Apparatus and method of joint search space set for enhanced pdcch transmission with multiple beams from multiple trps

An apparatus, comprising:

• a receiver;
• and
• a processor coupled to the receiver configured to cause the apparatus to:
• receive downlink control information (DCI) with a plurality of versions from a plurality of transmitting-receiving identities with a plurality of control resource sets (CORESETs), each CORESET usable for the transmission of one of the transmitting-receiving identities;
• receive an information element (IE) indicating a joint search space set for the DCI, the joint search space set comprises a plurality of component search space sets each configured for monitoring and detecting one DCI version;
• and
• decode the DCI by blindly detecting physical downlink control channel (PDCCH) candidates in the joint search space set based on the IE.

A method, comprising:

• generating, by a processor, a plurality of versions of downlink control information (DCI) for transmission from a plurality of transmitting-receiving identities with a plurality of control resource sets (CORESETs), each CORESET being used for the transmission of one of the transmitting-receiving identities;
• configuring, by the processor, an information element (IE) indicating a joint search space set for the DCI, the joint search space set comprises a plurality of component search space sets each configured for monitoring and detecting one DCI version;
• transmitting, by a transmitter, the DCI using the plurality of transmitting-receiving identities;
• and
• transmitting, by the transmitter, the IE.