The Experts below are selected from a list of 2406 Experts worldwide ranked by ideXlab platform
Quang-hien Dang - One of the best experts on this subject based on the ideXlab platform.
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Handover Procedure and Algorithm in Vehicle to Infrastructure Visible Light Communication
IEEE Access, 2017Co-Authors: Quang-hien DangAbstract:In vehicle-to-infrastructure visible light communication (V2IVLC) systems, the vehicle receives data from LED street lights that are placed along both sides of a street. At a certain time, a vehicle communicates with only one group of LEDs. As the vehicle moves, it needs to switch the communication from the current LED group to the next group. Because of the fast movement of the vehicle and the small coverage of each LED group, the Handover between the LED groups is a difficult problem. This paper proposes an entire Handover Procedure for a V2IVLC system. The main point of this Procedure is a distancebased probabilistic algorithm for the determining of the Handover switching time. The switching time is chosen to maximize the signal quality subject to a constraint, so that the missing Handover rate is lower than a predetermined threshold. The proposed algorithm is verified through simulations. The results show that the proposed Handover algorithm can provide a high signal quality of the communication within a reasonable missing Handover rate.
Grigorios Kalivas - One of the best experts on this subject based on the ideXlab platform.
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AINA Workshops - WiMAX-WLAN Vehicle-to-Infrastructure Network Architecture during Fast Handover Process
2013 27th International Conference on Advanced Information Networking and Applications Workshops, 2013Co-Authors: Michael Charitos, Grigorios KalivasAbstract:Vehicular Network is becoming increasingly popular in recent years, Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) mobile communication mode can provide great variety of feasible applications. This paper provides the architecture design of a vehicular WiMAX-WLAN network proposed for surveillance implementations on railway environment. Mainly we focus on data transmission applications over V2I communications during fast Handover Procedure. For this reason we analyze the proposed IEEE 802.16e-802.11b/g/earchitecture for Vehicle-to-Infrastructure between two oncoming trains while moving in opposite directions with constant speeds during fast Handover Procedure. Finally, through OMNeT++simulator tool we evaluate the performance metrics of the vehicular wireless network simulation results based on Handover performance.
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WiMAX-WLAN Vehicle-to-Infrastructure Network Architecture during Fast Handover Process
2013 27th International Conference on Advanced Information Networking and Applications Workshops, 2013Co-Authors: Michael Charitos, Grigorios KalivasAbstract:Vehicular Network is becoming increasingly popular in recent years, Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) mobile communication mode can provide great variety of feasible applications. This paper provides the architecture design of a vehicular WiMAX-WLAN network proposed for surveillance implementations on railway environment. Mainly we focus on data transmission applications over V2I communications during fast Handover Procedure. For this reason we analyze the proposed IEEE 802.16e-802.11b/g/earchitecture for Vehicle-to-Infrastructure between two oncoming trains while moving in opposite directions with constant speeds during fast Handover Procedure. Finally, through OMNeT++simulator tool we evaluate the performance metrics of the vehicular wireless network simulation results based on Handover performance.
Michael Charitos - One of the best experts on this subject based on the ideXlab platform.
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AINA Workshops - WiMAX-WLAN Vehicle-to-Infrastructure Network Architecture during Fast Handover Process
2013 27th International Conference on Advanced Information Networking and Applications Workshops, 2013Co-Authors: Michael Charitos, Grigorios KalivasAbstract:Vehicular Network is becoming increasingly popular in recent years, Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) mobile communication mode can provide great variety of feasible applications. This paper provides the architecture design of a vehicular WiMAX-WLAN network proposed for surveillance implementations on railway environment. Mainly we focus on data transmission applications over V2I communications during fast Handover Procedure. For this reason we analyze the proposed IEEE 802.16e-802.11b/g/earchitecture for Vehicle-to-Infrastructure between two oncoming trains while moving in opposite directions with constant speeds during fast Handover Procedure. Finally, through OMNeT++simulator tool we evaluate the performance metrics of the vehicular wireless network simulation results based on Handover performance.
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WiMAX-WLAN Vehicle-to-Infrastructure Network Architecture during Fast Handover Process
2013 27th International Conference on Advanced Information Networking and Applications Workshops, 2013Co-Authors: Michael Charitos, Grigorios KalivasAbstract:Vehicular Network is becoming increasingly popular in recent years, Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) mobile communication mode can provide great variety of feasible applications. This paper provides the architecture design of a vehicular WiMAX-WLAN network proposed for surveillance implementations on railway environment. Mainly we focus on data transmission applications over V2I communications during fast Handover Procedure. For this reason we analyze the proposed IEEE 802.16e-802.11b/g/earchitecture for Vehicle-to-Infrastructure between two oncoming trains while moving in opposite directions with constant speeds during fast Handover Procedure. Finally, through OMNeT++simulator tool we evaluate the performance metrics of the vehicular wireless network simulation results based on Handover performance.
Robert Bestak - One of the best experts on this subject based on the ideXlab platform.
