Browsing by Author "Tsai, Pei-Kan"

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Optimizing The Service Capacity of SDN-based Cellular Networks with Service Chaining and NFV
(2016)
Gau, Rung-Hung
;
Chiu, Hsiao-Ting
;
Tsai, Pei-Kan
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電機工程學系
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Department of Electrical and Computer Engineering
In this paper, we investigate the service capacity of SDN-based cellular networks with service chaining and network function virtualization. Due to service chaining requirements, the service capacity is different from the well-known maximum flow-minimum-cut capacity. To maximize the service capacity, we take a novel approach of traffic engineering. In particular, we formulate and solve a linear optimization problem to obtain optimal service paths for flows and an optimal bandwidth allocation for virtual machines. We also include numerical results that justify the usage of the proposed approach.
SDN-based Optimal Traffic Engineering for Cellular Networks with Service Chaining
(2016)
Gau, Rung-Hung
;
Tsai, Pei-Kan
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
In this paper, we propose using software-defined networking technologies for optimal traffic engineering in cellular networks with service chaining. We study the case in which virtual machines are used to support network services and each flow requires multiple network services. To minimize the maximum load of virtual machines and guarantee that the sum rate of admitted flows is large enough, we formulate an optimization problem that is inherently different from the minimum cost flow problem. We transform the optimization problem to a linear programming problem, which can be solved in polynomial time. We also use numerical results to justify the usage of the proposed approach.