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In this paper, we propose QoS-aware AQM(Active Queue Management) method considering video quality level that service users request in DiffServ network environment. QoS provision is essential in order to provide multimedia services because real-time multimedia services such as IPTV and VoIP are sensitive to delay and packet loss. However, existing AQM methods can't guarantee QoS for a multimedia service...
This paper proposes efficient analytical models to dimension the required transport bandwidths for the Long Term Evolution (LTE) access network for the elastic Internet traffic (which is carried by the TCP protocol). The dimensioning models are based on the use of Processor Sharing queuing theory to guarantee a desired end-to-end application QoS target. For validating the analytical dimensioning models,...
DiffServ model is a main model that guarantees QoS in modern-Large-scale network., On the basis of RIO-C, the paper introduces an Active Queue Management algorithm -- PFRIO that is suitable for DiffServ model. The algorithm increases the fair for bandwidth allocation and the network's capacity to hand of sudden data flow, and improves the overall performance of DiffServ model effectively.
In this paper, an integrated scheduling algorithm of unicast and multicast is presented for providing QOS service and handling the mixed data of unicast and multicast. The key idea is to schedule the six QOS types independently and in parallel, and schedule the unicast and multicast by a single integrated algorithm, then arbitrate among them for accessing to the switching fabric. The QOS mechanism...
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...
This paper evaluates QoS techniques for transmission of real-time video that use a DiffServ mechanism that includes an efficient bandwidth agent to allocate bandwidth on heterogeneous networks, a Hierarchical Token Bucket (HTB) queuing scheme at the output interface of Linux-based routers, and a policing mechanism at the incoming interface of the edge router (ER) in a Linux-based testbed. The testbed...
This paper proposes the active queuing management and channel allocation method (Active WRED) for the quality guarantee of the various WiBro services in the NGN(Next Generation Network) environment. The threshold of WRED (Weighted Random Early Detection) is controlled for the guaranteed service QoS, and a queue length and CID(Connection ID) are actively allocated. The QoS can be guaranteed through...
In a military communications environment, multiple communication links could exist between senders and receivers. This feature enhances communication connection reliability and throughput. Since each link may not use the same type of device or transmission method and links' characteristics may not be the same, sometimes, the link availability and link data rate could fluctuate significantly, which...
The Ethernet passive optical network (EPON) has recently attracted more attentions from the academic research and industry since it could be a perfect candidate for next generation access networks. Supporting differentiated services is an important issue for service providers to design an EPON system. In this paper, we propose an urgency fair queuing (UFQ) scheme to support DiffServ among multiple...
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