A Fair Scheduling Discipline for Ethernet Passive Optical Networks

Abstract

We propose a novel policy called Proportional Sharing with Load Reservation (PSLR) for scheduling upstream flows in Ethernet Passive Optical Networks. This policy provides bandwidth guarantees on a per flow basis and redistributes the unused bandwidth among active flows in proportion to their priority level.

Dynamic bandwidth allocation EPON survey

“…The delay and jitter of high priority traffic can be minimized and thus the overall performance is enhanced. Among the algorithms that support QoS globally can be found in [26][27][28][29][30]. Algorithm in [26] consists of two parts.…”

“…Class-of-service (CoS) oriented packet scheduling [28] regulates the traffic of each ONU and CoS using two sets of credit pools, one per ONU and one per CoS. Firstly, each ONU with traffic for the current CoS is granted up to the number of credits stored for that ONU-CoS. Next, the unused credits are pooled together and distributed to the CoS-ONU pairs that were not fully satisfied. In [29], a Proportional Sharing with Load Reservation algorithm provides bandwidth that guarantees per-flow basis and redistributes the unused bandwidth among active flows in proportion to their priority level. In [30] excessive bandwidth scheduling is combined with the M-SFQ technique by limiting the granted bandwidth to requested.…”