# US 12,225,518 B2 · Base station, terminal, and communication method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,225,518 B2 - Document ID: US12225518B2 - Status: Granted - Kind: B2 - Application number: 17/611,081 - Filed: 2020-05-01 - Published: 2022-07-28 - Granted: 2025-02-11 - Earliest claimed: 2019-05-29 - Assignees: Panasonic Intellectual Property Corporation of America - Applicants: Panasonic Intellectual Property Corporation of America - Inventors: Jun Minotani; Takashi Iwai; Tomofumi Takata; Yoshio Urabe - Web page: https://patentgrep.com/patent/US12225518B2 ## CPC - H04W 72/121: for groups of terminals or users - H04B 7/0426: Power distribution - H04B 7/0452: Multi-user MIMO systems - H04B 7/0456: Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting - H04B 7/06: at the transmitting station - H04L 27/26: Systems using multi-frequency codes (H04L27/32 takes precedence) - H04W 4/08: User group management - H04W 16/28: using beam steering - H04W 72/20: Control channels or signalling for resource management - H04W 84/12: WLAN [Wireless Local Area Networks] - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract This base station is provided with: a control circuit that generates information relating to a terminal group among a plurality of terminals, said terminal group being a target of transmission by non-orthogonal multiple access; and a transmission circuit that transmits the information relating to the terminal group during a period in which control information addressed to the plurality of terminals is transmitted. ## Claims ### Claim 1 A base station, comprising: control circuitry, which, in operation, generates information on a terminal group among a plurality of terminals, the terminal group being a target of transmission by non-orthogonal multiplexing, and generates a non-orthogonal multiplex access (NOMA) signal, wherein a length of the NOMA signal is determined based on a terminal with a lowest reception processing capability among the plurality of the terminals; and transmission circuitry, which, in operation, transmits the information on the terminal group during a period for transmitting common information for the plurality of terminals, wherein: the period for transmitting the common information for the plurality of terminals is during a period for transmitting control information addressed to the plurality of terminals, and the information on the terminal group is associated with some frequency resource candidate values among a plurality of frequency resource candidates in allocation information of a frequency resource indicated in the common information. ### Claim 2 (depends on 1) The base station according to claim 1, wherein the information on the terminal group includes information indicating whether each of the plurality of terminals is the target of the transmission by the non-orthogonal multiplexing. ### Claim 3 (depends on 1) The base station according to claim 1, wherein the information on the terminal group includes a value different for each of a plurality of terminal groups. ### Claim 4 (depends on 1) The base station according to claim 1, wherein the information on the terminal group includes information indicating whether the terminal group is assigned to the frequency resource indicated in the common information. ### Claim 5 (depends on 1) The base station according to claim 1, wherein the information on the terminal group includes information indicating a number of the terminals included in the terminal group in the frequency resource indicated in the common information. ### Claim 6 (depends on 1) The base station according to claim 1, wherein the transmission circuitry, in operation, transmits specific information portions for the plurality of terminals in the terminal group in order according to allocation power in the non-orthogonal multiplexing, during a period for transmitting the specific information portions within the period for transmitting the control information. ### Claim 7 (depends on 1) The base station according to claim 1, wherein the transmission circuitry, in operation, transmits the information on the terminal group during a period for transmitting specific information portions for the plurality of terminals in the terminal group within the period for transmitting the control information. ### Claim 8 (depends on 7) The base station according to claim 7, wherein the transmission circuitry, in operation, transmits the information on the terminal group for each of the plurality of terminals in the terminal group in order according to allocation power in the non-orthogonal multiplexing. ### Claim 9 (depends on 1) The base station according to claim 1, wherein, the control circuitry, in operation, determines transmission timings of response signals to data signals by the plurality of terminals based on information on a non-orthogonal multiplex signal reception processing capability of each of the plurality of terminals, and the transmission circuitry, in operation, transmits information on the transmission timings. ### Claim 10 A terminal, comprising: reception circuitry, which, in operation, receives information on a terminal group among a plurality of terminals that is non-orthogonally multiplexed, during a period for receiving common information for the plurality of terminals, wherein the period for receiving the common information for the plurality of terminals is during a period for receiving downlink control information addressed to the plurality of terminals, and receives a non-orthogonal multiplex access (NOMA) signal, wherein a length of the NOMA signal is determined based on a terminal with a lowest reception processing capability among the plurality of the terminals; and control circuitry, which, in operation, controls reception of a downlink non-orthogonal multiplex signal based on the information on the terminal group, wherein the information on the terminal group is associated with some frequency resource candidate values among a plurality of frequency resource candidates in allocation information of a frequency resource indicated in the common information. ### Claim 11 (depends on 10) The terminal according to claim 10, wherein the reception circuitry, in operation, receives information on a transmission timing of a response signal to a data signal, the transmission timing being a timing based on a non-orthogonal multiplex signal reception processing capability, and wherein, the terminal comprises transmission circuitry, which, in operation, transmits the response signal based on the transmission timing. ### Claim 12 A communication method, comprising: generating, by a base station, information on a terminal group among a plurality of terminals, the terminal group being a target of transmission by non-orthogonal multiplexing; generating a non-orthogonal multiplex access (NOMA) signal, wherein a length of the NOMA signal is determined based on a terminal with a lowest reception processing capability among the plurality of the terminals; transmitting, by the base station, the information on the terminal group during a period for transmitting common information for the plurality of terminals, wherein the period for transmitting the common information for the plurality of terminals is during a period for transmitting control information addressed to the plurality of terminals; and transmitting the NOMA signal, wherein the information on the terminal group is associated with some frequency resource candidate values among a plurality of frequency resource candidates in allocation information of a frequency resource indicated in the common information. ### Claim 13 A communication method, comprising: receiving, by a terminal, information on a terminal group among a plurality of terminals that is non-orthogonally multiplexed, during a period for receiving common information for the plurality of terminals, wherein the period for receiving the common information for the plurality of terminals is during a period for receiving downlink control information addressed to the plurality of terminals; receiving a non-orthogonal multiplex access (NOMA) signal, wherein a length of the NOMA signal is determined based on a terminal with a lowest reception processing capability among the plurality of the terminals; and controlling, by the terminal, reception of a downlink non-orthogonal multiplex signal based on the information on the terminal group, wherein the information on the terminal group is associated with some frequency resource candidate values among a plurality of frequency resource candidates in allocation information of a frequency resource indicated in the common information.