| 1. |
- Fiorani, Matteo, et al.
(author)
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Modeling energy performance of C-RAN with optical transport in 5G network scenarios
- 2016
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In: Journal of Optical Communications and Networking. - : IEEE. - 1943-0620 .- 1943-0639. ; 8:11
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Journal article (peer-reviewed)abstract
- The deployment of new 5G wireless interfaces based on massive multiantenna transmission and beamforming is expected to have a significant impact on the complexity and power consumption of the transport network. This paper analyzes the energy performance of four radio access network (RAN) architectures, each one utilizing a different option for splitting the baseband processing functions. The radio segment is based on Long-Term Evolution (LTE) and 5G radio access technologies. The transport segment is based on optical wavelength division multiplexing, where coherent and direct detection transmissions are considered. The energy consumption of each RAN architecture is weighted against i) the benefits for the radio segment as a function of the level of centralization of the baseband processing functions and ii) the power consumption levels needed to accommodate the capacity generated at each base station. Results show that, with LTE radio interfaces, the energy consumption of the transport network amounts to only a few percent of the overall network power consumption. As a result, fully centralized LTE radio architectures are a viable option, with energy savings of at least 27% compared with conventional distributed architectures. On the other hand, with advanced 5G radio interfaces, centralized architectures, if not carefully designed, might become impractical due to the excessive energy consumption of the transport network (i.e., as a result of the huge capacity to be accommodated). This aspect can be mitigated via a careful joint design of the radio and the transport network (i.e., leveraging on appropriate optical transmission techniques and compromising where needed on the radio network performance).
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| 2. |
- Lednicki, Luka, et al.
(author)
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Industrial IoT with Distributed Cloud Experiments using 5G LTE
- 2019
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In: IEEE International Workshop on Factory Communication Systems - Proceedings, WFCS. - : Institute of Electrical and Electronics Engineers Inc.. - 9781728112688
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Conference paper (peer-reviewed)abstract
- With the evolution of 5G it is envisioned that industrial applications with different requirements on latency and availability can be offloaded to a distributed cloud infrastructure. For example, some applications with stringent timing requirements can be hosted at the edge of the mobile network, closer to the control hardware, whereas some applications with relaxed timing requirements can be hosted in a cloud located geographically further away.This paper presents a feasibility study of hosting control applications based on OPC UA communication in a distributed cloud with LTE connectivity to the control hardware. The study includes measurements of communication round-trip time and availability of the network comparing cases where the application is hosted at a local or regional cloud. The results indicate that it is feasible to deploy industrial applications in a distributed cloud with timing requirements in the order of 100ms.
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| 3. |
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| 4. |
- Ranaweera, Chathurika, et al.
(author)
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Optical X-haul Options for 5G Fixed Wireless Access : Which One to Choose?
- 2018
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In: IEEE INFOCOM 2018 - IEEE CONFERENCE ON COMPUTER COMMUNICATIONS WORKSHOPS (INFOCOM WKSHPS). - : IEEE. - 9781538659793
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Conference paper (peer-reviewed)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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| 5. |
- Raza, Muhammad Rehan, et al.
(author)
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Dynamic Resource Sharing for C-RANs with Joint Orchestration of Radio and Transport
- 2016
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In: ECOC 2016 42th European Conference on Optical Communication Proceedings, September 18 - 22, 2016, Düsseldorf, Germany. - : VDE Verlag GmbH. - 9783800742745 ; , s. 1001-1003
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Conference paper (peer-reviewed)abstract
- We present a resource allocation strategy for centralized radio access network architectures able to adapt to the wireless network capacity requirements. Both simulation and emulation results show that it is possible to reuse up to 33.3% of the transport resources.
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| 6. |
- Rostami, Ahmad, et al.
(author)
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First experimental demonstration of orchestration of optical transport, RAN and cloud based on SDN
- 2015
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In: Conference on Optical Fiber Communication, Technical Digest Series. - : Optical Society of America. - 9781557529374
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Conference paper (peer-reviewed)abstract
- We design and experimentally demonstrate the first resource orchestration across DWDM optical transport, radio access networks (RANs) and cloud domains based on SDN. The orchestration enables agile service creation and optimized resource allocation.
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| 7. |
- Rostami, Ahmad, et al.
(author)
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Orchestration of RAN and transport networks for 5G : An SDN approach
- 2017
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In: IEEE Communications Magazine. - : Institute of Electrical and Electronics Engineers Inc.. - 0163-6804 .- 1558-1896. ; 55:4, s. 64-70
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Journal article (peer-reviewed)abstract
- The fifth generation of mobile networks is planned to be commercially available in a few years. The scope of 5G goes beyond introducing new radio interfaces, and will include new services like low-latency industrial applications, as well as new deployment models such as cooperative cells and densification through small cells. An efficient realization of these new features greatly benefit from tight coordination among radio and transport network resources, something that is missing in current networks. In this article, we first present an overview of the benefits and technical requirements of resource coordination across radio and transport networks in the context of 5G. Then, we discuss how SDN principles can bring programmability to both the transport and radio domains, which in turn enables the design of a hierarchical, modular, and programmable control and orchestration plane across the domains. Finally, we introduce two use cases of SDN-based transport and RAN orchestration, and present an experimental implementation of them in a testbed in our lab, which confirms the feasibility and benefits of the proposed orchestration.
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| 8. |
- Skubic, Björn, et al.
(author)
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Optical transport solutions for 5G fixed wireless access [Invited]
- 2017
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In: Journal of Optical Communications and Networking. - : OPTICAL SOC AMER. - 1943-0620 .- 1943-0639. ; 9:9, s. D10-D18
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Journal article (peer-reviewed)abstract
- With the advent of 5G, fixed wireless access (FWA) has emerged as a promising candidate for rolling out fixed broadband services. By means of radio simulations, we define a 5G radio deployment scenario for FWA that can meet the service requirements of future fixed broadband access. Different transport requirements imposed by different radio access network (RAN) split options are considered and a broad range of optical transport technologies/systems to support the FWA scenario is analyzed. For higher-layer RAN split options, we find that conventional 10G passive optical networks (XG-PONs) and coarse wavelength-division multiplexing (CWDM) technologies are the most cost effective. CWDM provides improved support for low-latency services while XG-PON facilitates future migration to fiber to the home. For lower-layer RAN splits, point-to-point (PtP) fiber or PtP-WDM is required. In the considered scenario, CWDM and PtP technologies are found to be the most cost effective.
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