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One of the most significant concerns in designing on-chip networks is guaranteeing QoS requirements for various applications. In this paper, we propose a buffering method which reduces the router's area and in turn network cost without affecting the QoS issues. The proposed method rather than considering a dedicated buffer for each class of traffic, assigns a single shared buffer on each port to the...
Advanced bit manipulation operations are not efficiently supported by standard microprocessors since they are optimized for fixed data size operations. In literature several hardware solutions are proposed to overcome this problem, and. In this work we present the experimental results of a new architecture based on LEON-2 and a simplified version of ADAPTO (Adder-based Dynamic Architecture for Processing...
Embedded real-time systems are often used in harsh environments, for example engine control systems in automotive vehicles. In such ECUs (Engine Control Unit) faults can lead to serious accidents. In this paper we propose a safety embedded architecture based on coded processing. This framework only needs two channels to provide fault tolerance and allows the detection and identification of permanent...
Decision-making for trading requires a complex infrastructure: technical analysis, fundamental analysis, expert systems indicating propitious moments of operation, and more. However, one very relevant element is usually underestimated: a trader's stress level, which can significantly undermine the trader's capability to think clearly. This paper explains how stress information can be gathered from...
Smart Spaces are an emerging computing paradigm in which various devices of our everyday environment share information autonomously with each other in order to provide services to people in the environment. Achieving reliable way to share information between heterogeneous devices is not an easy process however. Solutions that are independent of application domain and that provide interoperability...
Home networks comprise very heterogeneous devices interconnected through the residential gateway. They deploy complex services networks within the home environment using technologies such as Universal Plug and Play (UPnP). This technology provides the home network clients with a standard for device auto-discovery and transparent interoperability. However, the UPnP standard has an important constraint...
The advantages of component-based systems include reuse of generic components as well as adaption through variants. However, they bare a high risk of containing incompatibilities between components, due to the lack of control over the integration-relevant aspects of their components. Current development processes are able to detect incompatibilities between components only at very late stages of system...
The term embedded systems refers to digital systems including hardware and software co-development for special applications, the most common being networking and control. Because of their individual architecture, their hardware and software development is quite often a very complicated process. Embedded systems involve a wide spectrum of specializations, such as system architecture design, hardware...
Database query languages on relations (for example SQL) make it possible to join two relations. This operation is very common in desktop/server database systems but unfortunately query processing systems in networked embedded computer systems currently do not support this operation; specifically, the query processing systems TAG, TinyDB, Cougar do not support this. We show how a prioritized medium...
This paper presents a performance analysis of JPEG 2000 image compression over a 802.15.4 wireless network. The interdependence among image quality, JPEG 2000 compression parameters and network throughput have been investigated. The objective of the work is to give useful guidelines in the design of image wireless networks over low cost, low power, low rate 802.15.4 wireless protocol.
The paper presents reusable techniques for building a runtime environment for a middleware targeted at heterogeneous sensor/actuator networks (SAN). The SAN is heterogeneous in that nodes differ as to the underlying MCU and OS platform, as well as sensor and actuator resources. Applications destined for the middleware are written in C and then transformed into executables interpreted by a virtual...
This paper focuses on a novel command generator for servo-motor drives to be used as an integral part of their motion controllers. The method, which incorporates a new data compression algorithm, is capable of generating trajectory data at variable rates. In this paradigm, higher-order differences of a given trajectory (i.e. position) are first computed and thus the resulting data are compressed via...
An ultra low area 8-bit subrange Analogue/Digital Converter that consists of a pair of Flash 4-bit converter stages is described in this paper emphasising on the appropriate method for its real time calibration. Its active area occupies only 0.04 mm2 and dissipates less than 22 mW. The sampling rate is higher than 500 MS/s and the achieved Signal to Noise and Distortion Ratio is higher than 40 dB...
Recently great effort has been done in the development of high efficient DC-AC switching power converters for renewable energies and in particular for solar cells. The common algorithm used to control DC-AC switching power converters is Pulse Width Modulation. The present work presents the use of Sigma-Delta modulators for the control of the switches of DC-AC switching power converters. The proposed...
A fundamental issue in the development of a modern electronic design is represented by productivity: the complexity of digital systems is growing so fast that a lot of resources are required for meaningful and efficient design, guaranteeing a feasible time-to-market. Abstraction is an important tool to manage complexity, because it allows to catch the essence of an object, giving less importance to...
The emerging area of body area networks (BAN) imposes challenging requirements on hardware and software to achieve the desired lifetimes for certain devices such as long term medical implants. In this paper, we propose a novel approach to the measurement and characterisation of the energy consumption of BAN devices. The approach uses a low cost energy auditing circuit and addresses the problem of...
In the last decade, wireless sensor networks (WSN) have gained considerable importance and momentum. They are used with a growing diversity of sensors in a plethora of applications, e.g., from Ambient Intelligence (AmI), Assisted Living (AAL) to agriculture. WSN based measurement and instrumentation systems commonly have to operate under tight power consumption constraints. In particular, WSN benefiting...
Network Processors are used at the core of the Internet, providing routers, switches and other essential network devices with the necessary processing power to deliver proper data forwarding and other network related functions (VoIP, security, etc.) at the required level of performance. In this paper, we present a Network Processor architecture, designed to support all the fundamental instructions...
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