System and method for prioritizing SIP registrations
AssigneeVerizon Patent and Licensing Inc.
InventorsToby Varughese John, Shashi Kotvali, Bibi M. Hakimzadeh, James S. Abraham
Life of this patent
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Abstract
Systems and methods implement prioritized IP Multimedia System (IMS) registration procedures for Emergency and Priority Service users. A network device in an IMS network, receives, from a user equipment device, a Session Initiation Protocol (SIP) Register message that includes a priority indication. The network device detects the priority indication in the SIP Register message and provides, based on the priority indication, priority registration for the user equipment device when the network device is in an overloaded condition.
Claims20
A method comprising:
- receiving, by a network device in an IP Multimedia System (IMS) network and from a user equipment device, a Session Initiation Protocol (SIP) Register message including a priority indication;
- detecting, by the network device, the priority indication in the SIP Register message;
- and
- providing, by the network device and based on the priority indication, priority registration for the user equipment device when the network device is in an overloaded condition, wherein providing the priority registration comprises:
- prioritizing selection of an Interrogating Call Session Control Function (I-CSCF), and
- forwarding the SIP Register message with the priority indication to the I-CSCF.
A network device, comprising:
- a memory storing instructions;
- and
- a processor configured to execute the instructions to:
- receive, in an IP Multimedia System (IMS) network and from a user equipment device, a Session Initiation Protocol (SIP) Register message including a priority indication;
- detect the priority indication in the SIP Register message;
- and
- provide, based on the priority indication, priority registration for the user equipment device when the network device is in an overloaded condition, wherein providing the priority registration comprises:
- prioritizing selection of an Interrogating Call Session Control Function (I-CSCF), and
- forwarding the SIP Register message with the priority indication to the I-CSCF.
A non-transitory computer-readable medium containing instructions executable by at least one processor, the computer-readable medium comprising one or more instructions to:
- receive, in an IP Multimedia System (IMS) network and from a user equipment device, a Session Initiation Protocol (SIP) Register message including a priority indication;
- detect the priority indication in the SIP Register message;
- and
- provide based on the priority indication, priority registration for the user equipment device when the network device is in an overloaded condition, wherein providing the priority registration comprises:
- prioritizing selection of an Interrogating Call Session Control Function (I-CSCF), and
- forwarding the SIP Register message with the priority indication to the I-CSCF.
Dependencies are inferred from the claim text.