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

• US 9,154,363 B2
• Filed: 05/08/2012
• Issued: 10/06/2015
• Est. Priority Date: 05/13/2011
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Vermani, Sameer, Abraham, Santosh P., Taghavi Nasrabadi, Mohammad Hossein, Jones, Vincent K., Sampath, Hemanth
• Primary Examiner(s): Wong, Warner
• Application Number:
  US13/466,971
• Publication Number:
  US 20130128806A1
• Time in Patent Office: 1,246 Days
• Field of Search: 370/252, 370/328, 370/338, 370464-465
• US Class Current: 1/1
• CPC Class Codes: H04L 1/0028 Formatting
• CPC Class Codes: H04L 1/0033 arrangements specific to the transmitter
• 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 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]

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 wirelessly receive data packets having at least two formats, the receiver comprising a first detector configured to detect data packets of at least one of the two formats and a second detector configured to detect data packets of another of the two formats, the first detector and second detector operating in parallel; and

a processor configured to process a received data packet based at least in part on whether the received data packet was detected by the first detector or the second detector, the data packets of the at least one format and the data packets of the another format each comprising a signal field comprising a number of signal field symbols, the signal field of the at least one format being longer than the signal field of the another format, the data packets of the at least one format and the data packets of the another format each further comprising one or more training fields comprising a number of training field symbols, the number of signal field symbols of the signal field of the at least one format being greater than the number of signal field symbols of the signal field of the another format, and the number of training field symbols of the one or more training fields of the at least one format being greater than the number of training field symbols of the one or more training fields of the another format, and the signal field of the at least one format comprising a plurality of bits that is repeated four times.

2. The apparatus of claim 1, wherein the one or more training fields of each of the formats includes a first training field.

3. The apparatus of claim 2, wherein the first detector is configured to detect packets of the at least one format based at least in part on the first training field of the at least one format, and wherein the second detector is configured to detect packets of the another format based at least in part on the first training field of the another format.

4. The apparatus of claim 1, wherein the number of training field symbols of the at least one format are flipped with respect to the number of training field symbols of the another format.

5. The apparatus of claim 1, wherein data packets of one of the two formats include an extension field which comprises information for advanced features.

6. The apparatus of claim 5, 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.

7. An apparatus for wireless communication, comprising:

a receiver configured to wirelessly receive data packets having at least two formats, the receiver comprising a first detector configured to detect data packets of at least one of the two formats and a second detector configured to detect data packets of another of the two formats; and

a processor configured to process a received data packet based at least in part on whether the received data packet was detected by the first detector or the second detector, the data packets of the at least one format and the data packets of the another format each comprising a signal field comprising a number of signal field symbols, the signal field of the at least one format being longer than the signal field of the another format, the data packets of the at least one format and the data packets of the another format each further comprising one or more training fields comprising a number of training field symbols, the number of signal field symbols of the signal field of the at least one format being greater than the number of signal field symbols of the signal field of the another format, and the number of training field symbols of the one or more training fields of the at least one format being greater than the number of training field symbols of the one or more training fields of the another format, and the signal field of the at least one format comprising a plurality of bits that is repeated four times.

8. The apparatus of claim 7, wherein the plurality of bits comprises nineteen bits.

9. An apparatus for wireless communication, comprising:

a receiver configured to wirelessly receive data packets having at least two formats, the receiver comprising a first detector configured to detect data packets of at least one of the two formats and a second detector configured to detect data packets of another of the two formats; and

a processor configured to process a received data packet based at least in part on whether the received data packet was detected by the first detector or the second detector, the data packets of the another format each including a payload and a preamble comprising a first 2-symbol training field, a second 2-symbol training field, and a 2-symbol signal field, and the data packets of the at least one format each including a payload and a preamble comprising a first 4-symbol training field, a second 4-symbol training field, and a 5-symbol or 6-symbol signal field.

