Mobility communication using mid-ambles

• US 10,419,186 B2
• Filed: 11/17/2017
• Issued: 09/17/2019
• Est. Priority Date: 11/20/2016
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Verma, Lochan, Vermani, Sameer, Tian, Bin
• Primary Examiner(s): Levitan, Dmitry
• Application Number:
  US15/816,560
• Publication Number:
  US 20180145812A1
• Time in Patent Office: 669 Days
• Field of Search: 370310, 370341, 370348, 370436, 370437, 370465
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 27/261 Details of reference signals
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04L 69/323 in the physical layer [OSI layer 1]
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

Various aspects of the disclosure relate to communication using a data unit that includes at least one mid-amble. In some aspects, an apparatus may use mid-ambles for mobility scenarios (e.g., when the apparatus is moving outdoors). The disclosure relates in some aspects to signaling associated with the use of mid-ambles. In some aspects, an apparatus may signal whether it supports sending and/or receiving data with mid-ambles. In some aspects, an apparatus may signal whether a particular data unit includes at least one mid-amble. In some aspects, an apparatus may signal an indication of at least one mid-amble update interval. In some aspects, an apparatus may signal whether a mid-amble includes a short training field.

Claims

1. An apparatus for communication, comprising:

a processing system configured to;

generate a physical layer protocol data unit (PPDU) for Wi-Fi communication comprising a plurality of mid-ambles, a Number of High Efficiency Long Training Field (HE-LTF) Symbols field, and a Doppler bit set to a value of 1, and

repurpose at least one bit of the Number of HE-LTF Symbols field to carry mid-amble update interval information; and

an interface configured to output the data unit for transmission.

2. The apparatus of claim 1, wherein the mid-amble update interval information specifies different mid-amble update intervals associated with different communication parameters.

3. The apparatus of claim 2, wherein the different communication parameters comprise at least one of:

different modulation and coding schemes (MCSs), different numbers of spatial streams, different bandwidth, or any combination thereof.

4. The apparatus of claim 1, wherein the mid-amble update interval information specifies ratios between different mid-amble update intervals.

5. The apparatus of claim 1, wherein:

the generation of the data unit comprises generating a packet including a preamble, wherein the preamble includes an IEEE 802.11 High Efficiency SIG-A (HE-SIG-A) field having the Number of HE-LTF Symbols field therein; and

the output of the data unit for transmission comprises output of the packet for transmission.

6. The apparatus of claim 1, wherein:

the generation of the data unit comprises generating a Trigger frame having the Number of HE-LTF Symbols field therein; and

the output of the data unit for transmission comprises output of the Trigger frame for transmission.

7. The apparatus of claim 6, wherein:

the Trigger frame includes a Common Information field; and

the Doppler bit is located in the Common Information field.

8. The apparatus of claim 1, wherein:

the generation of the data unit comprises generating a High Efficiency Multi User Physical Layer Convergence Protocol (PLCP) Protocol Data Unit (HE MU PPDU) including a preamble, the preamble including the Number of HE-LTF Symbols field therein; and

the output for the data unit for transmission comprises output of the HE MU PPDU for transmission.

9. The apparatus of claim 8, wherein:

the HE MU PPDU includes a High Efficiency SIG-A (HE-SIG-A) field; and

the Doppler bit is located in the HE-SIG-A field.

10. The apparatus of claim 1, wherein the mid-amble update interval information specifies:

a first mid-amble update interval associated with a first communication parameter; and

a second mid-amble update interval associated with a second communication parameter, wherein the first mid-amble update interval is different from the second mid-amble update interval and the first communication parameter is different from the second communication parameter.

11. The apparatus of claim 10, wherein:

the first communication parameter comprises a first numbers of spatial streams; and

the second communication parameter comprises a second number of spatial streams.

12. The apparatus of claim 10, wherein:

the first communication parameter comprises a first bandwidth; and

the second communication parameter comprises a second bandwidth.

13. A wireless node, comprising:

a processing system configured to;

generate a physical layer protocol data unit (PPDU) for Wi-Fi communication comprising a plurality of mid-ambles, a Number of High Efficiency Long Training Field (HE-LTF) Symbols field, and a Doppler bit set to a value of 1, and

repurpose at least one bit of the Number of HE-LTF Symbols field to carry mid-amble update interval information; and

a transmitter configured to transmit the data unit.

14. The wireless node of claim 13, wherein the mid-amble update interval information specifies:

a first mid-amble update interval for the wireless node; and

a second mid-amble update interval for another wireless node.

15. An apparatus for communication, comprising:

an interface configured to obtain a physical layer protocol data unit (PPDU) for Wi-Fi communication comprising a Number of High Efficiency Long Training Field (HE-LTF) Symbols field and a Doppler bit; and

a processing system configured to;

determine, based on the Doppler bit being set to a value of 1, that the Number of HE-LTF Symbols field is repurposed to carry mid-amble update interval information,

determine, based on the mid-amble update interval information, where mid-ambles are located in the data unit, and

perform channel estimation for a wireless communication channel based on the mid-ambles.

16. The apparatus of claim 15, wherein:

the obtaining of the data unit comprises obtaining a packet including a preamble, wherein the preamble includes an IEEE 802.11 High Efficiency SIG-A (HE-SIG-A) field having the Number of HE-LTF Symbols field therein.

17. The apparatus of claim 15, wherein:

the obtaining of the data unit comprises obtaining a Trigger frame having the Number of HE-LTF Symbols field therein.

18. The apparatus of claim 15, wherein:

the obtaining of the data unit comprises obtaining a High Efficiency Multi User Physical Layer Convergence Protocol (PLCP) Protocol Data Unit (HE MU PPDU) including a preamble, wherein the preamble includes the Number of HE-LTF Symbols field therein.

19. The apparatus of claim 15, wherein:

the obtaining of the data unit comprises obtaining a Trigger frame including the Number of HE-LTF Symbols field therein.

20. A wireless node, comprising:

a receiver configured to receive a physical layer protocol data unit (PPDU) for Wi-Fi communication data unit comprising a Number of High Efficiency Long Training Field (HE-LTF) Symbols field and a Doppler bit; and

a processing system configured to;

determine, based on the Doppler bit being set to a value of 1, that the Number of HE-LTF Symbols field is repurposed to carry mid-amble update interval information,

determine, based on the mid-amble update interval information, where mid-ambles are located in the data unit, and

perform channel estimation for a wireless communication channel based on the mid-ambles.