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Handover Procedure and decision strategy in lte based femtocell network
Telecommunication Systems, 2013Co-Authors: Ardian Ulvan, Robert Bestak, Melvi UlvanAbstract:Wireless systems have the capability to serve users over broad geographic area without using a costly network infrastructure. However, the main drawback of these systems represents the bandwidth restrictions and coverage. Deployment of femtocell as the emerging promising wireless access technology becomes one of possible solution how to overcome some of the drawbacks. In this paper, we investigate the Handover Procedure in femtocell network considering, both types of Handovers, horizontal and vertical. The 3GPP LTE based Handover Procedure is analysed for three scenarios: hand-in, hand-out and inter-FAP. In addition, the reactive Handover decision policy, based on the prediction of user movement and the prediction of target-FAP, is proposed as a way to eliminate frequent and unnecessary Handovers.
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WMNC - The study of Handover Procedure in LTE-based femtocell network
WMNC2010, 2010Co-Authors: Ardian Ulvan, Robert Bestak, Melvi UlvanAbstract:Wireless systems have the capability to address broad geographic area without the costly infrastructure deployment. However, the main drawback resides in the bandwidth limitation and the coverage for single access point. The deployment of Femtocell as the promising wireless access technology becomes one of the possible solution. In this paper the Handover Procedure in femtocell network is studied. The 3GPP LTE based Handover is analysed in three scenarios: hand-in, hand-out and inter-FAP. In addition, the reactive and proactive Handover strategy is also proposed as the Handover decision policy to diminish the very frequent and unnecessary Handovers.
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The study of Handover Procedure in LTE-based femtocell network
WMNC2010, 2010Co-Authors: Ardian Ulvan, Robert Bestak, Melvi UlvanAbstract:Wireless systems have the capability to address broad geographic area without the costly infrastructure deployment. However, the main drawback resides in the bandwidth limitation and the coverage for single access point. The deployment of Femtocell as the promising wireless access technology becomes one of the possible solution. In this paper the Handover Procedure in femtocell network is studied. The 3GPP LTE based Handover is analysed in three scenarios: hand-in, hand-out and inter-FAP. In addition, the reactive and proactive Handover strategy is also proposed as the Handover decision policy to diminish the very frequent and unnecessary Handovers.
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WMNC/PWC - The Efficiency Performance on Handover's Scanning Process of IEEE802.16m
Wireless and Mobile Networking, 2009Co-Authors: Ardian Ulvan, Robert BestakAbstract:This paper investigates the efficiency of scanning process on Handover Procedure in IEEE802.16m. The performance evaluation is based on current running standard of 802.16e since .16m is still under development. The evaluation is done at both parts of Handover Procedure, i.e. network topology acquisition and Handover process. An efficient scanning process is proposed to reduce the scanning time and obtained a minimal Handover interruption time.
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The Analysis of Scanning Time in IEEE802.16m's Handover Procedure
2009 16th International Conference on Systems Signals and Image Processing, 2009Co-Authors: Ardian Ulvan, Robert BestakAbstract:In this paper we analyze the efficiency of scanning process on Handover Procedure in IEEE802.16 m. Since the .16 m is still under development, the performance evaluation is based on current running standard of 802.16 e. We consider four scan types and evaluate the average scanning time required. In addition, four different Handover strategies are utilized to analyze the Handover interruption time. The evaluation is done at both parts of Handover Procedure i.e. network topology acquisition and Handover process. The efficient scanning process is proposed to reduce the scanning time and obtained a minimal Handover interruption time.
Roberto Corvaja - One of the best experts on this subject based on the ideXlab platform.
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QoS analysis in overlay bluetooth-WiFi networks with profile-based vertical Handover
IEEE Transactions on Mobile Computing, 2006Co-Authors: Roberto CorvajaAbstract:The performance of an overlay Bluetooth and IEEE 802.11b (WiFi) network is considered in terms of quality of service parameters such as the packet latency, the packet error rate, and the throughput, in the presence of a vertical Handover Procedure, taking into account the mutual Bluetooth-WiFi interference and showing the influence of the main system parameters. The objective is to maximize the user QoS allowing the mobile to switch from a network to the other, with the so-called vertical Handover. The basic idea is to activate the vertical Handover, not on the basis of the received power level, but by the crossing of thresholds defined by the user profile, which comprises objective values for parameters such as the packet error rate and the packet delay. The results show that the use of the vertical Handover Procedure can lead to an improvement in the QoS parameters
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experimental performance of the Handover Procedure in a wifi network
2004Co-Authors: Roberto Corvaja, Andrea Zanella, Michele Dossi, Adolfo Tontoli, Paolo ZennaroAbstract:An experimental evaluation of the Handover performance in a 802.11b (WiFi) network has been obtained in terms of available bandwidth and Handover latency. The network consists of two access points connected to a wired LAN and a measurement setup composed by laptop PCs, equipped with WiFi cards, on which a sniffer is used to capture all the packets transmitted on the radio link. Applications considered are streaming and ftp-like applications. The analysis of the Handover delay is performed, showing the dependence on the network configuration parameters and results, both at the MAC and UDP/TCP layer are presented, to show how applications can suffer the Handover latencies. It will be shown that these latencies can vary significantly for the same configuration of mobile stations and APs and that the primary source of delay is the scan Procedure used to discover the new access point. Keywords— Wi-Fi, 802.11b, Handover.
