RE: [rohc] context update in case of packet loss

["Lars-Erik Jonsson (EAB)" <Lars-Erik.Jonsson@epl.ericsson.se>]

> Please can you tell me where exactly does the compressor and 
> decompressor fit in a traditional layer 7 model. My understanding
> is that it fits between layer 2 (data link layer) and layer 3
> (network layer or IP). If that is the case, if a solution has to
> be implemented then dont we have to tweak into layer2, layer3
> implementation of the stacks on respective platforms??

I would say that ROHC is "on top of" layer 2, i.e. the layer 2
technology must provide means to support ROHC. In the ROHC WG, we
have defined this for PPP as L2, see RFC 3241, which is the only
L2 protocol we have considered us (the IETF) responsible for. Take
a look at RFC 3241, it is a good example of L2 support for ROHC.

BR
/L-E

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