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| --- This message came from the IEEE 802.11 Task Group M Technical Reflector ---
Sean, Ok, I can see that concern about a requirement in the definitions. So, maybe bigger rewording is really what I’m after, to make it more clear that this is a key part of the operation of this feature. Something like: basic modulation and coding scheme (MCS) set: A set of MCSs designated by the station (STA) that started the basic service set (BSS) and fixed for the lifetime of the BSS, which are supported for transmit and receive by all STAs that join the BSS. The basic MCS set is typically advertised in the physical layer (PHY) operation element(s), e.g. HT and VHT Operation elements. Mark From: Sean Coffey <coffey@xxxxxxxxxxx> Mark, Thanks. It is tempting to write this, I agree. One reason not to do it is that “shall” statements are not normally included in definitions (I think—haven’t checked!). Another reason, which Mark R. and I discussed in detail in coming up with this joint proposal for a definition, is that wording it this way (“a STA … shall”) makes it sound as if this is a normative requirement on the STA. This in turn creates problems when there is a later statement to the effect that the AP does not have to include mandatory rates in the basic rate set. (“Mandatory rates” = “rates that the STA shall support”. “Basic rate set” = “rates that the STA shall support”. But “Basic rate set” is not the same as “mandatory rate set”. Hmmm.) I’m thinking of putting together a short document giving the proposed background and a 5-10 sentence distillation of the discussion leading up to it. Regards, Sean From: Mark Hamilton <mark.hamilton2152@xxxxxxxxx> --- This message came from the IEEE 802.11 Task Group M Technical Reflector --- Thanks, Jon and Sean. A minor suggestion (I think): Would it be better to describe the “basic … set” as the rates/MCSs that all STAs _must_ “be capable of …” before joining the BSS, rather than the passive (and assumptive) statement that all members of the BSS _are_ “capable of…”? That is, I would word it as: basic modulation and coding scheme (MCS) set: A set of MCSs designated by the station (STA) that started the basic service set (BSS) and fixed for the lifetime of the BSS. The basic MCS set is typically advertised in the physical layer (PHY) operation element(s), e.g. HT and VHT Operation elements. All STAs in a BSS Mark From: Jon Rosdahl <jrosdahl@xxxxxxxx> --- This message came from the IEEE 802.11 Task Group M Technical Reflector --- Thanks to Sean Coffey for the heavy lifting on this CID. After reviewing with others, I wanted to put this to the full TG for consideration. Background Discussion from Sean:
I have put the proposed resolution for CID 97 into the AdHoc Notes. It is simply : Proposed Resolution: Revised; I have marked CID 97 as Review - we can discuss it on the Oct 29th Telecon (Thanks Michael for assigning an Agenda Time). I will note that the original definitions from Sean had an extra sentence that has been removed as not necessary to the definition. Feedback Welcome, Jon ----------------------------------------------------------------------------- Jon Rosdahl Engineer, Senior Staff
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