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Summary: 424 IEEE SYSTEMS JOURNAL, VOL. 4, NO. 4, DECEMBER 2010
An Application-Oriented Fair Resource
Allocation Scheme for EPON
Jingjing Zhang, Student Member, IEEE, and Nirwan Ansari, Fellow, IEEE
Abstract--This paper investigates an application-oriented
bandwidth allocation scheme to ensure fairness among queues
with diversified quality-of-serice (QoS) requirements in EPONs.
Formerly, differentiated services (DiffServ) were suggested to be
used in EPON so as to provision some queues with higher QoS
over others. However, owing to the coarse granularity, DiffServ
can hardly facilitate any particular QoS profile of an application
in EPONs. In this paper, we define application utilities to quantify
users' quality-of-experience (QoE) as a function of network layer
QoS metrics. Then, we formulate the fair resource allocation issue
into a utility max-min optimization problem, which is quasicon-
cave over queues' delayed traffic and dropped traffic. Utilizing the
quasiconvex property, we propose to employ the bisection method
to solve the optimization problem. The optimal value can be
achieved by proper bandwidth allocation and queue management
in EPONs. Detailed implementation of the proposed algorithm is
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