GPON系统中ONU端的设计以及上行帧传输算法的研究
摘要
对高速Internet的接入和电信网络应用的需求,极大地促进了接入网络的发展。无源光网络(PON)技术适合宽带接入的需要,其最新技术——GPON被业内人士公认为是解决宽带接入网的最佳方案之一,目前正受到越来越多的重视。
本文简叙了光接入网的定义、参考配置、拓扑结构,介绍了对媒体接入控制(MAC)的要求,比较了PON的三种主流技术——APON、EPON和GPON的优缺点,详细分析了ONU端的体系结构图。本文的主要工作是负责GPON上行传输的调度分配算法设计和ONU端的TC适配子层的研究。
在传统动态带宽分配算法的基础上,本文提出了基于不同优先级业务的改进型带宽分配算法和根据不同业务类型的优先级和等待时间调度的上行成帧算法,并对这两种算法都分析了其有效性,进行了仿真。同时本文还详细介绍了所选择的物理层芯片,分析了TC适配子层中各模块的功能、设计与实现方法以及关键模块的验证,给出了整体联调的时序仿真结果。从波形仿真结果可以看出,模块的设计可以正确实现ONU的TC适配子层预定的逻辑功能。最后,对本文的工作和所得到的结论进行了总结。
The demand for accessing Internet with high speed and supporting telecommunication network applications has greatly accelerated the development of broadband access network. The Passive Optical Network (PON) technology fits the requirement to access broadly. The newly proposed technique --- GPON, has been publicly accepted by the insider as one of the most efficient and optimal method to resolve the broadband access network and now being paid more and more attention.
The issue gives a sketch of the definition of Optical Access Network with its reference configuration and topology structure, introduces the requirement of Media Access Control, compares the three main method of PON– APON, EPON and GPON with their advantage and disadvantage, analyzes the design of ONU system structure in details. This issue mainly focused on the research of GPON upstream transport schedule & distribution algorithm and design for TC adapting sub-layer of the ONU.
Based on the traditional Dynamic Bandwidth Assignment algorithm, the issue proposes an improved algorithm determined by different priorities’services and a new schedule method according to the priority and waiting time, then presents the analysis of the two algorithms about their validities and emulations, introduces the chip used for physical layer in details, discourses each module’s function of TC adapting sub-layer with its design and complementation, gives the key module into verification, presents the timing sequence modulation result of the whole structure. From the waveform, we can get the conclusion that the overall modules implement the ONU’s TC adapting sub-layer’s anticipated logic. Finally, creativeness and conclusions are summarized.
本文简叙了光接入网的定义、参考配置、拓扑结构,介绍了对媒体接入控制(MAC)的要求,比较了PON的三种主流技术——APON、EPON和GPON的优缺点,详细分析了ONU端的体系结构图。本文的主要工作是负责GPON上行传输的调度分配算法设计和ONU端的TC适配子层的研究。
在传统动态带宽分配算法的基础上,本文提出了基于不同优先级业务的改进型带宽分配算法和根据不同业务类型的优先级和等待时间调度的上行成帧算法,并对这两种算法都分析了其有效性,进行了仿真。同时本文还详细介绍了所选择的物理层芯片,分析了TC适配子层中各模块的功能、设计与实现方法以及关键模块的验证,给出了整体联调的时序仿真结果。从波形仿真结果可以看出,模块的设计可以正确实现ONU的TC适配子层预定的逻辑功能。最后,对本文的工作和所得到的结论进行了总结。
The demand for accessing Internet with high speed and supporting telecommunication network applications has greatly accelerated the development of broadband access network. The Passive Optical Network (PON) technology fits the requirement to access broadly. The newly proposed technique --- GPON, has been publicly accepted by the insider as one of the most efficient and optimal method to resolve the broadband access network and now being paid more and more attention.
The issue gives a sketch of the definition of Optical Access Network with its reference configuration and topology structure, introduces the requirement of Media Access Control, compares the three main method of PON– APON, EPON and GPON with their advantage and disadvantage, analyzes the design of ONU system structure in details. This issue mainly focused on the research of GPON upstream transport schedule & distribution algorithm and design for TC adapting sub-layer of the ONU.
