Ethernet passive optical networks performance optimization. An extensive comparative study for DBA algorithms: Passive Optical NetworkGRIN Verlag, 01/09/2021 - 113 من الصفحات Master's Thesis from the year 2021 in the subject Engineering - Communication Technology, grade: 3.3, , course: Optical Fibers, language: English, abstract: This thesis provides a detailed comparison and a classification study for a large number of DBA algorithms with respect to time delay and throughput as performance indicators. The study shows that IPACT WITH CBR, UDBA, IPACT with two stages and CPBA are the optimum DBA algorithms regarding both time delay and throughput at highly loaded scenarios. Dynamic bandwidth allocation in Ethernet passive optical networks (EPON) presents a key issue for providing efficient and fair utilization of the EPON upstream bandwidth while supporting the quality of service QoS requirements of different traffic classes. Rare literatures have addressed a qualitative and quantitative comparison of large numbers of DBA algorithms based on their performance indicators. These algorithms are enrolled in a parametric optimization process targeting performance enhancement at highly loaded scenarios this increasing upstream line rates, changing distance between the OLT (Optical Line Terminal) and ONU (Optical Network Unit), increasing size of an Ethernet packet and changing maximum cycle time to 1 ms and altering guard time value). This process reduces time delay around 3.5% for IPACT WITH CBR, 1.725% for UDBA, 1.167% for IPACT with two stages and (1.167% for CPBA. Also, the optimization increases the throughput by 1.3% for IPACT WITH CBR, 1.795% in UDBA, 2.5% for IPACT with two stages and 1.684% for CPBA. |
المحتوى
INTRODUCTION | 1 |
BASIC MODEL AND ANALYSIS | 33 |
RESULTS AND DISCUSSIONS | 50 |
CONCLUSION AND FUTURE WORK | 87 |
طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
access network ADBA allocation scheme Arishtat bandwidth demand bytes CBR credit CDBA Comparison between different couplers CPBA CPBA-SLA CSMA/CD DBA algorithms Delay DBA-APC delay and throughput delay are summarized delay at different different DBA algorithms different offered load differentiated services Digital Subscriber Line downstream DSLAM dynamic bandwidth allocation e-DBA EBDBA EPON Ethernet passive optical FSAN FSD-SLA function of offered fuzzy logic Gbits/s granted IEEE IFLDBA intra ONU allocation IPACT with CBR Journal of Optical Limited Service IPACT line rates loaded ONUs main values obtained minimum guaranteed bandwidth n-DBA Obtained simulation result Obtained throughput Obtained time delay Offered Load Gbps optical fiber optical splitters passive optical networks polling cycle Present simulation REPORT messages requested bandwidth SDBA simulations parameters slot STAGE QUEUE statistical multiplexing strict priority scheduling summarized in table throughput at different throughput performance timeslot TLBA topology transmit UDBA wavelength YDBA zoom in range الخوارزميات