Joint Caching and Routing in Congestible Networks of Arbitrary Topology
Joint Caching and Routing in Congestible Networks of Arbitrary Topology
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DOI：
10.1109/jiot.2019.2935742
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发表时间：
2019-08
影响因子：
10.6
通讯作者：
Boxi Liu;Konstantinos Poularakis;L. Tassiulas;Tao Jiang
中科院分区：
文献类型：
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作者：
Boxi Liu;Konstantinos Poularakis;L. Tassiulas;Tao Jiang
在有线和无线网络中，网内缓存是一种很有前途的减少流量负载和缓解拥塞的方法。在这篇文章中，我们研究了联合缓存和路由问题，在任意拓扑结构的可扩展网络（JoCRAT）在这个特定领域的推广以前的努力。我们表明，JoCRAT扩展了许多以前的问题，在缓存文献中，是棘手的，即使与特定的拓扑结构和/或假设无限带宽的通信。为了处理这个重要但具有挑战性的问题，我们开发了一种新的近似算法，保证性能界的基础上随机舍入技术。评估结果表明，我们提出的算法在广泛的合成和真实的网络上实现了接近最佳的性能，同时显着优于最先进的方法。
In-network caching constitutes a promising approach to reduce traffic loads and alleviate congestion in both wired and wireless networks. In this article, we study the joint caching and routing problem in congestible networks of arbitrary topology (JoCRAT) as a generalization of previous efforts in this particular field. We show that JoCRAT extends many previous problems in the caching literature that are intractable even with specific topologies and/or assumed unlimited bandwidth of communications. To handle this significant but challenging problem, we develop a novel approximation algorithm with guaranteed performance bound based on a randomized rounding technique. Evaluation results demonstrate that our proposed algorithm achieves near-optimal performance over a broad array of synthetic and real networks, while significantly outperforming the state-of-the-art methods.