US 11,696,345 B2Granted

Asynchronous channel access control of a wireless system

AssigneeQUALCOMM Incorporated

InventorsQi Xue, Srinivas Katar, Chao Zou, Naveen Gangadharan, Neelakantan Nurani Krishnan, Sandip Homchaudhuri, Xiaolong Huang, Anish Ashok

Life of this patent

Estimating the term…

patentgrep

Loading patent…

Abstract

This disclosure provides systems, methods and apparatus for asynchronous channel access control of a wireless system. In some aspects, a device may adjust the priority of one or more PPDUs and may perform other operations to ensure control of a wireless medium at certain times while still allowing for other devices to communicate on the wireless medium. For example, the device may adjust a backoff counter or one or more EDCA parameters to ensure obtaining control of the wireless medium to transmit a first PPDU of an application file. For one or more subsequent PPDUs of the application file, the device may again adjust a backoff counter or one or more EDCA parameters to allow other devices to obtain control of the wireless medium in certain scenarios (such as a second device to provide information back to the device or to otherwise transmit using the shared wireless medium).

Claims30

Dependent claims

A method performed by a wireless communication device for an extended reality (XR) experience, comprising:

obtaining control of a wireless medium, wherein:
the control of the wireless medium is associated with a first priority of transmitting, over the wireless medium, a first physical layer protocol data unit (PPDU) of an application file from the wireless communication device to a second device;
and
the first priority is different than a second priority of transmitting data from the second device to the wireless communication device over the wireless medium;
providing the first PPDU to the second device;
providing one or more subsequent PPDUs of the application file to the second device, wherein providing the one or more subsequent PPDUs is associated with a third priority of transmitting the one or more subsequent PPDUs over the wireless medium, wherein the first priority is associated with a first set of enhanced distributed channel access (EDCA) parameters, the second priority is associated with a second set of EDCA parameters, and the third priority is associated with a third set of EDCA parameters;
providing a first request to send (RTS) frame to obtain the control of the wireless medium, wherein the first RTS frame includes an indication of a network allocation vector NAV) to maintain the control of the wireless medium for a first time period, wherein the first time period is greater than a first transmit opportunity (TXOP) during which the first PPDU is provided;
obtaining a first clear to send (CTS) frame from the second device after providing the first RTS frame;
and
providing a second RTS frame after the first TXOP and before an end of the first time period, wherein:
the second RTS frame includes an indication of the NAV to extend the first time period to cover a plurality of TXOPs;
and
providing the first PPDU is after obtaining the first CTS frame and during the first TXOP.

10 more elements

A wireless communication device configured for an extended reality (XR) experience, comprising:

a processing system;
and
an interface configured to:
obtain control of a wireless medium, wherein:
the control of the wireless medium is associated with a first priority of transmitting, over the wireless medium, a first physical layer protocol data unit (PPDU) of an application file from the wireless communication device to a second device;
and
the first priority is different than a second priority of transmitting data from the second device to the wireless communication device over the wireless medium;
provide the first PPDU to the second device;
provide one or more subsequent PPDUs of the application file to the second device, wherein providing the one or more subsequent PPDUs is associated with a third priority of transmitting the one or more subsequent PPDUs over the wireless medium, wherein the first priority is associated with a first set of enhanced distributed channel access (EDCA) parameters, the second priority is associated with a second set of EDCA parameters, and the third priority is associated with a third set of EDCA parameters;
provide a first request to send (RTS) frame to obtain the control of the wireless medium, wherein the first RTS frame includes an indication of a network allocation vector (NAV) to maintain the control of the wireless medium for a first time period, wherein the first time period is greater than a first transmit opportunity (TXOP) during which the first PPDU is provided;
obtain a first clear to send (CTS) frame from the second device after providing the first RTS frame;
and
provide a second RTS frame after the first TXOP and before an end of the first time period, wherein:
the second RTS frame includes an indication of the NAV to extend the first time period to cover a plurality of TXOPs;
and
providing the first PPDU is after obtaining the first CTS frame and during the first TXOP.

13 more elements

A method performed by a wireless communication device, comprising:

obtaining a first physical layer protocol data unit (PPDU) of an application file from a second device over a wireless medium, wherein:
the second device obtains control of the wireless medium;
the control of the wireless medium is associated with a first priority of transmitting the first PPDU over the wireless medium;
and
the first priority is different than a second priority of transmitting data from the wireless communication device to the second device over the wireless medium;
and
obtaining one or more subsequent PPDUs of the application file from the second device, wherein obtaining the one or more subsequent PPDUs is associated with a third priority of transmitting the one or more subsequent PPDUs over the wireless medium, wherein the first priority is associated with a first set of enhanced distributed channel access (EDCA) parameters, the second priority is associated with a second set of EDCA parameters, and the third priority is associated with a third set of EDCA parameters;
obtaining a first request to send (RTS) frame from the second device, wherein the first RTS frame includes an indication of a network allocation vector (NAV) to maintain the control of the wireless medium for a first time period, wherein the first time period is greater than a first transmit opportunity (TXOP) during which the first PPDU is obtained from the second device;
providing a first clear to send (CTS) frame to the second device after obtaining the first RTS frame;
and
obtaining, from the second device, a second RTS frame after the first TXOP and before an end of the first time period, wherein:
the second RTS frame includes an indication of the NAV to extend the first time period to cover a plurality of TXOPs;
and
obtaining the first PPDU is after providing the first CTS frame and during the first TXOP.

11 more elements

A wireless communication device configured for an extended reality (XR) experience, comprising:

a processing system;
and
an interface configured to:
obtain a first physical layer protocol data unit (PPDU) of an application file from a second device over a wireless medium, wherein:
the second device obtains control of the wireless medium;
the control of the wireless medium is associated with a first priority of transmitting the first PPDU over the wireless medium;
and
the first priority is different than a second priority of transmitting data from the wireless communication device to the second device over the wireless medium;
obtain one or more subsequent PPDUs of the application file from the second device, wherein obtaining the one or more subsequent PPDUs is associated with a third priority of transmitting the one or more subsequent PPDUs over the wireless medium, wherein the first priority is associated with a first set of enhanced distributed channel access (EDCA) parameters, the second priority is associated with a second set of EDCA parameters, and the third priority is associated with a third set of EDCA parameters;
obtain a first request to send (RTS) frame from the second device, wherein the first RTS frame includes an indication of a network allocation vector (NAV) to maintain the control of the wireless medium for a first time period, wherein the first time period is greater than a first transmit opportunity (TXOP) during which the first PPDU is obtained from the second device;
provide a first clear to send (CTS) frame to the second device after obtaining the first RTS frame;
and
obtain, from the second device, a second RTS frame after the first TXOP and before an end of the first time period, wherein:
the second RTS frame includes an indication of the NAV to extend the first time period to cover a plurality of TXOPs;
and
obtaining the first PPDU is after providing the first CTS frame and during the first TXOP.

13 more elements

Dependencies are inferred from the claim text.