10. A method of wireless communication, comprising:

wirelessly receiving a data packet having one of at least two formats;

detecting a format of the received data packet using one of at least two detectors configured to detect respective data packet formats, the at least two detectors operating in parallel; and

processing the received data packet based on the detected format, data packets having a first format of the two formats and data packets having a second format of the at least two formats each comprising a signal field comprising a number of signal field symbols, the signal field of the first format being longer than the signal field of the second format, the data packets of the at least one format and the data packets of the another format each further comprising one or more training fields comprising a number of training field symbols, the number of signal field symbols of the signal field of the at least one format being greater than the number of signal field symbols of the signal field of the another format, and the number of training field symbols of the one or more training fields of the at least one format being greater than the number of training field symbols of the one or more training fields of the another format, and the signal field of the first format comprising a plurality of bits that is repeated four times.

11. The method of claim 10, wherein the one or more training fields of each of the formats comprises includes a first training field.

12. The method of claim 11, wherein a first of the two detectors is configured to detect packets of the first format based at least in part on the first training field of the at least one format, and wherein a second of the two detectors is configured to detect packets of the second format based at least in part on the first training field of the another format.

13. The method of claim 10, wherein the number of training field symbols of the at least one format are flipped with respect to the number of training field symbols of the another format.

14. The method of claim 10, wherein data packets of one of the two formats include an extension field which comprises information for advanced features.

15. The method of claim 14, 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.

16. A method of wireless communication, comprising:

wirelessly receiving a data packet having one of at least two formats;

detecting a format of the received data packet using one of at least two detectors configured to detect respective data packet formats; and

processing the received data packet based on the detected format, data packets having a first format of the two formats and data packets having a second format of the at least two formats each comprising a signal field comprising a number of signal field symbols, the signal field of the at least one format being longer than the signal field of the another format, the data packets of the at least one format and the data packets of the another format each further comprising one or more training fields comprising a number of training field symbols, the number of signal field symbols of the signal field of the at least one format being greater than the number of signal field symbols of the signal field of the another format, and the number of training field symbols of the one or more training fields of the at least one format being greater than the number of training field symbols of the one or more training fields of the another format, and the signal field of the first format comprising a plurality of bits that is repeated four times.

17. The method of claim 16, wherein the plurality of bits comprises nineteen bits.

18. A method of wireless communication, comprising:

wirelessly receiving a data packet having one of at least two formats;

detecting a format of the received data packet using one of at least two detectors configured to detect respective data packet formats; and

processing the received data packet based on the detected format, the data packets of a second format each including a payload and a preamble comprising a first 2-symbol training field, a second 2-symbol training field, and a 2-symbol signal field, and the data packets of a first format each including a payload and a preamble comprising a first 4-symbol training field, a second 4-symbol training field, and a 5-symbol or 6-symbol signal field.

19. An apparatus for wireless communication, comprising:

means for wirelessly receiving a data packet having one of at least two formats;

first means for detecting whether the received data packet has a first format;

second means for detecting whether the received data packet has a second format, the first and second means occurring in parallel; and

means for processing the received data packet based on the first detecting means and the second detecting means, the data packet of the first format and the data packet of the second format each comprising a signal field comprising a number of signal field symbols, the signal field of the at least one format being longer than the signal field of the another format, the data packets of the at least one format and the data packets of the another format each further comprising one or more training fields comprising a number of training field symbols, the number of signal field symbols of the signal field of the at least one format being greater than the number of signal field symbols of the signal field of the another format, and the number of training field symbols of the one or more training fields of the at least one format being greater than the number of training field symbols of the one or more training fields of the another format, and the signal field of the at least one format comprising a plurality of bits that is repeated four times.

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

wirelessly receive a data packet having one of at least two formats;

detect a format of the received data packet using one of at least two detectors configured to detect data packets of at least one of the two formats and another of the two formats, the at least two detectors operating in parallel; and

process the received data packet based on the detected format, the data packets of the at least one format and the data packets of the another format each comprising a signal field comprising a number of signal field symbols, the signal field of the at least one format being longer than the signal field of the another format, the data packets of the at least one format and the data packets of the another format each further comprising one or more training fields comprising a number of training field symbols, the number of signal field symbols of the signal field of the at least one format being greater than the number of signal field symbols of the signal field of the another format, and the number of training field symbols of the one or more training fields of the at least one format being greater than the number of training field symbols of the one or more training fields of the another format, and the signal field of the at least one format comprising a plurality of bits that is repeated four times.

