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Performance Test of 4G (LTE) networks in Saudi Arabia

Performance Test of 4G (LTE) Networks in Saudi Arabia

引用

International Conference on Technological Advances in Electrical, Electronics and computer Engineering

作者： Mahdi H. A. Ahmed Computer Networks and Communications Engineering Dept. Faculty of Computer Science King Khalid University Abha Saudi Arabia

ISBN: (纸本)9781467356121

The revolution of telecommunication mobile technology and the growing market of services and applications in the Internet have put more pressure on MNOs (Mobile Network Operators) in order to offer wireless and mobile broadband services. In SA (Saudi Arabia) there are 3 MNOs who have started in 2011 offering 4G services. In this paper we will give some description to 4G networks and make brief comparison of the performance of the three competing networks here in SA.

关键词： 4G LTE WiMax Performance Test Mobily STC Zain latency upload download jitter.

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Advanced high-adaptive image coding for frame memory reduction in LCD overdrive

Advanced high-adaptive image coding for frame memory reducti...

引用

2012 9th IEEE RIVF International Conference on Computing and Communication Technologies, Research, Innovation, and Vision for the Future, RIVF 2012

作者： Huu, Tai Nguyen Thi, Hoang-Lan Nguyen Dept. of Information Technology Hue Univ. Hanoi Univ. of Science and Technology Hue Viet Nam Dept. of Data Communications and Computer Networks Hanoi Univ. of Science and Technology Hanoi Viet Nam

ISBN: (纸本)9781467303088

In this paper, Advanced High-Adaptive Image Coding (AHAIC) is proposed to increase compression performance for Frame Memory Reduction in LCD Overdrive. The AHAIC contains a new technique to improve the quality of decompressed images. It is a Content-based Bit Distribution Technique (CBBDT) which improves the image quality while preserving fixed word length compression feature. Experimental results show that, compared with other coding methods used in the same type of application, AHAIC has outperforming feature. ©2012 IEEE.

关键词： Image coding

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Box-particle PHD filter for multi-target tracking

Box-particle PHD filter for multi-target tracking

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15th International Conference on Information Fusion, FUSION 2012

作者： Schikora, Marek Gning, Amadou Mihaylova, Lyudmila Cremers, Daniel Koch, Wolfgang Dept. Sensor Data and Information Fusion Fraunhofer FKIE Wachtberg Germany Dept. of Computer Science University College London United Kingdom School of Computing and Communications University of Lancaster United Kingdom Dept. Computer Science Technical University of Munich Germany

ISBN: (纸本)9780982443859

This paper develops a novel approach for multitarget tracking, called box-particle probability hypothesis density filter (box-PHD filter). The approach is able to track multiple targets and estimates the unknown number of targets. Furthermore, it is capable to deal with three sources of uncertainty: stochastic, set-theoretic and data association uncertainty. The box-PHD filter reduces the number of particles significantly, which improves the runtime considerably. The small particle number makes this approach attractive for distributed computing. A box-particle is a random sample that occupies a small and controllable rectangular region of non-zero volume. Manipulation of boxes utilizes methods from the field of interval analysis. The theoretical derivation of the box-PHD filter is presented followed by a comparative analysis with a standard sequential Monte Carlo (SMC) version of the PHD filter. To measure the performance objectively three measures are used: inclusion, volume and the optimum subpattern assignment metric. Our studies suggest that the box-PHD filter reaches similar accuracy results, like a SMC-PHD filter but with much considerably less computational costs. Furthermore, we can show that in the presence of strongly biased measurement the box-PHD filter even outperforms the classical SMC-PHD filter. © 2012 ISIF (Intl Society of Information Fusi).

