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This paper presents a novel pulse switching protocol framework for ultra light-weight wireless network applications. The key idea is to abstract a single Ultra Wide Band (UWB) pulse as the information switching granularity. Pulse switching is shown to be sufficient for on-off style event monitoring applications for which a monitored parameter can be modeled using a binary variable. Monitoring such...
In this paper, we present analytical study of routing overhead of reactive routing protocols for Wireless Multihop Networks (WMhNs). To accomplish the framework of generalized routing overhead, we choose Ad-Hoc on Demand Distance Vector (AODV), Dynamic Source Routing (DSR) and Dynamic MANET on Demand (DYMO). Considering basic themes of these protocols, we enhance the generalized network models by...
A calibrated delay line is a key component in many modern digital systems. Traditionally, these lines are designed as real-time pipelines with static granularity, fine enough to handle a worst-case input rate. However, due to their rigid structure, they have sub-optimal energy for low- and varying-rate input streams. We introduce a complete methodology for designing reconfigurable delay lines which...
With the increasing economic development, the number of cars in the city has been increasing continuously. Though some RFID parking lot management systems have been set up, most rely on manual management and efficiency is very low. The major cause is that a well information communication system is not built between the parking lot manager and the parking spaces. In order to solve the problem, a scheme...
Near Field Communication (NFC) is one of the technologies, in conjunction with Bluetooth and 6LoWPAN, which makes feasible the wireless transmission of information from small objects and sensors to Internet-enabled devices. This presents a new technological generation, denominated Internet of Things (IoT), which is able to integrate in Internet the sensors and objects located surround us. Our research...
In the recent years, Phasor Measurement Unit (PMU) based Wide Area Measurement System (WAMS) has been receiving ever increasing attention from the academia as well as from the industry. Power utilities have been designing and implementing WAMS to provide more intelligent monitoring, control, and protection of the power grid. In order to achieve real-time operations in the modern power systems, construction...
Network Virtualization (NV) is one of the most promising technique to enable innovation in today's network. A recent approach toward NV has been proposed through FlowVisor, whose aim is to leverage on the specific features of an OpenFlow-controlled network to share the same hardware forwarding plane among multiple logical networks. However, FlowVisor lacks some features to enable a full implementation...
Vibration is the main reason for earthen sites to deform and collapse. It is necessary to get vibration data for providing basis to further conserving earthen sites. Traditional monitoring methods are not suitable for the earthen sites because it is destructive and unsustainable. We use the technique of wireless sensor network (WSN) to get the vibration data, and delve into how to transmit large amounts...
Wireless sensor networks (WSNs), now-a-days, are deployed in environmental data collection as well as in critical event monitoring. Successful data collection requires reliability while reliable event detection necessitates timeliness. Simultaneous data gathering and event monitoring is not well studied in literature. In this paper, we propose a system model that works on homogeneous data gathering...
To carry out the maintenance and analysis of communication networks, the network maintenance personnel must achieve real-time, accurate collection of signaling data of communication network. But the delay in the actual link signaling data transmission process is inevitable. If not take the delay correction will seriously affect the accuracy of the follow-up signaling message handling. This paper presents...
The smart grid is a brand new power system that incorporates power infrastructures with information technologies. In the smart grid, power devices are interconnected to facilitate various intelligent applications via ubiquitous communications between devices. Currently, communications between equipments are mainly enabled by a centralized supervisory control and data acquisition (SCADA) system. An...
This paper gives out a survey on event monitoring in Event-driven wireless sensor networks (EWSNs). In EWSNs, there are mainly two tasks, one is accurate event detection with higher detection probability and lower false-alarm probability. The other is reliable dissemination of the event information after accurate detection. In this paper, we firstly address the design issues for event detection and...
This paper describes an implementation for monitoring the Quality of Service (QoS) and expecting the Quality of Experience (QoE) of a voice communication in a Real-time Transport Protocol (RTP) based telecommunication environment. The resulting QoS parameters are evaluated, the QoE is determined with the E-Model and processed for graphical presentation. With the use of some open-source programming...
To monitor and diagnose problems on a wide-area network, there is an increasing trend to deploy measurement frameworks such as perfSONAR (Performance focused Service-Oriented Network monitoring Architecture). perfSONAR is a Service-Oriented Architecture (SOA), where a set of elementary functions for multi-domain network monitoring has been separately defined and provided as services. It has an unprecedented...
IEEE1588 is a Precise Time Protocol (PTP), which is of potentially wide application in control and measurement networks. Stamping PTP messages accurately in physical layer taking advantage of hardware circuits, it is one of important key technologies to achieve the object of high precision time synchronization of IEEE1588. This paper analyzes the content of IEEE1588 standard in detail, and proposes...
IPTV video streams have the characteristics of long-lived connection, high bandwidth consumption and delay sensitive. In this paper, we propose a novel point-to-multipoint distribution mechanism for IPTV video network, and it's especially suitable for the edge network which is between access network and end users. A new transport protocol -- Labelcast, is designed and implemented. Label is used to...
Electric power grid contains three main subsystems, i.e., power generation, power transmission & distribution, and customer facilities. Recently, wireless sensor networks (WSNs) have been considered as a promising technology that can enhance all these three subsystems, making WSNs an important component of the smart grid. However, environmental noise and interference from nonlinear electric power...
Active Queue Management (AQM) and Explicit Congestion Notification (ECN) are two methods that attempt to alleviate the problems of FIFO queues and of packet drops for congestion indication respectively. Random Early Detection (RED) is the most popular AQM method. The Domain Naming System (DNS) protocol is a core Internet protocol with very high impact on user experience and overall network functionality...
This paper presents a novel energy-efficient pulse switching protocol for ultra light-weight wireless network applications. The key idea is to abstract a single pulse, as opposed to multi-bit packets, as the information exchange mechanism. Pulse switching is shown to be sufficient for event and target tracking applications with binary sensing. Target tracking with conventional packet transport can...
Network evolution towards self-aware autonomous adaptive networking aims at reducing the burden of configuring and managing networks, which leads to performance degradation. In order to optimize network operations, the introduction of self-awareness, self-management, and self-healing into the network was proposed, leading to a novel paradigm in networking - known as cognitive networking. This paper...
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