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This paper presents a Model of Quality of Service (QoS) for Next Generation Networks (NGN), that consist of a tower of five defined layers such as the Model Layer of QoS, Control of Admission, QoS in the Routing, QoS in the Signaling, and MAC QoS. In addition, the model raises a method based on the concept of segregation of functions defining two functional networks along with the tasks of QoS. Then,...
Explicit congestion notification (ECN) is a mechanism that can be used to provide early indication of impending Internet congestion, and as such can be used to reduce the latency and improve the throughput of applications using the Internet. This paper examines the impact of using ECN with quality of service classification for Internet paths that include a satellite delay. Specifically, it provides...
A large body of networking research has addressed the question of predicting steady state quality of service measures such as delay distributions and loss probabilities for various purposes such as network design (i.e., dimensioning links, buffers, switches, etc.) and admission control (making a decision whether or not to admit a connection or set of connections into the network). In a high-speed...
In high-speed networks supported by TCP/IP, congestion control algorithm plays an important role. Real time streaming media, such as video, audio conversations and movies on line, often are transmitted over the Internet. The dominant paradigm for congestion control in the Internet is based on the TCP friendliness. As the load on the network increases, it is critical to find the point at which congestion...
In real-time application area for ad hoc wireless network (AHWN), the node responds in time on requirements so that a data channel between the nodes must offer guaranteed service. End-to-end delay jitter with an upper bound is one of guaranteed services, whether or not the upper bound on end-to-end delay jitter can obtain guarantee is a key to implement effectively routing, congestion control and...
There is growing evidence that a new generation of potentially high-revenue applications requiring quality of service (QoS) guarantee are emerging. Current methods of QoS provisioning have scalability concerns and cannot guarantee end-to-end delay. For a theoretical fluid model, we derive four distributed rate and delay controls accounting for their bandwidth and end-to-end delay requirements while...
Dynamic admission control is a very important mechanism that aims, not only to check resources availability, but also to verify QoS constraints satisfaction. In this paper, we propose a new admission control mechanism in MPLS-based packet-switched networks. This admission control mechanism satisfies delay constraints for all the network connections. The admission control mechanism is based on solving...
VoIP has been widely investigated to provide statistical quality of service (QoS) guarantees. We address the issue of how to select an efficient route to carry real-time traffic. Each eligible route is assigned a weight, which is updated according to network level QoS evaluation. When a new coming call arrives, originating signaling server first chooses two candidate routes from all practicable routes...
Various real-time applications are widely used with the development of network infrastructure. To guarantee QoS (quality of service) of these applications strictly, the Internet requires a flow-based priority control. Thus, we have proposed an output buffer control mechanism. In this paper, to guarantee end-to-end QoS maximally by exploiting the buffer control mechanism, we propose the method of mutual...
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