Based on the traditional Dynamic Bandwidth Assignment algorithm, the issue proposes an improved algorithm determined by different priorities’services and a new schedule method according to the priority and waiting time, then presents the analysis of the two algorithms about their validities and emulations, introduces the chip used for physical layer in details, discourses each module’s function of TC adapting sub-layer with its design and complementation, gives the key module into verification, presents the timing sequence modulation result of the whole structure. From the waveform, we can get the conclusion that the overall modules implement the ONU’s TC adapting sub-layer’s anticipated logic. Finally, creativeness and conclusions are summarized.
引文
[1] 王秉钧,王少毅. 接入网技术. 北京:机械工业出版社,2005:1~8
[2] 余景文. GPON 技术的研究. 电信网技术. 2004,11:7~10
[3] 徐伟亮,李俊. GPON:最新一代无源光网络. 山东通信技术. 2003,12:37～39
[4] 聂祥. 探讨宽带接入技术的应用现状与发展. 江西通信科技. 2005,3:24～26
[5] 吴斌. 试析 IPTV 在中国的发展现状和前景. 贵州大学学报(社会科学版). 2005,9:118～121
[6] 陈志钢. FTTH:我国光通信市场的下一个增长点. 通讯世界. 2004,6:64
[7] 谢松. GPON 技术在中国运营商市场的应用方式浅析. 电信网技术. 2005,11:7～10
[8] Vitesse Semiconductor Corporation. VSC7139 Datasheet,Quad Transceiver for Gigabit Ethernet and Fibre Channel. Rev 4.0,2003.1～18
[9] Broadlight Company.GPON solution. http://www.broadlight.com/pageContainer.asp?targetCat=57
[10] Using GPON to Bulid A Broadband Access network[pdf]. http://www.flexlight-networks.com/files/latest32005329.pdf
[11] ITU-T Recommendation G.984.1-200303(Prepublished) .General characteristics for Gigabit-capable Passive Optical Networks(GPON):7~9
[12] ITU-T Recommendation G.984.2-200303(Prepublished) .Gigabit-capable passive optical networks(GPON):Physical media dependent(PMD) layer specification. Feb 2004, 8~12
[13] 陶智勇.GPON 标准符合消费者需求.中国电子报.2006
[14] W.Richard Stevens.TCP/IP 详解,卷 1:协议.范建华等译.北京:机械工业出版社.2000:24～26
[15] 霍冠英,邱智亮. GFP 的引入与 GPON 标准的形成. 中国数据通信. 2003,11:92～97
[16] ITU-T Recommendation G.7041. Generic framing procedure (GFP)[S]. 2002:195～200
[17] ITU-T Recommendation G.984.3-200402-I. Gigabit-capable Passive Optical Network(G-PON):Transmission Convergence Layer Specification. Feb 2004:102～110
[18] 胡春琳. 三种宽带无源光网络接入网技术比较. 光通信研究. 2004,5:27~29
[19] 王卓,黄启睿,罗志祥等. GPON 系统中面向业务的上行调度成帧算法. 光通信技术. 2006,6:12~14
[20] D.Angelopoulos. Efficient transport of packets with QoS in an FSAN-aligned GPON. IEEE Commu.Mag.. Feb 2004:92~98.
[21] Braden B,Clark D,Crowcroft. Recommendations on Queue Management and congestion Avoidance in the Internet. RFC 2309,1998,4:67~69
[22] Rong Pan , CHOKe. A Stateless Active Queue Management Scheme for Approximating Fair Bandwidth Allocation. IEEE INFOCOM 2000 Vol.34:233～235
[23] J.D.Angelopoulos. Efficient transport of packets with QoS in an FSAN-aligned GPON. IEEE Commu.Mag.. Feb 2004:92~98
[24] Shin-ichi YOSHIHARA.. A Dynamic Bandwidth Assignment Algorithm for B-PON. 0-7803-7632-3/02 @2002 IEEE.
