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With the advent of multiple radio interfaces on modern smart phones, simultaneous transmission and reception of data through via both mobile networks and WiFi networks has gained a considerable attention as a cost-effective means for mobile data offloading. In this paper, we present a practical SDN-based data offloading framework based on a Femto-WiFi Integrated network. The proposed framework take...
In response to increase of mobile data traffic, telecom operators usually employ “enforced handover” policy to direct data traffic to WiFi AP (Access Point). Once their user clients enter into WiFi AP coverage, they will be handed over to WiFi AP from BS in order to offload mobile data traffic. However, if there are too many BS user clients enter into WiFi AP coverage, it may lead to excessive handover...
High-performance computing (HPC) is recognized as one of the pillars for further progress in science, industry, medicine, and education. Current HPC systems are being developed to overcome emerging architectural challenges in order to reach Exascale level of performance, projected for the year 2020. The much larger embedded and mobile market allows for rapid development of intellectual property (IP)...
Wireless sensor networks offer a pragmatic solution for monitoring in a variety of scenarios. For efficient and practical data gathering, especially in large-scale systems deployed in inaccessible areas, unmanned vehicles are becoming a compelling solution. The added infrastructure flexibility comes at the cost of limited contact time between the mobile entity and the stationary devices. The channel...
To preserve consistent throughput, smartphones are equipped with a network switch feature (handover in heterogeneous networks). Frequent switching is often blamed to be a QoE downgrader in populated areas. In this paper, we measured auto switch occurrences between Wi-Fi and mobile data networks. We deployed an Android monitoring application for 89 participants and collected network status information...
In spite of their rapid growth, cloud applications still heavily rely on the network communication infrastructure, whose stability and latency directly affect the quality of experience. In fact, as mobile devices need to rapidly get real-time information and files from the cloud, it becomes an extremely important factor for cloud providers to deliver a better user experience. In this paper, we specify...
A new source-side monitored capacitive power transfer system (CPTS) for contactless mobile charger using Class-E converter is proposed. Contrary to conventional contactless mobile charger, an exact battery voltage monitoring is achieved without additional cumbersome communication circuits. The proposed CPTS operates in two iterative modes; a main-charging-mode and a sub-battery-monitoring-mode. Not...
In developing countries, people's living pressure is increasing with the society's development by inefficient economic growth mode. Recently, the number of people who suffer from sudden cardiac death is progressively increasing, and cardiovascular disease (CVD) has become one great killer which threats the life and health of people. However, at present, we are confronted with one problem: when a patient...
In the field of wireless health monitoring for specially old age people cognitive wireless sensors which can monitor the daily activities have been reported to be of great importance. Usually a large number of sensors like motion sensor, current sensor, force sensor and flow sensors are widely employed. However there are redundancies in the system and it is required to reduce the number of sensor...
In a cloud computing environment, users prefer to migrate their locally processing workloads onto the cloud where more resources with better performance can be expected. ProtoGENI [1] and PlanetLab [17] have further improved the current Internet-based resource outsourcing by allowing end users to construct a virtual network system through virtualization and programmable networking technologies. However,...
A data stream generated from hysteresis-based multi-scroll chaos is proposed in this paper. The mathematical model of the multi-scroll chaotic attractor is a continuous-time linear third-order system with a feedback of hysteresis-series. The pseudo random data stream is generated from the state values of the third-order systems at the instance of hysteresis switching. Thanks to the complicated dynamical...
Aiming for monitoring the existed mobile services, we are here to propose an automatic dial testing system for mobile services. Firstly we sketch out the dial testing method, and then propose the whole framework of the mobile dial testing system, comparing with the traditional way. After that, we elaborate the whole process of a dial testing in every detail. Finally, we comprehensively test the voice...
Teleoperation is an important strategy for controlling outdoor mobile robots. It determines the reliability and the fields of the mobile robots. This paper introduced a type of teleoperation system for multiple mobile robots. Improved image radio system ensured the image transmission channels of coherent image clarity. Improved new data transmission system ensured that the data transmission is stable...
The scour is one of the major causes for bridge failure. Scour failure occurs suddenly without prior warning or sign of distress to the bridge. However, there are many challenges to monitor the processes of hydraulic scour, such as measuring equipments are essentially critical, especially during the floods. This paper presents an in-situ scour monitoring system by using the novel mobile wireless technology...
The existing data sampling schemes can not update ROM serial numbers of DS18B20 automatically and locate DS18B20s accurately. For these reasons above, it is difficult to replace the faulty DS18B20s immediately. To solve this problem, both I/O (Input/Output) ports number of MCU (Micro Controller Unit) and the value of temperature alarm trigger registers (TH and TL) are used to determine the storage...
In the application of hard handoff technology, communication interrupt rate greatly increases when the mobile station discontinues communication with the old base station prior to the connection with the new one. Based on the received signal strength criterion, a simulation model of the soft handoff of the CDMA system is established to simulate the soft handoff between two cells. According to the...
Reduction of operational efforts and complexity are key drivers for RAN Long Term Evolution. It is also of interest to minimise operational effort by introducing self-configuring and self-optimising mechanisms. A self-optimising function shall increase network performance and quality reacting to dynamic processes in the network. To improve the efficiency and performance of the E-UTRAN system, an efficiency...
Nowadays, technologies are providing the mobile terminals with much more powerful computational abilities. Such improvement made it possible to run many complex applications on mobile devices. However, many of these new applications are also resources demanding. Lacking sufficient resources would cause performance failures and impact negatively on the users' quality of experience. In order to improve...
The multiple backhaul mobile access router (MAR) can provide high capacity and high performance Internet access for emerging mobile wireless applications. In this paper we improve the MAR with the capability to stripe traffic from clients over multiple available network devices. The MAR allows different backhauls to be used simultaneously and accommodates diverse policies. We present experimental...
Although the landscape of mobile devices is continuously evolving towards more powerful terminals, the limitations regarding processing power, memory capacity and speed, network connection and battery, are still present and at certain loads fail to satisfy the requirements of complex applications. Being always connected to the network offers a solution to this problem as the server infrastructure...
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