Abstract
Closed-form mathematical expressions of network performances, such as the mean packet
delay, are useful for evaluating a communication network during the design process. This paper
provides derivations of closed-form expressions of the mean packet delay for the gated service
and the limited service of dynamic bandwidth allocation in Ethernet passive optical networks
(EPONs). Based on the M/G/1 queueing analysis framework of a multiuser cyclic polling system,
we derive the mean packet delay expressions by modifying the expressions for the reservation
time component of the total delay. Results from simulation experiments confirm that our
analysis can accurately predict the mean packet delay. Finally, we extend the analysis to
demonstrate how the limited service can protect packets transmitted by a light-load user from
having excessive delays due to high traffic loads from other users in the same EPON. The
analytical results indicate that, in selecting the maximum length of a scheduling cycle for
the limited service, there is a tradeoff between the mean packet delay under uniform traffic
and the guaranteed upper bound on the mean packet delay under nonuniform traffic.
© 2010 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription