The Experts below are selected from a list of 94092 Experts worldwide ranked by ideXlab platform
Marco Centenaro - One of the best experts on this subject based on the ideXlab platform.
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Comparison of Collision-Free and Contention-Based Radio Access Protocols for the Internet of Things
IEEE Transactions on Communications, 2017Co-Authors: Marco Centenaro, Stephan Saur, Andreas Weber, Lorenzo Vangelista, Volker BraunAbstract:The fifth-generation (5G) cellular networks will face the challenge of integrating the traditional broadband services with the Internet of Things (IoT), which is characterized by sporadic uplink transmissions of small data packets. Indeed, the Access Procedure of the previous generation cellular network (4G) is not able to support IoT traffic efficiently because it requires a large amount of signaling for the connection setup before the actual data transmission. In this context, we introduce two innovative radio Access protocols for sporadic transmissions of small data packets, which are suitable for 5G networks because they provide a resource-efficient packet delivery exploiting a connection-less approach. The core of this paper resides in the derivation of an analytical framework to evaluate the performance of all the aforementioned protocols. The final goal is the comparison between 4G and 5G radio Access solutions employing both our analytical framework and computer simulations. The performance evaluation results show the benefits of the protocols envisioned for 5G in terms of signaling overhead and Access latency.
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ICC - M2M massive Access in LTE: RACH performance evaluation in a Smart City scenario
2016 IEEE International Conference on Communications (ICC), 2016Co-Authors: Michele Polese, Marco Centenaro, Andrea Zanella, Michele ZorziAbstract:Several studies assert that the random Access Procedure of the Long Term Evolution (LTE) cellular standard may not be effective whenever a massive number of simultaneous connection attempts are performed by terminals, as may happen in a typical Internet of Things or Smart City scenario. Nevertheless, simulation studies in real deployment scenarios are missing because many system-level simulators do not implement the LTE random Access Procedure in detail. In this paper, we propose a patch for the LTE module of ns-3, one of the most prominent open-source network simulators, to improve the accuracy of the routine that simulates the LTE Random Access Channel (RACH). The patched version of the random Access Procedure is compared with the default one and the issues arising from massive simultaneous Access from mobile terminals in LTE are assessed via a simulation campaign.
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m2m massive Access in lte rach performance evaluation in a smart city scenario
International Conference on Communications, 2016Co-Authors: Michele Polese, Marco Centenaro, Andrea Zanella, Michele ZorziAbstract:Several studies assert that the random Access Procedure of the Long Term Evolution (LTE) cellular standard may not be effective whenever a massive number of simultaneous connection attempts are performed by terminals, as may happen in a typical Internet of Things or Smart City scenario. Nevertheless, simulation studies in real deployment scenarios are missing because many system-level simulators do not implement the LTE random Access Procedure in detail. In this paper, we propose a patch for the LTE module of ns-3, one of the most prominent open-source network simulators, to improve the accuracy of the routine that simulates the LTE Random Access Channel (RACH). The patched version of the random Access Procedure is compared with the default one and the issues arising from massive simultaneous Access from mobile terminals in LTE are assessed via a simulation campaign.
Michele Zorzi - One of the best experts on this subject based on the ideXlab platform.
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Initial Access in Millimeter Wave Cellular Systems
IEEE Transactions on Wireless Communications, 2016Co-Authors: C. Nicolas Barati, S. Amir Hosseini, Sylvie Rangan, Marco Mezzavilla, Shivendra S Panwar, Thanasis Korakis, Michele ZorziAbstract:Millimeter wave (mmWave) bands have attracted considerable recent interest for next-generation cellular systems due to the massive available spectrum at these frequencies. However, a key challenge in designing mmWave cellular systems is initial Access—the Procedure by which a mobile device establishes an initial link-layer connection to a cell. MmWave communication relies on highly directional transmissions and the initial Access Procedure must thus provide a mechanism by which initial transmission directions can be searched in a potentially large angular space. Design options are compared considering different scanning and signaling Procedures to evaluate Access delay and system overhead. The channel structure and multiple Access issues are also considered. The results of our analysis demonstrate significant benefits of low-resolution fully digital architectures in comparison with single stream analog beamforming.
