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TRANSMITTER APPARATUS, MOBILE COMMUNICATION SYSTEM, BASE STATION AND COMMUNICATION ENABLE SIGNAL TRANSMITTER APPARATUS

  • US 20080207239A1
  • Filed: 02/27/2008
  • Published: 08/28/2008
  • Est. Priority Date: 02/28/2007
  • Status: Active Grant
First Claim
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1. A transmitter apparatus used in a non-priority communication system that uses a second frequency band adjacent to a first frequency band utilized in a priority communication system, comprising:

  • a signal transmitter unit configured to be enabled to transmit, to a receiver apparatus used in the non-priority communication system, a signal by using a frequency channel of the second frequency band, when the signal transmitter unit receives a communication enable signal transmitted from the priority communication system or when the transmitter apparatus detects that the receiver apparatus has received the communication enable signal.

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