| Summary: | 碩士 === 國立交通大學 === 電機工程學系 === 103 === In this thesis, we exploit the benefits of Software-Defined Network (SDN) specially for Machine-to-Machine (M2M) and wireless networks. For M2M networks, we focus on the load balancing issues of the M2M cloud center due to the traffic from enormous M2M devices. For wireless networks, we focus on the energy issue of wireless networks while the number of mobile devices grows rapidly.
For M2M, to relieve the heavy loads caused by burst M2M traffic subject to the various quality of service (QoS) requirements, load balancing are often applied to M2M networks.
In recent years, SDN has be shown to improve the performance of load balancing techniques.
We further propose a traffic-aware SDN-based load balancing mechanism for M2M networks.
The proposed mechanism can satisfy different the QoS requirements of M2M traffic to dynamically monitor and control the entire network, and thus reroute different traffic type dynamically.
Based on the experimental results of our SDN testbed, we demonstrate that the proposed scheme can significantly reduce the service response time and provide quality of service while relieving the heavy workload of SDN controller.
For the wireless local area networks (WLAN), access points (APs) are being rapidly deployed to satisfy QoS.
However, many empirical studies showed that many idle APs result in the significant energy losses.
To overcome this issue, we propose a SDN-assisted QoS-aware AP energy saving mechanism.
We leverage the capability of the SDN controller to dynamically monitor the network conditions to estimate the network bandwidth requirement of the devices and then manage the network forwarding for seamless handover.
Our experimental results show that the proposed scheme can effectively reduce the energy consumption of WLAN APs, while still satisfying the QoS requirements.
In this thesis, we consider two scenarios : 1) SDN-based load balancer for M2M networks, and
2) SDN-based WLAN for energy efficiency improvement.
We find that SDN-enabled load balancer can improve the performance of M2M networks.
Furthermore SDN can improve the energy efficiency of WLAN with different QoS requirement.
Because of the high flexibility provided by SDN, both M2M and WLAN we demonstrate that can be enhanced significantly with different QoS requirement.
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