Journal ArticleDOI
Iterative Multi-Level Soft Frequency Reuse With Load Balancing for Heterogeneous LTE-A Systems
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TLDR
The novel multi-level soft frequency reuse (MSFR) scheme, where the users in three different regions of a macro/micro cell adopt distinct frequency segments and different transmission power levels, is proposed.Abstract:
This paper deals with the planning of two-layer long-term evolution-advanced cellular systems, taking both the co-tier and cross-tier interference into account. In particular, we propose the novel multi-level soft frequency reuse (MSFR) scheme, where the users in three different regions of a macro/micro cell adopt distinct frequency segments and different transmission power levels. The optimization of power control parameters and cell association with MSFR results in a non-convex problem. We present the iterative-MSFR (I-MSFR) scheme, where the main optimization problem is divided into two sub-problems that can be subsequently solved by means of classical optimization methods. Finally, we propose two simplified schemes that achieve a comparable performance as I-MSFR in terms of utility, cell capacity, and outage conditions. I-MSFR and the simplified schemes have shown better performance than other schemes in the literature.read more
Citations
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Journal ArticleDOI
Energy efficiency techniques in ultra-dense wireless heterogeneous networks: An overview and outlook
Olumide Alamu,Abiodun Gbenga-Ilori,Michael Adedosu Adelabu,Agbotiname Lucky Imoize,Oluwabusayo Ladipo +4 more
TL;DR: The peculiarities that make energy consumption one of the challenging problems in wireless communication networks are identified and EE metrics used to gauge energy consumption rate and performance trade-off are presented.
Proceedings ArticleDOI
Towards Energy-Fairness in LoRa Networks
TL;DR: A LoRa network model to study the energy consumption of all the end devices in a network by considering the unique features of LoRa networks, such as LoRaWAN MAC protocol, spreading factors, interference, and the capacity limitation of a LoRa gateway is developed.
Journal ArticleDOI
Game-Theoretic Power Control Mechanisms for Device-to-Device Communications Underlaying Cellular System
TL;DR: This paper proposes a game-theoretic model for the compensation power acquisition of D2D link transmitters underlaying cellular system that considers not only the interference between cellular links and D 2D links but the interference among D1D links themselves as well.
Proceedings ArticleDOI
AdapLoRa: Resource Adaptation for Maximizing Network Lifetime in LoRa networks
TL;DR: AdapLoRa is developed, a lifetime-aware dynamic network resource allocation system that periodically adapts the resource allocation according to the link quality of end devices and improves the network lifetime of LoRa networks.
Journal ArticleDOI
Analytical Network-Wide Optimization of CoMP-Aided MIMO-OFDMA Irregular Networks With Frequency Reuse: A Multiobjective Approach
TL;DR: A novel analytical framework is introduced that, for a specific set of SFR parameters, allows the computation of closed-form approximations to relevant performance metrics such as average total capacity, worst-users rate, and backhaul requirements, hence allowing the optimization of the SFR-related parameters based on the proposed analytical expressions.
References
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Book
Convex Optimization
Stephen Boyd,Lieven Vandenberghe +1 more
TL;DR: In this article, the focus is on recognizing convex optimization problems and then finding the most appropriate technique for solving them, and a comprehensive introduction to the subject is given. But the focus of this book is not on the optimization problem itself, but on the problem of finding the appropriate technique to solve it.
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TL;DR: The updated new edition of the classic Introduction to Algorithms is intended primarily for use in undergraduate or graduate courses in algorithms or data structures and presents a rich variety of algorithms and covers them in considerable depth while making their design and analysis accessible to all levels of readers.
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Introduction to Algorithms, third edition
TL;DR: Pseudo-code explanation of the algorithms coupled with proof of their accuracy makes this book a great resource on the basic tools used to analyze the performance of algorithms.
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.