Design and Analysis of QoS Guaranteed Multimedia Transmission Mechanisms in Wireless Networks
Date Issued
2016
Date
2016
Author(s)
Chang, Che-Yu
Abstract
Nowadays, delivering multimedia traffic in IEEE 802.11 wireless net- works has become more popular than before. Multimedia applications such as voice/video applications need the quality of service (QoS) guaranteed and the user experience in an important metric. However, the existing medium access method of 802.11 wireless networks is not designed for providing real-time services, not to mention to provide guaranteed QoS. In this thesis, we analyze the traffic character of multimedia transferring and try to solve the existing problem of providing QoS in 802.11 wireless networks. We first summarize the types of multimedia traffic and figure out the difficulty of the IEEE 802.11 medium access control (MAC) protocol for delivering multimedia traffic. Ac- cording to the network type, we propose a QoS provision centralized schedul- ing algorithm for the classical infrastructure network. Furthermore, to follow up the innovation of radio technology, we propose a novel and high-efficiency channel access method called multi-polling controlled access (MPCA) for the latest released protocol, IEEE 802.11ac. In addition, we also implement a quality adjustment strategy (QAS) to provide better user-experience. Finally, to solve the problem of providing QoS in ad hoc networks, we consider the IEEE 802.11p vehicular ad hoc network (VANET) and propose a V2V QoS guaranteed channel access to support QoS.
Subjects
QoS
QoE
Multimedia
802.11
MAC
WLANs
VANETs
Type
thesis
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