Hi, I am trying to determine an IMS UE behavior on receiving a 504 response to a re-REGISTER request. I have read the 3gpp TS 24.229 and it is ambiguous as to what the UE should do.
*On receiving a 504 for the REGISTER, does the UE send the initial REGISTER back to the same PCSCF or to a different PCSCF?* Here excerpts from the 3gpp TS 24.229version c20. *--------Section 5.1.1.2. Initial Registration --------* "On receiving a 408 (Request Timeout) response or 500 (Server Internal Error) response or 504 (Server Time-Out) or 600 (Busy Everywhere) response for an initial registration, the UE may attempt to perform initial registration again." *--------Section 5.1.1.4 User initiated reregistration and authentication-------* "On receiving a 408 (Request Timeout) response or 500 (Server Internal Error) response or 504 (Server Time-Out) response for a reregistration, the UE shall perform the procedures for initial registration as described in subclause 5.1.1.2." *-------- Section 5.1.2.A Abnormal Case - non REGISTER methods ------- * "If the UE has discovered multiple P-CSCF addresses and has information that the P-CSCF was unable to forward the request resulting in sending back the 504 (Server Time-out) response, when starting the initial registration it is appropriate for the UE to select a P-CSCF address different from the one used for the registration binding on which the 504 (Server Time-out) response was received." Thanks RC _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
