论文标题
通过平行无线链接的可靠，延迟结合的传输的联合计划和编码
Joint Scheduling and Coding for Reliable, Latency-bounded Transmission over Parallel Wireless Links
论文作者
论文摘要
几种新型的工业应用涉及通过各种高通量反馈系统（例如虚拟现实（VR）和触觉/触觉信号）对车辆，起重机或移动机器人的控制。系统与操作员之间的近乎实时交互需要数据包交换中的严格延迟约束，这很难在无线通信链接上保证。在这项工作中，我们提倡在多个平行（不可靠）链接上进行数据包级的编码和数据包计划，有可能为具有定期数据生成模式的应用程序提供可靠的，延迟的通信。但是，只有通过仔细的这种机制的联合设计才能实现此目标，这些机制的相互作用可能是微妙且难以预测的。在本文中，我们首先以一般术语讨论这些方面，然后提出一个马尔可夫决策过程（MDP）模型，该模型可用于找到一种最佳利用多通道无线访问的方案，以最大程度地利用在截止日期内提供的数据块的比例。然后，我们的说明性示例被用来显示在不同无线链接不同组合下的最佳编码/调度策略，还表明，备份高比特率不可靠的MMWave链接的常见解决方案具有低比特率更稳定的sub-6 GHz链接，实际上在被认为是有效的情况下是无效的。
Several novel industrial applications involve human control of vehicles, cranes, or mobile robots through various high-throughput feedback systems, such as Virtual Reality (VR) and tactile/haptic signals. The near real-time interaction between the system and the operator requires strict latency constraints in packet exchange, which is difficult to guarantee over wireless communication links. In this work, we advocate that packet-level coding and packet scheduling over multiple parallel (unreliable) links have the potential to provide reliable, latency-bounded communication for applications with periodic data generation patterns. However, this goal can be reached only through a careful joint design of such mechanisms, whose interactions can be subtle and difficult to predict. In this paper we first discuss these aspects in general terms, and then present a Markov Decision Process (MDP) model that can be used to find a scheme that optimally exploits the multichannel wireless access in order to maximize the fraction of data blocks delivered within deadline. Our illustrative example is then used to show the optimal coding/scheduling strategies under different combinations of wireless links, also showing that the common solution of backing up a high bitrate unreliable mmWave link with a low bitrate more stable sub-6 GHz link can actually be ineffective in the considered scenario
