Demonstration of Low-Power Bit-Interleaving TDM PON

Chow, Hungkei; Suvakovic, Dusan; Veen, Doutje van; Dupas, A.; Boislaigue, Roger; Farah, Robert; Lau, Man Fai; Galaro, Joe; Qua, G.J.; Anthapadmanabhan, N. Prasanth; Torfs, Guy; Praet, Christophe Van; Yin, Xin; Vetter, Peter

doi:10.1364/eceoc.2012.mo.2.b.1

Cited by 27 publications

(13 citation statements)

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“…XLG:BI uses an alternative bit-interleaving protocol to transmit DS traffic. By interleaving the bits for different ONUs, the electronic processing speed of the ONU receiver can be reduced, resulting in a lower ONU energy consumption [10].…”

Section: Technologies Considered In This Papermentioning

confidence: 99%

Energy efficiency analysis of high speed triple-play services in next-generation PON deployments

et al. 2015

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In this paper, the energy consumption of high speed access services up to 1 Gb/s per customer is estimated for different passive optical network (PON) technologies. While other studies on PON power consumption typically assume a fixed split ratio, we also consider a greenfield approach, where the split ratio can be optimized for each technology, taking full advantage of its capacity and reach. The split ratio optimization takes into account Quality of Service (QoS) in terms of bandwidth availability and packet loss for triple-play services (voice, television and Internet). This paper includes an in-depth discussion of our split ratio dimensioning approach and our power consumption model for an optical access network in a major city. The obtained results show that statistical gain provided by dynamic bandwidth allocation as well as power splitting ratio optimization in PONs are key factors for achieving energy efficiency. For access rates up to 900 Mb/s, XG-PON1 turns out to be the most energy efficient option. For higher access rates up to 1 Gb/s, the optimal technology depends on split ratio restrictions. If an existing optical distribution network (ODN) with split ratio 1:64 is used, XG-PON1 remains the most energy efficient technology. If higher split ratios up to 1:256 can be achieved, TWDM PON becomes the most energy efficient solution for access rates up to 1 Gb/s.

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Section: Technologies Considered In This Papermentioning

confidence: 99%

Energy efficiency analysis of high speed triple-play services in next-generation PON deployments

et al. 2015

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“…The Bi-PON protocol [6] allows TDM to work on bit-basis rather than frame-basis. As common in other PON protocols, the payload is encapsulated in a frame and is preceded by a header, which informs ONUs about how to retrieve their respective data.…”

Section: Bit-interleaving Concept and Bi-cdr Operationmentioning

confidence: 99%

10 Gbit/s bit interleaving CDR for low-power PON

Praet

Torfs

et al. 2012

Electron. Lett.

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A novel, low power, downstream clock and data recovery (CDR)-decimator architecture is proposed for next generation, energy efficient 10 Gb/s optical network units (ONUs). The architecture employs a new time division multiplexing (TDM) bit-interleaving downstream concept for passive optical networks (Bi-PON) allowing early decimation of the incoming data and lowering of the processing speed to the user rate of the ONU, thus reducing the power consumption is significantly.Introduction: As the demand for broadband services keeps rising, data-rates in access networks keep increasing. Despite technological improvements, energy consumption in high speed access networks is expected to rise inevitably. Considering the vast amount of subscribers, the total power consumption in the ONUs is of major concern. Presentday ecological awareness, increasing energy costs and thermal concerns require drastic measures to be taken.Because of the very low losses in optical fibers, PON in itself is a very energy-efficient technology. Standard downstream time division multiplexing PON (TDM-PON) protocols, however, are inherently energyinefficient as they operate on frame-level. This requires an ONU to process every frame header at the aggregated line-rate, even though the majority of the packets are intended for other users. Data within frames has to be processed at full line-rate speed until the ONU determines its designated receiver. In conventional TDM-PON, a burst-mode transmission operation is used in the upstream direction. Its operation is relatively more energyefficient than the downstream direction because of its inherent load dependency.Both ITU-T and IEEE have recently opened the discussion on the energy-saving potential of PONs [1][2][3][4], which led to intensive research to address this problem [2][3][4][5]. Thus far, the attention is mostly focussed on the possibility of introducing sleep mode techniques into the standard PON systems. Ideally an ONU with sleep mode support would only be awake during reception of its own payload. Practically, however, non-negligible sleep/wake transition times [2] and quality of service (QoS) requirements [3] limit the efficacy of these techniques.Theoretically, the lower limit for the power-consumption in ONUs is dictated by the actual user-rate, which typically is a fraction of the aggregated line-rate. While conventional TDM-PON protocols are inherently operating at line-rate, the proposed bit-interleaving CDR (Bi-CDR) takes advantage of the line-rate -user-rate discrepancy. In every frame period, the Bi-CDR decimates and offsets the downstream payload reception based on Bi-PON frame header information. Because the interleaving takes place on bit-level, the bits intended for a specific user are uniformly spread in time. This allows ONUs to sample data at their own respective user rate. In this way, downstream bandwidth is dynamically allocated through header information, preceding the encapsulated bitinterleaved payload.

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“…Passive optical networks (PONs) have been widely deployed as flexible, scalable optical access networks in recent years. Time division multiplexing (TDM) PONs [4], wavelength division multiplexing (WDM) PONs [5,6], optical orthogonal frequency division multiplexing (OFDM) PONs [7,8], and TDM/WDM PONs [9] are all interesting candidates for next-generation access networks, and have been researched widely. TDM PONs, such as IEEE802.3xx GE-PON and ITU-T G.984 GPON, have been actively deployed worldwide as basic access networks that provide low cost and high reliability, through one-to-multiple point connections via a power splitter between the remote node (RN) and optical network units (ONU).…”

Section: Introductionmentioning

confidence: 99%

OATM/WDM Optical Access Network Using Header Decoder-Based Router for Next-Generation Communications

Park

2016

Journal of the Optical Society of Korea

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We demonstrate an optical asynchronous transfer mode/wavelength division multiplexing (OATM/WDM) optical access network, using a router based on an optical header decoder to conduct next-generation communications. The router consists of a decoder or hardware analysis processing of the header bit and switches. The router in the OATM/WDM optical access network is a key technology by which to satisfy subscribers' requests, including reliability, cost efficiency, high speed, large-capacity transmission, and elevated information security. In this study, we carry out experiments in which a header decoder delivers to 16 and 32 subscribers with a single wavelength in the router. These experiments confirm the decoder's successful operation via hardware using 4 and 5 header bits. We propose that this system may significantly contribute toward the realization of an optical access network that provides high-quality service to subscribers of next-generation communications.

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Demonstration of Low-Power Bit-Interleaving TDM PON

Cited by 27 publications

References 1 publication

Energy efficiency analysis of high speed triple-play services in next-generation PON deployments

Energy efficiency analysis of high speed triple-play services in next-generation PON deployments

10 Gbit/s bit interleaving CDR for low-power PON

OATM/WDM Optical Access Network Using Header Decoder-Based Router for Next-Generation Communications

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