METHODS FOR SENDING SMALL PACKETS IN A PEER-TO-PEER (P2P) NETWORK

• US 20090016271A1
• Filed: 07/07/2008
• Published: 01/15/2009
• Est. Priority Date: 07/09/2007
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Tavildar, Saurabh, Laroia, Rajiv, Wu, Xinzhou, Li, Junyi
• Granted Patent: US 8,259,743 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

An improved mechanism is provided that facilitates transmission of small packets within an ad hoc peer-to-peer network. A small packet is identified to a receiver within a control channel so that its lower power can be considered in an interference management protocol implemented among local peer devices. In a traffic slot, a transmitter voluntarily backs down on the transmitter power as a smaller packet will require much lower signal-to-noise ratio. This will improve the signal energy per bit per noise power density for the transmission as well as minimize the interference caused to other wireless communications happening in the same spectrum.

Claims

1. A method operational at a second device having a peer-to-peer connection with a first device to facilitate interference management of small packet transmissions using flash signaling within an ad hoc wireless network, comprising:

receiving a signal in a plurality of predetermined subsets of resource units;

calculating a first phase to be used in a desired signal in each of the plurality of predetermined subsets of resource units, the desired signal being sent by the first device; and

determining one resource unit in each of the plurality of predetermined subsets of resource units in which the desired signal is sent as a function of the received signal and calculated first phase.

2. The method of claim 1, further comprising:

recovering information bits transported in the desired signal from the location of the determined one resource unit in each of the plurality of predetermined subsets of resource units.

3. The method of claim 2, wherein the calculated first phase is the same in each of the plurality of predetermined subsets of resource units and is generated from at least one of a first identifier of the first device, a second identifier of the second device, and an identifier of the peer-to-peer connection between the first and the second devices.

4. The method of claim 2, wherein the calculated first phase is determined as a function of a predetermined sequence, the calculated first phase being different in the different predetermined subsets of resource units.

5. The method of claim 4, wherein the predetermined sequence is generated from at least one of a first identifier of the first device, a second identifier of the second device, and an identifier of the peer-to-peer connection between the first and the second devices.

6. The method of claim 2, further comprising:

calculating a power to be used in the desired signal in each of the plurality of predetermined subsets of resource units, wherein the calculated power is determined as a function of a predetermined sequence, the calculated power being different in the different predetermined subsets of resource units, and wherein the one resource unit is determined also as a function of the calculated power.

7. The method of claim 1, further comprising:

calculating a second phase to be used in an interference signal in each of the plurality of predetermined subsets of resource units, the interference signal being transmitted by an interfering device; and

wherein the one resource unit is determined also as a function of the calculated second phase.

8. A second device having a peer-to-peer connection with a first device to facilitate interference management of small packet transmissions using flash signaling within an ad hoc wireless network, comprising:

a transmitter and receiver for establishing the peer-to-peer communication connection with the first device;

a processing circuit coupled to the transmitter and receiver, wherein the processing circuit is adapted to;

receive a signal in a plurality of predetermined subsets of resource units;

calculate a first phase to be used in a desired signal in each of the plurality of predetermined subsets of resource units, the desired signal being sent by the first device; and

determine one resource unit in each of the plurality of predetermined subsets of resource units in which the desired signal is sent as a function of the received signal and calculated first phase.

9. The second device of claim 8, wherein the processing circuit is further adapted to:

recover information bits transported in the desired signal from the location of the determined one resource unit in each of the plurality of predetermined subsets of resource units.

10. The second device of claim 9, wherein the calculated first phase is the same in each of the plurality of predetermined subsets of resource units and is generated from at least one of a first identifier of the first device, a second identifier of the second device, and an identifier of the peer-to-peer connection between the first and the second devices.

11. The second device of claim 9, wherein the calculated first phase is determined as a function of a predetermined sequence, the calculated first phase being different in the different predetermined subsets of resource units.

12. The second device of claim 11, wherein the predetermined sequence is generated from at least one of a first identifier of the first device, a second identifier of the second device, and an identifier of the peer-to-peer connection between the first and the second devices.

