# US 11,909,465 B2 · Terminal and radio communication method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,909,465 B2 - Document ID: US11909465B2 - Status: Granted - Kind: B2 - Application number: 17/775,109 - Filed: 2019-11-08 - Published: 2022-12-08 - Granted: 2024-02-20 - Earliest claimed: 2019-11-08 - Assignees: Ntt Docomo, Inc. - Applicants: Ntt Docomo, Inc. - Inventors: Yuki Matsumura; Satoshi Nagata; Shaozhen Guo; Jing Wang; Xiaolin Hou - Web page: https://patentgrep.com/patent/US11909465B2 ## CPC - H04B 7/0413: MIMO systems - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04B 7/06: at the transmitting station - H04B 7/08: at the receiving station - H04L 5/0035: {Resource allocation in a cooperative multipoint environment} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04W 16/28: using beam steering - H04W 72/1273: of downlink data flows - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04B 7/0691: {using subgroups of transmit antennas} - H04W 72/232: the control data signalling from the physical layer, e.g. DCI signalling - H04B: TRANSMISSION - 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 A terminal according to an aspect of the present disclosure includes a receiving section that receives one piece of downlink control information (DCI) for scheduling a plurality of downlink shared channels (PDSCHs), and a control section that determines either a single TCI state or a plurality of TCI states for the plurality of PDSCHs in at least one of a first case and a second case, the first case being a case that a time offset from the DCI to the plurality of PDSCHs is shorter than a threshold, the second case being a case that a transmission configuration indication (TCI) field is not configured. According to an aspect of the present disclosure, QCL parameters for multi-panel/TRP can be appropriately determined. ## Claims ### Claim 1 A terminal comprising: a receiver that receives a medium access control control element (MAC CE); and a processor that controls, based on a number of transmission configuration indication (TCI) states corresponding to a certain TCI codepoint, among a plurality of TCI codepoints configured by the MAC CE, to perform either a single transmission/reception point (TRP) operation or a multi-TRP operation, wherein when performing the single TRP operation, the processor determines a number of code division multiplexing (CDM) groups and DMRS ports based on a first DMRS table, and when performing the multi-TRP operation, the processor determines a number of CDM groups and DMRS ports based on a second DMRS table that differs from the first DMRS table. ### Claim 2 (depends on 1) The terminal according to claim 1, wherein when the number of TCI states corresponding to the certain TCI codepoint is one, the processor controls to perform a single TRP operation, and when the number of TCI states corresponding to the certain TCI codepoint is two, the processor controls to perform a multi-TRP operation. ### Claim 3 (depends on 2) The terminal according to claim 2, wherein the certain TCI codepoint is a smallest or largest TCI codepoint among the plurality of TCI codepoints. ### Claim 4 (depends on 1) The terminal according to claim 1, wherein the certain TCI codepoint is a smallest or largest TCI codepoint among the plurality of TCI codepoints. ### Claim 5 (depends on 1) The terminal according to claim 1, wherein a number of entries in the second DMRS table is greater than a number of entries in the first DMRS table. ### Claim 6 A radio communication method for a terminal, comprising: receiving a medium access control control element (MAC CE); and controlling, based on a number of transmission configuration indication (TCI) states corresponding to a certain TCI codepoint, among a plurality of TCI codepoints configured by the MAC CE, to perform either a single transmission/reception point (TRP) operation or a multi-TRP operation, wherein when performing the single TRP operation, determining a number of code division multiplexing (CDM) groups and DMRS ports based on a first DMRS table, and when performing the multi-TRP operation, determining a number of CDM groups and DMRS ports based on a second DMRS table that differs from the first DMRS table. ### Claim 7 A system comprising a terminal and a base station, wherein the terminal comprises: a receiver that receives a medium access control control element (MAC CE); and a processor that controls, based on a number of transmission configuration indication (TCI) states corresponding to a certain TCI codepoint, among a plurality of TCI codepoints configured by the MAC CE, to perform either a single transmission/reception point (TRP) operation or a multi-TRP operation, wherein when performing the single TRP operation, the processor determines a number of code division multiplexing (CDM) groups and DMRS ports based on a first DMRS table, and when performing the multi-TRP operation, the processor determines a number of CDM groups and DMRS ports based on a second DMRS table that differs from the first DMRS table, and the base station comprises: a transmitter that transmits the MAC CE.