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width='300' height='200'><a target='_blank'><img src='https://ad.eepw.com.cn/www/delivery/avw.php?zoneid=87&cb=INSERT_RANDOM_NUMBER_HERE&n=a576c0a2' border='0' alt='' /></a></iframe> </div> <span id="contentlabels" style="font-size:14px;"><p>　　<a class="contentlabel" href="http://cafeforensic.com/news/listbylabel/label/3G"><em>3G</em></a>時(shí)代的到來，將大大促進(jìn)對(duì)網(wǎng)絡(luò)帶寬的需求，而無源光網(wǎng)絡(luò)(PON)這種點(diǎn)對(duì)多點(diǎn)的第二代<a class="contentlabel" href="http://cafeforensic.com/news/listbylabel/label/FTTH"><em>FTTH</em></a>(光纖到戶)技術(shù)，作為一種提供高速寬帶服務(wù)的優(yōu)秀替代產(chǎn)品，具有成本低、壽命長(zhǎng)、距離遠(yuǎn)等特點(diǎn)，因此受到業(yè)界的推崇。隨著國內(nèi)三大運(yùn)營商各自加速啟動(dòng)<a class="contentlabel" href="http://cafeforensic.com/news/listbylabel/label/3G"><em>3G</em></a>網(wǎng)絡(luò)建設(shè)和開始相關(guān)業(yè)務(wù)的運(yùn)營，光通信從去年以來在中國市場(chǎng)得到業(yè)界前所未有的關(guān)注，以PON形式建設(shè)的<a class="contentlabel" href="http://cafeforensic.com/news/listbylabel/label/FTTH"><em>FTTH</em></a>等光接入網(wǎng)絡(luò)也得到快速的啟動(dòng)。</p>本文引用地址：<a href="http://cafeforensic.com/article/96557.htm">http://cafeforensic.com/article/96557.htm</a> <p>　　中國市場(chǎng)目前主流采用的<a class="contentlabel" href="http://cafeforensic.com/news/listbylabel/label/EPON"><em>EPON</em></a>(以太網(wǎng)無源光網(wǎng)絡(luò))技術(shù)，是PON中兩大主要網(wǎng)絡(luò)建設(shè)方式之一。中國電信、中國聯(lián)通多次招標(biāo)，<a class="contentlabel" href="http://cafeforensic.com/news/listbylabel/label/EPON"><em>EPON</em></a>近兩年得到了快速發(fā)展。中國聯(lián)通最近又啟動(dòng)了全球規(guī)模最大的<a class="contentlabel" href="http://cafeforensic.com/news/listbylabel/label/EPON"><em>EPON</em></a>設(shè)備招標(biāo)，這標(biāo)志著EPON進(jìn)入了一個(gè)新的發(fā)展期。除了中國之外，國際上采用EPON的還有日本、韓國等，其中日本最早開始建設(shè)EPON網(wǎng)絡(luò)，并已經(jīng)開始基于它提供電視、語音、上網(wǎng)三重服務(wù)。而在美國、印度、歐洲等國家和地區(qū)另一種PON建設(shè)方式<a class="contentlabel" href="http://cafeforensic.com/news/listbylabel/label/GPON"><em>GPON</em></a>(吉比特?zé)o源光網(wǎng)絡(luò))則被作為主流。它與EPON不同，二者主要的區(qū)別在于，EPON基于以太網(wǎng)和IP協(xié)議，<a class="contentlabel" href="http://cafeforensic.com/news/listbylabel/label/GPON"><em>GPON</em></a>則可以支持ATM、TDM、SONET/SDH、以太網(wǎng)等多種協(xié)議，下行速率和分流比也不同。業(yè)界通常認(rèn)為，相比EPON控制器，由于更高的集成度，<a class="contentlabel" href="http://cafeforensic.com/news/listbylabel/label/GPON"><em>GPON</em></a>控制器在提高帶寬的同時(shí)能支持多種業(yè)務(wù)，但GPON的建設(shè)成本被認(rèn)為太高，而且以前被認(rèn)為技術(shù)不夠成熟。采用哪種PON一直是業(yè)內(nèi)爭(zhēng)論的焦點(diǎn)。</p> <p>　　近來，隨著國內(nèi)光接入網(wǎng)的大發(fā)展，GPON與EPON之爭(zhēng)又熱鬧起來，兩大陣營均據(jù)理力爭(zhēng)，隨著GPON日趨成熟，最近似乎GPON的呼聲逐漸高起來，關(guān)于GPON的成本是否過高的問題又被廠商拋出來爭(zhēng)論。