移動通信技術(shù)發(fā)展趨勢(存儲版)
【正文】 目標的應(yīng)用中積累無線數(shù)據(jù)的經(jīng)驗,并從中受益。另外一種是分組交換型的移動數(shù)據(jù)業(yè)務(wù),如摩托羅拉的DataTAC、愛立信的Mobitex和GSM系統(tǒng)的GPRS。移動通信是實現(xiàn)未來理想的個人通信服務(wù)的必由之路。移動通信技術(shù)發(fā)展趨勢摘要：本文詳細論述了現(xiàn)代移動通信技術(shù)的六大最新發(fā)展趨勢:網(wǎng)絡(luò)業(yè)務(wù)的數(shù)據(jù)化、分組化,網(wǎng)絡(luò)技術(shù)的寬帶化,網(wǎng)絡(luò)技術(shù)的智能化,更高的頻段,更有效利用頻率,網(wǎng)絡(luò)趨于融合、走向統(tǒng)一。在信息支撐技術(shù)、市場競爭和需求的共同作用下,移動通信技術(shù)的發(fā)展更是突飛猛進,呈現(xiàn)出以下幾大趨勢:網(wǎng)絡(luò)業(yè)務(wù)數(shù)據(jù)化、分組化,網(wǎng)絡(luò)技術(shù)寬帶化,網(wǎng)絡(luò)技術(shù)智能化,更高的頻段,更有效利用頻率,各種網(wǎng)絡(luò)趨于融合。 (2)因特網(wǎng)的影響1999年商用化的GPRS是第一個GSM分組數(shù)據(jù)應(yīng)用,將實現(xiàn)超過100kbit/s的數(shù)據(jù)速率。移動通信的商業(yè)價值和用戶市場得到了證明,全球移動市場以超凡的速度增長。三、網(wǎng)絡(luò)技術(shù)的寬帶化 通過使用電話交換技術(shù)和蜂窩無線電技術(shù),70年代末誕生了第一代模擬移動電話。今天世界市場的第二代數(shù)字無線標準,包括GSM、MMPS、PDC(日本數(shù)字蜂窩系統(tǒng))和IS95 CDMA等,均仍為窄帶系統(tǒng)。 1997年末,美國蜂窩電信工業(yè)協(xié)會(CTIA)制定了移動智能網(wǎng)的第一個標準協(xié)議——IS41D協(xié)議。為了從根本上提高GSM系統(tǒng)的容量,1997年出現(xiàn)了1800MHz系統(tǒng),GSM 900/1800雙頻網(wǎng)絡(luò)迅速普及。 技術(shù)的發(fā)展、市場需求的變化、市場競爭的加劇以及市場管制政策的放松將使計算機網(wǎng)、電信網(wǎng)、電視網(wǎng)等加快融合為一體,寬帶IP技術(shù)成為三網(wǎng)融合的支撐和結(jié)合點。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 rapid, was considered that is a mobile munication development main direction. In recent years appeared the migration data munication mainly had two kinds, one kind was the circuit switching migration data traffic, like in TACS, AMPS and GSM load bearing data traffic as well as GSM system39。s ten years, the traditional life style rapidly was already changing, the people regularly migration, between the occupation and individual life39。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 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 inform
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