Multi-Operator Cooperation for Green Cellular Networks with Spatially Separated Base Stations under Dynamic User Associations

Md Farhad Hossain, Kumudu S. Munasinghe, Abbas Jamalipour

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Abstract

This paper presents a cooperation framework for sharing base stations (BSS) among N number of collocated radio-Access networks (RANs) for improving energy efficiency (EE). The proposed framework is equally applicable for collocated and non-collocated BSS belonging to multiple RANs. To the best of our knowledge, this paper is the first for developing such cooperation mechanisms among the spatially separated BSS of N RANs. Independent hard-core Poisson point process (PPP) is used for modeling the locations of BSS with a minimal inter-BS distance, while locations of user equipment devices (UEs) are modeled using PPP. The proposed cooperation mechanisms enable the networks to serve UEs of other RANs allowing some BSS to switch into sleep mode for better EE. Call continuity, signal quality and call blocking limits are guaranteed during this dynamic BS switching. For avoiding high complexity of the generalized EE optimization problem, heuristically guided algorithms with different dynamic UE association policies are proposed. Network performance including fairness of the proposed cooperation under a wide range of system settings is thoroughly investigated. Simulation results clearly demonstrate a substantial improvement in EE as well as an extremely fair cooperation. Comparisons with the other works further validate the proposed framework.

Original languageEnglish
Pages (from-to)93-107
Number of pages15
JournalIEEE Transactions on Green Communications and Networking
Volume3
Issue number1
DOIs
Publication statusPublished - Mar 2019

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Base stations
Energy efficiency
Network performance
Switches

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title = "Multi-Operator Cooperation for Green Cellular Networks with Spatially Separated Base Stations under Dynamic User Associations",
abstract = "This paper presents a cooperation framework for sharing base stations (BSS) among N number of collocated radio-Access networks (RANs) for improving energy efficiency (EE). The proposed framework is equally applicable for collocated and non-collocated BSS belonging to multiple RANs. To the best of our knowledge, this paper is the first for developing such cooperation mechanisms among the spatially separated BSS of N RANs. Independent hard-core Poisson point process (PPP) is used for modeling the locations of BSS with a minimal inter-BS distance, while locations of user equipment devices (UEs) are modeled using PPP. The proposed cooperation mechanisms enable the networks to serve UEs of other RANs allowing some BSS to switch into sleep mode for better EE. Call continuity, signal quality and call blocking limits are guaranteed during this dynamic BS switching. For avoiding high complexity of the generalized EE optimization problem, heuristically guided algorithms with different dynamic UE association policies are proposed. Network performance including fairness of the proposed cooperation under a wide range of system settings is thoroughly investigated. Simulation results clearly demonstrate a substantial improvement in EE as well as an extremely fair cooperation. Comparisons with the other works further validate the proposed framework.",
keywords = "BS switching, fairness, green cellular networks, Multi-operator cooperation, user association",
author = "Hossain, {Md Farhad} and Munasinghe, {Kumudu S.} and Abbas Jamalipour",
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AU - Jamalipour, Abbas

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AB - This paper presents a cooperation framework for sharing base stations (BSS) among N number of collocated radio-Access networks (RANs) for improving energy efficiency (EE). The proposed framework is equally applicable for collocated and non-collocated BSS belonging to multiple RANs. To the best of our knowledge, this paper is the first for developing such cooperation mechanisms among the spatially separated BSS of N RANs. Independent hard-core Poisson point process (PPP) is used for modeling the locations of BSS with a minimal inter-BS distance, while locations of user equipment devices (UEs) are modeled using PPP. The proposed cooperation mechanisms enable the networks to serve UEs of other RANs allowing some BSS to switch into sleep mode for better EE. Call continuity, signal quality and call blocking limits are guaranteed during this dynamic BS switching. For avoiding high complexity of the generalized EE optimization problem, heuristically guided algorithms with different dynamic UE association policies are proposed. Network performance including fairness of the proposed cooperation under a wide range of system settings is thoroughly investigated. Simulation results clearly demonstrate a substantial improvement in EE as well as an extremely fair cooperation. Comparisons with the other works further validate the proposed framework.

KW - BS switching

KW - fairness

KW - green cellular networks

KW - Multi-operator cooperation

KW - user association

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