FRAME FORMATS FOR CHANNEL BONDING AND MIMO TRANSMISSIONS

• US 20160164800A1
• Filed: 12/08/2015
• Published: 06/09/2016
• Est. Priority Date: 12/09/2014
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: EITAN, Alecsander Petru, Sanderovich, Amichai
• Granted Patent: US 10,044,635 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 25/0202 Channel estimation
• CPC Class Codes: H04L 25/0204 of multiple channels
• CPC Class Codes: H04L 25/0224 using sounding signals
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/2603 Signal structure ensuring backward compatibility with legacy system
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 47/80 Actions related to the user profile or the type of traffic
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames

Abstract

Certain aspects of the present disclosure provide methods and apparatus for preamble structures for transmissions sent using channel bonding (across multiple channels) and/or MIMO (with two or more spatial streams).

Claims

1. An apparatus for wireless communications, comprising:

a processing system configured to generate a frame for transmission on at least one channel, the frame having;

a preamble portion comprising

first information comprising at least one training field detectable by other apparatuses, the first information to be transmitted on a set of one or more sub-channels, each sub-channel comprising a fractional portion of a full bandwidth of the at least one channel, and

second information comprising at least one of channel estimation or header information, the second information to be transmitted using the full bandwidth of the at least one channel, and

a data portion to be transmitted using the full bandwidth of the at least one channel; and

an interface for outputting the frame for transmission.

2. The apparatus of claim 1, wherein:

the at least one channel comprises at least a first channel for transmitting at least first and second spatial streams; and

the at least one training field comprises at least a first training field for the first spatial stream to be transmitted on a first set of one or more sub-channels of the first channel, and at least a second training field for the second spatial stream to be transmitted on a second set of one or more sub-channels of the first channel, wherein the first and second sets of sub-channels are non-overlapping.

3. The apparatus of claim 2, wherein the second information comprises:

at least first channel estimation information for the first spatial stream to be transmitted using the full bandwidth of the first channel; and

at least second channel estimation information for the second spatial stream to be transmitted using the full bandwidth of the first channel.

4. The apparatus of claim 1, wherein:

the at least one channel comprises a set of channels assigned to the apparatus; and

the set of channels comprise at least two contiguous channels.

5. The apparatus of claim 1, wherein:

the at least one channel comprises a set of channels assigned to the apparatus;

the set of channels comprises at least first and second channels assigned to the apparatus;

the at least one training field comprises at least a first training field to be transmitted on a set of one or more sub-channels of the first channel and at least a second training field to be transmitted on a set of one or more sub-channels of the second channel, and

the second information comprises channel estimation information to be transmitted using combined bandwidth of the first and second channels.

6. The apparatus of claim 1, wherein:

the at least one channel comprises a set of channels assigned to the apparatus;

the set of channels comprises at least first and second channels for transmitting first and second spatial streams; and

the at least one training field comprises at least a first training field for the first spatial stream to be transmitted on a first set of one or more sub-channels of each of the first and second channels, and at least a second training field for the second spatial stream to be transmitted on a second set of one or more sub-channels of each of the first and second channels; and

the second information comprises channel estimation information to be transmitted using combined bandwidth of the first and second channels.

7. The apparatus of claim 6, wherein at least one of:

the first and second sets of one or more sub-channels are non-overlapping;

or

sub-channels used for the first and second spatial streams are non-overlapping.

8. The apparatus of claim 6, wherein the second information comprises:

at least first channel estimation information for the first spatial stream to be transmitted using combined bandwidth of the first and second channels; and

at least second channel estimation information for the second spatial stream to be transmitted using combined bandwidth of the first and second channels.

9. An apparatus for wireless communications, comprising:

an interface for obtaining, via at least one channel, a frame having;

a preamble portion comprising

first information comprising at least one training field detectable by other apparatuses, the first information received on a set of one or more sub-channels, each sub-channel comprising a fractional portion of a full bandwidth of the at least one channel,

second information comprising at least one of channel estimation or header information, the second information received using the full bandwidth of the at least one channel, and

a data portion transmitted using the full bandwidth of the at least one channel; and

a processing system configured to generate a channel estimate based, at least in part, on the second information, and to decode at least some of the data portion of the frame based on the channel estimate.

10. The apparatus of claim 9, wherein:

the at least one channel comprises at least a first channel for transmitting at least first and second spatial streams; and

the at least one training field comprises at least a first training field for the first spatial stream received on a first set of one or more sub-channels of the first channel, and at least a second training field for the second spatial stream received on a second set of one or more sub-channels of the first channel, wherein the first and second sets of sub-channels are non-overlapping.

