Updated AMF Design Content

Change-Id: I7d1a96bc57f9c680cbdf0e720628121036a4c2ef
diff --git a/design/design-amf.rst b/design/design-amf.rst
index 8359abc..ea12ec6 100644
--- a/design/design-amf.rst
+++ b/design/design-amf.rst
@@ -6,6 +6,10 @@
 
 AMF Design Overview
 ===================
+To make AMF cloud native application enhanced the existing design of AMF. Introduced a new service
+called SctpLb (SctpLoadbalancer) which receives ngap messages and distribute to Amf Instances. Also
+added DB support to Store UE Context. On successful completion of each procedure UE Context
+create/update/delete in MongoDB. AMF is tested with simulated gNB/UEs (gnbsim) for its stability.
 
 .. image:: ../_static/images/CN-AMF.png
   :width: 500px
@@ -23,4 +27,4 @@
 
   * Round-Robin Distribution of Sctp Messages over grpc channel to Backend NF
 
-  * Redirect Support for forwarding to a particular Amf Instance
+  * Redirect Support for forwarding Sctp Messages to a particular Amf Instance