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]>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]> > > 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. >> >> _______________________________________________ >> Mailing list: https://launchpad.net/~rohc <https://launchpad.net/%7Erohc> >> Post to : [email protected] >> Unsubscribe : https://launchpad.net/~rohc <https://launchpad.net/%7Erohc> >> More help : https://help.launchpad.net/ListHelp >> > > > _______________________________________________ > Mailing list: https://launchpad.net/~rohc <https://launchpad.net/%7Erohc> > Post to : [email protected] > Unsubscribe : https://launchpad.net/~rohc <https://launchpad.net/%7Erohc> > More help : https://help.launchpad.net/ListHelp > > -- Ahmed Abdelrazek Embedded Software Developer, Non-Access Stratum, Research In Motion, Ltd Waterloo, ON Canada N2L 3W8 Office: 519-801-71403 Cel: 519-404-6790 [email protected]
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