Journal ArticleDOI
Interference coordination and cancellation for 4G networks
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TLDR
Viable approaches include the use of power control, opportunistic spectrum access, intra and inter-base station interference cancellation, adaptive fractional frequency reuse, spatial antenna techniques such as MIMO and SDMA, and adaptive beamforming, as well as recent innovations in decoding algorithms.Abstract:
This article provides an overview of contemporary and forward looking inter-cell interference coordination techniques for 4G OFDM systems with a specific emphasis on implementations for LTE. Viable approaches include the use of power control, opportunistic spectrum access, intra and inter-base station interference cancellation, adaptive fractional frequency reuse, spatial antenna techniques such as MIMO and SDMA, and adaptive beamforming, as well as recent innovations in decoding algorithms. The applicability, complexity, and performance gains possible with each of these techniques based on simulations and empirical measurements will be highlighted for specific cellular topologies relevant to LTE macro, pico, and femto deployments for both standalone and overlay networks.read more
Citations
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A Tractable Approach to Coverage and Rate in Cellular Networks
TL;DR: The proposed model is pessimistic (a lower bound on coverage) whereas the grid model is optimistic, and that both are about equally accurate, and the proposed model may better capture the increasingly opportunistic and dense placement of base stations in future networks.
Journal ArticleDOI
A survey on 3GPP heterogeneous networks
Aleksander Damnjanovic,J. Montojo,Yongbin Wei,Ji Tingfang,Tao Luo,Madhavan Srinivasan Vajapeyam,Taesang Yoo,Osok Song,Durga Prasad Malladi +8 more
TL;DR: The need for an alternative strategy, where low power nodes are overlaid within a macro network, creating what is referred to as a heterogeneous network is discussed, and a high-level overview of the 3GPP LTE air interface, network nodes, and spectrum allocation options is provided, along with the enabling mechanisms.
Journal ArticleDOI
Femtocells: Past, Present, and Future
TL;DR: This tutorial article overviews the history of femtocells, demystifies their key aspects, and provides a preview of the next few years, which the authors believe will see a rapid acceleration towards small cell technology.
Journal ArticleDOI
Heterogeneous cellular networks: From theory to practice
Amitava Ghosh,Nitin Mangalvedhe,Rapeepat Ratasuk,Bishwarup Mondal,Mark Cudak,Eugene Visotsky,T. A. Thomas,Jeffrey G. Andrews,Ping Xia,Han-Shin Jo,Harpreet S. Dhillon,Thomas David Novlan +11 more
TL;DR: New theoretical models for understanding the heterogeneous cellular networks of tomorrow are discussed, and the practical constraints and challenges that operators must tackle in order for these networks to reach their potential are discussed.
Journal ArticleDOI
Achieving "Massive MIMO" Spectral Efficiency with a Not-so-Large Number of Antennas
TL;DR: This paper proposes an improved Network-MIMO TDD architecture achieving spectral efficiencies comparable with "Massive MIMO", with one order of magnitude fewer antennas per active user per cell (roughly, from 500 to 50 antennas).
References
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Journal ArticleDOI
Overcoming interference in spatial multiplexing MIMO cellular networks
TL;DR: It is argued that many of the traditional interference management techniques have limited usefulness when viewed in concert with MIMO, and emerging system-level interference-reducing strategies based on cooperation will be important for overcoming interference in future spatial multiplexing cellular systems.
Proceedings ArticleDOI
Performance of Uplink Fractional Power Control in UTRAN LTE
C.U. Castellanos,D.L. Villa,Claudio Rosa,Klaus I. Pedersen,Francesco Calabrese,Per Henrik Michaelsen,Juergen Michel +6 more
TL;DR: This paper evaluates in detail the impact of a FPC scheme on the SINR and interference distributions in order to provide a sub-optimal configuration tuned for both interference- and noise-limited scenarios.
Journal ArticleDOI
Performance evaluation of frequency planning schemes in OFDMA-based networks
TL;DR: The results show that the partial isolation scheme outperforms all the others, especially in the downlink, as it combines the advantage of the reuse 1 scheme (large overall throughput) with that of the mix of reuses 1 and 3 (good cell-edge performance).
Journal ArticleDOI
Opportunistic Beamforming and Scheduling for OFDMA Systems
TL;DR: The issue of fairness and quality-of-service (QoS) in opportunistic systems by proposing a modified proportional fair (PF) scheduler for OFDMA was able to give users different QoS, based on their requirements, while still exploiting multiuser diversity.
Proceedings ArticleDOI
Frequency Reuse and Intercell Interference Co-Ordination In E-UTRA
TL;DR: Intercell interference co-ordination is considered within 3GPP for evolved UTRA (E-UTRA) to improve coverage and increase cell-edge bitrate and in this study some basic schemes have been evaluated by means of simulations.