Ethernet passive optical networks performance optimization. An extensive comparative study for DBA algorithms: Passive Optical Network
GRIN 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.
BASIC MODEL AND ANALYSIS
طبعات أخرى - عرض جميع المقتطفات
access network according adaptive allows bits bytes CDBA channel collision combined Communications Comparison between different couplers CPBA cycle delay delay at different demand different DBA algorithms different offered load direction distance downstream dynamic bandwidth allocation EBDBA EPON Ethernet passive optical excessive bandwidth fiber Figure frames function of offered Gbps granted guard IEEE IFLDBA increase IPACT with CBR Journal Limited main values obtained maximum mechanism method multiple Obtained Obtained simulation result Obtained throughput ONUs operation optimization packet parameters passive optical networks performance polling prediction Present simulation priority scheduling proposed queue range rates receiver reduce reference REPORT request requires scheme shared signal slot solution stage standard subscribers summarized in table support QoS throughput throughput at different TLBA traffic transmission transmit UDBA upstream values wavelength window