Method for measuring channel state information, network-side device, and user equipment

A method for measuring channel state information (CSI), wherein the method is implemented by a communication system comprising a user equipment (OE) that is configured to receive communication services from a network-side device, wherein the LIE is located within a cell of the network-side device, and wherein the method comprises:

• receiving, by the UE, configuration information from the network-side device, wherein the configuration information configures the UE to perform CSI measurement on different subframe sets on a flexible frequency band or sub-bands of the flexible frequency band, wherein the subframe sets are determined by the network-side device based on uplink-downlink configurations of subframes on the flexible frequency band or the sub-bands of the flexible frequency band in a target cell and at least one neighboring cell of the target cell, wherein the flexible frequency hand comprises a frequency band on which a transmission direction is configurable, wherein the subframe sets comprise a first subframe set or a second subframe set, wherein the target cell comprises a cell that provides the communication services in a first area, and wherein the neighboring cell comprises a cell that provides the communication services in an area adjacent to the first area covered by the target cell;
• and
• performing, by the UE, the CSI measurement on the first subframe set or the second subframe set based on the configuration information, wherein the first subframe set comprises subframes in which transmissions in the target cell are in a downlink direction and transmissions in the at least one neighboring cell are not all in the downlink direction, and wherein the second subframe set comprises subframes in which transmissions in the target cell and the at least one neighboring cell comprise different uplink-downlink configurations.

A base station, wherein the base station is part of a communication system comprising the base station that is configured to provide communication services to a user equipment (UE) that is located within a cell of the base station, and wherein the base station comprises:

• a non-transitory computer readable storage medium comprising instructions;
• and
• a computer processor coupled to the non-transitory computer readable storage medium and configured to execute the instructions to:
• determine configuration information, wherein the configuration information configures the UE to perform CSI measurement on different subframe sets on a flexible frequency band or sub-bands of the flexible frequency band, wherein the subframe sets are determined by the base station based on uplink-downlink configurations of subframes on the flexible frequency band or the sub-bands of the flexible frequency band in a target cell and at least one neighboring cell of the target cell, wherein the flexible frequency band comprises a frequency band on which a transmission direction is configurable, wherein the target cell comprises a cell that provides the communication services in a first area, and wherein the neighboring cell comprises a cell that provides the communication services in an area adjacent to the first area covered by the target cell;
• and
• send the configuration information to the UE to perform the CSI measurement based on the configuration information, wherein the subframe sets comprise a first subframe set or a second subframe set, wherein the first subframe set comprises subframe in which transmission in the target cell are in a downlink direction and transmissions in the at least one neighboring cell are not all in the downlink direction, and Wherein the second subframe set comprises subframes in which transmissions in the target cell and the at least one neighboring cell comprise different uplink-downlink configurations.