Method and apparatus for providing duplex communication service in geographical areas where conventional services are obstructed

US5812086A · kind A · utility

Assignee

• Motorola, Inc. · US

Inventors

• Bary R. Bertiger · Scottsdale, US
• David W. Corman · Gilbert, US
• Dean Lawrence Cook · Mesa, US
• Kristine P. Maine · Phoenix, US
• Keith Warble · Chandler, US

Key dates

• Filing date: Jun 27, 1996
• Grant date: Sep 22, 1998
• Expiry date: Jun 27, 2016

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S19/11
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A system (10) and method delivers geolocation or other signals (26, 28) to a communication unit (24) located within an area (20) (e.g., a building) where an obstruction exists between the signal transmitter (12, 18) and the communication unit (24). The system (10) uses an infrastructure transceiver apparatus (14, 16, 22) to receive (204, 304, 604) the signals (26, 28) and retransmit (208, 310, 610) them within the area (20). A communication unit (24) calculates responsive data, such as its approximate position, from the retransmitted signals and reports (406, 704) the responsive data to a host system via the infrastructure transceiver apparatus (14, 16, 22).