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Deutsche Telekom
(24 results)-
White Papers
Improving Network Troubleshooting Using Virtualization
May 19, 2008, 12:00am PDT
Diagnosing problems, deploying new services, testing protocol interactions, or validating network configurations are hard problems in today's Internet. This paper proposes to leverage the concept...
Provided by Deutsche Telekom
-
White Papers
Online Strategies for Intra and Inter Provider Service Migration in Virtual Networks
March 4, 2011, 12:00am PST
Network virtualization allows one to build dynamic distributed systems in which resources can be dynamically allocated at locations where they are most useful. In order to fully exploit the...
Provided by Deutsche Telekom
-
White Papers
OFRewind: Enabling Record and Replay Troubleshooting for Networks
April 27, 2011, 12:00am PDT
Debugging operational networks can be a daunting task, due to their size, distributed state, and the presence of black box components such as commercial routers and switches, which are poorly...
Provided by Deutsche Telekom
-
Whitepapers
Same But Different? - Using Speech Signal Features for Comparing Conversational VoIP Quality Studies
May 24, 2012, 12:00am PDT
In this paper, the authors demonstrate how speech signal features can be used to detect and explain differences in human to human conversation tests. To this end, they compare the results of two...
Provided by Deutsche Telekom
-
Whitepapers
LENS: LEveraging Anti-Social Networking Against Spam
May 15, 2010, 12:00am PDT
Spam is still an open problem from the network operator's perspective. The common state-of-the-art strategy to place filters against spam is at the recipient's edge. Although, this strategy...
Provided by Deutsche Telekom
-
Whitepapers
Energy Conservation in Multi-Tenant Networks Through Power Virtualization
October 3, 2010, 12:00am PDT
In the service-centric Internet, multiple virtual services (tenants) are over-layed on top of the same infrastructure (both in wide-area networks and in datacenter networks). The authors propose...
Provided by Deutsche Telekom
-
White Papers
Can the Production Network Be the Testbed?
September 24, 2010, 12:00am PDT
A persistent problem in computer network research is validation. When deciding how to evaluate a new feature or bug fix, a researcher or operator must trade-off realism (in terms of scale, actual...
Provided by Deutsche Telekom
-
White Papers
Competitive and Deterministic Embeddings of Virtual Networks
January 28, 2011, 12:00am PST
Network virtualization is a paradigm that allows for flexible and efficient allocation of the resources among multiple Virtual Networks (VNets). In this paper, the authors deal with the problem of...
Provided by Deutsche Telekom
-
White Papers
An On-Demand Scheduling Mechanism for TDMA Based Wireless Mesh Networks
October 10, 2008, 12:00am PDT
Wireless Mesh Networks (WMNs) are seen as a means for providing last mile connections in a flexible and cost effective manner, due to the multi-hop as well as self-configuration and...
Provided by Deutsche Telekom
-
White Papers
Intelligent Selection of Access Nodes for Multi-Interface Mobile Terminals
January 1, 2011, 12:00am PST
This paper tackles the problems of intelligent interface selection for mobile terminals connected to Fixed & Mobile Converged (FMC) network and equipped with multiple network interfaces of...
Provided by Deutsche Telekom
-
White Papers
QoS Provisioning in WLAN Mesh Networks Using Dynamic Bandwidth Control
January 28, 2008, 12:00am PST
WLAN, based on the IEEE 802.11 standard has been extensively studied since its release. In addition to infrastructure access to WLAN, mesh networks currently attract a lot of attention. This comes...
Provided by Deutsche Telekom
-
White Papers
Design of a Configurable Wireless Network Testbed With Live Traffic
September 24, 2010, 12:00am PDT
Testbeds have become standard tools for performance evaluation in wireless networks as they allow for evaluation with realistic wireless propagation and interference conditions, hardware...
Provided by Deutsche Telekom
-
White Papers
TCPSpeaker: Clean and Dirty Sides of the Same Slate
October 13, 2010, 12:00am PDT
The performance and fairness problems of TCP in 802.11 multi-hop Wireless Mesh Networks (WMN). Approaches to solve them fall roughly into two different categories: those which maintain legacy TCP...
Provided by Deutsche Telekom
-
White Papers
A Nash Equilibrium Analysis for Interference Coupled Wireless Systems
February 8, 2010, 12:00am PST
This paper studies the properties of Nash equilibrium for non-cooperative games in interference coupled wireless systems, where it serves as an incentive-compatible solution concept and an...
Provided by Deutsche Telekom
-
White Papers
Adaptive Wireless Services for Augmented Environments
June 4, 2009, 12:00am PDT
This paper presents a system that combines mobile services, ubiquitous computing, and augmented reality concepts in order to bring the kind of information-rich environment, which is currently...
Provided by Deutsche Telekom
-
White Papers
A Decentralized Bayesian Attack Detection Algorithm for Network Security
April 17, 2008, 12:00am PDT
Decentralized detection has been an active area of research since the late 1970s. Its earlier application area has been distributed radar systems, and more recently it has found applications in...
