Update FEATURE_SET.md with F1 handover procedures

doc/F1AP/F1-design.md

@@ -59,8 +59,8 @@ This is the current status:
   * SA
   * Single cell per DU
   * Multiple DUs connected to one CU (both CP and UP)
+  * Mobility between DUs connected to a single CU
 - Not supported:
-  * Mobility
   * NSA
 
 ## F1-C

doc/FEATURE_SET.md

@@ -137,6 +137,7 @@ These modes of operation are supported:
   - evaluation of CQI report
 - MAC scheduling of SR reception
 - Support of up to 16 UEs (can be increased to 32)
+- Intra-frequency handover
 
 ## gNB RLC
 
@@ -221,6 +222,7 @@ These modes of operation are supported:
 - Interface with RRC
 - Interface with GTP-u (tunnel creation/handling for F1-U interface)
 - One CU(-CP) can handle multiple DUs
+- Support for intra-CU mobility (across DUs)
 
 ## gNB E1AP