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arXiv 1801.08620cs.NIcs.ITmath.IT
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OFDMA网络中感知干扰的联合动态干扰协调和异构QoS提供

Queue-Aware Joint Dynamic Interference Coordination and Heterogeneous QoS Provisioning in OFDMA Networks

Alirezan Sharifian, Raviraj Adve

摘要:

我们提出了云无线接入网络,不仅提供异构的服务质量(QoS)的速率,重要的是,延迟敏感的应用程序,但也共同优化的频率复用模式的算法。重要的是,与相关的作品,我们占随机到达,通过队列意识,不像大多数作品只集中在一个单一的帧,我们认为QoS措施平均在多个帧涉及一组闭环控制。我们将此问题建模为多小区优化,以最大化受QoS约束的总效用,表示为最小平均速率或最大平均延迟。由于我们考虑动态干扰协调与动态用户关联,即使在整数松弛后,问题也不是凸的。我们将问题转化为帧速率的优化,服从于交织的原始和对偶问题的分解。这个优化问题的解决方案提供了联合决策调度,动态干扰协调,重要的是,不像大多数作品在这一领域,动态用户关联。此外,我们提出了一种新的方法来管理不可行的负载。大量的仿真证实,该设计响应瞬时负载,异构用户和AP的位置,信道条件和QoS约束,同时,如果需要的话,保持低中断时,处理不可行的负载。与基线比例公平计划的比较说明了所取得的成果。

英文摘要:

We propose algorithms for cloud radio access networks that not only provide heterogeneous quality of-service (QoS) for rate- and, importantly, delay-sensitive applications, but also jointly optimize the frequency reuse pattern. Importantly, unlike related works, we account for random arrivals, through queue awareness and, unlike majority of works focusing on a single frame only, we consider QoS measures averaged over multiple frames involving a set of closed loop controls. We model this problem as multi-cell optimization to maximize a sum utility subject to the QoS constraints, expressed as minimum mean-rate or maximum mean-delay. Since we consider dynamic interference coordination jointly with dynamic user association, the problem is not convex, even after integer relaxation. We translate the problem into an optimization of frame rates, amenable to a decomposition into intertwined primal and dual problems. The solution to this optimization problem provides joint decisions on scheduling, dynamic interference coordination, and, importantly, unlike most works in this area, on dynamic user association. Additionally, we propose a novel method to manage infeasible loads. Extensive simulations confirm that the design responds to instantaneous loads, heterogeneous user and AP locations, channel conditions, and QoS constraints while, if required, keeping outage low when dealing with infeasible loads. Comparisons to the baseline proportional fair scheme illustrate the gains achieved.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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