Provided by Deutsche Telekom
-
White Papers
Optimal and Robust Epidemic Response for Multiple Networks
October 7, 2008, 12:00am PDT
This paper studies the optimization of malicious software removal or patch deployment processes across multiple networks. The well-known classical epidemic model is adapted to model malware...
Provided by Deutsche Telekom
-
White Papers
Distributed and Robust Rate Control for Communication Networks
July 7, 2009, 12:00am PDT
Contemporary networks are distributed, complex, and heterogeneous. Ensuring an efficient, fair, and incentive-compatible allocation of bandwidth among their users constitutes a challenging and...
Provided by Deutsche Telekom
-
White Papers
A Case for P2P Infrastructure for Social Networks - Opportunities & Challenges
December 9, 2008, 12:00am PST
Online Social Networks like Facebook, MySpace, Xing, etc. have become extremely popular. Yet they have some limitations that the authors want to overcome for a next generation of social networks:...
Provided by Deutsche Telekom
-
White Papers
Enabling Secure Secret Sharing in Distributed Online Social Networks
September 25, 2009, 12:00am PDT
The authors study a new application of threshold-based secret sharing in a Distributed Online Social Network (DOSN), where users need a means to back up and recover their private keys in a network...
Provided by Deutsche Telekom
-
White Papers
Delay-Tolerant Social Networking
May 2, 2009, 12:00am PDT
To address privacy concerns in current online social networks, the authors previously proposed to use a peer-to-peer infrastructure and encryption, thereby recreating the features of online social...
Provided by Deutsche Telekom
-
White Papers
Real World Routing Using Virtual World Information
July 9, 2009, 12:00am PDT
In this paper, the authors propose to leverage social graphs from Online Social Networks (OSN) to improve the forwarding efficiency of mobile networks, more particularly Delay Tolerant Networks...
Provided by Deutsche Telekom
-
White Papers
Fair Performance Comparison Between CQI- And CSI-Based MU-MIMO for the LTE Downlink
February 22, 2010, 12:00am PST
The authors compare the performance of the downlink of a 3GPP UTRAN Long Term Evolution (LTE) system with MultiUser (MU) Multiple Input Multiple Output (MIMO) support and Channel State Information...
Provided by Deutsche Telekom
-
White Papers
Coordinated Multipoint Trials in the Downlink
September 16, 2009, 12:00am PDT
Coordinated Multi-Point (CoMP) is a new class of transmission schemes for interference reduction in the next generation of mobile networks. The authors have implemented and tested a distributed...
Provided by Deutsche Telekom AG
-
Whitepapers
Energy Conservation in Multi-Tenant Networks Through Power Virtualization
October 3, 2010, 12:00am PDT
In the service-centric Internet, multiple virtual services (tenants) are over-layed on top of the same infrastructure (both in wide-area networks and in datacenter networks). The authors propose...
Provided by Deutsche Telekom
-
Whitepapers
LENS: LEveraging Anti-Social Networking Against Spam
May 15, 2010, 12:00am PDT
Spam is still an open problem from the network operator's perspective. The common state-of-the-art strategy to place filters against spam is at the recipient's edge. Although, this strategy...
Provided by Deutsche Telekom
-
Whitepapers
Same But Different? - Using Speech Signal Features for Comparing Conversational VoIP Quality Studies
May 24, 2012, 12:00am PDT
In this paper, the authors demonstrate how speech signal features can be used to detect and explain differences in human to human conversation tests. To this end, they compare the results of two...
Provided by Deutsche Telekom
-
White Papers
Coordinated Multipoint Trials in the Downlink
September 16, 2009, 12:00am PDT
Coordinated Multi-Point (CoMP) is a new class of transmission schemes for interference reduction in the next generation of mobile networks. The authors have implemented and tested a distributed...
Provided by Deutsche Telekom AG
-
White Papers
Fair Performance Comparison Between CQI- And CSI-Based MU-MIMO for the LTE Downlink
February 22, 2010, 12:00am PST
The authors compare the performance of the downlink of a 3GPP UTRAN Long Term Evolution (LTE) system with MultiUser (MU) Multiple Input Multiple Output (MIMO) support and Channel State Information...
Provided by Deutsche Telekom
-
White Papers
Real World Routing Using Virtual World Information
July 9, 2009, 12:00am PDT
In this paper, the authors propose to leverage social graphs from Online Social Networks (OSN) to improve the forwarding efficiency of mobile networks, more particularly Delay Tolerant Networks...
Provided by Deutsche Telekom
-
White Papers
Delay-Tolerant Social Networking
May 2, 2009, 12:00am PDT
To address privacy concerns in current online social networks, the authors previously proposed to use a peer-to-peer infrastructure and encryption, thereby recreating the features of online social...
Provided by Deutsche Telekom
-
White Papers
Enabling Secure Secret Sharing in Distributed Online Social Networks
September 25, 2009, 12:00am PDT
The authors study a new application of threshold-based secret sharing in a Distributed Online Social Network (DOSN), where users need a means to back up and recover their private keys in a network...
