Feedback design of hierarchical coordinated multipoint transmission

An apparatus, comprising:

• circuitry configured to
• obtain a list including a predetermined number of cells;
• identify a cooperation set of cells including a cell serving the user equipment;
• determine whether each cell included in the list belongs to the identified cooperation set of the user equipment;
• and
• report, for cells belonging to the cooperation set of the user equipment, a first predetermined set of parameters, and report, for cells not belonging to the cooperation set of the user equipment, a second predetermined set of parameters,
• wherein the second predetermined set of parameters are coarser than the first set of predetermined parameters.

A non-transitory computer-readable medium encoded with computer-readable instructions, that when executed by circuitry, causes the circuitry to perform a method comprising:

• obtaining, at the user equipment, a list including a predetermined number of cells;
• identifying, at the user equipment, a cooperation set of cells including a cell serving the user equipment;
• determining, at the user equipment whether each cell included in the list belongs to the identified cooperation set of the user equipment;
• and
• for cells belonging to the cooperation set of the user equipment, reporting a first predetermined set of parameters, and
• for cells not belonging to the cooperation set of the user equipment, reporting a second predetermined set of parameters,
• wherein the second predetermined set of parameters are coarser than the first set of predetermined parameters.