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CA-3079041-C - USER TERMINAL AND RADIO COMMUNICATION METHOD

CA3079041CCA 3079041 CCA3079041 CCA 3079041CCA-3079041-C

Abstract

A user terminal according to the present invention includes: a reception section that receives each of information indicating a code rate for a first uplink control channel, and information indicating a code rate for a second uplink control channel having a longer duration than that of the first uplink control channel; and a control section that controls transmission of Uplink Control Information (UCI) based on a code rate indicated by the information matching an uplink control channel used for the transmission of the uplink control information.

Inventors

  • Kazuki Takeda
  • Satoshi Nagata
  • Lihui Wang
  • Xiaolin Hou

Assignees

  • NTT DOCOMO, INC.

Dates

Publication Date
20260505
Application Date
20171019

Claims (15)

  1. CLAIMS 1. A terminal comprising: a receiver that receives an information element comprising a first information indicating a first maximum coding rate for a first uplink control channel format and a second information indicating a second maximum coding rate for a second uplink control channel format, the second uplink control channel format having a longer duration than that of the first uplink control channel format; and a processor that controls a transmission of an uplink control information based on the first information or based on the second information, wherein the first maximum coding rate is indicated by a first encoding information of values Oto 6 of the first information, and the second maximum coding rate is indicated by a second encoding information of values Oto 6 of the second information.
  2. 2. The terminal according to claim 1, wherein the processor determines a first coding rate based on an association between the first information and the first coding rate, or a second coding rate based on an association between the second information and the second coding rate.
  3. 3. The terminal according to claim 1, wherein the uplink control information includes a Hybrid Automatic Repeat reQuest-Acknowledgement (HARQ-ACK) 51 Date Rei;ue/Date Received 2024-03-08 information, a scheduling request, or a channel state information for a downlink data channel.
  4. 4. The terminal according to claim 1, wherein the receiver receives the first information and the second information via higher layer signaling.
  5. 5. The terminal according to claim 1, wherein the first uplink control channel format is PUCCH format 2 and the second uplink control channel format is a PUCCH format 3 or a PUCCH format 4.
  6. 6. The terminal according to claim 1, wherein the processor determines an uplink control channel format to use for the transmission of the uplink control information and controls the transmission of the uplink control information based on a code rate indicated by the first information or the second information matching the uplink control channel format determined by the processor.
  7. 7. A radio communication method performed by a terminal, the method comprising: receiving an information element comprising a first information indicating a first maximum coding rate for a first uplink control channel format and a second information indicating a second maximum coding rate for a second uplink control channel format, the second uplink control 52 Date Rei;ue/Date Received 2024-03-08 channel format having a longer duration than that of the first uplink control channel format; and controlling a transmission of an uplink control information based on the first information or based on the second information, wherein the first maximum coding rate is indicated by a first encoding information of values Oto 6 of the first information, and the second maximum coding rate is indicated by a second encoding information of values O to 6 of the second information.
  8. 8. A radio base station comprising: a transceiver that transmits an information element comprising a first information indicating a first maximum coding rate for a first uplink control channel format and a second information indicating a second maximum coding rate for a second uplink control channel format, the second uplink control channel format having a longer duration than that of the first uplink control channel format; and a receiver that receives an uplink control information transmitted from a terminal based on the first information or based on the second information, wherein the first maximum coding rate is indicated by a first encoding information of values Oto 6 of the first information, and the second maximum coding rate is indicated by a second encoding information of values Oto 6 of the second information. 53 Date Rei;ue/Date Received 2024-03-08
  9. 9. The terminal according to claim 2, wherein the uplink control information includes a Hybrid Automatic Repeat reQuest-Acknowledgement (HARQ-ACK) information, a scheduling request, or a channel state information for a downlink data channel.
  10. 10. The terminal according to claim 2, wherein the receiver receives the first information and the second information via higher layer signaling.
  11. 11. The terminal according to claim 3, wherein the receiver receives the first information and the second information via higher layer signaling.
  12. 12. The terminal according to claim 2, wherein the first uplink control channel format is a Physical Uplink Control Channel (PUCCH) format 2 and the second uplink control channel format is a PUCCH format 3 or a PUCCH format 4.
  13. 13. The terminal according to claim 3, wherein the first uplink control channel format is a Physical Uplink Control Channel (PUCCH) format 2 and the second uplink control channel format is a PUCCH format 3 or a PUCCH format 4.
  14. 14. The terminal according to claim 4, wherein the first uplink control channel format is a Physical Uplink Control Channel (PUCCH) format 2 and the second uplink control channel format is a PUCCH format 3 or a PUCCH format 4. 54 Date Rei;ue/Date Received 2024-03-08
  15. 15. The terminal according to claim 1, wherein the processor controls a transmission of the uplink control information via an uplink control channel using at least one of the first uplink control channel format and the second uplink control channel format according to a type of the uplink control information to be transmitted. 55 Date Rei;ue/Date Received 2024-03-08

