Weight-based Bandwidth Allocation Algorithm for Improving the QoSs of Multi-OLT PON in Downstream Direction

In this era of optical communication, the passive optical network (PON) having multiple optical line terminals (multi-OLT) will play a vital role for both the data and voice communications of multiple service providers. For downstream data transmission of multi-OLT PON, the existing algorithms are not effective to allocate bandwidth among different service providers. Because, the existing scheme does not provide fairness in sharing of downstream bandwidth. This paper proposes a new downstream bandwidth allocation scheme for multi-OLT PON system called fair and weight-based bandwidth allocation (FWBA) algorithm. In the proposed scheme, we have considered a multi-OLT PON system for convergence of cable television, fiber-to-the-home, wireless sensor, and femto networks. The performances of the FWBA scheme have been analyzed on the basis of transmission delay, idle-time as well as traffic handling capacity. The comparative analysis of simulation results show that the FWBA scheme performs better than non-weight-based DBA (NWBA) scheme.