Connection management method and device in d2d relay communication, terminal and base station

Patent metadata

Field	Value
Publication number	US-2018317276-A1
Application number	US-201816028450-A
Country	US
Kind code	A1
Filing date	Jul 6, 2018
Priority date	Jan 7, 2016
Publication date	Nov 1, 2018
Grant date	—

Abstract

The present invention discloses a connection management method in device-to-device (D2D) relay communication, a terminal and a base station. The connection management method in D2D relay communication includes: determining whether a relay terminal for performing the D2D relay communication is selected when an Radio Resource Control (RRC) connection between a remote terminal in a network coverage and a base station is not released; when the relay terminal is determined to be selected, determining whether the RRC connection with the base station can be released according to a resource configuration mode used by the remote terminal when performing a D2D communication. By utilizing the connection management method, problems of state transition and connection management of the terminal in the D2D relay communication can be solved.

First claim

We claim:

1 . A connection management method in device-to-device (D2D) relay communication, comprising:
determining whether a relay terminal for performing the D2D relay communication is selected when an Radio Resource Control (RRC) connection between a remote terminal in a network coverage and a base station is not released; when the relay terminal is determined to be selected, determining whether the RRC connection with the base station can be released according to a resource configuration mode used by the remote terminal when performing a D2D communication.

2 . The connection management method of claim 1 , wherein determining whether the RRC connection with the base station can be released according to the resource configuration mode used by the remote terminal when performing a D2D communication comprises:
determining that the RRC connection with the base station can be released when the remote terminal uses a resource pool mode when performing the D2D communication.

3 . The connection management method of claim 2 , further comprising:
sending a request message for changing a resource configuration mode to the base station when the remote terminal uses a scheduling mode when performing the D2D communication; receiving a resource pool configured by the base station and determining that the RRC connection with the base station can be released, when receiving a message that is fed back by the base station and represents that the resource configuration mode is agreed to change; or determining that the RRC connection with the base station cannot be released when receiving a message that is fed back by the base station and represents that the resource configuration mode is refused to change.

4 . The connection management method of claim 3 , wherein the request message comprises identification information used for indicating that the remote terminal has selected the relay terminal.

5 . The connection management method of claim 1 , further comprising:
when it is determined that the RRC connection with the base station can be released, sending an RRC connection release request to the base station; when receiving the message that is fed back by the base station and represents that the RRC connection is agreed to release, releasing the RRC connection between the base station to enter the idle state.

6 . A connection management method in device-to-device (D2D) relay communication, comprising:
receiving a request message for changing a resource configuration mode from a scheduling mode to a resource pool mode, sent by the remote terminal in a network coverage, an Radio Resource Control (RRC) connection between the remote terminal and a base station being not released; determining whether the resource configuration mode of the remote terminal is agreed to change according to number of resources of the resource pool mode and number of resources of the scheduling mode, and sending a message to the remote terminal for representing whether the resource configuration mode of the remote terminal is agreed to change.

7 . The connection management method of claim 6 , wherein determining whether the resource configuration mode of the remote terminal is agreed to change according to the number of resources of the resource pool mode and the number of resources of the scheduling mode, and sending the message to the remote terminal for representing whether the resource configuration mode of the remote terminal is agreed to change comprises:
when the number of resources of the resource pool mode is less than or equal to a first preset value, and the number of resources of the scheduling mode is larger than or equal to a second preset value, determining that the resource configuration mode of the remote terminal is refused to change, and sending a message representing that the resource configuration mode of the remote terminal is refused to change, to the remote terminal; or when the number of resources of the resource pool mode is larger than or equal to a third preset value, determining that the resource configuration mode of the remote terminal is agreed to change, and sending a message representing that the resource configuration mode of the remote terminal is agreed to change, to the remote terminal.

8 . The connection management method of claim 6 , further comprising:
when receiving an RRC connection release request sent by the remote terminal, feeding back a message representing that the RRC connection is agreed to release, to the remote terminal to make the remote terminal release the RRC connection with the base station.

9 . A terminal, comprising:
at least one processor; and a storage device storing a plurality of instructions, which when executed by the processor, causes the at least one processor to: determine whether a relay terminal for performing the D2D relay communication is selected when an Radio Resource Control (RRC) connection between the terminal in a network coverage and a base station is not released; when the judgment unit determines that the terminal selects the relay terminal, determine whether the RRC connection with the base station can be released according to a resource configuration mode used by the terminal when performing a D2D communication.

10 . The terminal of claim 9 , wherein the at least one processor further determines that the RRC connection with the base station can be released when the terminal uses a resource pool mode when performing the D2D communication.

11 . The terminal of claim 10 , wherein the at least one processor further:
sends a request message for changing a resource configuration mode to the base station when the terminal uses a scheduling mode when performing the D2D communication; receives a message that is fed back by the base station and represents that the resource configuration mode is agreed to change, and receives a resource pool configured by the base station; determines that the RRC connection with the base station can be released when receiving a message that is fed back by the base station and represents that the resource configuration mode is agreed to change; or determines that the RRC connection with the base station cannot be released when receiving a message that is fed back by the base station and represents that the resource configuration mode is refused to change.

12 . The terminal of claim 11 , wherein the request message comprises identification information used for indicating that the terminal has selected the relay terminal.

13 . The terminal of claim 9 , wherein the at least one processor further:
sends an RRC connection release request to the base station, when it is determined that the RRC connection with the base station can be released; releases the RRC connection between the terminal and the base station to enter the idle state, when receiving the message that is fed back by the base station and represents that the RRC connection is agreed to release.

14 . The terminal of claim 9 , wherein the base station:
receives a request message for changing a resource configuration mode from a scheduling mode to a resource pool mode, sent by the terminal in a network coverage, an Radio Resource Control (RRC) connection between the terminal and the base station being not released; determines whether the resource configuration mode of the terminal is agreed to change according to number of resources of the resource pool mode and number of resources of the scheduling mode; sends a message to the terminal for representing whether the resource configuration mode of the terminal is agreed to change.

15 . The term

Assignees

• Yulong Computer Telecommunication Scientific Shenzhen Co Ltd

Inventors

• Lei Yi-Xue
• Zhang yun-fei
• Zheng Qian

Classifications

• H04W76/23

  Manipulation of direct-mode connections · CPC title

• H04W76/14

  Direct-mode setup · CPC title

• H04B7/2606

  Arrangements for base station coverage control, e.g. by using relays in tunnels · CPC title

• H04W88/04

  adapted for relaying to or from another terminal or user · CPC title

• H04W76/30 Primary

  Connection release · CPC title