Emergency call handling within IP multimedia system (IMS) networks
AssigneeT-Mobile USA, Inc.
InventorsMayank Kaul, Shujaur Rehman Mufti
Life of this patent
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Abstract
Systems and methods are described herein for handling E911 communications within IMS networks, such as Voice over LTE (VoLTE) networks. In some embodiments, the systems and methods, via various communication nodes, handle or otherwise govern emergency calls within the VoLTE network, by sending an INVITE message from a sender node of the VoLTE network to a recipient node of the VoLTE network, and starting a retry timer at the sender node that is specific to handling E911 calls by the VoLTE network.
Claims20
A system for a communication node of a telecommunications network, the system comprising:
- a connection module, comprising a processor, that sends INVITE messages to at least one recipient node in response to receiving call provisioning requests;
- and
- a timer module, comprising a processor, that sets a generic call specific retry timer and an E911 call specific retry timer, wherein the generic call specific retry timer and the E911 call specific retry timer are stored in memory:
- wherein the generic call specific retry timer is for generic calls placed to the telecommunications network, and
- wherein the generic call specific retry timer is associated with receiving acknowledgement messages from the recipient node of sent INVITE messages that are based on the generic calls placed to the telecommunications network;
- and
- wherein the E911 call specific retry timer is associated with E911 calls placed to the telecommunications network,
- wherein the E911 call specific retry timer is associated with receiving acknowledgement messages from the recipient node of sent INVITE messages that are based on the E911 calls placed to the telecommunications network.
At least one non-transitory, computer-readable medium carrying instructions, which when executed by at least one data processor, executes operations, the operations comprising:
- sending INVITE messages in a telecommunications network to at least one recipient node in response to receiving call provisioning requests;
- and
- setting a generic call specific retry timer for generic calls placed to the telecommunications network,
- wherein the generic call specific retry timer is associated with receiving acknowledgement messages from the recipient node of sent INVITE messages that are based on the generic calls placed to the telecommunications network;
- and
- setting an E911 call specific retry timer associated with E911 calls placed to the telecommunications network,
- wherein the E911 call specific retry timer is associated with receiving acknowledgement messages from the recipient node of sent INVITE messages that are based on the E911 calls placed to the telecommunications network.
A method, comprising:
- sending INVITE messages in a telecommunications network to at least one recipient node in response to receiving call provisioning requests;
- and
- setting a generic call specific retry timer for generic calls placed to the telecommunications network,
- wherein the generic call specific retry timer is associated with receiving acknowledgement messages from the recipient node of sent INVITE messages that are based on the generic calls placed to the telecommunications network;
- and
- setting an E911 call specific retry timer associated with E911 calls placed to the telecommunications network,
- wherein the E911 call specific retry timer is associated with receiving acknowledgement messages from the recipient node of sent INVITE messages that are based on the E911 calls placed to the telecommunications network.
Dependencies are inferred from the claim text.