Information services may be provided to a user of a personal digital assistant (PDA) via an infra red wireless communication port. The PDA recruits communication with a peer, such as a beacon, via this link, and the PDA and peer exchange messages containing the URLs of their proxies within the Internet....http://www.google.com.tw/patents/US20020138652?utm_source=gb-gplus-share專利 US20020138652 - Provision of services via an information technology network
