SIGNALING FOR DEVICE-TO-DEVICE WIRELESS COMMUNICATION

• US 20140254429A1
• Filed: 10/02/2011
• Published: 09/11/2014
• Est. Priority Date: 10/02/2011
• Status: Abandoned Application

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Wang, Haiming, Gao, Chunyan, Wei, Na, Bai, Wei
• Application Number:
  US14/349,107
• Publication Number:
  US 20140254429A1
• Time in Patent Office: Days
• US Class Current: 370/254
• CPC Class Codes: H04L 27/0006 Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio for spectrum sharing between different networks H04W16/14
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals

Abstract

The specification and drawings present a new method, apparatus and software related product (e.g., a computer readable memory) for implementing a direct device-to-device communication of cellular devices, e.g., in LTE wireless systems, using discovery or discovery-like signaling To enable automatic discovery of other devices, a dedicated channel may be reserved for this purpose where devices may send a specific discovery signal with a predefined format, so that other devices listening in this channel can know the existence of the transmitters. For example, the discovery signal may be generated by one device for establishing a direct device-to-device communication, the discovery signal comprising a preamble part and a data part which comprises information for establishing the direct device-to-device communication, wherein a preamble resource for the preamble part is determined from a set of predefined resources and a data resource for the data part maps form the preamble resource.

Claims

1. A method comprising:

providing a discovery signal by a first device in a wireless network for establishing a direct device-to-device communication, the discovery signal comprising a preamble part and a data part which comprises information for establishing said direct device-to-device communication, wherein a preamble resource for the preamble part is determined from a first set of predefined resources and a data resource for the data part maps from the preamble resource;

sending the preamble part using the preamble resource; and

sending the data part after sending the preamble part using the data resource.

2. The method of claim 1, wherein the first device is one of a first user equipment and a first evolved Node B.

3. The method of claim 1, wherein the preamble resource is determined by the first device randomly selecting from within the first set of predefined resources.

4. The method of claim 1, wherein the preamble part comprises at least one of:

an identification sequence and the data resource maps from the preamble resource in dependence on the identification sequence, and

an indication of an identity of the first device.

5. The method of claim 4, wherein said identification sequence is a Zaddof-Chu sequence.

7. The method of claim 1, wherein the preamble resource and the data resource are in at least one of:

adjacent subframes and different subframes.

8. The method of claim 1, wherein the direct device-to-device communications are established among user equipments in one cell.

10. The method of claim 1, wherein the preamble part is synchronized in time using downlink transmit timing of a network access node.

11. The method of claim 1, wherein the first device learns the set of predefined resources from signaling received from a network.

12. The method of claim 1, wherein said information for establishing the direct device-to-device communication comprises at least one of:

an identification of at least the first device,

a resource reserved for the direct device-to-device communication, and

a service supported by the first device.

13. The method of claim 1, wherein said information for establishing the direct device-to-device communication comprises an identification of the first device and of a second device with which the direct device-to-device communication is to be established.

6. (canceled)

9. (canceled)

14-19. -19. (canceled)

20. An apparatus comprising:

a processing system comprising at least one processor and a memory storing a set of computer instructions, in which the processing system is arranged to cause the apparatus to;

provide a discovery signal by a first device in a wireless network for establishing a direct device-to-device communication, the discovery signal comprising a preamble part and a data part

which comprises information for establishing said direct device-to-device communication, wherein a preamble resource for the preamble part is determined from a first set of predefined resources and a data resource for the data part maps from the preamble resource;

send the preamble part using the preamble resource; and

send the data part after sending the preamble part using the data resource.

21. The apparatus of claim 20, wherein the first device is one of a first user equipment and a first evolved Node B.

22. The apparatus of claim 20, wherein the preamble resource is determined by the first device randomly selecting from within the first set of predefined resources.

23. The apparatus of claim 20, wherein the preamble part comprises an identification sequence and the data resource maps from the preamble resource in dependence on the identification sequence.

24. The apparatus of claim 20, wherein the preamble resource and the data resource are in at least one of:

adjacent subframes and different subframes.

26. The apparatus of claim 20, wherein the preamble part is synchronized in time using downlink transmit timing of a network access node.

27. The apparatus of claim 20, wherein the first device learns the set of predefined resources from signaling received from a network.

28. The apparatus of claim 20, wherein said information for establishing the direct device-to-device communication comprises at least one of:

an identification of at least the first device,

a resource reserved for the direct device-to-device communication, and

a service supported by the first device.

25. (canceled)

29-33. -33. (canceled)

34. A computer readable memory encoded with a computer program comprising computer readable instructions recorded thereon for execution a method comprising:

providing a discovery signal by a first device in a wireless network for establishing a direct device-to-device communication, the discovery signal comprising a preamble part and a data part which comprises information for establishing said direct device-to-device communication, wherein a preamble resource for the preamble part is determined from a first set of predefined resources and a data resource for the data part maps from the preamble resource;

sending the preamble part using the preamble resource; and

sending the data part after sending the preamble part using the data resource.

35. (canceled)