—In this paper, we propose a novel communication paradigm called group-oriented communication. Different from conventional unicast-based communications, group-oriented communication is entirely based on group-based communication. Our group-oriented communication is essentially a type of many-tomany communication, but it realizes any type of communications including one-to-one, one-to-many, many-to-one and many-tomany communications based on group-based communication. With our group-oriented communication, diverse social activities can be shifted into a communication network in a straightforward way, and users’ requirements on security/reliability can be fulfilled. In this paper, we first qualitatively discuss advantages of our group-oriented communication by comparing with the conventional IP-based network. We then discuss four design goals of a network architecture for our group-oriented communication: supporting dynamic entity/group, supporting address operation expression, rea...