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An interference monitoring station is presented which detects, characterises and logs interference events. The system operates autonomously and continuously over multiple global navigation satellite system (GNSS) bands. With a bandwidth of up to 80 MHz, input resolution of 8 bit an overall data rate of approximately 1.3 Gbit/s can be supported. The interference detection is carried out in real-time,...
The next industrial revolution, generally referred to as Industry 4.0, is already here. This envisions a rapid transformation in the design, operation and service of manufacturing systems, where machines, sensors and actuators are interconnected in the factories in order to enable spontaneous collaboration, monitoring and control. Currently, Cyber-Physical-Systems (CPS) use regular Internet protocols...
A flow monitoring scheme allows an SDN controller to periodically collect the statistics (e.g., data rates) of all flows in the network. The rate of a flow passing through multiple switches can be collected from any switch along the path. But if a flow only passes through a single switch, i.e., a lonely flow, its flow rate must be collected from that particular switch. While polling a switch for flow...
In recent years, as the rapid development of the economy, the number of warehousing enterprises continued to boost. As an important tool in the warehouse, the operations of forklift trucks are ascending greatly due to their flexibility and portable abilities. The great number of running track of forklift trucks ring potentially dangers to the safety management of warehouse. The GPS signals have been...
Current prospects of Internet of Things (IoT) is very strong for healthcare sector. It is also very popular due to its ability for sensing and measurements. In the low energy form, we have narrowband IoT (NBIoT). It is preferred in healthcare sector due to its low energy requirements. There are several proposals for the implementation of NBIoT in the healthcare sector. NBIoT has been standardized...
We propose an architecture that incorporates a robust and agile primary user (PU) detection, accompanied by a dynamic OFDM spectrum allocation scheme. By exploiting the capabilities of a 2×2 MIMO PCIe SDR device we are able to maximize the usage of the available spectrum with the minimal PU disturbance.
E-Healthcare system plays a major role in the society. It monitors the health condition and helps in giving appropriate medical treatments. This system aims at gathering and storing patient's details and sharing health related information. It also has high legitimate concerns about patient's privacy and information security. This system minimizes the infrastructural barriers for the developing nations...
As we move to higher data rates, the performance of clock and data recovery (CDR) circuits becomes increasingly important in maintaining low bit error rates (BER) in wireline links. Digital CDRs are popular in part for their robustness, but their use of bang-bang phase detectors (BB-PD) makes their performance sensitive to changes in jitter caused by PVT variations, crosstalk or power supply noise...
There is a spectrum of solutions are available for distributing content over the Internet today. One of these solutions is Content distribution networks (CDN). CDN need to make decisions, such as server selection and routing, to improve a performance of content distribution. But we must remember, that performance may be limited by various factors such as packet loss in the network, a small receive...
In Data center network, with the rapid development of network applications, how to balance the network load has become the focus of everyone's attention. It is required to fully utilize the resources such as bandwidth to provide high bandwidth for various cloud computing service. In this paper, we propose a dynamic load balancing routing mechanism based on disturbance under SDN. The proposed scheme...
Based on the analysis of the data characteristics of typical business in distribution network, the data transmitted in the distribution communication network are classified. After studied the network scheduling algorithm based on the concept of "window", an improved dynamically time window sharing scheduling algorithm is proposed for distribution communication network. According to the differences...
In the network environment with limited network resources, the overall bandwidth is usually competitively shared among various application users. The traffic engineering techniques presented for resolving the bandwidth sharing, e.g. limited traffic rate and traffic blocking, may not be able to satisfy the requirement for all types of services. In this paper, we propose an effective routing mechanism...
This paper evaluates the impacts of pulse shapes and modulation format on energy and power consumption for wireless body area networks (WBANs) based on ultra wideband (UWB). Microelectronic devices (e.g., sensors, transceivers, etc.) are components of this network, used to monitor biological signal activities in vicinity, over the body or by implants. An impulse radio (IR) is addressed for this purpose...
The tsunami of video services brings huge pressure on communication systems, especially on some bandwidth-limited scenarios like wireless networks. Represented by H.264, current video compression approaches can save the transmission bandwidth by reducing the intra- and inter-frame redundancy. However, the huge amount of video content redundancy (VCR) in the transmission is still existing. In this...
A Smart Grid system involves many applications, such as power grid state monitoring and control, demand response, distribution automation, distributed generation and microgrids. They will generate a large volume of data traffic over the grid with different quality of service (QoS) requirements, which present challenges to the existing network architecture and protocols. In this paper, we propose to...
Aiming at improving the energy efficiency of 3D-stacked memory subsystems, this paper proposes a power-aware last level cache (LLC) control mechanism. The proposed mechanism switches enabling/disabling the LLC according to application characteristics and the power efficiency of the memory subsystems. Evaluation results show that the proposed mechanism improves the power efficiency of 3D-stacked memory...
Provisioning of high I/O capabilities for high-end HPC architectures is generally considered a challenge. A good understanding of the characteristics of the utilisation of modern I/O systems can help address the increasing performance gap between I/O and computation. In this paper we present results from an analysis of server-side performance counters that had been collected for multiple years on...
HTTP Adaptive Streaming (HAS) has become increasingly more popular. However, the research about HTTP adaptive streaming for multi-server environments is limited. Compared with traditional single-server environments, HAS for multi-server environments is able to offer expanded bandwidth, link diversity, and reliability. However, it is a challenging issue to support the seamless playback in multi-server...
Cloud computing has transformed the accessibility and usage of information technology resources, by offering them as services via the Internet. Cloud service provisioning spans across infrastructure, platform and software levels. The management of the services at these levels is based on monitoring. The analysis of monitoring data provides insight into Cloud operations in order to make informed decisions...
Video conferences over the Internet with multiple participants have to be wirelessly connected to improve the communication efficiency. However, video conferences are often held in places suffering from crowded wireless medium, such as offices and schools. This leads to many challenges on providing high video conferencing experience. In this paper, we study the problem of video streaming over crowded...
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