Networks and devices for the 5G era

This work 1 analyses the Generalized Degrees-of-Freedom (GDoF) of the 2-User Multiple-InputSingle-Output (MISO) Broadcast Channel (BC) in the so-called Distributed CSIT regime, with application to decentralized wireless networks. This regime differs from the classical limited CSIT one in that the CSIT is not just noisy but also imperfectly shared across the transmitters (TXs). Hence, each TX precodes data on the basis of local CSIT and statistical quality information at other TXs. We derive the GDoF result and obtain the surprising outcome that by specific accounting of the pathloss information, it becomes possible for the decentralized precoded network to reach the same performance as a genieaided centralized network where the central node has obtained the estimates of both TXs. The key ingredient in the scheme is the so-called Active-Passive Zero-Forcing (AP-ZF) precoding, which lets the precoder design adapt optimally with respect to different local CSIT qualities available at different TXs.

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“…CSIT is perfectly shared among the TXs over a so-called ideal Cloud Radio Access Network (C-RAN) [3].…”

Section: Arxiv:170204295v1 [Csit] 14 Feb 2017mentioning

confidence: 99%

Generalized degrees-of-freedom of the 2-user case MISO broadcast channel with distributed CSIT

Bazco

Kerret

Gesbert

et al. 2017

2017 IEEE International Symposium on Information Theory (ISIT)

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“…These SCs provide capacity increase in hotspots, fill coverage gaps of macro cells in both indoor and outdoor, and increase network performance by offloading macro cells. After incorporating these SCs, the resultant network is Heterogeneous Network (HetNet) [9]. In HetNet cells are categorized into macro, micro, pico, and femto on basis of BS power.…”

Section: B Hetnetsmentioning

confidence: 99%

A Survey on Current Repertoire for 5G

Nadeem¹,

Saeed²,

Khan³

2017

IJITCS

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Abstract-Cellular technology progressed miraculously in the last decade. It has redefined communication paradigm. Statistics provided by Ericson and Cisco show the number of mobile connected devices will reach figures of 9.2 billion and 11.6 billion respectively by 2020. Overall connected devices will surpass 50 billion then. Extremely higher data rates, zero latency, massively scalable, connecting everything anywhere is what that 5G promises. To meet such ambitious goals which apparently seems challenging, the tools and technologies that mobile communication has in its repertoire and what it needs more either enhancement in existing solutions or new solution or joint venture of both, is a question that demands an answer. To realize 5G, evolution and revolution both approaches are being employed. Evolution seeks enhancements in existing technologies while revolution looks for new innovations and technologies. Extension in frequency spectrum, network densification, MIMO, carrier aggregation, Centralized-RAN, HetNets, and Network Functionality Virtualization are the key enablers. This paper disseminates information about ongoing research and development of 5G.

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“…In 5G communications, the adoption of a dense heterogeneous architecture, comprising macrocells and small cells, is one of the most promising low-cost solutions that will allow 5G networks to meet the industry's capacity growth needs and to provide a uniform connectivity experience on the end-user's side (Bangerter, 2014). Based on the latest literature, we consider that a potential 5G communication architecture in a macrocell scale, as it is depicted in Fig.1, will include the Base Station (BS), equipped with large antenna arrays, as well as additional large antenna arrays of the BS geographically distributed over the macrocell network.…”

Section: Overview Of a Potential 5g Communication System Architecturementioning

confidence: 99%

“…Towards this direction, 5G communications will integrate multiple existing advanced technologies with innovative new techniques. However, this integration can lead to tremendous security challenges in future 5G mobile networks (Bangerter, 2014).…”

Section: Introductionmentioning

confidence: 99%