# US 12,225,551 B2 · Base station, terminal, transmission method, and reception method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,225,551 B2 - Document ID: US12225551B2 - Status: Granted - Kind: B2 - Application number: 18/448,705 - Filed: 2023-08-11 - Published: 2023-11-30 - Granted: 2025-02-11 - Earliest claimed: 2016-12-20 - Assignees: Sun Patent Trust - Applicants: Sun Patent Trust - Inventors: Ayako Horiuchi; Hidetoshi Suzuki; Kazuki Takeda; Lilei Wang - Web page: https://patentgrep.com/patent/US12225551B2 ## CPC - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 84/042: {Public Land Mobile systems, e.g. cellular systems} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Disclosed is a base station capable of appropriately configuring a resource on which an EPDCCH is located when soft combining is applied. The base station includes a configuration section that configures an EPDCCH set in a plurality of subframes, where the EPDCCH set is formed of ECCEs to which control information (assignment information) transmitted over the plurality of subframes is assigned. The base station includes an assignment section that assigns the control information to any of the ECCEs in each of the plurality of subframes. ## Claims ### Claim 1 A base station comprising: a transmitter, which, in operation, transmits, a first control information relating to a set of downlink time domains, and which, in operation, transmits in two or more than two downlink time domains of the set of downlink time domains a second control information used for a scheduling of a Physical Uplink Shared Channel (PUSCH); and a receiver, which, in operation, receives the PUSCH in an uplink time domain, the uplink time domain being determined according to a last time domain of the set of downlink time domains. ### Claim 2 (depends on 1) The base station according to claim 1, wherein the transmitter, in operation, transmits in two or more than two downlink time domains of another set of downlink time domains a third control information used for a scheduling of a Physical Downlink Shared Channel (PDSCH); and the PDSCH in a downlink time domain based on the third control information, the downlink time domain being determined according to a last time domain of the other set of downlink time domains. ### Claim 3 (depends on 1) The base station according to claim 1, wherein: the transmits, in operation, transmits in two or more than two downlink time domains of another set of downlink time domains a third control information used for a scheduling of a Physical Downlink Shared Channel (PDSCH); and the PDSCH in a downlink time domain based on the third control information; and the receiver, which in operation, receives ACK/NACK information indicating detection results of the PDSCH in an uplink time domain, the uplink time domain being determined according to a last time domain in which the PDSCH is transmitted. ### Claim 4 (depends on 3) The base station according to claim 3, wherein the ACK/NACK information is transmitted on a Physical Uplink Control Channel (PUCCH) resource associated with an Enhanced Control Channel Element (ECCE) index on which the other control information is mapped. ### Claim 5 (depends on 1) The base station according to claim 1, wherein repetitions of the control information is mapped in a same Physical Resource Block (PRB) in each time domain of the set of downlink time domains. ### Claim 6 (depends on 1) The base station according to claim 1, wherein a common precoding is used for the control information in the set of downlink time domains. ### Claim 7 (depends on 1) The base station according to claim 1, wherein repetitions of the control information is located in a resource region to which downlink data is assigned. ### Claim 8 (depends on 1) The base station according to claim 1, wherein the uplink time domain is four time domains after the last time domain of the set of downlink time domains in frequency-division duplex (FDD). ### Claim 9 A communication method comprising: transmitting a first control information relating to a set of downlink time domains, and transmitting, in two or more than two downlink time domains of the set of downlink time domains, a second control information used for a scheduling of a Physical Uplink Shared Channel (PUSCH); and receiving the PUSCH in an uplink time domain, the uplink time domain being determined according to a last time domain of the set of downlink time domains. ### Claim 10 (depends on 9) The communication method according to claim 9, comprising: transmitting, in two or more than two downlink time domains of another set of downlink time domains, a third control information used for a scheduling of a Physical Downlink Shared Channel (PDSCH); and transmitting the PDSCH in a downlink time domain based on the third control information, the downlink time domain being determined according to a last time domain of the other set of downlink time domains. ### Claim 11 (depends on 9) The communication method according to claim 9, comprising: transmitting, in two or more than two downlink time domains of another set of downlink time domains, a third control information used for a scheduling of a Physical Downlink Shared Channel (PDSCH); transmitting the PDSCH in a downlink time domain based on the third control information; and receiving ACK/NACK information indicating detection results of the PDSCH in an uplink time domain, the uplink time domain being determined according to a last time domain in which the PDSCH is transmitted. ### Claim 12 (depends on 11) The communication method according to claim 11, wherein the ACK/NACK information is transmitted on a Physical Uplink Control Channel (PUCCH) resource associated with an Enhanced Control Channel Element (ECCE) index on which the other control information is mapped. ### Claim 13 (depends on 9) The communication method according to claim 9, wherein repetitions of the control information is mapped in a same Physical Resource Block (PRB) in each time domain of the set of downlink time domains. ### Claim 14 (depends on 9) The communication method according to claim 9, wherein a common precoding is used for the control information in the set of downlink time domains. ### Claim 15 (depends on 9) The communication method according to claim 9, wherein repetitions of the control information is located in a resource region to which downlink data is assigned. ### Claim 16 (depends on 9) The communication method according to claim 9, wherein the uplink time domain is four time domains after the last time domain of the set of downlink time domains in frequency-division duplex (FDD).