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Software Defined Networking (SDN) is the key technology for combining networking and Cloud solutions to provide novel applications. SDN offers a number of advantages as the existing resources can be virtualized and orchestrated to provide new services to the end users. Such a technology should be accompanied by powerful mechanisms that ensure the end-to-end quality of service at high levels, thus,...
Securing Internet of Things (IoT) systems is a challenge because of its multiple points of vulnerability. A spate of recent hacks and security breaches has unveiled glaring vulnerabilities in the IoT. Due to the computational and memory requirement constraints associated with anomaly detection algorithms in core networks, commercial in-line (part of the direct line of communication) Anomaly Detection...
With the fast proliferation of residential microgrids integrated into the power grid, it is crucial to develop a low cost and high efficiency microgrid central control (MGCC) for promoting the large-scale application of residential microgrids. Considering various users' demand, we develop a novel MGCC based on the multi-level communication model. The MGCC integrates many functional modules, including...
The recently emerging paradigm of software defined networking (SDN) predominantly employs the control-data plane OpenFlow protocol, offering centralized real-time programmability and monitoring of network devices. Effective SDN based traffic engineering using OpenFlow, particularly in campus networking however, requires sophisticated real-time user traffic visualization solution having minimum management...
The traditional auto-reclosing method in relaying cannot meet the requirements of the distribution network with small hydropower in case of faults. In order to provide reliable guarantee for safe operation of transmission line, on the basis of the improvement measures by the reclosing device in the practical engineering, a reclosing device adapted to synchronization line of small hydropower station...
A continuous real-time data acquisition and communication equipment based on Advanced RISC Machine and Field Programmable Gate Array is designed and developed, on the basis of which an on-line monitoring and fault diagnosis system for high voltage circuit breaker is realized. Mechanical, electrical and environmental parameters of the switching process can be gathered by this system. The function modules...
Software defined networking (SDN) provides a centralized control framework with real-time control of network components, residential customer routers in particular, that allows automated per-user bandwidth allocation. However, employing dynamic traffic shaping for efficient bandwidth utilization among residential users is a challenging task. In this context, understanding application usage requirements...
Real time detection of flow anomalies is a critical part of wide range of management and security applications in many Cloud and NFV systems. Solutions based on per-flow records have become impossible due to the increasing traffic volumes and the limited available resources such as TCAM entries and fast counters. In this paper we study a novel dynamic control mechanism that allows detecting flow anomalies...
Early analysis of timing is essential in the design of reliable avionics systems. We consider an environmental monitoring system that allows the surroundings of an aircraft to be observed continuously in real time. We analyze timing aspects of the partitions within the sensor and monitoring nodes, and of the intermediate switches that connect them. We use the application-specific I/O integration support...
A multi-channel spectrum on-line auto-monitor method for satellite communications signal is designed, which is different from the traditional single-channel method based on the spectrum analyzer. To realize the novel method, a suitable signal monitoring point is selected firstly, a system architecture of "monitoring point & directional coupler & integrated matrix network & spectrum...
This paper presents the significance of analysis of performance and memory non functional requirement in real time embedded systems development when the development methodology is agile with incremental development. Efficient ways of tracking these parameters during the development cycle also described.
A combination of several activities is required to solve a development task, but in the end, developer reports only part of it. It is difficult to understand whether all committed files were changed because of the reason in a given description. Software developers work on multiple tasks at once and often fail to distinguish them with separate commits because of their unknowingness, as well as of limitations...
Transmission topology control (line switching) is currently practiced with manual and ad-hoc based actions by ISO control room personnel who rely on a combination of past experience and a fixed data set of line openings linked to various congestion patterns. Our previous work used sensitivity information from the solution of a DC economic dispatch problem to develop topology control algorithms that...
For the problem of real-time monitoring and condition decision of high-voltage substation switches, a real-time monitoring algorithm is proposed for the substation folded switch based on geometric analysis of monitoring images. Firstly, capture images containing the folded switch using the properly installed camera, and transfer them to the data processing terminal. Then, search for straight line...
Caregiving a person suffering from dementia or loss of brain cognitive ability due to aging is a big physical, mental and emotional burden to family members. In this paper we present a novel system for assisting caregivers at home. The system employs heterogeneous sensing and artificial intelligence technologies to automatically and unobtrusively monitor the patient; assess possible risks that the...
This paper introduces a novel QoS architecture for process automation. The proposed architecture leverages the concept of Software Defined Network. The architecture maintains the real-time communications based on the measured propagation time. It maintains the configurations by detecting and predicting the change of propagation time in addition to queue usage. The authors utilize the OpenFlow with...
This paper provides insights into the traffic flow monitoring system of OF@TEIN (OpenFlow@Trans Eurasia Information Network) testbed. OF@TEIN is software defined networking (SDN) testbed adapted by KOREN (KOrea advanced REsearch Network) and integrated with the research and education networks of several Asian nations including Japan, Malaysia, Thailand, Vietnam, Philippine, etc. Traditional traffic...
Virtualization has been used as the de facto technology to allow multiple operating systems (virtual machines) to run on top of the same hardware platform. In the embedded systems domain, virtualization research has focused on the coexistence of real-time requirements with non-real-time characteristics. However, existent standard software-based virtualization solutions have been shown to negatively...
This paper analyzes the factors affecting the response time of I/O in VCPU with CPU-intensive workload based on Credit scheduler, and presents a new dynamic time slice mechanism in Credit Scheduler of Xen VMM. This scheduler can improve the I/O response time of VCPU having intensive I/O and CPU workloads. Especially when the workload of PCPU becomes heavy, the proposed new mechanism can stabilize...
This paper discusses a low-cost, short period, small and ingenious supervising system for power equipment and environment by Telecommunication Office of township level in Yunnan Province. And it expounds the constitution, function and feasible program of the system.
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