Method for reporting channel state information, user equipment, and base station
First Claim
1. A method for reporting channel state information, comprising:
- receiving, by a user equipment (UE), an aperiodic channel state information (CSI) trigger signaling in a subframe n, wherein n is an integer;
determining, by the UE, a CSI measurement resource associated with the aperiodic CSI trigger signaling present in the subframe n, wherein the CSI measurement resource is at least one of a channel state information reference signal (CSI-RS) resource and an interference measurement resource (IMR), wherein the CSI-RS resource is a resource transmitting a non-zero power CSI-RS, and the IMR is a resource carrying a zero power CSI-RS; and
reporting, by the UE, an aperiodic CSI according to the aperiodic CSI trigger signaling, wherein the reported aperiodic CSI is derived based on the determined CSI measurement resource.
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Abstract
The present disclosure relates to a method for reporting channel state information, a user equipment, and a base station. A channel state information measurement resource is determined by a UE according to an aperiodic CSI trigger signaling, so that a base station transmits a CSI-RS only when the UE needs to report the aperiodic CSI. Compared with transmitting a periodic CSI-RS by an existing base station, unnecessary transmitting of the CSI-RS is reduced, and energy of the base station such as an eNB is saved; and reducing the CSI-RS transmission may reduce resources occupied by the CSI-RS, thereby improving the spectrum efficiency of the system. In addition, reducing unnecessary CSI-RS transmission allows the interference in other cells by the base station being reduced; finally, CSI measurement resources are reserved only when the CSI needs to be fed back, the cost occupied by the CSI measurement resources is reduced.
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Citations
23 Claims
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1. A method for reporting channel state information, comprising:
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receiving, by a user equipment (UE), an aperiodic channel state information (CSI) trigger signaling in a subframe n, wherein n is an integer; determining, by the UE, a CSI measurement resource associated with the aperiodic CSI trigger signaling present in the subframe n, wherein the CSI measurement resource is at least one of a channel state information reference signal (CSI-RS) resource and an interference measurement resource (IMR), wherein the CSI-RS resource is a resource transmitting a non-zero power CSI-RS, and the IMR is a resource carrying a zero power CSI-RS; and reporting, by the UE, an aperiodic CSI according to the aperiodic CSI trigger signaling, wherein the reported aperiodic CSI is derived based on the determined CSI measurement resource. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for reporting channel state information, comprising:
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transmitting, by a base station, an aperiodic channel state information (CSI) trigger signaling in a subframe n, wherein the n is an integer; determining, by the base station, a CSI measurement resource associated with the aperiodic CSI trigger signaling present in the subframe n, wherein the CSI measurement resource is at least one of a channel state information reference signal (CSI-RS) resource and an interference measurement resource (IMR), wherein the CSI-RS resource is a resource transmitting a non-zero power CSI-RS, and the IMR is a resource carrying a zero power CSI-RS; and performing, by the base station, information transmission according to the determined CSI measurement resource. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A user equipment, comprising:
- a receiver, a processor and a transmitter, wherein the receiver is configured to receive an aperiodic channel state information (CSI) trigger signaling in a subframe n, wherein the n is an integer;
wherein the processor is configured to determine a CSI measurement resource associated with the aperiodic CSI trigger signaling present in the subframe n, wherein the CSI measurement resource is at least one of a channel state information reference signal (CSI-RS) resource and an interference measurement resource (IMR), wherein the CSI-RS resource is a resource transmitting a non-zero power CSI-RS, and the IMR is a resource carrying a zero power CSI-RS;
wherein the transmitter is configured to report an aperiodic CSI according to the aperiodic CSI trigger signaling, wherein the reported aperiodic CSI is derived by the processor based on the determined CSI measurement resource. - View Dependent Claims (18, 19, 20, 21, 22, 23)
- a receiver, a processor and a transmitter, wherein the receiver is configured to receive an aperiodic channel state information (CSI) trigger signaling in a subframe n, wherein the n is an integer;
Specification