Journal of Optical Networking最新文献_第2页

Optically amplified passive optical networks : a power budget analysis 光放大无源光网络:功率预算分析

Journal of Optical Networking Pub Date : 2009-04-01 DOI: 10.1364/JON.8.000370

C. Michie, A. Kelly, J. Mcgeough, S. Karagiannopoulos, Ivan Andonovic

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引用次数: 22

Comparison of collision avoidance mechanisms for the discovery process in xPON xPON中发现过程的避碰机制比较

Journal of Optical Networking Pub Date : 2009-04-01 DOI: 10.1364/JON.8.000317

M. Hajduczenia, H. Silva

{"title":"Comparison of collision avoidance mechanisms for the discovery process in xPON","authors":"M. Hajduczenia, H. Silva","doi":"10.1364/JON.8.000317","DOIUrl":"https://doi.org/10.1364/JON.8.000317","url":null,"abstract":"Operation of all time division multiple access passive optical networks (PONs), regardless of the layer 2 protocol in use, requires the utilization of the so-called discovery process allowing for identification and registration of newly activated optical network units (ONUs). For the duration of the discovery process, all transmissions from already registered ONUs are halted, decreasing the available upstream bandwidth. The number of discovery windows required to successfully register all contending ONUs depends on the collision probability for their registration requests. To decrease such a collision probability for registration requests, several types of collision avoidance mechanisms (CAMs) can be used in various flavors of passive optical network (xPON), as we examine in more detail. A random delay mechanism (RDM) is typically exploited in 1 Gbit/s Ethernet PON (1G-EPON) and gigabit PON (GPON), though other CAMs are also available. It is our goal therefore to examine the efficiency of all known CAMs, compare them in quantitative and qualitative manner, and recommend the best mechanism for the next generation of xPON systems, minimizing the average number of discovery cycles required to register contending ONUs (maximizing thus the registration success probability). The results indicate that RDM is indeed the best of simple, single-stage CAMs available, thus confirming the choice of both the P802.3ah Task Force (TF) and Full Service Access Network (FSAN)/ITU-T at the time when their respective 1G-EPON and GPON specifications were written.","PeriodicalId":49154,"journal":{"name":"Journal of Optical Networking","volume":"8 1","pages":"317-336"},"PeriodicalIF":0.0,"publicationDate":"2009-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1364/JON.8.000317","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66593470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Multiconstraints fuzzy-logic-based scheduling algorithm for passive optical networks 无源光网络的多约束模糊逻辑调度算法

Journal of Optical Networking Pub Date : 2009-04-01 DOI: 10.1364/JON.8.000346

R. Razavi, K. Guild

{"title":"Multiconstraints fuzzy-logic-based scheduling algorithm for passive optical networks","authors":"R. Razavi, K. Guild","doi":"10.1364/JON.8.000346","DOIUrl":"https://doi.org/10.1364/JON.8.000346","url":null,"abstract":"Presented is a fuzzy-logic-based scheduling algorithm for passive optical networks (PONs) that considers four different metrics to allocate an upstream bandwidth to optical network units (ONUs). The metrics considered are the delay of the head-of-the-line packets at the ONUs, the importance level of the packets, the relative ONU's buffer fullness, and the level of the power fluctuation from one ONU to another. One of the advantages of a fuzzy controller is the fact that, regardless of the design complexity, the controller can be implemented as a simple look-up table, which makes it ideal for high-speed operation. Further facilitation of implementation was achieved by realization of the fuzzy algorithm through a two-stage hierarchal architecture. Moreover, linear predictive filters have been used to predict the traffic arrival rate and the packet delay at the ONUs. Compared with the round-robin scheduling algorithm, the results show significant performance improvement in terms of the overall packets delay as well as jitter when the proposed algorithm in employed. Furthermore, using this algorithm would reduce the average level of power fluctuations in a PON system and will also provide high-level service differentiation between packets of different importance.","PeriodicalId":49154,"journal":{"name":"Journal of Optical Networking","volume":"8 1","pages":"346-357"},"PeriodicalIF":0.0,"publicationDate":"2009-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1364/JON.8.000346","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66593053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Online excess bandwidth distribution for Ethernet passive optical networks 以太网无源光网络的在线剩余带宽分配

Journal of Optical Networking Pub Date : 2009-04-01 DOI: 10.1364/JON.8.000358

Jason R. Ferguson, M. Reisslein, M. Mcgarry

引用次数: 24

Bandwidth and delay guaranteed polling with adaptive cycle time (BDGPACT): a scheme for providing bandwidth and delay guarantees in passive optical networks 具有自适应周期时间的保证带宽和延迟的轮询(BDGPACT):一种在无源光网络中提供带宽和延迟保证的方案

Journal of Optical Networking Pub Date : 2009-04-01 DOI: 10.1364/JON.8.000337

T. Berisa, A. Bazant, V. Mikac

引用次数: 11

Light-path establishment with PID control for effective wavelength utilization in all-optical wavelength-division multiplexing networks 全光波分复用网络中有效利用波长的PID控制光路建立

Journal of Optical Networking Pub Date : 2009-04-01 DOI: 10.1364/JON.8.000383

T. Tachibana, Kenji Sugimoto