Resource selection for device to device discovery or communication

Patent metadata

Field	Value
Publication number	US-10159061-B2
Application number	US-201715618997-A
Country	US
Kind code	B2
Filing date	Jun 9, 2017
Priority date	Jan 29, 2014
Publication date	Dec 18, 2018
Grant date	Dec 18, 2018

Abstract

A wireless transmit receive unit (WTRU) may perform provide a report to a network. The WTRU may include a processor that is configured to receive a measurement configuration from the network, where the measurement configuration indicates a threshold and a resource pool on which to perform measurements. The resources pool may be used for communication between one or more mobile device. The processor may be configured to perform measurements on the resource pool and determine whether an energy level for the resource pool is above the threshold for a duration of time. The processor may also be configured to send a report to the network indicating that the energy level for the resource pool is above the threshold for the predetermined duration of time.

First claim

What is claimed is:

1. A wireless transmit receive unit (WTRU) comprising:
a processor configured to:
receive a measurement configuration from a network, the measurement configuration indicating a threshold and a resource pool on which to perform measurements, wherein the resource pool is configured for direct communications between multiple WTRUs, and the resource pool comprises a plurality of resources;
measure respective energy levels of the resources in the resource pool;
determine a ratio of the resources in the resource pool that have a measured energy level above the threshold for a duration of time; and
send a report to the network indicating the ratio.

2. The WTRU of claim 1 , wherein the resource pool comprises sidelink resources.

3. The WTRU of claim 1 , wherein the resource pool comprises physical sidelink control channel (PSCCH) resources.

4. The WTRU of claim 1 , wherein the resource pool comprises resources used for device-to-device (D2D) discovery.

5. The WTRU of claim 1 , wherein the ratio indicates a percentage of the resources of the resource pool that is occupied.

6. The WTRU of claim 1 , wherein, when the ratio exceeds a specific level, the report indicates that the resources in the resource pool are insufficient for the WTRU to meet a target QoS or discovery transmission rate.

7. The WTRU of claim 1 , wherein the report comprises an indication of a number of subframes during which the respective measured energy levels of the resources in the resource pool are above the threshold.

8. The WTRU of claim 1 , wherein the measurement configuration is received via radio resource control (RRC) signaling.

9. A method comprising:
receiving a measurement configuration from a network, the measurement configuration indicating a threshold and a resource pool on which to perform measurements, wherein the resource pool is configured for direction communications between multiple wireless transmit receive units (WTRUs), and the resource pool comprises a plurality of resources;
measure respective energy levels of the resources in the resource pool;
determining a ratio of the resources in the resource pool that have a measured energy level above the threshold for a duration of time; and
sending a report to the network indicating the ratio.

10. The method of claim 9 , wherein the resource pool comprises sidelink resources.

11. The method of claim 9 , wherein the resource pool comprises physical sidelink control channel (PSCCH) resources.

12. The method of claim 9 , wherein the resource pool comprises resources used for device-to-device (D2D) discovery.

13. The method of claim 9 , wherein the ratio indicates a percentage of the resources of the resource pool that is occupied.

14. The method of claim 9 , wherein, when the ratio exceeds a specific level, the report indicates that the resources in the resource pool are insufficient to meet a target QoS or discovery transmission rate.

15. The method of claim 9 , wherein the report comprises an indication of a number of subframes during which the respective measured energy levels of the resources in the resource pool are above the threshold.

16. The method of claim 9 , wherein the measurement configuration is received via radio resource control (RRC) signaling.

Assignees

• Interdigital Patent Holdings Inc

Inventors

• Zhao Yuxin
• Pani Diana
• Pelletier Ghyslain
• Marinier Paul
• Pelletier Benoit
• Kaur Samian

Classifications

• H04W72/51

  based on terminal or device properties · CPC title

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W72/541

  using the level of interference · CPC title

• H04W88/04

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

• H04W76/14

  Direct-mode setup · CPC title