【正文】 ble to provide service for everybody in these traffic hot spots. But the lack of capacity in 2G systems alone does not make the building of 3G systems necessary. Current phone usage is still mostly voice, and this traffic could be handled quite easily by just adding extra frequency allocations to 2G works (. from the UMTS spectrum[5Mhz]). Breaking it down, one GSM frequency carrier takes 200kHz bandwidth and can acmodate eight traffic channels. Thus, one WCDMA 5MHz frequency carrier could acmodate 25 GSM frequency carriers, translating into 200 GSM traffic channels. In practice, the number of traffic channels is lower, as control channels use part of the capacity, and also in TDMA systems, the same frequency cannot be reused in nearby base stations. Therefore, a 5MHz frequency slice would offer lots of new capacity for a GSM system. Apparently, the character of mobile munications will evolve considerably in the ing years, and data in their many forms will bee more and more important. Voice will remain an important ponent in telemunications, but quite often it will be bined with other types of information to form multimedia applications. The current 2G works were designed to transfer voice traffic only。 本文對(duì) 2G 和 3G 的分析，意味著一個(gè)技術(shù)的成功不僅與技術(shù)本身的表現(xiàn)有直接關(guān)系，還受其他許多因素的影響，包括市場(chǎng)需求，商業(yè)模式和政府的政策，其他國(guó)家的經(jīng)驗(yàn)有助于證明這一點(diǎn)。這項(xiàng)規(guī)定僅僅是增加渠道。這可能主要是由于預(yù)計(jì)市場(chǎng)份額不當(dāng)或低普及率，例如四百萬(wàn)尼日利亞中的 1％用戶已經(jīng)接入 GSM（全國(guó)協(xié)商， 2020 年 12 月提供），用于視頻通話和 35k/kbytes 高關(guān)稅（ N1/sec 百萬(wàn)數(shù)據(jù)），經(jīng)營(yíng)不佳和在這樣一個(gè)中低層次消費(fèi)者的占總?cè)丝?97％多的市場(chǎng)中與實(shí)際需要的脫節(jié)。他們中絕大多數(shù)人甚至沒(méi)有正規(guī)固定電話。所有的高端用戶已經(jīng)擁有移動(dòng)電話并廣泛的使用它們。 所提 供的帶寬 共 8 頁(yè) 第 2 頁(yè) 是固定的，不能根據(jù)需要?jiǎng)討B(tài)分配。 GSM 產(chǎn)生于 20 世紀(jì) 80 年代末，當(dāng)時(shí)對(duì)電信世界的需要和期望是完全不同于今天的。 當(dāng)前使用手機(jī)仍然是主流，并且可以僅增加分配到 2G網(wǎng)絡(luò)額外的頻率（從 UMTS頻譜 [5MHz 的 ]）就可很容易的解決通信擁塞問(wèn)題。 共 8 頁(yè) 第 1 頁(yè) 譯文標(biāo)題 2G 的潛力 原文標(biāo)題 Untapped Capabilities of 2g 作 者 Stephen 譯 名 斯蒂芬 國(guó) 籍 尼日利亞 原文出處 International Journal of Inter and Enterprise Management 譯文： 2G 的潛力 斯蒂芬 摘要 ： 3G 無(wú)線技術(shù)的出現(xiàn)顯然正將 2G 網(wǎng)絡(luò)推動(dòng)幕后并逐步將他們推 入遺忘的深淵。一個(gè) GSM 頻率載波采用 200 kHz帶寬分解后可同時(shí)容納 8條信道 。 此外， GSM 系統(tǒng)多年為滿足日益增長(zhǎng)的新要求，發(fā)展地非常成功。這降低了頻譜的使用效率。中層市場(chǎng)包括受薪或退休人士和其他學(xué)生。 3G 作為比 2G/，其最初的目標(biāo)市場(chǎng)將是占尼日利亞不足 1％人口的高端市場(chǎng)（尼日利亞通信委員會(huì)發(fā)表的聲明指出截至到 2020 年 12 月，無(wú)論線路暢通 與否，只有四千萬(wàn)尼日利亞人口使用電話）。此外，新 共 8 頁(yè) 第 3 頁(yè) 的移動(dòng)服務(wù)的早期采用者 ， 如 IT 專(zhuān)業(yè)人士和年輕的大學(xué)生和研究人 員可推動(dòng)最初的市場(chǎng)。 互聯(lián)網(wǎng)接入 互聯(lián)網(wǎng)接入是一個(gè)幾乎在所有通信領(lǐng)域都有要求的應(yīng)用。在技術(shù)方面提高服務(wù)質(zhì)量是 2G 生存的關(guān)鍵，技術(shù) 發(fā)展成熟也是 3G 的重大挑戰(zhàn)。 realtime multimedia can be 共 8 頁(yè) 第 5 頁(yè) transferred via the GSM phase2+ air interface only with great difficulty. GSM was designed at the end of the 1980s. The needs and expectations of the telemunication world then were totally different from those of today. Furthermore, the GSM system has evolved over the years very successfully to meet the new incremental demands, it has some problems that make it difficult to use for the emerging 3G applications. The biggest problem is the relatively inflexible air interface. An application that gen