Oracle Corporation
Methods, systems, and computer readable media for enhanced signaling gateway (SGW) status detection and selection for emergency calls

Abstract:

The subject matter described herein includes a method for enhanced signaling gateway status detection and selection for emergency calls. The method includes, in a mobility management entity (MME) including at least one processor, detecting that a signaling gateway is in a risky state using a combination of echo request and call setup signaling timeouts. The method further includes marking the signaling gateway as risky in a signaling gateway status database maintained by the MME. The method further includes performing signaling gateway selection for an emergency call in a manner that excludes signaling gateways marked as risky. The method further includes routing the emergency call to a signaling gateway selected by the signaling gateway selection.