Abstract
Aiming at improving the video transmission service in Wireless Mesh Network (WMN), this paper presents a scalable video transmission system over WMN with Software Defined Networking (SDN) architecture. By integrating SDN, the control plane of WMN is separated from the data plane and been managed by a centralized controller which conduct network optimization using global network information. Following this architecture, we formulate the scalable video bitrate adaptation problem as maximizing the average video quality while keeping the link congestion probability below certain threshold. In order to solve this problem, we derive an online adaptation strategy based on large deviation principle (LDP) to estimate congestion probability and adjust the video's bitrate accordingly. To verify the performance of the proposed strategy, we implement our experiments in Mininet-wifi and the results validate the effectiveness of our algorithm.
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