Rate control for multi-channel communication systems
AssigneeQUALCOMM Incorporated
InventorsHao Xu, Byoung-Hoon Kim, Durga Prasad Malladi
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Abstract
Various methods and systems for determining reverse-link data rates in a multi-user communication system are disclosed. For example, an apparatus for controlling a data rate of at least a first UE in a multi-user communication system is disclosed. The apparatus may include a channel estimation device configured to determine channel estimates for a plurality of different reverse-link signals to produce a plurality of channel estimates, a demodulation device configured to determine a first signal-to-noise (SNR) ratio for the first UE using the plurality of different channels estimates, and a data rate determining device configured to determine a first reverse-link data rate for the first UE using the first SNR.
Claims38
An apparatus for controlling a data rate of at least a first User Equipment (UE) in a multi-user communication system, the apparatus comprising:
- a channel estimation device configured to determine channel estimates for a plurality of different reverse-link signals to produce a plurality of channel estimates;
- a demodulation device configured to determine a first signal-to-noise ratio (SNR) for the first UE using the plurality of channel estimates, and
- a data rate determining device configured to determine a first reverse-link data rate for the first UE using the first SNR based on a traffic channel power spectral density (PSD) to pilot power ratio (ΔP/P0) of each reverse link channel, wherein the ΔP is based on a power amplifier headroom or a path differential between a serving cell and other cells.
An apparatus for controlling a data rate of at least a first User Equipment (UE) in a multi-user communication system, the apparatus comprising:
- a processing circuit coupled to a memory, wherein the processing circuit is configured to:
- determine a channel estimate for a plurality of different reverse-link signals to produce a plurality of channel estimates;
- determine a first signal-to-noise ratio (SNR) for the first UE using the plurality of channel estimates, and
- determine a first reverse-link data rate using the first SNR based on a traffic channel power spectral density (PSD) to pilot power ratio (ΔP/P0) of each reverse link channel, wherein the ΔP is based on a power amplifier headroom or a path differential between a serving cell and other cells.
An apparatus for controlling a data rate of at least a first UE in a multi-user communication system, the apparatus comprising:
- a channel estimation means for determining a channel estimate for a plurality of different reverse-link signals to produce a plurality of channel estimates;
- a demodulation means for determining a first signal-to-noise ratio (SNR) for the first UE using the plurality of channel estimates;
- and
- a determining means for determining a first reverse-link data rate using the first SNR based on a traffic channel power spectral density (PSD) to pilot power ratio (ΔP/P0) of each reverse link channel, wherein the ΔP is based on a power amplifier headroom or a path differential between a serving cell and other cells.
A method for controlling a data rate of at least a first UE in a multi-user communication system, the method comprising:
- determining a channel estimate for a plurality of different reverse-link signals to produce a plurality of channel estimates;
- determining a first signal-to-noise ratio (SNR) for the first UE using the plurality of channel estimates;
- and
- determining a first reverse-link data rate using the first SNR based on a traffic channel power spectral density (PSD) to pilot power ratio (ΔP/P0) of each reverse link channel, wherein the ΔP is based on a power amplifier headroom or a path differential between a serving cell and other cells.
A computer-readable memory device containing a plurality of computer-based instructions, the computer-based memory comprising:
- first code for determining a channel estimate for a plurality of different reverse-link signals to produce a plurality of channel estimates;
- second code for determining a first signal-to-noise ratio (SNR) for the first UE using the plurality of channel estimates;
- and
- third code for determining a first reverse-link data rate using the first SNR based on a traffic channel power spectral density (PSD) to pilot power ratio (ΔP/P0) of each reverse link channel, wherein the ΔP is based on a power amplifier headroom or a path differential between a serving cell and other cells.
An apparatus for scheduling data rates for a plurality of UEs, comprising:
- means for power controlling respective reference signals from the UEs;
- and
- means for determining a reverse-link data rate for the respective UEs using a signal-to-noise ratio (SNR) based on a traffic channel power spectral density (PSD) to pilot power ratio (ΔP/P0) of each reverse link channel, wherein the ΔP is based on a power amplifier headroom or a path differential between a serving cell and other cells.
Dependencies are inferred from the claim text.