近年來,全球的互聯(lián)網(wǎng)用戶數(shù)目持續(xù)增加,大量的新興高速數(shù)據(jù)業(yè)務(wù)也不斷涌現(xiàn),包括云存儲(chǔ)、云計(jì)算、高清電視、網(wǎng)絡(luò)游戲、視頻廣播、視頻會(huì)議和云文件共享等。因此學(xué)術(shù)界和工業(yè)界一直在不斷探索部署吉比特帶寬的網(wǎng)絡(luò)設(shè)施來滿足用戶需求。無源光網(wǎng)絡(luò)(Passive Optical Networks,PON)以其大容量、高覆蓋、低成本的優(yōu)勢(shì)成為接入網(wǎng)中最主要也極具發(fā)展前景的解決方案。為了實(shí)現(xiàn)PON系統(tǒng)速率繼續(xù)升級(jí),電信兩大標(biāo)準(zhǔn)組織IEEE和ITU-T分別開始討論NG-EPON和XGS-PON的標(biāo)準(zhǔn)。本文研究NG-EPON。NG-EPON采用單波長(zhǎng)25Gbps,四個(gè)波長(zhǎng)復(fù)用的方式實(shí)現(xiàn)100Gbps容量,并有巨大的潛力去支持第五代移動(dòng)通信的回傳前傳等業(yè)務(wù)。與之前的PON系統(tǒng)不同的是,NG-EPON中每個(gè)光網(wǎng)絡(luò)單元(Optical Network Unit ONU)可以同時(shí)在一個(gè)或多個(gè)波長(zhǎng)上傳送數(shù)據(jù),這引發(fā)了許多新的問題,例如帶寬資源的優(yōu)化,波長(zhǎng)分配的數(shù)量和機(jī)制,亂序幀問題。因此NG-EPON系統(tǒng)需要設(shè)計(jì)一個(gè)高效的帶寬以及波長(zhǎng)資源管理的機(jī)制。針對(duì)EPON和10G-EPON中動(dòng)態(tài)帶寬分配(Dynamic Bandw...

【文章頁(yè)數(shù)】：132 頁(yè)

【學(xué)位級(jí)別】：博士

【文章目錄】：
摘要
ABSTRACT
1. INTRODUCTION
    1.1 GLOBAL TRAFFIC TRENDS
    1.2 NEED OF PONS
    1.3 EVOLUTION OF PON TOWARDS NG-EPON
        1.3.1 PON Standards
        1.3.2 EPON Standards
        1.3.3 10G-EPON
        1.3.4 NG-EPON
    1.4 ANALYSIS OF DBA IN NG-EPON
        1.4.1 Grant Scheduling Framework
        1.4.2 Grant Sizing Policy
        1.4.3 Grant Scheduling Policy
        1.4.4 Related Work
            1.4.4.1 IPACT DBA
            1.4.4.2 EFT-DBA
            1.4.4.3 Water-Filling DBA
    1.5 MOTIVATION OF OUR RESEARCH WORK
        1.5.1 DBA Related Problems
        1.5.2 Our Goals
    1.6 SUMMARY OF CHAPTER
2. SOLUTION FOR RESEQUENCING PROBLEM IN NG-EPON
    2.1 SCHEDULING ARCHITECTURE OF NG-EPON
    2.2 MPCP IN NG-EPON
    2.3 QUEUE HANDLING AT ONU IN NG-EPON
    2.4 PROBLEM STATEMENT
        2.4.1 Frame Size Mismatching Problem
        2.4.2 Frame Resequencing Delay Problem
    2.5 RESEQUENCING DELAY IN MODIFIED-IPACT AND WF-DBA
    2.6 PROPOSED DBA FOR RESEQUENCING PROBLEM IN NG-EPON
        2.6.1 First-Fit DBA Algorithm
    2.7 IN-DEPTH ANALYSIS OF PROPOSED SOLUTION
    2.8 SUMMARY OF CHAPTER
3. FLEXIBLE RESOURCE MANAGEMENT IN NG-EPON
    3.1 PROBLEM STATEMENT
    3.2 FLEXIBLE RESOURCE MANAGEMENT IN NG-EPON AND RELATED WORK
        3.2.1 Flexible Resource Management using Modified-IPACT
        3.2.2 Flexible Resource Management using First-Fit DBA
        3.2.3 Flexible Resource management using Water-Filling DBA
        3.2.4 Performance Comparison between First-Fit DBA and WF-DBA
        3.2.5 Flexible Resource Management using WF-DBA in Limited Access Mode
    3.3 PROPOSED DBA FOR FLEXIBLE RESOURCE MANAGEMENT
        3.3.1 Flexible Wavelength DBA Algorithm
    3.4 IN-DEPTH ANALYSIS OF PROPOSED SOLUTION
        3.4.1 Impact of network and ONUs parameters on the Proposed Solution
        3.4.2 Impact of number of ONUs in the network
    3.5 SUMMARY OF CHAPTER
4. PERFORMANCE EVALUATION
    4.1 SIMULATION ENVIRONMENT
    4.2 TRAFFIC MODEL
    4.3 PERFORMANCE EVALUATION OF FF-DBA
        4.3.1 Average Packet Delay
        4.3.2 Reduction in bandwidth wastage due to guard time
        4.3.3 Frame resequencing Delay Analysis
        4.3.4 Jitter Analysis
        4.3.5 Average Packet Drop Ratio
        4.3.6 Channel Utilization Analysis
        4.3.7 Grant Utilization Analysis
    4.4 PERFORMANCE EVALUATION OF FW-DBA
        4.4.1 Average Packet Delay
        4.4.2 Flexible number of wavelengths allocation
        4.4.3 Reduction in bandwidth wastage due to guard time
        4.4.4 Grant Utilization Analysis
        4.4.5 Jitter Analysis
        4.4.6 Comparison of all DBA algorithms in terms of Frame Resequencing Delay
        4.4.7 Relation between number of ONUs in the Network and Optimal value of alpha
    4.5 SUMMARY OF CHAPTER
5. FURTHER DISCUSSION AND CONCLUSION
    5.1 FIRST-FIT DBA
    5.2 FLEXIBLE WAVELENGTH DBA
    5.3 CONCLUSION
REFERENCES
APPENDIX
    A. LIST OF PUBLICATIONS
    B. LIST OF ACRONYM
    C. RESEARCH PROJECTS
ACKNOWLEDGEMENTS



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