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Fiber-wireless (FiWi) access mesh networks have been proposed as flexible and cost-effective solutions for future access networks. However, for FiWi access mesh networks to provide end-to-end QoS guarantees to its customers, efficient QoS routing schemes and scheduling policies become necessary. Here we provide a model, using repeated game theory, that creates ground for scheduling policies to be...
In this paper, we propose a bandwidth allocation scheme working with differentiated services for the Multi-Point Control Protocol (MPCP) in Long-Reach Passive Optical Networks. The proposed scheme is an enhancement to our recently proposed bandwidth allocation scheme Periodic Gate Optimization (PGO), and it is called Periodic Gate Optimization with Quality of Service Awareness (PGO-QoS). Long-Reach...
Recently many countries have kept studying on the methods of constructing ultra speed networks. Task Force team for IEEE 802.3ah has accomplished the standardization of EPON which is the next generation subscriber access network. EPON doesn't still have the bandwidth wide enough to support the new service which demands high bandwidth. Therefore 10 G EPON is the next generation subscriber access network...
The average link utilization at the backbone of Internet is less than 10%. But the bandwidth that users can experience is very limited. Researchers find the switching capability of metropolitan area networks (MAN) is the major bottleneck. This paper adopts the multi-path self-routing switching structure as the switching fabric, which is interconnected by multistage sorting concentrators. With its...
In this paper, we propose a QoS-aware class gated DBA algorithm in which the bandwidth is requested/granted on a service class basis. To avoid the monopoly on bandwidth by higher classes, the maximum bandwidth that is allocated to each service class is limited (fairness between service classes). In addition, to avoid the monopoly on bandwidth by particular users, each ONU runs a fairness bandwidth...
Providing strong QoS guarantees for wireless multi-hop networks is very challenging, due to many factors such as use of a shared communication medium, variability in wireless link quality, and so on. However, wireless mesh technology gives the opportunity to alleviate some of these problems, due to lack of mobility in the wireless infrastructure, and presence of natural centralization points in the...
Random Early Detection (RED) can effectively avoid transmitting congestion at routers, but RED can not provide bandwidth fairness. Different packet sizes are one of the reasons that damage fairness. RED routers provide little protection from some bulky data flows that use considerably more bandwidth than other flows in time of congestion. Modifying the formulas of calculating final packet-discard...
Ethernet passive optical network (EPON) has been widely studied in literatures in the past few years. Researchers from all around the world are investigating EPON main challenges and dynamic bandwidth allocation (DBA) problems. This paper, reviews the most recent studies conducted in EPON networks and presents the new proposed DBA schemes. The reviewed schemes are classified according to the main...
Ethernet Passive Optical Networks (EPON) is a prominent solution for broadband access networks. However, little work has been done on emergency handling in EPON. In this paper, to manage emergency cases causing severe network traffic, the network state is divided into two states, i.e., the normal and the emergency states. The authors apply new priority- based Dynamic Bandwidth Allocation (DBA) algorithms...
One of the vital key elements for providing quality of service (QoS) for VoIP is the call admission control (CAC) capabilities of the session management/call session control function or gateway. Even though the network may be designed to meet a given performance and restoration objective for the engineered traffic loads, the actual traffic may be significantly higher. Without a CAC function in a VoIP...
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