Researcher:
Nacaklı, Selin

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PhD Student

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Selin

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Nacaklı

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Nacaklı, Selin
Yılmaz, Selin

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2015 - 201952020 - 20211

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Researcher Of Publications: search.filters.isAuthorOfPublication.a797b15f-9e09-4c04-9070-c22de6f943a1

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Now showing 1 - 6 of 6
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    End-to-end service-level management framework over multi-domain software defined networks
    (Institute of Electrical and Electronics Engineers (IEEE), 2016) N/A; N/A; N/A; Department of Electrical and Electronics Engineering; Bağcı, Kadir Tolga; Nacaklı, Selin; Şahin, Kemal Emrecan; Tekalp, Ahmet Murat; PhD Student; PhD Student; Master Student; Faculty Member; Department of Electrical and Electronics Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; College of Engineering; N/A; N/A; N/A; 26207
    We introduce a distributed, dynamic, end-to-end (E2E) service-level management framework over a multi-domain SDN in order to enable end users to negotiate with their service providers a level of service according to their needs and budget. In this framework, the service provider offers multiple levels of service and allocates network resources to each user to satisfy specific service level requests in a fair manner. To this effect, controllers of different domains negotiate with each other to satisfy the service level parameters of service requests, where functions that manage E2E services collaborate with functions that manage network resources of respective domains. The proposed framework and procedures have been verified over a newly developed large-scale multi-domain SDN emulation environment./ Öz: Çok-alanlı yazılım tanımlı ağlarda (YTA), son kul- lanıcıların servis sağlayıcıları ile belirli bir servis kalitesi için uzlaşmalarını sağlamak amacıyla da gıtık, dinamik ve uçtan uca servis kalitesi yönetimi önermekteyiz. Bu yapıda servis saglayıcıları birçok servis seviyesi önermekte ve ağ kaynaklarını kullanıcılara adil bir ¸sekilde bölü¸stürmektedir. Bu amaçla, uçtan uca servisleri ve her bir alanın kaynaklarını yöneten modüller işbirligi yaparak farklı alanların ağ yöneticilerinin servis istek- lerinin kısıtlarını sağlayacak şekilde birbirleri ile uzlaşmalarına olanak sağlamaktadır. Önerilen yapı ve modüller yeni geliştirilmiş büyük ölçekli çok-alanlı bir YTA’da test edilmiştir.
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    Managed P2P-assisted video services over SDN
    (Institute of Electrical and Electronics Engineers (IEEE), 2018) N/A; Department of Electrical and Electronics Engineering; Nacaklı, Selin; Tekalp, Ahmet Murat; PhD Student; Faculty Member; Department of Electrical and Electronics Engineering; Graduate School of Sciences and Engineering; College of Engineering; N/A; 26207
    We propose a new architecture for managed peer-to-peer (P2P) assisted video services using software defined networks (SDN), WebRTC data channel and cloud computing technologies. In the proposed architecture, the video service provider (VSP) is configured as a cloud content-distribution network (CDN) service. The network service provider (NSP) employs SDN, consisting of a controller cloud, a backbone network, and multiple edge network clouds. The proposed managed P2P-assisted video service avoids unauthorized usage of P2P services while reducing the load on VSP content distribution network (CDN) servers and providing better quality of experience (QoE) to end-users.
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    Virtualized cloud video services
    (Institute of Electrical and Electronics Engineers (IEEE), 2017) N/A; N/A; N/A; Department of Electrical and Electronics Engineering; Nacaklı, Selin; Şahin, Kemal Emrecan; Bağcı, Kadir Tolga; Tekalp, Ahmet Murat; PhD Student; Master Student; PhD Student; Faculty Member; Department of Electrical and Electronics Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; College of Engineering; N/A; N/A; N/A; 26207
    We propose new architectures for collaborative video services using software defined networks (SDN) and cloud computing technologies. In the proposed architectures, the video service provider (VSP) is configured as a cloud service. The network service provider (NSP) employs SDN as a cloud service, consisting of a controller cloud and multiple edge network clouds. The proposed centralized and distributed collaborative cloud video services overcome quality of experience (QoE) fluctuations per flow and unfairness between multiple DASH clients employing TCP receive window adaptation over a network slice with reserved capacity as we show that quality of service (QoS) reservation alone is not sufficient to supply fair and steady QoE to all clients. In the centralized approach, the fair-share bitrate of each client is calculated by the traffic engineering module of the NSP, while in the distributed approach the clients collaborate with each other to calculate their own fair shares. Experimental results show that both collaboration architectures perform better than the competitive approach using standard TCP.
