Yes you are right. The UE implementation should support the case without Service-Route in 200 OK for REGISTER to achieve maximum compatibility. It can just send the SIP Reqeust to P-CSCF and let P-CSCF discover the routing to home network.
Peili 2007/9/4, Goyal, Amit <[EMAIL PROTECTED]>: > > Defiantly it is valid, because there may be SBC in between UE and PCSCF > In this case SBC will absorb all the service routes, Path coming from > PCSCF Side. > > And in PDP on DHCP IP of SBC will be published, So UE will assume SBC as > outbound proxy, But again the question come will there be route header > or not in INVITE from UE :-) > > Regards, > Amit Goyal > > >-----Original Message----- > >From: Vikram Chhibber [mailto:[EMAIL PROTECTED] > >Sent: Monday, September 03, 2007 8:18 PM > >To: Peili Xu > >Cc: Goyal, Amit; [email protected] > >Subject: Re: [Sip-implementors] Route Header in INVITE. > > > >Hi Peili, you should be right but can you point me to the spec. where > >this is specified explicitly? Is there any 3gpp test suite behavior > >for this case? I understand that 3gpp has defined behavior for PCSCF > >when INVITE is received with Route headers and its validation, but > >where have they specified the behavior when it's missing? > >In general, should we go implementing a very strict compliant solution > >or follow the SIP philosophy in general of "Be lenient in what you > >expect and strict in what you send?". > > > >Thanks, > >~Vikram > > > >On 9/3/07, Peili Xu <[EMAIL PROTECTED]> wrote: > >> I don't think in the IMS specification, 200 without Service-Route > >> header is an valid case. > >> > >> Peili > >> > >> 2007/9/3, Vikram Chhibber <[EMAIL PROTECTED]>: > >> > Depending on the implementation, option one is also correct as > PCSCF > >> > is considered as the outbound proxy whose address is not specified > in > >> > the Route header. > >> > But the basic point is, if UE does not know the path to SCSCF, it > can > >> > send the message to its outbound proxy i.e. PCSCF which knows how > to > >> > forward the message to calling party home network. > >> > > >> > On 9/3/07, Goyal, Amit <[EMAIL PROTECTED]> wrote: > >> > > Hi, > >> > > > >> > > > >> > > > >> > > In IMS environment if we get 200 OK for REGISTER without > Service-Route, > >> > > Then what should be the Route set for out going INVITE ? > >> > > > >> > > > >> > > > >> > > 1. No Route > >> > > > >> > > OR > >> > > > >> > > 2 Route with only P-CSCF Address > >> > > > >> > > > >> > > > >> > > Or something else. > >> > > > >> > > > >> > > > >> > > Regards, > >> > > > >> > > Amit > >> > > > >> > > _______________________________________________ > >> > > Sip-implementors mailing list > >> > > [email protected] > >> > > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > >> > > > >> > _______________________________________________ > >> > Sip-implementors mailing list > >> > [email protected] > >> > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > >> > > >> > > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
