Construction and optimization of China Unicom cdma1x Network

CDMA network currently through the two period of construction, has reached a total network of 35 million capacity, has been covered to 340 cities nationwide. Through the construction of the two-phase network, the entire network coverage and the stability of the network operation have been significantly improved. Recently completed CDMA two-phase construction, its network scale in the first phase of 15 million capacity based on the construction of 20 million capacity, greatly improved the CDMA network in the country's urban coverage situation. Many users in the two period of construction has been very good income. During the construction of CDMA two, the 70% coverage of the whole network is upgraded to CDMA 1X network, which is 2.5 generation network. CDMA 1X Network has been covered in Lhasa, and now Unicom is the most extensive network covering wireless data network, and provides a very good wireless data business platform.

At present, CDMA 1X Network can provide a platform of 53.6Kbps peak rate. Since Unicom's 1X network is relatively loose to the wireless environment, when using the 1X wireless data platform, the rate is generally above 70Kbps, which is equivalent to the rate of ISDN adopted by Unicom on the fixed web. Recently through a large number of network optimization, so that Unicom wireless data access time of not more than 3.5 seconds, data connection from the input to the activation of the length of not more than 2 seconds, the entire system certification success rate reached 99.05%, stability in the current business network is also in the relatively advanced. To further expand the wireless coverage of Unicom's CDMA network, and in order to provide users with better, wider data bandwidth, China Unicom has started in the summer, the third phase of the CDMA project started. After the completion of the third phase, the whole network will be over 50 million capacity. In addition to increasing the capacity bandwidth of wireless data, the third phase project will further expand the area coverage and depth coverage. That is, the majority of users are concerned about the indoor coverage in the city. Unicom provides the wireless data throughput, will be based on the current higher bandwidth.

In order to provide high quality wireless data Service platform, Unicom will be in the third phase of the project on the basis of increased network optimization, so that the stability of wireless data platform is also in the industry's leading position. Unicom will strive to improve the success rate of CDMA-specific wireless operation services, continuously strengthen the common rate between CDMA hardware, and put forward a wireless data model that is more in line with the actual situation of the Chinese market. Unicom's goal is through the construction of the third phase of the project, so that the CDMA 1X network in the network coverage or the performance of the network with other network platforms are equal, each has characteristics, the Unicom CDMA 1X in the data platform to transform the advantages of the advantage of CDMA network platform. (Computer science)

In order to enable users to roam between GSM network and CDMA network, in order to enable China Unicom 60 million GSM network users to enjoy the current advanced CDMA1X wireless data business, Unicom with Qualcomm, ZTE Company, conducted a GSM 1X network experiment. Industry from the "Communications industry newspaper" This topic can also get the success of the Suzhou Experiment. This is the unicom to improve the CDMA network, improve the core competitiveness of enterprises an important measure. Through the use of Unicom's dual-mode terminals, GSM users will be able to enjoy the CDMA 1X high-speed data services. This time in Suzhou, Qualcomm has come up with a prototype of the dual-mode terminal, Unicom in Suzhou's experiment is to use this dual-mode terminal for up to 20 items of testing. In the second phase of the experiment, it completes the roaming of GSM carrier network of CDMA users to other countries. This experiment uses two programs, one is the first phase of the MMN approach, that is, the mobile soft switching node, while using the GPG scheme, the so-called GSM 1X Mobile gateway system. Take a very transparent approach to delivering all kinds of business in a high-level agreement. From the current experimental situation, the results are exciting. So Unicom believes that the success of the GSM 1X experiment, will promote the CDMA 1X industry value chain win more.

Like all the other big operators in the world, Unicom is also actively conducting some technical experiments on 3G, including some commercial test systems. Recently Unicom has successfully conducted EV-DV experiments, and the results are also very exciting. In the evolution of CDMA2000 will naturally take into account the CDMA 1X and EV-DV problems, unicom feel that ev-dv indeed with the 1X network layout is relatively consistent, its network upgrades and other aspects are relatively easy. According to current standards, the peak rate has reached 3.1 trillion bps, the upward standard can also reach the 307KBPS,ELXD standard, the rate will be higher. Unicom now to comprehensively promote the CDMA EV-DV technology standardization, but also hope that the CDMA EV-DV chip research and development speed further accelerated. At the same time in CDMA EV-DV technology, the speed of the operation on the network will be accelerated at any time. In the process of CDMA network upgrade, China Unicom has always been concerned about the compatibility of the problem, also take into account the separation of cards, hope that the industrial chain support card separation terminal further promotion. In order to make the entire CDMA network can be further development, Unicom hope that the production cost of CDMA chips will be further reduced, provide more favorable prices.