• 제목, 요약, 키워드: hybrid PON

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2.5 Gbps Hybrid PON link Using RSOA Based WDM-PON and a Reach Extender (RSOA기반 WDM-PON 링크와 Reach Extender를 이용한 2.5 Gbps 하이브리드 PON 링크 기술)

  • Kim, Kwang-Ok;Lee, Jie-Hyun;Lee, Sang-Soo;Jang, Youn-Seon
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.36 no.6B
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    • pp.583-591
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    • 2011
  • We presents the architecture of the 2.5 Gbps hybrid PON link which can increase of the transmission distance and link capability, and split ratio by using a colorless DWDM-PON and O/E/O based reach extender into an existing G-PON link. A RSOA based DWDM-PON to apply the feeder fiber can provide a link capacity of 32 larger that of a legacy G-PON. The reach extender converts the wavelength of DWDM-PON to G-PON through GTC frame regeneration at the remote node, and can provide a burst reset signal in order to extract upstream burst signal, simultaneously. The proposed hybrid PON enable a legacy G-PON to operate over the maximum 60 km distance with a 128-way split per WDM wavelength.

Wavelength Integration Transmission Method for Hybrid-PON (Hybrid-PON을 위한 파장통합 전송방식)

  • Kim, Jin-Hee;Cheong, Ki-Tae;Chung, Hae
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.34 no.11B
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    • pp.1207-1215
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    • 2009
  • The FTTH is known as an optimal solution to provide broadband services like IPTV and the W-PON is a good alternative to implement the FTTH. It is firstly commercialized in Korea but not widely deployed because of it's high price. In this paper, we suggest a wavelength integration method to drop the price and enhance the utilization of the W-PON. The method makes one logical channel with multiple wavelengths when the W-PON system has to accommodate a signal of which transmission rate is greater than the rate of a single wavelength. Accordingly, the system can accommodate any signal rate. We introduce a frame structure, suggest synchronization and clock recovery methods, and finally show actual applications for the Ethernet and the G-PON.

Hybrid-FTTH technology development status and its business prospects (Hybrid-FTTH 기술개발 동향 및 사업전망)

  • Park Hyung-Jin;Yoon Ho-Seong;Kim Jin-Hee
    • 한국정보통신설비학회:학술대회논문집
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    • pp.7-10
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    • 2006
  • FTTH service has been deployed since last year in the single dwelling unit environment. FTTH based on PON technology has many advantages in OPEX compared to FTTC solutions using the BBx. But this is not the case for the MDU environment where new wiring of the fiber cable in the customer premises network costs a lot of money. The purpose of Hybrid-FTTH is to overcome this problem by preserving the wiring environment of the customer premises environment in MDU but still guarantee the quality of service provided by FTTH. In this thesis, we present Hybrid-FTTH technology, especially focused on the DWDM-PON based Hybrid-FTTH technology and its development status.

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Scheduling Algorithm for WDM-PON in SUCCESS Network Architecture (SUCCESS 네트워크 구조에서의 WDM-PON을 위한 스케줄링 알고리즘)

  • Kim, Hyun-Sook
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.30 no.7B
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    • pp.427-432
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    • 2005
  • Emerging high broad band multimedia service with high quality has led to demand for challenge of optical access network and Passive Optical Network is one of the most important technologies for future optical access network. In this paper, we study the scheduling algorithm for WDM-PON in SUCCESS network architecture, a next generation hybrid WDM/TDM optical access network architecture. Due to economic implementation of this architecture, the shared resources efficiently need to be assigned and then we propose the efficient scheduling algorithm based on specific architecture and characters of SUCCESS. We evaluate and analyze the performance in terms of the average packet delay and throughput of the whole system.

Design and Verification of LAN Emulation Function for Hybrid Two-Stage AWG based WDM-PON (혼합형 2단 AWG 기반의 WDM-PON을 위한 LAN 에뮬레이션 기능 설계 및 검증)

  • Han, Kyeong-Eun;Yang, Won-Hyuk;Kim, Young-Chon
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.33 no.3B
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    • pp.91-99
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    • 2008
  • In this paper, we design the function of ULSLE(Upper Layer Shared LAN Emulation) to provide both the efficient LAN service and compatibility with 802.1D bridge in Hybrid two-stage AWG based WDM-PON. The ULSLE layer lies above MAC control layer in order to provide a mean to interface WDM-PON and 802.1D bridge. It also performs LAN emulation based on PON-Tag which is only used to decide both the transmission mode and the destination of frames transmitted from ONUs. That is, the PON-Tag is not used for downstream frames but destination address field in original frame instead. This decreases the processing overhead and complexity caused by PON-Tag at OLT and ONU. The verification of designed ULSLE is performed according to the specific scenarios based on transmission mode and destination using OPNET.

