SIGBED

In this paper a method of collision detection and retransmission of broadcast packets is proposed. In multi-hop wireless networks, broadcasting is an elementary part of the routing process. However, due to the hidden node problem, broadcasting often ...

The growing complexity of applications, combined with constant quality and time-to-market constraints, creates new challenges for performance engineering practices in the area of real-time embedded systems. It is namely expected that delivered products ...

Chip multiprocessors (CMP) computing systems are usually employed to facilitate many specific applications including medical image processing, computer vision, and aerospace. In these computation-intensive applications, nested loops take the most ...

In this paper, we introduce middleware architecture to support hybrid thread level parallelism on heterogeneous multicore architectures, called Heterothread. Heterothread constructs a hierarchical level model for user programming and parallel task ...

Cloud computing with virtualization technologies has become a huge trend which attracts academia and information technology industries because of its cost-efficiency. It has changed paradigms of development, release, and maintenance of diverse types of ...

In recent years, we have seen a proliferation of small, embedded, electronic devices controlled by computer processors as powerful as the ARM®. These devices are now responsible for tasks as varied as flying a plane, talking on a cellphone, or helping ...

In this paper, we explore improving the schedulability and energy performance for real-time systems with (m, k)-constraints, which require that at least m out of any k consecutive jobs of a task meet their deadlines. The preliminary results demonstrated ...

This work proposes an online DVS approach for OLED-based mobile video applications to reduce display power consumption. A time-efficient representative-region based DVS scheme is developed and applied in MPEG video streaming. Based on the proposed ...

The purpose of real-time locking protocols is to limit priority inversions [5], which, intuitively, occur when a high-priority task is delayed by a lower-priority task. Such locking-related delay, also called priority inversion blocking (pi-blocking), ...

Hard real-time task models have evolved from periodic models to more sophisticated graph-based ones like the Digraph Real-Time Task Model (DRT) [1]. These models have in common that tasks are sequential in nature and do not allow for forking structures, ...

Although fixed priority (FP) scheduling is the most popular online scheduling policy in industrial environments, the earliest deadline first (EDF) policy is starting to get more attention, given its benefits in terms of increased resource usage. A ...

Intelligent Transportation Systems (ITS) usage has transformed public transports' vision on operation management. However, the lack of common communication interfaces has brought redundancy within on-board applications. In this context, the European Bus ...

Cyber-physical systems (CPS) [4] are characterized by combining computations, networks, and physical processes. Engineering cyber-physical systems is not new; high-end automobiles have for decades included complex embedded systems that interact with the ...

The opportunities and challenges for using wireless interconnects for safety-critical avionics have been discussed in our previous work. A Wireless Avionics Network (WAN) has been proposed based on hybrid architecture UWB and Switched Ethernet with ...

In this work, we propose a reliability-aware energy minimization scheme that can satisfy the window-constraints, i.e., no more than x_i deadlines are missed in each nonoverlapped sequence of y_i jobs in real-time task τ_i. The simulation reveals that our ...

With exponentially increased transistor density on multi-core platforms, the power explosion and consequently soaring chip temperature have become critical challenges for system designers. Moreover, the increasing chip temperature results in higher ...

Due to their enhanced mobility and reduced configuration and maintenance cost, wireless control systems (WCSs) are widely used in process and vibration control systems, on medical devices, unmanned vehicles and robotics. However, most literatures in ...

Existing multiprocessor real-time scheduling algorithms follow partitioning/global scheduling approaches or some hybrid approaches of the two. Under partitioning, all tasks are assigned to specific processors. Under global scheduling, tasks may migrate ...

Model-based development of software architecture for real-time embedded systems in modern vehicles has had a surge in the last few years. While the introduction of models into the development of real-time embedded systems has increased efficiency in ...

Intermittent faults are an increasingly challenging difficulty in embedded and real-time systems. As process technologies shrink circuitry, it becomes increasingly susceptible to transient faults from radiation sources such as cosmic rays. Additionally, ...

This paper describes ongoing work on making the deployment and configuration functionality for cyber physical systems reliable and tolerant to failures, while also supporting predictable and incremental online redeployment and reconfiguration of ...

Vehicles involved in urban commutes are subjected to highly variable loads as they traverse varying gradients and stop-and-go traffic. Electric Vehicles can achieve a high efficiency under these conditions due to their ability to recover energy during ...

Simulation engines for buildings can be realistic and accurate, but only provide basic control interfaces. Control engineers have developed robust and complex controls for energy-efficient building operation though such methods are often based on ...

In this paper, we investigate a mechanism for handling resource sharing among tasks under a server-based scheduling technique in multiprocessor platforms, which combines partitioned and global scheduling to benefit a better scheduling method compared to ...

Hard real-time multiprocessors scheduling has recently seen the flourishing of semi-partitioned scheduling algorithms -- a category of scheduling schemes that combine elements of partitioned and migrative scheduling to allow more efficient processor ...