21. An apparatus for wireless communication, comprising:

a processor configured to select a data packet format from at least two data packet formats comprising a training field comprising a number of training field symbols, the at least two data packet formats further comprising a signal field comprising a number of signal field symbols, the training field of one of the data packet formats including a sequence repeated a greater number of times than in the training field of another of the data packet formats, the number of signal field symbols of the signal field of the one format being greater than the number of signal field symbols of the signal field of the another format, and the number of training field symbols of the one or more training fields of the one format being greater than the number of training field symbols of the one or more training fields of the another format, and the signal field of the one format comprising a plurality of bits that is repeated four times; and

a transmitter configured to transmit a wireless communication using the selected data packet format.

22. The apparatus of claim 21, wherein the one or more training fields of each of the formats includes a first training field.

23. The apparatus of claim 21, wherein a portion of the one or more training fields of the one format is flipped with respect to a portion of the one or more training fields of the another format.

24. The apparatus of claim 21, wherein the plurality of bits comprises nineteen bits.

25. The apparatus of claim 21, wherein the data packets of the another format each include a payload and a preamble comprising a first 2-symbol training field, a second 2-symbol training field, and a 2-symbol signal field, and the data packets of the one format each include a payload and a preamble comprising a first 4-symbol training field, a second 4-symbol training field, and a 5-symbol or 6-symbol signal field.

26. The apparatus of claim 21, wherein data packets of one of the two formats include an extension field which comprises information for advanced features.

27. The apparatus of claim 26, 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.

28. A method of wireless communication, comprising:

selecting a data packet format from at least two data packet formats comprising a training field comprising a number of training field symbols, the at least two data packet formats further comprising a signal field comprising a number of signal field symbols, the training field of one of the data packet formats including a sequence repeated a greater number of times than in the training field of another of the data packet formats, the number of signal field symbols of the signal field of the one format being greater than the number of signal field symbols of the signal field of the another format, and the number of training field symbols of the one or more training fields of the one format being greater than the number of training field symbols of the one or more training fields of the another format, and the signal field of the one format comprising a plurality of bits that is repeated four times; and

transmitting a wireless communication using the selected data packet format.

29. The method of claim 28, wherein the one or more training fields of each of the formats includes a first training field.

30. The method of claim 28, wherein a portion of the one or more training fields of the one format is flipped with respect to a portion of the one or more training fields of the another format.

31. The method of claim 28, wherein the plurality of bits comprises nineteen bits.

32. The method of claim 28, wherein the data packets of the another format each include a payload and a preamble comprising a first 2-symbol training field, a second 2-symbol training field, and a 2-symbol signal field, and the data packets of the one format each include a payload and a preamble comprising a first 4-symbol training field, a second 4-symbol training field, and a 5-symbol or 6-symbol signal field.

33. The method of claim 28, wherein data packets of one of the two formats include an extension field which comprises information for advanced features.

34. The method of claim 33, 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.

35. An apparatus for wireless communication, comprising:

means for selecting a data packet format from at least two data packet formats comprising a training field comprising a number of training field symbols, the at least two data packet formats further comprising a signal field comprising a number of signal field symbols, the training field of one of the data packet formats including a sequence repeated a greater number of times than in the training field of another of the data packet formats, the number of signal field symbols of the signal field of the one format being greater than the number of signal field symbols of the signal field of the another format, and the number of training field symbols of the one or more training fields of the one format being greater than the number of training field symbols of the one or more training fields of the another format, and the signal field of the one format comprising a plurality of bits that is repeated four times; and

means for transmitting a wireless communication using the selected data packet format.

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

select a data packet format from at least two data packet formats comprising a training field comprising a number of training field symbols, the at least two data packet formats further comprising a signal field comprising a number of signal field symbols, the training field of one of the data packet formats including a sequence repeated a greater number of times than in the training field of another of the data packet formats, the number of signal field symbols of the signal field of the one format being greater than the number of signal field symbols of the signal field of the another format, and the number of training field symbols of the one or more training fields of the one format being greater than the number of training field symbols of the one or more training fields of the another format, and the signal field of the one format comprising a plurality of bits that is repeated four times; and

transmit a wireless communication using the selected data packet format.