Performance Analysis of 5Gbps/1.25Gbps WDM/TDM Hybrid Passive Optical Network with Inverse Return to Zero(RZ) coded Downstream and NRZ upstream re-modulation by Performing Simulation with MATLAB (모의실험을 통한 역 RZ 부호로 코딩된 하향신호의 재변조를 이용한 5Gbps/1.25Gbps WDM/TDM 하이브리드 수동 광가입자 망의 성능분석)

  • Park, Sang-Jo
    • Journal of the Korea Society of Computer and Information
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    • v.17 no.8
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    • pp.51-60
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    • 2012
  • I propose the 5Gbps/1.25Gbps WDM/TDM hybrid Passive Optical Network(PON) with inverse RZ(Return to Zero) code coded downstream and NRZ(Non Return to Zero) upstream re-modulation and analyze its performance by performing simulation with MATLAB. The results have shown that an optical line termination (OLT) can be connected to 8, 16 optical network unit (ONU)s with the Bit Error Rate(BER) of $10^{-9}$ when the distance between OLT and ONU is 10Km and transmitted optical powers are more than -3.8, -0.9dBm, respectively. The proposed WDM/TDM hybrid PON system can solve the problem of data rate limit in upstream which happened in the conventional TDM PON because the upstream data rate is proportional to ONU and does not require a light source in ONU and its control circuits in OLT, thus can be a useful technology for asymmetric optical subscriber networks.

Design and Performance Evaluation of Hybrid Two-Stage AWG based WDM-PON Architecture (혼합형 2단 AWG 기반의 WDM-PON 구조 설계 및 성능평가)

  • Han Kyeong-Eun;Lee Seung-Hyun;Kim Young-Chon
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.31 no.7B
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    • pp.573-582
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    • 2006
  • In this paper, we propose a hybrid two-stage AWG-based WDM-PON architecture in order to overcome the limitations of the existing PONs and single AWG-based WDM-PONs as well as to accomodate the new services and the expandability of network. The proposed architecture employs two-stage AWG for downstream transmission and single AWG and combiners for upstream one at RN. It also employs the separated fiber with multi-wavelength for both direction. It leads to high scalability, low cost, and high capacity for transmission. In downstream transmission, the transparency can be guaranteed since the traffic is transmitted to ONU through each channel. However, several ONUs share the channel for upstream one by using WDM/TDMA scheme because the asymmetrical feature of networks is considered. The performance of the proposed one is evaluated and compared with other architectures in terms of cost, network capacity and up/downstream bandwidth.

Bidirectional Hybrid DWDM-PON for HDTV/Gigabit Ethernet/CATV Applications

  • Lu, Hai-Han;Tsai, Wen-Shing;Chien, Tzu-Shen;Chen, Shih-Hung;Chi, Yu-Chieh;Liao, Che-Wei
    • ETRI Journal
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    • v.29 no.2
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    • pp.162-168
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    • 2007
  • A new scheme for bi-directional HDTV/Gigabit Ethernet/CATV transmission over a hybrid dense-wavelength-division-multiplexing passive optical network (DWDM-PON) is proposed and demonstrated. It is based on injection-locked vertical-cavity surface-emitting lasers and distributed-feedback laser diodes as transmitters. Services with 129 HDTV channels, a 1.25 Gbps Gigabit Ethernet connection, and 77 CATV channels are successfully demonstrated over 40 km single-mode fiber links. Good performance of bit error rate, carrier-to-noise ratio, composite second order, and composite triple beat is achieved in our proposed bidirectional DWDM-PON.

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Design of MAC Chip for AWG Based WDM-PON - I : Input/Output Nodule (AWG 기반 WDM-PON을 위한 MAC 칩 설계- I: 입출력 모듈)

  • Yang, Won-Hyuk;Han, Kyeong-Eun;Kim, Young-Chon
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.33 no.6B
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    • pp.456-468
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    • 2008
  • In this paper, we design Input/Output modules as a preference work for implementation of hybrid two stage AWG based WDM-PON and verify operations of each function modules through the logic simulation. This WDM-PON system provides service to 128 ONUs through 32 wavelength and one wavelength is shared for upstream transmission with four ONU while each wavelength is allocated to each ONU for downstream transmission. The designed WDM-PON MAC chip is based on sub-MAC which consists of one control unit and reception unit and four transmission unit. To design the reception and transmission unit of sub-MAC, we define the functions of the sub-MAC, pins of the modules, control signal and timing of each signal. We intend to design MAC chip with 1Gbps transmission rate. Thus the designed MAC chip is worked on 125MHz clock rate. We define FSM and design Input/Output modules with VHDL. The logic simulation of the modules is executed by the ModelSIM simulator.