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Time divisional duplex (TDD) system portable telephone relay device

  • US 6,342,777 B1
  • Filed: 03/03/1998
  • Issued: 01/29/2002
  • Est. Priority Date: 03/04/1997
  • Status: Expired due to Fees
First Claim
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1. A time division duplex (TDD) portable communicator relay device for relaying a communication line between a base station within one zone in a TDD system portable communicator service area including a plurality of zones and a portable communicator terminal which is within an electrical wave insensitive region in the zone, said device comprising:

  • a first relay unit for relaying a communication line between said base station and the portable communicator terminal within the electrical wave insensitive region in the zone of said base station, using a zone frequency channel of said base station; and

    a second relay unit, connected to said base station through an exclusive wire communication line, for conducting transmission/reception with respect to said base station through said exclusive wire communication line, and for conducting transmission/reception with respect to said portable communicator terminal within said electrical wave insensitive region using a predetermined frequency channel of a plurality of predetermined frequency channels which is not assigned to said zone, wherein a relay between said base station and said portable, communicator terminal is conducted based on a control signal from said base station using any of said first relay unit and said second relay unit.

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