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We study the impact of asymmetric loading on the power saving performance of EPON networks. It is generally observed that asymmetric loading often leads to reduced network performance compared to that from symmetric loading. For such network, an adaptive bandwidth assignment scheme according for traffic load can be set to meet the target of delay performance or power saving effect.
Two mechanisms are proposed in this paper to be incorporated with IEEE 802.11e EDCA MAC protocol for providing the QoS provisioning capability of such network. First, the call admission control function, which considers the inherent contention access feature of 802.11 MAC, aims to satisfy the QoS requirement of established higher priority connections, while protecting the minimum reserved bandwidth...
Many network management stations are designed statically to accomplish a set of defined functions taken from object IDs. As the implemented MIB objects for under-development WiMAX tend to grow, redesigning a deployed network manager would occur many times. Therefore, providing a more generalized and customizable network manager would become an alternative solution. In this paper, we design a customizable...
WiMAX features several QoS service classes to schedule different types of traffic. In this paper, we will assess the existence of self-similar traffic for each service class. The experiment starts by capturing the traffic data with a dedicated SNMP-based network management system (NMS). NMS manages the deployment of fixed WiMAX network defined in IEEE 802.16d-2004 Standard and records the inbound...
In this paper, we propose a delay sensitive multicast mechanism for downstream traffic in WDM/TDM PON. The multicast scheduling mechanism, based on the principle of first come first served (FCFS), takes different priorities of multicast traffic into consideration. Both those packets located at the head and the tail of the queue are examined to keep packets alive for providing appropriate differentiated...
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