diff --git a/TS-0019-Abstract_Test_Suite_&_implementation_eXtra_Information_for_Test.md b/TS-0019-Abstract_Test_Suite_&_implementation_eXtra_Information_for_Test.md
index 2898ee596f0474ca1a8537bc769b2fd147b90017..d4d296afb21b29a6af435b05dedc990720e5d3b2 100644
--- a/TS-0019-Abstract_Test_Suite_&_implementation_eXtra_Information_for_Test.md
+++ b/TS-0019-Abstract_Test_Suite_&_implementation_eXtra_Information_for_Test.md
@@ -371,6 +371,8 @@ The Upper Tester Application in SUT can be implemented as an embedded source cod
 
 The upper tester triggering message is used to transport control commands between Test System and the Upper Tester Application. The control command will contain essential parameters that are required for certain test case.
 
+Some changes here. 
+
 The upper tester triggering message type maps to particular message formats for exchanging data and those message formats are defined by TTCN-3 primitive as shown at table 5.4.2.2.1-1, UtTrigger and UtTriggerAck primitive.
 
 
@@ -442,7 +444,7 @@ Table 5.4.2.2.2-1 defines UtTrigger and UtTriggerAck primitives including oneM2M
 
 
 ##### 5.4.2.2.3 Control Communication Protocol
-Protocol used for proceeding communications between Test System and Upper Tester Application is designated to the Hypertext Transfer Protocol (HTTP) protocol owning it is an application protocol that is widely supported by most all IoT devices and various intrinsic features such as persistent connection, ease of programming, flexibility, etc.
+Protocol used for proceeding communications between Test System and Upper Tester Application is designated to the Hypertext Transfer Protocol (HTTP) or CoAP protocol owning it is an application protocol that is widely supported by most all IoT devices and various intrinsic features such as persistent connection, ease of programming, flexibility, etc.
 
 
 ##### 5.4.2.2.4 Control Message Serialization