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Title Date Added Company

Hierarchical Placement and Network Design Problems 2007-01-01 Stanford University

This paper gives the first constant-approximations for a number of layered network design problems. It begins by modeling hierarchical caching, where caches are placed in layers and each layer satisfies a fixed percentage of the demand (bounded miss rates). The paper presents a constant approximation to the minimum total cost of placing the caches and routing demand through the layers. This model is extended to cover more general layered caching scenarios, giving a constant combinatorial approximation to the well studied multi-level facility location problem. This paper considers a facility location variant, the Load Balanced Facility Location problem in which every demand is served by a unique facility and each open facility must serve at least a certain amount of demand.

Nortel Network Case Study: Bharti Airtel Limited 2007-01-01 Nortel Networks

Bharti Airtel Limited (previously called Bharti Tele-Ventures) is one of India's leading private sector providers of telecommunications services, delivering mobile, broadband and telephony, and enterprise services to more than 19.74 million customers, including more than 18.45 million GSM mobile subscribers. Bharti has a firm commitment to growth and, through a highly cost-effective outsourcing business model, aims to differentiate itself in India's highly competitive communications environment by ensuring customer delight through personalized customer service. The Nortel solution includes: a 24x7 "Virtual storefront" voice portal based on the Nortel Interactive Voice Response (IVR) solution; and a Network Operations Center (NOC) in New Delhi to provide network design, integration, support and maintenance services for Bharti's contact center architecture.

Tags: GSM

Valencia Speeds Healthcare With Connected Imaging Solution 2007-01-01 Cisco Systems

Valencia Health Ministry wanted to provide wide-area access to radiological and other specialised medical imaging types and create Electronic Patient Records (EPR) with access to diagnostic images and medical history. The challenge was to ensure conformity with EU regulatory requirements on patient confidentiality. ARTERIAS - an end-to-end network covering entire Valencia healthcare region, used the Cisco Medical-Grade Network (MGN) framework. There were high-speed links between local clinics and reference hospitals with image repository and innovative imaging platform combining radiology with other diagnostic modalities.

Tags: Network Administration

Seamless Physical and Virtual Server Management: An Integrated Management Approach 2007-02-06 16:33:35 Opsware

Once proven in an enterprise environment, virtualization, like any successful technology, spreads quickly. For every physical server under management there may be three or four virtual servers running, but there are likely many more unmanaged and unmonitored virtual servers out there. Download this Opsware white paper to read more about the special management challenges that are part and parcel of virtual environments and to find out how you can better integrate physical and virtual server management.

Global Banking and Financial Services Firm Drives Down Cost, Risk, and Complexity with Azul Compute Appliances 2007-01-30 15:00:30 Azul Systems

This case study explains how a leading financial services firm solved the performance problems that plagued its Java-based trading applications. The paper describes the problems the bank was having and explains why the company was looking for a solution that could:

Deliver extraordinary performance and scalability

Eliminate application memory constraints

Readily integrate into its existing IT environment

Download the paper to learn why the bank ultimately chose Azul Compute Appliances and to find out how the solution is helping the firm drive down cost, risk, and complexity.

Reduce Costs, Minimize Risk and Improve Network Performance with Managed Services 2007-05-11 11:27:50 Siemens

Managed services are among the fastest growing segments of the IT/networking industry. This THINKstrategies white paper shows how enterprises can leverage managed services to:

Reduce costs

Minimize risk

Improve network performance

Understanding Systems Management and Deployment Automation 2006-12-12 18:32:48 KACE

As your organization grows, systems management and provisioning isn't going to get any easier - if you follow traditional processes. The right tool can make implementing best practices much easier, but which methodology and features should you look for? Using an Appliance-based Delivery (AbSD) architecture, you can address the issues many mid-sized enterprises face in systems management such as hardware and software inventory, distributing software, patch management, scripting and security management, along with systems provisioning issues around disk imaging, installation, remote systems recovery and application slip streaming. Review this Flash demonstration of tools used to implement best practices for IT Automation.

Bandwidth Sharing Network Design for Multi-Class Traffic 2006-12-09 01:00:17 Alcatel-Lucent

With the increasing commercial interest in supporting voice and multimedia services over the IP network there is a need for bandwidth guaranteed services. For example, guaranteeing the peak demand of VoIP traffic entails high costs in terms of bandwidth reservation requirements. To effectively make use of the reserved peak bandwidth, it is imperative that this bandwidth is shared with best effort data traffic during non peak periods. This paper formulates this bandwidth sharing network design problem. The goal is to minimize the total cost of bandwidth reservation while satisfying the peak demand for real time traffic, and the average demand of both real time and best effort data traffic.

Designing Networks to Support Fast Restoration 2006-12-09 01:00:18 Alcatel-Lucent

This paper studies a problem motivated by a scheme for supporting fast restoration in Multi-Protocol Label Switched (MPLS) and Optical networks. In this local restoration scheme detour paths are set-up a priori and network resources are pre-reserved exclusively for carrying rerouted traffic under network failures (i.e. they do not carry any traffic under normal working conditions). The detours are such that failed links can be bypassed locally from the first node that is upstream from the failures. This local bypass activation from the first detection point for failures along with the dedication of network resources for handling failures permits very fast recovery times, a critical requirement for these networks.

Complexity of Wavelength Assignment in Optical Network Optimization 2006-12-09 01:00:18 Alcatel-Lucent

This paper studies the complexity of a spectrum of design problems for optical networks in order to carry a set of demands. Under Wavelength Division Multiplexing (WDM) technology, demands sharing a common fiber are transported on distinct wavelengths. Multiple fibers may be deployed on a physical link. The basic goal is to design networks of minimum cost, minimum congestion and maximum throughput.

