Wireless Network Optimization Of 3G Mobile Communication System

The third generation mobile communication systems operating licence to be issued in China, wireless network optimization technology research for 3G system showing a growing urgency and importance.This article according to the 3G mobile communication system's technical standard, elaborated present three kind of mainstream 3G system—WCDMA system, cdma2000 system and TD-SCDMA system's wireless network characteristic and radio's frame structure, and get the similarities and differences between them through has analyzed by synthesis comparison: three kind of 3G system's foundation technology is the code division multiple access technology, but their system performance and radio's structure has respective characteristic, specially, TD-SCDMA system used time division duplex technology to realize space division multiple access technology using the smart antenna technology, raised the wireless frequency spectrum use ratio. Simultaneously points out the prospect of three kind of 3G system in China: WCDMA system's technology is maturest, it's commercialization is most widespread; cdma2000 system upgrade cost is lowest, it's promotion speed is quickest; TD-SCDMA system's new technology are most, it's superiority on policy are most.Then elaborated the wireless network environment and the most commonly used wireless dissemination model in the mobile communication system, expands from the 2G system's wireless dissemination model to the 3G system's wireless dissemination model, based on these we described the flow and the method about the mobile communication system wireless network optimizes in detail. Simultaneously unifies my own practical work, through WXUNICOM's cdma2000 system wireless network optimization project process, had pointed out the importance and the systematic characteristic of the wireless network optimizes in the mobile communication system, and has confirmed the optimized work to the wireless network performance improvement. Based on the theory and experience of 2G system wireless network optimization, and based on the wireless characteristic and the technical characteristic of 3G system, I proposed 3G system wireless network optimizes technical characteristic: 3G system wireless network optimization has the same flow and method to 2G system, but in the hand-over control, the interference control and in the service load stabilization management has own characteristic, and between these three kind of 3G system in optimization techniques detail also different, like cdma2000 system's PN optimization, TD-SCDMA system's relay hand-over optimization and so on.Finally, summarizes the above research, the study and the work, induces the conclusion of this topic, and pointed out that the Chinese 3G system license dispense later causes the deficiency on this topic, proposed may following research topic.