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ICC - M2M massive Access in LTE: RACH performance evaluation in a Smart City scenario
2016 IEEE International Conference on Communications (ICC), 2016Co-Authors: Michele Polese, Marco Centenaro, Andrea Zanella, Michele ZorziAbstract:Several studies assert that the random Access Procedure of the Long Term Evolution (LTE) cellular standard may not be effective whenever a massive number of simultaneous connection attempts are performed by terminals, as may happen in a typical Internet of Things or Smart City scenario. Nevertheless, simulation studies in real deployment scenarios are missing because many system-level simulators do not implement the LTE random Access Procedure in detail. In this paper, we propose a patch for the LTE module of ns-3, one of the most prominent open-source network simulators, to improve the accuracy of the routine that simulates the LTE Random Access Channel (RACH). The patched version of the random Access Procedure is compared with the default one and the issues arising from massive simultaneous Access from mobile terminals in LTE are assessed via a simulation campaign.
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m2m massive Access in lte rach performance evaluation in a smart city scenario
International Conference on Communications, 2016Co-Authors: Michele Polese, Marco Centenaro, Andrea Zanella, Michele ZorziAbstract:Several studies assert that the random Access Procedure of the Long Term Evolution (LTE) cellular standard may not be effective whenever a massive number of simultaneous connection attempts are performed by terminals, as may happen in a typical Internet of Things or Smart City scenario. Nevertheless, simulation studies in real deployment scenarios are missing because many system-level simulators do not implement the LTE random Access Procedure in detail. In this paper, we propose a patch for the LTE module of ns-3, one of the most prominent open-source network simulators, to improve the accuracy of the routine that simulates the LTE Random Access Channel (RACH). The patched version of the random Access Procedure is compared with the default one and the issues arising from massive simultaneous Access from mobile terminals in LTE are assessed via a simulation campaign.
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Directional Initial Access for Millimeter Wave Cellular Systems
arXiv: Information Theory, 2015Co-Authors: C. Nicolas Barati, S. Amir Hosseini, Sylvie Rangan, Marco Mezzavilla, Shivendra S Panwar, Thanasis Korakis, Michele ZorziAbstract:The millimeter wave (mmWave) bands have recently attracted considerable interest for next-generation cellular systems due to the massive available bandwidths at these frequencies. However, a key challenge in designing mmWave cellular systems is initial Access -- the Procedure by which a mobile establishes an initial link-layer connection to a base station cell. MmWave communication relies on highly directional transmissions and the initial Access Procedure must thus provide a mechanism by which initial transmission directions can be searched in a potentially large angular space. Design options are compared considering different scanning and signaling Procedures to evaluate Access delay and system overhead. The channel structure and multiple Access issues are also considered. The analysis demonstrates significant benefits of low-resolution fully digital architectures in comparison to single stream analog beamforming.
Volker Braun - One of the best experts on this subject based on the ideXlab platform.
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Comparison of Collision-Free and Contention-Based Radio Access Protocols for the Internet of Things
IEEE Transactions on Communications, 2017Co-Authors: Marco Centenaro, Stephan Saur, Andreas Weber, Lorenzo Vangelista, Volker BraunAbstract:The fifth-generation (5G) cellular networks will face the challenge of integrating the traditional broadband services with the Internet of Things (IoT), which is characterized by sporadic uplink transmissions of small data packets. Indeed, the Access Procedure of the previous generation cellular network (4G) is not able to support IoT traffic efficiently because it requires a large amount of signaling for the connection setup before the actual data transmission. In this context, we introduce two innovative radio Access protocols for sporadic transmissions of small data packets, which are suitable for 5G networks because they provide a resource-efficient packet delivery exploiting a connection-less approach. The core of this paper resides in the derivation of an analytical framework to evaluate the performance of all the aforementioned protocols. The final goal is the comparison between 4G and 5G radio Access solutions employing both our analytical framework and computer simulations. The performance evaluation results show the benefits of the protocols envisioned for 5G in terms of signaling overhead and Access latency.
