A Packet Selection Algorithm for Adaptive Transmission of Smoothed Video over a Wireless Channel
✍ Scribed by Zhimei Jiang; Leonard Kleinrock
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 279 KB
- Volume
- 60
- Category
- Article
- ISSN
- 0743-7315
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✦ Synopsis
This paper discusses techniques for transmitting smoothed video more efficiently over a wireless network. The fluctuation of wireless channel conditions can add a significant amount of delay to video packets and cause them to miss their play-out time. If a video is smoothed, it is possible to selectively deliver packets delayed at the base-station to reduce the impact of the missing packets on video quality. In this paper, we present a simple yet effective packet selection algorithm which accomplishes this goal. This algorithm determines whether to transmit a packet based on channel conditions as well as the likelihood that higher priority layers in the rest of the video will be delivered on time. We introduce the concept of quality index to measure the performance of the algorithm. Results from trace-driven simulations show that the performance of the algorithm is close to optimal under a wide variety of channel conditions when the threshold is set between 0.7 and 0.9. 2000