USER TERMINAL, RADIO BASE STATION, AND RADIO COMMUNICATION METHOD

• US 20190044664A1
• Filed: 02/03/2017
• Published: 02/07/2019
• Est. Priority Date: 02/04/2016
• 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, Kazuaki, Nagata, Satoshi, Mu, Qin, Liu, Liu, Jiang, Huiling
• Application Number:
  US16/075,529
• Publication Number:
  US 20190044664A1
• Time in Patent Office: Days
• CPC Class Codes: H04L 1/1816 with retransmission of the same, encoded, message
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04L 5/0082 at predetermined intervals
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/1268 of uplink data flows
• 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 resource allocation is controlled by a frequency unit (for example, a subcarrier unit) that is smaller than a resource allocation unit of an existing LTE system, the present invention provides a user terminal having: a reception unit that receives downlink control information on a downlink control channel included in a given duration in a given bandwidth; and a control unit that controls uplink data transmission based on the downlink control information. The control unit controls start timing of the uplink data transmission with reference to a last subframe in which the downlink control channel is transmitted in the given duration

Claims

1. A user terminal comprising:

a reception unit that receives downlink control information on a downlink control channel included in a given duration in a given bandwidth; and

a control unit that controls uplink data transmission based on the downlink control information,

wherein the control unit controls start timing of the uplink data transmission with reference to a last subframe in which the downlink control channel is transmitted in the given duration.

2. The user terminal according to claim 1, wherein the control unit determines the start timing of the uplink data transmission based on information provided by the downlink control information included in the given duration.

3. The user terminal according to claim 1, wherein the control unit determines the last subframe in which the downlink control channel is transmitted in the given duration, based on information provided by the downlink control information.

4. The user terminal according to claim 1, wherein the downlink control information is transmitted repeatedly over different subframes.

9. The user terminal according to claim 2, wherein the control unit determines the last subframe in which the downlink control channel is transmitted in the given duration, based on information provided by the downlink control information.

10. The user terminal according to claim 2, wherein the downlink control information is transmitted repeatedly over different subframes.

11. The user terminal according to claim 3, wherein the downlink control information is transmitted repeatedly over different subframes.

5. A user terminal comprising:

a reception unit that receives downlink control information on a downlink control channel included in a given duration in a given bandwidth; and

a control unit that controls downlink data reception based on the downlink control information,

wherein the control unit controls start timing of the downlink data reception with reference to a last subframe in which the downlink control channel is transmitted in the given duration.

6. The user terminal according to claim 5, wherein the control unit determines the last subframe in which the downlink control channel is transmitted in the given duration, based on information provided by the downlink control information.

7. A radio base station comprising:

a transmission unit that transmits downlink control information by using a downlink control channel included in a given duration in a given bandwidth; and

a reception unit that receives uplink data transmitted from the user terminal based on the downlink control information,

wherein the reception unit controls start timing of uplink data reception with reference to a last subframe in which the downlink control channel is transmitted in the given duration.

8. (canceled)