The Experts below are selected from a list of 19626 Experts worldwide ranked by ideXlab platform
Jonathan Chao - One of the best experts on this subject based on the ideXlab platform.
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Low-Latency High-Efficiency Mobile Fronthaul With TDM-PON (Mobile-PON)
Journal of Optical Communications and Networking, 2018Co-Authors: Siyu Zhou, Frank Effenberger, Xiang Liu, Jonathan ChaoAbstract:To meet the capacity requirements of the exponential increase in mobile traffic and to continue to drive down the per-bit cost for mobile service providers, the cloud radio access network (C-RAN) has become a crucial step toward 5G. However, the current C-RAN architecture has some major drawbacks in terms of scalability, cost, and efficiency. In this paper, we propose and numerically demonstrate a novel mobile fronthaul architecture based on Functional Split and time-division multiplexed (TDM) passive optical networks (PONs) with a unified mobile and PON scheduler known as Mobile-PON. The optimal Functional Split distributes lower physical layer hardware toward remote radio sites. The new interface that divides the remote radio processing, and centralized baseband processing requires less bandwidth, also opens the possibility of sharing and multiplexing the bandwidth with multiple remote sites. Our combined mobile and PON scheduler is mainly based on the more complex wireless scheduling that translates its results into the TDM-PON system through LTE resource block mapping, eliminating additional scheduling delay at the PON. Without the additional scheduling delay, the cost-effective TDM-PON becomes applicable for mobile fronthaul, while the optimal fronthaul interface increases bandwidth efficiency by ∼10× over CPRI.
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mobile pon a high efficiency low latency mobile fronthaul based on Functional Split and tdm pon with a unified scheduler
Optical Fiber Communication Conference, 2017Co-Authors: Siyu Zhou, Frank Effenberger, Xiang Liu, Jonathan ChaoAbstract:We propose and numerically demonstrate a novel mobile fronthaul architecture based on Functional-Split and TDM-PON with a unified mobile-PON scheduler, eliminating the need for PON scheduling and increasing the bandwidth efficiency by ∼10× over CPRI.
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OFC - Mobile-PON: A high-efficiency low-latency mobile fronthaul based on Functional Split and TDM-PON with a unified scheduler
Optical Fiber Communication Conference, 2017Co-Authors: Zhou Siyu, Xiang Liu, Frank Effenberger, Jonathan ChaoAbstract:We propose and numerically demonstrate a novel mobile fronthaul architecture based on Functional-Split and TDM-PON with a unified mobile-PON scheduler, eliminating the need for PON scheduling and increasing the bandwidth efficiency by ∼10× over CPRI.
Luca Valcarenghi - One of the best experts on this subject based on the ideXlab platform.
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Exploiting flexible Functional Split in converged software defined access networks
Journal of Optical Communications and Networking, 2019Co-Authors: A. Marotta, Koteswararao Kondepu, Dajana Cassioli, Cristian Antonelli, Luca ValcarenghiAbstract:5G targets to offer a huge network capacity to support the expected unprecedented traffic growth due mainly to mobile and machine-type services. Thus, the 5G access network has to comply with very challenging architectural requirements. Mobile network scalability is achieved by playing appropriately with the centralization of network functions and by applying the Functional Split introducing the fronthaul. Although more advantageous in terms of network management and performance optimization, low-layer Functional Split options require larger bandwidth and lower latency to be guaranteed by the fronthaul in the access network, while preserving other concurrent fiber-to-the-x services. Thus, advanced mechanisms for the efficient management of available resources in the access network are required to control jointly both radio and optical domains. Softwarized mobile and optical segments facilitate the introduction of dedicated protocols to enable the inter-working of the two control planes. This paper proposes a new cooperation scheme to manage the adaptive flexible Functional Split in 5G networks conditioned to the resource availability in the optical access network. Techniques for the accurate estimation of available bandwidth and the associated real-time selection of the best suitable Functional Split option are investigated. Results show that the proposed software defined converged approach to wavelength and bandwidth management guarantees the optimal allocation of optical resources. The triple exponential smoothing forecasting technique enables efficient coexistence of mobile fronthaul and fixed connectivity traffic in the network, reducing traffic impairments with respect to other well-known forecasting techniques, while keeping the same level of centralization.
