Methods and arrangements for communications in low power wireless networks

Patent metadata

Field	Value
Publication number	US-9357437-B2
Application number	US-201113977699-A
Country	US
Kind code	B2
Filing date	Dec 30, 2011
Priority date	Apr 28, 2011
Publication date	May 31, 2016
Grant date	May 31, 2016

Abstract

Embodiments may comprise an orthogonal frequency division multiplexing (OFDM) system operating in the 1 GHz and lower frequency bands. In many embodiments, the physical layer logic may implement repetition logic to repeat portions of the data streams to increase the ability of a receiving device to detect and decode the data streams. In some embodiments, the repetition logic may comprise a preamble repeater to repeat the training and/or signal fields. In further embodiments, the repetition logic may comprise a payload repeater to repeat the payload one or more times. Other embodiments comprise a receiving device comprising a correlator to correlate the repeated preamble symbols to detect a communication from a transmitting device. The receiving device may also comprise correction logic to correct data streams from the communications signal based upon repetitions of the payload in the data streams.

First claim

What is claimed is:

1. A device usable to facilitate, at least in part, wireless communication, the device comprising:
logic that comprises hardware, the logic to generate, at least in part, a preamble of a protocol data unit usable in the wireless communication, the protocol data unit to comprise the preamble and data;
the preamble comprising a repeated short training field;
the preamble also comprising a repeated long training field to follow the repeated short training field;
the preamble further comprising one or more signal fields that follow the repeated short training field;
the wireless communication, when in operation, to have a bandwidth of 1 megahertz and to use orthogonal frequency division multiplexing;
the repeated short training field comprising two short training field repetitions;
the repeated long training field comprising two long training field repetitions;
each of the two repeated short training field repetitions and each of the two repeated long training field repetitions comprising a respective plurality of symbols;
the two repeated short training field repetitions and the two repeated long training field repetitions to permit detection at the bandwidth of 1 megahertz;
wherein:
at the 1 megahertz bandwidth of the wireless communication, the repeated short training field and the repeated long training field, as transmitted, are to have first respective durations;
at another bandwidth of the wireless communication that is greater by a factor of N compared to the 1 megahertz bandwidth, the repeated short training field and the repeated long training field are to have other respective durations that are decreased compared to first respective durations by the factor of N.

2. The device of claim 1 , wherein:
the protocol data unit is a physical layer protocol data unit and is to be modulated using:
binary phase shift keying; or
quadrature phase shift keying.

3. The device of claim 1 , wherein:
the logic is comprised, at least in part, in an integrated circuit chip;
the device comprises a sensor to collect data;
the device is to transmit the data to a data collector.

4. The device of claim 3 , wherein:
the data is related to health care-related monitoring.

5. The device of claim 3 , wherein:
the data is related to usage of one or more services; and
the data collector comprises a usage meter substation.

6. The device of claim 1 , wherein:
the data is to be comprised in a payload that is to be repeated in the wireless communication.

7. The device of claim 1 , wherein:
the device further comprises:
at least one antenna; and
at least one memory;
a radio frequency transmitter; and

the at least one memory is to store machine-executable instructions that, when executed by a machine, result in generation of the preamble and the data.

8. An apparatus usable in wireless communication, the apparatus comprising:
a receiver to receive a preamble of a protocol data unit in the wireless communication, the protocol data unit, as received, comprising the preamble and data;
the preamble comprising a repeated short training field;
the preamble also comprising a repeated long training field to follow the repeated short training field;
the preamble further comprising one or more signal fields that follow the repeated short training field;
the wireless communication, when in operation, to have a bandwidth of 1 megahertz and to use orthogonal frequency division multiplexing;
the repeated short training field comprising two short training field repetitions;
the repeated long training field comprising two long training field repetitions;
each of the two repeated short training field repetitions and each of the two repeated long training field repetitions comprising a respective plurality of symbols;
the two repeated short training field repetitions and the two repeated long training field repetitions to permit detection at the bandwidth of 1 megahertz;
wherein:
at the 1 megahertz bandwidth of the wireless communication, the repeated short training field and the repeated long training field, as received, have first respective durations;
at another bandwidth of the wireless communication that is greater by a factor of N compared to the 1 megahertz bandwidth, the repeated short training field and the repeated long training field have other respective durations that are decreased compared to first respective durations by the factor of N.

9. The apparatus of claim 8 , wherein:
the protocol data unit is a physical layer protocol data unit and is modulated using:
binary phase shift keying; or
quadrature phase shift keying.

10. The apparatus of claim 8 , wherein:
the receiver is comprised, at least in part, in an integrated circuit chip; and
the receiver is to be comprised in a data collector.

11. The apparatus of claim 10 , wherein:
the data is related to health care-related monitoring.

12. The apparatus of claim 10 , wherein:
the data is related to usage of one or more services; and
the data collector comprises a usage meter substation.

13. The apparatus of claim 8 , wherein:
the data is to be comprised in a payload that is to be repeated in the wireless communication.

14. The apparatus of claim 8 , wherein:
the apparatus further comprises:
at least one antenna; and
at least one memory; and

the receiver is a radio frequency receiver; and
the at least one memory is to store machine-executable instructions that, when executed by a machine, result in decoding of the preamble and the data.

15. At least one non-transitory memory storing machine-executable instructions that, when executed by a machine, result in operations comprising:
generating, at least in part, a preamble of a protocol data unit usable in wireless communication, the protocol data unit to comprise the preamble and data;
the preamble comprising a repeated short training field;
the preamble also comprising a repeated long training field to follow the repeated short training field;
the preamble further comprising one or more signal fields that follow the repeated short training field;
the wireless communication, when in operation, to have a bandwidth of 1 megahertz and to use orthogonal frequency division multiplexing;
the repeated short training field comprising two short training field repetitions;
the repeated long training field comprising two long training field repetitions;
each of the two repeated short training field repetitions and each of the two repeated long training field repetitions comprising a respective plurality of symbols;
the two repeated short training field repetitions and the two repeated long training field repetitions to permit detection at the bandwidth of 1 megahertz;
wherein:
at the 1 megahertz bandwidth of the wireless communication, the repeated short training field and the repeated long training field, as transmitted, are to have first respective durations;
at another bandwidth of the wireless communication that is greater by a factor of N compared to the 1 megahertz bandwidth, the repeated short training field and the repeated long training field are to have other respective durations that are decreased compared to first respective durations by the factor of N.

16. The at least one memory of claim 15 , wherein:
the protocol data unit is a physical layer protocol data unit and is to be modulated using:
binary phase shift keying; or
quadrature phase shift keying.

17. The at least one memory of claim 15 , wherein:
the data is to be collected by a sensor; and
the data is to be

Assignees

• Kenney Thomas J
• Perahia Eldad
• Intel Corp

Inventors

• Kenney Thomas J
• Perahia Eldad

Classifications

• H04B7/0617

  for beam forming · CPC title

• H04L27/2643

  using symbol repetition, e.g. time domain realization of distributed FDMA · CPC title

• H04L27/2601

  Multicarrier modulation systems · CPC title

• H04W28/065 Primary

  using assembly or disassembly of packets · CPC title

• H04L27/2613

  Structure of the reference signals · CPC title