Kae Won Choi - One of the best experts on this subject based on the ideXlab platform.
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hybrid random Access and data transmission protocol for machine to machine communications in cellular networks
IEEE Transactions on Wireless Communications, 2015Co-Authors: Dimas Tribudi Wiriaatmadja, Kae Won ChoiAbstract:To address random Access channel (RACH) congestion and high signaling overhead problems of machine-to-machine (M2M) communication in cellular networks, we propose a new design of a random Access Procedure that is exclusively engineered for the M2M communication. Our design has two prominent features. One is a fast signaling process that allows M2M user equipment to transmit data right after preamble transmission on a physical RACH to reduce the signaling overhead. The other is a self-optimization feature that allows the cellular system to produce optimal M2M throughput by adaptively changing resource block (RB) composition and an Access barring parameter according to the amount of available RBs and the M2M traffic load. We derive a closed-form analytic formula for the M2M traffic throughput and propose a joint adaptive resource allocation and Access barring scheme based on the analytic results. By simulation, we show that the proposed scheme exhibits a near-optimal performance in terms of the capacity.
Zhijian Lin - One of the best experts on this subject based on the ideXlab platform.
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WCNC - Analysis of discovery and Access Procedure for D2D communication in 5G cellular network
2016 IEEE Wireless Communications and Networking Conference, 2016Co-Authors: Zhijian Lin, Zhibin Gao, Lianfen Huang, Xiaojiang Du, Liang Du, Mohsen GuizaniAbstract:Device-to-device (D2D) communication, which is defined as a direct communication between two mobile users without traversing the Base Station (BS) or the core network to offload the increasing traffic to the user equipments, is one of the key technologies in the fifth generation (5G) of wireless communication systems. Discovery and communication are the basic two features to fulfill the need for the D2D communication. However, Most of existing D2D studies focused on the communication issues always assume that the discovery is completed. In this paper, we propose two strategies of device discovery and Access scheme for the 5G cellular networks. Then the performance analysis based on two dimensional discrete time Markov process model is provided. In addition, we present numerical simulation on the Matlab platform. The simulation results demonstrate the viability of the proposed scheme.
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Analysis of discovery and Access Procedure for D2D communication in 5G cellular network
2016 IEEE Wireless Communications and Networking Conference, 2016Co-Authors: Zhijian Lin, Zhibin Gao, Lianfen Huang, Xiaojiang Du, Liang Du, Mohsen GuizaniAbstract:Device-to-device (D2D) communication, which is defined as a direct communication between two mobile users without traversing the Base Station (BS) or the core network to offload the increasing traffic to the user equipments, is one of the key technologies in the fifth generation (5G) of wireless communication systems. Discovery and communication are the basic two features to fulfill the need for the D2D communication. However, Most of existing D2D studies focused on the communication issues always assume that the discovery is completed. In this paper, we propose two strategies of device discovery and Access scheme for the 5G cellular networks. Then the performance analysis based on two dimensional discrete time Markov process model is provided. In addition, we present numerical simulation on the Matlab platform. The simulation results demonstrate the viability of the proposed scheme.
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Efficient device-to-device discovery and Access Procedure for 5G cellular network
Wireless Communications and Mobile Computing, 2015Co-Authors: Zhijian Lin, Zhibin Gao, Lianfen Huang, Liang Du, Xiaojiang DuAbstract:A large number of new data-consuming applications are emerging, and many of them involve mobile users. In the next generation of wireless communication systems, device-to-device D2D communication is introduced as a new paradigm to offload the increasing traffic to the user equipment. Before the traffic transmission, D2D discovery and Access Procedure is the first important step which needs to be completed. In this paper, our goal is to design a device discovery and Access scheme for the fifth generation cellular networks. We first present two types of device discovery and Access Procedures. Then we provide performance analysis based on the Markov process model. In addition, we present numerical simulation on the Vienna Matlab platform. The simulation results demonstrate the viability of the proposed scheme. Copyright © 2015 John Wiley & Sons, Ltd.