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INFOCOM Workshops - Experimental Demonstration of a Packet-based Protection for Seamlessly Recovering from a Multi-layer Metro Network Fronthaul Failure
IEEE INFOCOM 2019 - IEEE Conference on Computer Communications Workshops (INFOCOM WKSHPS), 2019Co-Authors: Koteswararao Kondepu, Francesco Giannone, Luca Valcarenghi, Shunmugapriya Ramanathan, Marco Tacca, Miguel Razo, Behzad Mirkhanzadeh, Andrea FumagalliAbstract:Packet loss in the fronthaul adversely affects radio services, especially the low-layer Functional Split options between Distributed Unit (DU) and Central Unit (CU). A 1+1 protection scheme is implemented in a Software Defined Networking (SDN) packet-over-optical transport test-bed, achieving seamless recovery of the 7–1 Split option from an optical link failure in the fronthaul.
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Orchestrating lightpath recovery and flexible Functional Split to preserve virtualized RAN connectivity
Journal of Optical Communications and Networking, 2018Co-Authors: Koteswararao Kondepu, Francesco Giannone, Piero Castoldi, N Sambo, Andrea Sgambelluri, Luca ValcarenghiAbstract:In the next-generation radio access network (NG RAN), the next-generation evolved NodeBs (gNBs) will be, likely, Split into virtualized central units (CUs) and distributed units (DUs) interconnected by a fronthaul network. Because of fronthaul latency and capacity requirements, optical metro-ring networks are among the main candidates for supporting converged 5G and non-5G services. In this scenario, a degradation in the quality of transmission of the lightpaths connecting DU and CU can be revealed (or anticipated) based on monitoring techniques. Thus, the lightpath transmission parameters can be adapted to maintain the required bit error rate (BER). However, in specific cases, the original requested capacity between DU and CU could be not guaranteed, thus impacting the service. In this case, another DU-CU connectivity should be considered, relying on a change of the so-called Functional Split. This study proposes a two-step recovery scheme orchestrating lightpath transmission adaptation and Functional Split reconfiguration to guarantee the requested connectivity in a virtualized RAN fronthaul. Results show that, for the connections that cannot be transported by the original lightpath, a graceful degradation followed by a recovery is possible within tens of seconds.
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efficient management of flexible Functional Split through software defined 5g converged access
International Conference on Communications, 2018Co-Authors: A. Marotta, Koteswararao Kondepu, Dajana Cassioli, Cristian Antonelli, Luca ValcarenghiAbstract:Softwarization of mobile and optical networks facilitates the inter-working between control planes of the two domains, allowing a more efficient management of available resources. Radio resource utilization benefits from the centralization of mobile network Functionalities with the application of high-order Functional Split options by fronthauling. However, higher-order options require larger bandwidth and lower latency in the fronthaul. Advanced mechanisms for the joint control of the access network represent the sole solution to support such fronthaul requirements. This paper proposes a new cooperation scheme to manage the adaptive flexible Functional Split in 5G networks conditioned to the resource availability in the optical access network. Results show that the proposed converged approach guarantees the optimal allocation of optical resources through a software defined wavelength and bandwidth allocation. The proposed scheme adapts to current traffic demand and simultaneously allows the mobile network to take advantage of the highest possible centralization of mobile network functions by leveraging flexible Functional Split adaptively compliant to the current optical traffic demand.
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orchestrating lightpath adaptation and flexible Functional Split to recover virtualized ran connectivity
Optical Fiber Communication Conference, 2018Co-Authors: Koteswararao Kondepu, Francesco Giannone, Piero Castoldi, N Sambo, Luca ValcarenghiAbstract:This study shows that a two-step recovery scheme orchestrating lightpath transmission adaptation and evolved NodeB (eNB) Functional Split reconfiguration preserves the Virtualized RAN fronthaul connectivity even when network capacity is scarce.
Rami Langar - One of the best experts on this subject based on the ideXlab platform.
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user slicing scheme with Functional Split selection in 5g cloud ran
Wireless Communications and Networking Conference, 2020Co-Authors: Salma Matoussi, Ilhem Fajjari, Nadjib Aitsaadi, Rami LangarAbstract:Next Generation 5G Radio Access Network (NGRAN) is envisioned to integrate the slicing approach to build a flexible network supporting diverse use-cases with customized architectures, features and services. RAN processing Functional Splits have been standardized to add new deployment design capabilities and enhance cost efficiency. A further challenge consists in how to meet the multitude use-case’s requirements while considering different design models in the physical infrastructure. Current related works are tackling the slice embedding problem from a cell-centric perspective. However, to achieve greater flexibility and better resource utilization, a user-centric approach should be more exploited. In this paper, we propose a SLICE-HPSO scheme that jointly harnesses radio, processing and link resources at the user level to build multiple user slices on top of the physical infrastructure. Our proposal is tailored to different user quality-of-service requirements and to the diverse Functional Splits resource requests. SLICE-HPSO is in compliance with the 3GPP and optimizes further the heterogeneous resource usage while meeting the scalability requirement.
