Re: [16NG] Re: traffic classification

["JinHyeock Choi" <[e-mail]>]

> > I think it _may_ be relevant here.  IPv6 has a Traffic Class field with
> > defined values (see rfc2474 for 6bit DSCP, and rfc2597 for AF Assured
> > Forwarding values).  802.16 has Service Class service flow encodings
> > (11.13.4 in 802.16-1004).  The mapping between the two should be
> > specified here I believe.
> >
> > Basically one would need to define mappings between DSCPs and 802.16
> > Service Flow encodings.  Remark the mapping is not straightforward
> > because DSCP uses 6bit while service field is on 4bit.  But not all
> > values from 6bit need to be encoded either.
> >
> > I think 802.16 spec doesn't define these mappings.  Although they do
> > define filter in the CS that interprets the IPv6 Traffic Class field.
>
> Anyone who understands in detail what 802.16 classification
> does, feel free to jump in here... DJ?
>
> My assumption was that 802.16 defines a classification mechanism
> that can look at certain fields from IP packets and determine what
> service flow should be used, including all parameters used in the
> service flow. If this is not the case then you are right.

Classification is the process by which a MAC SDU (IPv6 packet in our
case) is mapped onto a particular transport connection for
transmission between MAC peers (BS and MS in our case). The mapping
process associates an IPv6 packet with a transport connection and its
CID (Connection Identifier).

Classifiers are matching criteria applied to each packet and consist
of some protocol-specific packet matching criteria such as destination
IP address. If a packet matches the specified packet matching criteria
(i.e. classifier(s)), it is then delivered to the SAP for delivery on
the connection defined by the CID (Connection Identifier).

You may find more detail in 5.2.2 of 802.16. I also put a figure in

http://www.diffeo.com/16ng/fig.gif

Thanks for your kind consideration.

Best Regards

JinHyeock

_______________________________________________
16NG mailing list
[e-mail]
https://www1.ietf.org/mailman/listinfo/16ng