大規模システムLSI設計のための統一的ハードウェア・ソフトウェア協調検証手法

Currently, the complexity of embedded LSI system is growing faster than the productivity of system design. This trend results in a design productivity gap, particularly in tight development time. Since the verification task takes bigger part of development task, it becomes a major challenge in LSI system design. In order to guarantee system reliability and quality of results (QoR), verifying large coverage of system functionality requires huge amount of relevant test cases and various scenario of evaluations. To overcome these problems, verification methodology is evolving toward supporting higher level of design abstraction by employing HW-SW co-verification. In this study, we present a novel approach for verification LSI circuit which is called as unified HW/SW co-verification framework. The study aims to improve design efficiency while maintains implementation consistency in the point of view of system-level performance. The proposed data-driven simulation and flexible interface of HW and SW design become the backbone of verification framework. In order to avoid time consuming, prone error, and iterative design spin-off in a large team, the proposed framework has to support multiple design abstractions. Hence, it can close the loop of design, exploration, optimization, and testing. Furthermore, the proposed methodology is also able to co-operate with system-level simulation in high-level abstraction, which is easy to extend for various applications and enables fast-turn around design modification. These contributions are discussed in chapter 3. In order to show the effectiveness and the use-cases of the proposed verification framework, the evaluation and metrics assessments of Very High Throughput wireless LAN system design are carried out. Two application examples are provided. The first case in chapter 4 is intended for fast verification and design exploration of large circuit. The Maximum Likelihood Detection (MLD) MIMO decoder is considered as Design Under Test (DUT). The second case, as presented in chapter 5, is the evaluation for system-level simulation. The full transceiver system based on IEEE 802.11ac standard is employed as DUT. Experimental results show that the proposed verification approach gives significant improvements of verification time (e.g. up to 10,000 times) over the conventional scheme. The proposed framework is also able to support various schemes of system level evaluations and cross-layer evaluation of wireless system.九州工業大学博士学位論文 学位記番号：情工博甲第328号 学位授与年月日：平成29年6月30日1 Introduction|2 Design and Verification in LSI System Design|3 Unified HW/SW Co-verification Methodology|4 Fast Co-verification and Design Exploration in Complex Circuits|5 Unified System Level Simulator for Very High Throughput Wireless Systems|6 Conclusion and Future Work九州工業大学平成29年

Toteutus datasynkronisaatiosta haasteellisen verkon ylitse

This thesis is related to the trend of the industrial internet of things. There exists a fair number of product and service examples where a manufacturer has a need for usage data harvesting. The gathered usage data can be used, e.g., in product development. In this thesis the product is mining equipment and its maintenance. Sending the data straight from the mining equipment to the manufacturer is problematic, since mines often lack Internet connection. In some cases mines have local area networks, but in other cases those are not available. The only method of gathering the data can be transportating via USB flash drives or similar. The way the data is moved with the flash drive from the mining equipment to a location with Internet connection is called aided mine network. This location can be, e.g., an office building near the mining area. The core problem of the thesis is the gathering, moving, and synchronization of the usage data using the aided mine network. In this thesis, a plan to implement the gathering of the data is developed. The solution is called DATAMiNe, i.e., Data Aggregation Through Aided Mine Network. The network consists of three parts. The parts are a Manager, an Edge Relay, and a Data Aggregator. DATAMiNe's architecture is designed so that it supports an easy replacement of the aided mine network. Replacement can be a local area network, or an integrated Internet connection in the mining equipment. A communication protocol between the Manager and the Edge Relay is designed so that it supports the special needs of the aided mine network. The development of DATAMiNe starts with an initial plan, which bases on the mining equipment manufacturer's vision, and use cases about unified data gathering into a single Data Aggregator. DATAMiNe is developed by ordinary software design methods, by programming a proof of concept test software, and finally by verifying a protocol with the Spin tools. With Spin, it is possible to formally check the interaction between connected state automata. All development steps play a part towards the next implementation phase. That is, the production implementation. The verification model forces attention to the details that otherwise would be ignored in the design phase. The test program implementation helps to choose the cost effective ways in the design

A Systematic Framework for Radio Frequency Identification (RFID) Hazard Mitigation in the Blood Transfusion Supply Chain from Donation to Distribution

The RFID Consortium is developing what will be the first FDA-approved use of radio frequency identification (RFID) technology to identify, track, manage, and monitor blood throughout the entire blood transfusion supply chain. The iTraceTM is an innovative technological system designed to optimize the procedures currently employed when tracing blood from the donor to the recipient. With all novel technologies it is essential to consider not only the advantages, but also the potential harms that may come about from using the system. The deployment of the iTraceTM consists of two phases: 1) Phase One - application of the iTraceTM from the donor to blood center distribution, and 2) Phase Two - application of the iTraceTM from blood center distribution to transfusion. This dissertation seeks to identify the possible hazards that may occur when utilizing the iTraceTM during Phase One, and to assess the mitigation and correction processes to combat these hazards. A thorough examination of verification and validation tests, as well as of the system design, requirements, and standard operating procedures was performed to qualify and quantify each hazard into specific categories of severity and likelihood. A traceability matrix was also established to link each hazard with its associated tests and/or features. Furthermore, a series of analyses were conducted to determine whether the benefits of implementing the iTraceTM outweighed the risks and whether the mitigation and correction strategies of the hazards were effective. Ultimately, this dissertation serves as a usable, generalizable framework for the management of RFID-related hazards in the blood transfusion supply chain from donor to blood center distribution

