臺大電機學院電信工程研究所(編輯修改稿)
2025-02-11 09:06 本頁面
【文章內(nèi)容簡介】 less 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)臺大電機學院電信工程研究所 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臺大電機學院電信工程研究所 我國未來主要頻譜需求? 點對多點傳輸? 衛(wèi)星頻譜需求? 無線區(qū)域迴路? 智慧型運輸系統(tǒng)? 3G Mobile Services臺大電機學院電信工程研究所 我國未來主要頻譜需求?點對多點傳輸 （ PointtoMultipoint Access） ? 主要產(chǎn)品： LMDS(Local Multiple Distributed Service)?美國、加拿大、韓國等國家已完成點對多點傳輸頻段規(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，若目前並無其他業(yè)務(wù)使用亦可供 LMDS業(yè)務(wù)申請臺大電機學院電信工程研究所 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臺大電機學院電信工程研究所 我國未來主要頻譜需求 (續(xù) )? 目前及未來 2GHz以上衛(wèi)星頻譜需求集中於C band ( 4/6GHz, 750MHz)Ku band (11/14GHz,
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