Patent ID: 7136915

Claim:
A method of communicating postings to a target user community, comprising: (a) storing a plurality of postings, each posting including a source identification tag, an information body, and a broadcast descriptor, the broadcast descriptor identifying a geographical region of said each posting, wherein the geographical region is defined by a closed region on a map; (b) receiving a plurality of requests from mobile and stationary users, each request from a user including a user identification tag and an antenna descriptor, the antenna descriptor identifying a geographical location of the user; (c) processing said each request, including: (1) identifying one or more postings having geographical regions that contain the geographical location, and (2) sending the identified one or more postings to the user; (d) processing a subsequent request from the user, the subsequent request including a user identification tag and an antenna descriptor specifying a subsequent geographical location of the user, said processing a subsequent request from the user including: (1) sending to the user other postings having geographical regions that contain the subsequent geographical location, wherein the other postings do not include any posting previously sent to the user.