Ahmed,
Such a case would be needed because any two arbitrary endpoints in the
internet are not separated by a single link/hop. Thus packets might have
to traverse several links before they reach their destination.
It would be more efficient if compression/decompression did not occur at
every hop.
Hopefully this clarifies your question, maybe someone else on the group
can chip in.
Regards,
Vikram.
Hi,
Why do we need such a case?
My understanding is that we do the complex algorithms of header
compression and accept all this overhead *to save bandwidth on the link
layer*, but once the packet arrives to the upper layers of the protocol
stack (PC or hand-held device) we need the uncompressed header to
process the packet.
Thanks,
Ahmed
On Wed, May 19, 2010 at 4:39 PM, Cédric Baudoin
<[email protected] <mailto:[email protected]>> wrote:
Hi,
Basically, ROHC is a link layer compression, that is to say that the
packets are compressed only on a link (hop by hop if you prefer) and
not over the entire internet (end to end).
I heard some research activities about end to end compression, but I
do not have enough information. Maybe some layer 2 solutions (or
2.5) can be found
Best regards
Cédric
2010/5/19 Vikram Ragukumar <[email protected]
<mailto:[email protected]>>
Hello,
I have a fairly basic question with respect to RoHC. It appears
that packets with compressed RTP/UDP/IP headers (chosen as an
example profile) do not contain references to source/destination
IP addresses.
How then will such a packet be routed ?
Does decompression/compression have to take place at every hop
so that a routing decision can be made ? If yes, are there any
solutions that support end-end header compression, i.e header
compression/decompression takes place only at end points
corresponding to source/destination IP addresses in original
uncompressed IP header.
Thank you in advance for your help.
Regards,
Vikram.
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