Analysis on Cache-Enabled Wireless Heterogeneous Networks

By Chenchen Yang, Yao Yao, Zhiyong Chen, Bin Xia. IEEE Transactions on Wireless Communications, 2015

316 citations recorded by the source corpus.

Caching popular multimedia content is a promising way to unleash the ultimate potential of wireless networks. In this paper, we propose and analyze cache-based content delivery in a three-tier heterogeneous network (HetNet), where base stations (BSs), relays, and device-to-device (D2D) pairs are included. We advocate proactively caching popular content in the relays and parts of the users with caching ability when the network is off-peak. The cached content can be reused for frequent access to offload the cellular network traffic. The node locations are first modeled as mutually independent Poisson point processes (PPPs) and the corresponding content access protocol is developed. The average ergodic rate and outage probability in the downlink are then analyzed theoretically. We further derive the throughput and the delay based on the multiclass processor-sharing queue model and the continuous-time Markov process. According to the critical condition of the steady state in the HetNet, the maximum traffic load and the global throughput gain are investigated. Moreover, impacts of some key network characteristics, e.g., the heterogeneity of multimedia contents, node densities, and the limited caching capacities, on the system performance are elaborated on to provide valuable insight.

Subfields: Computer Networks and Communications

View Paper: https://www.semanticscholar.org/paper/f121be68681c4298c9b8d8eda0109a0d6711a57c

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Citations in the corpus

Wireless caching: technical misconceptions and business barriers (2016, background): “In addition to initially studied single-tier network [23], the more detailed modeling and analysis of heterogeneous networks [24], [25], online caching policies [26], uniform caching [27], power consumption [28], and a Markovian mobility [29] are some recent examples in this direction.”
Hierarchical Edge Caching in Device-to-Device Aided Mobile Networks: Modeling, Optimization, and Design (2018, background): “Bastug et al. [25], Yang et al. [26], Jiang et al. [27], Xu and Tao [28], and Wen et al. [29] focused on hierarchical BS caching in heterogeneous networks (HetNets), but did not consider the edge caching in mobile devices, mobile users’ social behavior and preference as well as the diversity of…”