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US-12628194-B2 - Terminal

US12628194B2US 12628194 B2US12628194 B2US 12628194B2US-12628194-B2

Abstract

A terminal comprising: a communication unit that performs a transmission of an uplink signal using two or more uplink channels with different priorities; and a control unit that performs a multiplexing control on a multiplexing of two or more uplink channels when a multiplexing timeline condition on the multiplexing of two or more uplink channels is satisfied, and performs a prioritization control on a prioritization of two or more uplink channels when a prioritization timeline condition on the prioritization of two or more uplink channels is satisfied; wherein the control unit determines whether or not the prioritization timeline condition is satisfied, after determining whether or not the multiplexing timeline condition is satisfied.

Inventors

  • Yuki Takahashi
  • Shinya Kumagai
  • Satoshi Nagata

Assignees

  • NTT DOCOMO, INC.

Dates

Publication Date
20260512
Application Date
20201009

Claims (4)

  1. 1 . A terminal comprising: a transmitter that performs a transmission of an uplink signal using an uplink channel; and a processor that performs a multiplexing control on a multiplexing of two or more uplink channels having different priorities when receiving an information element to configure the multiplexing control and when satisfying a multiplexing timeline condition on the multiplexing of the two or more uplink channels, wherein the processor performs a prioritization control on a prioritization of the two or more uplink channels when not receiving the information element and when satisfying a prioritization timeline condition on the prioritization of the two or more uplink channels.
  2. 2 . A base station comprising: a receiver that performs a reception of an uplink signal using an uplink channel; and a processor that indicates to perform a multiplexing control on a multiplexing of two or more uplink channels having different priorities when satisfying a multiplexing timeline condition on the multiplexing of the two or more uplink channels, by transmitting an information element to configure the multiplexing control, wherein the processor indicates to perform a prioritization control on a prioritization of the two or more uplink channels when satisfying a prioritization timeline condition on the prioritization of the two or more uplink channels, by not transmitting the information element.
  3. 3 . A radio communication system comprising: a terminal; and a base station, wherein the terminal comprises: a transmitter that performs a transmission of an uplink signal using an uplink channel; and a terminal-side processor that performs a multiplexing control on a multiplexing of two or more uplink channels having different priorities when receiving an information element to configure the multiplexing control and when satisfying a multiplexing timeline condition on the multiplexing of the two or more uplink channels, wherein the terminal-side processor performs a prioritization control on a prioritization of the two or more uplink channels when not receiving the information element and when satisfying a prioritization timeline condition on the prioritization of the two or more uplink channels, and the base station comprises: a base station-side processor that indicates to perform the multiplexing control when satisfying the multiplexing timeline condition, by transmitting the information element, wherein the base station-side processor indicates to perform the prioritization control when satisfying the prioritization timeline condition, by not transmitting the information element.
  4. 4 . A radio communication method performed by a terminal comprising: performing a transmission of an uplink signal using an uplink channel; performing a multiplexing control on a multiplexing of two or more uplink channels having different priorities when receiving an information element to configure the multiplexing control and when satisfying a multiplexing timeline condition on the multiplexing of the two or more uplink channels; and performing a prioritization control on a prioritization of the two or more uplink channels when not receiving the information element and when satisfying a prioritization timeline condition on the prioritization of the two or more uplink channels.

Description

TECHNICAL FIELD The present disclosure relates to terminals that perform radio communication, in particular, terminals that perform radio communication using two or more uplink channels with different priorities. BACKGROUND ART 3rd Generation Partnership Project (3GPP) specifies 5th generation mobile communication system (5G, also called New Radio (NR) or Next Generation (NG), further, a succeeding system called Beyond 5G, 5G Evolution or 6G is being specified. Release 15 of 3GPP supports multiplexing of two or more uplink channels (PUCCH (Physical Uplink Control Channel) and PUSCH (Physical Uplink Shared Channel)) transmitted in the same slot. In the multiplexing of the uplink channel, the multiplexing timeline condition that the time between the reception of the DCI and the transmission of the uplink channel must satisfy is prescribed. Release 16 (NR) of 3GPP supports the prioritization of two or more uplink channels transmitted in the same slot. In the prioritization of the uplink channel, a prioritization timeline condition is defined that the time between the reception of the DCI and the transmission of the uplink channel must meet. In addition, Release 17 of 3GPP agreed to support multiplexing of the uplink channels with different priorities (For example, Non-Patent Literature 1). CITATION LIST Non-Patent Literature Non-Patent Literature 1 “Enhanced Industrial Internet of Things (IoT) and ultra-reliable and low latency communication,” RP-201310, 3GPP TSG PAN Meeting #86 e, 3GPP, July 2020 SUMMARY OF INVENTION Against this background, the inventors have found, after careful consideration, that a case can be assumed in which the priority timeline condition is satisfied but the multiple timeline condition is not. In other words, the inventors have found that they are unable to perform adequate control over multiplexing and prioritization when assuming multiplexing of uplink channels with different priorities. Therefore, the following disclosure has been made in view of this situation, and the purpose is to provide a terminal that can appropriately control multiplexing and prioritization of uplink channels with different priorities. An aspect of this disclosure is a terminal comprising: a communication unit that performs a transmission of an uplink signal using two or more uplink channels with different priorities; and a control unit that performs a multiplexing control on a multiplexing of two or more uplink channels when a multiplexing timeline condition on the multiplexing of two or more uplink channels is satisfied, and performs a prioritization control on a prioritization of two or more uplink channels when a prioritization timeline condition on the prioritization of two or more uplink channels is satisfied; wherein the control unit determines whether or not the prioritization timeline condition is satisfied, after determining whether or not the multiplexing timeline condition is satisfied. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an overall schematic diagram of radio communication system 10. FIG. 2 is a diagram showing the frequency range used in radio communication system 10. FIG. 3 is a diagram showing an example configuration of the radio frame, subframe and slot used in radio communication system 10. FIG. 4 is a functional block configuration diagram of the UE 200. FIG. 5 is a diagram for explaining the processing timeline conditions. FIG. 6 is a diagram for explaining the multiple timeline conditions. FIG. 7 is a diagram for explaining the prioritized timeline conditions. FIG. 8 is a diagram for explaining the issues. FIG. 9 is a diagram for explaining the issues. FIG. 10 is a diagram for explaining Control example 1. FIG. 11 is a diagram for explaining Control example 2. FIG. 12 is a diagram for explaining Control example 3. FIG. 13 is a diagram showing an example of operation. FIG. 14 is a diagram showing an example of the hardware configuration of the UE 200. MODES FOR CARRYING OUT THE INVENTION Exemplary embodiments of the present invention are explained below with reference to the accompanying drawings. Note that, the same or similar reference numerals have been attached to the same functions and configurations, and the description thereof is appropriately omitted. Embodiment (1) Overall Schematic Configuration of the Radio Communication System FIG. 1 is an overall schematic diagram of a radio communication system 10 according to the embodiment. The radio communication system 10 is a radio communication system according to 5G New Radio (NR) and includes a Next Generation-Radio Access Network 20 (herein below referred to as NG-RAN 20) and a terminal 200 (herein below referred to as UE 200). The radio communication system 10 may be a radio communication system according to a scheme called Beyond 5G, 5G Evolution or 6G. The NG-RAN 20 includes a radio base station 100A (herein below referred to as gNB 100A) and a radio base station 100B (herein below referred to as gNB 100B). The specific confi