# US 2023/0276451 A1 · Apparatus and method of joint search space set for enhanced pdcch transmission with multiple beams from multiple trps > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0276451 A1 - Document ID: US20230276451A1 - Status: Published application - Kind: A1 - Application number: 17/797,829 - Filed: 2020-02-07 - Published: 2023-08-31 - Earliest claimed: 2020-02-07 - Assignees: Lenovo (Beijing) Limited - Applicants: Lenovo (Beijing) Ltd. - Inventors: Yi Zhang; Chenxi Zhu; Bingchao Liu; Wei Ling - Web page: https://patentgrep.com/patent/US20230276451A1 ## CPC - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 1/0046: {Code rate detection or code type detection (H04L1/0038 takes precedence; detection of the data rate H04L25/0262; for packet format H04L1/0091)} - H04L 1/0053: {specially adapted for power saving} - H04L 1/0072: {Error control for data other than payload data, e.g. control data} - H04L 5/0035: {Resource allocation in a cooperative multipoint environment} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 72/566: of the information or information source or recipient - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Apparatus and methods of joint search space set for enhanced PDCCH transmission with multiple beams from multiple TRPs are disclosed. The apparatus includes: a processor that generates 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 transmitted from one of the transmitting-receiving identities; and configures an Information Element (IE) indicating a joint search space set for the DCI, wherein the joint search space set comprises a plurality of component search space sets; and a transmitter that transmits the DCI and the IE using the plurality of transmitting-receiving identities; wherein each one of the component search space sets is configured for monitoring and detecting one DCI version. ## Claims ### Claim 1 An apparatus, comprising: a transmitter; and a processor coupled to the transmitter configured to cause the apparatus to: generate 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 usable for the transmission of the transmitting-receiving identities; configure 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 transmit the DCI using the plurality of transmitting-receiving identities, and transmit the IE. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the plurality of component search space sets comprise an anchor search space set and an associated search space set, and the IE is configured for the anchor search space set and includes an identification number (ID) of the associated search space set. ### Claim 3 (depends on 2) The apparatus of claim 2, wherein the IE includes an ID of the joint search space set, the ID of the joint search space set being an ID of the anchor search space set, or a specifically assigned ID. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein a priority mapping rule for monitored physical downlink control channel (PDCCH) candidates and non-overlapping control channel elements (CCEs) is defined for the joint search space set, and a higher mapping priority is set for the joint search space set than that for other user equipment (UE) specific search space sets. ### Claim 5 (depends on 4) The apparatus of claim 4, wherein the priority mapping rule for the monitored PDCCH candidates and the non-overlapping CCEs is defined for the joint search space set, based on a higher priority being associated with a search space set having a smaller ID among a list of search space IDs, and wherein the list of search space IDs includes an ID of the joint search space set and does not include any ID of the component search space sets individually. ### Claim 6 (depends on 5) The apparatus of claim 5, wherein the ID of the joint search space set is determined based on an ID of the anchor search space set or a smallest ID of the component search space sets. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein a one-to-one mapping rule between two of the component search space sets is predefined or preconfigured for physical downlink control channel (PDCCH) candidates to reduce joint detection complexity. ### Claim at position 8 8-10. (canceled) ### Claim 11 (depends on 1) The apparatus of claim 1, wherein the processor coupled to the transmitter is configured to cause the apparatus to transmit a signaling to configure a receiving device to perform at least one of: detecting detect each one of the component search space sets independently; detecting detect each one of the component search space sets independently, and skip later component search space sets upon detection of the DCI in an earlier component search space set; or perform a joint detection for all of the component search space sets. ### Claim 12 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. ### Claim 13 (depends on 12) The apparatus of claim 12, wherein the plurality of component search space sets comprise an anchor search space set and an associated search space set and the IE is configured for the anchor search space set and includes an identification number (ID) of the associated search space set. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein the IE includes an ID of the joint search space set, the ID of the joint search space set being an ID of the anchor search space set, or a specifically assigned ID. ### Claim 15 (depends on 12) The apparatus of claim 12, wherein a priority mapping rule for monitored physical downlink control channel (PDCCH) candidates and non-overlapping control channel elements (CCEs) is defined for the joint search space set and a higher mapping priority is set for the joint search space set than that for other user equipment (UE) specific search space sets. ### Claim 16 (depends on 15) The apparatus of claim 15, wherein the priority mapping rule for the monitored PDCCH candidates and the non-overlapping CCEs is defined for the joint search space set, based on a higher priority being associated with a search space set having a smaller ID among a list of search space IDs, and wherein the list of search space IDs includes an ID of the joint search space set and does not include any ID of the component search space sets individually. ### Claim 17 (depends on 16) The apparatus of claim 16, wherein the ID of the joint search space set is determined based on an ID of the anchor search space set or a smallest ID of the component search space sets. ### Claim 18 (depends on 12) The apparatus of claim 12, wherein a one-to-one mapping rule between two of the component search space sets is predefined or preconfigured for the PDCCH candidates. ### Claim at position 17 19-21. (canceled) ### Claim 22 (depends on 12) The apparatus of claim 12, wherein the processor coupled to the receiver is configured to cause the apparatus to receive a signaling from a transmitting device for configuring the apparatus to perform at least one of: detect each one of the component search space sets independently; detect each one of the component search space sets independently, and skip later component search space sets upon detection of the DCI in an earlier component search space set; or perform a joint detection for all of the component search space sets. ### Claim 23 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. ### Claim 24 (depends on 23) The method of claim 23, wherein the plurality of component search space sets comprise an anchor search space set and an associated search space set and the IE is configured for the anchor search space set and includes an identification number (ID) of the associated search space set. ### Claim 25 (depends on 24) The method of claim 24, wherein the IE includes an ID of the joint search space set, the ID of the joint search space set being an ID of the anchor search space set, or a specifically assigned ID. ### Claim 26 (depends on 23) The method of claim 23, wherein a priority mapping rule for monitored physical downlink control channel (PDCCH) candidates and non-overlapping control channel elements (CCEs) is defined for the joint search space set, and a higher mapping priority is set for the joint search space set than that for other user equipment (UE) specific search space sets. ### Claim at position 23 27-44. (canceled)