Abstract: Local Multipoint Distribution Service (LMDS) is a rising technology of fixed broadband wireless access. With great transmission capacity, it is cost-effective and has aroused much attention of telecom operators all over the world. This paper describes the background and current status of the LMDS technology first, then discusses its service types, operation frequency, system structure and standardization status. It also compares LMDS with other exsiting access systems such as cable TV system, ADSL and MMDS (Multichannel Multipoint Distribution Service). It concludes that solutions to poor signal quality, limited service scope and high operation cost of LMDS may promote its commerical application.
Key words:broadband wireless access; local multipoint distribution service; MMDS
7 参考文献
[1] Agne Nordbotten. LMDS Systems and Their Application[J]. IEEE Communications Magazine, 2000,38(12):150—154.
[2] David D. Falconer Jean-Paul DeCruyenaere. Coverage Enhancement Methods for LMDS[J]. IEEE Communications Magazine, 2003,41(7):86—92.
[3] Vinod Tipparaju. Local Multipoint Distribution Service (LMDS) [EB/OL]. http://www.cis.ohio-state.edu/~jain/cis788-99/ftp/lmds/index.html.
[4] Bossard B. Low Power Multi-Function Cellular Television System[P]. U.S:4747160, 1988.
[5] YD/T1186-2002. 接入网技术要求——26GHz本地多点分配系统(LMDS)[S]. 2002.
[6] Roger B Marks. The IEEE 802.16 Working Group on Broadband Wireless[EB/OL]. http://www.comsoc.org/livepubs/ni/public/1999/mar/ni802.html.