关键词： Distributed computer systems

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DynFire: Dynamic firewalling in heterogeneous environments

DynFire: Dynamic firewalling in heterogeneous environments

引用

World Congress on Internet Security, WorldCIS-2012

作者： Vensmer, Alexander Kiesel, Sebastian University of Stuttgart Institute of Communication Networks and Computer Engineering Pfaffenwaldring 47 70569 Stuttgart Germany University of Stuttgart Computing Center Networks and Communications Systems Dept. Allmandring 30A 70569 Stuttgart Germany

ISBN: (纸本)9781908320049

This paper presents "DynFire," a novel approach for the role-based, dynamic control of network firewalls. DynFire allows an individually controlled, secure access to the ITresources of a large organization, with particular focus on mobile users and users with restricted rights, such as subcontractors. The basic assumption behind DynFire is that, within a secured network domain separated from the Internet, we can establish a temporary binding between an IP address and a single user ID. Whenever a user connects to or disconnects from this secure network domain, firewalls are configured accordingly, using a centralized "Firewall Manager" and standardized signaling protocols. © 2012 Infonomics Society.

关键词： Network security

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DynFire: Dynamic firewalling in heterogeneous environments

DynFire: Dynamic firewalling in heterogeneous environments

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World Congress on Internet Security (WorldCIS)

作者： Alexander Vensmer Sebastian Kiesel University of Stuttgart Institute of Communication Networks and Computer Engineering Stuttgart University of Stuttgart Computing Center Networks & Communications Systems Dept. Stuttgart

This paper presents “DynFire,” a novel approach for the role-based, dynamic control of network firewalls. DynFire allows an individually controlled, secure access to the ITresources of a large organization, with particular focus on mobile users and users with restricted rights, such as subcontractors. The basic assumption behind DynFire is that, within a secured network domain separated from the Internet, we can establish a temporary binding between an IP address and a single user ID. Whenever a user connects to or disconnects from this secure network domain, firewalls are configured accordingly, using a centralized “Firewall Manager” and standardized signaling protocols.

关键词： Fires Security Protocols Internet IP networks Network topology Topology

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Box-particle intensity filter

Box-particle intensity filter

引用

9th IET data Fusion and Target Tracking Conference: Algorithms and Applications, DF and TT 2012

作者： Schikora, M. Gning, A. Mihaylova, L. Cremers, D. Koch, W. Streit, R. Fraunhofer FKIE Dept. Sensor Data and Information Fusion Wachtberg Germany University of Lancaster School of Computing and Communications United Kingdom University College London Department of Computer Science United Kingdom Technical University of Munich Department of Computer Science Germany Metron Inc. Reston VA United States

ISBN: (纸本)9781849196246

This paper develops a novel approach for multi-target tracking, called box-particle intensity filter (box-iFilter). The approach is able to cope with unknown clutter, false alarms and estimates the unknown number of targets. Furthermore, it is capable of dealing with three sources of uncertainty: stochastic, set-theoretic and data association uncertainty. The box-iFilter reduces the number of particles significantly, which improves the runtime considerably. The low particle number enables this approach to be used for distributed computing. A box-particle is a random sample that occupies a small and controllable rectangular region of non-zero volume. Manipulation of boxes utilizes the methods from the field of interval analysis. Our studies suggest that the box-iFilter reaches an accuracy similar to a sequential Monte Carlo (SMC) iFilter but with much less computational costs.

关键词： Distributed computer systems

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Analysis of Deficit Round Robin Scheduling for Future Aeronautical data Link

Analysis of Deficit Round Robin Scheduling for Future Aerona...

引用

IEEE International Symposium on Personal, Indoor and Mobile Radio communications

作者： Serkan Ayaz Felix Hoffmann Reinhard German Falko Dressler German Aerospace Center (DLR) Institute of Communications and Navigation Computer Networks and Communication Systems Dept. of Computer Science University of Erlangen Institute of Computer Science University of Innsbruck

ISBN: (纸本)9781457713460

The aviation community is currently working on the standardization of data communication systems for the future air traffic management. In this context, the International Civil Aviation Organization (ICAO) has initiated a work on standardization of an IPv6-based aeronautical telecommunications network and on future radio access technologies, respectively. In this paper, we integrate L-Band Digital Aeronautical communications System Option 1 (L-DACS 1), which is one candidate for future radio access technologies, with realistic IPv6-based network layer functionality and analyze Deficit Round Robin (DRR) with fragmentation algorithm for the forward and return link in L-DACS 1. Our analysis mainly covers two application domains: file transfer and real-time services. We show that DRR with fragmentation scheduler provides good performance results in terms of throughput, delay, and bandwidth fairness.

