is handled in 10.22.2.4 (Obtaining an EDCA TXOP)) if There is a frame available for transmission at that EDCAF, and — The backoff for that EDCAF has a value of 0, and — Initiation of a transmission sequence is allowed to commence at this time for an EDCAF of higher UP. — I do not see that the and only one” need be stated, either the rule is clear or it is not and there should not be a “one choice. COMMENT In my opinion, EDCA have been much simpler as it could have just followed the DCF explanation using AIFS in place of DIFS. As DCF did not use this boundary” concept it now looks as though they are different “slot which was not the idea. In addition to that, the aRxTxTurnaroundTime that is included in each slot boundary and Figure 10-26 is nothing short of confusing even if I could be convinced it is correct. Poll Changes similar to proposed 5 Move 9 “Note” Reject 7 Personally, I consider the proposed text to be clearer. We have had many comments on this text and this proposed text would satisfy most of them. I urge others to look again. There is no change in behaviour being proposed. Proposed resolution: REVISED Make changes as shown: At P1487.13 f) Following aSlotTime of idle medium, occurs immediately after any of these conditions, a) to ), is met for the EDCAF. At At each of the above-described specific slot boundaries each EDCAF shall decrement the backoff if the backoff for that EDCAF has a nonzero value. each shall initiate a transmission sequence if There is a frame available for transmission at that EDCAF, and — The backoff for that has a value of 0, and — Initiation of a transmission sequence is not allowed to commence at this time for an EDCAF of higher UP. — each EDCAF shall report an internal collision (which is handled in 10.22.2.4 (Obtaining an EDCA TXOP)) if There is a frame available for transmission at that EDCAF, and — The backoff for that EDCAF has a value of 0, and — Initiation of a transmission sequence is allowed to commence at this time for an EDCAF of higher UP. —
is handled in 10.22.2.4 (Obtaining an EDCA TXOP)) if — There is a frame available for transmission at that EDCAF, and — The backoff for that EDCAF has a value of 0, and — Initiation of a transmission sequence is allowed to commence at this time for an EDCAF of higher UP. I do not see that the “one and only one” need be stated, either the rule is clear or it is not and there should not be a choice. COMMENT In my opinion, EDCA have been much simpler as it could have just followed the DCF explanation using AIFS in place of DIFS. As DCF did not use this “slot boundary” concept it now looks as though they are different which was not the idea. In addition to that, the aRxTxTurnaroundTime that is included in each slot boundary and Figure 10-26 is nothing short of confusing even if I could be convinced it is correct. Poll Changes similar to proposed 5 Move “Note” 9 Reject 7 Personally, I consider the proposed text to be clearer. We have had many comments on this text and this proposed text would satisfy most of them. I urge others to look again. There is no change in behaviour being proposed. Proposed resolution: REVISED Make changes as shown: At P1487.13 f) Following aSlotTime of idle medium, occurs immediately after any of these conditions, a) to ), is met for the EDCAF. At At each of the above-described specific slot boundaries each EDCAF shall decrement the backoff if the backoff for that EDCAF has a nonzero value. each shall initiate a transmission sequence if — There is a frame available for transmission at that EDCAF, and — The backoff for that has a value of 0, and — Initiation of a transmission sequence is not allowed to commence at this time for an EDCAF of higher UP. each EDCAF shall report an internal collision (which is handled in 10.22.2.4 (Obtaining an EDCA TXOP)) if — There is a frame available for transmission at that EDCAF, and — The backoff for that EDCAF has a value of 0, and — Initiation of a transmission sequence is allowed to commence at this time for an EDCAF of higher UP.