The following contents come from Daqing Oilfield Information Port:
The oilfield communication "PHS" will not be delisted.
On the anniversary, people affectionately called the oilfield communication SCDMA system "PHS", but this PHS is not PHS, nor is it a PHS cancelled by the state. In other parts of China, it is customary to call Japanese PHS system PHS. PHS is a backward technology in Japan in 1980s. Since the introduction of 1997 in China, it has been accused of "illegal operation" by people in the industry, because it occupies the 1880- 1920MHz frequency band that has not been officially allocated by the state, and this frequency band is also planned to be used by TD-SCDMA system, one of the future 3G standards. Now that the 3G license has been issued, the state will clear the frequency of PHS before the end of 20 1 1, which has ensured that it will not cause harmful interference to TD-SCDMA system. SCDMA wireless access system is an advanced wireless communication technology independently innovated by the state, which is strongly supported by the state. The frequency band 1785- 1805MHz used by the SCDMA system is national-specific, completely legal, and there is no problem of frequency clearing and network withdrawal, and it will not be cancelled. The SCDMA system of Daqing Oilfield Communication is large in scale, with 250,000 users. At present, it is still under the key development and guarantee, and there is no possibility of dismantling the net. In 2009, Oilfield Communication will invest tens of millions of yuan to increase base stations, and on this basis, develop wireless broadband and digital acquisition systems. Please feel free to use them.
After ten years of hard research, Beijing Xinwei Communication Technology Co., Ltd., a subsidiary of Datang Telecom Group, has established a SCDMA wireless communication platform with all independent intellectual property rights and realized large-scale industrialization. Based on this platform, complete wireless access solutions including 1800M SCDMA wireless local telephone system, 400M SCDMA rural wireless access system and McWiLL broadband wireless access system can be provided. SCDMA is the abbreviation of synchronous code division multiple access wireless access technology. It is a brand-new wireless communication technology standard with completely independent intellectual property rights in China and has the international leading level. SCDMA system is the first wireless communication system in the world that adopts international advanced technologies such as smart antenna, synchronous code division multiple access and software radio and has been successfully commercialized.
As a supplement and extension of the fixed telephone network, 1800M SCDMA wireless local telephone system is aimed at low-and middle-income consumers who account for about 70% of the total population in China. 1800M wireless local telephone system can fully guarantee the voice quality during the call because of good network coverage, so that it often appears the phenomenon of "disconnection" due to poor network coverage. When the user moves at the speed of 120km/h, the call is completely normal and the handover success rate is above 97%. Moreover, the maximum transmission power of 1800M mobile phone terminal is only 0.2W, and the average transmission power is 0.05W W. It does not radiate low-frequency electromagnetic waves and has no adverse effects on human health. Obtained the only green star product certificate issued by the Ministry of Information Industry.
McWiLL is a new generation broadband wireless access system developed by integrating advanced technologies such as multicarrier, zeroing, adaptive modulation and coding on the SCDMA platform. It can provide world-leading high bandwidth, high capacity and excellent NLOS transmission capability, and can simultaneously carry large-capacity mobile voice and broadband data services, achieving the best combination of high performance and low cost. It can not only provide the public with cheap and high-quality mobile voice services, but also provide a variety of highly competitive mobile data value-added services. It can also build a secure and mobile virtual private network for customers in industries such as the party, government and army, and provide unified communication of voice, data and video. At the same time, due to the portable and plug-and-play characteristics of McWiLL terminal, individual users can enjoy ubiquitous and all-weather personal mobile communication services.
Among them, the 400M SCDMA rural wireless access system is tailor-made for the "village-to-village communication project" in rural areas of China. Due to the complex terrain and difficult maintenance in rural areas, the system adopts Hong Fengwo wireless access network with large coverage radius, and the effective coverage radius of a single base station reaches 55 kilometers, which is suitable for low traffic network coverage in rural areas. Moreover, it has the characteristics of power saving, lightning protection, solar energy and other power supply solutions, which is very suitable for the realistic environment in rural areas of China, so it has become the first choice for rural telecom universal service recommended by the Ministry of Information Industry.
SCDMA system is rich in services, low in cost and high in service quality, which adapts to the basic national conditions of China and the vast number of developing countries in the world. Since the establishment of 200 1 Daqing Oilfield Communication Network, the wireless access system of SCDMA has been widely used in Sichuan, Guangxi, Shaanxi, Gansu, Hebei, Inner Mongolia, Jiangsu, Zhejiang, Shanxi, Guangdong, Xinjiang, Qinghai, Liaohe Oilfield and Karamay Oilfield. SCDMA not only has more than 4 million urban users and a large number of rural users in China, but also has gone abroad. Independent innovation of SCDMA technology will continue to strive to serve the wider people of China!
Daqing oilfield communication