固定式宽带无线接入技术——LMDS

A Fixed Broadband Wireless Access Technology: LMDS

本地多点分配业务(LMDS)是近年来在国际上兴起的固定式宽带无线接入技术,具有传输容量大、起始费用低的优点,受到了国内外电信业务经营者的普遍关注。文章介绍了LMDS提供的业务类型、工作频率、系统结构和标准化情况,并将LMDS与有线电视网络、ADSL、MMDS等现有的接入技术进行了比较。文章认为LMDS的商业推广尚需解决信号质量、服务区尺寸、费用等制约因素。

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.