CQI measurement method, apparatus, and wireless communications system

User Equipment (UE), comprising:

• a transceiver;
• a processor;
• and a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions to cause:
• the transceiver to receive resource indication information from a base station, wherein the resource indication information is used to indicate a downlink channel quality indicator (CQI) measurement resource, the downlink CQI measurement resource comprises a frequency domain resource, and a bandwidth of the frequency domain resource is less than a system bandwidth, wherein the downlink CQI measurement resource is specified by the base station based on an uplink resource allocated to an another UE by the base station;
• and
• the processor to perform downlink CQI measurement on the downlink CQI measurement resource received by the transceiver,
• wherein the downlink CQI measurement resource further comprises a time domain resource, the frequency domain resource comprises m sets of to-be-measured subbands, the time domain resource comprises m to-be-measured time windows, the m sets of to-be-measured subbands are in a one-to-one correspondence with the m to-be-measured time windows, each set of to-be-measured subbands comprises at least one to-be-measured subband, and each to-be-measured time window comprises at least one to-be-measured subframe, wherein m is an integer greater than or equal to 1, wherein a first set of the m sets of to-be-measured subbands corresponding to a first of the m to-be-measured time windows is different than a second set of the m sets of to-be-measured subbands corresponding to a second of the m to-be-measured time windows, wherein
• the transceiver is further caused to:
• send a downlink CQI measurement result to the base station, wherein the downlink CQI measurement result comprises a first CQI value measured by the processor on the downlink CQI measurement resource, wherein
• the downlink CQI measurement result further comprises a first offset value, and the first offset value is used to indicate a difference between a second CQI value of a subband measured by the processor and the first CQI value.

A computer program product stored in a non-transitory medium, comprising instructions which, when executed by a computer, cause the computer to:

• receive resource indication information from a base station, wherein the resource indication information is used to indicate a downlink CQI measurement resource, the downlink CQI measurement resource comprises a frequency domain resource, and a bandwidth of the frequency domain resource is less than a system bandwidth, wherein the downlink CQI measurement resource is specified by the base station based on an uplink resource allocated to an another UE by the base station;
• perform downlink CQI measurement on the downlink CQI measurement resource,
• wherein the downlink CQI measurement resource further comprises a time domain resource, the frequency domain resource comprises m sets of to-be-measured subbands, the time domain resource comprises m to-be-measured time windows, the m sets of to-be-measured subbands are in a one-to-one correspondence with the m to-be-measured time windows, each set of to-be-measured subbands comprises at least one to-be-measured subband, and each to-be-measured time window comprises at least one to-be-measured subframe, wherein m is an integer greater than or equal to 1, wherein a first set of the m sets of to-be-measured subbands corresponding to a first of the m to-be-measured time windows is different than a second set of the m sets of to-be-measured subbands corresponding to a second of the m to-be-measured time windows;
• and
• send a downlink CQI measurement result to the base station, wherein the downlink CQI measurement result comprises a first CQI value measured by the UE on the downlink CQI measurement resource, wherein
• the downlink CQI measurement result further comprises a first offset value, and the first offset value is used to indicate a difference between a second CQI value of a subband measured by the UE and the first CQI value.