Description

DESCRIPTION USER TERMINAL AND RADIO COMMUNICATION METHOD Technical Field [0001] The present invention relates to a user terminal and a radio communication method of a next-generation mobile communication system. Background Art [0002] In Universal Mobile Telecommunications System (UMTS) networks, for the purpose of higher data rates and lower latency, Long Term Evolution (LTE) has been specified (Non-Patent Literature 1 ). Furthermore, for the purpose of wider bands and a higher speed than those of LTE, LTE successor systems (also referred to as, for example, LTE-Advanced (LTE-A}, Future Radio Access (FRA}, 4G, 5G, 5G+ (plus}, New RAT (NR) or LTE Rel. 14, 15 or~} have been also studied. [0003] Legacy LTE systems (e.g., LTE Rel. 8 to 13) perform communication on Downlink (DL) and/or Uplink (UL) by using a subframe (also referred to as a Transmission Time Interval (TTI)) of 1 ms. The subframe is a transmission time unit of 1 channel-coded data packet, and is a processing unit such as scheduling, link adaptation or retransmission control (HARO: Hybrid Automatic Repeat reQuest). [0004] Furthermore, according to legacy LTE systems (e.g., LTE Rel. 8 to 13), a user terminal transmits Uplink Control Information (UCI) by using an uplink control channel (e.g., a PUCCH: Physical Uplink Control Channel) or an uplink Date reyu/Date Received 2020-04-14 data channel (e.g., a PUSCH: Physical Uplink Shared Channel). A configuration (format) of the uplink control channel is referred to as a PUCCH Format (PF). Citation List Non-Patent Literature [0005] Non-Patent Literature 1: 3GPP TS 36.300 V8.12.0 "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8}", April 2010 Summary of Invention Technical Problem [0006] Legacy LTE systems (e.g., LTE Rel. 13 and prior releases) support uplink control channels (e.g., LTE PUCCH formats 1 to 5) of a plurality of formats of an identical duration (e.g., 14 symbols in a case of general Cyclic Prefix (CP)). On the other hand, future radio communication systems (e.g., LTE Rel. 14, 15 and ~, 5G and NR) are assumed to support uplink control channels of a plurality of formats whose durations are at least different. [0007] For example, it has been studied for the future radio communication systems to support a first uplink control channel (also referred to as a short PUCCH or NR PUCCH formats O and/or 2) of a relatively short duration (e.g., 1 to 2 symbols}, and a second uplink control channel (also referred to as a long PUCCH or at least one of NR PUCCH formats 1, 3 and 4 below) having a longer 2 Date reyu/Date Received 2020-04-14 duration (e.g., 4 to 14 symbols) than that of the first uplink control channel. [0008] Thus, it is assumed that, when the uplink control channels of a plurality of formats whose durations are at least different are supported, transmission control of UCI in the legacy LTE systems (e.g., LTE Rel. 13 or prior releases) that support only a plurality of uplink control channels of the identical duration is not suitable. [0009] The present invention has been made in light of this point, and one of objects of the present invention is to provide a user terminal and a radio communication method that can appropriately control transmission of UCI when uplink control channels of a plurality of formats whose durations are at least different are supported. Solution to Problem [001 O] One aspect of a user terminal according to the present invention includes: a reception section that receives each of information indicating a code rate for a first uplink control channel, and information indicating a code rate for a second uplink control channel having a longer duration than that of the first uplink control channel; and a control section that controls transmission of Uplink Control Information (UCI) based on a code rate indicated by the information matching an uplink control channel used for the transmission of the uplink control information. Advantageous Effects of Invention [0011] According to the present invention, it is possible to appropriately control 3 Date reyu/Date Received 2020-04-14 transmission of UCI when uplink control channels of a plurality of formats whose durations are at least different are supported. Brief Description of Drawings [0012] Fig. 1 is a diagram illustrating one example of a table that indicates code rates of a legacy LTE system. Figs. 2A and 2B are diagrams illustrating configuration examples of uplink control channels. Fig. 3 is a diagram illustrating one example of PUCCH formats of a future radio communication system. Fig. 4 is a diagram illustrating a multiplexing example of a short PUCCH and a long PUCCH according to the present embodiment. Figs. 5A and 5B are diagrams illustrating one example of a table that indicates code rates according to the present embodiment. Fig. 6 is a diagram illustrating another example of allocation of a second PUCCH resou