A universal frequency reuse scheme in LTE‐A heterogeneous networks. Issue 17 (9th September 2016)

• Record Type: Journal Article
• Authors: Li, Yibing; Niu, Chongyu; Ye, Fang; Hu, Rose Qingyang
• Is Part Of: Wireless communications and mobile computing. Volume 16:Issue 17(2016)
• Page Start: 2839
• Page End: 2851
• Publication Date: 2016-09-09
• Subjects: frequency reuse -- LTE‐A HetNets -- graph theory; Wireless communication systems -- Periodicals; Mobile communication systems -- Periodicals; 621.38205
• DOI: 10.1002/wcm.2731
• Languages: English
• ISSNs: 1530-8669

Abstract

Abstract: Effective inter‐cell interference mitigation has been extensively studied because of its outstanding cell‐edge signal quality improvement capability. Conventional static inter‐cell interference coordination strategies, including fractional frequency reuse and soft frequency reuse, have received much attention owing to their effectiveness in mitigating interference and low complexity in implementation. However, they are less effective when dealing with dense uneven traffic distributions and dynamic traffic demands and thus incur low spectrum utilization in some cells and spectrum shortage in others. This paper proposes a universal frequency reuse scheme in a two‐layer Long Term Evolution‐Advanced heterogeneous network to ensure good throughput for all user equipment (UE), especially UEs at cell edge. The proposed scheme allows each cell to use all the spectrum resources, limited by an orderly regulation of all sub‐bands. This scheme minimizes the potential occurrence probability of inter‐cell co‐sub‐band interference through an intra‐cell sub‐band resource management. Furthermore, a graph‐theoretic based sub‐band allocation algorithm is developed to optimize UE throughput performance, especially for the cell‐edge low signal to interference noise ratio UEs. A comprehensive performance comparison among different frequency reuse schemes is conducted by considering performance metrics, including cell‐edge throughput, average throughput, and signal to interference noise ratio cumulative distribution function. Simulation result shows that the universal frequency reuse scheme outperforms other two schemes significantly. Copyright © 2016 John Wiley & Sons, Ltd. Abstract : This paper proposes a universal frequency reuse scheme in a two‐layer LTE‐A heterogeneous network to ensure good throughput for all UEs, at cell edge. The propose scheme allows each cell to use all the spectrum resources, limited by an orderly regulation of all sub‐bands. Simulation result shows that the universal frequency reuse scheme outperforms fractional frequency reuse scheme and soft frequency reuse scheme significantly.