Self-Optimized Coverage Coordination in Femtocell Networks

Jo, Han-Shin; Mun, Cheol; Moon, June; Yook, Jong-Gwan

doi:10.1109/twc.2010.090210.081313

Cited by 95 publications

(55 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Jo et al [18] proposed a coverage coordination scheme equipped at low power BSs, each of which performs self-configuration and self-optimization of pilot transmit power based on the interference power perceived at the node. Quek et al [19] proposed an exclusive use of subchannel allocation with a fairness constraint between heterogeneous tiers in order to optimize overall energy efficiency, and the authors in [20] extended the work for optimized joint and disjoint subchannel allocation, which is shown to depend on relative BS densities and transmit powers.…”

mentioning

confidence: 99%

Energy-Efficient Repulsive Cell Activation for Heterogeneous Cellular Networks

Cho

Choi²

2013

IEEE J. Select. Areas Commun.

102

View full text Add to dashboard Cite

Abstract-In this paper, we consider a two-tier heterogeneous cellular network (HCN) where macrocells and distributed low power cells, namely daughtercells, are operated in a common spectrum. Due to the ad-hoc nature of daughtercell BS deployments such as pico and femto cells, the mutual interference varies and obviously the coverage probability behaves differently in terms of transmit powers and densities of macrocells and daughtercells. In this paper, we employ repulsive cell activation in the interfering daughtercell network and see the impact of a minimum separation distance between the daughtercell BSs in terms of coverage under open access and power efficiency. The control of the minimum separation distance plays a role in balancing cell load effectively according to changing user density and is justified for the coexistence of low power daughtercells. The optimal minimum separation distance in terms of user density and target per-tier user throughput requirements is found by a numerical search based on a simple bisection method. Numerical results show the benefit of cell repulsion in terms of increased user density support and less area power consumption.

show abstract

mentioning

confidence: 99%

Energy-Efficient Repulsive Cell Activation for Heterogeneous Cellular Networks

Cho

Choi²

2013

IEEE J. Select. Areas Commun.

102

View full text Add to dashboard Cite

show abstract

“…Self-organization of radio access networks is regarded as a new approach that enables cost-effective support of a range of high-quality mobile communication services and applications for acceptable prices. It enables deployment of dense femtocell clusters, providing advanced SON mechanisms [6,12,13] generally eliminating interference between femtocells, as well as reducing the size of the neighbor cell list and scanning for the handover to ensure fast and reliable handover.…”

Section: Network Architecture To Support Dense Femtocellsmentioning

confidence: 99%

“…The SON features [5,12,13] can support the coordination among the FAPs as well as among the FAPs and macrocellular BS to execute smooth handover.…”

Section: Introductionmentioning

confidence: 99%

Handover management in high-dense femtocellular networks

Chowdhury

2013

J Wireless Com Network

View full text Add to dashboard Cite

Femtocell technology is envisioned to be widely deployed in subscribers' homes to provide high data rate communications with quality of service. Dense deployment of femtocells will offload large amounts of traffic from the macrocellular network to the femtocellular network by the successful integration of macrocellular and femtocellular networks. Efficient handling of handover calls is the key for successful femtocell/macrocell integration. For dense femtocells, intelligent integrated femtocell/macrocell network architecture, a neighbor cell list with a minimum number of femtocells, effective call admission control (CAC), and handover processes with proper signaling are the open research issues. An appropriate traffic model for the integrated femtocell/macrocell network is also not yet developed. In this article, we present the major issues of mobility management for the integrated femtocell/macrocell network. We propose a novel algorithm to create a neighbor cell list with a minimum, but appropriate, number of cells for handover. We also propose detailed handover procedures and a novel traffic model for the integrated femtocell/macrocell network. The proposed CAC effectively handles various calls. The numerical and simulation results show the importance of the integrated femtocell/macrocell network and the performance improvement of the proposed schemes. Our proposed schemes for dense femtocells will be very effective for those in research and industry to implement.

show abstract

“…To that end, for treating femtocells' CM problem only, a large variety of dynamic cell sizing schemes have been developed towards improving overall system's capacity [3][4][5][6][7][8][9][10], when compared to that of fixed cell sizing schemes. This is achieved by the dynamic adaptation of femtocells' maximum transmission power [3][4][5] or pilot signal power [7][8][9] in a step-wise heuristic manner, while aiming at one of the following goals: (a) assure an upper bound on femtocell user's SINR [3], (b) minimize femtocells' coverage leakage probability (i.e., the probability that a femtocell user's SINR is larger than a threshold, towards minimizing femtocells' coverage area leak into an outdoor macrocell) [5], (c) minimize the amount of handovers between the two tiers [7], or (d) minimize power consumption [9].…”

Section: Limitations Of Existing Literature Workmentioning

confidence: 99%

Optimal power control and coverage management in two-tier femtocell networks

Aristomenopoulos

Kastrinogiannis

Stamatina

et al. 2012

J Wireless Com Network

View full text Add to dashboard Cite

In this article, we jointly consider the problem of efficient power control and coverage (PCC) management over an integrated two-tier macrocell/femtocell network towards maximizing the expected throughput of the system subject to appropriate power constraints, under the existence of both co-tier and cross-tier interferences. Optimal network design amounts to joint optimization of users' allocated power levels and cell's maximum aggregated downlink transmitted power, i.e., coverage area management. This problem is inherently difficult because it is in fact a non-convex optimization problem. A novel approach to address the latter is performed that entails a suitable transformation, which allows the use of convex optimization and also forms the basis for the design of a distributed PCC algorithm via performing two-level primal-dual decomposition. PCC algorithm's convergence to optimality is established. We demonstrate that for realistic macrocell/femtocell deployment scenarios, overall system throughput increase up to approximately 50% can be achieved while guaranteeing 70% of power savings.

show abstract

Self-Optimized Coverage Coordination in Femtocell Networks

Cited by 95 publications

References 15 publications

Energy-Efficient Repulsive Cell Activation for Heterogeneous Cellular Networks

Energy-Efficient Repulsive Cell Activation for Heterogeneous Cellular Networks

Handover management in high-dense femtocellular networks

Optimal power control and coverage management in two-tier femtocell networks

Contact Info

Product

Resources

About