Methods and arrangements for time-sharing in a dense environment

Patent metadata

Field	Value
Publication number	US-9923663-B2
Application number	US-201414229792-A
Country	US
Kind code	B2
Filing date	Mar 28, 2014
Priority date	Mar 28, 2014
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

Logic may enable communication between stations in the presence of interference. Logic may communicate with the station in the presence of interference, the interference from a communication between other stations comprising a first network allocation vector (NAV) reminder, by entering a mode in which a Control Physical layer (PHY) modulation and coding scheme (MCS) is enabled and a Single Carrier PHY MCS is disabled. Logic may enable the Single Carrier PHY MCS in response to receipt of a clear-to-send (CTS) or an expiration of a CTS timeout. Logic may determine an active time remainder during a Contention-based access period. Logic may determine a time to access a channel in response to receipt of the Denial to Send and based upon a predefined, maximum inactivity time. Logic may remain beamformed while the apparatus is in the Control PHY mode.

First claim

What is claimed is:

1. An apparatus to enable communication between stations in the presence of interference, the apparatus comprising:
a memory to store code;
a processor coupled with the memory to implement the code to perform medium access control (MAC) logic, the processor:
to receive a network allocation vector (NAV) reminder from a communication between other stations;
to enter a Control Physical layer (PHY) mode in which a Control PHY modulation and coding scheme is enabled and other supported modulation and coding schemes are disabled, in response to receipt of the NAV reminder;
to determine a time to access a channel in response to receipt of the NAV reminder associated with the interference and based upon the NAV reminder and a predefined time period for which the apparatus may remain inactive during an access period; and
to enable one or more of the other supported modulation and coding schemes in response to receipt of a clear-to-send (CTS) or an expiration of a CTS timeout.

2. The apparatus of claim 1 , further comprising:
a radio coupled with a physical layer device, and
one or more antennas coupled with the radio to receive the NAV reminder.

3. The apparatus of claim 1 , wherein the memory comprises code for execution by the processor to implement Thermal Design Parameter (TDP) logic to determine an active time remainder for the apparatus during a Contention-based access period (CBAP).

4. The apparatus of claim 1 , wherein the memory comprises code for execution by the processor to implement Denial to Send (DTS) logic to set a NAV timer of the apparatus based upon the NAV reminder received in a DTS.

5. The apparatus of claim 1 , wherein the memory comprises code for execution by the processor to remain beamformed while the apparatus is in the Control PHY mode and to enable a Single Carrier PHY modulation and coding scheme of the other supported modulation and coding schemes in response to receipt of the clear-to-send (CTS) or the expiration of a CTS timeout.

6. One or more tangible computer-readable non-transitory storage media comprising computer-executable instructions operable to, when executed by at least one computer processor, enable the at least one computer processor to implement a method comprising:
receiving a first network allocation vector (NAV) reminder from a communication between other stations;
entering a Control Physical layer (PHY) mode in which a Control PHY modulation and coding scheme is enabled and other supported modulation and coding schemes are disabled, in response to receipt of the first NAV reminder;
determining a time to access a channel in response to receipt of the first NAV reminder and based upon the first NAV reminder and a predefined time period to remain inactive during an access period; and
enabling one or more of the other supported modulation and coding schemes in response to receipt of a clear-to-send (CTS) or an expiration of a CTS timeout.

7. The one or more tangible computer-readable non-transitory storage media of claim 6 , further comprising determining an active time remainder during a Contention-based access period (CBAP).

8. The one or more tangible computer-readable non-transitory storage media of claim 6 , further comprising setting a NAV timer based upon a second NAV reminder received in a Denial to Send (DTS).

9. The one or more tangible computer-readable non-transitory storage media of claim 6 , further comprising remaining beamformed while in the Control PHY mode.

10. A method to enable communication between stations in the presence of interference, the method comprising:
receiving a first network allocation vector (NAV) reminder from a communication between other stations;
entering a Control Physical layer (PHY) mode in which a Control PHY modulation and coding scheme is enabled and other supported modulation and coding schemes are disabled, in response to receipt of the first NAV reminder;
determining a time to access a channel in response to receipt of the first NAV reminder and based upon the first NAV reminder and a predefined time period to remain inactive during an access period; and
enabling one or more of the other supported modulation and coding schemes in response to receipt of a clear-to-send (CTS) or an expiration of a CTS timeout.

11. The method of claim 10 , further comprising determining an active time remainder during a Contention-based access period (CBAP).

12. The method of claim 10 , further comprising setting a NAV timer based upon a second NAV reminder received in a Denial to Send (DTS).

13. The method of claim 10 , further comprising remaining beamformed while in the Control PHY mode.

14. An apparatus to enable communication between stations in the presence of interference, the apparatus comprising;
a memory to store code;
a processor coupled with the memory to implement the code to perform medium access control (MAC) logic, the processor to:
receive a control frame with a first network allocation vector (NAV) reminder from a communication between other stations;
set a NAV timer for the apparatus based upon the first NAV reminder;
enter a Control Physical layer (PHY) mode with a Control PHY modulation and coding scheme enabled and other supported modulation and coding schemes disabled in response to receipt of the first NAV reminder;
transmit a Denial to Send (DTS) in response to receipt of a Ready to Send (RTS) from a transmitting station while the NAV timer is not reset;
enable one or more of the other supported modulation and coding schemes in response to receipt of a second RTS while the NAV timer is reset; and
a physical layer device coupled with the medium access control logic to receive the control frame.

15. The apparatus of claim 14 , further comprising
a radio coupled with the physical layer device, and
one or more antennas coupled with the radio to receive the control frame.

16. The apparatus of claim 14 , wherein the memory comprises code for execution by the processor to enable a SC PHY modulation and coding scheme of the other supported modulation and coding schemes after receipt of a different Ready to Send from the transmitting station while the NAV timer is reset.

17. The apparatus of claim 14 , wherein the memory comprises code for execution by the processor to remain beamformed while the apparatus is in the Control PHY mode.

18. One or more tangible computer-readable non-transitory storage media comprising computer-executable instructions operable to, when executed by at least one computer processor, enable the at least one computer processor to implement a method comprising:
receiving a control frame with a first network allocation vector (NAV) reminder from a communication between other stations;
setting a NAV timer based upon the first NAV reminder;
entering a Control Physical layer (PHY) mode with a Control PHY modulation and coding scheme enabled and other supported modulation and coding schemes disabled in response to receipt of the first NAV reminder;
transmitting a Denial to Send (DTS) in response to receipt of a Ready to Send (RTS) from a transmitting station while the NAV timer is not reset; and
enabling one or more of the other supported modulation and coding schemes in response to receipt of a second RTS while the NAV timer is reset.

19. The one or more tangible computer-readable non-transitory storage media of claim 18 , further comprising enabling a SC PHY modulation and coding scheme of the other supported modulation and coding schemes after receipt of a different Ready to Sen

Assignees

• Intel Ip Corp

Inventors

• Trainin Solomon B
• Harel Tom
• Brainman Igor

Classifications

• H04W74/002

  Transmission of channel access control information · CPC title

• H04L1/0003

  by switching between different modulation schemes · CPC title

• H04L1/0009 Primary

  by adapting the channel coding (H04L1/1812 takes precedence) · CPC title

• H04W74/0816

  with collision avoidance · CPC title