Study on IMS resiliency
The present document investigates and identifies enhancements on 5GS and IMS to support the network resiliency. The document will focus on the following aspects:
-	Study and identify IMS congestion scenarios and whether lack of coordination between UE and network exacerbates the congestion
-	Study whether the current standardised solutions can work for the identified scenarios or not
-	If the existing solutions cannot work for the identified scenarios, then study new potential solutions