金田の論文

Kanada, Y., 1st IEEE/IFIP International Workshop on SDN Management and Orchestration (SDNMO 2014), May 2014, http://dx.doi.org/10.1109/noms.2014.6838417
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Abstract – Network virtualization introduces two concepts: slice (i.e., virtual network), which consists of virtual nodes and links, and slice developer, which is the third role in networks. Slice developers can introduce new network services by using slices. A method for introducing new types of virtual nodes and links for new services into the slicedefinition language and the virtualization infrastructure by evolving physical nodes (i.e., “virtualization nodes” or VNodes) is proposed. This evolution consists of two stages: the experimental stage and the operational stage. In the experimental stage, data and control plug-ins are developed and tested by the operator or vendor by using experimental sliver definitions. In the operational stage, which is focused on in this study, the plug-ins are integrated into original components in the infrastructure and are available for slice development by using normal sliver definitions. By mapping type names to plug-in identifiers and parameters, the proposed method enables abstract and simple definitions of slices by slice developers and authorization of plug-ins by the operator, but it remains the loose integration of the new function, i.e., the plug-in architecture used in the experimental stage. Prototyping and evaluation demonstrates that this method greatly simplifies both slice developers’ tasks and operators’ tasks.

研究テーマ紹介: ネットワーク仮想化

Kanada, Y., 2nd International Workshop on Network Management and Monitoring (NetMM 2014), May 2014, http://dx.doi.org/10.1109/waina.2014.112
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Abstract – A network processor (NP) usually contains multiple packet processing cores (PPCs) and a control processing core (CPC), and the synchronization and communication between CPC and PPCs, which is required for controlling an NP, is very complex. To reduce the complexity, a method for controlling packet processing in NPs by using PPCs is proposed. By means of this method, complex control messages are partially processed and divided into simplified control packets by a CPU outside the NP chip, and these packets are sent to a control-processing PPC. The control-processing PPC controls data-processing PPCs by using data-exchange mechanisms, such as a shared memory or an on-chip network, which are more uniform and simpler than those between a CPC and PPCs. This control method is applied to a virtual-link controlprocessing task and packet-processing tasks in a network node with a virtualization function. Both tasks are described by a hardware-independent high-level language called “Phonpl,” and communication between the PPCs is programmed following normal and uniform shared-memory semantics. As a result, programming the control-processing task and porting the program become much easier.

研究テーマ紹介: ネットワーク仮想化