论文标题
具有连续信道状态的低延迟无线传输的确定性调度
Deterministic Scheduling for Low-latency Wireless Transmissions with Continuous Channel States
论文作者
论文摘要
高能源效率和低潜伏期一直是无线网络设计师实现的重要目标。实现这些目标的一种有效方法是基于不同层的系统状态（例如排队状态和渠道状态）的跨层调度。但是，跨层设计中的大多数现有作品都集中在基于离散通道状态的调度上。考虑到更接近实际情况的连续渠道状态，很少关注。因此，在本文中，我们研究了与频道连续状态空间中单个通信链路中数据传输的最佳跨层调度策略。调度的目的是在限制平均延迟时最小化数据传输的平均功率。更具体地说，最佳的跨层调度问题被提出为变分问题。基于变分问题，我们通过建设性证明来展示确定性调度策略的最佳性。确定性政策的最佳性使我们能够压缩从概率政策到确定性政策的搜索空间。
High energy efficiency and low latency have always been the significant goals pursued by the designer of wireless networks. One efficient way to achieve these goals is cross-layer scheduling based on the system states in different layers, such as queuing state and channel state. However, most existing works in cross-layer design focus on the scheduling based on the discrete channel state. Little attention is paid to considering the continuous channel state that is closer to the practical scenario. Therefore, in this paper, we study the optimal cross-layer scheduling policy on data transmission in a single communication link with continuous state-space of channel. The aim of scheduling is to minimize the average power for data transmission when the average delay is constrained. More specifically, the optimal cross-layer scheduling problem was formulated as a variational problem. Based on the variational problem, we show the optimality of the deterministic scheduling policy through a constructive proof. The optimality of the deterministic policy allows us to compress the searching space from the probabilistic policies to the deterministic policies.
