Machine-to-Machine (M2M) communication is expected to grow in networks of the future, where massive numbers of low cost, low function M2M terminals communicate in many-to-many manner in an extremely mobile and dynamic environment. We propose a network architecture called Data-centric Network (DCN) where communication is done using a data identifier (ID) and the dynamic data registered by mobile terminals can be retrieved by specifying the data ID. DCN mitigates the problems of prior arts, which are large size of routing table and transaction load of name resolution service. DCN introduces concept of route attraction and aggregation in which the related routes are attracted to an aggregation point and aggregated to reduce routing table size, and route optimization in which optimized routes are established routes to reduce access transaction load to the aggregation points. These allow the proposed architecture to deal with ever increasing number of data and terminals with frequent mobility and changes in data.

To achieve platform-independent network virtualization among multiple service infrastructures in service providers' data centers, we propose hardware gateway-based data center network virtualization architecture where we place a gateway on each service infrastructure and interconnect them using overlay network virtualization. By considering a type of VXLAN gateway for this architecture, integration method with server virtualization environment and management mechanism for virtual network among service infrastructures, we propose the implementation method of our proposed architecture. We evaluated and confirmed feasibility of the proposed architecture based on our prototype. We also confirmed that the proposed architecture does not have any performance issue on our network throughput measurement evaluation.

This paper presents a concept of the Energy Efficient and Enhanced-type Data-centric Network (E 3 -DCN). For future network technology, the Contents-centric Network (CCN) is widely studied. DCN is an extended version of CCN. M2M communication and mobility of the data are supported.In the enhanced-type DCN, a user requests data name or identifier to the network. If the exactly matched requested data are not found in the network, the network constructs the requested data. E 3 -DCN provides an energy efficient contents delivery network on the network virtualization platform.

Wide area distributed cloud computing, where data are processed and stored at micro datacenters (P PDCs) located around terminals, improves response time and reduces the amount of traffic in wide area networks. However, it is difficult for the cloud to maintain service in the case of PDC failure because the robustness of PDCs is substantially lower than that of conventional DCs. We propose a flow control system that transfers the flow to other PDCs by converting the L2, L3, and L4 headers of received packets via OpenFlow when PDC failures occur. The proposed system enables flow to be transferred to other PDCs even from M2M terminals such as sensors that are unable to change the destination IP address. We also developed a distributed control system to solve the critical problem of switching delay caused by the packet-in mechanism used when applying the OpenFlow to the distributed cloud. Emulation results showed that throughput in the distributed control became stable 12 times as quickly as that in the centralized control when flow was transferred.

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