Re: [RPRWG] Decoupling the service classes
Fredrik,
John could not attend the meeting, and very little was sent to him
in advance. Please give him some time to pull this together. Normally
he does it while at the meeting (when he does have more free time).
mike
Fredrik Davik wrote:
> When looking at the May 2003 meeting proceedings on the RPRWG web
> site, it contains only 4 presentations.
>
> Fom a look at the agenda slides and from the comments in David's mail,
> I get a feeling there should have been more. Where are they?..
>
> Best Regards,
> Fredrik
> ---------------------------------------------
> Fredrik Davik
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> "David V James" <dvj@xxxxxxxxxxxx> writes:
>
>
>>All,
>>
>>Presentations at last week's meeting indicated a shared
>>(by at least a few of us) concern towards the interactions
>>between classB/C and classA traffic guarantees.
>>
>>To assist with thoughts in this area, I have attached a
>>short description that (I believe) shows the "tough"
>>scenario and describes how it could be handled. Its
>>an overview only, but a useful starting point before
>>jumping into the equations&simulations swamp.
>>
>>The key points are as follows:
>> a) Downstream shaper scoping:
>> 1) Must throttle classB&classC (not just classC).
>> 2) Must throttle STQ, as well as add traffic.
>> b) Downstream shaper rates:
>> 1) If lightly congested downstream, the throttle
>> limits would support downstream subclassA0 rates.
>> 2) If highly congested downstream, the throttle
>> limits would support downstream classA rates
>> (subclassA0 plus subclassA1).
>> c) ClassB should have precedence over classC.
>>
>>As is typical with prioritized classes, the difficult
>>problems are not fairness within a class, but sustaining
>>fairness while supporting prioritization between classes.
>>
>>DVJ
>>
>>
>>David V. James
>>3180 South Ct
>>Palo Alto, CA 94306
>>Home: +1.650.494.0926
>> +1.650.856.9801
>>Cell: +1.650.954.6906
>>Fax: +1.360.242.5508
>>Base: dvj@xxxxxxxxxxxx
>
--
Michael Takefman tak@xxxxxxxxx
Manager of Engineering, Cisco Systems
Chair IEEE 802.17 Stds WG
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