臺(tái)大電機(jī)學(xué)院電信工程研究所(文件)
【正文】 reless Broad Band Access? Broadband wireless access works– Microwave link: ? existing technology, ? PointtoPoint, ? short range, ? date rate at T1() ~ STM1(150Mbps) and above– Satellite: ? emerging technolgoy, ? PointtoPoint or PointtoMultipoint, ? very large range, ? data rate at 400kbps (direct PC) ~ 10s Mbps (VSAT and Hub)臺(tái)大電機(jī)學(xué)院電信工程研究所 Wireless Broad Band Access(Con’t)– MMDS(Microwave MultiPoint Distribution Service):? existing/emerging technology, used for Video Distribution? PointtoMultipoint, ? medium range (up to 50km)? data rate at ~10sMbps, ? operating at about 2G10GHz– LMDS(Local MultiPoint Distribution Service):? emerging technology? PointtoMultipoint (PointtoPoint mode allowed) ? short range (2 6 km, depending on modulations) ? data rate at ~ 150Mbps ? operating at 24G32 GHz and above臺(tái)大電機(jī)學(xué)院電信工程研究所 我國(guó)未來(lái)主要頻譜需求? 點(diǎn)對(duì)多點(diǎn)傳輸? 衛(wèi)星頻譜需求? 無(wú)線區(qū)域迴路? 智慧型運(yùn)輸系統(tǒng)? 3G Mobile Services臺(tái)大電機(jī)學(xué)院電信工程研究所 我國(guó)未來(lái)主要頻譜需求?點(diǎn)對(duì)多點(diǎn)傳輸 （ PointtoMultipoint Access） ? 主要產(chǎn)品： LMDS(Local Multiple Distributed Service)?美國(guó)、加拿大、韓國(guó)等國(guó)家已完成點(diǎn)對(duì)多點(diǎn)傳輸頻段規(guī)劃 ?電信總局已釋出頻段予固網(wǎng)業(yè)者 :?EBT, TFN, NCIC, CHT(Trial) ?上列頻段以外， 24GHz以上之頻譜，除部分衛(wèi)星使用頻段及微波鏈 路外，若目前並無(wú)其他業(yè)務(wù)使用亦可供 LMDS業(yè)務(wù)申請(qǐng)臺(tái)大電機(jī)學(xué)院電信工程研究所 MMDS/LMDS Services? Protocol Stack alternatives: –Voice/Data over TDM over MMDS/LMDS– Voice/Data over ATM over MMDS/LMDS– Voice/Data over IP over MMDS/LMDS ? Access approach:–Traditional Telephone /PBX –ATM switch and routers–IP telephone / IP telephony gateway/ IP PBX臺(tái)大電機(jī)學(xué)院電信工程研究所 我國(guó)未來(lái)主要頻譜需求 (續(xù) )? 目前及未來(lái) 2GHz以上衛(wèi)星頻譜需求集中於C band ( 4/6GHz, 750MHz)Ku band (11/14GH
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