Video Streaming over WLANs with QoS support

• Main Author: Zhang, Yu
• Other Authors: Foh Chuan Heng
• Format: Theses and Dissertations
• Language: English
• Published: 2009
• Subjects: DRNTU::Engineering::Computer science and engineering::Computer systems organization::Computer-communication networks
• Online Access: https://hdl.handle.net/10356/20691
• Institution: Nanyang Technological University

With the deployment of wireless local area networks (WLANs), a low cost WLAN adaptor provides users with a convenient access to the Internet in any area with a WLAN access point (AP). Furthermore, with the QoS extension of the WLAN, it becomes an efficient and practical wireless access platform with QoS support for various applications. Among the applications, video streaming is one of the most attractive applications for WLANs. However, due to the characteristics of wireless communications such as high error rate, limited bandwidth, time-varying channel conditions and dynamic network users, wireless video streaming faces many challenges. A framework should be employed to link the QoS facilities supported by the WLAN with the video applications. This thesis deals with the issue of the video streaming over WLANs with QoS support. This thesis first introduces a new centralized hybrid scheme for high speed wireless local area networks, which combines the Out-of-Band Signaling (OBS), the enhanced distributed channel access (EDCA) in IEEE 802.11e with the deficit round robin (DRR) technologies to achieve better system performance. We show via simulation that our overall system performance is higher than that of the EDCA in IEEE 802.11e, and a certain quality of service and fairness are achieved.