# US 10,320,547 B2 · User terminal, radio base station 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 10,320,547 B2 - Document ID: US10320547B2 - Status: Granted - Kind: B2 - Application number: 15/546,306 - Filed: 2016-01-29 - Published: 2018-01-18 - Granted: 2019-06-11 - Earliest claimed: 2015-01-29 - Assignees: Ntt Docomo, Inc. - Applicants: Ntt Docomo, Inc. - Inventors: Kazuki Takeda; Tooru Uchino; Kazuaki Takeda; Satoshi Nagata - Web page: https://patentgrep.com/patent/US10320547B2 ## CPC - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04J 1/00: Frequency-division multiplex systems (H04J14/00 takes precedence) - H04J 11/00: Orthogonal multiplex systems, {e.g. using WALSH codes}(H04J13/00 takes precedence) - H04L 1/1671: {the supervisory signal being transmitted together with control information} - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04W 16/32: Hierarchical cell structures - H04W 72/04: Wireless resource allocation - H04W 72/044: based on the type of the allocated resource - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04J 13/004: {Orthogonal} - H04J 2011/0009: {with FDM/FDMA} - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract The present invention is designed so that uplink control signals can be transmitted adequately even when the number of component carriers that can be configured in a user terminal is expanded. A user terminal can communicate by using six or more component carriers, and has a receive receiving section that receives a DL signal, a transmission section that transmits a UL control signal, which includes a delivery acknowledgement signal in response to the DL signal, and a control section that controls a format to apply to the UL control signal, and the control section applies a format, having large capacity in comparison to a PUCCH format of an existing system in which the number of component carriers to be configured is five or less, to the UL control signal. ## Claims ### Claim 1 A user terminal comprising: a receiver that receives a downlink (DL) signal; a transmitter that transmits uplink (UL) control information which includes a delivery acknowledgement signal in response to the DL signal; and a processor that controls a format to apply to transmission of the UL control information, wherein the processor supports a new choice of format having a large number of bits in comparison to a Physical Uplink Control Channel (PUCCH) format of an existing system (Rel. 10-12) and changes the format to apply to the transmission of the UL control information based on a number of cells to which the DL signal is allocated. ### Claim 2 A radio base station comprising: a transmitter that transmits a downlink (DL) signal; a receiver that receives uplink (UL) control information which includes a delivery acknowledgement signal in response to the DL signal; and a processor that controls a format which a user terminal applies to the UL control information, wherein the processor configures the use terminal with a new choice of format having a large number of bits in comparison to a Physical Uplink Control Channel PUCCH format of an existing system (Rel. 10-12), and the receiver receives UL control information to which a given choice of format is applied based on a number of cells allocated with the DL signal. ### Claim 3 A radio communication method for a user terminal, comprising: receiving a downlink (DL) signal; generating a uplink (UL) control information which includes a delivery acknowledgement signal in response to the DL signal; and controlling a format to apply to transmission of the UL control information, wherein the user terminal supports a new choice of format having a large number of bits in comparison to a Physical Uplink Control Channel (PUCCH) format of an existing system (Rel. 10-12) and changes the format to apply to the transmission of the UL control information based on a number of cells to which the DL signal is allocated. ### Claim 4 (depends on 1) The user terminal according to claim 1, wherein when the new choice of format is configured by higher layer signaling, the processor determines the number of cells to which the DL signal is allocated, based on detection of a downlink control channel, and selects the new choice of format to apply to the transmission of the UL control information. ### Claim 5 (depends on 1) The user terminal according to claim 1, wherein the new choice of format applied by the processor has a smaller orthogonal code length than a PUCCH format 3. ### Claim 6 (depends on 1) The user terminal according to claim 1, wherein the new choice of format applied by the processor uses a plurality of Physical Resource Blocks (PRBs). ### Claim 7 (depends on 1) The user terminal according to claim 1, wherein when the cells to which the DL signal is allocated comprise only a primary cell, the processor applies the PUCCH format 1b of the existing system (Rel. 10-12) to the UL control information. ### Claim 8 (depends on 1) The user terminal according to claim 1, wherein the user terminal is capable of communication using six or more cells. ### Claim 9 (depends on 4) The user terminal according to claim 4, wherein the new choice of format applied by the processor has a smaller orthogonal code length than a PUCCH format 3. ### Claim 10 (depends on 4) The user terminal according to claim 4, wherein the new choice of format applied by the processor uses a plurality of Physical Resource Blocks (PRBs). ### Claim 11 (depends on 5) The user terminal according to claim 5, wherein the new choice of format applied by the processor uses a plurality of Physical Resource Blocks (PRBs). ### Claim 12 (depends on 4) The user terminal according to claim 4, wherein when the cells to which the DL signal is allocated comprise only a primary cell, the processor applies the PUCCH format 1b of the existing system (Rel. 10-12) to the UL control information. ### Claim 13 (depends on 5) The user terminal according to claim 5, wherein when the cells to which the DL signal is allocated comprise only a primary cell, the processor applies the PUCCH format 1b of the existing system (Rel. 10-12) to the UL control information. ### Claim 14 (depends on 6) The user terminal according to claim 6, wherein when the cells to which the DL signal is allocated comprise only a primary cell, the processor applies the PUCCH format 1b of the existing system (Rel. 10-12) to the UL control information. ### Claim 15 (depends on 4) The user terminal according to claim 4, wherein the user terminal is capable of communication using six or more cells. ### Claim 16 (depends on 5) The user terminal according to claim 5, wherein the user terminal is capable of communication using six or more cells. ### Claim 17 (depends on 6) The user terminal according to claim 6, wherein the user terminal is capable of communication using six or more cells. ### Claim 18 (depends on 7) The user terminal according to claim 7, wherein the user terminal is capable of communication using six or more cells.