Outer loop power control of user equipment in wireless communication
OwnerJian Gu, Vinh Phan +2inventors
InventorsJian Gu, Vinh Phan, Ramin Baghaie, Karri Ranta-Aho
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Abstract
A faster power control method especially of use in case of a UE device communicating with a SAP (e.g. a Node B) of a UTRAN via E-DCH, where instead of the SAP (e.g. a Node B) receiving from the serving RNC a new SIR target to use because of changing channel conditions in what is called outer loop power control, the SAP instead receives a BLER target or a target value for some other indicator of channel quality (such as a new-data indicator value of EUPA) to use as a guide for determining, by itself, an appropriate SIR target.
Claims18
A method, comprising:
- a step in which a service access point (SAP) of a radio access network (RAN) determines a new signal-to-interference ratio (SIR) target corresponding to an indicator of channel quality by comparing a target value for the indicator of channel quality with a measured value for the indicator of channel quality;
- and
- a step in which the SAP uses the SIR target to provide power control commands to a user equipment device providing an uplink signal.
A computer program product comprising a computer readable storage structure embodying computer program instructions thereon, by which a computer processor is enabled to perform the steps of a method including:
- a step in which a service access point (SAP) of a radio access network (RAN) determines a new signal-to-interference ratio (SIR) target corresponding to an indicator of channel quality by comparing a target value for the indicator of channel quality with a measured value for the indicator of channel quality;
- and
- a step in which the SAP uses the SIR target to provide power control commands to a user equipment device providing an uplink signal.
A service access point (SAP) of a radio access network (RAN), comprising:
- means by which the SAP determines a new signal-to-interference ratio (SIR) target corresponding to an indicator of channel quality by comparing a target value for the indicator of channel quality with a measured value for the indicator of channel quality;
- and
- means by which the SAP uses the SIR target to provide power control commands to a user equipment device providing an uplink signal.
A system, comprising:
- a user equipment (UE) device, for providing an unlink signal, and responsive to a power control command;
- and
- a radio access network (RAN), for coupling the user equipment device to a core network, the RAN including:
- a service access point (SAP), responsive to the uplink signal, for providing the power control command;
- and
- a radio network controller, for providing a block error rate (BLER) target or other indicator of channel quality;
- wherein the SAP comprises:
- means by which the SAP determines a signal-to-interference ratio (SIR) target corresponding to an indicator of channel quality by comparing a target value for the indicator of channel quality with a measured value for the indicator of channel quality;
- and
- means by which the SAP obtains a measured SIR value for the uplink signal and uses the SIR target to provide power is control commands to the UE device by comparing the measured SIR value to the SIR target.
Dependencies are inferred from the claim text.