| 1. |
- Kilper, Dan, et al.
(författare)
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Optics
- 2023
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Ingår i: Proceedings - 2023 IEEE Future Networks World Forum: Future Networks: Imagining the Network of the Future, FNWF 2023.
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Konferensbidrag (refereegranskat)abstract
- Optical networks have long played a central role in telecommunication networks, forming the fiber backbone of the internet. Over time, fiber optic systems have evolved and found deployment increasingly closer to the network edge. Today, optical systems extend to the server network interface cards and home access networks. New application areas have emerged, such as the use of free space communications using LiFi technologies, space communication networks between satellites, and ground stations. Looking ahead, optical systems in many areas will continue to be driven by the need for higher speeds and capacity to keep up with traffic demands. In addition to faster interface speeds, parallel fibers or spatial division multiplexing will be used for future capacity growth. In several application areas, new functionality is expected, such as low latency in XHaul networks and optical switching and co-packaged optics in data centers. LiFi will become critical for mitigating RF interference for in-building networks. Intense research is underway to develop quantum networks to connect quantum computers. This general trend toward new functionalities for optical systems, moving beyond capacity growth in fiber networks, is driven in large part by the increasing performance and demands of today's user equipment and applications. From the network edge to the data centers, components are reliant on optics. However, many of these developments are occurring quite independently and this situation carries the risk of creating problems down the road when eventually all of these components need to be seamlessly connected to maximaze efficiency. Therefore, integration of optics into these new applications and the higher levels of functionality demanded of optics motivate the use of roadmaps to guide research and development to overcome future roadblocks.
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| 2. |
- Lim, Christina, et al.
(författare)
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Optical X-haul for 5G /6G: Design and Deployment Standpoint
- 2022
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Ingår i: Proceedings - 2022 IEEE Future Networks World Forum, FNWF 2022. ; , s. 507-512
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Konferensbidrag (refereegranskat)abstract
- In this paper, we review the work we have carried out in the investigation of the transport network in a hybrid fiber-wireless system to cater for the next generation wireless networks. We have demonstrated advanced coordination functionality in the physical layer to enable coordination between remote radio heads. We have also devised an optimization framework to jointly optimize the wireless and optical network that minimizes the deployment cost. We conclude the paper by providing insights into a reconfigurable optical architecture that can be used to support wireless networks of 6G and beyond.
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| 3. |
- Ranaweera, Chathurika, et al.
(författare)
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Design and deployment of optical x-haul for 5G, 6G, and beyond: progress and challenges [Invited]
- 2023
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Ingår i: Journal of Optical Communications and Networking. - 1943-0620 .- 1943-0639. ; 15:9, s. D56-D66
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Forskningsöversikt (refereegranskat)abstract
- Sixth generation (6G) wireless technology, which is the next giant leap in the evolution of wireless communication, has been gaining great interest from academia, industry, and the general public due to its capabilities and the applications that are expected to be supported. Optical x-haul is becoming increasingly important as a key element of the 6G ecosystem due to the increasing demand for high data rates and low latency with the emergence of new 6G applications and use cases. The ability of optical x-haul to support high data rates and low latency along with its scalability and high-reliability performance makes it an essential transport technology for future wireless networks of 6G and beyond. However, optical and wireless technologies operate in different domains and with different standards. Therefore, integration of optical x-haul and 6G needs careful consideration with emphasis on bringing network intelligence softwarization. This is particularly important in supporting the quality of service requirements of emerging applications in the most cost-effective and sustainable manner. To this end, this paper reviews the research that has been carried out in the investigation of the optical x-haul network in a hybrid fiber-wireless system to cater to the next generation of wireless networks. Especially, we review the research carried out in open radio access network architecture, coordination functionalities in radio-over-fiber networks, optimization frameworks that can be used to jointly optimize wireless and optical network deployments, and reconfigurable optical x-haul. We conclude the paper by providing insights into research challenges that we need to overcome in integrating optical x-haul in the 6G ecosystem to support emerging applications.
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| 4. |
- Ranaweera, Chathurika, et al.
(författare)
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Optical Transport Network Design for 5G Fixed Wireless Access
- 2019
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Ingår i: Journal of Lightwave Technology. - 0733-8724 .- 1558-2213. ; 37:16, s. 3893-3901
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Tidskriftsartikel (refereegranskat)abstract
- The fifth generation (5G) of mobile technology, 5G is anticipated to be a significant leap in the evolution of mobile communication. 5G will be designed to attain 1000 times higher data volumes, 10 times lower latency, and 100 times more connected devices than its predecessor, 4G. Due to 5Gs ability to sustain high bandwidth per unit area, 5G is considered to be a cost-efficient solution to provide fixed wireless access (FWA) to households on a large scale. FWA is seen as an attractive alternative for fixed broadband access in scenarios where last mile access based on wired technologies is not economically viable. While approaches for enhancing user experience in a 5G FWA environment are investigated in the research community, the problem of providing cost-effective high capacity transport for FWA deployments still remains a major challenge. This is particularly challenging due to diverse transport network architectures and requirements imposed by different 5G deployment models. This paper addresses this problem by formulating a generalized joint-optimization framework to simultaneously plan wireless access and optical transport for 5G FWA networks in order to minimize the deployment cost while meeting various network requirements. We demonstrate the applicability of the proposed framework by applying it to a real scenario with a range of deployment options and where different types of optical x-haul solutions are considered. The results provide a cornerstone for deployment strategies that will be imperative for realizing a future-proof and cost-effective broadband access network.