Provided by Deutsche Telekom
-
White Papers
A Case for P2P Infrastructure for Social Networks - Opportunities & Challenges
December 9, 2008, 12:00am PST
Online Social Networks like Facebook, MySpace, Xing, etc. have become extremely popular. Yet they have some limitations that the authors want to overcome for a next generation of social networks:...
Provided by Deutsche Telekom
-
White Papers
Distributed and Robust Rate Control for Communication Networks
July 7, 2009, 12:00am PDT
Contemporary networks are distributed, complex, and heterogeneous. Ensuring an efficient, fair, and incentive-compatible allocation of bandwidth among their users constitutes a challenging and...
Provided by Deutsche Telekom
-
White Papers
Optimal and Robust Epidemic Response for Multiple Networks
October 7, 2008, 12:00am PDT
This paper studies the optimization of malicious software removal or patch deployment processes across multiple networks. The well-known classical epidemic model is adapted to model malware...
Provided by Deutsche Telekom
-
White Papers
A Decentralized Bayesian Attack Detection Algorithm for Network Security
April 17, 2008, 12:00am PDT
Decentralized detection has been an active area of research since the late 1970s. Its earlier application area has been distributed radar systems, and more recently it has found applications in...
Provided by Deutsche Telekom
-
White Papers
Adaptive Wireless Services for Augmented Environments
June 4, 2009, 12:00am PDT
This paper presents a system that combines mobile services, ubiquitous computing, and augmented reality concepts in order to bring the kind of information-rich environment, which is currently...
Provided by Deutsche Telekom
-
White Papers
A Nash Equilibrium Analysis for Interference Coupled Wireless Systems
February 8, 2010, 12:00am PST
This paper studies the properties of Nash equilibrium for non-cooperative games in interference coupled wireless systems, where it serves as an incentive-compatible solution concept and an...
Provided by Deutsche Telekom
-
White Papers
TCPSpeaker: Clean and Dirty Sides of the Same Slate
October 13, 2010, 12:00am PDT
The performance and fairness problems of TCP in 802.11 multi-hop Wireless Mesh Networks (WMN). Approaches to solve them fall roughly into two different categories: those which maintain legacy TCP...
Provided by Deutsche Telekom
-
White Papers
Design of a Configurable Wireless Network Testbed With Live Traffic
September 24, 2010, 12:00am PDT
Testbeds have become standard tools for performance evaluation in wireless networks as they allow for evaluation with realistic wireless propagation and interference conditions, hardware...
Provided by Deutsche Telekom
-
White Papers
QoS Provisioning in WLAN Mesh Networks Using Dynamic Bandwidth Control
January 28, 2008, 12:00am PST
WLAN, based on the IEEE 802.11 standard has been extensively studied since its release. In addition to infrastructure access to WLAN, mesh networks currently attract a lot of attention. This comes...
Provided by Deutsche Telekom
-
White Papers
Intelligent Selection of Access Nodes for Multi-Interface Mobile Terminals
January 1, 2011, 12:00am PST
This paper tackles the problems of intelligent interface selection for mobile terminals connected to Fixed & Mobile Converged (FMC) network and equipped with multiple network interfaces of...
Provided by Deutsche Telekom
-
White Papers
An On-Demand Scheduling Mechanism for TDMA Based Wireless Mesh Networks
October 10, 2008, 12:00am PDT
Wireless Mesh Networks (WMNs) are seen as a means for providing last mile connections in a flexible and cost effective manner, due to the multi-hop as well as self-configuration and...
Provided by Deutsche Telekom
-
White Papers
Competitive and Deterministic Embeddings of Virtual Networks
January 28, 2011, 12:00am PST
Network virtualization is a paradigm that allows for flexible and efficient allocation of the resources among multiple Virtual Networks (VNets). In this paper, the authors deal with the problem of...
Provided by Deutsche Telekom
-
White Papers
Can the Production Network Be the Testbed?
September 24, 2010, 12:00am PDT
A persistent problem in computer network research is validation. When deciding how to evaluate a new feature or bug fix, a researcher or operator must trade-off realism (in terms of scale, actual...
Provided by Deutsche Telekom
-
White Papers
OFRewind: Enabling Record and Replay Troubleshooting for Networks
April 27, 2011, 12:00am PDT
Debugging operational networks can be a daunting task, due to their size, distributed state, and the presence of black box components such as commercial routers and switches, which are poorly...
Provided by Deutsche Telekom
-
White Papers
Online Strategies for Intra and Inter Provider Service Migration in Virtual Networks
March 4, 2011, 12:00am PST
Network virtualization allows one to build dynamic distributed systems in which resources can be dynamically allocated at locations where they are most useful. In order to fully exploit the...
Provided by Deutsche Telekom
-
White Papers
Improving Network Troubleshooting Using Virtualization
May 19, 2008, 12:00am PDT
Diagnosing problems, deploying new services, testing protocol interactions, or validating network configurations are hard problems in today's Internet. This paper proposes to leverage the concept...
Provided by Deutsche Telekom
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