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Service differentiation is known as on the classic and major tasks in IP networks. We propose a novel queuing method which benefits both “Less Impact Better Service” (LIBS) and fuzzy logic paradigms. LIBS leads us to a queuing method called non-congestive queuing, which prioritizes small packets when conditions permit to limit the delay impact of prioritization on congestive applications. In our proposed...
Current network situation with its limited resources and excessive users' demands reveals the potential necessity for revolutionary organization and management of these resources. Efficient and effective resource scheduling significantly reduces queuing delay which considered as crucial particularly for sensitive packets such as real-time application. This study investigates in the main four categories...
Allusion to the various different requirements QoS's quota such as delay sensitivity of multi-medium business for Multi-media communication in Heterogeneous wireless network, we put forward the attemper arithmetic of classify queue based on multi-medium communication. Grade the now operation according to the factors of flux, delay and error tolerance etc, and the node that participates transmission...
Queue scheduling algorithm achieves the assignment of the network resource through scheduling strategy, the reserved bandwidth and delaytime can be guaranteed, then the router select the next packet waiting for forwarding from one or more queues based on some rules, All input network services can share the output bandwidth according to reserved way, to have corresponding resource, and to meet service...
The IEEE 802.16 standard defines MAC and physical layer protocols for broadband wireless access, however it does not specify any scheduling algorithm. In this paper, we propose a RED-based Weighted Fair Priority Queuing algorithm for inter-class scheduling and a channel aware algorithm for intra-class scheduling. Weights of the service classes are adaptive according to the QoS requirements of each...
In this paper, based on analyzing the two existing queue scheduling algorithms WRR and DWRR, an improved scheduling algorithm, called DWRR+, is presented, which is the resolution for the fairness of bandwidth allocation of the WRR algorithm. The ns-2 simulations show that the improved scheduling algorithm not only offers the service of the minimum guaranteed bandwidth but also implements the fair...
In Medium and High Rate Wireless Sensor Networks (MHWSNs), a sensor node may gather different kinds of network traffic. To support quality of service (QoS) requirements for different kinds of network traffic, an effective and fare queuing and scheduling scheme is necessary. The paper present a queuing model to distinguish different network traffic based priority, and proposed a rate adjustment model...
The multimedia traffic can be categorized into three classes based on its real-time properties and loss tolerance, and assigned a separate queue for each class. We focus on the possibility of assuring QoS of multimedia traffic in such switches by implementing traffic prioritization at the input port where each input-queue has been modified to provide a separate buffer for each of the service classes...
With the rapid increase of real-time applications, jitter, delay, and throughput have become the three important QoS criteria in the scheduling of input-queued (IQ) switches with virtual output queues (VOQ). In this paper, we propose a novel frame-based scheduling algorithm, referred to as dichotomy slot allocation (DSA), to achieve high throughput, bounded delay, and bounded jitter. DSA possesses...
The multi-radio access capability in heterogeneous networks presents significant gains both from the system level and the end user level. This paper presents the cooperative transmission models by using multiple available interfaces combined with the specific multi-radio scenarios, and introduces the data scheduling mechanism which is composed of flow-level and packet-level scheduling. The data scheduling...
To ensure Quality of Service (QoS) for data centers, it is critical to enforce a fair share of storage resources between competing users. Interposed schedulers are one of the most practical methods for performance isolation. Most fair queuing-based proportional sharing algorithms for existing interposed scheduler are variants of counterparts designed for network routers and may result in breaking...
The provisioning of fairness among various networking and communication applications is an important quality-of-service (QoS) demand and becomes a challenging research topic. Deficit Round Robin (DRR) is a promising fair scheduling mechanism owing to its low complexity and excellent ability of achieving a good degree of fairness in terms of throughput. Although self-similar traffic has been found...
In this paper, we discuss that both high performance and max-min fair scheduling is necessary for a QoS-awared scheduling algorithm for Combined Input-Crosspoint-Queued switch and present a new scheduling algorithm called Combined Max-Min Fair Scheduling (CMMFS) scheme. Simulation shows that this algorithm can achieve high performance under the uniform and non-uniform traffic pattern and Fairness...
To deal with the problems such as Web Services selection algorithm, availability of Web Services composition and QoS (Quality of Service) guarantee, presents a model for Web Services composition based on QoS and providers' benefit. In this model, the traditional UDDI is expanded to describe the QoS attributes of Web Services. A Service Proxy role is added into this model. All Web Services compositions...
Running time sensitive multimedia services such as voice-over-IP (VoIP) and video-on-demand (VoD) on all-ip networks may have lower quality, i.e. Quality of Service (QoS), than its counterpart on conventional circuit-switched networks. We could enhance overall QoS without investing more resources if routers could forward packets based on their timeliness and QoS class giving important late packets...
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...
In this paper, a scheduling algorithm suitable for weighted fair queuing scheduling has been studied. With the objective to find the best point of QoS between using network band and cell delay, a new scheduling algorithm based on GPS has been used. The new algorithm is characterized by using SHVC and SCFQ algorithm coordinately. As demonstrated by the simulated results, it is not only guarantees the...
In this paper, we consider the important aspect of quality of service (QoS) in wireless mesh networks, focusing on packet delays and packet drops. We observe that the options of solely focusing on throughput, and of only depending on the QoS type characterization by the application level protocol is not sufficient. We propose the use of multiple queues to hold the packets based on their QoS requirement...
IEEE 802.11e (EDCA) standard is concerned to support QoS in wireless ad-hoc networks. However, EDCA cannot control traffic when there is a congestion to guarantee QoS required by real-time and multimedia applications. Therefore, the ill-behaved sources consume the most of bandwidth allowed. That leads to some of source nodes (i.e. out-ranged nodes) suffer from the lack of bandwidth and unfairness...
This paper describes an approach which uses a machine learning model in a packet scheduling problem to improve the end-to-end delay. A good Packet scheduling discipline allows to achieve QoS differentiation and to optimize the queuing delay. In a dynamically changing environment this discipline should be also adaptive to the new traffic conditions. We model this problem as a multi-agent system which...
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