Delay-centric handover in SCTP

The introduction of the Stream Control Transmission Protocol (SCTP) has opened the possibility of a mobile aware transport protocol. The multihoming feature of SCTP negates the need for a solution such as Mobile IP and, as SCTP is a transport layer protocol, it adds no complexity to the network. Utilizing the handover procedure of SCTP, the large bandwidth of WLAN can be exploited whilst in the coverage of a hotspot, and still retain the 3G connection for when the user roams out of the hotspot’s range. All this functionality is provided at the transport layer and is transparent to the end user, something that is still important in non-mobile-aware legacy applications. However, there is one drawback to this scenario - the current handover scheme implemented in SCTP is failure-centric in nature. Handover is only performed in the presence of primary destination address failure. This dissertation proposes a new scheme for performing handover using SCTP. The handover scheme being proposed employs an aggressive polling of all destination addresses within an individual SCTP association in order to determine the round trip delay to each of these addresses. It then performs handover based on these measured path delays. This delay-centric approach does not incur the penalty associated with the current failover-based scheme, namely a number of timeouts before handover is performed. In some cases the proposed scheme can actually preempt the path failure, and perform handover before it occurs. The proposed scheme has been evaluated through simulation, emulation, and within the context of a wireless environment

A model-driven approach to the conceptual modeling of situations : from specification to validation

A modelagem de situações para aplicações sensíveis ao contexto, também chamadas de aplicações sensíveis a situações, é, por um lado, uma tarefa chave para o funcionamento adequado dessas aplicações. Por outro lado, essa também é uma tafera árdua graças à complexidade e à vasta gama de tipos de situações possíveis. Com o intuito de facilitar a representação desses tipos de situações em tempo de projeto, foi criada a Linguagem de Modelagem de Situações (Situation Modeling Language - SML), a qual se baseia parcialmente em ricas teorias ontológicas de modelagem conceitual, além de fornecer uma plataforma de detecção de situação em tempo de execução. Apesar do benefício da existência dessa infraestrutura, a tarefa de definir tipos de situação é ainda não-trivial, podendo carregar problemas que dificilmente são detectados por modeladores via inspeções manuais. Esta dissertação tem o propósito de melhorar e facilitar ainda mais a definição de tipos de situação em SML propondo: (i) uma maior integração da linguagem com as teorias ontológicas de modelagem conceitual pelo uso da linguagem OntoUML, visando aumentar a expressividade dos modelos de situação; e (ii) uma abordagem para validação de tipos de situação usando um método formal, visando garantir que os modelos criados correspondam à intenção do modelador. Tanto a integração quanto a validação são implementadas em uma ferramenta para especificação, verificação e validação de tipos de situação ontologicamente enriquecidos.The modeling of situation types for context-aware applications, also called situationaware applications, is, on the one hand, a key task to the proper functioning of those applications. On the other hand, it is also a hard task given the complexity and the wide range of possible situation types. Aiming at facilitating the representation of those types of situations at design-time, the Situation Modeling Language (SML) was created. This language is based partially on rich ontological theories of conceptual modeling and is accompanied by a platform for situation-detection at runtime. Despite the benefits of the availability of this suitable infrastructure, the definition of situation types, being a non-trivial task, can still pose problems that are hardly detected by modelers by manual model inspection. This thesis aims at improving and facilitating the definition of situation types in SML by proposing: (i) the integration between the language and the ontological theories of conceptual modeling by using the OntoUML language, with the purpose of increasing the expressivity of situation type models; and (ii) an approach for the validation of situation type models using a lightweight formal method, aiming at increasing the correspondence between the created models’ instances and the modeler’s intentions. Both the integration and the validation are implemented in a tool for specification, verification and validation of ontologically-enriched situation types.CAPE

Trusted Computing in Mobile Action

Due to the convergence of various mobile access technologies like UMTS, WLAN, and WiMax the need for a new supporting infrastructure arises. This infrastructure should be able to support more efficient ways to authenticate users and devices, potentially enabling novel services based on the security provided by the infrastructure. In this paper we exhibit some usage scenarios from the mobile domain integrating trusted computing, which show that trusted computing offers new paradigms for implementing trust and by this enables new technical applications and business scenarios. The scenarios show how the traditional boundaries between technical and authentication domains become permeable while a high security level is maintained.Comment: In: Peer-reviewed Proceedings of the Information Security South Africa (ISSA) 2006 From Insight to Foresight Conference, 5 to 7 July 2006, Sandton, South Afric