移動(dòng)通信技術(shù)發(fā)展趨勢(shì)-wenkub.com
2025-06-22 03:25 本頁(yè)面
【正文】 s aggravating as well as the market control policy39。s use frequency band is also 900 MHz. In the second generation of network, the GSM system39。s intellectualized development, the motion intelligent network lives from this. About the motion intelligent network39。 The voice call will unify with the realtime image, produces the massive visible mobile phone, will also realize moves the Internet and World Wide Web glances over. Wireless videoconference such application will find at everywhere likely, electronic merce will develop vigorously. Also has each kind of mailbox and the entertainment anytime and anywhere regarding the movement in user serves. Networking wide band In the telemunications industry history, the mobile munication possibly is the technology and the market development quickest domain. The service, the technology, the market three between are one kind of interactive relations, follows the user to the data, multimedia service demand increase, the network service to the digitization, the grouping development, the motion network is moving toward the wide band inevitably. Through the use telephone exchange technology and the honeyb radio technology, were born in the late 70s the first generation of simulation mobile phone. AMPS (North America honeyb system), NMT (Northern Europe mobile phone) and TACS (omnidirectional munications system) is three kind of main narrow band mock standard. A first generation of wireless networking39。s pursue to move toward successfully anytime and anywhere. Mobile munication39。s yearly rate will reach as high as 300%, obviously the user will turn on Internet39。s dividing line bees fuzzy, the people need not to divide, the place visit very important information. Will occur will bee the actuation wireless data traffic development on the user body39。s GPRS. application actuates the market The wireless data traffic39。s HSCSD。s wide band, networking39。未來(lái)的網(wǎng)絡(luò)將向?qū)拵Щ?、智能化、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。2002年將投入商用的第三代系統(tǒng) IMT2000則定位在2GHz頻段。1981年誕生的第一個(gè)具有國(guó)際漫游功能的模擬系統(tǒng)NMT的使用頻段為450MHz,1986年NMT變遷到900MHz頻段。五、更高的頻段1998年1月,歐洲電信標(biāo)準(zhǔn)研究所(ETSI)在GSM phase2+階段引入了CAMEL協(xié)議(移動(dòng)通信高級(jí)邏輯的客戶化應(yīng)用程序),當(dāng)時(shí)的版本是Phase1。 移動(dòng)通信需求的不斷增長(zhǎng)以及新技術(shù)在移動(dòng)通信中的廣泛應(yīng)用,促使移動(dòng)網(wǎng)絡(luò)得到了迅速發(fā)展。2000年以后,窄帶移動(dòng)電話業(yè)務(wù)需求將依然很大,但隨著Internet等高速數(shù)據(jù)通信及多媒體通信需求的驅(qū)動(dòng),寬帶多媒體綜合業(yè)務(wù)將逐步增長(zhǎng),而且就未來(lái)信息高速公路建設(shè)的無(wú)縫覆蓋而言,寬帶移動(dòng)通信作為整個(gè)移動(dòng)市場(chǎng)份額的子集將顯得愈來(lái)愈重要。AMPS(北美蜂窩系統(tǒng))、NMT(北歐移動(dòng)電話)和TACS(全向通信系統(tǒng))是三種主要的窄帶模擬標(biāo)準(zhǔn)。話音呼叫將與實(shí)時(shí)圖像相結(jié)合,產(chǎn)生大量的可視移動(dòng)電話,還將實(shí)現(xiàn)移動(dòng)因特網(wǎng)和萬(wàn)維網(wǎng)瀏覽。移動(dòng)通信演進(jìn)的下一階段是向無(wú)線數(shù)據(jù)乃至個(gè)人移動(dòng)多媒體轉(zhuǎn)移,這一進(jìn)展已經(jīng)開(kāi)始,并將成為未來(lái)重要的增長(zhǎng)點(diǎn)。對(duì)較短的“突發(fā)”類(lèi)型業(yè)務(wù)是理想的,如信用卡認(rèn)證、遠(yuǎn)程測(cè)量和遠(yuǎn)程事務(wù)處理。 為了滿足接入因特網(wǎng)的需求,一個(gè)全球性的開(kāi)放協(xié)議——無(wú)線應(yīng)用協(xié)議(WAP)應(yīng)運(yùn)而生。在我國(guó),因特網(wǎng)用戶的年增長(zhǎng)率將高達(dá)300%,顯然用戶在運(yùn)動(dòng)中接入因特網(wǎng)的需求將會(huì)增長(zhǎng)。話音是單一的、易于被大眾所接受的業(yè)務(wù),然而無(wú)線數(shù)據(jù)則不同,無(wú)線數(shù)據(jù)最初的應(yīng)用重點(diǎn)放在運(yùn)輸管理這樣的專(zhuān)業(yè)市場(chǎng)。 (1)應(yīng)用驅(qū)動(dòng)市場(chǎng) 無(wú)線數(shù)據(jù)——生機(jī)無(wú)限當(dāng)前移動(dòng)數(shù)據(jù)通信發(fā)展迅速,被認(rèn)為是移動(dòng)通信發(fā)展的一個(gè)主要方向。了解、掌握這些趨勢(shì)對(duì)移動(dòng)通信運(yùn)營(yíng)商和設(shè)備制造商均具有重要的現(xiàn)實(shí)意義。 移動(dòng)通信業(yè)務(wù)之所以發(fā)展迅猛主要是其滿足了人們?cè)谌魏螘r(shí)間。了解、掌握這些趨勢(shì)對(duì)移動(dòng)通信運(yùn)營(yíng)商和設(shè)備制造商均具有重要的現(xiàn)實(shí)意義。關(guān)鍵詞： 移動(dòng)通信 Internet 無(wú)線數(shù)據(jù) IMT2000 智能網(wǎng) 網(wǎng)絡(luò)融合一、移動(dòng)通信的意義所在任何地點(diǎn)與任何個(gè)人進(jìn)行通信的愿望。二、網(wǎng)絡(luò)業(yè)務(wù)數(shù)據(jù)化、分組化近年來(lái)出現(xiàn)的移動(dòng)數(shù)據(jù)通信主要有兩種,一種是電路交換型的移動(dòng)數(shù)據(jù)業(yè)務(wù),如TACS、AMPS和GSM中的承載數(shù)據(jù)業(yè)務(wù)以及GSM系統(tǒng)的HSCSD。近期無(wú)線數(shù)據(jù)業(yè)務(wù)的目標(biāo)市場(chǎng)是銷(xiāo)售人員或現(xiàn)場(chǎng)工程師這樣的用戶群。WAP為將Internet的信息內(nèi)容以及增值業(yè)務(wù)傳送到移動(dòng)終端提供了
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