New Generation Network Architecture


ZNA (Z Network Architecture) is a new generation network architecture for the future internet. ZNA has a six-layered architecture, which has Layer-5 between application layer and transport layer. As other features, ZNA has ID/Locator-split protocol called ZNP (Z Network Protocol), the support for mobility and multihoming by ZNP, and the inter-node cross layer cooperation.

Layer-5 in ZNA

In ZNA, Layer-5 (L5) privides with applications with highly functional communication paths (L5-paths) such as a L5 bundled path as a model of multipath that bundles multiple L4-paths for bandwidth aggregation or fault tolerance, a L5 spatially-spliced path as a model of a path with middleboxes that splices spatially-divided L4-paths at a middlebox, and a L5 temporally-spliced path as a model of a path for delay tolerant communication that splices L4-paths not existing at the same time.

Information-Centric Networking

ZINK: Information-Centric Networking Based on Layered Network Architecture

ZINK is an information centric networking mechanism on ZNA focusing on content retrieval by a server-location independent content name considering the current Internet usage. It realizes fast and highly available content retrieval and traffic reduction in the network core by choosing content delivery servers dynamically.

Knowlege Base System in Wide Area Network


KANVAS (Knowledge base system in wide Area Networks with general Versatility, Availability and Scalability) is an open data oriented information sharing infrastracture based on knowledge base technology. It opens up another world of network management such as inference of failure causes using network knowledge ontology and better communication quality considering network situation.

Internet Access in High-speed Trains

The broadband Internet in trains

To provide broadband Internet connectivity to passengers in a high speed train, we study a network system using infrared communication and mobile IP technology. In particular, we analyze appropriate network topologies by simulations and develop a handover method with fewer packet loss.

Communication Protocol for 5G

Current mobile core networks manage each mobile terminal individually, and do not support terminal mobility collectively. This research proposes a method that manages a set of terminals as a mobile network (moving cell) efficiently by prefix delegation or ID/Locator-split.