Re: Add-CID and large_CID

Cai,

> When the upper layer indicate Large_CID valid, Could decompressor deal
with a compression header with Add-CID?
No, I don't think so.

The LARGE_CID parameter is negotiated at channel set-up. See
5.1.(1.) for more information. If it is negotiated to LARGE_CID,
the compressor must not send a ADD-CID octet, because it it used for
small cid. See "Add-CID Octet" on page 43. From my point of view,
the decompressor must discard packets starting with a ADD-CID octet on
LARGE_CID mode. It should not assume SMALL_CID's if it receives a
ADD-CID octet, because it won't work for SMALL_CID's with CID 0. In
this case, the packet start immediately with type indication and body.

br
Klaus Warnke

[email protected] wrote:
>
> As is known to all, Decompressor could confirm Add-CID or large_CID
> from compression header;
>
> On the other hand, the upper layer may indicate Large_CID whether
> valid or not.
>
> When the upper layer indicate Large_CID valid, Could decompressor deal
> with a compression header with Add-CID?
> 	
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