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| 2. |
- Rostami, Ahmad, et al.
(författare)
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An end-to-end programmable platform for dynamic service creation in 5g networks
- 2017
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Ingår i: 2017 Optical Fiber Communications Conference and Exhibition, OFC 2017 - Proceedings. - : IEEE. - 9781943580231
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Konferensbidrag (refereegranskat)abstract
- We demonstrate how SDN and NFV can bring end-to-end programmability to heterogeneous technology domains including optical transport, radio and cloud networks, which can in turn be leveraged for agile and resource-optimized service creation.
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| 3. |
- Rostami, Ahmad, et al.
(författare)
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First experimental demonstration of orchestration of optical transport, RAN and cloud based on SDN
- 2015
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Ingår i: Conference on Optical Fiber Communication, Technical Digest Series. - : Optical Society of America. - 9781557529374
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Konferensbidrag (refereegranskat)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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| 4. |
- Rostami, Ahmad, et al.
(författare)
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Orchestration of RAN and transport networks for 5G : An SDN approach
- 2017
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Ingår i: IEEE Communications Magazine. - : Institute of Electrical and Electronics Engineers Inc.. - 0163-6804 .- 1558-1896. ; 55:4, s. 64-70
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Tidskriftsartikel (refereegranskat)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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| 5. |
- Tonini, Federico, 1990, et al.
(författare)
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A Service-Aware Autoscaling Strategy for Container Orchestration Platforms with Soft Resource Isolation
- 2023
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Ingår i: 2023 JOINT EUROPEAN CONFERENCE ON NETWORKS AND COMMUNICATIONS & 6G SUMMIT, EUCNC/6G SUMMIT. - 2575-4912 .- 2475-6490. - 9798350311020 ; , s. 454-459
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Konferensbidrag (refereegranskat)abstract
- Container orchestration platforms like Kubernetes (K8s) allow easy deployment and management of cloud native services. When deploying their services, service providers need to specify a proper amount of resources to K8s, so that the desired Quality of Service (QoS) to their users can be maintained. To cope with the varying traffic demand coming from users, they can rely on the K8s Horizontal Pod Autoscaling (HPA) mechanism. To ensure that enough resources are available when needed, the standard HPA mechanism relies on resource overprovisioning. In this way, the required QoS is achieved most of (or all) the time but at the expense of additional resources that are allocated (and charged for), while they may stay idle for significant periods of time. A way to reduce overprovisioning is provided by the soft resource isolation of K8s, which allows services to compensate for a temporary lack of resources with shared resources, i.e., idle resources of the machines where services are running. However, during traffic spikes, these idle resources may not be enough to serve the whole demand, degrading the QoS. The HPA, which is not aware of how much demand could not be served, is not always able to correctly estimate the required additional resources, further degrading the QoS. To overcome this, service providers need to leverage overprovisioning, limiting the use of shared resources. In this paper, we propose a novel mechanism for autoscaling resources in K8s that relies on service-related data to avoid the additional degradation introduced by the HPA. The proposed strategy also offers a way to tune overprovisioning and shared resources. Simulation results show that our approach can reduce idle resources by up to 60% compared with the HPA mechanism.
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| 6. |
- Tonini, Federico, 1990, et al.
(författare)
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Benefits of Pod dimensioning with best-effort resources in bare metal cloud native deployments
- 2023
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Ingår i: IEEE Networking Letters. - 2576-3156.
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Tidskriftsartikel (refereegranskat)abstract
- Container orchestration platforms automatically adjust resources to evolving traffic conditions. However, these scaling mechanisms are reactive and may lead to service degradation. Traditionally, resource dimensioning has been performed considering guaranteed (or request) resources. Recently, container orchestration platforms included the possibility of allocating idle (or limit) resources for a short time in a best-effort fashion. This paper analyzes the potential of using limit resources as a way to mitigate degradation while reducing the number of allocated request resources. Results show that a 25% CPU reduction can be achieved by relying on limit resources.
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