Transmission and reception of proximity detection signal for peer discovery

Patent metadata

Field	Value
Publication number	US-9485069-B2
Application number	US-201113085337-A
Country	US
Kind code	B2
Filing date	Apr 12, 2011
Priority date	Apr 15, 2010
Publication date	Nov 1, 2016
Grant date	Nov 1, 2016

Abstract

Techniques for performing peer discovery to enable peer-to-peer (P2P) communication are disclosed. In an aspect, a proximity detection signal used for peer discovery may be generated based on one or more physical channels and/or signals used in a wireless network. In one design, a user equipment (UE) may generate a proximity detection signal occupying at least one resource block based on a SC-FDMA modulation technique. In another design, the UE may generate a proximity detection signal occupying at least one resource block based on an OFDMA modulation technique. The UE may generate SC-FDMA symbols or OFDMA symbols in different manners for different physical channels. In yet another design, the UE may generate a proximity detection signal including a primary synchronization signal and a secondary synchronization signal. For all designs, the UE may transmit the proximity detection signal to indicate its presence and to enable other UEs to detect the UE.

First claim

What is claimed is:

1. A method for wireless communication, comprising:
generating a peer discovery proximity detection signal that includes a proximity detection reference signal and a proximity detection data signal, the peer discovery proximity detection signal containing information associated with a user equipment (UE) and occupying at least one resource block based on a single-carrier frequency division multiple access (SC-FDMA) modulation technique, each resource block covering a set of subcarriers in a plurality of symbol periods,
wherein the generating the peer discovery proximity detection signal comprises:
generating the proximity detection reference signal, which enables peer discovery of the UE, for at least one symbol period in each of the at least one resource block, and
generating the proximity detection data signal, which enables peer discovery of the UE, for at least one remaining symbol period in said each of the at least one resource block; and

transmitting the peer discovery proximity detection signal, which includes the proximity detection reference signal and the proximity detection data signal, by the UE to indicate presence of the UE.

2. The method of claim 1 , wherein the generating the peer discovery proximity detection signal comprises generating the peer discovery proximity detection signal occupying two resource blocks in two slots based on the SC-FDMA modulation technique.

3. The method of claim 2 , wherein the two resource blocks cover different sets of subcarriers with frequency hopping.

4. The method of claim 1 , wherein the generating the proximity detection reference signal comprises generating the proximity detection reference signal based on one of a set of reference signal sequences reserved for proximity detection signals transmitted by UEs.

5. The method of claim 1 , wherein the generating the proximity detection data signal comprises:
encoding data to be sent in the peer discovery proximity detection signal based on a coding scheme,
mapping the encoded data to modulation symbols based on a modulation scheme, and
generating at least one SC-FDMA symbol for the at least one remaining symbol period based on the modulation symbols.

6. The method of claim 5 , wherein the generating the proximity detection data signal further comprises:
selecting a modulation and coding scheme in a set of modulation and coding schemes supported for data transmission, and
determining the coding scheme and the modulation scheme based on the selected modulation and coding scheme.

7. The method of claim 1 , wherein the transmitting the peer discovery proximity detection signal comprises transmitting the peer discovery proximity detection signal on an uplink spectrum.

8. The method of claim 1 , wherein the transmitting the peer discovery proximity detection signal comprises transmitting the peer discovery proximity detection signal via a single antenna port.

9. The method of claim 1 , further comprising:
selecting the at least one resource block from among a plurality of resource blocks reserved for transmission of peer discovery proximity detection signals by UEs.

10. The method of claim 9 , wherein at least two neighboring base stations are allocated different pluralities of resource blocks for transmission of peer discovery proximity detection signals by UEs within coverage of the base stations.

11. The method of claim 1 , wherein the generating the peer discovery proximity detection signal comprises generating the peer discovery proximity detection signal for transmission on a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH).

12. The method of claim 1 , wherein the information associated with the UE includes one or more of a UE identity, service information indicative of a service requested by the UE, service information indicative of a service offered by the UE, and UE location information.

13. The method of claim 1 , further comprising reserving, by the UE, the at least one resource block for transmitting the peer discovery proximity detection signal.

14. An apparatus for wireless communication, comprising:
means for generating a peer discovery proximity detection signal that includes a proximity detection reference signal and a proximity detection data signal, the peer discovery proximity detection signal containing information associated with a user equipment (UE) and occupying at least one resource block based on a single-carrier frequency division multiple access (SC-FDMA) modulation technique, each resource block covering a set of subcarriers in a plurality of symbol periods,
wherein the means for generating the peer discovery proximity detection signal is configured to:
generate the proximity detection reference signal, which enables peer discovery of the UE, for at least one symbol period in each of the at least one resource block, and
generate the proximity detection data signal, which enables peer discovery of the UE, for at least one remaining symbol period in said each of the at least one resource block; and

means for transmitting the peer discovery proximity detection signal, which includes the proximity detection reference signal and the proximity detection data signal, by the UE to indicate presence of the UE.

15. The apparatus of claim 14 , further comprising:
means for selecting the at least one resource block from among a plurality of resource blocks reserved for transmission of peer discovery proximity detection signals by UEs.

16. The apparatus of claim 14 , wherein the means for generating the peer discovery proximity detection signal is configured to generate the peer discovery proximity detection signal for transmission on a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH).

17. An apparatus for wireless communication, comprising:
a memory; and
at least one processor coupled to the memory and configured to:
generate a peer discovery proximity detection signal that includes a proximity detection reference signal and a proximity detection data signal, the peer discovery proximity detection signal containing information associated with a user equipment (UE) and occupying at least one resource block based on a single-carrier frequency division multiple access (SC-FDMA) modulation technique, each resource block covering a set of subcarriers in a plurality of symbol periods, and to transmit the peer discovery proximity detection signal, which includes the proximity detection reference signal and the proximity detection data signal, by the UE to indicate presence of the UE,

wherein the at least one processor is configured to generate the proximity detection reference signal, which enables peer discovery of the UE, for at least one symbol period in each of the at least one resource block, and to generate the proximity detection data signal, which enables peer discovery of the UE, for at least one remaining symbol period in said each of the at least one resource block.

18. The apparatus of claim 17 , wherein the at least one processor is configured to select the at least one resource block from among a plurality of resource blocks reserved for transmission of peer discovery proximity detection signals by UEs.

19. The apparatus of claim 17 , wherein the at least one processor is configured to generate the peer discovery proximity detection signal for transmission on a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH).

20. A non-transitory computer-readable medium

Assignees

• Wang Renqiu
• Mallik Siddhartha
• Palanki Ravi
• Bhushan Naga
• Luo Tao
• Malladi Durga Prasad
• Qualcomm Inc

Inventors

• Wang Renqiu
• Mallik Siddhartha
• Palanki Ravi
• Bhushan Naga
• Luo Tao
• Malladi Durga Prasad

Classifications

• H04W76/02

  Electricity · mapped topic

• H04W8/005 Primary

  Discovery of network devices, e.g. terminals · CPC title

• H04L5/0053 Primary

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04W56/002

  Mutual synchronization · CPC title

• H04W92/18

  between terminal devices · CPC title