Outer loop power control of user equipment in wireless communication
First Claim
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1. A method, comprising:
- a step in which a service access point (SAP) of a radio access network (RAN) receives a target value for a block error rate (BLER) or other indicator of channel quality, and determines a new signal-to-interference ratio (SIR) target corresponding to the indicator of channel quality by comparing the target 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.
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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 to use as a guide for determining, by itself, an appropriate SIR target.
38 Citations
10 Claims
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1. A method, comprising:
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a step in which a service access point (SAP) of a radio access network (RAN) receives a target value for a block error rate (BLER) or other indicator of channel quality, and determines a new signal-to-interference ratio (SIR) target corresponding to the indicator of channel quality by comparing the target 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. - View Dependent Claims (2, 3)
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4. A method as in claim 11 wherein the RAN includes a radio network controller (RNC) for connecting the SAP to a core network of a telecommunication system, and the RNC provides the target indicator of channel quality.
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5. 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:
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a step in which a service access point (SAP) of a radio access network (RAN) receives a target value for a block error rate (BLER) or other indicator of channel quality, and determines a new signal-to-interference ratio (SIR) target corresponding to the indicator of channel quality by comparing the target 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. - View Dependent Claims (6)
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7. A service access point (SAP) of a radio access network (RAN), comprising:
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means by which the SAP receives a target value for a block error rate (BLER) or other indicator of channel quality, and determines a new signal-to-interference ratio (SIR) target corresponding to the indicator of channel quality by comparing the target 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. - View Dependent Claims (8, 9)
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10. A system, comprising:
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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 receives the target value for the BLER or other indicator of channel quality, and determines a signal-to-interference ratio (SIR) target corresponding to the target indicator of channel quality by comparing the target 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 control commands to the UE device by comparing the measured SIR value to the SIR target.
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Specification