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Cell Selection Game for Densely-Deployed Sensor and Mobile Devices In 5G Networks Integrating Heterogeneous Cells and
Lusheng Wang1, Yamei Wang2, Zhizhong Ding3
1School of Computer and Information, Hefei University of Technology, Anhui 230009, China. wanglusheng@hfut.edu.cn.
Sensors (Basel, Switzerland)
|September 23, 2015
Summary
In heterogeneous cellular networks (HCNs), devices choose cells, creating games. Severe inter-cell interference (ICI) can cause devices to switch from picocells to macrocells, collapsing pure strategy Nash equilibria (PSNE).
Area of Science:
- Wireless networking
- Telecommunications engineering
- Game theory in networks
Background:
- Integration of Internet of Things (IoT) and heterogeneous cellular networks (HCNs) is key for 5G.
- Hyper-dense device deployment leads to cell selection (CS) games.
- Overlapping cell coverage causes inter-cell interference (ICI).
Purpose of the Study:
- To analyze the cell selection game in a two-tier HCN with densely deployed devices.
- To investigate the impact of inter-cell interference (ICI) on device cell selection.
- To theoretically identify pure strategy Nash equilibria (PSNE) and their boundaries.
Main Methods:
- Modeling the cell selection as a congestion game with inter-cell interference (CGI) and capacity (CGC).
- Theoretical analysis to find circular boundaries for macrocell and picocell selection, indicating PSNE.
- Simulations with varying picocell radii and path loss exponents to study ICI impact.
Main Results:
- Theoretical identification of circular boundaries defining pure strategy Nash equilibria (PSNE) in cell selection games.
- Simulation results reveal a collapse of PSNE under severe ICI, where devices shift from picocells to macrocells.
- Identification of specific collapse points influenced by picocell radius and path loss exponent.
Conclusions:
- Inter-cell interference (ICI) significantly destabilizes pure strategy Nash equilibria (PSNE) in heterogeneous cellular networks (HCNs).
- A critical level of ICI can lead to a widespread shift in device preferences from picocells to macrocells.
- Understanding these collapse points is crucial for managing device behavior and network performance in dense HCN deployments.
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