EHT error recovery in synchronous multiple-frame transmission in wireless communications
Various examples pertaining to extremely-high-throughput (EHT) error recovery in synchronous multiple-frame transmission in wireless communications are described. A multi-link device (MLD) detects a failure related to either or both of a first frame exchange sequence on a first link or a second frame exchange sequence on a second link. In response to the detecting, the MLD adjusts a timing of either or both of a first subsequent transmission on the first link and a second subsequent transmission on the second link to align the first and second subsequent transmissions.
1 . A method, comprising:
detecting a failure related to a first frame exchange sequence on a first link or a second frame exchange sequence on a second link that are performed by a multi-link device (MLD); and
adjusting a timing of at least one of a first subsequent transmission on the first link and a second subsequent transmission on the second link to align the first and second subsequent transmissions by the MLD responsive to the detecting,
wherein the adjusting of the timing comprises performing one of a first procedure, a second procedure, a third procedure and a fourth procedure,
wherein the first procedure comprises, responsive to detecting the failure related to the second exchange sequence on the second link:
starting the first subsequent transmission on the first link at a first point coordination function (PCF) inter-frame space (PIFS) after an ending time of the first frame exchange sequence; and
starting the second subsequent transmission on the second link at a first short inter-frame space (SIFS) plus a delta after an ending time of the second frame exchange sequence, with the delta being between 0 μs and 8 μs,
wherein the second procedure comprises, responsive to detecting the failure related to the second exchange sequence on the second link:
starting the first subsequent transmission on the first link at a second PIFS after the ending time of the first frame exchange sequence with padding; and
starting the second subsequent transmission on the second link at a second SIFS plus the delta after the ending time of the second frame exchange sequence with padding,
wherein the third procedure comprises, responsive to detecting the failure related to the second exchange sequence on the second link:
starting the first subsequent transmission on the first link at a third SIFS plus a first delta after the ending time of the first frame exchange sequence with or without padding; and
starting the second subsequent transmission on the second link at the third SIFS plus a second delta after the ending time of the second frame exchange sequence with or without padding, with each of the first delta and the second delta being between 0 μs and 8 μs, and
wherein the fourth procedure comprises, responsive to a difference between the ending time of the first frame exchange sequence and the ending time of the second frame exchange sequence being up to 4 μs, adjusting a starting time of each of the first subsequent transmission on the first link and the second subsequent transmission on the second link such that the starting time of each of the first subsequent transmission and the second subsequent transmission is after the ending time of the first frame exchange sequence on the first link or the ending time of the second frame exchange sequence on the second link by one PIFS.
2 . The method of claim 1 , wherein the MLD comprises a non-simultaneous-transmission-and-reception (non-STR) MLD which cannot simultaneously transmit on one link and receive on another link of a plurality of links including the first link and the second link due to in-device coexistence (IDC) interference.
3 . An apparatus implementable in a multi-link device (MLD), comprising:
a transceiver configured to communicate wirelessly on a plurality of links including at least a first link and a second link; and
a processor coupled to the transceiver and configured to perform operations comprising:
detecting, via the transceiver, a condition related to a first transmission on the first link or a second transmission on the second link; and
adjusting, via the transceiver, a timing of at least one of a first subsequent transmission on the first link and a second subsequent transmission on the second link to align the first and second subsequent transmissions responsive to the detecting,
wherein the adjusting of the timing comprises performing one of a first procedure, a second procedure, a third procedure and a fourth procedure,
wherein the first procedure comprises, responsive to detecting the failure related to the second exchange sequence on the second link:
starting the first subsequent transmission on the first link at a first point coordination function (PCF) inter-frame space (PIFS) after an ending time of the first frame exchange sequence; and
starting the second subsequent transmission on the second link at a first short inter-frame space (SIFS) plus a delta after an ending time of the second frame exchange sequence, with the delta being between 0 μs and 8 μs,
wherein the second procedure comprises, responsive to detecting the failure related to the second exchange sequence on the second link:
starting the first subsequent transmission on the first link at a second PIFS after the ending time of the first frame exchange sequence with padding; and
starting the second subsequent transmission on the second link at a second SIFS plus the delta after the ending time of the second frame exchange sequence with padding,
wherein the third procedure comprises, responsive to detecting the failure related to the second exchange sequence on the second link:
starting the first subsequent transmission on the first link at a third SIFS plus a first delta after the ending time of the first frame exchange sequence with or without padding; and
starting the second subsequent transmission on the second link at the third SIFS plus a second delta after the ending time of the second frame exchange sequence with or without padding, with each of the first delta and the second delta being between 0 μs and 8 μs, and
wherein the fourth procedure comprises, responsive to a difference between the ending time of the first frame exchange sequence and the ending time of the second frame exchange sequence being up to 4 μs, adjusting a starting time of each of the first subsequent transmission on the first link and the second subsequent transmission on the second link such that the starting time of each of the first subsequent transmission and the second subsequent transmission is after the ending time of the first frame exchange sequence on the first link or the ending time of the second frame exchange sequence on the second link by one PIFS.
4 . The apparatus of claim 3 , wherein, in adjusting the timing, the processor further performs operations comprising:
starting the first subsequent transmission on the first link at an acknowledgement timeout (AckTimeout) period plus a point coordination function (PCF) inter-frame space (PIFS) after an ending time of the first transmission; and
starting the second subsequent transmission on the second link at the AckTimeout period plus a delta plus the PIFS after an ending time of the second transmission,
wherein the delta is between 0 μs and 8 μs.
5 . The apparatus of claim 3 , wherein the MLD comprises a non-simultaneous-transmission-and-reception (non-STR) MLD which cannot simultaneously transmit on one link and receive on another link of a plurality of links including the first link and the second link due to in-device coexistence (IDC) interference.