移動通信技術發(fā)展趨勢(文件)
【正文】 e support which and the bining site three nets fuse. Future network to the wide band, the intellectualization, the personalized direction will develop, forms the unified prehensive wide band munications network, and gradually evolution for by nucleus. The heart backbone level and meets the skeleton which eight positions, the service and the network separate. 8 / 8。s change, market petition39。s wireless frequency band will follow one kind of trend of development again from low to high. in 1981 was born first had the international roaming function analogous system NMT use frequency band is 450MHz,1986 the year NMT vicissitude to the 900MHz frequency band. Our country present simulation TACS system39。s actuation, the wide band multimedia synthesis services will grow gradually, moreover the seamless cover which will construct on the future information superhighway says, the wide band mobile munication will take the entire migration market share the subset will appear more and more important. Networking intellectualization The mobile munication demand grows as well as the new technology unceasingly in the mobile munication widespread application, urged the motion network to obtain the rapidly expand. The motion network by purely the transmission and the exchange information, gradually to the memory and process information39。 The short note will bee has the picture and the video frequency content electronic postcard。s local area network and wireless image. in 1999 mercialized GPRS was the first GSM integrated data application, will realize surpasses 100kbit/s the data rate. To short “arises suddenly” the type service is ideal, like the credit card authentication, the longdistance survey and the longdistance business process. EDGE (enhancement data rate GSM improvement pattern) uses has revised the GSM modulation system to realize surpasses 300kbit/s the data rate. EDGE will let the GSM operator profit specially, not only they may win the third generation mobile munication the management license, but may also provide has the petitive power wideband data service. Causes the early time mobile munication to the voice correspondence39。s Internet user quantity will double in the future. In our country, the Internet user39。s ten years, the traditional life style rapidly was already changing, the people regularly migration, between the occupation and individual life39。s Mobitex and GSM system39。s development is progresses by leaps and bounds, presents the following several general trends: The network service digitization, the grouping, the networking wide band, the networking intellectualization, a higher frequency band, the more effective use frequency, each kind of network tends the fusion. The understanding, grasps these tendencies has the vital practical significance to the mobile munication operator and the equipment manufacturer. 2Network service digitization, grouping The wireless data vitality infinite current migration data munication development is rap
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