5G – Wireless Communications for 2020

Barreto, André Noll; Faria, Bruno; Almeida, Erika P. L.; Rodríguez, Inés González; Lauridsen, Mads; Amorim, Rafhael; Vieira, Robson D.

doi:10.14209/jcis.2016.14

Cited by 27 publications

(37 citation statements)

References 68 publications

(78 reference statements)

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“…Higher data rates and smaller battery consumption can be achieved using short distances in the small cell [69]. Solving the capacity and data rate challenge with network densification could be very expensive in terms of equipment, maintenance, and operations [200].…”

Section: Access Architecture Related Radio Technologymentioning

confidence: 99%

“…Moving networks (MN) are the combination of multi-hop and vehicular communications concepts [69,71]. The MN deploys one or several moving relay node(s) (MRNs) [175,176,251] on vehicles that form their own cell(s) inside the vehicle to serve vehicular users [72].…”

Section: Access Architecture Related Radio Technologymentioning

confidence: 99%

“…Challenges in using MRN are efficient backhauling, design of efficient resource allocation and interference management techniques, as well as mobility management schemes to exploit the benefit of group handovers for vehicular user equipment (UE) devices served by the same MRN [72]. The main research challenges related to MN concept are associated with complexity management due to the mobility of access points and providing a high-rate wireless backhaul link from the moving cell to the fixed network [69].…”

Section: Access Architecture Related Radio Technologymentioning

confidence: 99%

“…In UDN except mmWave, new approaches are needed, e.g., interface aware routing and intelligent resource allocation [9], as these links may occupy part of the spectrum used in the access network [73]. Latency and reliability of this link are important issues to be considered being prone to blocking and fading [69]. In any case, further research is necessary to explore TDD multi-flow coordination schemes to avoid bottlenecks in the downlink backhaul [9].…”

Section: Access Architecture Related Radio Technologymentioning

confidence: 99%

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IoT’s Tiny Steps towards 5G: Telco’s Perspective

Cero¹,

Husić

Baraković

2017

Symmetry

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Abstract:The numerous and diverse applications of the Internet of Things (IoT) have the potential to change all areas of daily life of individuals, businesses, and society as a whole. The vision of a pervasive IoT spans a wide range of application domains and addresses the enabling technologies needed to meet the performance requirements of various IoT applications. In order to accomplish this vision, this paper aims to provide an analysis of literature in order to propose a new classification of IoT applications, specify and prioritize performance requirements of such IoT application classes, and give an insight into state-of-the-art technologies used to meet these requirements, all from telco's perspective. A deep and comprehensive understanding of the scope and classification of IoT applications is an essential precondition for determining their performance requirements with the overall goal of defining the enabling technologies towards fifth generation (5G) networks, while avoiding over-specification and high costs. Given the fact that this paper presents an overview of current research for the given topic, it also targets the research community and other stakeholders interested in this contemporary and attractive field for the purpose of recognizing research gaps and recommending new research directions.

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Section: Access Architecture Related Radio Technologymentioning

confidence: 99%

Section: Access Architecture Related Radio Technologymentioning

confidence: 99%

Section: Access Architecture Related Radio Technologymentioning

confidence: 99%

Section: Access Architecture Related Radio Technologymentioning

confidence: 99%

See 2 more Smart Citations

IoT’s Tiny Steps towards 5G: Telco’s Perspective

Cero¹,

Husić

Baraković

2017

Symmetry

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“…The main reason for the popularity of LDPC codes is their near Shannon limit performance with relatively low decoding complexity based on message-passing algorithms. These codes have been adopted in a number of standards such as IEEE 802.11n (WiFi) [100], IEEE 802.16e (WiMAX) [101], IEEE 802.22 (WRAN) [102], IEEE 802.3an (10GBASE-T Ethernet) [103], DVB-T2 [104] and DVB-S2 [105] and are best candidates in the next generation of optical networks [86], data storage systems [21] and 5G networks [4]. Message passing decoders are iterative algorithms that operate on Tanner graphs [82] of LDPC codes by computing messages at the nodes of the graph and passing them along the edges to the adjacent nodes.…”

Section: Motivationmentioning

confidence: 99%

Characterization of Problematic Graphical Structures of LDPC Codes and the Corresponding Efficient Search Algorithms

Toroghi¹

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In this thesis, we study all the problematic graphical structures which play important roles in the error floor performance and error correction capability of low-density parity-check (LDPC) codes. These graphical structures are: leafless elementary trapping sets (LETSs), elementary trapping sets (ETSs), non-elementary trapping sets (NETSs), stopping sets and codewords. Recently, Karimi and Banihashemi proposed a characterization of LETSs, which was based on viewing a LETS as a layered superset (LSS) of a short cycle in the code's Tanner graph. However this characterization was not exhaustive. In this work, first, we complement LSS characterization by demonstrating how the remaining structures of LETSs can be characterized. Then, we propose a new characterization for LETSs of variable-regular LDPC codes. Compared to the LSS-based characterization, which is based on a single LSS expansion technique, the new characterization involves two additional expansion techniques. The introduction of the new techniques mitigates the search efficiency problem that LSS-based characterization/search suffers from. We prove that using the three expansion techniques, any LETS structure can be obtained starting from a simple cycle, no matter how large the size of the structure a or the number of its unsatisfied check nodes b are, i.e., the characterization is exhaustive. We also demonstrate that for the proposed characterization/search the length of the short cycles required to be enumerated is minimal. We also prove that the three expansion techniques, proposed here, are the only expansions needed for characterization of LETS structures starting from simple cycles in the graph.Moreover, we generalize the proposed approach of variable-regular to irregular LDPC codes. We explain how the characterization of LETS structures in variableregular graphs can be used to characterize the LETS structures of irregular graphs (in a given range of a and b values, exhaustively). This characterization corresponds to an exhaustive search algorithm. However, this approach is not applicable to irregular LDPC codes, if we are interested to find LETSs in a relatively wide range of iii First, I would like to thank my supervisor, Professor Amir H. Banihashemi for leading and encouraging me during my research. His guidance helped me in all the time of research and writing of this thesis.Thanks must also go to my committee members for their helpful suggestions and discussions.

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Standardization: The Road to 5G

Galante¹,

Romano²

2018

5G Networks: Fundamental Requirements, Enabling Technologies, and Operations Management

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5G – Wireless Communications for 2020

Cited by 27 publications

References 68 publications

IoT’s Tiny Steps towards 5G: Telco’s Perspective

IoT’s Tiny Steps towards 5G: Telco’s Perspective

Characterization of Problematic Graphical Structures of LDPC Codes and the Corresponding Efficient Search Algorithms

Standardization: The Road to 5G

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