RE: [Sip-implementors] 200 OK retransmissions for INVITE

[Arunachalam Venkatraman]

Title: RE: [Sip-implementors] 200 OK retransmissions for INVITE

Barth

The retransmissions of the final response are unaffected by the retransmission of the INVITE. The final response will retransmit until an ACK is received or the transaction Timer A fires.

 

In RFC2361 (unlike RFC2543), the retransmissions are not counted. They continue until  the timer A fires.

 

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Barth Matan
Sent: Thursday, August 15, 2002 3:34 AM
To: 'Christer Holmberg'; Fuxbruner Amihay
Cc: [EMAIL PROTECTED]; Cohen Shai; Karp Lika; Ramati Nadav; Tur-Zin Shai
Subject: RE: [Sip-implementors] 200 OK retransmissions for INVITE

Let me refrase the Amihai's question:
The scenario is:
UAC ------> INVITE UAS
UAC <------ 200 OK UAS (Timer H started)
UAC <-------200 OK (retransmited) UAS
UAC ------> INVITE(retransmited) UAS

1.On receving the retransmited INVITE should retry mechnism start again ignoring what sent till now and timer H should be restarted when sending the OK?

If not:
2.On receving the retransmited INVITE you should immediatley response with 200 OK does this 200 OK is counted as one of the retransmissions

and the UAS should move to count the next interval (of the 200 OK retransmission)?

Matan.

-----Original Message-----
From: Christer Holmberg [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, August 13, 2002 4:25 PM
To: Fuxbruner Amihay
Cc: [EMAIL PROTECTED]; Barth Matan
Subject: Re: [Sip-implementors] 200 OK retransmissions for INVITE

Hi,

> 3261 implies 200 OK retransmissions for INVITE till we get ACK.
> However, in case we get INVITE retransmission, what is the recommended
> way:
>
> 1. Stop the 200 OK retransmissions and handle new retransmission for
> the new incoming INVITE.
> 2. Continue the 200 OK retransmission for the first INVITE.
> Any other ?

If the INVITE is a retranmission of the first INVITE you just continue
the 200 OK retransmission.

Regards,

Christer Holmberg
Ericsson Finland

>
>
> Thanks,
>
> Amihay Fuxbruner
> System Engineering - Signaling R&D
> Comverse