The requirement for rapid services creation and deployment in NGN becomes more and more urgent

which requires further open service features in the precondition of the openness of network capabilities. This paper analyzes the two main standards bodies including 3GPP and OMA which are related to the work on the services deployment and control of NGN. This paper describes the mechanism of 3GPP IP multimedia subsystem acting as the uniform services control platform of NGN

and then analyzes the conception of OMA service environment （OSE）

the relationship of OSE and IMS is detailed described subsequently. Finally PTT over Cellular （PoC） is illustrated to clarify the NGN services deployment mode and the relationship of different service enablers.