11. The apparatus of claim 10, wherein the second information comprises:

at least first channel estimation information for the first spatial stream received using the full bandwidth of the first channel; and

at least second channel estimation information for the second spatial stream received using the full bandwidth of the first channel.

12. The apparatus of claim 9, wherein:

the at least one channel comprises a set of channels assigned to the apparatus;

the set of channels comprises at least first and second channels assigned to the apparatus;

the at least one training field comprises at least a first training field received on a set of one or more sub-channels of the first channel and at least a second training field received on a set of one or more sub-channels of the second channel, and

the second information comprises channel estimation information received using combined bandwidth of the first and second channels.

13. The apparatus of claim 12, wherein:

the set of channels comprises at least first and second channels for transmitting first and second spatial streams; and

the at least one training field comprises at least a first training field for the first spatial stream to received on a first set of one or more sub-channels of each of the first and second channels, and at least a second training field for the second spatial stream received on a second set of one or more sub-channels of each of the first and second channels; and

the second information comprises channel estimation information received using combined bandwidth of the first and second channels.

14. The apparatus of claim 12, wherein the second information comprises:

at least first channel estimation information for the first spatial stream received using combined bandwidth of the first and second channels; and

at least second channel estimation information for the second spatial stream received using combined bandwidth of the first and second channels.

15. An apparatus for wireless communications, comprising:

a processing system configured to generate a frame for transmission on at least one channel, the frame having;

first information comprising at least one of a training field, channel estimation, or header information for processing by first and second types of devices, and extended header information intended for processing by only a second type of device that is a targeted recipient of the frame, and

a data portion; and

an interface for outputting the frame for transmission via the at least one channel.

16. The apparatus of claim 15, wherein:

the frame further comprises, for each of first and second spatial streams, second information comprising at least one of a training field or channel estimation information for processing by the targeted recipient of the frame; and

wherein the second information for the first spatial stream is output for transmission with a delay relative to transmission of an end of the first information for the first spatial stream in order to time align the second information for the first spatial stream with the second information for the second spatial stream.

17. The apparatus of claim 15, wherein:

the at least one channel comprises a set of channels assigned to the apparatus; and

the data portion is to be transmitted on bandwidth spanning the set of channels.

18. The apparatus of claim 15, wherein:

the at least one channel comprises a set of channels assigned to the apparatus;

the set of channels comprises at least first and second contiguous channels;

the first information is repeated in each of the first and second channels; and

the frame further comprises second information comprising at least one of a training field or channel estimation information for processing by the targeted recipient of the frame, wherein the second information is to be output for transmission on bandwidth spanning the at least first and second channels.

19. The apparatus of claim 18, wherein:

the first and second channels are for transmitting at least first and second spatial streams; and

the first information comprises first information for the first spatial stream repeated in each of the first and second channels and first information for the second spatial stream repeated in each of the first and second channels,

wherein the first information for the second spatial stream is output for transmission with a delay relative to transmission of the first information for the first spatial stream.

20. The apparatus of claim 19, wherein:

the second information for the first spatial stream is output for transmission with a delay relative to transmission of an end of the first information for the first spatial stream in order to time align the second information for the first spatial stream with the second information for the second spatial stream.

21. An apparatus for wireless communications, comprising:

an interface for obtaining a frame transmitted on at least one channel, the frame having;

first information for processing by first and second types of devices, and header information intended for processing by only a second type of device that is a targeted recipient of the frame, and

a data portion;

a processing system configured to process the first information and to decode at least some of the data portion of the frame based on the extended header information.

22. The apparatus of claim 21, wherein:

the at least one channel comprises at least a single channel for transmitting at least first and second spatial streams; and

the first information comprises first information for the first spatial stream and first information for the second spatial stream transmitted on the same single channel,

wherein reception of the first information for the second spatial stream by the apparatus is delayed relative to transmission of the first information for the first spatial stream.

23. The apparatus of claim 21, wherein:

the at least one channel comprises a set of channels assigned to the apparatus; and

the data portion is received on bandwidth spanning the set of channels.

24. The apparatus of claim 21, wherein:

the at least one channel comprises a set of channels assigned to the apparatus;

the set of channels comprises at least first and second contiguous channels;

the first information is repeated in each of the first and second channels; and

the frame further comprises second information comprising at least one of a training field or channel estimation information for processing by the targeted recipient of the frame, wherein the second information is received on bandwidth spanning the at least first and second channels.

25. The apparatus of claim 24, wherein:

the first and second channels are for obtaining at least first and second spatial streams; and

the first information comprises first information for the first spatial stream repeated in each of the first and second channels and first information for the second spatial stream repeated in each of the first and second channels,

wherein reception of the first information for the second spatial stream by the apparatus is delayed relative to transmission of the first information for the first spatial stream.

26-83. -83. (canceled)