Wi Fi网络下的视频多播传输问题是目前的研究热点,针对当前视频多播传输方案使得处于区域边界处的用户享受到的服务质量较低、可靠性差这一不足,提出一种基于多访问点(AP)协作的视频多播可靠传输方案。通过在多个AP间展开协作,每个AP可...Wi Fi网络下的视频多播传输问题是目前的研究热点,针对当前视频多播传输方案使得处于区域边界处的用户享受到的服务质量较低、可靠性差这一不足,提出一种基于多访问点(AP)协作的视频多播可靠传输方案。通过在多个AP间展开协作,每个AP可传输完全不同或部分不同的FEC编码报文,多播接收器利用空间和时间分集来提升性能。此外,我们还提出一种支持FEC码率自适应的资源分配算法,有效地提高了有限无线资源的利用率和视频质量。最后,通过全面的仿真实验评估了本文算法的有效性,与传统的单AP点多播算法相比,本文算法使用户满意率提升了37.1%。展开更多
This paper introduces an effective software-based FEC redundant packets generating algorithm. The algorithm is based on Reed-Solomon coding over Galois Field. By operating on words of packets and performing polynomial...This paper introduces an effective software-based FEC redundant packets generating algorithm. The algorithm is based on Reed-Solomon coding over Galois Field. By operating on words of packets and performing polynomial multiplication via lookup tables, software coding efficiency is achieved to satisfy the needs of most of computer network applications. The approach to generate lookup tables is detailed.展开更多
文摘This paper introduces an effective software-based FEC redundant packets generating algorithm. The algorithm is based on Reed-Solomon coding over Galois Field. By operating on words of packets and performing polynomial multiplication via lookup tables, software coding efficiency is achieved to satisfy the needs of most of computer network applications. The approach to generate lookup tables is detailed.