Energy Efficiency Analysis of Cache-Enabled Two-Tier HetNets Under Different Spectrum Deployment Strategies | Zendy

Zhi Yan | Zendy; Shuang Chen | Zendy; Yangbo Ou | Zendy; Hongli Liu | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Energy Efficiency Analysis of Cache-Enabled Two-Tier HetNets Under Different Spectrum Deployment Strategies

Author(s) -

Zhi Yan,

Shuang Chen,

Yangbo Ou,

Hongli Liu

Publication year - 2017

Publication title -

ieee access

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.587

H-Index - 127

ISSN - 2169-3536

DOI - 10.1109/access.2017.2670598

Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation

Heterogeneous networks (HetNets) consisting of macrocells overlaid with small cells (e.g. femtocell, picocell, microcell, and relay) are conceived as an appealing technology to cope with the explosive growth of service traffic in future cellular networks. However, the backhaul limitation has become a bottleneck in HetNets, which affects the network performance and users' quality of experience. Wireless edge caching that caches popular contents at the network edge (e.g., base stations (BSs)) can effectively unblock the bottleneck and further unleash the potential of HetNets. In this paper, considering a cache-enabled two-tier HetNet, we resort to the stochastic geometry theory to model and analyze the energy efficiency performance of the HetNet with closed-access policy under cochannel and orthogonal channel deployment scenarios. Specifically, the exact closed-form expressions of outage probability, throughput and energy efficiency are derived, respectively. Numerical results show that the larger small-cell local cache capability may not always lead to higher network energy efficiency due to the caching power cost. The results also show that with a given cache capacity for small cells, there exists an optimal small BS density that maximizes the network energy efficiency.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research