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LaSR: A Supple Multi-Connectivity Scheduler for Multi-RAT OFDMA Systems

机译:LaSR:用于多RAT OFDMA系统的充足的多连接调度器

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摘要

Network densification over space and spectrum is expected to be key to enabling the requirements of next generation mobile systems. The pitfall is that radio resource allocation becomes substantially more complex. In this paper, we propose LaSR, a practical multi-connectivity scheduler for OFDMA-based multi-RAT systems. LaSR makes optimal discrete control actions by solving a sequence of simple optimization problems that do not require prior information of traffic patterns. In marked contrast to previous work, the flexibility of our approach allows us to construct scheduling policies that achieve a good balance between system cost and utility satisfaction, while jointly operate across heterogeneous RATs, accommodate real-system requirements, and guarantee system stability. Examples of system requirements considered in this paper include (but are not limited to): constraints on how scheduling data can be encoded onto signaling protocols (e.g., LTE's DCI), delays when turning on/off radio units, or on/off cycles when using unlicensed spectrum. We evaluate our scheduler via a thorough simulation campaign in a variety of scenarios with e.g., mobile users, RATs using unlicensed spectrum (using a duty cycle access mechanism), imperfect queue state information, and constrained signaling protocol.
机译:在空间和频谱上的网络致密化有望成为实现下一代移动系统需求的关键。陷阱在于无线电资源分配变得更加复杂。在本文中,我们提出了LaSR,这是一种适用于基于OFDMA的多RAT系统的实用多连接调度程序。 LaSR通过解决一系列不需要流量模式先验信息的简单优化问题来做出最佳的离散控制动作。与以前的工作形成鲜明对比的是,我们的方法的灵活性使我们能够构建调度策略,从而在系统成本和效用满意度之间取得良好的平衡,同时跨异构RAT共同运行,适应实际系统需求并保证系统稳定性。本文考虑的系统要求示例包括(但不限于):如何将调度数据编码到信令协议(例如LTE的DCI)上的限制,打开/关闭无线电单元时的延迟或打开/关闭无线电单元时的打开/关闭周期使用非授权频谱。我们在各种情况下(例如移动用户,使用未许可频谱的RAT(使用占空比访问机制),不完善的队列状态信息和受约束的信令协议)通过彻底的模拟活动评估调度程序。

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