• Title/Summary/Keyword: PON(passive optical network)

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Design and Performance Evaluation of G.983.1 based on Dynamic MAC Protocol for ATM-PON (ATM-PON에서 G.983.1을 이용한 Dynamic MAC Protocol의 설계 및 성능 평가)

  • 장성호;장종욱;이대봉;노태곤
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2001.10a
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    • pp.353-356
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    • 2001
  • Earlier efforts on optical access concentrated on the design of PONs for the collection and distribution portion of the access network. PON architecture is very simple but it requires MAC protocol for control of upstream traffic. This paper proposes a MAC protocol for a broadband access network using an ATM Passive Optical Network supporting CBR/rtVBR, nrtVBR, UBR and ABR traffic. For the proposed MAC scheme, we present grant field format, minislot format, and bandwidth allocation algorithm. from the simulation result, we have confirmed that our proposed scheme ran reduce the average tell delay in comparison to that of conventional MAC schemes.

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A New Dynamic Bandwidth Assigmnent Algorithm for Ethernet-PON (Ethernet-PON을 위한 새로운 동적 대역 할당 알고리즘)

  • Jang, Seong-Ho;Jang, Jong-Wook
    • The KIPS Transactions:PartC
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    • v.10C no.4
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    • pp.441-446
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    • 2003
  • Earlier efforts on optical access concentrated on the design of PONs for the collection and distribution portion of the access network. The PON architecture is very simple but it requires a MAC protocol for control of upstream traffic. The MAC protocol must support QoS (Quality of Service) administration function by various traffic class, efficient dynamic bandwidth assignment function, CDV (Ceil Delay Variation) minimization function etc. This paper proposes a dynamic bandwidth assignment algorithm of the MAC protocol for a broadband access network using an Ethernet Passive Optical Network supporting various traffic class. We compare our proposed with MDRR algorithm using simulation, and confirmed that our proposed Request-Counter algorithm produces shorter average cell delay.

A Low Noise Broadband Light Source and its Application on WDM-PON (저잡음 특성의 광대역 비간섭성 광원과 파장 분할 다중방식 수동형 광가입자망에의 응용)

  • Choi Ki-Man;Moon Jung-Hyung;Lee Chang-Hee
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.43 no.5 s.347
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    • pp.68-76
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    • 2006
  • We propose a low noise broadband light source (BLS) and investigate a cost-effective wavelength division multiplexing-passive optical network (WDM-PON) for the convergence of broadcasting and data service. The proposed BLS is used for an injection light of wavelength-locked Fabry-Perot laser diodes (F-P LD) and helps the color-free operation of dense WDM-PON (DWDM-PON). In addition, we apply this BLS to a optical source for overlay of digital broadcasting channel on the WDM-PON.

Protection/Restoration of PON Systems Using WDM based 2-OLT Structure (WDM 기반 2-OLT 구조를 이용한 PON 시스템 보호 및 절체)

  • Rawshan, Fahmida;Park, Youngil
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.37B no.12
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    • pp.1168-1173
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    • 2012
  • In this paper, we propose a protection architecture of passive optical network (PON) system by using two optical line terminals (OLTs). Using this scheme, the network can sustain services to access area and restores normal operation in faulty conditions. Unlike existing systems, the proposed one increases the efficiency of the system by operating both OLTs using different wavelengths in normal condition. During protection mode, a Shared-bandwidth allocation scheme is employed to maximize the utilization efficiency. Performance analysis shows that the proposed scheme can provide reliability to Ethernet-based PON system very efficiently.

Study of ONU Buffer Size For Ethernet PON Using OPNET Simulation Tool (OPNET 시뮬레이션 도구를 이용한 Ethernet PON의 ONU 버퍼 크기에 대한 연구)

  • 윤상원;장용석;엄종훈;김승호
    • Proceedings of the Korean Information Science Society Conference
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    • 2002.04a
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    • pp.172-174
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    • 2002
  • Ethernet PON(Passive Optical Network)은 최근 들어 활발하게 연구되고 있는 경제적이고 효율적인 가입자망 구조이다. 본 논문에서는 OPNET 시뮬레이션 도구를 사용하여 Ethernet PON 시뮬레이션 모델을 구현하고, 시뮬레이션 한다. OLT(Optical Line Termination)에 연결되는 ONU(Optical Network Unit)의 개수, 트래픽 및 네트워크 파라미터에 대한 ONU의 버퍼 크기(buffer size)를 분석하고, 이 결과로서 실제 네트워크에 적용할 효율적이고 적정한 ONU의 버퍼 크기를 제안한다.

