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

[alreddy@hss.hns.com]

Hi Ashok
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??
This doubt is specific to wireline implementatio of ROHC.
since IP packet is also compressed. how is the data transmission done
incase there is a router or some entity in between which doesnt support
ROHC. Basically the question is should all the entities in the route
support ROHC or is it suffcient if ROHC is implemented just on the
endpoints??

i would be really glad to hear back from you

thanks
alphonse




"Ashok Kumar" <ashok.kum@wipro.com> on 02/11/2003 11:56:35 AM

To:   alreddy, rohc@ietf.org
cc:

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





Hi Alphonse,

When a packet is lost in transit, decompressor will not receive the
packet. So nothing needs to be done at decompressor. The subsequent
packets received by decompressor will indicate how the context should be
updated at decompressor.

-Ashok

-----Original Message-----
From: alreddy@hss.hns.com [mailto:alreddy@hss.hns.com]
Sent: Tuesday, February 11, 2003 11:44 AM
To: rohc@ietf.org
Subject: [rohc] context update in case of packet loss




Hi
Can some one tell me how the packet is updated on the decompressor side
when there is packet loss in the transit. I would really appreciate some
pointers in this regard.

thanks
alphonse






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