By paying attention to tussle's impact on the research of network architecture

a set of design principles for constructing new generation network architecture are summarized in this paper

and then an interaction based

service oriented model of network architecture

INSA

is proposed under the direction of those design principles.Furthermore

the design thinking

general characteristics and formal modeling techniques of INSA model are described and discussed.Maintaining the openness

simplicity and flexibility of the traditional Internet

the INSA model introduces the manageability

controllability

customizability

evolvability and reusability into the new generation network architecture.So it provides good guidance for the research and development of the next generation network.