Resource allocation for the relaying of device-to-device discovery messages

• US 9,930,513 B2
• Filed: 11/23/2015
• Issued: 03/27/2018
• Est. Priority Date: 11/23/2015
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Hampel, Karl Georg, Wang, Hua, Li, Junyi
• Primary Examiner(s): Qureshi, Afsar M
• Application Number:
  US14/948,997
• Publication Number:
  US 20170150485A1
• Time in Patent Office: 855 Days
• Field of Search: 370328, 370329, 370331
• 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 a frame, a subframe, a superframe, or a 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 as the first resource element and is 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 a frame, a subframe, a superframe, or a 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 as the first resource element and is 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 a frame, a subframe, a superframe, or a 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 as the first resource element and is 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 non-transitory 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.