Abstract
The integration of Ethernet Passive Optical Network (EPON) with IEEE
802.16 (WiMAX) is regarded as a promising access solution in realizing fixed
mobile convergence (FMC) networks. The complementary features of EPON and
WiMAX can bring not only wide bandwidth and mobility to subscriber stations
(SS) but also economic efficiency to network providers. For successful
convergence of EPON and WiMAX, there are some technical issues to resolve
bandwidth allocation and QoS support in the MAC layer. Specifically, the
independent scheduling (IS) mechanism to transmit data between EPON and
WiMAX can cause performance degradation. For realizing EPON and WiMAX
integration, this paper investigates three possible integrated architecture:
independent ONU-BS (IOB), combined ONU-BS (COB), and hybrid ONU-BS (HOB).
The emphasis on this paper is how to reduce the End-to-End (ETE) delay
between EPON and WiMAX. For doing this, we propose a centralized scheduling
(CS) mechanism that shortens the packet delay and the time of transmitting
data upon requesting bandwidth for the SS. Simulation results witness that
the proposed CS mechanism improves ETE delay, throughput, and QoS support
compared to the IS when the cycle time of EPON and the frame size of WiMAX
are 1 ms and 5 to 10ms, as well as 2 ms and 5 ms,
respectively.
© 2010 IEEE
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