Re: [mif] about draft-hui-ip-multiple-connections-ps-02

[Behcet Sarikaya <[e-mail]>]

Hi Min,
  Pls see inline, thx.

Behcet




________________________________
From: Min Hui <[e-mail]>
To: marcelo bagnulo braun <[e-mail]>
Cc: mif <[e-mail]>
Sent: Friday, March 20, 2009 3:47:24 AM
Subject: Re: [mif] about draft-hui-ip-multiple-connections-ps-02

Hi,

pls see inline reply. thx.

2009/3/19 marcelo bagnulo braun <[e-mail]>:
> Min Hui escribió:
>>
>>>
>>>>
>>>>    2.2.3. TOS consideration
>>>>
>>>>  TOS can be a parameter of routing item to indicate which kind of IP
>>>>  data is suitable to deliver by this routing. The multiple interfaces
>>>>  will connect to multiple access networks, so that the preference of
>>>>  TOS need to be merged to have a better performance of data delivery.
>>>>  For example, the WiFi access could indicate itself has broader
>>>>  bandwidth comparing with 2G access, and set the TOS as broad
>>>>  bandwidth. When another interface connects the Ethernet, the TOS is
>>>>  also set as broad bandwidth preferred. In this situation, it needs
>>>>  some mechanism to merge and reorder the TOS getting form multiple
>>>>  interfaces.
>>>>
>>>> I am not sure how widely used is this...
>>>>
>>>> A: As depicted in RFC1122, TOS is a necessary parameter to choose a
>>>> suitable routing. And different applications have different
>>>> requirements of access network, which can be reflected as TOS. So we
>>>> think TOS will be useful in multiple interface situations.
>>>>
>>>>
>>>>
>>>
>>> right, my question was how widely used is this. I mean how much of the
>>> internet traffic actually sets the TOS?
>>>
>>
>> The 3G network use TOS as one of the QoS parameters, and we suppose to
>> use it in the multiple interfaces situation.
>>
>>
>
> ok, but does any other network uses this?
> I mean, if only 3g networks use this, this is only a problem when
> simultaneously connecting to multiple 3G networks, so i am not sure how
> common this is
There are 3GPP and 3GPP2 mobile network which have been deployed, both
of them support it.
Some network use it for Wifi access network as well.
There are more and more motivation to do different service quality
categorization,
such as put the p2p more low level.

[behcet] I believe you. I think it would be more convincing if you could give us which standard, e.g. 23.401 this is mentioned. Without any evidence we just need to believe you.