Testbed

About: Testbed is a research topic. Over the lifetime, 10858 publications have been published within this topic receiving 147147 citations. The topic is also known as: test bed.

SensorScope: Experiences with a Wireless Building Monitoring Sensor Network

Abstract: This paper reports on our experience with the implementation, deployment, and operation of SensorScope, an indoor environmental monitoring network. Nodes run on standard TinyOS components and use B-MAC for the MAC layer implementation. The main component on the server side is a Java application that stores sensor data in a database and can send broadcast commands to the motes. SensorScope has now been running continuously for 6 months. The paper presents an analysis of three 2 week periods and compares them in terms of parameter settings, and their impact on data delivery and routing tree depth stability. From the data gathered, we show that network performance is greatly improved by using MAC layer retransmissions, that SensorScope is running in a none congested regime, and we find an expected mote lifetime of 61 days. The phenomena discussed in this paper are well known. The contribution of this paper is an insight to a long running sensor network that is more realistic than a testbed with a wired back-channel, but more controllable than a long-term, remote experiment.

Software-defined underwater acoustic networks: toward a high-rate real-time reconfigurable modem

Abstract: We review and discuss the challenges of adopting software-defined radio principles in underwater acoustic networks, and propose a software-defined acoustic modem prototype based on commercial off-the-shelf components. We first review current SDR-based architectures for underwater acoustic communications. Then we describe the architecture of a new software-defined acoustic modem prototype, and provide performance evaluation results in both indoor (water tank) and outdoor (lake) environments. We present three experimental testbed scenarios that demonstrate the real-time reconfigurable capabilities of the proposed prototype and show that it exhibits favorable characteristics toward spectrally efficient cognitive underwater networks, and high data rate underwater acoustic links. Finally, we discuss open research challenges for the implementation of next-generation software-defined underwater acoustic networks.

Development of the CODER system: a testbed for artificial intelligence methods in information retrieval

Abstract: The CODER ( Co mposite D ocument E xpert/Extended/Effective R etrieval) system is a testbed for investigating the application of artificial intelligence methods to increase the effectiveness of information retrieval systems. Particular attention is being given to analysis and representation of heterogeneous documents, such as electronic mail digests or messages, which vary widely in style, length, topic, and structure. Since handling passages of various types in these collections is difficult even for experimental systems like SMART, it is necessary to turn to other techniques being explored by information retrieval and artificial intelligence researchers. The CODER system architecture involves communities of experts around active blackboards, accessing knowledge bases that describe users, documents, and lexical items of various types. The initial lexical knowledge base construction work is now complete, and experts for search and time/date handling can perform a variety of processing tasks. User information and queries are being gathered, and a simple distributed skeletal system is operational. It appears that a number of artificial intelligence techniques are needed to best handle such common but complex document analysis and retrieval tasks.