Re: [6tisch] Questions on TSCH CSMA-CA retransmission algorithm in IEEE 802.15.4-2015

2018-10-06 Thread Yasuyuki Tanaka
Thank you, Tero! > The TG4md documents can be found from [1] and there is > consolidated comments from the last letter ballot [2], and from there > you can find the CID 93 that is talking about the frame pending bit on > TSCH. Yes, I found CID 93. Nice. > This rewrite will most likely add some

Re: [6tisch] Questions on TSCH CSMA-CA retransmission algorithm in IEEE 802.15.4-2015

2018-10-05 Thread Tero Kivinen
Yasuyuki Tanaka writes: > I came across another question on the retransmission algorithm. > Could you help...? > > What should we do when a frame sent in an un-scheduled slot is not > acknowledged? > > As you know, with the frame pending bit, we can send a frame even if > we don't have a cell

Re: [6tisch] Questions on TSCH CSMA-CA retransmission algorithm in IEEE 802.15.4-2015

2018-10-05 Thread Yasuyuki Tanaka
Hi Tero, I came across another question on the retransmission algorithm. Could you help...? What should we do when a frame sent in an un-scheduled slot is not acknowledged? As you know, with the frame pending bit, we can send a frame even if we don't have a cell scheduled at that time

Re: [6tisch] Questions on TSCH CSMA-CA retransmission algorithm in IEEE 802.15.4-2015

2018-06-22 Thread Tero Kivinen
Yasuyuki Tanaka writes: > tero> As commented already the text in page 65 consider the case where > tero> we are doing initial transmission, not retransmission. > > I see; this would clear my confusion. (note: "page 65" here is a page > number including the cover page, which corresponds to the

Re: [6tisch] Questions on TSCH CSMA-CA retransmission algorithm in IEEE 802.15.4-2015

2018-06-21 Thread Yasuyuki Tanaka
Hello Tero, I think I'm very close to the full understanding. Bear with me... tero> As commented already the text in page 65 consider the case where tero> we are doing initial transmission, not retransmission. I see; this would clear my confusion. (note: "page 65" here is a page number

[6tisch] Questions on TSCH CSMA-CA retransmission algorithm in IEEE 802.15.4-2015

2018-06-20 Thread Tero Kivinen
Yasuyuki Tanaka writes: > Could anyone help me understand correctly the TSCH CSMA-CA > retransmission algorithm described in Section 6.2.5.3 of IEEE > 802.15.4-2015, starting from page-64? During the 2015 revision process we used quite a lot trying to make that figure and text correct... And it

Re: [6tisch] Questions on TSCH CSMA-CA retransmission algorithm in IEEE 802.15.4-2015

2018-06-15 Thread Thomas Watteyne
Great, thanks! On Fri, Jun 15, 2018 at 1:40 PM Yasuyuki Tanaka wrote: > Thomas, > > > Would you be able to spend 2min during the 6TiSCH call this afternoon to > summarize and ask for input? I can dedicate some time in the OAB. > > Yes, I will. Thank you! > > Yatch > > --

Re: [6tisch] Questions on TSCH CSMA-CA retransmission algorithm in IEEE 802.15.4-2015

2018-06-15 Thread Thomas Watteyne
Yatch, Would you be able to spend 2min during the 6TiSCH call this afternoon to summarize and ask for input? I can dedicate some time in the OAB. @Pat, do you plan to be there? Thomas On Thu, Jun 14, 2018 at 11:55 PM Yasuyuki Tanaka wrote: > Thank you for your comment, Thomas! > > > On Jun 14,

Re: [6tisch] Questions on TSCH CSMA-CA retransmission algorithm in IEEE 802.15.4-2015

2018-06-14 Thread Yasuyuki Tanaka
Thank you for your comment, Thomas! > On Jun 14, 2018, at 18:30, Thomas Watteyne wrote: > > I agree with Fabrice's comments, that's how I read the document. >> the backoff window is selected randomly between 0 and 2^BE-1. I may miss something, but I don't think so My understanding right

Re: [6tisch] Questions on TSCH CSMA-CA retransmission algorithm in IEEE 802.15.4-2015

2018-06-14 Thread Thomas Watteyne
I agree with Fabrice's comments, that's how I read the document. On Thu, Jun 14, 2018 at 6:07 PM Yasuyuki Tanaka wrote: > Thank you, Fabrice! > > > the backoff window is selected randomly between 0 and 2^BE-1. > > According to you, the term of "the backoff window" seems to be used as the >

Re: [6tisch] Questions on TSCH CSMA-CA retransmission algorithm in IEEE 802.15.4-2015

2018-06-14 Thread Yasuyuki Tanaka
Thank you, Fabrice! > the backoff window is selected randomly between 0 and 2^BE-1. According to you, the term of "the backoff window" seems to be used as the retransmission backoff or the retransmission backoff wait. If so, I was confused by a sentence in the third paragraph of the section,

[6tisch] Questions on TSCH CSMA-CA retransmission algorithm in IEEE 802.15.4-2015

2018-06-14 Thread Yasuyuki Tanaka
Hello all, Could anyone help me understand correctly the TSCH CSMA-CA retransmission algorithm described in Section 6.2.5.3 of IEEE 802.15.4-2015, starting from page-64? I have some questions...: --- [1] What does it mean exactly by "the backoff window"? There is no "backoff window" found in