Systems and methods for wireless communication of packets having a plurality of formats

• US 8,934,413 B2
• Filed: 05/08/2012
• Issued: 01/13/2015
• Est. Priority Date: 05/13/2011
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Vermani, Sameer, Abraham, Santosh P., Taghavi Nasrabadi, Mohammad Hossein, Jones, Vincent K. IV, Sampath, Hemanth
• Primary Examiner(s): Moore, Ian N
• Assistant Examiner(s): Smith, Eric P
• Application Number:
  US13/466,978
• Publication Number:
  US 20130121244A1
• Time in Patent Office: 980 Days
• Field of Search: None
• US Class Current: 370/328
• CPC Class Codes: H04L 1/0029 Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling power control H04W52/04
• CPC Class Codes: H04L 1/0039 other detection of signalling, e.g. detection of TFCI explicit signalling H04L1/0046, H04L27/0012 and H04L25/0262 take precedence
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 27/26132 using repetition
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers

Abstract

Systems and methods for communicating packets having a plurality of formats are described herein. In some aspects, a signal (SIG) field in the preamble of a packet may indicate whether an extension field, such as an extension SIG field or SIG-B field, is included in the packet. In another aspect, one or more detectors may be used to auto-detect packets formatted as one of at least two different formats based on a short training field (STF) of a received packet. In some aspects, along training field (LTF) in the preamble of a packet may indicate whether the payload is repetition coded.

Claims

1. An apparatus for wireless communication, comprising:

a receiver configured to receive at least a physical layer preamble of a wireless communication, the preamble including a first field indicating whether the preamble includes an extension field, the first field comprising a signal field, a rotation of a modulation of the signal field indicating whether the extension field is included, and a field in the preamble indicating a length of a payload or of the payload and the preamble in bytes or in symbols; and

a processor configured to abort reception of a remainder of the communication when the first field indicates that the preamble includes the extension field.

2. The apparatus of claim 1, wherein the preamble comprises a first training field, the signal field comprises a 4-symbol signal field, and the first field comprises a 4-symbol second training field.

3. The apparatus of claim 2, wherein the signal field includes a length sub-field comprising 9 bits, a modulation and coding scheme sub-field comprising 4 bits, a short guard interval sub-field comprising 1 bit, a parity bit, 3 reserved bits, and a 6-bit tail field.

4. The apparatus of claim 2, wherein the signal field includes a length sub-field comprising 9 bits, a modulation and coding scheme sub-field comprising 4 bits, a short guard interval sub-field comprising 1 bit, a parity bit, 2 reserved bits, a 1-bit Doppler/midamble sub-field, and a 6-bit tail field.

5. The apparatus of claim 2, wherein the signal field includes a length sub-field comprising 9 bits, a modulation and coding scheme sub-field comprising 4 bits, a short guard interval sub-field comprising 1 bit, a 4-bit cyclic redundancy check sub-field, and a 6-bit tail field.

6. The apparatus of claim 2, wherein the second training field includes information which indicates whether the preamble includes the extension field.

7. The apparatus of claim 6, wherein a symbol rotation of the second training field or a portion of the second training field indicates whether the extension field is included.

8. The apparatus of claim 7, wherein rotations of the last two symbols of the second training field indicate whether the extension field is included.

9. The apparatus of claim 2, wherein the signal field includes information for sensor traffic having payloads up to 511 bytes, and includes information for deferral.

10. The apparatus of claim 2, wherein the signal field includes a length sub-field comprising 9 bits, a modulation and coding scheme sub-field comprising 4 bits, a Doppler/midamble sub-field comprising 1 bit, a parity bit, 3 reserved bits, and a 6-bit tail field and the extension field includes a 2-bit SS sub-field, a 1-bit short guard interval sub-field, a 2 bit coding sub-field, a 5-bit partial association identifier sub-field, a 1-bit space time block coding sub-field, 1 parity bit, and 6 tail bits.

11. The apparatus of claim 1, wherein the extension field includes information for advanced features.

12. The apparatus of claim 11, wherein the advanced features include at least one of open loop multiple input multiple output transmission, low-density parity-check, single-user multiple input multiple output, use of a midamble, use of space time block coding, and use of partial association identifier.

13. The apparatus of claim 1, wherein the extension field includes information for the payload, and the payload is greater than 511 bytes.

14. The apparatus of claim 1, wherein the extension field includes three symbols.

15. The apparatus of claim 1, wherein the extension field includes a 2-bit SS sub-field, a 1-bit Doppler/midamble sub-field, a 2 bit coding sub-field, a 5-bit partial association identifier sub-field, a 1-bit space time block coding sub-field, 1 parity bit, and 6 tail bits.

