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