Browsing by Author "Shen, Yi-Hsin"

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Achieving Energy Saving with QoS Guarantee for WLAN using SDN
(2016)
Chen, Yu-Jia
;
Shen, Yi-Hsin
;
Wang, Li-Chun
;
電機工程學系
;
Department of Electrical and Computer Engineering
In recent years, the wireless local area networks (WLAN) access points (APs) are being deployed rapidly in the offices and the campuses to satisfy the quality of service (QoS) requirements such as network bandwidth. However, many empirical studies show that a large fraction of idle WLAN resources result in the significant energy losses. To reduce the energy consumption without violating the QoS requirement, we propose a QoS-aware AP energy saving mechanism using software defined network (SDN). We leverage the capability of the SDN controller to dynamically monitor the network condition information to estimate the network bandwidth requirement of the devices and then manage the network forwarding to provide seamless handover. Our experimental results show that the proposed scheme can effectively reduce the number of power-on WLAN APs while still providing QoS guarantee, such as network bandwidth and handover cost.
Traffic-aware Load Balancing for M2M Networks Using SDN
(2014)
Chen, Yu-Jia
;
Shen, Yi-Hsin
;
Wang, Li-Chun
;
電機工程學系
;
Department of Electrical and Computer Engineering
To relieve the heavy loading caused by burst machine-to-machine (M2M) traffic and also satisfy various quality of service (QoS) requirements, load balancing techniques are often introduced in M2M networks. In recent years, software defined networking (SDN) has shown the possibility of improving load balancing technique. In this paper, we propose traffic-aware load balancing mechanism for M2M networks using SDN. The proposed mechanism can satisfy different QoS requirements of M2M traffic by instant traffic identification and dynamic traffic rerouting, which leverage the capability of SDN to dynamically monitor and control the entire network.