论文标题
带有不平衡渠道的编码缓存：经验方法的质量
Coded Caching with Uneven Channels: A Quality of Experience Approach
论文作者
论文摘要
无线编码的缓存方案的速率性能通常受每个传输时间插槽中给定的多播组中最低可实现的每个用户速率的限制。在本文中，我们提供了一种新的编码缓存计划，从而减轻了对多媒体申请的突出案例的最坏用户效应。在我们的计划中，我们没有最大限度地提高所有服务用户的对称速率，而是最大化经验的总质量（QOE）；其中每个用户的QoE被定义为该用户所感知的视频质量。我们表明，新方案需要解决NP-HARD优化问题。因此，我们提供了两种启发式算法以近似方式解决它。并在数值上证明了所提出的近似值的近距离。我们的方法允许为每个用户的独特视频质量分配，使无线编码的缓存方案更适合于现实世界实现。
The rate performance of wireless coded caching schemes is typically limited by the lowest achievable per-user rate in the given multicast group, during each transmission time slot. In this paper, we provide a new coded caching scheme, alleviating this worst-user effect for the prominent case of multimedia applications. In our scheme, instead of maximizing the symmetric rate among all served users, we maximize the total quality of experience (QoE); where QoE at each user is defined as the video quality perceived by that user. We show the new scheme requires solving an NP-hard optimization problem. Thus, we provide two heuristic algorithms to solve it in an approximate manner; and numerically demonstrate the near-optimality of the proposed approximations. Our approach allows flexible allocation of distinct video quality for each user, making wireless coded caching schemes more suitable for real-world implementations.
