Research trends of redesigning internet architecture

The Internet has evloved as various new technologies have been added like "patchwork". Through the apprehensions that the Internet will fail if this condition continues, an idea about redesigning the Internet from scratch appeared (the clean slate approach) in the beginning of 2000s. In this paper, the networks based on the clean slate approach are called "the New Generation Networks." This paper introduces several research projects about the New Generation Networks from the viewpoints of (1) network architecture, (2) network virtualization, and (3) ultra high-speed network.