摘要： 针对网络电视业务的802.11无线局域网数据传输问题，提出一种视频流组播优化机制，基于视频帧区分的方法，对关键帧I帧采用可靠组播机制传输，对非关键的B帧和P帧采用组播机制传输。仿真结果表明，该机制可以在丢帧率和数据延迟之间取得较好的折中，尤其是在无线网络带宽不足的情况下，能够有效提高数据传输后视频的观看质量。
关键词:
无线局域网,
组播,
GE无线信道,
帧区分,
视频流
Abstract: Aiming at data transmission question of Internet Protocol Television(IPTV) in 802.11 Wireless Local Area Network(WLAN), this paper proposes a video streaming multicast optimization mechanism, in which the key I-frames are transmitted by using reliable multicast communication mechanism and B-frames and P-frames are transmitted by using multicast communication mechanism. Simulation results show that the mechanism based on frame classification can get a flexible compromise between frame loss rate and packet delay, especially when wireless network bandwidth is insufficient, it improves the watching quality of video after data transmission.
Key words:
Wireless Local Area Network(WLAN),
multicast,
GE wireless channel,
frame classification,
video streaming
中图分类号:
尹春雷, 文光俊, 冯正勇, 刘洪盛. 无线局域网视频流组播优化机制[J]. 计算机工程, 2011, 37(10): 213-215.
YIN Chun-Lei, WEN Guang-Dun, FENG Zheng-Yong, LIU Hong-Cheng. Multicast Optimization Mechanism for Video Streaming in Wireless Local Area Network[J]. Computer Engineering, 2011, 37(10): 213-215.