Back to results
US 7,606,589 B2Granted
Radio communication system
AssigneeKoninklijke Philips Electronics N.V.
InventorsTimothy J. Moulsley, Bernard Hunt, Matthew P. J. Baker
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeKoninklijke Philips Electronics N.V.
InventorsTimothy J. Moulsley, Bernard Hunt, Matthew P. J. Baker
Estimating the term…
In a radio communication system having a primary station and a plurality of secondary stations, the power of uplink and downlink channels between the primary station and a secondary station is controlled in a closed loop manner by each station transmitting power control commands to the other station. In response to these commands the receiving station adjusts its output power in steps. By combining a plurality of received power control commands before adjusting its output power the receiving station may emulate the ability to use a smaller power control step size than its minimum, thereby improving performance under certain channel conditions. In one embodiment when the required power control step size is less than the minimum step size of a particular station, that station processes a group of power control commands to determine whether to adjust its output power by its minimum step size. In an alternative embodiment the power control step size is fixed when the combining algorithm is used. The invention is applicable to power control in both primary and secondary stations.
A radio communication system comprising a primary station and a plurality of secondary stations, the system having a communication channel between the primary station and a secondary station, one of the primary and secondary stations having means for transmitting power control commands to the other station to instruct it to adjust its output transmission power in steps, wherein the receiving station has combining means for processing a plurality of power control commands to determine whether to adjust its output power as a function of a requested step size included in the power control commands and a minimum step size implemented by the other station, wherein at least one of the plurality of secondary stations includes means for selecting one of a plurality of available power control step sizes in response to commands issued by the primary station, and wherein the combining means are operative when the requested step size is less than the minimum available step size.
A primary station for use in a radio communication system having a communication channel between the primary station and a secondary station, the primary station having means for adjusting its output transmission power in steps in response to power control commands transmitted by the secondary station, wherein combining means are provided for processing a plurality of power control commands to determine whether to adjust its output power as a function of a requested step size included in the power control commands and a minimum step size implemented by the primary station, wherein the secondary station includes means for selecting one of a plurality of available power control step sizes in response to commands issued by the primary station, and wherein the combining means are operative when the requested step size is less than the minimum available step size.
A secondary station for use in a radio communication system having a communication channel between the secondary station and a primary station, the secondary station having means for adjusting its transmission power in steps in response to power control commands transmitted by the primary station, wherein combining means are provided for processing a plurality of power control commands to determine whether to adjust its output power as a function of a requested step size included in the power control commands and a minimum available step size implemented by the secondary station, wherein the secondary station further having means for selecting one of a plurality of available power control step sizes in response to commands issued by the primary station, and wherein the combining means are operative when the requested step size is less than the minimum available step size.
A method of operating a radio communication system comprising a primary station and a plurality of secondary stations, the system having a communication channel between the primary station and a secondary station, the method comprising the acts of:
Dependencies are inferred from the claim text.