计算机科学 ›› 2021, Vol. 48 ›› Issue (11): 356-362.doi: 10.11896/jsjkx.200900080
吉晓祥1,2, 沈航1,2, 白光伟1
JI Xiao-xiang1,2, SHEN Hang1,2, BAI Guang-wei1
摘要: 文中提出了异构无线网络下基于非正交多址的可伸缩视频多播的资源管理框架。该框架综合考虑了不同基站间的频谱切分、切片内多播组之间的频谱分配和多播组内的发射功率分配,目的是最大化多播组所有用户设备的整体视频质量。考虑到每个多播组请求视频的不同、不同的用户设备位置和小基站间的干扰,将联合资源管理问题转化为一个整数线性规划问题,并将该优化问题解耦为多播组内发射功率划分问题和基站间频谱切分与基站内多组频谱资源分配问题。前者通过多重循环求得了叠加编码每一层所需的最优发射功率,后者通过背包算法得到了最优的解。仿真结果表明,所提方案在频谱利用率和用户设备平均视频质量方面优于现有方案。
中图分类号:
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