WDM-PON experiences in Korea [Invited]

Lee, ChangHee; Lee, Sang-Mook; Choi, Kang‐Hoon; Moon, Jung-Hyung; Mun, Sil-Gu; Jeong, Ki-Tae; Kim, Jin Hee; Kim, Byoung-Whi

doi:10.1364/jon.6.000451

Cited by 70 publications

(22 citation statements)

References 29 publications

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“…It also becomes evident from this figure that the ONU offered load, before packet delay reaches the 5 ms limitation for time-sensitive traffic, has been extended from 39, 42, and 53 Mbps to 59, 65, and 78 Mbps for SLs 1, 2, and 3 ONUs, respectively. The gained 20, 23, and 25 Mbps bandwidth for SLs 1, 2, and 3 ONUs can then be utilized to support additional multimedia services for each ONU, such as online gaming, education-on-demand, and video conferencing [16].…”

Section: B Two-state Dmb Assignmentmentioning

confidence: 99%

Full-Service MAC Protocol for Metro-Reach GPONs

Chang

Álvarez

Kourtessis

et al. 2010

J. Lightwave Technol.

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Abstract-An advanced medium access control protocol is presented demonstrating dynamic bandwidth allocation for long-reach gigabit-capable passive optical networks (GPONs). The protocol enables the optical line terminal to overlap the idle time slots in each packet transmission cycle with a virtual polling cycle to increase the effective transmission bandwidth. Contrasting the new scheme with developed algorithms, network modeling has exhibited significant improvement in channel throughput, mean packet delay, and packet loss rate in the presence of class-of-service and service-level differentiation. In particular, the displayed 34% increase in the overall channel throughput and 30 times reduction in mean packet delay for service-level 1 and service-level 2 optical network units (ONUs) at accustomed 50% ONU load constitutes the highest extended-reach GPON performance reported up to date.Index Terms-Class of service (CoS), dynamic bandwidth allocation (DBA), fiber-to-the-home (FTTH), gigabit-capable passive optical network (GPON), long-reach passive optical network (long-reach PON), quality of service (QoS), service level agreement (SLA).

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Section: B Two-state Dmb Assignmentmentioning

confidence: 99%

Full-Service MAC Protocol for Metro-Reach GPONs

Chang

Álvarez

Kourtessis

et al. 2010

J. Lightwave Technol.

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“…One promising approach has recently been proposed that enables color-free and identical transmitters by using an automatic wavelength-locking scheme [8]- [10]. This scheme relies on providing an optical seeding signal generated at the optical line termination (OLT) that can be used to wavelength-lock the identical optical transmitters located at each remote ONT.…”

Section: Wdm-pon Based Wavelength Locked F-p Ldmentioning

confidence: 99%

“…Since this reference signal has to pass through the wavelength passband of the AWG at the RN, each of the identical ONTs is automatically aligned to the optical channel defined by the WDM-PON infrastructure. Recently, commercial WDM-PON systems based on wavelength locked F-P LD have been deployed in Korea [10]. It may also be possible to use the downstream data signal as a seed for the ONT transmitter, but large penalties result in both dynamic range and ONT complexity [11].…”

Section: Wdm-pon Based Wavelength Locked F-p Ldmentioning

confidence: 99%

WDM-PON Based on Wavelength Locked Fabry-Perot LDs

Lee¹,

Mun²

2008

Journal of the Optical Society of Korea

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A WDM-PON has been considered as an ultimate solution for access networks. However, there were many technical and practical issues for commercial deployment. These issues were solved with wavelength locked F-P LD and the WDM-PONs employing this optical source were commercialized. These WDM-PON systems have been deployed in Korea, Europe, and US. We reviewed wavelength locking technology and WDM-PON achievements. When we inject spectrum sliced broadband light into an F-P LD, the multimode output is changed to a quasi single mode. Then, we can use the single mode light for WDM signal transmission. The broad spectral gain of the semiconductor gain medium enables a color-free operation of WDM-PON, i.e., an identical ONT can be used for each user. The wavelength locking properties depend on many parameters, especially alignment of injection wavelength to a lasing mode, passband profile of AWG and front facet reflectivity of F-P LD. However, these dependencies can be reduced by proper design of the laser and the injection bandwidth. Thus, WDM-PON systems have been achieved with color-free operation.

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“…Na Coréia do Sul, onde está implantada comercialmente uma WDM-PON, o travamento por injeção de lasers F-P LD foi utilizado tanto no downstream (banda E, 1426 -1449 nm), quanto no upstream (banda C, 1534-1559 nm) [93]- [94]. Dessa forma, uma série de lasers idênticos e de baixo custo foram utilizados para prover uma taxa de 100 Mbps.…”

Section: Remote Interrogation Of Terminal Network (Ritenet)unclassified

“…Figura 3.9: Travamento por injeção de FP-LD no upstream [93] Outra alternativa é a utilização de amplificador óptico semicondutor reflexivo (RSOA) nas ONUs [90], [95]. Um dos primeiros trabalhos utilizando RSOAs nas ONUs remodulando o sinal de downstream para obtenção do sinal de upstream foi publicado em 2005 [96].…”

Section: Remote Interrogation Of Terminal Network (Ritenet)unclassified

Estudo de topologias para redes WDM-PON

Silva¹

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WDM-PON experiences in Korea [Invited]

Cited by 70 publications

References 29 publications

Full-Service MAC Protocol for Metro-Reach GPONs

Full-Service MAC Protocol for Metro-Reach GPONs

WDM-PON Based on Wavelength Locked Fabry-Perot LDs

Estudo de topologias para redes WDM-PON

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