RESOURCE ALLOCATION FOR THE RELAYING OF DEVICE-TO-DEVICE DISCOVERY MESSAGES

• US 20170150485A1
• Filed: 11/23/2015
• Published: 05/25/2017
• Est. Priority Date: 11/23/2015
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: HAMPEL, Karl Georg, LI, Junyi, WANG, Hua
• Granted Patent: US 9,930,513 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user

Abstract

A method, an apparatus, and a computer-readable medium for wireless communication are provided. The apparatus receives a discovery message through a device-to-device communication channel using a first resource element corresponding to a first time slot and a first frequency resource. The device-to-device communication channel may be a wireless communication channel. Upon reception of the discovery message, the apparatus determines a second resource element corresponding to a second time slot and a second frequency resource based on the first time slot and the first frequency resource in a deterministic resource allocation manner. The apparatus may alter the discovery message for rebroadcast in a deterministic message alteration manner. The apparatus rebroadcasts the discovery message using the second resource element. The discovery message may be rebroadcast through the same device-to-device communication channel in which the discovery message is received.

Claims

1. A method of wireless communication, comprising:

receiving a discovery message through a device-to-device communication channel using a first resource element corresponding to a first time slot and a first frequency resource;

determining a second resource element corresponding to a second time slot and a second frequency resource based on the first time slot and the first frequency resource in a deterministic resource allocation manner; and

rebroadcasting the discovery message using the second resource element.

2. The method of claim 1, wherein the device-to-device communication channel uses a synchronized time slotted structure, wherein the synchronized time slotted structure is one of frame, subframe, superframe, or Transmission Time Interval (TTI).

3. The method of claim 2, wherein the first resource element is within a first synchronized time slotted structure, wherein the second resource element is a same resource element within a second synchronized time slotted structure that is a fixed number of synchronized time slotted structures after the first synchronized time slotted structure.

4. The method of claim 1, wherein the second time slot is determined by applying a delay of a fixed number of time slots to the first time slot.

5. The method of claim 4, wherein the second frequency resource is determined by applying a shift to the first frequency resource.

6. The method of claim 5, wherein the shift is a fixed shift.

7. The method of claim 5, wherein the shift is derived based on a set of parameters that is known to all re-broadcasters.

8. The method of claim 7, wherein the set of parameters comprise one or more of an index of the first frequency resource, a time of reception, or at least a portion of content of the discovery message.

9. The method of claim 1, wherein the device-to-device communication channel is a wireless communication channel.

10. The method of claim 1, further comprising altering the discovery message for rebroadcast in a deterministic message alteration manner.

11. The method of claim 1, wherein the discovery message is rebroadcast through the device-to-device communication channel.

12. An apparatus for wireless communication, comprising:

means for receiving a discovery message through a device-to-device communication channel using a first resource element corresponding to a first time slot and a first frequency resource;

means for determining a second resource element corresponding to a second time slot and a second frequency resource based on the first time slot and the first frequency resource in a deterministic resource allocation manner; and

means for rebroadcasting the discovery message using the second resource element.

13. The apparatus of claim 12, wherein the device-to-device communication channel uses a synchronized time slotted structure, wherein the synchronized time slotted structure is one of frame, subframe, superframe, or Transmission Time Interval (TTI).

14. The apparatus of claim 13, wherein the first resource element is within a first synchronized time slotted structure, wherein the second resource element is a same resource element within a second synchronized time slotted structure that is a fixed number of synchronized time slotted structures after the first synchronized time slotted structure.

15. The apparatus of claim 12, wherein the second time slot is determined by applying a delay of a fixed number of time slots to the first time slot.

16. The apparatus of claim 15, wherein the second frequency resource is determined by applying a shift to the first frequency resource.

17. The apparatus of claim 16, wherein the shift is a fixed shift.

18. The apparatus of claim 16, wherein the shift is derived based on a set of parameters that is known to all re-broadcasters.

19. The apparatus of claim 18, wherein the set of parameters comprise one or more of an index of the first frequency resource, a time of reception, or at least a portion of content of the discovery message.

20. The apparatus of claim 12, further comprising means for altering the discovery message for rebroadcast in a deterministic message alteration manner.

21. An apparatus for wireless communication, comprising:

a memory; and

at least one processor coupled to the memory and configured to;

receive a discovery message through a device-to-device communication channel using a first resource element corresponding to a first time slot and a first frequency resource;

determine a second resource element corresponding to a second time slot and a second frequency resource based on the first time slot and the first frequency resource in a deterministic resource allocation manner; and

rebroadcast the discovery message using the second resource element.

22. The apparatus of claim 21, wherein the device-to-device communication channel uses a synchronized time slotted structure, wherein the synchronized time slotted structure is one of frame, subframe, superframe, or Transmission Time Interval (TTI).

23. The apparatus of claim 22, wherein the first resource element is within a first synchronized time slotted structure, wherein the second resource element is a same resource element within a second synchronized time slotted structure that is a fixed number of synchronized time slotted structures after the first synchronized time slotted structure.

24. The apparatus of claim 21, wherein the second time slot is determined by applying a delay of a fixed number of time slots to the first time slot.

25. The apparatus of claim 24, wherein the second frequency resource is determined by applying a shift to the first frequency resource.

26. The apparatus of claim 25, wherein the shift is a fixed shift.

27. The apparatus of claim 25, wherein the shift is derived based on a set of parameters that is known to all re-broadcasters.

28. The apparatus of claim 27, wherein the set of parameters comprise one or more of an index of the first frequency resource, a time of reception, or at least a portion of content of the discovery message.

29. The apparatus of claim 21, wherein the at least one processor is further configured to alter the discovery message for rebroadcast in a deterministic message alteration manner.

30. A computer-readable medium storing computer executable code for wireless communication, comprising code for:

receiving a discovery message through a device-to-device communication channel using a first resource element corresponding to a first time slot and a first frequency resource;

determining a second resource element corresponding to a second time slot and a second frequency resource based on the first time slot and the first frequency resource in a deterministic resource allocation manner; and

rebroadcasting the discovery message using the second resource element.