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5G RAN: Functional Split Orchestration Optimization
IEEE Journal on Selected Areas in Communications, 2020Co-Authors: Salma Matoussi, Ilhem Fajjari, Nadjib Aitsaadi, Salvatore Costanzo, Rami LangarAbstract:5G RAN aims to evolve new technologies spanning the Cloud infrastructure, virtualization techniques and Software Defined Network capabilities. Advanced solutions are introduced to Split the functions of the Radio Access Network (RAN) between centralized and distributed locations. Such paradigms improve RAN flexibility and reduce the infrastructure deployment cost without impacting the user quality of service. We propose a novel Functional Split orchestration scheme that aims at minimizing the RAN deployment cost, while considering the requirements of its processing network functions and the capabilities of the Cloud infrastructure. With a fine grained approach on user basis, we show that the proposed solution optimizes both processing and bandwidth resource usage, while minimizing the overall energy consumption compared to i) cell-centric, ii) distributed and iii) centralized Cloud-RAN approaches. Moreover, we evaluate the effectiveness of our proposal in a 5G experimental prototype, based on Open Air Interface (OAI). We show that our solution achieves good performance in terms of total deployment cost and resolution time.
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WCNC - User Slicing Scheme with Functional Split Selection in 5G Cloud-RAN
2020 IEEE Wireless Communications and Networking Conference (WCNC), 2020Co-Authors: Salma Matoussi, Ilhem Fajjari, Nadjib Aitsaadi, Rami LangarAbstract:Next Generation 5G Radio Access Network (NGRAN) is envisioned to integrate the slicing approach to build a flexible network supporting diverse use-cases with customized architectures, features and services. RAN processing Functional Splits have been standardized to add new deployment design capabilities and enhance cost efficiency. A further challenge consists in how to meet the multitude use-case’s requirements while considering different design models in the physical infrastructure. Current related works are tackling the slice embedding problem from a cell-centric perspective. However, to achieve greater flexibility and better resource utilization, a user-centric approach should be more exploited. In this paper, we propose a SLICE-HPSO scheme that jointly harnesses radio, processing and link resources at the user level to build multiple user slices on top of the physical infrastructure. Our proposal is tailored to different user quality-of-service requirements and to the diverse Functional Splits resource requests. SLICE-HPSO is in compliance with the 3GPP and optimizes further the heterogeneous resource usage while meeting the scalability requirement.
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joint Functional Split and resource allocation in 5g cloud ran
International Conference on Communications, 2019Co-Authors: Salma Matoussi, Ilhem Fajjari, Nadjib Aitsaadi, Rami Langar, Salvatore CostanzoAbstract:5G radio access networks are expected to leverage the Cloud environment for building a cost effective network infrastructure. Advanced mechanisms with Functional Split are introduced to Split the RAN Functionalities into centralized and distributed locations. This novelty has brought more flexibility to RAN deployment but is still conditioned to the radio resource availability. In this paper, we propose a new orchestration framework for joint radio and Functional Split scheme on user basis. Specifically, we address the orchestration of heterogeneous resources in a multi-sited Cloud-RAN infrastructure. The key idea behind our proposal is to optimize jointly the Functional Split and End-to-End resource allocation in order to achieve an enhanced throughput satisfaction and a low deployment cost. Results show that our approach E2E-US optimizes the heterogeneous resource usage. Indeed, the appropriate user radio load and Functional Split are dynamically and jointly selected, which outperforms cell centric Functional Split approaches.
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ICC - Joint Functional Split and Resource Allocation in 5G Cloud-RAN
ICC 2019 - 2019 IEEE International Conference on Communications (ICC), 2019Co-Authors: Salma Matoussi, Ilhem Fajjari, Nadjib Aitsaadi, Rami Langar, Salvatore CostanzoAbstract:5G radio access networks are expected to leverage the Cloud environment for building a cost effective network infrastructure. Advanced mechanisms with Functional Split are introduced to Split the RAN Functionalities into centralized and distributed locations. This novelty has brought more flexibility to RAN deployment but is still conditioned to the radio resource availability. In this paper, we propose a new orchestration framework for joint radio and Functional Split scheme on user basis. Specifically, we address the orchestration of heterogeneous resources in a multi-sited Cloud-RAN infrastructure. The key idea behind our proposal is to optimize jointly the Functional Split and End-to-End resource allocation in order to achieve an enhanced throughput satisfaction and a low deployment cost. Results show that our approach E2E-US optimizes the heterogeneous resource usage. Indeed, the appropriate user radio load and Functional Split are dynamically and jointly selected, which outperforms cell centric Functional Split approaches.