13. The second device of claim 9, wherein the processing circuit is further adapted to:

calculate a power to be used in the desired signal in each of the plurality of predetermined subsets of resource units, wherein the calculated power is determined as a function of a predetermined sequence, the calculated power being different in the different predetermined subsets of resource units, and wherein the one resource unit is determined also as a function of the calculated power.

14. The second device of claim 8, wherein the processing circuit is further adapted to:

calculate a second phase to be used in an interference signal in each of the plurality of predetermined subsets of resource units, the interference signal being transmitted by an interfering device; and

wherein the one resource unit is determined also as a function of the calculated second phase.

15. A second device having a peer-to-peer connection with a first device to facilitate interference management of small packet transmissions using flash signaling within an ad hoc wireless network, comprising:

means for receiving a signal in a plurality of predetermined subsets of resource units;

means for calculating a first phase to be used in a desired signal in each of the plurality of predetermined subsets of resource units, the desired signal being sent by the first device; and

means for determining one resource unit in each of the plurality of predetermined subsets of resource units in which the desired signal is sent as a function of the received signal and calculated first phase.

16. The second device of claim 15, further comprising:

means for recovering information bits transported in the desired signal from the location of the determined one resource unit in each of the plurality of predetermined subsets of resource units.

17. The second device of claim 16, wherein the calculated first phase is the same in each of the plurality of predetermined subsets of resource units and is generated from at least one of a first identifier of the first device, a second identifier of the second device, and an identifier of the peer-to-peer connection between the desired and the second devices.

18. The second device of claim 16, further comprising:

means for calculating a power to be used in the desired signal in each of the plurality of predetermined subsets of resource units, wherein the calculated power is determined as a function of a predetermined sequence, the calculated power being different in the different predetermined subsets of resource units, and wherein the one resource unit is determined also as a function of the calculated power.

19. The second device of claim 16, further comprising:

means for calculating a second phase to be used in an interference signal in each of the plurality of predetermined subsets of resource units, the interference signal being transmitted by an interfering device, and wherein the one resource unit is also determined as a function of the calculated second phase.

20. A circuit for facilitating communications over a peer-to-peer network, wherein the circuit operates in a second device having a peer-to-peer connection with a first device to facilitate interference management of small packet transmissions using flash signaling within an ad hoc wireless network, wherein the circuit is adapted to:

receive a signal in a plurality of predetermined subsets of resource units;

calculate a first phase to be used in a desired signal in each of the plurality of predetermined subsets of resource units, the desired signal being sent by the first device; and

determine one resource unit in each of the plurality of predetermined subsets of resource units in which the desired signal is sent as a function of the received signal and calculated first phase.

21. A machine-readable medium comprising instructions for a second device having a peer-to-peer connection with a first device to facilitate interference management of small packet transmissions using flash signaling within an ad hoc wireless network, which when executed by a processor causes the processor to:

receive a signal in a plurality of predetermined subsets of resource units;

calculate a first phase to be used in a desired signal in each of the plurality of predetermined subsets of resource units, the desired signal being sent by the first device; and

determine one resource unit in each of the plurality of predetermined subsets of resource units in which the desired signal is sent as a function of the received signal and calculated first phase.

22. A method operational at a first device having a peer-to-peer connection with a second device to facilitate interference management of small packet transmissions within an ad hoc wireless network, comprising:

partitioning a set of resource units into a plurality of predetermined subsets of resource units;

determining one resource unit in each of the plurality of predetermined subsets of resource units as a function of a set of bits; and

transmitting a signal in the determined one resource unit in each of the plurality of predetermined subsets of resource units.

23. The method of claim 22, wherein the set of bits are generated from a set of information bits with an encoder.

24. The method of claim 23, wherein the phase of the transmitted signal in the determined one resource unit is the same in each of the plurality of predetermined subsets of resource units and is generated from at least one of a first identifier of the first device, a second identifier of the second device, and an identifier of the peer-to-peer connection between the first and the second devices.

25. The method of claim 23, further comprising:

generating a plurality of phases as a function of a predetermined sequence, wherein the phase of the transmitted signal in the determined one resource unit in each of the plurality of predetermined subsets of resource units is equal to one of the generated plurality of phases.

26. The method of claim 25, wherein the predetermined sequence is generated from at least one of a first identifier of the first device, a second identifier of the second device, and an identifier of the peer-to-peer connection between the first and the second devices.

