Proportional Fair-Based Joint Optimization of Cell Association and Inter-Cell Interference Coordination for Heterogeneous Networks

Ikeda, Yoshitaka; Okasaka, Shozo; Hoshino, Masayuki; Higuchi, Kenichi

doi:10.1109/vtcfall.2014.6966138

Cited by 6 publications

(6 citation statements)

References 10 publications

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“…During PR-ABS, the center UEs served by PS-LTE eNBs will also be scheduled when FeICIC is considered. Many researches have been done on eICIC and FeICIC [15][16][17][18][19][20], some preferring to schedule both CRE UEs and center UEs of small cells during ABSs/PR-ABSs, while the rest assume that only the CRE UEs are scheduled. According to reference [19], to avoid inefficient utilization of resources during ABS and to achieve better fairness, proportional fair (PF) scheduling is better used for both UEs during ABSs/PR-ABSs.…”

Section: Eicic/feicic Schemes Between Ps-lte and Lte-r Enbs 421 Eicmentioning

confidence: 99%

Co-channel interference management using eICIC/FeICIC with coordinated scheduling for the coexistence of PS-LTE and LTE-R networks

Chen

Ahmad

Chang

2017

J Wireless Com Network

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In the Republic of Korea, a Long Term Evolution (LTE)-based public safety (PS)-LTE network is being built using 718~728 MHz for uplink and 773~783 MHz for downlink. However, the same bands are also assigned to the LTE-based high-speed railway (LTE-R) network, so great concerns and practical researches on co-channel interference (CCI) management schemes are urgently required. In this paper, performance is analyzed and evaluated by considering the cases of non-RAN (radio access network) sharing and LTE-R RAN sharing by PS-LTE user equipments (UE). Since a train control signal requires high reliability and low latency in order to fulfill its mission-critical service (MCS) requirements, we give higher priority to LTE-R UE during resource allocation under the LTE-R RAN sharing by PS-LTE UEs. In addition, interference management schemes are more effective for the coexistence of PS-LTE and LTE-R networks under RAN sharing environment. In this paper, we utilize enhanced inter-cell interference coordination (eICIC) and further enhanced ICIC (FeICIC) schemes to mitigate the interference from PS-LTE network to LTE-R network while improving the LTE-R eNodeB (eNB) resource utilization by offloading more PS-LTE UEs to LTE-R network. Moreover, a coordinated multipoint (CoMP) transmission scheme is considered among LTE-R eNBs to enhance LTE-R cell edge user performance. By employing FeICIC along with coordinated scheduling (CS) CoMP, the best throughput performance can be achieved under the case of RAN sharing.

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Section: Eicic/feicic Schemes Between Ps-lte and Lte-r Enbs 421 Eicmentioning

confidence: 99%

Co-channel interference management using eICIC/FeICIC with coordinated scheduling for the coexistence of PS-LTE and LTE-R networks

Chen

Ahmad

Chang

2017

J Wireless Com Network

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“…The first term is an assignment cost with respect to user spectral efficiency, and the second term is a penalty term with respect to BS loads. The solution is obtained by solving the following optimization problem [13,14,17,[20][21][22]:…”

Section: Problem Formulationmentioning

confidence: 99%

“…We can now rewrite (21) into a set function form. Let V ∈ G and , (V) = + log( ) − log( ); we have the following proposition.…”

Section: Proposition 5 the Optimization Problem (15) Is Equivalent Tomentioning

confidence: 99%

“…Proposition 7. Let G be the solution obtained via the greedy algorithm and G * be the optimal set for the submodular optimization problem (21). Let (⋅) be the objective submodular function of (21).…”

Section: The Greedy Algorithm With Lazy Evaluationsmentioning

confidence: 99%

“…To alleviate the QoS degradation for offloaded users, cell association can be studied alongside other techniques such as power control and intercell interference coordination (ICIC) using Almost Blank Subframes (ABS) [19][20][21]. For example, enhanced ICIC (eICIC) is usually used in combination with CRE to help offloading traffic to small cells and reduce interference for offload users.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Submodular Optimization Framework for Outage-Aware Cell Association in Heterogeneous Cellular Networks

Chen²,

Lin³

et al. 2016

Mathematical Problems in Engineering

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In cellular heterogeneous networks (HetNets), offloading users to small cell base stations (SBSs) leads to a degradation in signal to interference plus noise ratio (SINR) and results in high outage probabilities for offloaded users. In this paper, we propose a novel framework to solve the cell association problem with the intention of improving user outage performance while achieving load balancing across different tiers of BSs. We formulate a combinatorial utility maximization problem with weighted BS loads that achieves proportional fairness among users and also takes into account user outage performance. A formulation of the weighting parameters is proposed to discourage assigning users to BSs with high outage probabilities. In addition, we show that the combinatorial optimization problem can be reformulated as a monotone submodular maximization problem and it can be readily solved via a greedy algorithm with lazy evaluations. The obtained solution offers a constant performance guarantee to the cell association problem. Simulation results show that our proposed approach leads to over 30% reduction in outage probabilities for offloaded users and achieves load balancing across macrocell and small cell BSs.

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Decentralized user association for (p, α)-proportional fair-based system throughput maximization in cellular networks

Takumi

Yuda

Hoshino

et al. 2015

2015 International Symposium on Wireless Communication Systems (ISWCS)

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Proportional Fair-Based Joint Optimization of Cell Association and Inter-Cell Interference Coordination for Heterogeneous Networks

Cited by 6 publications

References 10 publications

Co-channel interference management using eICIC/FeICIC with coordinated scheduling for the coexistence of PS-LTE and LTE-R networks

Co-channel interference management using eICIC/FeICIC with coordinated scheduling for the coexistence of PS-LTE and LTE-R networks

A Submodular Optimization Framework for Outage-Aware Cell Association in Heterogeneous Cellular Networks

Decentralized user association for (p, α)-proportional fair-based system throughput maximization in cellular networks

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