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 TitleDate AddedCompany
whitepaper Advanced QoS White Paper2007-01-17 Allied Telesis
  An Ethernet service that is becoming more attractive to end-users is the Virtual Private LAN Service (VPLS) or Provider Provisioned Virtual Private Network (PPVPN).VPLS enables Service Providers (SPs) to deliver Virtual Private Network (VPN) services based on cost-effective Ethernet, with the same level of support and reliability as existing services that use Frame Relay and ATM. The advanced QoS and shaping features on some newer Ethernet switches enable these devices to be positioned as access devices into Virtual Private LAN networks and for SPs to offer the Service Level Agreements (SLAs) that customers rely on for end-to-end data delivery.

Tags: Local Area Networks (LAN), Quality of Service		   
whitepaper QoS-Aware Streaming in Overlay Multicast Considering the Selfishness in Construction Action2007-01-17 Simon Fraser University
  Most existing overlay multicast proposals have assumed that the nodes are cooperative and thus focus on the global topology optimization. However, a unique and important characteristic of overlay nodes is that, as application-layer agents, they can be selfish with their own interests. To achieve better Quality-of-Service (QoS) or to minimize forwarding overhead, an overlay node can behave selfishly in the information collection or in the overlay construction. While the former has recently been investigated, the impact of selfishness in the construction action remains unclear. This paper presents the first systematic study on the impact of selfishness in both tree and mesh overlay construction. The investigation considers multiple QoS measures for streaming applications, including stream latency, resolution, and continuity.

Tags: Multicasting, Streaming Media		   
whitepaper QoS White Paper2007-01-17 Allied Telesis
  This paper discusses Quality of Service (QoS) and the mechanisms QoS uses to manage congestion on a network to ensure that applications have sufficient network resources to communicate effectively and appropriately for the variety of traffic they use. Using QoS, a network can be configured for stable and predictable end-to-end performance, and network services marketed so that the prices charged are tailored to the 'End-users' desired service level and price point.

Tags: Network Administration		   
whitepaper QoS Issues of Using Probabilistic Non-Repudiation Protocol in Mobile Ad Hoc Network Environment2007-01-12 University of South Australia
  So as to guarantee the fairness of electronic transactions, users may require a Non-Repudiation (NR) service in any type of network. However, most existing NR protocols cannot work properly in a Mobile Ad hoc NETwork (MANET) due to their characteristics (e.g. limited resources and lack of central authority). The design of the Probabilistic Non-Repudiation Protocol (PNRP) is comparatively suitable for the nature of a MANET, but it still poses some QoS issues. This paper points out the QoS issues which are caused by using PNRP in a MANET environment. These issues explain the difficult of performing PNRP in such an infrastructure-less environment.

Tags: Mobile - Wireless Communications		   
whitepaper Multipath Routing in MPLS Networks - A Survey2007-01-08 Technical University of Lodz
  The paper presents the problem of multipath routing supporting the Quality of Service (QoS) in MPLS networks. First, the paper briefly surveys the mechanisms used for setting up data transmission channels. The paper considers those algorithms applied in conventional IP networks which are also used by the MPLS technology. Then, the paper discusses algorithms characteristic for MPLS networks such as SWP, WSP and MIRA. The problems of error tolerance and the way of reacting on the errors are discussed as well.

Tags: Quality of Service, MPLS		   
whitepaper Major Food Retail Chain Choose Allied Telesis for Network Expansion in Italy2007-01-03 Allied Telesis
  Aligrup S.p.A. creates and promotes high-quality distribution systems predominantly geared towards meeting the demand for food products and services. As Aligrup S.p.A. expanded, they needed a network that was flexible and configured to handle the current and future needs for a distributed system. They also decided to offer the other companies infrastructure services, including networking services. Aligrup S.p.A. deployed multi-layer switches from the Allied Telesis 9900 series which immediately proved to be ideal for supporting such a flexible architecture. All the features that make it stand out, from its Quality of Service (QoS) and high-density Gigabit Ethernet ports to its non-blocking architecture and redundant power supply units, provide a competitive advantage.

Tags: Quality of Service		   
whitepaper Delivering a Cisco TelePresence Network Connection Service: The Value of an IP Next-Generation Network2007-01-01 Cisco Systems
  With its ultrahigh definition and CD-quality audio, the Cisco TelePresence Meeting solution empowers users to interact and collaborate more effectively than ever before - and also imposes far greater demands on the network than Voice over IP (VoIP) or video conferencing. Therefore, to offer a telepresence connection service, service providers need a carrier-class network that supports stringent Service-Level Agreements (SLAs) for Quality of Service (QoS) and high availability, as well as Call Admission Control (CAC) to reserve bandwidth before a session is initiated. Furthermore, to offer bundled and tiered telepresence connection services that attract customers and increase revenues, providers need the ability to integrate the Cisco TelePresence Meeting solution with other IP-based applications.

Tags: Quality of Service		   
whitepaper MPAT: Aggregate TCP Congestion Management as a Building Block for Internet QoS2007-01-01 IBM
  Today Internet QoS is deployed piecemeal-typically at known bottleneck links like enterprise access links or wireless links. A more comprehensive, end-to-end QoS deployment, for instance across large enterprise networks or the global Internet, remains elusive. There is growing interest in the idea of using overlay networks to provide differential QoS services (improve performance for some flows at the expense of other flows). A necessary building block is the ability to provide differential service over a single overlay link that traverses many IP router hops. This paper presents MPAT, the first truly scalable algorithm for fairly providing differential services to TCP flows that share a bottleneck link.

Tags: Bandwidth Issues, TCP - IP		   
whitepaper Nortel Network Case Study: Suncor Energy Inc.2007-01-01 Nortel Networks
  Suncor Energy Inc. is a rapidly growing $11 billion integrated energy company headquartered in Alberta, Canada. With a multi-billion dollar operational expansion project in progress, Suncor Energy needed to cost effectively and seamlessly upgrade their network infrastructure to address advanced application demands and skyrocketing bandwidth requirements. Nortel put in place a Quality of Service-capable network that allows Suncor to take advantage of VoIP technology more reliably and cost effectively, while providing the flexibility to meet their future growth requirements. The solution included IP-enabling their Nortel Meridian 1 PBX and deploying Nortel IP Phone 2004, Passport 8600 Routing Switches, and Business Policy Switch 2000s.

Tags: Switching, Quality of Service		   
whitepaper Pricing Differentiated Services: A Game-Theoretic Approach2007-01-01 French National Institute for Research in Computer Science and Control
  The goal of this paper is to study pricing of differentiated services and its impact on the choice of service priority at equilibrium. The paper considers both TCP connections as well as non controlled (real time) connections. The performance measures (such as throughput and loss rates) are determined according to the operational parameters of a RED buffer management. The latter is assumed to be able to give differentiated services to the applications according to their choice of service class. The paper considers a best effort type of service differentiation where the QoS of connections is not guaranteed, but by choosing a better (more expensive) service class, the QoS parameters of a session can improve (as long as the service class of other sessions are fixed).

Tags: TCP - IP		   


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