通信專業(yè)畢業(yè)設(shè)計外文翻譯---2g的潛力-免費閱讀
【正文】 for example, WLAN systems can provide bit rates up to several tens of Mbps (100Mbps) in hot spots, which is much more than the standard UMTS can provide. 2. Mobile telemunication consumers The mobile munication consumer market in Nigeria can be divided into three segments: highend, middlelevel, and lowend [2]. The highend market includes businessmen, high ranking managers, field service engineers, and journalists who have the ability to pay and are frequently on the move and in great need of highquality munication. It also includes early adopters of new mobile services such as young IT professionals and university students and researchers. All of the highend users already have mobile phones and use them heavily. The middle level market includes salaried or retired people and other students. These are people in moderate need of munications with local mobility. This group of people does not have high purchasing power. Their spending on munication is less than N 1500 (US $13) per month. Although most middle level users have mobile phones, they use them only when it is necessary. The lowend market includes farmers, low ine workers and those who usually stay locally. Their spending on munications is less than N 580 (US $5) per month. The vast majority of them do not even have regular fixedline phones. 共 8 頁 第 6 頁 3G as a more advanced technology than 2G/, the initial target market of 3G will be the highend market who contributed a little less than 1% of Nigeria population(as at December 2020, Nigeria Communication Commission gave a position statement that only 40 millions of Nigeria population have access to telephone line either live or dead). 3G will be attractive to those who need additional highquality mobile munication services, over and above what 2G/ can provide and are willing to pay the premium. 3. Cost Implication Deploying 3G is obviously a very costly venture and the aim of an operator is to satisfy customers and therefore make profit. The biggest operator investment will clearly be building out the radio access work apart which is and does not incl ude huge cost of license. This huge investment therefore requires a breakeven plan by the operator makes to bear on the consumers. A similar history of this can be seen in consumer reaction to the entry of GPRS service into the Nigeria Teles industry。政府應(yīng)確?，F(xiàn)有的開發(fā)商在改善自己的 2G 的服務(wù)質(zhì)量方面不放松。這種應(yīng)用在 3G 終端相對容易實現(xiàn)。 因此， 3G 較高的接入成本使得其取代 2G 成為一項艱巨的任務(wù)。 3G 將吸引這樣一些人，他們需 要超出 2G/ 所能提供的高質(zhì)量移動通信服務(wù)并愿意支付額外保險費。這些都是對當?shù)匾苿油?信有一般需要的人。 不過， GSM 技術(shù)是絕不是走到了其生命的盡頭。但他也存在著一些問題使其難以利用新興的 3G 應(yīng)用。因此，一個 WCDMA的 5兆赫頻率載波可容納 25 GSM頻率載波可轉(zhuǎn)換成 200GSM 傳輸信道。雖說 2G 的缺點帶動了 3G 的發(fā)展，但是這并不證明必須放棄它的平臺。 但 是僅僅是因為 2G 缺乏系統(tǒng)能力，這也不足以使 3G 系統(tǒng)的建設(shè)成為必然。 目前設(shè)計的 2G 網(wǎng)絡(luò)只能完成語音信息傳輸，實時傳輸多媒體要通過 GSM +空中接口并帶有極大困難。語音，視頻和其他形式的數(shù)據(jù)融合成多媒體服務(wù)。它還包括年輕的 IT 專業(yè)人士，大學生和研究人員等新移動服務(wù)的早期使用者們。 他們對通訊的支出每月不足 580 N（ 5 美元）。 盡管如此，人們越來越清楚， 3G 技術(shù)在尼日利亞電信空部署可能遭受長期的低訂購量失?。ㄖ辽僭谶M入階
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