Communication system
First Claim
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.
1 Assignment
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Accused Products
Abstract
Method in a communication system using a logical control channel transmitting a control channel message, including handover information, between a mobile station 10 and a base station 26, in said system, using a first control channel modulation scheme. The method comprises the step of re-transmitting the control channel message using a second control channel modulation scheme, if the control channel message using the first control channel modulation scheme is not received or understood by the mobile station. According to a preferred embodiment the control channel is a Fast Associated Control Channel (FACCH).
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Citations
24 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15)
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- 13. Radio communication system comprising base stations (26), mobile stations (10) and a control unit (27) controlling at least one of said base stations, wherein the control unit controls the base station to transmit at least one control signaling message to a mobile station during an ongoing call using a logical control channel, characterized in that the control unit further controls the base station to re-transmit said at least one control signaling message using a second modulation scheme in response to detecting that the mobile station has not properly received and understood said message as transmitted using said first modulation scheme.
Specification