MGFAST: A New Generation of Copper Broadband Access

Oksman, Vladimir; Strobel, Rainer; Starr, Thomas L.; Maes, Jochen; Coomans, Werner; Kuipers, Martijn; Tovim, Erez Ben; Dong, Wei

doi:10.1109/mcom.2019.1800844

Cited by 27 publications

(27 citation statements)

References 7 publications

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“…In MGfast, the copper loops employed between the DPUs and the CPE are designed to range from 30 m to 100 m 1 and the deployments may support both single-dwelling unit (SDU) and multi-dwelling unit (MDU) [11], [14]. Moreover, MGfast is projected to coexist with other transmission systems such as G.fast or satellite TV (SAT TV) [4], [15].…”

Section: A Network Architecturementioning

confidence: 99%

“…In order to estimate the data capacity of MGfast access systems over coaxial cables, PSD-based simulations were performed in STDD operation mode. Therefore, assuming that the coaxial media is a memoryless additive white Gaussian noise (AWGN) channel and considering that MGfast uses DMT [4], [21], in which a serial data stream is divided into multiple orthogonal independent sub-channels (also called tones) k containing a fixed bandwidth ∆f , the bit allocation, i.e., the bit loading, in each sub-channel k is obtained from:…”

Section: A Transmission Capacitymentioning

confidence: 99%

“…In fact, in STDD MGfast systems, the cyclic prefix only has to counter the impulse response delay spread, whereas in full-duplex MGfast the cyclic prefix is used to counter the delay spread and a cyclic suffix is employed to counter the propagation delay in the cable [5], [6]. This paper adopts cyclic prefix configurations compatible with G.fast [4], which include an associated overhead to the system varying between 0 and 13% [3], [5], [31].…”

Section: A Transmission Capacitymentioning

confidence: 99%

“…to this, MGfast aims at operating under low power consumption, leading distribution point units (DPUs) to be supplied by the users through the copper cables, using technologies such as reverse power feeding (RPF) [3], [4], [11].…”

mentioning

confidence: 99%

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Performance Evaluation of MGfast Systems Over Coaxial Cables

Freitas¹,

Ohashi²,

Acatauassu³

et al. 2021

JCIS

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Section: A Network Architecturementioning

confidence: 99%

Section: A Transmission Capacitymentioning

confidence: 99%

Section: A Transmission Capacitymentioning

confidence: 99%

mentioning

confidence: 99%

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Performance Evaluation of MGfast Systems Over Coaxial Cables

Freitas¹,

Ohashi²,

Acatauassu³

et al. 2021

JCIS

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“…6). From an industrial and a commercial perspective, the expected technological advances in the forthcoming generation of wireline access networks are investigated in further details in [20], [21].…”

Section: B System Architecturementioning

confidence: 99%

Far-End Crosstalk Mitigation for Future Wireline Networks Beyond G.mgfast: A Survey and an Outlook

Zhang

et al. 2020

IEEE Access

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With the escalating demand for high speed, high reliability, low latency, low cost and ubiquitous connectivity, the telecommunications industry is entering a new era where the ultimate optimality of the current wireline-wireless access network has to be achieved. Regarding the current wireline network paradigm, dominated by the copper-based digital subscriber lines (DSL) technology, multi-Gigabit data rate is the ambitious design objective at the customer end for the forthcoming ITU-T G.mgfast standard. In order to prepare for the new challenges in the era of total network convergence, both the wireline and the wireless community must be able to think beyond their respective conventions and learn from each other if necessary. Overall, the current DSL-based wireline network architecture is prone to the mutual interference resulting in far-end crosstalk (FEXT). The newly expanded 424/848 MHz spectrum of the ambitious G.mgfast project introduces far higher FEXT than that over the current 212/30 MHz G.fast/VDSL2 band. Additionally, the coexistence of multiple standards will also cause 'alien' FEXT. In these cases, using the plain zero forcing precoding (ZFP) will no longer attain a sufficiently high performance. However, as shown in the field of wireless communications, using lattice reduction as a signal space remapping technique significantly improves the performance of traditional multiuser detectors (MUD) and of the respective multiuser precoders (MUP). These promising techniques have largely remained unexploited in commercial wireless communications, due to their complexity in the face of the rapidly fluctuating wireless channels. In this survey, we present an overview of the state-of-the-art in wireline access network and an outlook for recent technological advances in the holistic 'wireline + wireless' access network in the context of network convergence, focusing on the dominant challenge of FEXT mitigation in future DSL networks. Against this background, we investigate both the family of linear precoding and of the Tomlinson-Harashima precoding (THP) schemes conceived for classic DSL. Furthermore, we present a tutorial on the family of lattice reduction aided MUPs, as well as quantifying their expected performances in realistic DSL scenarios. As a by-product, we also demonstrate the duality between MUP and MUD, in the hope that the fifty years' history of MUD could be used to accelerate the development of efficient near-optimal MUPs for future DSL. Under the recommended operating conditions of the 212 MHz profile of G.fast, our benchmark comparisons indicate that the lattice reduction aided techniques are very powerful compared to conventional schemes. In particular, their good performances do not rely on optimized spectrum balancing, and they are also shown to be relatively robust against channel state information (CSI) estimation error, under the assumption of perfectly time-invariant DSL channels.

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