Kaiten Feng - One of the best experts on this subject based on the ideXlab platform.
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qoe oriented admission control and resource allocation for Functional Split millimeter wave fronthaul networks
Vehicular Technology Conference, 2019Co-Authors: Tunping Huang, Chunhao Fang, Peirong Li, Kaiten FengAbstract:In this paper, a quality of experience (QoE)- oriented beam management and admission control (AC) problem is investigated with consideration of time-varying channels and delay requirement for different Functional Split (FS) millimeter (mm)-wave fronthaul networks. The original problem aims to maximize time-averaged QoE of distributed units (DUs) with co-existence of short-term and long-term constraints, which makes the considered problem intractable. By leveraging Lyapunov optimization technique, the formulated problem is converted into a series of AC and beam allocation (BA) problems. Two AC and BA (ACBA) algorithms are proposed to solve the converted problem based on whether it is implemented at central unit (CU-ACBA) or DU (DU-ACBA). Simulation results demonstrate technical insights and applicability of the proposed algorithms by indicating the appropriate scenario for each FS option (FSO).
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VTC Spring - QoE-Oriented Admission Control and Resource Allocation for Functional Split Millimeter-Wave Fronthaul Networks
2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring), 2019Co-Authors: Huang Tun-ping, Chunhao Fang, Kaiten FengAbstract:In this paper, a quality of experience (QoE)- oriented beam management and admission control (AC) problem is investigated with consideration of time-varying channels and delay requirement for different Functional Split (FS) millimeter (mm)-wave fronthaul networks. The original problem aims to maximize time-averaged QoE of distributed units (DUs) with co-existence of short-term and long-term constraints, which makes the considered problem intractable. By leveraging Lyapunov optimization technique, the formulated problem is converted into a series of AC and beam allocation (BA) problems. Two AC and BA (ACBA) algorithms are proposed to solve the converted problem based on whether it is implemented at central unit (CU-ACBA) or DU (DU-ACBA). Simulation results demonstrate technical insights and applicability of the proposed algorithms by indicating the appropriate scenario for each FS option (FSO).
Siyu Zhou - One of the best experts on this subject based on the ideXlab platform.
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Low-Latency High-Efficiency Mobile Fronthaul With TDM-PON (Mobile-PON)
Journal of Optical Communications and Networking, 2018Co-Authors: Siyu Zhou, Frank Effenberger, Xiang Liu, Jonathan ChaoAbstract:To meet the capacity requirements of the exponential increase in mobile traffic and to continue to drive down the per-bit cost for mobile service providers, the cloud radio access network (C-RAN) has become a crucial step toward 5G. However, the current C-RAN architecture has some major drawbacks in terms of scalability, cost, and efficiency. In this paper, we propose and numerically demonstrate a novel mobile fronthaul architecture based on Functional Split and time-division multiplexed (TDM) passive optical networks (PONs) with a unified mobile and PON scheduler known as Mobile-PON. The optimal Functional Split distributes lower physical layer hardware toward remote radio sites. The new interface that divides the remote radio processing, and centralized baseband processing requires less bandwidth, also opens the possibility of sharing and multiplexing the bandwidth with multiple remote sites. Our combined mobile and PON scheduler is mainly based on the more complex wireless scheduling that translates its results into the TDM-PON system through LTE resource block mapping, eliminating additional scheduling delay at the PON. Without the additional scheduling delay, the cost-effective TDM-PON becomes applicable for mobile fronthaul, while the optimal fronthaul interface increases bandwidth efficiency by ∼10× over CPRI.
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mobile pon a high efficiency low latency mobile fronthaul based on Functional Split and tdm pon with a unified scheduler
Optical Fiber Communication Conference, 2017Co-Authors: Siyu Zhou, Frank Effenberger, Xiang Liu, Jonathan ChaoAbstract:We propose and numerically demonstrate a novel mobile fronthaul architecture based on Functional-Split and TDM-PON with a unified mobile-PON scheduler, eliminating the need for PON scheduling and increasing the bandwidth efficiency by ∼10× over CPRI.
