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US 10,567,581 B2Granted
IMS emergency call routing techniques
AssigneeApple Inc.
InventorsAlexandre Saso Stojanovski, Frederick Joly, Jerome Parron
Life of this patent
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AssigneeApple Inc.
InventorsAlexandre Saso Stojanovski, Frederick Joly, Jerome Parron
Estimating the term…
IMS emergency call routing techniques are described. In one embodiment, for example, an apparatus may comprise at least one memory and logic for a P-CSCF node, at least a portion of the logic comprised in circuitry coupled to the at least one memory, the logic to cause the P-CSCF node to receive an SIP INVITE message from a roaming UE, the SIP INVITE message associated with an attempt to place an emergency call via an unauthenticated IMS session, the logic to cause the P-CSCF node to obtain a PSAP callback number for the UE from a PCRF node via an Rx interface, identify a PSAP callback parameter for the UE based on the PSAP callback number, insert the PSAP callback parameter into the SIP INVITE message, and forward the SIP INVITE message to a PSAP. Other embodiments are described and claimed.
An apparatus, comprising:
Non-transitory computer-readable storage media having stored thereon instructions that, in response to being executed by processing circuitry of a computing device, cause a proxy call session control function (P-CSCF) of an internet protocol multimedia subsystem (IMS) of a public land mobile network (PLMN) to:
Dependencies are inferred from the claim text.