Journal ArticleDOI
Capacity and Fairness Analysis of Heterogeneous Networks with Range Expansion and Interference Coordination
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TLDR
Off-loading benefits of range expansion in HetNets are captured through cumulative distribution functions (CDFs) of the downlink signal to interference plus noise ratio (SINR) difference between the macrocell and strongest picocell signals to investigate the system capacity and fairness.Abstract:
Range expansion and inter-cell interference coordination (ICIC) can improve the capacity and fairness of heterogeneous network (HetNet) deployments by off-loading macrocell users to low-power nodes. Due to difficulties in analytical treatment, current studies for range expansion and ICIC in HetNets rely mostly on simulations. In this letter, first, off-loading benefits of range expansion in HetNets are captured through cumulative distribution functions (CDFs) of the downlink signal to interference plus noise ratio (SINR) difference between the macrocell and strongest picocell signals. Then, these CDFs are used to investigate the system capacity and fairness as a continuous function of the range expansion bias, and benefits of using ICIC with range expansion are demonstrated through numerical results.read more
Citations
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Journal ArticleDOI
Evolution Towards 5G Multi-tier Cellular Wireless Networks: An Interference Management Perspective
TL;DR: It is argued that the existing interference management schemes will not be able to address the interference management problem in prioritized 5G multi-tier networks where users in different tiers have different priorities for channel access.
Journal ArticleDOI
Evolution Towards 5G Multi-tier Cellular Wireless Networks: An Interference Management Perspective
TL;DR: In this paper, a survey and qualitative comparison of the existing cell association and power control schemes is provided to demonstrate their limitations for interference management in 5G networks with shared spectrum access (i.e., when the different network tiers share the same licensed spectrum).
Journal ArticleDOI
Towards 1 Gbps/UE in Cellular Systems: Understanding Ultra-Dense Small Cell Deployments
TL;DR: In this paper, the potential gains and limitations of network densification and spectral efficiency enhancement techniques in ultra-dense small cell deployments are analyzed. And the top ten challenges to be addressed to bring ultra dense small-cell deployments to reality are discussed.
Journal ArticleDOI
User Association in 5G Networks: A Survey and an Outlook
TL;DR: A taxonomy is introduced as a framework for systematically studying the existing user association algorithms conceived for HetNets, massive MIMO, mmWave, and energy harvesting networks and provides design guidelines and potential solutions for sophisticated user association mechanisms.
Journal ArticleDOI
Joint Resource Partitioning and Offloading in Heterogeneous Cellular Networks
TL;DR: It is shown that load balancing is insufficient, and resource partitioning is required in conjunction with offloading to improve the rate of cell edge users in co-channel heterogeneous networks.
References
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Proceedings ArticleDOI
Pico Cell Range Expansion with Interference Mitigation toward LTE-Advanced Heterogeneous Networks
TL;DR: This paper investigates performance of CRE with various bias settings and shows that a moderate bias setting is effective to enhance capacity and user throughput and proposes to support coordination of Lightly Loaded CCH transmission Subframe (LLCS) in LTE-Advanced.
Journal ArticleDOI
Resource Allocation for Downlink Cellular OFDMA Systems—Part I: Optimal Allocation
TL;DR: The optimal resource allocation turns out to be ¿binary¿ in the sense that, except for at most one pivot-user in each cell, any user receives data either in the reused bandwidth or in the protected bandwidth, but not in both.
Proceedings ArticleDOI
Downlink FTP Performance of Heterogeneous Networks for LTE-Advanced
Madhavan Srinivasan Vajapeyam,Aleksandar Damnjanovic,Juan Montojo,Tingfang Ji,Yongbin Wei,Durga Prasad Malladi +5 more
TL;DR: System simulations results for an FTP traffic model indicate that, for a pico cell deployment with density of 4 picos per macro cell, 40% or more performance gain can be achieved when techniques enabling cell range expansion are deployed.
Proceedings ArticleDOI
Cell Selection with Downlink Resource Partitioning in Heterogeneous Networks
TL;DR: Simulation results demonstrate that with four small cells deployed per sector, 5%-ile and 50%-ile user throughputs both improve by ~150% relative to the same case without resource partitioning.