Assigning a serving-CSCF during access authentication

An authentication server for assigning a serving-call session control function (serving-CSCF) to an access terminal, comprising:

• a memory operable to store information about the access terminal;
• and
• a processor in communication with the memory and operable to:
• receive an access authorization request corresponding to the access terminal;
• authorize the access terminal;
• assign a serving-CSCF to the access terminal during access authorization and prior to receiving a registration request initiating registration, the serving-CSCF having a serving-CSCF address, the assigning performed independently of an interrogating-CSCF;
• and
• send an access authorization response comprising the serving-CSCF address to the access terminal during access authorization, the serving-CSCF address included in the registration request received during registration, the registration initiated by the access terminal after the access authorization.

A non-transitory computer-readable storage medium storing logic for assigning a serving-call session control function (serving-CSCF) to an access terminal, the logic operable to:

• receive an access authorization request corresponding to the access terminal;
• authorize the access terminal;
• assign, by an authentication server, a serving-CSCF to the access terminal during access authorization and prior to receiving a registration request initiating registration, the serving-CSCF having a serving-CSCF address, the assigning performed independently of an interrogating-CSCF;
• and
• send an access authorization response comprising the serving-CSCF address to the access terminal during access authorization, the serving-CSCF address included in the registration request received during registration, the registration initiated by the access terminal after the access authorization.

A system for assigning a serving-call session control function (serving-CSCF) to an access terminal, comprising:

• means for receiving an access authorization request corresponding to the access terminal;
• means for authorizing the access terminal;
• means for assigning, by an authentication server, a serving-CSCF to the access terminal during access authorization and prior to receiving a registration request initiating registration, the serving-CSCF having a serving-CSCF address, the assigning performed independently of an interrogating-CSCF;
• and
• means for sending an access authorization response comprising the serving-CSCF address to the access terminal during access authorization, the serving-CSCF address included in the registration request received during registration, the registration initiated by the access terminal after the access authorization.