Current Projects

Multimedia Streaming over WWANs Key Words:  Multimedia streaming, quality of service, WWAN, channel-adaptive coding

Project Members

• Aytac Azgin

Project Description

The initiation of the usage of the long-term anticipated ubiquitous access to multimedia applications over wireless networks depends on the performance of the networking protocols in carrying audio and video multimedia streaming applications. Although data transmission capacity of wireless networks are expected to observe considerable increase in the near-future, several challenges are yet to overcome. First, the characteristics of the underlying network (i.e., channel impairments) will continue to play significant role in the perceived performance. Second, variations in device capabilities (i.e., processing, energy, storage, and display) require the applications to adapt themselves to preserve an acceptable quality of service level in order to satisfy the user needs. The inherent requirements of multimedia applications such as latency, jitter, packet loss rate, and buffering have to be overcome under the stated challenges. In this project, we propose techniques to exploit network/channel/device characteristics in the determination of the optimum coding parameters to enhance the perceived quality of transmission at the end user.

Related Publications

• Dihong Tian, Yen-Chi Lee, Ghassan Al-Regib and Yucel Altunbasak, “Packetized media streaming over multiple wireless channels,” in Proc. IEEE Int. Conf. on Communications (ICC), Paris, France, June 2004 [pdf]
• Mehmet U. Demircin and Yucel Altunbasak, “Finite-Horizon FEC-Rate Adaptation for Real-Time Wireless Multimedia,” in Proc. IEEE Wireless Communications and Networking Conference (WCNC), Atlanta, GA, March 2004 [pdf]
• Dihong Tian, Xiaohuan Li, Ghassan Al-Regib, Yucel Altunbasak and Joel R. Jackson, “Optimal packet scheduling for wireless video streaming with error-prone feedback,” in Proc. IEEE Wireless Communications and Networking Conference (WCNC), Atlanta, GA, March 2004 [pdf]