Implementation of Foreseen Handover Scheme for WLANs on Software Defined Networks

• Main Authors: Lai, Kuan-Jen, 賴冠任
• Other Authors: Wang, Hao-Li
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/5e67qr

碩士 === 國立嘉義大學 === 資訊工程學系研究所 === 106 === Handover plays an important role in concern of mobility in Wireless Local Area Networks (WLANs). To improve WLAN handover, many researchers introduced Software Defined Network (SDN) in WLAN to have higher flexibility. In SDN, controller always determines handover decision, which cause a large amount of handover delay. To reduce the handover delay, we propose a Foreseen Handover scheme for WLANs on SDN. At first, controller determines the time point of handover based on collected signal data on a fixed route and mobility pattern. Secondly, controller issues handover command in advance in consideration of message transmission delay. We implement the proposed scheme on ODIN-based SDN architecture. Our implementation reduces user interruption and computation to make the system run more smoothly. Experiment results show that foreseen handover scheme can handover on time, and achieve higher throughput.