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동적 QoS 지원을 위한 NGN 모델 기반 XG-PON 구조 설계
이영석(Young-suk Lee),이동수(Dong-su Lee),김영한(Young-han Kim) 대한전자공학회 2012 電子工學會論文誌-TC (Telecommunications) Vol.49 No.1
본 논문은 10G G-PON(Gigabit passive optical network) 네트워크와 NGN(Next generation network) 연동 구조를 설계하고, 10G G-PON 연동 시 문제점 해결을 위한 동적 GEM(G-PON encapsulation mode) Port-ID 할당 방법을 제안했다. 동적 GEM Port-ID 할당 방법은 OMCI(ONT management control and interface) 구조 설계를 통해 IP 주소와 포트 번호를 혼합한 형태의 맵핑 구조를 갖는다. 이는 NGN이 요구하는 클래스 기반 QoS(Quality of service) 뿐만 아니라 트래픽 단위의 QoS 지원까지 가능한 구조로서, 기존 G-PON 네트워크를 NGN에 그대로 적용시킨 구조 보다 QoS 지원에 있어 30% 이상 성능을 향상 시킨다. In this paper, we designed an inter-operation architecture of 10G G-PON(Gigabit passive optical network) network and NGN(Next generation network) architecture. And, we proposed mechanism of dynamic GEM(G-PON encapsulation mode) Port-ID allocation. This is able to solve a problem of 10G G-PON inter-operation. The mechanism of dynamic GEM Port-ID allocation has OMCI(ONT management control and interface) mapping table for IP address and port number. That architecture is able to support per flow QoS(Quality of service) as well as QoS of NGN requirement. So that can improve the resource efficiency of QoS than the existing G-PON architecture.
차세대 광 가입자망에서 멀티캐스트 서비스 지원을 위한 핸드오버 기법
이영석(Young-suk Lee),이동수(Dong-soo Lee),김영한(Young-han Kim) 한국통신학회 2012 韓國通信學會論文誌 Vol.37 No.12(융합기술)
본 논문은 차세대 광가입자망(XG-PON1)에서 멀티캐스트 데이터의 끊김 없는 서비스가 가능한 핸드오버 기술을 제안한다. 이를 위해 기존 이동성 관리 프로토콜인 MIP(Mobile IP), FMIP(Fast MIP), HMIP(Heterogeneous MIP), PMIP(Proxy MIP)을 XG-PON1에 적용할 경우의 장단점을 분석하여 최적의 핸드오버 기술을 도출한다. 또한 멀티캐스트 핸드오버 기법에서 발생되는 터널 컨버젼스 문제점 해결을 위한 방안을 제안하고 분석한다. 본 논문에서 제안한 XG-PON1에서 멀티캐스트 지원 핸드오버 기술은 터널 컨버젼스 문제점을 해결하고 핸드오버 지연 및 패킷 전송 코스트를 감소시킨다. In this paper, we propose a handover scheme for seamless mobile multicast service in next generation access networks. For this, we drew optimum handover scheme when applying MIP(mobile IP), FMIP(Fast MIP), HMIP(Heterogeneous MIP), PMIP(Proxy MIP) to XG-PON1. And, we analyze handover scheme for seamless mobile multicast service in XG-PON1. The prosed handover scheme remove tunnel convergence and reduces handover delay, packet delivery cost.
이한협,Hee Yeal Rhy,이상수,이종현,정환석 한국전자통신연구원 2016 ETRI Journal Vol.38 No.1
A large incoherent crosstalk (IC) caused by amplified spontaneous emission (ASE) noise power from Tx-disabled optical network units and a differential path loss has been shown to degrade upstream transmission performance in time-division multiplexing passive optical networks. This paper considers the IC-induced power penalty of an upstream signal both in an XG-PON and in a TWDM-PON. We investigate the degradation of the extinction ratio and relative intensity noise through a simulation and experiments. For the XG-PON case, we observe a 9.6 dB difference in the level of ASE noise power from Tx-disabled ONUs (hereafter known simply as ASE noise) between our result and the ITU-T XG-PON PMD recommendation. We propose an optical filtering method to mitigate an IC-induced power penalty. In the TWDM-PON case, the IC-induced power penalty is naturally negligible because the ASE noise is filtered by a wavelength multiplexer at the optical line terminal. The results provide design guidelines for the level of ASE noise in both XG-PONs and TWDM-PONs.
Man Soo Han 보안공학연구지원센터 2015 International Journal of Software Engineering and Vol.9 No.8
An XG-PON (10-Gbps-capable passive optical network) system is comprised of an OLT (optical line termination) and multiple ONUs (optical network units). In general, ONUs report their requests to the OLT and then the OLT performs a dynamic bandwidth allocation operation to allocate non-overlapping transmission slots to ONUs. In this paper, we consider an XG-PON system that ONUs do not report their requests to. The OLT estimates the ONU status by monitoring the upstream bandwidth usage of the ONU. We propose a dynamic bandwidth allocation method for the XG-PON system in which ONUs do not report their reports. The proposed method allocates a bandwidth to an ONU only if the ONU has fully used its upstream slot. Also, the proposed method periodically allocates a probe bandwidth to an ONU to prevent service starvation. Using simulation, we evaluate the performance of the proposed method under balanced and unbalanced traffic.
Lee, Youngsuk,Lee, Dongsoo,Yoo, Hark,Kim, Youngsun,Kim, Younghan The Korea Institute of Information and Commucation 2013 Journal of communications and networks Vol.15 No.5
This paper proposes a broadcast software download (BSD) scheme for a 10-gigabit-capable passive optical network (XG-PON), which dramatically reduces the time required to update a remotely-located user terminal's software. The performance of the proposed BSD is examined by numerical analysis and demonstrated by experimental verification on our XG-PON test platforms. The results show that the BSD takes less than 5 minutes to update 45 user-terminal software, while the conventional unicast software download scheme normally takes more than one and half hours.
이영석,이동수,유학,김영선,김영한 한국통신학회 2013 Journal of communications and networks Vol.15 No.5
This paper proposes a broadcast software download(BSD) scheme for a 10-gigabit-capable passive optical network(XG-PON), which dramatically reduces the time required to updatea remotely-located user terminal’s software. The performanceof the proposed BSD is examined by numerical analysis anddemonstrated by experimental verification on our XG-PON testplatforms. The results show that the BSD takes less than 5 minutesto update 45 user-terminal software, while the conventionalunicast software download scheme normally takes more than oneand half hours.
Compact 2.5 Gb/s Burst-Mode Receiver with Optimum APD Gain for XG-PON1 and GPON Applications
Jongdeog Kim,Quan Le,Munseob Lee,Hark Yoo,Dong-Soo Lee,박창수 한국전자통신연구원 2009 ETRI Journal Vol.31 No.5
This letter presents a compact 2.5 Gb/s burst-mode receiver using the first reported monolithic amplifier IC developed with 0.25 μm SiGe BiCMOS technology. With optimum avalanche photodiode gain, the receiver module can obtain a fast response, high sensitivity and wide dynamic range, satisfying the overhead timing and various power specifications for a 2.5 Gb/s next-generation passive optical network (PON), as well as a legacy 1.25 Gb/s PON in the upstream.