Optimized Dynamic Bandwidth Allocation Algorithm for Optical Access Networks

Abstract

Bandwidth assignment is a key issue in optical access networks, so an efficient mechanism is required for dynamic distribution of limited resources in the uplink channel among competing subscriber optical network units (ONUs). This paper presents a novel optimized dynamic bandwidth allocation (ODBA) algorithm for hybrid WDM/TDM passive optical networks. ODBA algorithm operates using information frame length of the subscriber’s ONUs and their information arrival rate; both of these factors finalize the assigned transmission capacity to the users. The system performance under differing offered traffic loads is evaluated in terms of network throughput, average delay and channel utilization. Further, the proposed ODBA scheme is validated by performing a comparative analysis with well-known algorithms.

Sleep-aware wavelength and bandwidth assignment scheme for TWDM PON

“…In order to efficiently arbitrate the available upstream (US) bandwidth in a fair manner among all the ONUs and all the active wavelengths, a dynamic bandwidth and wavelength assignment (DWBA) scheme in PON plays a key role (Sikora et al 2019). Although, a simple static wavelength assignment scheme could also be used as in Singhal et al (2020), it does not perform well as it may lead to an unbalanced traffic load on the wavelengths and, thus, lead to an inefficient utilization of the available bandwidth resource. A better approach is to employ a load adaptive wavelength (LA-WBA) activation approach as in Kallergis and Douligeris (2020), Garg and Dixit (2019).…”

“…(Kondepu et al 2015) Initially all the wavelengths are assigned an equal no of 16 ONUs. To model and simulate an asymmetric load scenario, the traffic load generated for ONU ID 0 to 31 is reduced by 20%, while the traffic load for ONU ID 32 to 63 is raised by 20% as also in Singhal et al (2020). These traffic configurations among the ONUs will equalize the traffic generator's overall network load.…”