关键词： Air traffic management International Civil Aviation Organisation Round robin Telecommunication networks data TRANSMISSION SYSTEMS Standardization Access to technology Analysis

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Greedy geographic routing with path optimization in wireless sensor networks

Greedy geographic routing with path optimization in wireless...

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2010 8th IEEE-RIVF International Conference on Computing and Communication Technologies: Research, Innovation and Vision for the Future, RIVF 2010

作者： Le Dinh, Thanh Nguyen, Dai Tho Dept. of Networks and Computer Communications University of Engineering and Technology VNU-HN Hanoi Viet Nam

ISBN: (纸本)9781424480753

In this paper, we propose Greedy with Path Optimization Routing (GPOR), a novel geographic routing protocol for wireless sensor networks. GPOR finds initial routing paths by following a greedy with recovery strategy, then uses a follow-up technique to optimize the paths. An attempt is also made to create routing entries applicable to destination areas rather than individual nodes. Main advantages of GPOR are path optimization and void avoidance capacities. We implement GPOR in ns-2 and present simulation results. ©2010 IEEE.

关键词： Wireless sensor networks

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Header compression for resource and energy efficient IP over tactical data link

Header compression for resource and energy efficient IP over...

引用

2nd International Mega-Conference on Future Generation Information Technology, FGIT 2010

作者： Yoon, Yongkoo Park, Suwon Lee, Hyungkeun Kim, Jong Sung Jee, Seung Bae Dept. of Electronics and Communications Engineering Kwangwoon University Seoul Korea Republic of Dept. of Computer Engineering Kwangwoon University Seoul Korea Republic of Tactical Data Link PMO Agency for Defense Development Seoul Korea Republic of

ISBN: (纸本)3642175686

Link-16 is a tactical data link for providing information including tactical data link message necessary to a command and control unit. Even though current Link-16 transmits and receives only tactical data link message, there is a desire to send many kinds of IP applications over Link-16. However, too large size of IP header decreases the transmission efficiency of IP applications over Link-16. Thus, IP header compression algorithm suitable to Link-16 is needed without loss of performance. Conventional header compression algorithms such as RFC 2507, RFC 2508 and RFC 3095 are not suitable to Link-16 because it broadcasts information with low transmission data rate. In this paper, we propose a novel IP header compression algorithm for transmitting tactical data link messages and IP application data without modification of Link-16. © 2010 Springer-Verlag Berlin Heidelberg.

关键词： Energy efficiency

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Heavy weight codes

Heavy weight codes

引用

IEEE International Symposium on Information Theory

作者： Gérard Cohen Patrick Solé Aslan Tchamkerten Communications and Electronics dept. Telecom ParisTech (Networks and Computer Science dept. Paris France Communications and Electronics Department Paris France

Motivated by certain recent problems in asynchronous communication, we introduce and study B(n, d, w), defined as the maximum number of length n binary sequences with minimum distance d, and such that each sequence has weight at least w. Specifically, we investigate the asymptotic exponential growth rate of B(n, d, w) with respect to n and with fixed ratios δ = d/n and ω = w/n. For ω ∈ [0, 1/2], this growth rate function b(δ, ω) is shown to be equal to a(δ), the asymptotic exponential growth rate of A(n, d)-the maximum number of length n binary sequences with minimum distance d. For ω ∈ (1/2, 1), we show that b(δ, ω) ≤ a(δ, ω) + f(ω), where a(δ, ω) denotes the asymptotic exponential growth rate of A(n, d, w), the maximum number of length n binary sequences with minimum distance d and constant weight w, and where f(w) is a certain function that satisfies 0 ω→1 f(ω) = lim ω→1/2 f(ω) = 0. Based on numerical evidence, we conjecture that b(δ, ω) is actually equal to a(δ, ω) for ω ∈ (1/2, 1). Finally, lower bounds on B(n, d, w) are obtained via explicit code constructions.

关键词： Binary sequences Transmitters Asynchronous communication Decoding Testing Information resources Error probability Telecommunications computer science

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