IEEE-1451-based smart module for in-vehicle networking systems of intelligent vehicles
ABSTRACT As vehicles become intelligent for the convenience and safety of drivers, in-vehicle networking (IVN) systems and smart modules are essential components of intelligent vehicles. However, there are obstacles for the wide acceptance of smart modules. First, there exist numerous IVN protocols that a smart module should be able to support. Second, the whole smart module has to be replaced when only the sensor of the module fails. In order to overcome these obstacles, a smart module is implemented as two units; one responsible for network communication and the other for sensor/actuator operations. In addition, the modules use an interface between the two units as defined by the IEEE 1451 standard. This paper presents a design of the smart module based on the IEEE 1451 standard along with the experimental evaluation for time delays.
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ABSTRACT: This paper presents the implementation of an intelligent sensor interface embedded system, compliant with the new IEEE 1451 family of standards for smart networked transducers, integrating on-chip the mixed-signal processing chain plus data fusion and communication digital resources. As application case study, a gas leak detection system for H2-based vehicles is presented. KeywordsMixed-signal embedded systems-Intelligent sensor interface (ISIF)-Gas leak measures-Automotive safety-Sensor networks11/2011: pages 59-73;
- International Journal of Sensor Networks 01/2013; 14(1):50-63.
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ABSTRACT: As time-triggered communication protocols (e.g., TTCAN, TTP, and FlexRay) are widely used on vehicles, the scheduling of tasks and messages on in-vehicle networks becomes a critical issue for offering quality-of-service (QoS) guarantees to time-critical applications on vehicles. This paper studies a holistic scheduling problem for handling real-time applications in time-triggered in-vehicle networks where practical aspects in system design and integration are captured. The contributions of this paper are multi-fold. Firstly, this paper designs a novel scheduling algorithm, referred to as Unfixed Start Time (UST) algorithm, which schedules tasks and messages in a flexible way to enhance schedulability. In addition, to tolerate assignment conflicts and further improve schedulability, this paper proposes two rescheduling and backtracking methods, namely Rescheduling with Offset Modification (ROM) and Backtracking and Priority Promotion (BPP) procedures. Extensive performance evaluation studies are conducted to quantify the performance of the proposed algorithm under a variety of scenarios.IEEE Transactions on Industrial Informatics 08/2014; 10(3):1817-1828. · 3.38 Impact Factor