Source: http://www.google.com/patents/US6388615?dq=6680675
Timestamp: 2014-03-13 22:43:11
Document Index: 707340151

Matched Legal Cases: ['application No. 09', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09']

Patent US6388615 - Micro cell architecture for mobile user tracking communication system - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA system and method for tracking a user. The system is adapted for use in a wireless communication system and creates a plurality of beams within a coverage area. A first beam is directed at a user in a first microcell and a number of additional beams illuminate microcells immediately adjacent the first...http://www.google.com/patents/US6388615?utm_source=gb-gplus-sharePatent US6388615 - Micro cell architecture for mobile user tracking communication systemAdvanced Patent SearchPublication numberUS6388615 B1Publication typeGrantApplication numberUS 09/587,758Publication dateMay 14, 2002Filing dateJun 6, 2000Priority dateJun 6, 2000Fee statusPaidAlso published asDE60114360D1, DE60114360T2, EP1230748A2, EP1230748B1, US6914557, US20020126042, WO2001095520A2, WO2001095520A3Publication number09587758, 587758, US 6388615 B1, US 6388615B1, US-B1-6388615, US6388615 B1, US6388615B1InventorsDonald C. D. Chang, Ying Feria, Weizheng Wang, Alan Cha, Ming Chang, Frank A. Hagen, Kar W. YungOriginal AssigneeHughes Electronics CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (9), Non-Patent Citations (13), Referenced by (25), Classifications (10), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetMicro cell architecture for mobile user tracking communication systemUS 6388615 B1Abstract A system and method for tracking a user. The system is adapted for use in a wireless communication system and creates a plurality of beams within a coverage area. A first beam is directed at a user in a first microcell and a number of additional beams illuminate microcells immediately adjacent the first microcell. The system is equipped with a mechanism for detecting movement of the user from the first microcell to one of the immediately adjacent microcells. On the detection of movement of the user, the system redirects the first beam from the first microcell to a second microcell, the second microcell being one of the adjacent microcells. In the illustrative embodiment, the system is implemented in a stratospheric platform based communication system including a hub adapted to communicate with a stratospheric platform. A transceiver and a phased array antenna are disposed on the platform to communicate with the hub and with the user. A second antenna is provided on the platform to communicate with the hub. Beamforming and direction are implemented on the hub and communicated to the platform. The user's position is detected with a global positioning system receiver, by measuring the strength of a signal received from the user, or by other suitable means. On detection of user movement from the first microcell, the beamforming system redirects the beam to follow the user into a second microcell. Additional beams around the user's microcell are illuminated to facilitate detection of the users movement.
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