+Control messages might also be exchanged with E2 Simulators that implement REST-based interfaces.
+Traffic Steering then logs the REST response showing whether or not the control operation has succeeded.
+
+The gRPC interface is only required to exchange messages with the RC xApp.
+The following is an example of the gRPC message (*string representation*) which requests the RC xApp to handover a given UE:
+
+.. code-block::
+
+ e2NodeID: "000000000001001000110100"
+ plmnID: "02F829"
+ ranName: "enb_208_092_001235"
+ RICE2APHeaderData {
+ RanFuncId: 300
+ RICRequestorID: 1001
+ }
+ RICControlHeaderData {
+ ControlStyle: 3
+ ControlActionId: 1
+ UEID: "Train passenger 2"
+ }
+ RICControlMessageData {
+ TargetCellID: "mnop"
+ }
+
+TS xApp also requires to fetch additional RAN information from the E2 Manager to communicate with RC xApp.
+By default, TS xApp requests information to the default endpoint of E2 Manager in the Kubernetes cluster.
+Still, the default E2 Manager endpoint from TS can be changed using the env variable "SERVICE_E2MGR_HTTP_BASE_URL".