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In the process of China's automated production, the upgrading and networking of old infrastructures becomes one of the key issues. With large quantity, numerous varieties and wide distribution, these infrastructures brings complex design work and high cost to network them into fieldbus, which greatly hamper the building of intelligent factories. This paper proposed an industrial-control solution to...
In this paper, we propose a multiple schedules based channel access method for enhancing channel utilization in VANET. We have defined four different scheduled time periods to access to the control channel which is called a phase. Each sync interval has four phases, and each phase has a listen period and access period. In our mechanism some nodes are in listen period, some are in access period so...
Traditional distributed embedded systems are configured using static environment information and thus do not support dynamic behavior of the system. The necessary flexibility in the system may be provided by the Flexible Time-Triggered (FTT) communication paradigm. If, in addition, it is required that the system operates continuously, the suitable fault tolerance mechanisms that provide high reliability...
Traditionally, distributed embedded systems have been designed using static approaches, i.e., assuming a static environment. However, when the environment is dynamic and imposes changing requirements on the system, flexible approaches are needed. If in addition the system must operate continuously, then high reliability is also required. The necessary flexibility for real-time requirements may be...
The research and development on in-vehicle networks (IVNs) is driven by two main requirements: bandwidth and robustness. In this paper we address the robustness requirement. We focus on FlexRay IVNs that are used for safety-critical applications. We analyze and discuss faults that may affect the startup and operation of a FlexRay network. These failures may not only occur during the startup phase...
In this paper, we study time-triggered distributed systems where periodic application tasks are mapped onto different end stations (processing units) communicating over a switched Ethernet network. We address the problem of application level (i.e., both task- and network-level) schedule synthesis and optimization. In this context, most of the recent works [10], [11] either focus on communication schedule...
Reliable flooding in wireless sensor networks (WSNs) is desirable for a broad range of applications and network operations, and has been extensively investigated. However, relatively little work has been done for reliable flooding in low-duty-cycle WSNs with unreliable wireless links. It is a challenging problem to efficiently ensure 100% flooding coverage considering the combined effects of low-duty-cycle...
The deployment of integer optimisation based model predictive control (MPC) for the control of power electronic applications has been limited by the computational burden of the scenario tree exploration and the required fast cycle times. The recent technology trend towards multi-core control platforms offers new possibilities for enabling MPC for power converters. We propose a static scheduling method...
Ethernet switches are increasingly used in real-time distributed systems as a technical solution to guarantee the timeliness in communications. However, there are still limitations related to real-time behavior caused by the limited number of priority levels and the possibility of memory overruns with consequent message losses. These limitations can be eliminated using a master/slave technique such...
Many applications contain loops with an undetermined number of iterations. These loops have to be parallelized in order to increase the throughput when executed on an embedded multiprocessor platform. This paper presents a method to automatically extract a parallel task graph based on function level parallelism from a sequential nested loop program with while loops. In the parallelized task graph...
With the continued demand for more and innovative functions in series automobiles, significantly higher data-rates and more reliable communication are necessary than traditional automotive bus systems, e.g., the controller area network (CAN), provide. In this paper, we present a novel hardware device for FlexRay networks, which splits the bus into separate branches and operates as a selective central...
Based on the analysis to the phenomenon and methods of denial-of-sleep attacking in wireless sensor network, a scheme is proposed employing fake schedule switch with RSSI measurement aid. The sensor nodes can reduce and weaken the harm from collision, exhaustion and broadcast attack and on the contrary make the attackers lose their energy quickly so as to die. Simulation results show that at a bit...
TTEthernet is a novel communication infrastructures that allows using a single physical communication infrastructure for distributed applications with mixed-criticality requirements, e.g. the command and control systems and audio/video systems. This is achieved via a fault-tolerant self-stabilizing synchronization strategy, which establishes temporal partitioning and, hence, ensures isolation of the...
This paper is concerned about multitasking embedded software development from the system specification to the final implementation including design space exploration(DSE). In the proposed framework, dataflow model is used for task specification. Multitasking software is generated for the performance evaluation of architecture candidates during the DSE process. Since the same code is also used for...
This paper considers an alternative strategy to speed up the circuit simulation. This strategy considers characteristics of simulator users' behaviors and involves two techniques, the incremental simulation and simulation-on-demand (SOD). These techniques are implemented in an "Interactive Simulation Environment" to dramatically accelerate the simulation speed in most practical cases. Also,...
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