移動(dòng)通信技術(shù)發(fā)展趨勢(shì)-文庫(kù)吧
2025-06-10 03:25 本頁(yè)面
【正文】 到900MHz頻段。我國(guó)目前的模擬TACS系統(tǒng)的使用頻段也為900 MHz。在第二代網(wǎng)絡(luò)中,GSM系統(tǒng)的開(kāi)始使用頻段為900MHz,IS95 CDMA系統(tǒng)為800MHz。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。2002年將投入商用的第三代系統(tǒng) IMT2000則定位在2GHz頻段。六、網(wǎng)絡(luò)趨于融合,走向統(tǒng)一 技術(shù)的發(fā)展、市場(chǎng)需求的變化、市場(chǎng)競(jìng)爭(zhēng)的加劇以及市場(chǎng)管制政策的放松將使計(jì)算機(jī)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(diǎn)。未來(lái)的網(wǎng)絡(luò)將向?qū)拵Щ⒅悄芑?、個(gè)人化方向發(fā)展,形成統(tǒng)一的綜合寬帶通信網(wǎng),并逐步演進(jìn)為由核。心骨干層和接八層組成、業(yè)務(wù)與網(wǎng)絡(luò)分離的構(gòu)架。Mobile munication technological development tendencyAbstract: This article elaborated the modern mobile munication technology six big most recent development tendency in detail: The network service39。s digitization, the grouping, networking39。s wide band, networking39。s intellectualization, a higher frequency band, the more effective use frequency, the network tends the fusion, the trend unification. The understanding, grasps these tendencies has the vital practical significance to the mobile munication operator and the equipment manufacturer. Keywords ： Mobile munication Internet Wireless data IMT2000 Intelligent network Network fusion Mobile munication39。s significance is at The reason that the mobile service the development swift and violent was mainly it has satisfied the people in any time. Any place carries on the correspondence with any individual the desire. The mobile munication realizes in the future the ideal persontoperson munication service way that must be taken. In the information support technology, the market petition and under the demand bined action, the mobile munication technology39。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 HSCSD。 Other one kind is the packet switching migration data traffic, like Motorola39。s DataTAC, Ericsson39。s Mobitex and GSM system39。s GPRS. application actuates the market The wireless data traffic39。s main driving influence lies in the user the application. The voice is sole, easy the service which is accepted by the populace, however the wireless data is different, the wireless data initial application key places transportation management such professional market. In the near future the wireless data traffic39。s target market will be the sales personnels or scene engineer such user group. Sends the goal from these in the application to accumulate the wireless data the fi
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