Online User-AP Association with Predictive Scheduling in Wireless Caching Networks
Xi Huang, Shuang Zhao, Xin Gao, Ziyu Shao, Hua Qian and, Yang Yang

TL;DR
This paper introduces PUARA, a predictive scheduling scheme for wireless caching networks that balances throughput and queue stability, significantly reducing delays by leveraging predicted information.
Contribution
It formulates a novel stochastic optimization problem for online user-AP association with predictive scheduling and proposes PUARA, a near-optimal solution with proven stability and delay benefits.
Findings
PUARA achieves near-optimal throughput.
PUARA provides tunable control between throughput and stability.
PUARA significantly reduces delays with predicted information.
Abstract
For wireless caching networks, the scheme design for content delivery is non-trivial in the face of the following tradeoff. On one hand, to optimize overall throughput, users can associate their nearby APs with great channel capacities; however, this may lead to unstable queue backlogs on APs and prolong request delays. On the other hand, to ensure queue stability, some users may have to associate APs with inferior channel states, which would incur throughput loss. Moreover, for such systems, how to conduct predictive scheduling to reduce delays and the fundamental limits of its benefits remain unexplored. In this paper, we formulate the problem of online user-AP association and resource allocation for content delivery with predictive scheduling under a fixed content placement as a stochastic network optimization problem. By exploiting its unique structure, we transform the problem into…
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Taxonomy
TopicsCaching and Content Delivery · Cooperative Communication and Network Coding · Advanced Wireless Network Optimization
