A Novel Multiobjective Cell Switch-Off Framework for Cellular Networks

IEEE Access

Mario Garcia-Lozano¹  Halim Yanikomeroglu²  David G. Gonzalez³  Jyri Hamalainen³  Gamini Senarath⁴ 

[1] Department of Signal Theory and Communications, Universitat Polit&x00E8;Department of Systems and Computer Engineering, Carleton University, Ottawa, ON, Canada;School of Electrical Engineering at Aalto University, Espoo, Finland;cnica de Catalunya, Barcelona;

关键词: Cellular networks;    energy efficiency;    cell switch-off;    CSO;    multiobjective optimization;    Pareto efficiency;   

DOI  :  10.1109/ACCESS.2016.2625743

来源: DOAJ

【 摘 要 】

Cell switch-off (CSO) is recognized as a promising approach to reduce the energy consumption in the next-generation cellular networks. However, CSO poses serious challenges not only from the resource allocation perspective but also from the implementation point of view. Indeed, CSO represents a difficult optimization problem due to its NP-complete nature. Moreover, there are a number of important practical limitations in the implementation of CSO schemes, such as the need for minimizing the real-time complexity and the number of on-off/off-on transitions and CSO-induced handovers. This paper introduces a novel approach to CSO based on multiobjective optimization that makes use of the statistical description of the service demand (known by operators). In addition, downlink and uplink coverage criteria are included and a comparative analysis between different models to characterize intercell interference is also presented to shed light on their impact on CSO. The framework distinguishes itself from other proposals in two ways: 1) the number of on-off/off-on transitions as well as handovers are minimized and 2) the computationally-heavy part of the algorithm is executed offline, which makes its implementation feasible. The results show that the proposed scheme achieves substantial energy savings in small cell deployments, where service demand is not uniformly distributed, without compromising the quality-of-service or requiring heavy real-time processing.

【 授权许可】

Unknown