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| 5. |
- Ranaweera, Chathurika, et al.
(författare)
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Optical X-haul Options for 5G Fixed Wireless Access : Which One to Choose?
- 2018
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Ingår i: IEEE INFOCOM 2018 - IEEE CONFERENCE ON COMPUTER COMMUNICATIONS WORKSHOPS (INFOCOM WKSHPS). - : IEEE. - 9781538659793
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Konferensbidrag (refereegranskat)abstract
- 5G is anticipated to be a significant leap in the evolution of mobile communication. Being designed to facilitate 10 to 100 times more capacity than 4G, 5G is considered to be the most cost-efficient solution to provide Fixed Wireless Access (FWA)to households on a large scale where providing last mile access using wired solution might not be economically viable. With a range of promises to deliver user experience improvements, facilitating cost-efficient data transportation between FWA users and network core still remains an unsolved issue, given the enormous volume of data that will be traversing the superior 5G network. This work addresses this compelling problem by formulating a joint-optimization framework to plan and analyze the optimal deployment of diverse optical x-haul strategies that can be used in 5G-based FWA networks. The work provides a cornerstone for deployment strategies that will be imperative to realize future-proof FWA network.
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| 6. |
- Ranaweera, Chathurika, et al.
(författare)
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Rethinking of Optical Transport Network Design for 5G/6G Mobile Communication
- 2021
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Ingår i: IEEE Future Networks Tech Focus.
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Tidskriftsartikel (refereegranskat)abstract
- Driven by the increasing use of emerging smart mobile applications, mobile technology is continuously and rapidly advancing towards the next generation communication systems such as 5G and 6G. However, the transport network, which needs to provide low latency and reliable connectivity between hundreds of thousands of cell sites and the network core, has not advanced at the same pace. This article provides insight into how we can solve the fundamental challenges of implementing cost-optimal transport and 5G and beyond mobile networks simultaneously while satisfying the network and user requirements irrespective of the radio access network's architecture.
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| 7. |
- Tao, Yijie, et al.
(författare)
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Automated Control Plane for Reconfigurable Optical Crosshaul in Next Generation RAN
- 2024
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Ingår i: 2024 Optical Fiber Communications Conference and Exhibition, OFC 2024 - Proceedings.
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Konferensbidrag (refereegranskat)abstract
- The paper proposes a unified automated control plane of an SDN-enabled densely deployed reconfigurable optical crosshaul for future radio access networks, with tested ability to perform sub-second automated reconfiguration on low-cost and low-bandwidth control plane.
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| 8. |
- Tao, Yijie, et al.
(författare)
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Link Failure Recovery in SDN-Enabled Reconfigurable 6G Crosshaul Architecture
- 2022
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Ingår i: Proceedings - 2022 IEEE Future Networks World Forum, FNWF 2022. ; , s. 413-417
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Konferensbidrag (refereegranskat)abstract
- While 5G infrastructure is being rapidly rolled out around the world, it is clear that a key strategy to meet the required high speed, ubiquitous connection is via small cell deployment and cell densification. This results in increased complexity in orchestrating and managing the Radio Access Network (RAN). To this end, we proposed a novel Software Defined Networking (SDN)-enabled reconfigurable crosshaul architecture for supporting heterogeneous hauling technologies and enhancing RAN flexibility and robustness. This is achieved by crosshaul control and data plane separation and a novel control plane. In particular, the link failure recovery procedure in the proposed architecture is evaluated to assess the robustness of the network. Simulation results illustrated that the fast recovery time will not interrupt the mobile users' connectivity with RAN. However, mobile users' data plane shows impacts on different RAN protocol layers due to the failure.
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| 9. |
- Tao, Yijie, et al.
(författare)
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Reconfigurable optical crosshaul architecture for 6G radio access networks
- 2023
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Ingår i: Journal of Optical Communications and Networking. - 1943-0620 .- 1943-0639. ; 15:12, s. 1008-1018
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Tidskriftsartikel (refereegranskat)abstract
- The radio access network (RAN) architecture is undergoing a significant evolution to support the next-generation mobile networks and their emerging applications. To realize scalable and sustainable deployment and operations, RAN needs to consider the requirements of 6G and beyond wireless technologies such as ultra densification of cells, higher data rates, ubiquitous coverage, and new radio spectrum in the millimeter-wave band. This calls for a careful redesign of every aspect of RAN, including its crosshaul. The crosshaul is an important network segment in future RAN, capable of transporting diverse traffic types with varying stringent requirements within RAN. The crosshaul towards 6G is envisioned to be highly intelligent, reconfigurable, and adaptable to dynamic service requirements and network conditions. To this end, we propose a software defined network (SDN)-enabled reconfigurable optical crosshaul architecture (ROCA) that supports heterogeneous crosshaul transport technologies and dynamic functional splittings. ROCA enables efficient and intelligent control of the crosshaul data plane. The proposed architecture with a set of the next-generation RAN (NG-RAN) transport interfaces is evaluated using network models built on the ns-3 network simulator. Simulation results demonstrate the strengths and weaknesses of different crosshaul interfaces in agreement with the understanding of respective NG-RAN interfaces from the literature, which validates the modeling accuracy. We then demonstrate the reconfigurability of the architecture using a dynamic scenario with different reconfiguration strategies for meeting the user and network demands. The results indicate that ROCA serves as a scalable and flexible foundation for supporting high-capacity delay-stringent RAN that can be used in 6G and beyond wireless technologies.
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