Comparison of active and passive optical access networks

Larsen, Claus Popp; Gavler, Anders; Wang, Kun

doi:10.1109/ctte.2010.5557694

Cited by 14 publications

(13 citation statements)

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“…Note that a similar challenge has been faced before in access networks employing optical communications. Fiber strands were only able to physically reach the premises of individual domestic customers after the concept of passive optical networks (PON) has been developed to ease capital and operational expenses (CAPEX and OPEX, respectively) of optical solutions [25].…”

Section: The Role Of Optical Connectivity In Iotmentioning

confidence: 99%

“…The Radio horizon for a 30 m height gateway antenna and an end station at 1 m is around 20 km [27], which is within LoRa's and SigFox's experimentally reported ranges. Coincidently, this is also Gigabit PON (G-PON)'s maximum non extended reach [25,29]. 20 km makes up an important optical and wireless landmark for IoToF to surpass and find its own niche.…”

Section: Requirements For Iot Over Fiber (Iotof)mentioning

confidence: 99%

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IoToF: A Long-Reach Fully Passive Low-Rate Upstream PHY for IoT over Fiber

et al. 2019

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Internet of things (IoT) devices heavily rely on wireless connectivity. There are intrinsic overlooked limitations such as reach, availability, security and safety vulnerabilities closely associated with wireless solutions. Wired connectivity is the alternative to tackle those issues, and optical fibers directly connecting IoT devices could provide them unique features such as huge bandwidth, long reach, signal integrity and high security grade for the transmitted information. Nevertheless, it can be prohibitive for IoT devices which are power hungry and have costly electrical-to-optical conversions. In this paper, first, a niche is identified for IoT over fiber (IoToF) based on fully passive optical solutions for long reach upstream of low data rate optical connectivity over dark fibers. Then, we proposed, implemented and characterized a prototype physical connectivity (PHY) based on fiber Bragg grating (FBG) low-cost acousto-optic modulation at IoT devices and respective optical edge-filtering as wavelength discriminator at the receiver. Finally, we performed an experimental demonstration of upstream data communication based on simple M-ary frequency-shift keying (FSK), with baud rate of 300 bps transmitted over 30 km range. In terms of data rate and reach for niche applications, IoToF can outperform traditional wireless technologies, such as Sigfox or LoRa. IoToF will enable monitoring urban areas with scarce and polluted spectrum, industrial areas requiring intrinsic safety, and upstreaming data from IoT devices in remote locations with unfavorable wireless propagation but with dark fibers available.

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Section: The Role Of Optical Connectivity In Iotmentioning

confidence: 99%

Section: Requirements For Iot Over Fiber (Iotof)mentioning

confidence: 99%

IoToF: A Long-Reach Fully Passive Low-Rate Upstream PHY for IoT over Fiber

et al. 2019

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“…By using on-off keying pattern in OCDMA network, a particular address code is encoded by a bit '1' of a particular user. If data bit "0" is to be sent, no light pulse is generated by transmitting section [6]. Block diagram is given below Fig.…”

Section: Swati Davinder Prakashmentioning

confidence: 99%

Performance Improvement of FTTH Architecture with OCDMA Technique

Swati¹,

Prakash²

2019

IJITEE

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In proposed simulation model, Fiber to the home (FTTH) architecture with a filter called fiber Bragg grating (FBG) based the optical code division multiple access (OCDMA) technique used to provide access to number of users to share all the bandwidth simultaneously. FTTH provides higher bandwidth than the traditional existing technology of broadband, having the capability of providing all the servixces of communication like data services, voice services and video services. The traditional metallic cables are replaced with optical fibers in Fiber to the Home to end line consumers. OCDMA provides high reliable communication. The performance improvement of FTTH architecture is done through OCDMA technique. In paper at very first, FTTH, the system with OCDMA is explained after that the architecture of FTTH using OCDMA technique, its principle explained. The proper coordination of time plays an important role in OCDMA, otherwise there is more chances of overlapping of signals and noise which may some time lead to crosstalk. There is a use of FBG as an encoder and decoder because of its low cost and the investigation is done on eye opening, BER, Q factor. The proposed model provides high Q-factor and minimum BER which is required for demands of the future communication services.

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“…Currently, all the sections of the access network are mainly built in a rather static fashion, considering neither the dynamics nor the locality nature of current traffic characteristics [2]. [5].…”

Section: Introductionmentioning

confidence: 99%

“…Leveraging the presence of active remote nodes close the end users towards the goal of convergence of wireless and wired first-mile technologies is notably a goal of the recently started European FP7 project SODALES[10] 5. This is especially relevant in an open-access context[12]: a network provider would be able to offer high degree of network virtualisation to its customers (such as internet service providers) at the wavelength level.…”

mentioning

confidence: 99%