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Communication system

  • US 20020032030A1
  • Filed: 08/24/2001
  • Published: 03/14/2002
  • Est. Priority Date: 08/28/2000
  • Status: Abandoned Application
First Claim
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1. Method in a radio communication system using a logical control channel for transmitting control signaling messages from a base station to a mobile station during an ongoing call, characterized in that the method comprises the steps of:

  • transmitting from the base station at least one control signaling message using a first modulation scheme, detecting that the mobile station has not properly received and understood said message, and re-transmitting said control signaling message using a second modulation scheme in response to said detecting step.

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