Methods and arrangements for low power wireless networks

• US 9,655,040 B2
• Filed: 02/17/2015
• Issued: 05/16/2017
• Est. Priority Date: 04/26/2011
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Kenney, Thomas J., Perahia, Eldad
• Primary Examiner(s): Han, Clemence
• Application Number:
  US14/624,366
• Publication Number:
  US 20150327166A1
• Time in Patent Office: 819 Days
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04W 52/02 Power saving arrangements in wired systems H04L12/12; signaling of mobile application services, e.g. low battery notifications H04W4/20
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Embodiments may comprise an orthogonal frequency division multiplexing (OFDM) system operating in the 1 GHz and lower frequency bands. In many embodiments, physical layer logic may implement a new preamble structure with a new signal field. Embodiments may store the preamble structure and/or a preamble based upon the new preamble structure on a machine-accessible medium. Some embodiments may generate and transmit a communication with the new preamble structure. Further embodiments may receive and detect communications with the new preamble structure.

Claims

1. An apparatus, comprising:

at least one memory; and

logic, at least a portion of which is in hardware, the logic to detect a preamble in a physical protocol data unit (PPDU), the PPDU to correspond to a below 1 GHz frequency band transmission, the PPDU to comprise a plurality of orthogonal frequency-division multiplexing (OFDM) symbols, the preamble to comprise a signal field comprising a bandwidth parameter to designate a bandwidth of the PPDU, the designated bandwidth to correspond to an Institute of Electrical and Electronics Engineers (IEEE) 802.11ac bandwidth reduced by a factor of 10, a data portion of the PPDU to be demodulated according to a first tone allocation that matches an IEEE 802.11ac tone allocation for the IEEE 802.11ac bandwidth, the first tone allocation to differ from a second tone allocation used for the preamble.

2. The apparatus of claim 1, the preamble to comprise an IEEE 802.11ac short training field (STF).

3. The apparatus of claim 1, the preamble to comprise an IEEE 802.11n short training field (STF).

4. The apparatus of claim 1, the preamble to comprise an IEEE 802.11ac long training field (LTF).

5. The apparatus of claim 1, the designated bandwidth to comprise one of:

2 MHz, 4 MHz, 8 MHz, and 16 MHz.

6. The apparatus of claim 1, the first tone allocation to comprise 52 data tones and 4 pilot tones.

7. The apparatus of claim 1, the first tone allocation to comprise 108 data tones and 6 pilot tones.

8. The apparatus of claim 1, the first tone allocation to comprise 234 data tones and 8 pilot tones.

9. The apparatus of claim 1, the first tone allocation to comprise 468 data tones and 16 pilot tones.

10. The apparatus of claim 1, the first tone allocation to comprise a greater number of data tones than the second tone allocation.

11. The apparatus of claim 1, the second tone allocation to comprise one or more replications of a tone allocation for a bandwidth lower than a bandwidth of the PPDU.

12. The apparatus of claim 1, the logic to detect a second preamble in a second PPDU to be received via the below 1 GHz frequency band, the second PPDU to comprise a 1 MHz bandwidth and to include a preamble comprising a second signal field indicating the 1 MHz bandwidth.

13. The apparatus of claim 1, comprising:

at least one processor; and

at least one radio frequency (RF) transceiver.

14. The apparatus of claim 13, comprising at least one RF antenna.

15. At least one non-transitory computer-readable storage medium comprising a set of instructions that, in response to being executed on a computing device, cause the computing device to:

detect a preamble in a physical protocol data unit (PPDU), the PPDU to correspond to a below 1 GHz frequency band transmission, the PPDU to comprise a plurality of orthogonal frequency-division multiplexing (OFDM) symbols, the preamble to comprise a signal field comprising a bandwidth parameter to designate a bandwidth of the PPDU, the designated bandwidth to correspond to a second bandwidth reduced by a factor of 10, a data portion of the PPDU to be received according to a first tone allocation that matches a tone allocation corresponding to the second bandwidth, the first tone allocation to differ from a second tone allocation used for the preamble.

16. The at least one non-transitory computer-readable storage medium of claim 15, the second bandwidth to comprise one of:

20 megahertz (MHz), 40 MHz, 80 MHz, and 160 MHz.

17. The at least one non-transitory computer-readable storage medium of claim 15, the preamble to comprise an Institute of Electrical and Electronics Engineers (IEEE) 802.11ac short training field (STF).

18. The at least one non-transitory computer-readable storage medium of claim 15, the preamble to comprise an Institute of Electrical and Electronics Engineers (IEEE) 802.11n short training field (STF).

19. The at least one non-transitory computer-readable storage medium of claim 15, the preamble to comprise an Institute of Electrical and Electronics Engineers (IEEE) 802.11ac long training field (LTF).

20. The at least one non-transitory computer-readable storage medium of claim 15, the first tone allocation to comprise 52 data tones and 4 pilot tones.

21. The at least one non-transitory computer-readable storage medium of claim 15, the first tone allocation to comprise 108 data tones and 6 pilot tones.

22. The at least one non-transitory computer-readable storage medium of claim 15, the first tone allocation to comprise 234 data tones and 8 pilot tones.

23. The at least one non-transitory computer-readable storage medium of claim 15, the first tone allocation to comprise 468 data tones and 16 pilot tones.

24. The at least one non-transitory computer-readable storage medium of claim 15, the first tone allocation to comprise a greater number of data tones than the second tone allocation.

25. The at least one non-transitory computer-readable storage medium of claim 15, the second tone allocation to comprise one or more replications of a tone allocation for a bandwidth lower than a bandwidth of the PPDU.

26. The at least one non-transitory computer-readable storage medium of claim 15, comprising instructions that, in response to being executed on the computing device, cause the computing device to detect a second preamble in a second PPDU to be received via the below 1 GHz frequency band, the second PPDU to comprise a 1 MHz bandwidth and to include a preamble comprising a second signal field indicating the 1 MHz bandwidth.