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We propose a new adaptive real-time polling service (artPS) scheme in order to adaptively allocate polling resources upon arrival of non-periodic real-time on-line gaming packets. Performance evaluation shows that the proposed artPS scheme increases a system capacity of 3.4 - 13.5%, compared to that of the rtPS scheme, by reducing the amount of the polling resources to 67.6 - 77.2% of that of the...
Adaptive Rate Control (ARC) is a successful algorithm to increase the throughput to The Digital Video Broadcasting Return Channel via Satellite (DVB-RCS) but the throughput and dropped traffic did not meet the Quality of Service (QoS) for multimedia traffic standard [ETSI EN 300 421 v.1.1.2]. This paper will present the modified ARC algorithm to overcome the QoS problem for multimedia traffic by prioritize...
This paper proposes a novel traffic engineering method using on-chip diorama network that consists of virtual nodes and virtual links. The diorama network is implemented on reconfigurable processor DAPDNA-2. In these years, traffic engineering has widely researched to guarantee QoS (quality of service). The proposal is an experimental solution with the on-chip diorama network, where virtual links...
The notion of quality is an important factor in the design of any complex communication system. Since most communication systems are increasingly dependent on packet switching as the underlying transport mechanism, this paper explores the impact of levels of quality that a packet switched system can have on cost. Several interesting results are presented that result in the notion of an optimum level...
This paper presents a comprehensive system modeling and analysis approach for both predicting and controlling queuing delay at an expected value under multi-class traffic in a single buffer. This approach could effectively enhance QoS delivery for delay sensitive applications. Six major contributions are given in the paper: (1) a discrete-time analytical model is developed for capturing multi-class...
Flows have different characteristics depending on the type of application, and this leads to consideration of the QoS needed to guarantee that the application will work satisfactorily. However, the scheduling algorithms such as WFQ, DRR, or hierarchical scheduling algorithms are complex to guarantee QoS in per-flow level because of buffer management. Calendar queue is appropriate to service per-flow...
A multicast packet is delivered to multiple users after copying in a multicast node, so the multicast Quality of Service (QoS) is based on the performances of all receivers due to copy mechanism. A favorite multicast service is more important than other multicast services because it has more users than others. Therefore, this paper proposes a copy number based multicast scheduling algorithm in Broadband...
Diffserv (differentiated service) is a promising technique to realize scalable QoS control on the Internet. Extensive effort has therefore been put into the practical use of this technique. Diffserv has already been introduced in some networks. Control functions for Diffserv are installed in edge routers and core routers. This realizes scalable QoS control as mentioned above. This paper proposes a...
Although IMS (IP multimedia subsystem) brings a large set of new services and offers service convergence, it introduces complexity on network procedures and architecture. This paper focuses on IMS session establishment procedure and highlights the long delay introduced by this procedure. It also raises failure problems encountered when only partial radio resources are available for the requested service...
As the integration of prevailing voice over Internet protocol (VoIP) technology and wireless local area network (WLAN), voice over WLAN (VoWLAN) is expected to experience a dramatic growth in the near future. However, increasing voice capacity of the system still remains a problem. In this paper, the voice capacity of "waiting-time dependent backoff (WDB)" algorithm proposed in our previous...
A collection of slides from the author's conference presentation is given. It is concluded that: QoS for subscribers is a potential additional business case for Access Network operators; technology is mature and proven; - QoS support can be added to Ethernet-based access networks at low initial investment which will lead to gradual upgrade upon customer acceptance.
This paper presents an efficient multicast routing algorithm called DNMA. According to our simulation results, the proposed algorithm outperforms some existing well-known approaches for solving QoS of multicast routing problem in large scale networks.
The ideal design for VoIP should be able to maximize the number of concurrent users while each admitted user enjoys the satisfactory quality of voice communication. In a recent packet-based wireless system, the quality-of-service (QoS) provisioning for VoIP raises several challenging issues including correlated delay performance among users and the rate-reliability tradeoff in managing multiple transmission...
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