The Experts below are selected from a list of 16743 Experts worldwide ranked by ideXlab platform
Hazem H Refai - One of the best experts on this subject based on the ideXlab platform.
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VTC Fall - Unsaturated Performance of IEEE 802.11 Broadcast Service in Vehicle-to-Vehicle Networks
2007 IEEE 66th Vehicular Technology Conference, 2007Co-Authors: Xianbo Chen, Hazem H RefaiAbstract:In this paper, we propose an analytic model for performance evaluation of IEEE 802.11 ad hoc Broadcast networks without the assumption of saturation condition that is not true in safety related vehicle-to-vehicle (v2v) communication. We use a discrete time M/G/l queue to model occasional occurrences of safety related message in each vehicle. By means of probability generating function (PGF) and a recursive algorithm, we obtain solution to the analytic model. Based on the solution, we derive several important performance indices for IEEE 802.11 Broadcast Service, such as packet delay, throughput, packet delivery ratio, and Service time distribution. The proposed analytic model is validated by extensive simulations. Numerical results also reveal characteristics of the Broadcast Service in a typical v2v wireless network.
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Unsaturated performance of IEEE 802.11 Broadcast Service in vehicle-to-vehicle networks
IEEE Vehicular Technology Conference, 2007Co-Authors: Xiaomin Ma, Xianbo Chen, Hazem H RefaiAbstract:In this paper, we propose an analytic model for performance evaluation of IEEE 802.11 ad hoc Broadcast networks without the assumption of saturation condition that is not true in safety related vehicle-to-vehicle (v2v) communication. We use a discrete time M/G/l queue to model occasional occurrences of safety related message in each vehicle. By means of probability generating function (PGF) and a recursive algorithm, we obtain solution to the analytic model. Based on the solution, we derive several important performance indices for IEEE 802.11 Broadcast Service, such as packet delay, throughput, packet delivery ratio, and Service time distribution. The proposed analytic model is validated by extensive simulations. Numerical results also reveal characteristics of the Broadcast Service in a typical v2v wireless network.
Li Li - One of the best experts on this subject based on the ideXlab platform.
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vemac a tdma based mac protocol for reliable Broadcast in vanets
IEEE Transactions on Mobile Computing, 2013Co-Authors: Hassan Aboubakr Omar, Weihua Zhuang, Li LiAbstract:The need of a medium access control (MAC) protocol for an efficient Broadcast Service is of great importance to support the high-priority safety applications in vehicular ad hoc networks (VANETs). This paper introduces VeMAC, a novel multichannel TDMA MAC protocol proposed specifically for a VANET scenario. The VeMAC supports efficient one-hop and multihop Broadcast Services on the control channel by using implicit acknowledgments and eliminating the hidden terminal problem. The protocol reduces transmission collisions due to node mobility on the control channel by assigning disjoint sets of time slots to vehicles moving in opposite directions and to road side units. Analysis and simulation results in highway and city scenarios are presented to evaluate the performance of VeMAC and compare it with ADHOC MAC, an existing TDMA MAC protocol for VANETs. It is shown that, due to its ability to decrease the rate of transmission collisions, the VeMAC protocol can provide significantly higher throughput on the control channel than ADHOC MAC.
Xianbo Chen - One of the best experts on this subject based on the ideXlab platform.
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VTC Fall - Unsaturated Performance of IEEE 802.11 Broadcast Service in Vehicle-to-Vehicle Networks
2007 IEEE 66th Vehicular Technology Conference, 2007Co-Authors: Xianbo Chen, Hazem H RefaiAbstract:In this paper, we propose an analytic model for performance evaluation of IEEE 802.11 ad hoc Broadcast networks without the assumption of saturation condition that is not true in safety related vehicle-to-vehicle (v2v) communication. We use a discrete time M/G/l queue to model occasional occurrences of safety related message in each vehicle. By means of probability generating function (PGF) and a recursive algorithm, we obtain solution to the analytic model. Based on the solution, we derive several important performance indices for IEEE 802.11 Broadcast Service, such as packet delay, throughput, packet delivery ratio, and Service time distribution. The proposed analytic model is validated by extensive simulations. Numerical results also reveal characteristics of the Broadcast Service in a typical v2v wireless network.
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Unsaturated performance of IEEE 802.11 Broadcast Service in vehicle-to-vehicle networks
IEEE Vehicular Technology Conference, 2007Co-Authors: Xiaomin Ma, Xianbo Chen, Hazem H RefaiAbstract:In this paper, we propose an analytic model for performance evaluation of IEEE 802.11 ad hoc Broadcast networks without the assumption of saturation condition that is not true in safety related vehicle-to-vehicle (v2v) communication. We use a discrete time M/G/l queue to model occasional occurrences of safety related message in each vehicle. By means of probability generating function (PGF) and a recursive algorithm, we obtain solution to the analytic model. Based on the solution, we derive several important performance indices for IEEE 802.11 Broadcast Service, such as packet delay, throughput, packet delivery ratio, and Service time distribution. The proposed analytic model is validated by extensive simulations. Numerical results also reveal characteristics of the Broadcast Service in a typical v2v wireless network.
Xiaomin Ma - One of the best experts on this subject based on the ideXlab platform.
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Unsaturated performance of IEEE 802.11 Broadcast Service in vehicle-to-vehicle networks
IEEE Vehicular Technology Conference, 2007Co-Authors: Xiaomin Ma, Xianbo Chen, Hazem H RefaiAbstract:In this paper, we propose an analytic model for performance evaluation of IEEE 802.11 ad hoc Broadcast networks without the assumption of saturation condition that is not true in safety related vehicle-to-vehicle (v2v) communication. We use a discrete time M/G/l queue to model occasional occurrences of safety related message in each vehicle. By means of probability generating function (PGF) and a recursive algorithm, we obtain solution to the analytic model. Based on the solution, we derive several important performance indices for IEEE 802.11 Broadcast Service, such as packet delay, throughput, packet delivery ratio, and Service time distribution. The proposed analytic model is validated by extensive simulations. Numerical results also reveal characteristics of the Broadcast Service in a typical v2v wireless network.
Qiang Ni - One of the best experts on this subject based on the ideXlab platform.
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multicast Broadcast Services support in ofdma based wimax systems advances in mobile multimedia
IEEE Communications Magazine, 2007Co-Authors: Tao Jiang, Weidong Xiang, Hsiaohwa Chen, Qiang NiAbstract:Multimedia stream Service provided by broadband wireless networks has emerged as an important technology and has attracted much attention. An all-IP network architecture with reliable high-throughput air interface makes orthogonal frequency division multiplexing access (OFDMA)-based mobile worldwide interoperability for microwave access (mobile WiMAX) a viable technology for wireless multimedia Services, such as voice over IP (VoIP), mobile TV, and so on. One of the main features in a WiMAX MAC layer is that it can provide'differentiated Services among different traffic categories with individual QoS requirements. In this article, we first give an overview of the key aspects of WiMAX and describe multimedia Broadcast multicast Service (MBMS) architecture of the 3GPP. Then, we propose a multicast and Broadcast Service (MBS) architecture for WiMAX that is based on MBMS. Moreover, we enhance the MBS architecture for mobile WiMAX to overcome the shortcoming of limited video Broadcast performance over the baseline MBS model. We also give examples to demonstrate that the proposed architecture can support better mobility and offer higher power efficiency.