支持者認(rèn)為GPON芯片的高集成度可不用外接其他芯片而同時(shí)支持多種業(yè)務(wù)，從長(zhǎng)期來看，成本并不高于EPON。但EPON支持者則普遍認(rèn)為GPON提供的功能，EPON也都可以提供，整體成本還是優(yōu)于GPON。而從運(yùn)營商來看，除了EPON之外，他們的GPON也都開始試點(diǎn)，中國電信、中國聯(lián)通、中國移動(dòng)都不例外。因此運(yùn)營商的態(tài)度似乎現(xiàn)在也不確定，這給PON市場(chǎng)發(fā)展帶來了變數(shù)。</p> <p>　　從PON芯片供應(yīng)商來看，GPON與EPON市場(chǎng)格局則有很大的不同，目前在中國EPON的主流供應(yīng)商只有三家，即PMC-Sierra、Teknovus和Cortina，這三家供應(yīng)商占了全部的市場(chǎng)。而GPON的芯片供應(yīng)商則有Broadlight、PMC-Sierra、Broadcom、Marvel、Cortina、Hisilicon、Infineon、Ikanos等多家，最近芯片巨頭博通宣布今年將向中國市場(chǎng)推出GPON芯片，支持GPON的發(fā)展。而據(jù)稱，設(shè)備企業(yè)自身也開始研發(fā)和使用自己的GPON芯片和方案，比如有的設(shè)備企業(yè)采用FPGA(可編程邏輯門陣列)技術(shù)在開發(fā)GPON方案。而這一趨勢(shì)是否將使GPON的成本更為降低，則需要觀察，不管怎樣，設(shè)備企業(yè)自身研發(fā)PON芯片對(duì)于芯片企業(yè)來說，將是一個(gè)新的挑戰(zhàn)。</p> <p>　　但EPON在中國有先入為主的優(yōu)勢(shì)，目前10GEPON在中國已經(jīng)開始大規(guī)模建設(shè)，從這點(diǎn)看，要領(lǐng)先于GPON的布局。GPON是否能大規(guī)模啟動(dòng)，就要看產(chǎn)業(yè)鏈的支持程度了。</p> <p>　　但GPON的興起，無疑將改變中國PON芯片的市場(chǎng)格局，將使中國PON芯片的供應(yīng)商從3家增加到10家甚至更多。</p> <p>　　中國的PON市場(chǎng)正在進(jìn)入一個(gè)新的關(guān)鍵時(shí)期，它的趨向?qū)㈥P(guān)系到相關(guān)芯片企業(yè)在中國市場(chǎng)的地位，如何在中國市場(chǎng)抓住新的機(jī)遇，將是他們必須認(rèn)真思考的問題。</p> <p>　　從另一個(gè)角度看，無論是GPON還是EPON芯片的供應(yīng)商，其中都沒有國內(nèi)企業(yè)，這不能不說是一個(gè)遺憾，除了很少的企業(yè)可以提供光收發(fā)芯片之外，國內(nèi)在光通信的PON核心芯片上幾乎是一片空白。而我國的通信市場(chǎng)將是世界上最大的市場(chǎng)之一，從加強(qiáng)核心技術(shù)這個(gè)角度來說，自主的光通信核心芯片值得期待。</p></span>  <div class="nvvt3dt" id="coverDiv" class="article_reg" style="width:100%;overflow:hidden;display:none;z-index:10;position:absolute;left:0;background:#fff;"> <center> <img src="https://webstorage.eepw.com.cn/images/display/reg.jpg" border="0" usemap="#Map" /> <map name="Map" id="Map"> <area shape="rect" coords="133,235,319,253" target="_blank" /> <area shape="rect" coords="132,315,319,335" /> </map> </center> </div>  <span id="rrjbdhj" class="hAd8"> <br></span>   </div> </article> <div id="ptddfjv" class="clear"></div> <br/> <div id="vbdltfb" class="hAd6"> <div class="ddbld3j" id="relA" style="width:auto;height:auto;"> <ul> <li>  <iframe id='af71d594' name='af71d594' src='https://ad.eepw.com.cn/www/delivery/afr.php?zoneid=114&cb=INSERT_RANDOM_NUMBER_HERE' 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href="http://cafeforensic.com/article/202108/427922.htm" target="_blank">西班牙電信宣布將提前關(guān)閉德國市場(chǎng)3G網(wǎng)絡(luò)</a> <div style="clear: both"></div> </div> <div id="jbtxxr3" class="yx"> <a class="fl" href="http://cafeforensic.com/info/industry/special/wireless" target="_blank"> 手機(jī)與無線通信 </a> <a class="zz" target="_blank" href="http://cafeforensic.com/news/listbylabel/label/西班牙電信">西班牙電信</a> <a