Device-to-device wireless communication method and user equipment

• US 10,716,163 B2
• Filed: 02/21/2019
• Issued: 07/14/2020
• Est. Priority Date: 09/26/2014
• Status: Active Grant

• Current Assignee: Sun Patent Trust
• Original Assignee: Sun Patent Trust
• Inventors: Wang, Lilei, Basu Mallick, Prateek, Suzuki, Hidetoshi, Loehr, Joachim, Hoshino, Masayuki
• Primary Examiner(s): Moore, Jr., Michael J
• Application Number:
  US16/281,987
• Publication Number:
  US 20190182886A1
• Time in Patent Office: 509 Days
• Field of Search: None
• CPC Class Codes: H04W 36/033 in pre-organised networks
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/56 based on priority criteria
• CPC Class Codes: H04W 76/23 Manipulation of direct-mode connections

Abstract

Provided are D2D wireless communication methods and UEs therefor. In one embodiment, the D2D wireless communication method performed by a UE includes continuing D2D transmission by using a resource from a resource pool allocated for mode 2 operation when switching from mode 1 operation to mode 2 operation. In another embodiment, the D2D wireless communication method performed by a UE includes performing D2D transmission by using a resource from a resource pool allocated for mode 2 operation, wherein the resource pool is indicated by a dedicated RRC signaling transmitted by an eNB, a SIB transmitted by an eNB, a PD2DSCH transmitted by other UE(s), and/or pre-configuration, and the dedicated RRC signaling, the SIB, the PD2DSCH and the pre-configuration are in descending order in priority when determining the resource pool.

Claims

1. A communication apparatus comprising:

a receiver, which, in operation, receives information of two or more resource pools, a first resource pool of the two or more resource pools being indicated by a dedicated Radio Resource Control (RRC) signaling from an eNode B and a second resource pool of the two or more resource pools being indicated by a System Information Block (SIB) transmitted from the eNode B; and

a transmitter, which, in operation, transmits a device to device (D2D) signal using one of the two or more resource pools;

wherein, the first resource pool is prioritized in an RRC_CONNECTED state and the second resource pool is prioritized in an RRC IDLE state.

2. The communication apparatus according to claim 1, wherein a third resource pool of the two or more resource pools is a pre-configured resource pool.

3. The communication apparatus according to claim 1, wherein the communication apparatus is in mode 2, the mode 2 being a transmission mode in which the communication apparatus autonomously schedules resources for D2D communication.

4. The communication apparatus according to claim 1, wherein the second resource pool is used when the communication apparatus switches from mode 1 to mode 2, the mode 1 being a transmission mode in which the eNode B schedules resources for D2D communication and the mode 2 being a transmission mode in which the communication apparatus autonomously schedules resources for the D2D communication.

5. The communication apparatus according to claim 1, wherein each of the two or more resource pools includes a plurality of resources, and the transmitter, in operation, transmits the D2D signal that is mapped to one of the plurality of resources.

6. A communication method comprising:

receiving information of two or more resource pools, a first resource pool of the two or more resource pools being indicated by a dedicated Radio Resource Control (RRC) signaling from an eNode B and a second resource pool of the two or more resource pools being indicated by a System Information Block (SIB) transmitted from the eNode B; and

transmitting a device to device (D2D) signal using one of the two or more resource pools;

wherein, the first resource pool is prioritized in an RRC_CONNECTED state and the second resource pool is prioritized in an RRC IDLE state.

7. The communication method according to claim 6, wherein a third resource pool of the two or more resource pools is a pre-configured resource pool.

8. The communication method according to claim 6, wherein the communication method is performed by a communication apparatus that is in mode 2, the mode 2 being a transmission mode in which the communication apparatus autonomously schedules resources for D2D communication.

9. The communication method according to claim 6, wherein the second resource pool is used when a communication apparatus switches from mode 1 to mode 2, the mode 1 being a transmission mode in which the eNode B schedules resources for D2D communication and the mode 2 being a transmission mode in which the communication apparatus autonomously schedules resources for the D2D communication.

10. The communication method according to claim 6, wherein each of the two or more resource pools includes a plurality of resources, and the communication method includes transmitting the D2D signal that is mapped to one of the plurality of resources.