Method and apparatus for channel measurements for coordinated multipoint transmission
AssigneeHuawei Technologies Co., Ltd.
InventorDavid MAZZARESE
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Abstract
The present invention relates to a method for configuring reference signals and measurement sets to support coordinated multipoint transmission with distributed antennas. A first set of reference signal patterns is used for measuring and reporting received signal power from different transmission points, and a second set of reference signal patterns is used for measuring and reporting channel state information from different transmission points. The method allows to minimize power consumption and feedback overhead, while still being flexible in the configuration and re-configuration of the measurement sets.
Claims21
A method for channel measurements for coordinated multipoint transmission in a wireless communication system, comprising:
- obtaining, by a receiver, a first set of channel state information reference signals (CSI-RS) and a second set of CSI-RS from a transmitter;
- deriving, by the receiver, at least one value of channel state information (CSI) based on the first set of CSI-RS;
- deriving, by the receiver, at least one value of CSI reference signal received power (CSI-RSRP) based on the second set of CSI-RS;
- and
- sending, by the receiver, the at least one value of CSI and the at least one value of CSI-RSRP to the transmitter.
A method for channel measurements for coordinated multipoint transmission in a wireless communication system, comprising:
- sending, by a transmitter, a first set of channel state information reference signals (CSI-RS) according to a first set of CSI-RS patterns and a second set of CSI-RS according to a second set of CSI-RS patterns, to a receiver;
- receiving, by the transmitter, at least one value of channel state information (CSI) derived by the receiver based on the first set of CSI-RS;
- receiving, by the transmitter, at least one value of CSI reference signal received power (CSI-RSRP) derived by the receiver based on the second set of CSI-RS;
- determining, by the transmitter, based on the at least one value of CSI, a precoder for precoding data;
- and
- configuring, by the transmitter, the first set of CSI-RS patterns based on the at least one value of CSI-RSRP.
A receiver for channel measurements for coordinated multipoint transmission in a wireless communication system, comprising:
- a processor module, configured to:
- obtain a first set of channel state information reference signals (CSI-RS) and a second set of CSI-RS from a transmitter;
- derive at least one value of channel state information (CSI) based on the first set of CSI-RS;
- derive at least one value of CSI reference signal received power (CSI-RSRP) based on the second set of CSI-RS;
- and
- send the at least one value of CSI and the at least one value of CSI-RSRP to the transmitter.
A transmitter for channel measurements for coordinated multipoint transmission in a wireless communication system, comprising:
- a processor module, configured to:
- send a first set of channel state information reference signals (CSI-RS) according to a first set of CSI-RS patterns and a second set of CSI-RS according to a second set of CSI-RS patterns, to a receiver;
- receive at least one value of channel state information (CSI) derived by the receiver based on the first set of CSI-RS;
- receive at least one value of CSI reference signal received power (CSI-RSRP) derived by the receiver based on the second set of CSI-RS;
- determine a precoder for precoding data based on the at least one value of CSI;
- and
- configure the first set of CSI-RS patterns based on the at least one value of CSI-RSRP or the at least one value of RSS.
Dependencies are inferred from the claim text.