TABLE OF CONTENTS Mario Gerla, Ling-Jyh Chen, Tony Sun, and Guang Yang
Department of Computer Science
University of California at Los Angeles, Los Angeles, CA 90095
{gerla,cclljj,tonysun,yangg}@cs.ucla.edu
| Abstract | Video streaming has become a popular form of transferring video over the Internet. With the emergence of mobile computing needs, a successful video streaming solution demands 1) uninterrupted services even with the presence of mobility and 2) adaptive video delivery according to current link properties. In this paper we study the need and evaluate the performance of adaptive video streaming in vertical handoff scenarios. We created a simple handoff environment with Universal Seamless Handoff Architecture (USHA), and used Video Transfer Protocol (VTP) to adapt video streaming rates according to the "Eligible Rate Estimates". Using testbed measurements experiments, we verify the importance of service adaptation, as well as show the improvement of user-perceived video quality, via adapting video streaming in the vertical handoffs. |
| Keywords: | Adaptive video streaming, VTP, seamless handoff, vertical handoff. |
As the demand, production and consumption of digitized multimedia has intensified in recent years, the latest application trends have created an increasing interest in providing practical multimedia streaming systems to meet the needs of mobile computing. In order to provide uninterrupted services and maximum user-perceived quality, a successful video streaming solution needs to adapt appropriately to mobile handoff scenarios.
Consider the scenario where a user is in the midst of monitoring her biological experiment through a multimedia streaming broadcast, on a PDA device, via an 802.11b wireless connection in her office.