27. The method of claim 23, further comprising:

generating a plurality of power values as a function of a predetermined sequence, wherein the power of the transmitted signal in the determined one resource unit in each of the plurality of predetermined subsets of resource units is equal to one of the generated plurality of power values.

28. A first device having a peer-to-peer connection with a second device to facilitate interference management of small packet transmissions within an ad hoc wireless network, comprising:

a transmitter and receiver for establishing the peer-to-peer communication connection with the first device;

a processing circuit coupled to the transmitter and receiver, wherein the processing circuit is adapted to;

partition a set of resource units into a plurality of predetermined subsets of resource units;

determine one resource unit in each of the plurality of predetermined subsets of resource units as a function of a set of bits; and

transmit a signal in the determined one resource unit in each of the plurality of predetermined subsets of resource units.

29. The first device of claim 28, wherein the set of bits are generated from a set of information bits with an encoder.

30. The first device of claim 29, wherein the phase of the transmitted signal in the determined one resource unit is the same in each of the plurality of predetermined subsets of resource units and is generated from at least one of a first identifier of the first device, a second identifier of the second device, and an identifier of the peer-to-peer connection between the first and the second devices.

31. The first device of claim 29, wherein the processing circuit is adapted to:

generate a plurality of phases as a function of a predetermined sequence, wherein the phase of the transmitted signal in the determined one resource unit in each of the plurality of predetermined subsets of resource units is equal to one of the generated plurality of phases.

32. The first device of claim 31, wherein the predetermined sequence is generated from at least one of a first identifier of the first device, a second identifier of the second device, and an identifier of the peer-to-peer connection between the first and the second devices.

33. The first device of claim 29, wherein the processing circuit is adapted to:

generate a plurality of power values as a function of a predetermined sequence, wherein the power of the transmitted signal in the determined one resource unit in each of the plurality of predetermined subsets of resource units is equal to one of the generated plurality of power values.

34. A first device having a peer-to-peer connection with a second device to facilitate interference management of small packet transmissions within an ad hoc wireless network, comprising:

means for partitioning a set of resource units into a plurality of predetermined subsets of resource units;

means for determining one resource unit in each of the plurality of predetermined subsets of resource units as a function of a set of bits; and

means for transmitting a signal in the determined one resource unit in each of the plurality of predetermined subsets of resource units.

35. The first device of claim 34, wherein the phase of the transmitted signal in the determined one resource unit is the same in each of the plurality of predetermined subsets of resource units and is generated from at least one of a first identifier of the first device, a second identifier of the second device, and an identifier of the peer-to-peer connection between the first and the second devices.

36. The first device of claim 34, further comprising:

means for generating a plurality of phases as a function of a predetermined sequence, wherein the phase of the transmitted signal in the determined one resource unit in each of the plurality of predetermined subsets of resource units is equal to one of the generated plurality of phases.

37. The method of claim 36, wherein the predetermined sequence is generated from at least one of a first identifier of the first device, a second identifier of the second device, and an identifier of the peer-to-peer connection between the first and the second devices.

38. The method of claim 34, further comprising:

means for generating a plurality of power values as a function of a predetermined sequence, wherein the power of the transmitted signal in the determined one resource unit in each of the plurality of predetermined subsets of resource units is equal to one of the generated plurality of power values.

39. A circuit for facilitating communications over a peer-to-peer network, wherein the circuit operates in a first device having a peer-to-peer connection with a second device to facilitate interference management of small packet transmissions within an ad hoc wireless network, wherein the circuit is adapted to:

partition a set of resource units into a plurality of predetermined subsets of resource units;

determine one resource unit in each of the plurality of predetermined subsets of resource units as a function of a set of bits; and

transmit a signal in the determined one resource unit in each of the plurality of predetermined subsets of resource units.

40. A machine-readable medium comprising instructions for a first device having a peer-to-peer connection with a second device to facilitate interference management of small packet transmissions within an ad hoc wireless network, which when executed by a processor causes the processor to:

partition a set of resource units into a plurality of predetermined subsets of resource units;

determine one resource unit in each of the plurality of predetermined subsets of resource units as a function of a set of bits; and

transmit a signal in the determined one resource unit in each of the plurality of predetermined subsets of resource units.