毫无疑问,无线局域环(WLL)是当今全球通信领域中发展最火爆的一个新市场。国际电联在日内瓦召开的’95电信会议上,约有30家公司向与会者展示了建立无线局域环的解决办法。这一技术问世不久便使传统的市话交换公司面临新的竞争,并被看作是发展中国家解决通信基础设施建设的最佳办法。 何谓无线局域环 所谓无线局域环(WLL)是一种用户家庭与办公室通信网络,它是通过电缆将基站与中央局或交换机连接起来,使用户家庭与办公室实现无线通信(见图)。无线局域环一般被看作是以无线方式提供电话的“最后一英里”。根据应用业务和 Undoubtedly, Wireless Local Area Ring (WLL) is one of the hottest new markets in the world of communications today. At the ’95 teleconference held by ITU in Geneva, about 30 companies demonstrated to participants the solution to the establishment of WLANs. Soon after this technology was introduced, the traditional local exchange company faced new competition and was seen as the best way for developing countries to address their communications infrastructure. What is Wireless Local Area Ring? The so-called Wireless Local Area Ring (WLL) is a subscriber’s home and office communications network that connects a base station to a central office or switch via cable to enable wireless communication between the user’s home and the office (see figure). Wireless local area rings are generally seen as the “last mile” of providing phones wirelessly. Depending on the application business and