A Bi-Partitional Dynamic Bandwidth Allocation Mechanism for Differentiated Services to Support State Report ONUs in GPON

Abstract—With the emerging diversified services, the gigabit-capable PON (GPON) has emerged as one of the most promising broadband access network solutions due to the increasing demand for residential bandwidth. In this paper, a novel bi-partition dynamic bandwidth allocation (B-DBA) mechanism is proposed to enhance the differentiated services over GPON. The proposed B-DBA mechanism divides the transmission cycle time into two groups and adjusts the bandwidth dynamically between the first group for high priorities T-CONT 1, and T-CONT 2 and the second group for low priorities T-CONT 3, and T-CONT 4. Moreover, the T-CONT 2 traffic has prediction mechanism and recycles the remaining unused bandwidth for the low priority T-CONTs. The system performance of B-DBA mechanism is compared with the Jiang’s protocol in terms of the throughput, end-to-end delay and jitter for 32 ONUs. Simulation result shows that the proposed B-DBA mechanism can improve the QoS services without sacrificing the low priority traffic except before the system is half-loaded