Introducing Database-Centric Support in AUTOSAR

Abstract-We propose to integrate a real-time database management system into the basic software of the AUTOSAR component model. This integration can be performed without violating the fundamental principles of the component-based approach of AUTOSAR. Our database-centric approach allows developers to focus on application development instead of reinventing data management techniques or develop solutions using internal data structures. We use state-of-the-art database pointer techniques to achieve predictable timing, and database proxies to maintain component encapsulation and independence of data-management strategies. The paper illustrates the feasibility of our proposal when database proxies are used to manage the data communication between components and to perform run-time monitoring on the virtual function bus. Our implementation results show that the above benefits do not come at the expense of less accurate timing predictions while only introducing a total application CPU overhead, in the order of 4%

Information Centric Development of Component-Based Embedded Real-Time Systems

This thesis presents new techniques for data management of run-time data objectsin component-based embedded real-time systems. These techniques enabledata to be modeled, analyzed and structured to achieve data managementduring development, maintenance and execution.The evolution of real-time embedded systems has resulted in an increasedsystem complexity beyond what was thought possible just a few years ago.Over the years, new techniques and tools have been developed to manage softwareand communication complexity. However, as this thesis show, currenttechniques and tools for data management are not sufficient. Today, developmentof real-time embedded systems focuses on the function aspects of thesystem, in most cases disregarding data management.The lack of proper design-time data management often results in ineffectivedocumentation routines and poor overall system knowledge. Contemporarytechniques to manage run-time data do not satisfy demands on flexibility,maintainability and extensibility. Based on an industrial case-study that identifiesa number of problems within current data management techniques, bothduring design-time and run-time, it is clear that data management needs to beincorporated as an integral part of the development of the entire system architecture.As a remedy to the identified problems, we propose a design-time data entityapproach, where the importance of data in the system is elevated to beincluded in the entire design phase with proper documentation, properties, dependenciesand analysis methods to increase the overall system knowledge.Furthermore, to efficiently manage data during run-time, we introduce databaseproxies to enable the fusion between two existing techniques; ComponentBased Software Engineering (CBSE) and Real-Time Database ManagementSystems (RTDBMS). A database proxy allows components to be decoupledfrom the underlying data management strategy without violating the componentencapsulation and communication interface.INCENS

INCENSE: Information-Centric Development of Component-Based Embedded Real-Time Systems ∗

This paper summarize the basics concerning my research topic, methodology and a brief description of some related work within the areas of Component Based Software Engineering (CBSE) and Real-Time Database Management Systems (RTDBMS). RTDBMS and CBSE are highly interesting upcoming techniques which both have great benefits. What we will do in our research is to integrate RTDBMS as a part of the CBSE framework. Included in this paper is also some key conferences and interesting references are also presented in this paper. In my research I’m going to look into the problem of how to reduce the ever increasing complexity in today’s embedded real-time systems. The research is aimed at embedded real-time systems in general but specifically to vehicle systems. The project I am involved i

Data Management in Component-Based Embedded Real-Time Systems

This thesis presents new data management techniques for run-time data in component-based embedded real-time systems. These techniques enable data to be modeled, analyzed and structured to improve data management during system development, maintenance, and execution. The foundation of our work is a case-study that identifies a number of problems with current state-of-practice in data management for industrial embedded real-time systems. We introduce two novel concepts: the data entity and the database proxy. The data entity is a design-time concept that allows designers to manage data objects throughout different design and maintenance activities. It includes data-type specification, documentation, specification of timing and quality properties, tracing of dependencies between data objects, and enables analysis and automated validation. The database proxy is a run-time concept designed to allow the use of state-of-the-art database technologies in contemporary software-component technologies for embedded systems. Database proxies decouple components from an underlying database residing in the component framework. This allows components to remain encapsulated and reusable, while providing temporally predictable access to data maintained in a database, thus enabling the use of database technologies, which has previously excluded, in these systems. To validate our proposed techniques, we present a tool implementation of the data entity as well as implementations of the database proxy approach, using commercial tools, the AUTOSAR standardized automotive software architecture, and automotive hardware.  Our results show that the presented techniques can contribute to the development of future component-based embedded real-time systems, by providing structured and efficient data management

A Data-Entity Approach for Component-Based Real-TimeEmbedded Systems Development

In this paper the data-entity approach for efficientdesign-time management of run-time data in componentbasedreal-time embedded systems is presented. The approachformalizes the concept of a data entity which enabledesign-time modeling, management, documentationand analysis of run-time data items. Previous studies ondata management for embedded real-time systems showthat current data management techniques are not adequate,and therefore impose unnecessary costs and quality problemsduring system development. It is our conclusion thatdata management needs to be incorporated as an integralpart of the development of the entire system architecture.Therefore, we propose an approach where run-time datais acknowledged as first class objects during developmentwith proper documentation and where properties such asusage, validity and dependency can be modeled. In thisway we can increase the knowledge and understanding ofthe system. The approach also allows analysis of data dependencies,type matching, and redundancy early in the developmentphase as well as in existing systems.©2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE</p