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Performance Evaluation of Caching in PON-based 5G Fronthaul (PON기반 5G 프론트홀의 캐싱 성능 평가)

  • Jung, Bokrae
    • Journal of Convergence for Information Technology
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    • v.10 no.1
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    • pp.22-27
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    • 2020
  • With the deployment of 5G infrastructure, content delivery network (CDN) will be a key role to provide explosive growing services for the independent media and YouTube which contain high-speed mobile contents. Without a local cache, the mobile backhaul and fronthaul should endure huge burden of bandwidth request for users as the increase number of direct accesses from contents providers. To deal with this issue, this paper fist presents both fronthaul solutions for CDN that use dark fibers and a passive optical network (PON). On top of that, we propose the aggregated content request specialized for PON caching and evaluate and compare its performance to legacy schemes through the simulation. The proposed PON caching scheme can reduce average access time of up to 0.5 seconds, 1/n received request packets, and save 60% of backhaul bandwidth compared to the no caching scheme. This work can be a useful reference for service providers and will be extended to further improve the hit ratio of cache in the future.

Improvement of GPON MAC Protocol for IP TV Service (IPTV 서비스를 위한 GPON 핵심 MAC 기술 개발)

  • Lee, Seung-Kun;Jang, Jong-Wook;Bae, Moon-Han
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2008.05a
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    • pp.51-54
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    • 2008
  • PON(Passive Optical Network) is the promising technology applicable to TPS(Triple Play Service). To improve process the packet, MAC(Multiple Access Control) is the most important technology in the PON. The core of MAC is DBA(Dynamic Bandwidth Assignment), it classifies SR-DBA(Status Report DBA) and NSR-DBA(Non Status Report DBA). But GPON DBA is using BPON's DBA, so it's bad in network efficiency. This study develop BR(Borrow-Refund)-DBA for improve network efficiency and prompt process. For take the gauge of performance evaluation, estimate about throughput, fairness and queue delay in SR-DBA and NSR-DBA environment

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Design and Implementation of Dynamic TDMA MAC Protocol for Ethernet PON Using OPNET (OPNET을 이용한 Ethernet PON에서의 동적 TDMA MAC 프로토콜의 설계 및 구현)

  • 정상원;장용석;엄종훈;김승호
    • Proceedings of the Korean Information Science Society Conference
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    • 2002.04a
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    • pp.175-177
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    • 2002
  • Ethernet PON(Passive Optical Network)의 핵심 기술 충의 하나인 MAC(Media Access Control) 프로토콜은 ONU(Optical Network Unit)들이 상향으로 트래픽을 전송할 때 공유되어 있는 링크상의 충돌을 방지하고, 효율적인 대역폭을 할당하기 위만 스케줄링 알고리즘을 포함하고 있다. 본 논문에서는 차세대 가입자 망인 Ethernet PON의 성능을 최대화하기 위해, 가입자 망의 특성을 고려만 동적 슬롯 할당 TDHA(Time Division Multiple Access) 방식의 MAC 프로토콜을 제안한단. 이를 검증하기 위하여 OPNET 시뮬레이션 도구를 이용해 Ethernet PON 모델을 설계하고 시뮬레이션 한다.

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A Study of VLAN Service Architecture in Ethernet Passive Optical Network (E-PON 기반 광가입자망에서의 VLAN 서비스 제공 구조 연구)

  • Yoon, Hyeon-Sik;Lee, Jae-Heum;Yang, Sun-Hee
    • Annual Conference of KIPS
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    • 2003.11b
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    • pp.1257-1260
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    • 2003
  • 초고속 인터넷 서비스가 보급된 이후 가입자들은 점점더 많은 서비스를 요구하게 되고, 이에 따라 더 많은 대역폭을 필요로 하게 되었다. 저렴한 비용으로 사용자들의 요구 사항을 충족시킬 수 있는 방안으로 E-PON(Ethernet-Passive Optical Network) 기반의 광가입자망에 대한 관심이 증가하고 있다. 이에 본 논문에서는 E-PON 기반 광가입자망의 핵심적인 구성 요소인 eOLT(enhanced Optical Line Termination) 시스템에서의 VLAN(Virtual Local Area Network) 서비스 요구 사항 및 제공 구조를 제시 하고자 한다.

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A Design and Implementation of Integrated MAC Protocol with SR/NSR-ONU supporting the burst traffic over ATM-PON (ATM-PON에서 버스트 트래픽을 지원하는 SR/NSR 다중 모드 MAC Protocol 설계 및 구현)

  • Jang, Seong-Ho;Jang, Jong-Woo
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.28 no.1B
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    • pp.18-26
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    • 2003
  • Earlier efforts on optical access concentrated on the design of PONs for the collection and distribution portion of the access network PON architecture is very simple but it requires MAC protocol for control of upstream traffic This paper proposes a Request-Counter MAC protocol for a broadband access network using an ATM Passive Optical Network supporting CBR/rtVBR, nrtVBR, UBR and ABR traffic For the proposed MAC scheme, we present Grant Field format, Minislot format, and bandwidth allocation algorithm From the simulation result, we have confirmed that our proposed scheme can reduce the average cell delay in comparison to that of conventional MAC schemes.