METHOD AND APPARATUS FOR PERFORMING DEVICE-TO-DEVICE DISCOVERY

• US 20140056220A1
• Filed: 08/22/2013
• Published: 02/27/2014
• Est. Priority Date: 08/23/2012
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Poitau, Gwenael, Pelletier, Ghyslain, Marinier, Paul, Pani, Diana, Kaur, Samian, Pelletier, Benoit
• Granted Patent: US 9,843,986 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04L 67/51 Discovery or management thereof, e.g. service location protocol [SLP] or web services
• CPC Class Codes: H04W 40/246 Connectivity information discovery
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals

Abstract

Methods and apparatus for performing device-to-device (D2D) discovery are described. A service discovery process may include a discoverable device (e.g., a wireless transmit/receive unit (WTRU)) sending a discovery request, over a wireless connection, for a radio resource for the purpose of performing a transmission for radio frequency (RF) proximity detection for a given service. The WTRU may receive a discovery response including a configuration for RF proximity detection from a network, which configuration may be associated to the service. The configuration for RF proximity may be received by dedicated signaling, (e.g., physical downlink shared channel (PDSCH)), in particular for a discoverable WTRU. The configuration for RF proximity may be received on a broadcast channel, (e.g., a discovery shared channel (DISCH)), in particular for a monitoring WTRU, and may include one or more service identities, each associated with an RF proximity detection configuration, or a validity information and a measurement configuration.

Claims

1. A method for a wireless transmit/receive unit (WTRU) performing device-to-device (D2D) discovery, the method comprising:

the WTRU sending a discovery request to another WTRU or a network to initiate a discovery process used to perform radio frequency (RF) proximity detection for a service, wherein the discovery request includes at least one discovery identity; and

the WTRU monitoring a channel for a discovery response.

2. The method of claim 1 wherein the WTRU has a discoverable status or a monitoring status.

3. The method of claim 1 further comprising:

the WTRU receiving a configuration for a D2D channel.

4. The method of claim 1 further comprising:

an application in the WTRU triggering a services recovery procedure.

5. The method of claim 1 wherein the discovery request further includes a status parameter based on a security context or a battery level of the WTRU.

6. The method of claim 1 wherein the discovery request further includes a reference to a temporary discovery process identifier to indicate whether the discovery request is a reiteration of a rejected request.

7. The method of claim 1 further comprising:

the WTRU sending a discovery report message to the other WTRU or the network.

8. The method of claim 1 wherein the discovery request further includes a discovery class parameter associated with a power class indicating a maximum range for RF discovery.

9. The method of claim 1 wherein the discovery request further includes a discovery class parameter associated with a service corresponding to a public service application.

10. A method for a wireless transmit/receive unit (WTRU) performing device-to-device (D2D) discovery, the method comprising:

the WTRU receiving a configuration for radio frequency (RF) proximity detection from another WTRU or a network, wherein the configuration is associated with a service and includes a discovery process identifier.

11. The method of claim 10 wherein the configuration for RF proximity detection is received by dedicated signaling over a physical downlink shared channel (PDSCH).

12. The method of claim 10 wherein the configuration for RF proximity detection is received on a discovery shared channel (DISCH).

13. The method of claim 12 further comprising:

receiving over the DISCH at least one service identity associated with an RF proximity detection configuration, validity information and a measurement configuration.

14. The method of claim 13 wherein a transmission including the at least one service identity, the validity information and the measurement configuration is scheduled by a physical downlink shared channel (PDSCH) using a specific radio network temporary identity (RNTI) and subframe timing.

15. The method of claim 13 further comprising:

the WTRU determining a validity time of a resource to initiate transmission of an RF proximity detection signal on the resource.

16. The method of claim 13 further comprising:

the WTRU determining a validity time of a resource to initiate reception of an RF proximity detection signal on the resource using the measurement configuration.

17. A wireless transmit/receive unit (WTRU) comprising:

a transmitter configured to send a discovery request to another WTRU or a network to initiate a discovery process used to perform radio frequency (RF) proximity detection for a service, wherein the discovery request includes at least one discovery identity; and

a receiver configured to monitor a channel for a discovery response.

18. The WTRU of claim 17 wherein the receiver is configured to receive a configuration for a device-to-device (D2D) channel.

19. The WTRU of claim 17 wherein the discovery request further includes a status parameter based on a security context or a battery level of the WTRU.

20. The WTRU of claim 17 wherein the discovery request further includes a reference to a temporary discovery process identifier to indicate whether the discovery request is a reiteration of a rejected request.