chip worker glorious mission. The rest of the broadband business, we must always pay attention to the international standard dynamic countries using dynamic, customer feedback, with the data speak, and to strengthen cooperation with the strength of enterprises, in cooperation with the venture capital firm, for development in line with market demand for products with the support of funds under.
8, in the high-profile event in positioning themselves
From the above analysis it is not difficult to see that China has not yet formed private network industry scale, the urgent need to promote the industrial chain; new private network communication technology after another, the urgent need to master; suppliers, distributors, integrators, distributors confused direction, roles in urgent need of conversion. Government support for professional communication ushered in a turning point of development. In order to further expand exchanges and promote integration between different technologies and different areas, the majority of users as soon as possible to improve the professional communications technology, products, enterprise comprehensive knowledge, allowing you to feel out of the office easily changing the outside world, I hope you can attend a high-profile, big vision, comprehensive exhibition.
2013 "Shenzhen International professional wireless digital communications and information technology Expo" will be held in Shenzhen Convention and Exhibition Center May 5th to 7th. This is a brilliant event for the industry, will become fully self-display the achievements of the General Assembly known enterprises from home and abroad manufacturers, suppliers, integrators, solution provider, etc., this large-scale exhibition, rich in content, clear division of exhibition digital forum is the best time to sort out their own, multi-network integration gives you refreshing. Entrepreneurs will see the unlimited business opportunities and development opportunities, manufacturers will get more sales channels and establish a more reliable partnership, people will experience the convenience of human communication and fast. Content forecasts show the following: "communication, digital, technology, applications" is the purpose of the General Assembly, promoting progress, accelerate industrial chain formed by the General Assembly is duty-bound mission to attend to visit and experts of relevant national leadership is to support the General Assembly to force . This exhibition, allowing you to better position themselves in the digital world. You will see that the exhibition is a beautiful stage, she let the communication workers here enjoy performing; the show is a massive platform, she let the latest communication achievements in full display here, the exhibition is a harmonious family, she makes domestic and foreign friends are gathering here, spread all over the world to communicate and knee to knee friendship! My friends, we are entering the era of impressive 4G, bathing communications sector intoxicating spring, spring garden look professional communication design will be much magic professional communication in spring pupate into a butterfly, "good rain knows the season, when spring is," let us with open arms, cheering professional communications arrival of spring!
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