| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a distributed infrastructure for wireless data communications. <P>SOLUTION: A mobile user terminal 402 accesses a packet data network 450 through one or more points of a plurality of network access points (404-412). One or more control points (432-440) determine which access point or multiple points the user terminal is to access. Control may be retained in the current control point, or transferred to another control point, whenever it is convenient. There are a plurality of routers, each having an associated home agent (418-420) which determines which foreign agents need to be accessed on behalf of each user terminal. The foreign agents (422-430) forward packets received from a user terminal's home agent to the control point currently controlling communications with the user terminal. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
