[Sip] Reg. session timer+earlyupdate

[Harbhanu <[e-mail]>]

Hi,

We were unable to locate the specific behavior of session timer handling in
UA, for the following scenario:

 

1. UE1 --- INVITE SE-1800 --> UE2

2. UE1 <--- 183 ------------------ UE2

 

3. UE1 --- UPDATE SE-600 --> UE2

4. UE1 <--- 200 UPDATE -SE600 -- UE2

 

5. UE1 <--- 200 INVITE SE-1800 -- UE2

 

6. UE1 -------------------------  BYE --> UE2

7. UE1 <--- BYE 200 ------------------ UE2

 

 

Here, UE1 sends a BYE since UE2(UAS) has increased the value of session
expires, which it MUST NOT (4028-Section-9, Page-16).

 

Please let me know whether this behaviour is correct or not.

 

Thanks in advance.

 

Regards,

Harbhanu

 

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