PHS Network Optimization Technology And Realization Of Chang Chun City

Along with the high-speed development of economic construction of our country, people's work and the rhythm of life speed up day by day, unceasingly enhance communication service demand. The original traditional wired narrow band voice feature has not been able to meet people's communication need by far. The miniaturization of communication equipments which satisfy the customer to use in any movable scope become the main current of communication develop nowadays, especially in the wireless communication realm, 5 W (Whoever: Anyone; whenever at any one time; wherever: in any location; whomever: anyone; whatever: carries out any communication need) is already the irresistible general trend. The request of communication equipments show diversified development direction.In the future personal communication will develop diversified direction which show digitalization,comprehensive,broadband,intelligence,standardization and personalized. There are all kinds customers which travel extensively all over the world,travel in domestic and only in the city.For different customers, we can provide the different communication means, such as"iridium"system that Motorola initiate, the characteristics is its few channels, the price is high; the wireless communication contact among the cities, already large-scale adoptively is a land ambulation communication system. For the second customers, currently the essential position is the 2 generation GSM and the 2.5 generation IS-95 CDMA, and the 3 generation system will adopt CDMA as leading technique. The characteristic of this system is convenient for traveling extensively among the city. But for the 3 customers, it need the low speed to move in the hot region, can't undertake the very high communication service charge at the same time. Therefore it adopt the third wireless system to overlay, then tiny beehive system in the city of hot region( such as community, exposition...etc.), The typical model system is the DECT of Europe, the PACS of United States and the PHS of Japan, in these three kinds of systems, the most mature system is PHS of...