Hi Malleswara,
Thank you for the comment.
I understood the meaning which you pointed out and I think my understanding
is same of you.
These are my understandings from section 15.1.1 of RFC3261.
1) The session is terminated by the BYE message sending out.
2) The dialog is terminated by receiving the response to the BYE message
or a timeout
I explain with a figure, such as below:
Alice Bob
| |
| Both Way RTP Media |
|<======================>|
| |
| BYE F1 |
|<-----------------------| Session is terminated
| |
| 200 F2 |
|----------------------->| Dialog is terminated. BYE-transaction is
| | "Completed" , timer K starts.
| |
According to this general sequence, after BYE transmission,a client is
considered to hold a dialog until it receives response message or
timer K expires.
When once BYE message is sent, the dialog must be terminated finally.
In other words, from description of RFC3261, I think that the end of a
dialog is promised to terminate by transmission of BYE message.
But it is thought that the dialog does not terminate immediately, the
dialog terminate by receiving a response message or timer K expires.
Therefore we should need a consideration about the case when a client
receives any messages after a dialog complited. is reserved by BYE
message until a dialog is completed.
For example, the sequence which is needed consideration is reception
of the REFER signal.
It is shown in 2.4 of a semi-regular draft.
When receiving signals, such as REFER which effects on a dialog, after
a BYE message transmitted, I think it reasonable to answer so that a
dialog may not exist.
I want to add a description as discussed above about disappearance of a
dialog to a description of section 2.4 of a semi-regular draft.
Please point out, if I misunderstood RFC3261.
Let me know if you have any other comments to this proposal.
Thank you very much for your cooperaqtions.
Miki Hasebe,
---------------------------------------------------------
Miki HASEBE
Research and Development Center
NTT-east Corporation
Telephone +81 3 5359 5104
Facsimile +81 3 5359 4768
E-mail: [EMAIL PROTECTED]
19-2 Nishi-shinjuku 3-chome Shinjuku-ku Tokyo 163-8019 Japan
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