RE: [rohc] Use of User-specific Dictionary

["Price, Richard" <richard.price@roke.co.uk>]

> i would like to refer to the test on Use of User-Specific Dictionary.
> 
> i) Should the User-Specific Dictionary be uploaded as plain text or included
> as part of a SigComp message which means it has to be compressed ?

Hi Kwang Mien,

The choice of how to upload the User-Specific Dictionary is made by the
compressor. The dictionary will always be part of a SigComp message,
but it's up to the compressor to decide whether to send the dictionary
compressed or as plain text.

> ii) How does endpoint 1 inform endpoint 2 that it is uploading the
> Dictionary to it ?
> is there a special flag to indicate this ?

Endpoint 1 informs endpoint 2 that it is uploading the dictionary by
sending a piece of UDVM bytecode. This code should tell endpoint 2
to decompress the dictionary (if necessary) and then to save it as
state, so that it can be retrieved when later messages need to be
decompressed.

Regards,

Richard

> Thanks !!
> 
> regards,
> Kwang Mien
> 
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