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Diffserv(Differentiated Service) is a promising technique to realize scalable QoS control in the internet. Therefore, extensive efforts have been made for the practical use of this technique. Diffserv is already introduced in some networks. Control functions for Diffserv are installed in edge routers and core routers. This enables a scalable QoS control as mentioned above. This paper proposes a new...
This paper presents an overview of random early detection algorithm and differentiated services on ns2. In the present scenario of computer networks the traffic is increasing exponentially due to which packet losses are also increasing at a great rate. An active queue management in routers and gateways can potentially reduce packet loss rates in the Internet. In this paper we have proposed use of...
Differentiated Services (DiffServ) networks categorize routers into edge routers and core routers. In core routers, one of the technological challenges is how to implement differentiated bandwidth allocation and TCP protection together with low complexity. We present an Active Queue Management (AQM) scheme called CHOKeW. A method is borrowed from a previous scheme, CHOKe, which draws a packet at random...
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...
To satisfy the low delay, low jitter performance requirements of real-time traffic such as VoIP, DiffServ EF class using priority scheduling is normally recommended. This requires limits on admissible load, configured to meet the most stringent QoS in the real-time traffic mix. To handle multiple realtime service types with heterogeneous QoS, we propose a novel alternative: DiffServ AF classes with...
An application of optical burst switching (OBS) and, particularly, wavelength routed OBS (WROBS) to access networks is presented. A dynamic bandwidth allocation (DBA) distributes the bandwidth resources combining time division multiplexing (TDM) and WROBS. To provide quality of service (QoS) supporting differentiated services, prioritizing classes of service (CoS) is considered to manage the DBA module...
Employing effective buffer management schemes at Internet routers has been an increasing important issue in order to guarantee quality of service (QoS) to diverse Internet services. One of its primary goals is to control jitter and latency required by real-time and interactive traffic. Therefore, effectively constraining delay to a specified value is a key QoS requirement. This paper presents a new...
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