Systems and methods of wireless medium access recovery
A first device within a multi-link device having a plurality of wireless links including a first link and a second link, may include one or more processors configured to receive a first frame on the first link while communicating with a second device for transmission of a second frame on the second link. The one or more processors may decode a portion of the first frame to determine a first duration of no medium access. The one or more processors may determine, a second duration comprising a remaining transmission duration on the second link. The one or more processors may determine whether the first duration is greater than or equal to the second duration. In response to the first duration being greater than or equal to the second duration, the one or more processors may defer channel access on the first link until an end of the first duration.
1. A first device within a multi-link device having a plurality of wireless links including a first link and a second link, the first device comprising:
one or more processors configured to:
receive a first frame on the first link while communicating with a second device for transmission of a second frame on the second link;
decode a portion of the first frame to determine a first duration of no medium access;
determine, a second duration comprising a remaining transmission duration on the second link;
determine whether the first duration is greater than or equal to the second duration; and
in response to the first duration being greater than or equal to the second duration, defer channel access on the first link until an end of the first duration.
2. The first device according to claim 1 , wherein the one or more processors are configured to:
in response to the first duration being smaller than the second duration, defer the channel access until after a predetermined time elapses from an end of the transmission of the second frame.
3. The first device according to claim 1 , wherein the one or more processors are configured to:
in response to the first duration being smaller than the second duration, defer the channel access until an end of the transmission of the second frame and then initiate a medium access recovery process on the first link.
4. The first device according to claim 1 , wherein the first duration is a physical layer protocol data unit (PPDU) duration of a legacy preamble of the first frame.
5. The first device according to claim 1 , wherein the portion of the first frame is a transmit opportunity (TXOP) field of the first frame.
6. The first device according to claim 1 , wherein the portion of the first frame is a duration field of a medium access control (MAC) header of the first frame.
7. The first device according to claim 1 , wherein the one or more processors are configured to:
in response to the first duration being greater than or equal to the second duration, or the portion being received at or after an end of the transmission of the second frame or an associated downlink or acknowledgement frame, defer channel access on the first link until an end of the first duration.
8. The first device according to claim 1 , wherein the second frame comprises a clear-to-send frame or a buffer status report frame.
9. The first device according to claim 8 , wherein the one or more processors are configured to:
transmit an acknowledgment frame to the second device at or after an end of the transmission of the second frame; and
in response to the first duration being smaller than the second duration, defer the channel access until after a predetermined time elapses from an end of the transmission of the acknowledgment frame.
10. The first device according to claim 8 , wherein the one or more processors are configured to:
transmit an acknowledgment frame to the second device at or after an end of the transmission of the second frame; and
in response to the first duration being smaller than the second duration, defer the channel access until an end of the transmission of the acknowledgment frame and then initiate a medium access recovery process.
11. A method comprising:
receiving, by a first device within a multi-link device having a plurality of wireless links, a first frame on a first link of the plurality of wireless links, while communicating with a second device for transmission of a second frame on a second link of the plurality of wireless links;
decoding, by the first device, a portion of the first frame to determine a first duration of no medium access;
determining, by the first device, a second duration comprising a remaining transmission duration on the second link;
determining, by the first device, whether the first duration is greater than or equal to the second duration; and
in response to the first duration being greater than or equal to the second duration, deferring, by the first device, channel access on the first link until an end of the first duration.
12. The method according to claim 11 , comprising:
in response to the first duration being smaller than the second duration, deferring, by the first device, the channel access until after a predetermined time elapses from an end of the transmission of the second frame.
13. The method according to claim 11 , comprising:
in response to the first duration being smaller than the second duration, deferring, by the first device, the channel access until an end of the transmission of the second frame and then initiate a medium access recovery process on the first link.
14. The method according to claim 11 , wherein the first duration is a physical layer protocol data unit (PPDU) duration of a legacy preamble of the first frame.
15. The method according to claim 11 , wherein the portion of the first frame is a transmit opportunity (TXOP) field of the first frame.
16. The method according to claim 11 , wherein the portion of the first frame is a duration field of a medium access control (MAC) header of the first frame.
17. The method according to claim 11 , comprising:
in response to the first duration being greater than or equal to the second duration, or the portion being received at or after an end of the transmission of the second frame or an associated downlink or acknowledgement frame, deferring, by the first device, channel access on the first link until an end of the first duration.
18. The method according to claim 11 , wherein the second frame comprises a clear-to-send frame or a buffer status report frame.
19. The method according to claim 18 , comprising:
transmitting, by the first device, an acknowledgment frame to the second device at or after an end of the transmission of the second frame; and
in response to the first duration being smaller than the second duration, deferring, by the first device, the channel access until after a predetermined time elapses from an end of the transmission of the acknowledgment frame.
20. The method according to claim 18 , comprising:
transmitting, by the first device, an acknowledgment frame to the second device at or after an end of the transmission of the second frame; and
in response to the first duration being smaller than the second duration, deferring, by the first device, the channel access until an end of the transmission of the acknowledgment frame and then initiate a medium access recovery process.