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In this paper we propose a hybrid network-on-chip which combines Spatial Division Multiplexing “SDM”-based circuit switching and packet switching in order to efficiently and separately handle streaming and best-effort traffics generated by real-time applications. The SDM technique is used in circuit-switched sub-network in order to increase path diversity, thereby improving throughput and mitigating...
Quality of the service (QoS) plays an important role in the life-cycle of scientific workflows for composing and executing applications. However, the quality of network services has so far rarely been considered in composing and executing scientific workflows. Currently, scientific applications tune the execution quality neglecting network resources, and by selecting only optimal software services...
Because of user mobility, highly dynamic, error-prone wireless channels, the QoS control for mobile Peer-to-Peer (MP2P) streaming media has to face considerable challenges. Given to the advantages of policy management, we develop a policy-based QoS control (PBQC) architecture to provide QoS assurance dynamically and automatically in mobile network environment. And we also propose a MP2P streaming...
To improve the adaptability and stability of Dijkstra algorithm for solving routing problem of service composition, a method to solve routing problem of service composition based on an improved ant colony algorithm is proposed. Firstly, based on the traditional ant colony algorithm, the constraints of it are improved. Secondly, a problem solving model for improved ant colony algorithm is established,...
Video is one of the most popular services in Internet. How to support large scale of streaming media transfer over the Internet has been studied in both academic communities and industry fields. VQM (Video Quality Monitoring) at the end point or in the network is necessary to improve customer's Quality of Experience (QoE). This paper first analyzes the requirements of VQM over the Internet. Then,...
Quality of service is the core of service industry development, and is the most focused issues in service marketing research. Through reviewing the literature of service quality, this research studies the relationship of service quality, customer satisfaction and behavior intention. In this study, the railway passenger services as the empirical study object, the results show that rail passenger service...
Multiprotocol Label Switching (MPLS) is an Internet Engineering Task Force (IETF) specified framework that provides for the efficient designation, routing, forwarding and switching of traffic flows through the network. MPLS is a versatile solution to address the problems faced by present-day networks like speed, scalability, quality-of-service (QoS) management, and traffic engineering. MPLS carries...
With the development of the wireless communications technology and the multimedia technology, the wireless internet multimedia transport of real-time becomes an important applications field. We will meet a problem that the distinguish of the status of package loss is not very good which will affect the QoS when we transport multimedia data in wireless internet. Based on this problem the article comes...
Selection of a suitable and apposite web service for a particular goal oriented job has become a difficult challenge due to the increasing and huge number of web services offering similar functionalities. When dynamic discovery is used in Web Services to select a specific service in optimal way, it is familiar that the outcome of the discovery contains more and supplementary than one provider. From...
Video-on-Demand (VoD) systems are a category of adhoc multimedia services. To provide a quality oriented services to its users, a VoD system requires usage of various resources like bandwidth and disk space. As number of users increase the resources requirements do proportionally increase. Thus these resources are costly and important from QoS perspective. Hence efficient allocation and utilization...
It is heterogeneous wireless Networks (HWN) aggregation foundation for vertical handoff (VHO), and that is key characters of core technology for multi-network aggregation. The currently mechanism handoff trigger is analyzed, a best network selected (BNS) framework is designed, the parameters of network terminal and user terminal of effecting VHO algorithm, and which also include norm of capable parameters,...
Ultra-Wide Band (UWB) wireless communication is a promising spread-spectrum technology with features of low cost, low power and high time resolution has potentially important applications in wireless ad hoc networks. This paper presents a novel quality of service (QoS) routing scheme for wireless multimedia ad hoc networks. Besides applying neighbor detection method in route discovery procedure, the...
Quality of Service (QoS) routing is known to be an NP-hard problem in case of two or more additive constraints and several exact algorithms and heuristics have been proposed to address this issue. In this work, we consider a particular two-Constrained Quality of Service Routing Problem where one constraint is superlative and the other is comparative. We consider the superlative constraint to represent...
Quality of service (QoS) provisioning generally assumes more than one QoS measure which implies that QoS routing can be categorized as an instance of routing subject to multiple constraints: delay-jitter, bandwidth, cost, etc. We study the problem of constructing multicast trees to meet the QoS requirements of real-time interactive applications where it is necessary to provide bounded delays and bounded...
In a dynamic environment, some services may become unavailable, some new services may be published and the various properties of the services, such as their prices and performance, may change. Thus, to ensure user satisfaction in the long run, it is desirable that a service composition can automatically adapt to these changes. To this end, we leverage the technology of reinforcement learning and propose...
Several adaptation approaches, such as policy-based and reinforcement learning, have been devised to ensure end-to-end quality-of-service (QoS) for enterprise distributed systems in dynamic operating environments. Not all approaches are applicable for distributed real-time and embedded (DRE) systems, however, which have stringent accuracy, timeliness, and development complexity requirements. Supervised...
There are certain aspects in the field of networking that needs to be accomplished, yet it is very difficult to achieve. One such concept is Optimization. Achieving a high degree of reliability will eventually lead us to Optimization. But, achieving high degree of reliability?? This indeed is a very big problem that needs a solution. There have been many solutions before that solves the problem in...
The primary role of network access control is to decide on the validity of user's identity accepted into the networks and authorization accessed to the particular resource so that users conforming to their established access polices achieve predefined services. This paper presents a specific scenario which supports quality of service (QoS) in network domain. The QoS access rules are based not only...
In a downlink orthogonal frequency division multiple access (OFDMA) system, allocating sub-channels and power across multi-user can require excessive feedback of channel state information. An efficient proportional fair scheduling algorithm based on cluster feedback scheme is proposed in the paper. Simulation results show that the scheme needs only little feedback information while maintaining guaranteed...
Data mining and scoring tool providers require users to use provider-specific ways to invoke their services. The provider-specific approach could be a major factor affecting why data mining tools and applications are not currently as widespread as one might hope. However, SOA can implements the loose coupling between the services provider and services consumer. Using Web service protocol (such as...
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