# US 11,122,600 B2 · Terminals receiving downlink control signals and downlink data signals > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,122,600 B2 - Document ID: US11122600B2 - Status: Granted - Kind: B2 - Application number: 16/470,092 - Filed: 2017-11-30 - Published: 2020-07-30 - Granted: 2021-09-14 - Earliest claimed: 2016-12-19 - Assignees: Ntt Docomo, Inc. - Applicants: Ntt Docomo, Inc. - Inventors: Hideyuki Moroga; Kazuaki Takeda; Satoshi Nagata - Web page: https://patentgrep.com/patent/US11122600B2 ## CPC - H04L 27/2636: {with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]} - H04B 7/0413: MIMO systems - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 27/2602: {Signal structure} - H04L 27/26526: {with inverse FFT [IFFT] or inverse DFT [IDFT] demodulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] receiver or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/1268: of uplink data flows - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0023: {Time-frequency-space} - H04L 27/2614: {Peak power aspects} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A new configuration suitable for a downlink single carrier is provided in a downlink control signal of a radio communication system of the future. A user terminal includes: a reception section that receives a downlink signal including a downlink control signal and a downlink data signal; and a demodulation and decoding section that uses the downlink control signal to demodulate and decode the downlink data signal, in which the downlink control signal is mapped to signal transmission points of a single carrier in units of control channel elements. ## Claims ### Claim 1 A terminal comprising: a reception section that receives a downlink signal including a downlink control signal and a downlink data signal from a first radio base station; and a demodulation and decoding section that uses the downlink control signal to demodulate and decode the downlink data signal, wherein the downlink control signal is mapped to a signal transmission point of a single carrier in units of control channel elements, and wherein a plurality of the signal transmission points constitute a symbol, the symbol includes a first time region in which the downlink control signal is mapped and a second time region in which the downlink control signal is not mapped, and the first time region is different from a first time region of an adjacent radio base station, wherein, in a case when the control channel elements have an aggregation level equal to 2 and the control channel elements are positioned adjacent to each other, the plurality of the signal transmission points are located within the same symbol, wherein, in a case when the control channel elements have an aggregation level equal to 2 and the control channel elements are not positioned adjacent to each other, the plurality of the signal transmission points are located within more than one symbol, wherein the downlink control signal is repeatedly mapped in one of the control channel elements or repeatedly mapped between the control channel elements, and wherein a plurality of symbols constitutes a subframe, and the downlink control signal of the downlink signal for each of a plurality of the subframes is mapped in a specific one or more of the subframes. ### Claim 2 (depends on 1) The terminal according to claim 1, wherein the downlink control signal is transmitted in all layers or part of the layers of MIMO (Multiple Input Multiple Output). ### Claim 3 A terminal comprising: a reception section that receives a downlink signal including a downlink control signal and a downlink data signal from a first radio base station; and a demodulation and decoding section that uses the downlink control signal to demodulate and decode the downlink data signal, wherein the downlink control signal is mapped to contiguous subcarriers of discrete fourier transform spread orthogonal frequency division multiplexing, DFT-s-OFDM, in units of control channel elements, and wherein the downlink control signal is mapped in a first frequency region and the downlink control signal is not mapped in a second frequency region and the first frequency region is different from a first frequency region of an adjacent radio base station, wherein, in a case when the control channel elements have an aggregation level equal to 2 and the control channel elements are positioned adjacent to each other, the plurality of the signal transmission points are located within the same symbol, wherein, in a case when the control channel elements have an aggregation level equal to 2 and the control channel elements are not positioned adjacent to each other, the plurality of the signal transmission points are located within more than one symbol, wherein the downlink control signal is repeatedly mapped in one of the control channel elements or repeatedly mapped between the control channel elements, and wherein a plurality of symbols constitutes a subframe, and the downlink control signal of the downlink signal for each of a plurality of the subframes is mapped in a specific one or more of the subframes. ### Claim 4 (depends on 3) The terminal according to claim 3, wherein the downlink control signal is transmitted in all layers or part of the layers of MIMO (Multiple Input Multiple Output).