860,747 research outputs found
Self-adaptive distributed management of QoS and SLSs in multiservice networks
Apresentação efectuada na International Conference on Integrated Management (IM 2005), Nice, France, May 2005.Distributed service-oriented traffic control mechanisms, operating with minimum impact on network performance, assume a crucial role as regards controlling services quality and network resources transparent and efficiently. In this way, we describe and specify a lightweight distributed admission control (AC) model which provides an uniform solution for managing QoS and SLSs in multiclass and multidomain environments. Taking advantage of the consensual need of on-line service monitoring and traffic control at the network edges, AC decisions are driven by feedback from systematic edge-to-edge measurements of relevant QoS parameters for each service type and SLS utilization. This allows self-adaptive service and resource management, while abstracting from network core complexity and heterogeneity. In this paper, introducing an expressive notation, we specify the high-level entities for multiservice provisioning in a domain and formalize service-dependent AC equations to assure both intra and interdomain model operation. A proof-of-concept of the AC criteria effectiveness in satisfying each service class commitments while achieving high network utilization is provided through simulation
The impact of green logistics service quality on logistics provider performance
Paper delivered at the 19th Logistics Research Network annual conference 2014, 3rd-5th September 2014, Huddersfield. Effective and efficient logistics services can enhance the firm’s competitive advantage. Therefore, logistics management can be considered as a key component of organisational effectiveness and success (Khan and Burnes, 2007). At the same time, environmental or green issues in logistics service offerings have attracted much managerial attention in the logistics industry for the future. One important objective is for logistics service providers (LSPs) to deliver their service offerings to customers in more environmentally friendly ways. The study is ongoing project and investigates variables and constructs of green service quality, logistics service quality and logistics performance index in Thailand. The purpose of this paper is to report on an ongoing study of the importance and relationship of green service quality (GSQ) competencies relative to logistics service quality (LSQ) competencies in the context of Thai LSPs
An Experimental Approach to Examine a Multi-Channel Multi-Hop Wireless Backbone Network
This paper presents an experimental deployment of a multi-channel multi-hop wireless backbone network (WBN) with an OpenFlow-based traffic management method. Specifically, a set of APs, each of which uses a single but different channel, is connected by Ethernet and thus constructs a Virtual AP (VAP), thereby achieving a WBN with multi-ple channels. To exibly control traffic ows transmitted over a multi-channel multi-hop WBN, we propose a simple traffic management method based on the OpenFlow control. In the performance evaluation, we rst conduct a preliminary experiment as a lab scale and then deploy a 6-hop WBN enabling to provide the Internet access service in a conference (from proof-of-concept to a practical environment). Since the control messages are inherently transmitted with the introduction of OpenFlow, the way of isolation be-tween control plane and data plane will become a critical issue to actually deploy the proposed system for the Internet service. We additionally employ a wireless control network for the conference experiment. The experimental results show that the proposed WBN can increase the network capacity in accordance with the number of channels, thereby providing significant throughput performance for various applications
Latency-Sensitive Web Service Workflows: A Case for a Software-Defined Internet
The Internet, at large, remains under the control of service providers and
autonomous systems. The Internet of Things (IoT) and edge computing provide an
increasing demand and potential for more user control for their web service
workflows. Network Softwarization revolutionizes the network landscape in
various stages, from building, incrementally deploying, and maintaining the
environment. Software-Defined Networking (SDN) and Network Functions
Virtualization (NFV) are two core tenets of network softwarization. SDN offers
a logically centralized control plane by abstracting away the control of the
network devices in the data plane. NFV virtualizes dedicated hardware
middleboxes and deploys them on top of servers and data centers as network
functions. Thus, network softwarization enables efficient management of the
system by enhancing its control and improving the reusability of the network
services. In this work, we propose our vision for a Software-Defined Internet
(SDI) for latency-sensitive web service workflows. SDI extends network
softwarization to the Internet-scale, to enable a latency-aware user workflow
execution on the Internet.Comment: Accepted for Publication at The Seventh International Conference on
Software Defined Systems (SDS-2020
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