RE: [rohc] Query about Returned Feedback

[Chan Kwang Mien <chankm@icr.a-star.edu.sg>]

hi Richard,

Can the shared_state_id also be included in the "returned feedback item" 
field ?
for e.g  A sends a compressed message to B. B decompresses and saves the state.
In the next SigComp message to B, A includes the shared_state_id of the 
previous message
in the "returned feedback item" field.

i have the impression that the "returned feedback item" field should only 
contain items requested by the
other remote host. is that true ?

regards,
Kwang Mien


> > hi,
> >
> > According to SigComp user guide, my interpretation is that
> > the receiving endpoint returns the acked_state_id
> > in the "returned feedback item" field of SigComp message.
> > However, when referring to RFC 3321, section
> > 6.1, Figure 5 shows that the acked_state_id is in the
> > "Remaining SigComp message" field.
> >
> > Does it mean that acked_state_id can exist in either location
> > in a SigComp message ?
>
> Hi Kwang Mien,
>
> That's exactly right - the acked_state_id can be carried either
> in the "returned feedback item", or in the main body of the
> SigComp message. Where the acked_state_id goes is chosen by the
> bytecode that is uploaded to the UDVM.
>
> The SigComp User Guide contains bytecode to implement both
> cases (see Section 6.1 and Section 6.5 for more details).
>
> Regards,
>
> Richard
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