SCTP: SSN,TSN and data delivery mechanism

Saraswati Bose <[email protected]>
Newsgroups gmane.ietf.sigtran
Message-ID <[email protected]> 
Hi Brian,
  1.As per rfc-2960 sectiopn 3.3.1, in Stream Sequence Number description its said that "when a data message is fragmented then the fragments will have same Stream Sequence Number." 
  Should not that imply that these SCTP data fragments will be transmitted over same sctp stream because stream seqence number indicates the sequence of data message within the particular stream? If not please rectify my understanding.
   
  2. Ordered Delivery:When ordered delivery is intended then SCTP must check the SSN numbers of all tsns (chunks) and then deliver the chunks in order of SSNs for the particular stream. Right or wrong? 
  Please rectify if wrong
   
  3. Unordered Delivery: For this case SCTP at the receiving end just collects all tsn corresponding to the fragmented data (identified by the same ssn value) and sends to the above user layer. Right or wrong?
  Please rectify if wrong
   
  Regards,
Saraswati
   

 		
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