[25] M.Yoshino,S.Yoshihara,H.Ueda. DBA Function for Broadband Passive Optical Network Systems. OHAN/FSAN 2001,Yokohama,Japan,Apr 2001
[26] H.Mukai , S.Kozaki , K.Koguchi , T.Yokotani , H.Ichibangase. Evaluation of GEM-PON system using Dynamic Bandwidth Assignment. OHAN/FSAN 2001,Yokohama,Japan,Apr 2001
[27] M.Umayabashi,K.Takagi,M.Shibutani,S.Harada,H.Nakaishi. Efficient Dynamic Bandwidth Assignment for GEM-PON Systems Using Virtual Queue Scheme. OHAN/FSAN 2001,Yokohama,Japan,Apr 2001:144
[28] M.Yoshino,S.Yoshihara,H.Ueda. Realizing Fine Granularity for B-PON DynamicBandwidth Assignment. CQR 2002,Okinawa,Japan,May 2002
[29] 杜凯. 基于 FPGA 的 GFP 成帧协议实现. 通信及网络元器件. 2004,11:25~27
[30] 贺鹏飞,吕英华,王野秋,吴晓君,李岩. 百兆 EPON 系统的 FPGA 设计. 光通信技术,2004,09:15~17
[31] 朱增喜,林如俭,叶家骏. EPON MAC 层的研究及 ONU MAC 的 FPGA 实现. 上海大学学报(自然科学版),2004,10(5):25~27
[32] Vitesse Semiconductor Corporation. VSC8142 Datasheet:1~15
[33] Altera Corporation. Application Note AN-207,TriMatrix Memory Selection Using the Quartus II Software.Rev 2.1,2002.1～13
[34] Altera Corporation.Application Note AN-116,Configuring SRAM-Based LUT Devices.Rev 2.0,2001.1～19
[35] 夏宇闻. Verilog 数字系统设计教程.第 2 版. 北京:北京航空航天大学出版社,2003:122～128
[36] Byeong Gi Lee,Seok chang Kim. Recent advances in theory and applications of scrambling techniques for digital transmission. Proc.IEEE,1995,83(10):1399～1406
[37] Sait S M,Hasan W. Hardware Design and VLSI Implementation of a Byte-wise CRC Generator Chip. IEEE Transactions on consumer Electronics,1995,41(2):195～200
[38] Richard F H,Cheung K L. High-Performance CMOS 32-Bit Parallel CRC Engine. IEEE Journal of Solid-State Circuits,1999,Vol.34:233～235
[39] 柯炜,殷奎喜. 一种 BCH 码的新型译码方法及其 FPGA 器件实现. 电讯技术,2004,Vol.02(124):58～61
[40] 樊昌信,李甫翊,徐炳祥等. 通信原理. 第 5 版. 北京:国防工业出版社,2002.287～291
[2] 余景文. GPON 技术的研究. 电信网技术. 2004,11:7~10
[3] 徐伟亮,李俊. GPON:最新一代无源光网络. 山东通信技术. 2003,12:37～39
[4] 聂祥. 探讨宽带接入技术的应用现状与发展. 江西通信科技. 2005,3:24～26
[5] 吴斌. 试析 IPTV 在中国的发展现状和前景. 贵州大学学报(社会科学版). 2005,9:118～121
[6] 陈志钢. FTTH:我国光通信市场的下一个增长点. 通讯世界. 2004,6:64
[7] 谢松. GPON 技术在中国运营商市场的应用方式浅析. 电信网技术. 2005,11:7～10
[8] Vitesse Semiconductor Corporation. VSC7139 Datasheet,Quad Transceiver for Gigabit Ethernet and Fibre Channel. Rev 4.0,2003.1～18
[9] Broadlight Company.GPON solution. http://www.broadlight.com/pageContainer.asp?targetCat=57
[10] Using GPON to Bulid A Broadband Access network[pdf]. http://www.flexlight-networks.com/files/latest32005329.pdf
[11] ITU-T Recommendation G.984.1-200303(Prepublished) .General characteristics for Gigabit-capable Passive Optical Networks(GPON):7~9
[12] ITU-T Recommendation G.984.2-200303(Prepublished) .Gigabit-capable passive optical networks(GPON):Physical media dependent(PMD) layer specification. Feb 2004, 8~12
[13] 陶智勇.GPON 标准符合消费者需求.中国电子报.2006
[14] W.Richard Stevens.TCP/IP 详解,卷 1:协议.范建华等译.北京:机械工业出版社.2000:24～26
[15] 霍冠英,邱智亮. GFP 的引入与 GPON 标准的形成. 中国数据通信. 2003,11:92～97
[16] ITU-T Recommendation G.7041. Generic framing procedure (GFP)[S]. 2002:195～200
[17] ITU-T Recommendation G.984.3-200402-I. Gigabit-capable Passive Optical Network(G-PON):Transmission Convergence Layer Specification. Feb 2004:102～110
[18] 胡春琳. 三种宽带无源光网络接入网技术比较. 光通信研究. 2004,5:27~29
[19] 王卓,黄启睿,罗志祥等. GPON 系统中面向业务的上行调度成帧算法. 光通信技术. 2006,6:12~14
[20] D.Angelopoulos. Efficient transport of packets with QoS in an FSAN-aligned GPON. IEEE Commu.Mag.. Feb 2004:92~98.
