Method of operating a communication system, a radio station, and a radio communication system
AssigneeKoninklijke Philips Electronics N.V.
InventorsTimothy J. Moulsley, Matthew P. J. Baker
Life of this patent
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Abstract
A radio communication system has a plurality of transmission formats available for the transmission of data signals by a sending station, and a pilot signal is transmitted to enable channel estimation by the receiving station. A receiving station transmits a control signal indicating the transmission formats that the sending station may use for transmitting the data signals. The sending station selects one of the indicated transmission formats for transmitting a data signal and derives a transmission power level for the pilot signal from the control signal. The transmission power level of the pilot signal may be independent of the selected transmission format, or may depend on selected transmission format.
Claims30
A method of operating a radio station, comprising:
- receiving a control signal indicative of at least one transmission format,
- in response to receiving the control signal, transmitting a data signal in at least a selected one of the indicated transmission formats,
- transmitting a pilot signal associated with predetermined pilot parameters for channel estimation at predetermined time offsets, the predetermined pilot parameters being compared to target values for generating transmit power control commands, and
- deriving the transmit power level of the pilot signal from the control signal;
- wherein transmission of the data signal is discontinuous and wherein the transmit power level of the pilot signal is decreased during at least some of the time while transmission of the data signal is discontinued.
A radio station for transmitting a data signal, comprising:
- means for receiving a control signal indicative of at least one transmission format;
- means for transmitting a data signal in at least one of the indicated transmission formats;
- means for transmitting a pilot signal associated with predetermined pilot parameters for channel estimation at predetermined time offsets, the predetermined pilot parameters being compared to target values for generating transmit power control commands, and
- means for deriving the transmit power level of the pilot signal from the control signal;
- wherein transmission of the data signal is discontinuous and wherein the transmit power level of the pilot signal is decreased during at least some of the time while transmission of the data signal is discontinued.
A radio station for receiving a data signal comprising:
- means for transmitting a control signal indicative of at least one transmission format;
- means for receiving a data signal transmitted using at least one of the indicated transmission formats;
- means for receiving a pilot signal transmitted during transmission of the data signal, the pilot signal associated with predetermined pilot parameters for channel estimation at predetermined time offsets, the predetermined pilot parameters being compared to target values for generating transmit power control commands;
- means for transmitting the transmit power control commands;
- and
- means for adjusting the target value during reception of the data signal by an amount dependent on the indicated at least one transmission format;
- wherein transmission of the data signal is discontinuous and wherein the transmit power level of the pilot signal is decreased during at least some of the time while transmission of the data signal is discontinued.
A method of operating a radio communication system comprising a first station and a second station, the method comprising, at the second station:
- transmitting to the first station a control signal indicative of at least one transmission format, and at the first station,
- in response to receiving the control signal,
- transmitting a data signal in at least a selected one of the indicated transmission formats,
- transmitting a pilot signal associated with predetermined pilot parameters for channel estimation at predetermined time offsets, the predetermined pilot parameters being compared to target values for generating transmit power control commands, and
- deriving the transmit power level of the pilot signal from the control signal;
- wherein transmission of the data signal is discontinuous and wherein the transmit power level of the pilot signal is decreased during at least some of the time while transmission of the data signal is discontinued.
A method of operating a radio station, comprising:
- transmitting a control signal indicative of at least one transmission format;
- receiving a data signal transmitted using at least one of the indicated transmission formats;
- receiving a pilot signal transmitted during transmission of the data signal, the pilot signal associated with predetermined pilot parameters for channel estimation at predetermined time offsets, the predetermined pilot parameters being compared to target values for generating transmit power control commands;
- transmitting the transmit power control commands;
- and
- adjusting the target value during reception of the data signal by an amount dependent on the indicated at least one transmission format;
- wherein transmission of the data signal is discontinuous and wherein the transmit power level of the pilot signal is decreased during at least some of the time while transmission of the data signal is discontinued.
Dependencies are inferred from the claim text.