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Title	Date Added	Company
Hierarchical Placement and Network Design Problems	2007-01-01	Stanford University
This paper gives the first constant-approximations for a number of layered network design problems. It begins by modeling hierarchical caching, where caches are placed in layers and each layer satisfies a fixed percentage of the demand (bounded miss rates). The paper presents a constant approximation to the minimum total cost of placing the caches and routing demand through the layers. This model is extended to cover more general layered caching scenarios, giving a constant combinatorial approximation to the well studied multi-level facility location problem. This paper considers a facility location variant, the Load Balanced Facility Location problem in which every demand is served by a unique facility and each open facility must serve at least a certain amount of demand.
Nortel Network Case Study: Bharti Airtel Limited	2007-01-01	Nortel Networks
Bharti Airtel Limited (previously called Bharti Tele-Ventures) is one of India's leading private sector providers of telecommunications services, delivering mobile, broadband and telephony, and enterprise services to more than 19.74 million customers, including more than 18.45 million GSM mobile subscribers. Bharti has a firm commitment to growth and, through a highly cost-effective outsourcing business model, aims to differentiate itself in India's highly competitive communications environment by ensuring customer delight through personalized customer service. The Nortel solution includes: a 24x7 "Virtual storefront" voice portal based on the Nortel Interactive Voice Response (IVR) solution; and a Network Operations Center (NOC) in New Delhi to provide network design, integration, support and maintenance services for Bharti's contact center architecture. Tags: GSM
Valencia Speeds Healthcare With Connected Imaging Solution	2007-01-01	Cisco Systems
Valencia Health Ministry wanted to provide wide-area access to radiological and other specialised medical imaging types and create Electronic Patient Records (EPR) with access to diagnostic images and medical history. The challenge was to ensure conformity with EU regulatory requirements on patient confidentiality. ARTERIAS - an end-to-end network covering entire Valencia healthcare region, used the Cisco Medical-Grade Network (MGN) framework. There were high-speed links between local clinics and reference hospitals with image repository and innovative imaging platform combining radiology with other diagnostic modalities. Tags: Network Administration
Seamless Physical and Virtual Server Management: An Integrated Management Approach	2007-02-06 16:33:35	Opsware
Once proven in an enterprise environment, virtualization, like any successful technology, spreads quickly. For every physical server under management there may be three or four virtual servers running, but there are likely many more unmanaged and unmonitored virtual servers out there. Download this Opsware white paper to read more about the special management challenges that are part and parcel of virtual environments and to find out how you can better integrate physical and virtual server management.
Global Banking and Financial Services Firm Drives Down Cost, Risk, and Complexity with Azul Compute Appliances	2007-01-30 15:00:30	Azul Systems
This case study explains how a leading financial services firm solved the performance problems that plagued its Java-based trading applications. The paper describes the problems the bank was having and explains why the company was looking for a solution that could: Deliver extraordinary performance and scalability Eliminate application memory constraints Readily integrate into its existing IT environment Download the paper to learn why the bank ultimately chose Azul Compute Appliances and to find out how the solution is helping the firm drive down cost, risk, and complexity.
Reduce Costs, Minimize Risk and Improve Network Performance with Managed Services	2007-05-11 11:27:50	Siemens
Managed services are among the fastest growing segments of the IT/networking industry. This THINKstrategies white paper shows how enterprises can leverage managed services to: Reduce costs Minimize risk Improve network performance
Understanding Systems Management and Deployment Automation	2006-12-12 18:32:48	KACE
As your organization grows, systems management and provisioning isn't going to get any easier - if you follow traditional processes. The right tool can make implementing best practices much easier, but which methodology and features should you look for? Using an Appliance-based Delivery (AbSD) architecture, you can address the issues many mid-sized enterprises face in systems management such as hardware and software inventory, distributing software, patch management, scripting and security management, along with systems provisioning issues around disk imaging, installation, remote systems recovery and application slip streaming. Review this Flash demonstration of tools used to implement best practices for IT Automation.
Bandwidth Sharing Network Design for Multi-Class Traffic	2006-12-09 01:00:17	Alcatel-Lucent
With the increasing commercial interest in supporting voice and multimedia services over the IP network there is a need for bandwidth guaranteed services. For example, guaranteeing the peak demand of VoIP traffic entails high costs in terms of bandwidth reservation requirements. To effectively make use of the reserved peak bandwidth, it is imperative that this bandwidth is shared with best effort data traffic during non peak periods. This paper formulates this bandwidth sharing network design problem. The goal is to minimize the total cost of bandwidth reservation while satisfying the peak demand for real time traffic, and the average demand of both real time and best effort data traffic.
Designing Networks to Support Fast Restoration	2006-12-09 01:00:18	Alcatel-Lucent
This paper studies a problem motivated by a scheme for supporting fast restoration in Multi-Protocol Label Switched (MPLS) and Optical networks. In this local restoration scheme detour paths are set-up a priori and network resources are pre-reserved exclusively for carrying rerouted traffic under network failures (i.e. they do not carry any traffic under normal working conditions). The detours are such that failed links can be bypassed locally from the first node that is upstream from the failures. This local bypass activation from the first detection point for failures along with the dedication of network resources for handling failures permits very fast recovery times, a critical requirement for these networks.
Complexity of Wavelength Assignment in Optical Network Optimization	2006-12-09 01:00:18	Alcatel-Lucent
This paper studies the complexity of a spectrum of design problems for optical networks in order to carry a set of demands. Under Wavelength Division Multiplexing (WDM) technology, demands sharing a common fiber are transported on distinct wavelengths. Multiple fibers may be deployed on a physical link. The basic goal is to design networks of minimum cost, minimum congestion and maximum throughput.