USER TERMINAL AND RADIO COMMUNICATION METHOD

• US 20200136778A1
• Filed: 07/13/2017
• Published: 04/30/2020
• Est. Priority Date: 07/13/2017
• Status: Abandoned Application

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Takeda, Kazuki, Nagata, Satoshi, Wang, Lihui, Hou, Xiaolin
• Application Number:
  US16/630,227
• Publication Number:
  US 20200136778A1
• Time in Patent Office: Days
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/261 Details of reference signals
• CPC Class Codes: 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]
• CPC Class Codes: H04L 5/0012 Hopping in multicarrier systems for frequency hopping in spread spectrum systems H04B1/713
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 72/1263 Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

To appropriately perform communication even when scheduling based on a plurality of time units is supported in a radio communication system, one aspect of a user terminal according to the present invention includes: a control section that controls reception of a DL signal and/or transmission of a UL signal to be scheduled by applying at least one of a first time unit and a second time unit shorter than the first time unit; and a transmission section that transmits the UL signal by using an uplink shared channel and/or an uplink control channel, and an allocation position of the UL signal and/or an allocation position of a reference signal used for demodulation of the DL signal are controlled based on a time unit to be applied to the scheduling.

Claims

1. A user terminal comprising:

a control section that controls reception of a DL signal and/or transmission of a UL signal to be scheduled by applying at least one of a first time unit and a second time unit shorter than the first time unit; and

a transmission section that transmits the UL signal by using an uplink shared channel and/or an uplink control channel,

wherein an allocation position of the UL signal and/or an allocation position of a reference signal used for demodulation of the DL signal are controlled based on a time unit to be applied to the scheduling.

2. The user terminal according to claim 1, wherein, when the first time unit is applied to the scheduling on UL and/or DL, an allocation position and/or a duration of an uplink control channel used for the transmission of the UL signal are restricted.

3. The user terminal according to claim 1, wherein, when the uplink shared channel is scheduled for a given first time unit in which the UL signal is allocated, the control section selects an uplink channel used for the transmission of the UL signal based on a configuration of the uplink control channel configured in the given first time unit.

4. The user terminal according to claim 1, wherein, when the second time unit is applied to scheduling on UL and/or DL, an allocation position and/or a duration of the uplink control channel used for the transmission of the UL signal are not restricted.

5. The user terminal according to claim 1, wherein the control section performs control to arrange a reference signal on a symbol irrespectively of a time unit to be applied to scheduling on UL and/or DL, the reference signal being used for demodulation of the uplink signal, and the symbol being arranged at least first in a time-domain to which the uplink shared channel is allocated.

7. The user terminal according to claim 2, wherein, when the uplink shared channel is scheduled for a given first time unit in which the UL signal is allocated, the control section selects an uplink channel used for the transmission of the UL signal based on a configuration of the uplink control channel configured in the given first time unit.

8. The user terminal according to claim 2, wherein the control section performs control to arrange a reference signal on a symbol irrespectively of a time unit to be applied to scheduling on UL and/or DL, the reference signal being used for demodulation of the uplink signal, and the symbol being arranged at least first in a time-domain to which the uplink shared channel is allocated.

9. The user terminal according to claim 3, wherein the control section performs control to arrange a reference signal on a symbol irrespectively of a time unit to be applied to scheduling on UL and/or DL, the reference signal being used for demodulation of the uplink signal, and the symbol being arranged at least first in a time-domain to which the uplink shared channel is allocated.

10. The user terminal according to claim 4, wherein the control section performs control to arrange a reference signal on a symbol irrespectively of a time unit to be applied to scheduling on UL and/or DL, the reference signal being used for demodulation of the uplink signal, and the symbol being arranged at least first in a time-domain to which the uplink shared channel is allocated.

6. A radio communication method of a user terminal comprising:

controlling reception of a DL signal and/or transmission of a UL signal to be scheduled by applying at least one of a first time unit and a second time unit shorter than the first time unit; and

transmitting the UL signal by using an uplink shared channel and/or an uplink control channel,

wherein an allocation position of the UL signal and/or an allocation position of a reference signal used for demodulation of the DL signal are controlled based on a time unit to be applied to the scheduling.