Efficient signaling of common reference signal shifts and physical downlink control channel region mismatch in coordinated multipoint transmission

An apparatus comprising:

• circuitry configured to
• provide information about a reference signal configuration for each cell of a set of cells potentially taking part in coordinated multipoint transmission;
• receive feedback including channel state information corresponding to the set of cells;
• and
• provide an indication of which cells of the set of cells are selected to take part in the coordinated multipoint transmission in response to the feedback, wherein the indication indicates at least a first state indicating serving cell-only transmission, a second state indicating that a subset of the set of cells are selected to take part in the coordinated multipoint transmission, or a third state indicating a configuration different from the first state and the second state.

A method comprising:

• obtaining information about a set of cells potentially taking part in coordinated multipoint transmission;
• obtaining information about a reference signal configuration for each cell of the set of cells;
• generating and transmitting feedback including channel state information corresponding to the set of cells;
• obtaining an indication of which cells of the set of cells are selected to take part in the coordinated multipoint transmission in response to the feedback, wherein the indication indicates at least a first state indicating serving cell-only transmission, a second state indicating that a subset of the set of cells are selected to take part in the coordinated multipoint transmission, or a third state indicating a configuration different from the first state and the second state;
• and
• receive data according to the state indicated by the indication of which cells of the set of cells are selected to take part in the coordinated multipoint transmission.