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In this paper we analyzed suitability of different routing algorithms for establishing bandwidth-delay constrained traffic tunnels in SDN backbone networks. Bandwidth rejection ratio was used as indicator of algorithm's ability to efficiently utilize network resources. Through set of simulations on two real backbone topologies we showed that network topology can affect algorithm's performance, and...
This paper introduces a dynamic bandwidth assignment algorithm designed for ring topology (R-DBA) in order to meet the needs of the construction of Metropolitan Area Network (MAN).This algorithm targets ring topology, based on fair iteration, supports various Qos services and has previous assignment mechanism.
Localized Quality of Service (QoS) routing has been recently proposed for supporting the requirements of multimedia applications and satisfying QoS constraints. Localized algorithms avoid the problems associated with the maintenance of global network state by using statistics of flow blocking probabilities. Using local information for routing avoids the overheads of global information with other nodes...
The biggest contemporary drawback in the maintenance and distribution of the global state is the increase in communication overheads. Localized routing is the method to avoid this problem. New localized routing algorithms called Highest Minimum Bandwidth routing (HMB) is introduced in this paper. The new algorithm is compared under different traffic loads and network topologies to the existing localized...
Quality of service (QoS) routing has recently been improved by using localized routing rather than global state information. The traditional global method is associated with many problems which are avoided by using the Localized Quality of Service (QoS) routing. The network in this technique is inferred by the source nodes using statistics which is collected locally. This paper presents new localized...
The IEEE 802.16 standard recently introduced an additional relay mode of operation permitting coverage extension of the point-to-multipoint (PMP) based WiMAX networks. Relays can further aid in increasing the achievable data rates for subscriber stations (SS) in the network. Although bandwidth management and scheduling have been studied in some detail in traditional IEEE 802.16 PMP networks, the corresponding...
The issues of network performance and reliability in wireless access networks have become indispensable due to the increasing needs for communication services anywhere and anytime. Traditional design of wireless backhaul networks has a simple tree-like structure which is vulnerable to network failures. To protect services against network component/facility breakdown, reliable network design is required...
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