Yu Miyoshi

Proposal and Verification of Flexible Interface Mapping Technique for Automatic System Cooperation Based on Semantics

These days, many companies are executing their business aims based on decentralized cooperation of software components which work on various systems over a network. However, messages and processes between systems are designed individually in each operations division. Therefore, the system development for adjusting interfaces is expensive, so the companies cannot introduce their services in a dynamic business environment. To resolve such problems, we propose interface modeling technique and message mapping technique which model the relationship between the message formats and semantics on the formats by using Web Ontology Language (OWL) and execute the mapping between the message formats by using semantics. We developed the user interactive message mapping tool and evaluated our proposed methods based on the interface specifications of real network management systems.

Methods for Rapidly Testing Node Reachability with Congestion Control and Evaluation

Most ISPs and telecom carriers test reachability to their nodes and interfaces by SNMP or ICMP echo. However, testing for on the order of 10,000-100,000 nodes by traditional techniques takes a long time. Furthermore, huge numbers of short packets occupy the capacity of the links and interfere with other flows. At this time, test software using traditional techniques cannot distinguish whether the reason for packet loss is unreachability or congestion. We should use methods for sending many packets, a congestion detection method, and congestion control method when we test for node reachability. By using these methods, ISP and telecom carriers will obtain reliable results. In this paper, we report such methods and experimental results of this implementation.

Automatic NE-adapter generation by interface blending/diagnosis methods

Operating a next generation network (NGN) while new services and network elements (NE) are being intermittently introduced is a complex and difficult task. We are trying to establish flexible network operation technology. This article introduces a method of automatically generating NE-adapters in element/network management systems (EMS/NMS) to interact with NEs. This method alleviates the effort of NE configuration tasks by automating the development of functions that operators use to set up NEs. We call this interface blending/diagnosis method. Our approach consists of 1) a blending method that automatically generates NE-adapters for products from different vendors from commands and responses between an EMS and an NE and 2) a diagnosis method that verifies blended adapters with actual NEs. Moreover, this article introduces a configuration support tool that we developed. The tool complements the interface blending/diagnosis method even if there is no adapter to be possible to use as knowledge.

Proposal of Flexible Interface Technology for Multidomain/Multivendor Network Management

The expansion of IP broadband services in recent years have prompted various services on IP network infrastructures to be developed in a short time. We propose flexible system cooperation using ontology-mapping technology based on a semantic concept and interface blending/diagnosis technology using script language in a multidomain/multivendor environment

Proposal of operation method for application servers on NGN using unified management environment

The Next Generation Network (NGN) has a multilayer logical construction. Network carriers use various tools in complex procedures to operate application servers on the NGN. We try to establish a method for operating application servers in a unified management environment. This method operates between the network layer, which manages applications. First, we select requirements to achieve a unified management environment for application server operation. Then, we select a test function and a monitoring function from operation functions, in an experiment to confirm the achievability of our method. We test the achievability of two application server functions, which supply web services in the experiments. Our method supplies these functions without programming and manual procedures.