16. The apparatus of claim 1, wherein the extension field includes four symbols.

17. The apparatus of claim 16, wherein the extension field includes reserved bits or more than 5 partial association identifier bits.

18. The apparatus of claim 1, wherein inclusion of the extension field indicates that aggregation is to be enforced.

19. A method of wireless communication, comprising:

receiving at least a physical layer preamble of a wireless communication, the preamble including a first field indicating whether the preamble includes an extension field, the first field comprising a signal field, a rotation of a modulation of the signal field indicating whether the extension field is included, and a field in the preamble indicating a length of a payload or of the payload and the preamble in bytes or in symbols; and

aborting reception of a remainder of the communication when the first field indicates that the preamble includes the extension field.

20. The method of claim 19, wherein the preamble comprises a first training field, the signal field comprises a 4-symbol signal field, and the first field comprises a 4-symbol second training field.

21. The method of claim 20, wherein the signal field includes a length sub-field comprising 9 bits, a modulation and coding scheme sub-field comprising 4 bits, a short guard interval sub-field comprising 1 bit, a parity bit, 3 reserved bits, and a 6-bit tail field.

22. The method of claim 20, wherein the signal field includes a length sub-field comprising 9 bits, a modulation and coding scheme sub-field comprising 4 bits, a short guard interval sub-field comprising 1 bit, a parity bit, 2 reserved bits, a 1-bit Doppler/midamble sub-field, and a 6-bit tail field.

23. The method of claim 20, wherein the signal field includes a length sub-field comprising 9 bits, a modulation and coding scheme sub-field comprising 4 bits, a short guard interval sub-field comprising 1 bit, a 4-bit cyclic redundancy check sub-field, and a 6-bit tail field.

24. The method of claim 20, wherein the second training field includes information which indicates whether the preamble includes the extension field.

25. The method of claim 24, wherein a symbol rotation of the second training field or a portion of the second training field indicates whether the extension field is included.

26. The method of claim 25, wherein rotations of the last two symbols of the second training field indicate whether the extension field is included.

27. The method of claim 20, wherein the signal field includes information for sensor traffic having payloads up to 511 bytes, and includes information for deferral.

28. The method of claim 20, wherein the signal field includes a length sub-field comprising 9 bits, a modulation and coding scheme sub-field comprising 4 bits, a Doppler/midamble sub-field comprising 1 bit, a parity bit, 3 reserved bits, and a 6-bit tail field and the extension field includes a 2-bit SS sub-field, a 1-bit short guard interval sub-field, a 2 bit coding sub-field, a 5-bit partial association identifier sub-field, a 1-bit space time block coding sub-field, 1 parity bit, and 6 tail bits.

29. The method of claim 19, wherein the extension field includes information for advanced features.

30. The method of claim 29, wherein the advanced features include at least one of open loop multiple input multiple output transmission, low-density parity-check, single-user multiple input multiple output, use of a midamble, use of space time block coding, and use of partial association identifier.

31. The method of claim 19, wherein the extension field includes information for the payload, and the payload is greater than 511 bytes.

32. The method of claim 19, wherein the extension field includes three symbols.

33. The method of claim 19, wherein the extension field includes a 2-bit SS sub-field, a 1-bit Doppler/midamble sub-field, a 2 bit coding sub-field, a 5-bit partial association identifier sub-field, a 1-bit space time block coding sub-field, 1 parity bit, and 6 tail bits.

34. The method of claim 19, wherein the extension field includes four symbols.

35. The method of claim 34, wherein the extension field includes reserved bits or more than 5 partial association identifier bits.

36. The method of claim 19, wherein inclusion of the extension field indicates that aggregation is to be enforced.

37. An apparatus for wireless communication, comprising:

means for receiving at least a physical layer preamble of a wireless communication, the preamble including a first field indicating whether the preamble includes an extension field, the first field comprising a signal field, a rotation of a modulation of the signal field indicating whether the extension field is included, and a field in the preamble indicating a length of a payload or of the payload and the preamble in bytes or in symbols; and

means for aborting reception of a remainder of the communication when the first field indicates that the preamble includes the extension field.

38. A non-transitory computer readable medium comprising instructions that when executed cause an apparatus to:

receive at least a physical layer preamble of a wireless communication, the preamble including a first field indicating whether the preamble includes an extension field, the first field comprising a signal field, a rotation of a modulation of the signal field indicating whether the extension field is included, and a field in the preamble indicating a length of a payload or of the payload and the preamble in bytes or in symbols; and

abort reception of a remainder of the communication when the first field indicates that the preamble includes the extension field.