Dynamic user association and eICIC management in heterogeneous cellular networks

Choi, Jeongsik; Lee, Woonghee; Kim, Youngjoon; Kim, Seong-Cheol

doi:10.1109/icc.2016.7511122

Cited by 11 publications

(8 citation statements)

References 11 publications

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“…Refs. [80][81][82][83][84][85] study the user association and ABS ratio optimization jointly to achieve the best system utility: minimizing the outage probability [81], maximizing the system PF throughput [80,82,83,85], and maximizing the system max-min weighted throughput [84]. However, the joint optimization problem is nonconvex and NP-hard with 0-1 association and continuous ABS ratio optimization variables.…”

Section: Joint Eicic Designsmentioning

confidence: 99%

Time-domain ICIC and optimized designs for 5G and beyond: a survey

Liu

Zhou

Vasilakos

et al. 2018

Sci. China Inf. Sci.

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Time-domain enhanced inter-cell interference coordination (eICIC) is an effective technique to reduce the cross-tier inter-cell interference (ICI) in long term evolution (LTE)-based heterogeneous small cell networks (HetSCNs). This paper first clarifies two main communication scenarios in HetSCNs, i.e., macrocells deployed with femtocells (macro-femto) and with picocells (macro-pico). Then, the main challenges in HetSCNs, particularly the severe cross-tier ICI in macro-femto caused by femtocells with closed subscribe group (CSG) access or in macro-pico caused by picocells with range expansion are analyzed. Based on the prominent feature of dominant interference in HetSCNs, the main idea of time-domain interference coordination and two basic schemes in the eICIC standardization, i.e., almost blank subframe (ABS) and orthogonal frequency division multiplexing symbol shift are presented, with a systematic introduction to the interactions of these techniques with other network functions. Then, given macro-femto and macro-pico HetSCNs, an overview is provided on the advanced designs of ABS-based eICIC, including self-optimized designs with regard to key parameters such as ABS muting ratio, and joint optimized designs of ABS-based eICIC and other radio resource management techniques, such as user association and power control. Finally, the open issues and future research directions are discussed.

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Section: Joint Eicic Designsmentioning

confidence: 99%

Time-domain ICIC and optimized designs for 5G and beyond: a survey

Liu

Zhou

Vasilakos

et al. 2018

Sci. China Inf. Sci.

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“…7 In two-tier HetNets, ABS refers to the practice of muting some subframes of the interferer tier and providing these interference-free subframes to the tier with vulnerable users. [8][9][10][11] On the other hand, ABS schemes can also be adopted by SBSs to alleviate the interference to MUs, [12][13][14][15][16] especially in closed subscriber group (CSG) mode. ABS schemes could be implemented by macrocell base stations (MBSs) jointly with user association to offload macrocell users (MUs) to small cells (e.g., open access picocells).…”

Section: Introductionmentioning

confidence: 99%

“…ABS schemes could be implemented by macrocell base stations (MBSs) jointly with user association to offload macrocell users (MUs) to small cells (e.g., open access picocells). [8][9][10][11] On the other hand, ABS schemes can also be adopted by SBSs to alleviate the interference to MUs, [12][13][14][15][16] especially in closed subscriber group (CSG) mode.…”

Section: Introductionmentioning

confidence: 99%

“…Generally, joint ABS at MBSs and user association can be formulated as mixed integer utility maximization problems with different considerations, eg, time-varying characteristics of channels, 8 network topology and traffic load, 9 max-min fairness, 10 and biasing factor optimization. 11 In contrast, to avoid the interference to MUs, the design of ABS schemes at SBSs are more complicated.…”

Section: Introductionmentioning

confidence: 99%

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Pricing framework for almost blank subframe scheme in two‐tier heterogeneous networks

Zhou

et al. 2017

Int J Communication

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As a part of enhanced inter-cell interference coordination (eICIC), almost blank subframe (ABS) is an efficient technique to mitigate the cross-tier interference of two-tier heterogeneous networks (HetNets) and enhance overall network performance. However, in small cells with closed subscriber group (CSG) mode, how to motivate small cell base stations (SBSs) to adopt ABS schemes is still one of technical challenges due to the selfish nature of SBSs. In this paper, we propose a pricing framework with ABS scheme that benefit both the macrocell and small cell tier. Within the proposed framework, each SBS with closed access policy performs ABS scheme by muting a portion of the whole frame in time domain, and then dedicating this interference-free subframe to macrocell users (MUs) for exclusive use. In return, the macrocell base station (MBS) announces the price for these ABSs and offers a certain amount of revenue to each SBS according to the length of its ABS. Furthermore, we extend the small cell performance analysis to the scenario of hybrid access policy, which allow neighboring MUs to access small cells. To investigate the interaction between two tiers, we formulate the proposed framework as a one-leader multiple-follower Stackelberg game, which regards the MBS and SBSs as leader and followers, respectively. On the basis of the theoretical analysis, we prove that a unique Stackelberg equilibrium (SE) exists and obtain the optimal strategies for both tiers. Numerical results evaluate the utility performance of both tiers when SE is achieved and verify the validity of the proposed framework.

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“…In [42], both non-line of sight (NLOS) and line of sight (LOS) transmission is incorporate for analyzing performance of a HetCN by considering a user receiving high SINR from the BS. Authors in [43], incorporates both user association and enhanced Inter-Cell Interference Coordination (eICIC) management problems, and proposed a potential user association scheme that forward congested BSs users to adjacent BSs regardless of type. In [44], the Soft Frequency Reuse (SFR) performance with asymmetrical cell patterns in a realistic environment is presented, and provides an approach for efficient utilization of SFR in large networks with irregular cell patterns.…”

Section: Heterogeneous Cellular Network (Hetcns)mentioning

confidence: 99%