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    Controlling P2P-CDN live streaming services at SDN-enabled multi-access edge datacenters
    (Ieee-Inst Electrical Electronics Engineers Inc, 2021) N/A; N/A; Department of Electrical and Electronics Engineering; Nacaklı, Selin; Tekalp, Ahmet Murat; PhD Student; Faculty Member; Department of Electrical and Electronics Engineering; Graduate School of Sciences and Engineering; College of Engineering; 341857; 26207
    Recognizing the shortcomings of current hybrid peer-to-peer (P2P) content-distribution network (CDN) video solutions and the potential of emerging multi-access edge datacenters, we propose a novel P2P-CDN service model that is hosted at software defined networks (SDN)-enabled multi-access edge datacenters operated by network service providers (NSP). An important feature of the proposed service architecture is that both CDN access by peers and P2P video streaming between peers within edge access networks are fully controlled by cooperation of the video content provider (VCP) and NSP to optimize video service key performance indicators (KPI). The proposed fully controlled P2P-CDN architecture with P2P group formation and chunk scheduling managed at edge datacenters reduces the load on CDN servers while overcoming quality of experience (QoE) fluctuations per flow and unfairness between multiple heterogeneous video-resolution clients over reserved access network slices. Other advantages of this service include: i) better video quality and lower delay for clients; ii) better use of edge network resources; iii) avoiding illegal, unauthorized P2P content sharing. To the best of our knowledge, there are no solutions in the literature that address P2P-CDN services managed at NSP-edge datacenters combining P2P-assisted CDN, SDN-assisted edge computing, and premium service over reserved slices. Experimental results show that the proposed P2P-CDN service deployed at SDN-enabled edge datacenters provides excellent service KPI compared to other state-of-the-art solutions.
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    Dynamic end-To-end service-level negotiation over multi-domain software defined networks
    (Institute of Electrical and Electronics Engineers (IEEE), 2016) N/A; N/A; N/A; Department of Electrical and Electronics Engineering; Bağcı, Kadir Tolga; Nacaklı, Selin; Şahin, Kemal Emrecan; Tekalp, Ahmet Murat; PhD Student; PhD Student; Master Student; Faculty Member; Department of Electrical and Electronics Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; Graduate School of Sciences and Engineering; College of Engineering; N/A; N/A; N/A; 26207
    We introduce a dynamic end-To-end (E2E) servicelevel management framework, which enables quality of experience to end users and efficient and flexible management of network resources for service providers, over a multi-domain SDN. In the proposed fully-distributed E2E service management framework, controllers of different domains negotiate with each other for the service level parameters of a specific service request. The main contribution of this paper is an automated dynamic E2E service-level negotiation procedure, where functions that manage E2E services can collaborate with functions that manage network resources of respective domains. The proposed framework and procedures have been verified over a large-scale multi-domain SDN emulation environment.
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    Video streaming over software defined networks with server load balancing
    (IEEE, 2015) N/A; Department of Electrical and Electronics Engineering; N/A; Nacaklı, Selin; Tekalp, Ahmet Murat; Ünlütürk, Bige Deniz; PhD Student; Faculty Member; Master Student; Department of Electrical and Electronics Engineering; Graduate School of Sciences and Engineering; College of Engineering; Graduate School of Sciences and Engineering; N/A; 26207; N/A
    Software Defined Networking is a promising Internet architecture to deliver multimedia with end-to-end quality of service (QoS) since it enables optimal dynamic management of network resources and on-demand QoS provisioning by a network operator. We propose a framework for server load-balancing over a single-operator OpenFlow network to improve the quality of service levels of video streaming services. We design a new OpenFlow controller application for dynamic server load balancing by continuous monitoring of load of each video server and dynamic rerouting of clients to alternate servers with lower loads when an overload condition is detected. The proposed controller application is implemented on top of an open source OpenDaylight controller. Our results show that the proposed load-balancer improves the quality of streaming video experienced by end-users, and OpenFlow provides a powerful framework to provide video services with end-to-end quality of service over the future Internet.