[21] Braden B,Clark D,Crowcroft. Recommendations on Queue Management and congestion Avoidance in the Internet. RFC 2309,1998,4:67~69
[22] Rong Pan , CHOKe. A Stateless Active Queue Management Scheme for Approximating Fair Bandwidth Allocation. IEEE INFOCOM 2000 Vol.34:233～235
[23] J.D.Angelopoulos. Efficient transport of packets with QoS in an FSAN-aligned GPON. IEEE Commu.Mag.. Feb 2004:92~98
[24] Shin-ichi YOSHIHARA.. A Dynamic Bandwidth Assignment Algorithm for B-PON. 0-7803-7632-3/02 @2002 IEEE.
[25] M.Yoshino,S.Yoshihara,H.Ueda. DBA Function for Broadband Passive Optical Network Systems. OHAN/FSAN 2001,Yokohama,Japan,Apr 2001
[26] H.Mukai , S.Kozaki , K.Koguchi , T.Yokotani , H.Ichibangase. Evaluation of GEM-PON system using Dynamic Bandwidth Assignment. OHAN/FSAN 2001,Yokohama,Japan,Apr 2001
[27] M.Umayabashi,K.Takagi,M.Shibutani,S.Harada,H.Nakaishi. Efficient Dynamic Bandwidth Assignment for GEM-PON Systems Using Virtual Queue Scheme. OHAN/FSAN 2001,Yokohama,Japan,Apr 2001:144
[28] M.Yoshino,S.Yoshihara,H.Ueda. Realizing Fine Granularity for B-PON DynamicBandwidth Assignment. CQR 2002,Okinawa,Japan,May 2002
[29] 杜凯. 基于 FPGA 的 GFP 成帧协议实现. 通信及网络元器件. 2004,11:25~27
[30] 贺鹏飞,吕英华,王野秋,吴晓君,李岩. 百兆 EPON 系统的 FPGA 设计. 光通信技术,2004,09:15~17
[31] 朱增喜,林如俭,叶家骏. EPON MAC 层的研究及 ONU MAC 的 FPGA 实现. 上海大学学报(自然科学版),2004,10(5):25~27
[32] Vitesse Semiconductor Corporation. VSC8142 Datasheet:1~15
[33] Altera Corporation. Application Note AN-207,TriMatrix Memory Selection Using the Quartus II Software.Rev 2.1,2002.1～13
[34] Altera Corporation.Application Note AN-116,Configuring SRAM-Based LUT Devices.Rev 2.0,2001.1～19
[35] 夏宇闻. Verilog 数字系统设计教程.第 2 版. 北京:北京航空航天大学出版社,2003:122～128
[36] Byeong Gi Lee,Seok chang Kim. Recent advances in theory and applications of scrambling techniques for digital transmission. Proc.IEEE,1995,83(10):1399～1406
[37] Sait S M,Hasan W. Hardware Design and VLSI Implementation of a Byte-wise CRC Generator Chip. IEEE Transactions on consumer Electronics,1995,41(2):195～200
[38] Richard F H,Cheung K L. High-Performance CMOS 32-Bit Parallel CRC Engine. IEEE Journal of Solid-State Circuits,1999,Vol.34:233～235
[39] 柯炜,殷奎喜. 一种 BCH 码的新型译码方法及其 FPGA 器件实现. 电讯技术,2004,Vol.02(124):58～61
[40] 樊昌信,李甫翊,徐炳祥等. 通信原理. 第 5 版. 北京:国防工业出版社,2002.287～291