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An analysis of the video capabilities of multiple antenna LTE networks

Abstract

LTE technology has been designed to serve high data traffic and to withstand occasional traffic bursts caused by various events that arise when live video streams are watched. LTE will have to manage its resources judiciously since video traffic is not constant, and at the same time it will have to seek to offer highest quality experience. This paper demonstrates the benefits of using MIMO technique with 4 transmitters instead 2 when requesting live video streams. It also displays mobility cases each with a different subscriber moving speed, and with different gains, respectively.

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Performance Analysis of Sparse Data Structure Implementations

Abstract

Sparse linear algebraic data structures are widely used during the solution of large scale linear optimization problems. The efficiency of the solver is significantly influenced by the used data structures. The implementations of such data structures are not trivial. A performance analysis of the available data structures can provide valuable information to improve efficiency. In the talk we present our software that supports this task as well as our new, special vector representation. We also report results covering the solution for numerical issues affecting the performance of sparse linear algebraic operations.

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Vertical Handover Decision Algorithm for Heterogeneous Cellular-WLAN Networks

Abstract

Multi-access and heterogeneous wireless communications are considered to be one of the solutions for providing generalized mobility, high system efficiency and improved user experience, which are important characteristics of the Next Generation Networks. This paper proposes a Vertical Handover (VHO) decision algorithm for heterogeneous network architectures which integrate both cellular networks and Wireless Local Area Networks (WLANs). The cellular-WLAN and WLAN-WLAN VHO decisions are taken based on parameters which characterize both the coverage and the traffic load of the WLANs. Computer simulations performed in complex scenarios show that the proposed algorithm ensures better performance compared to “classical” VHO decision algorithms.

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Theoretical study of the Nonlinear Quadratic Optimal Control implementation

Abstract

In this brief, I study the finite and infinite nonlinear discrete time optimal control. The quadratic control problem for nonlinear case can be solved with different methods such as: linearization of the system model around each operation point or some different methods, where should be used an on-line parameter identification algorithm. In this paper, I study some properties of these algorithms in order to improve the control efficiency of the nonlinear process control. In this paper, I supposed the all states are accessible, so there is not necessary any state estimation algorithm for the implementation of the proposed optimal control (LQR - Linear Quadratic Regulators) methods.

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Dynamic Models of a Home Refrigerator

Abstract

Home refrigerators produce a substantial part of the annual power consumption in an average household. To further improve the efficiency of these devices, new intelligent control solutions are required. These solutions necessitate the behaviour modeling of the refrigerators.

We seek models with as simple structure as possible, since future intelligent controllers may use such models in real time, thus their evaluation must be feasible even on simple microcontrollers. We investigate various dynamic models to describe the behavior of the refrigerator, i.e. the cool-down and warm-up phases.

For model parameter identification real data was collected from a real home refrigerator. Data processing, modeling and the parameter identification were performed in MATLAB environment.

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Communication Protocol for Wireless Sensor Network, Dedicated for Real Time Biosignal Acquisition, Implemented on Top of Contiki OS

References [1] Eid, D., Yousef, A. and Elrashidi, A., “ECG Signal Transmissions Performance over Wearable Wireless Sensor Networks”. Procedia Computer Science , 65 , pp.412-421., 2015 [2] Manjeshwar, A. and Agrawal, D.P. “TEEN: a routing protocol for enhanced efficiency in wireless sensor networks.” IEEE, p. 30189a. 2001. [3] Farooq, M. O. and Kunz, T., “Operating Systems for Wireless Sensor Networks: A Survey”, Sensors , vol. 11 : 5900-5930, 2011. [4] Mallikarjuna, A., Avu, R.V., Kumar, P., Janakiram, D., Kumar, G. A., “Operating

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Managing Streaming Services in a Distributed Testbed

, IEEE 47.8 (2009): pp. 92-99. [5] Manjeshwar, A.; Agrawal, D.P. TEEN: A Routing Protocol for Enhanced Efficiency in Wireless Sensor Networks. In Proc. of the 15th Int’l Parallel and Distributed Processing Symposium IPDPS 2001, San Francisco, CA, USA, April 2001; pp. 2009-2015 [6] EU Comission, Information Society and Media, “Internet of Things in 2020 - A Rroadmap for the future“, EPoSS_Workshop, September 2008 [7] Karagiannis, Thomas, et al. "Is p2p dying or just hiding?[p2p traffic measurement]." . GLOBECOM - IEEE

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Joint Dimensioning of Outdoor Heterogeneous Radio Access Networks (HetNet) using Monte Carlo Simulation

. Bouras, V. Kokkinos, A. Papazois és G. Tsichritzis, “Spectral Efficiency Performance of MBSFN-enabled LTE Networks” IEEE WiMob, 2010. [8] I Törös, Péter Fazekas, “An energy efficient cellular mobile network planning algorithm”, IEEE VTC Spring, 2011 [9] Y. Okumura et al., “Field strength and its variability in VHF and UHF land-mobile service” Rev. Elec. Comm. Lab., pp. 825-873., 1968. [10] M. Hata, “Empirical formula for propagation loss in land mobile radio services” IEEE Trans. Veh. Tech., pp. 317-325, 1980

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