User equipment and base station device

Patent metadata

Field	Value
Publication number	US-2021243586-A1
Application number	US-201817265702-A
Country	US
Kind code	A1
Filing date	Sep 13, 2018
Priority date	Sep 13, 2018
Publication date	Aug 5, 2021
Grant date	—

Abstract

A user equipment includes a receiving unit that executes sensing for a part of candidate resources to be used for transmission of inter-terminal direct communication, a control unit that determines a resource to be used for transmission based on a result of the sensing, and a transmitting unit that transmits a message to another units of user equipment using the determined resource.

First claim

1 . A user equipment, comprising:
a receiving unit that executes sensing for a part of candidate resources to be used for transmission of inter-terminal direct communication; a control unit that determines a resource to be used for transmission based on a result of the sensing; and a transmitting unit that transmits a message to another user equipment using the determined resource.

2 . The user equipment according to claim 1 , wherein the part of the candidate resources to be used for the transmission is one symbol at a beginning in a time domain of the candidate resources to be used for the transmission or a plurality of symbols allocated from a second symbol from the beginning.

3 . The user equipment according to claim 2 , wherein, upon detecting that a resource is used in the one symbol at the beginning in the time domain of the candidate resource to be used for the transmission, the plurality of symbols allocated from the second symbol from the beginning are not sensed.

4 . The user equipment according to claim 2 , wherein, upon not detecting that a resource is used in the one symbol at the beginning in the time domain of the candidate resource to be used for the transmission, the plurality of symbols allocated from the second symbol from the beginning are sensed.

5 . The user equipment according to claim 1 , wherein, upon detecting a notification indicating that the candidate resources to be used for the transmission are scheduled, the candidate resources to be used for the transmission are not sensed and are excluded from resource candidates used for transmission.

6 . A base station device, comprising:
a receiving unit that receives information indicating that a candidate resource used for transmission of inter-terminal direct communication is reserved by a first user equipment; and a control unit that prevents scheduling the candidate resources to be used for the transmission to a user equipment based on the information indicating the reservation, wherein, when the candidate resource to be used for the transmission is already scheduled to a second user equipment, scheduling a new resource to the first user equipment is executed.

Assignees

• Ntt Docomo Inc

Inventors

• Osawa Ryosuke
• Wang Huan
• Zheng Xufei
• Hou Xiaolin

Classifications

• H04L47/76

  using dynamic resource allocation, e.g. in-call renegotiation requested by the user or requested by the network in response to changing network conditions · CPC title

• H04W28/021

  in wireless networks with changing topologies, e.g. ad-hoc networks (self-organizing networks H04W84/18) · CPC title

• H04W74/0808

  using carrier sensing, e.g. carrier sense multiple access [CSMA] · CPC title

• H04B17/382

  for resource allocation, admission control or handover · CPC title

• H04W84/18

  Self-organising networks, e.g. ad-hoc networks or sensor networks · CPC title