class="zz" target="_blank" href="http://cafeforensic.com/news/listbylabel/label/3G">3G</a> <a class="zz" target="_blank" href="http://cafeforensic.com/news/listbylabel/label/德國">德國</a> <span id="fpjj3xz" class="zz">| 2021-08-31</span> <div style="clear: both"></div> </div> </div> <div style="clear: both"></div> </li> </ul> <ul class="xgwz"> <li id="nx3pp3b" class="dg1"> <div id="ltbvvxx" class="yb-1"> <div id="hfdndph" class="younr-1"> <a href="http://cafeforensic.com/article/202301/442290.htm" target="_blank">3G CDMA再見！美國運(yùn)營商關(guān)閉中國電信也快關(guān)閉了</a> <div style="clear: both"></div> 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target="_blank">中國移動(dòng)關(guān)閉3G是歷史發(fā)展的必然，助其5G取得競(jìng)爭(zhēng)優(yōu)勢(shì)</a> </div> <div id="f5xnnpb" class="yx"> <a class="fl" href="http://cafeforensic.com/info/industry/special/wireless" target="_blank"> 手機(jī)與無線通信 </a> <a class="zz" target="_blank" href="http://cafeforensic.com/news/listbylabel/label/中國移動(dòng)">中國移動(dòng)</a> <a class="zz" target="_blank" href="http://cafeforensic.com/news/listbylabel/label/3G">3G</a> <span id="f3t3vpn" class="zz">| 2019-03-19</span> <div style="clear: both"></div> </div> </div> <div style="clear: both"></div> </li> </ul> <ul class="xgwz"> <li id="xxdpnrb" class="dg1"> <a class="tp" href="http://cafeforensic.com/article/202007/416019.htm" target="_blank"><img src="http://p6-tt.byteimg.com/large/pgc-image/23d42c5a04ab4383a78701db02f19511?from=pc" alt="2G/3G退網(wǎng)正在進(jìn)行時(shí)：物聯(lián)網(wǎng)有足夠的承接力"/></p><p><strong>退網(wǎng)條件已成熟</strong></p><p>運(yùn)營商退網(wǎng)最大的挑戰(zhàn)，就是如何實(shí)現(xiàn)業(yè)務(wù)的遷移和承載。一個(gè)是公眾用戶業(yè)務(wù)，一個(gè)是物聯(lián)網(wǎng)業(yè)務(wù)。目前來看，這兩塊業(yè)務(wù)2G/3G扮演的角色越來越弱化，網(wǎng)絡(luò)承接能力越來越強(qiáng)。</p><p>一方面，三大運(yùn)營商均已全面商" alt="2G/3G退網(wǎng)正在進(jìn)行時(shí)：物聯(lián)網(wǎng)有足夠的承接力"></a> <div id="fflflh3" class="yb"> <div id="h5vz3dl" class="younr"> <a href="http://cafeforensic.com/article/202007/416019.htm" target="_blank">2G/3G退網(wǎng)正在進(jìn)行時(shí)：物聯(lián)網(wǎng)有足夠的承接力</a> </div> <div id="tth5jv3" class="yx"> <a class="fl" href="http://cafeforensic.com/info/industry/special/iot" target="_blank"> 物聯(lián)網(wǎng)與傳感器 </a> <a class="zz" target="_blank" href="http://cafeforensic.com/news/listbylabel/label/2G/3G">2G/3G</a> <a class="zz" target="_blank" href="http://cafeforensic.com/news/listbylabel/label/物聯(lián)網(wǎng)">物聯(lián)網(wǎng)</a> <span id="33vzj33" class="zz">| 2020-07-22</span> <div 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