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Passive optical network (PON) systems are rapidly becoming the most promising and cost-effective class of fiber access systems. In this paper we investigate the performance of a simple PON configuration, in respect of the end-to-end packet delay. The network supports multiple service-classes with priorities, in terms of the number of packets that can be transmitted in each transmission period. We...
We study the call-level performance behavior of two Passive Optical Network (PON) configurations in the upstream direction: an Optical Code Division Multiple Access (OCDMA) PON and a hybrid Wavelength Division Multiplexing (WDM)-OCDMA PON. Each PON accommodates 2K service-classes, which are grouped in two service priorities. The latter are denoted by thresholds in accessing the PON resources. The...
We investigate the performance of the IEEE 802.11e in respect of end-to-end delay, which is estimated by the sum of queuing delay and MAC delay. The MAC delay analysis is performed based on elementary probability theory (conditional probabilities) while avoiding the complex Markov Chain method. A comprehensive study of the MAC delay is presented by providing higher moments of the MAC delay distribution...
The performance evaluation of wavelength division multiplexing (WDM) all-optical networks becomes an exceptionally important research topic, especially when the traffic grooming technique is used. In this paper we develop analytical loss models for calculating route establishment failure probabilities and call blocking probabilities in traffic-groomed WDM networks. We consider both single optical...
The passive optical network (PON) is an attractive solution for delivering services with numerous applications, such as high-definition video, video conferencing and data traffic. In this paper we develop teletraffic loss models for calculating connection failure probabilities (due to unavailability of a wavelength) and call blocking probabilities (due to the restricted bandwidth capacity of a wavelength)...
We study a hybrid WDM-OCDMA Passive Optical Network (PON) with dynamic wavelength allocation, and propose analytical models for calculating connection failure probabilities (due to unavailability of a wavelength) and call blocking probabilities (due to interference of neighboring calls). The PON accommodates multiple service-classes with infinite number of traffic sources. The springboard of our analysis...
The authors present an extensive investigation of the performance of the IEEE 802.11 medium access control (MAC) protocol, with respect to throughput and delay. For the protocol analysis, a new model, which describes the protocol's behaviour to a great extent by incorporating and extending the existing models, is proposed. The authors also present a detailed analysis of the end-to-end delay through...
Traffic grooming in Wavelength Division Multiplexing (WDM) optical networks is a promising technology for improving the performance and reducing the network cost. We study the blocking performance of a single-hop WDM traffic groomed optical network, by considering that different connections request service through a single optical link. In each connection the generated calls may come from a single...
The IEEE 802.11 protocol is the dominant standard for wireless local area networks (WLANs) and has generated much interests in investigating and improving its performance. The IEEE 802.11 medium access control (MAC) is mainly based on the distributed coordination function (DCF). DCF uses a carrier sense multiple access with collision avoidance (CSMA/CA) protocol in order to resolve contention between...
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