Tampere University of Technology

Displaying 1-27 of 27 results

  • White Papers // Feb 2012

    Performance Evaluation of Time-Multiplexed and Data-Dependent Superimposed Training Based Transmission With Practical Power Amplifier Model

    The increase in the Peak-to-Average Power Ratio (PAPR) is a well known but not sufficiently addressed problem with Data-Dependent Superimposed Training (DDST) based approaches for channel estimation and synchronization in digital communication links. In this paper, the authors concentrate on the PAPR analysis with DDST and on the spectral regrowth...

    Provided By Tampere University of Technology

  • White Papers // Dec 2011

    Reliability of WSN Hardware

    Wireless Sensor Network (WSN) is an important wireless technology that has wide variety of applications and provides unlimited future potentials. WSN hardware presents some unique reliability challenges, which arise from the nature of WSNs themselves. In this paper, two possible methods, standards based reliability prediction and accelerated testing of WSN...

    Provided By Tampere University of Technology

  • White Papers // May 2011

    Distance Distributions in Random Networks

    Spatial point processes have been used in many branches of science to model various environmental phenomena. These areas include forestry, technology, geodesy, military applications and many more. Over more than one hundred years of extensive research and applications a lot of processes have been introduced and studied in detail. These...

    Provided By Tampere University of Technology

  • White Papers // Apr 2011

    Synchronous Relaying in Vehicular Ad-Hoc Networks

    In this paper, the authors propose a simple concept for emergency information dissemination in vehicular ad-hoc networks. Instead of competing for the shared wireless medium when transmitting the emergency information as proposed by many authors, they require nodes to cooperate by synchronizing their transmissions. The proposed scheme is backward compatible...

    Provided By Tampere University of Technology

  • White Papers // Mar 2011

    Security Vulnerabilities of Network Coding

    It is already around ten years since the network coding paradigm has been introduced as a new communication approach with the aim of improving the performance of network protocols by breaking the rule of traditional store and forward approach and allowing intermediate nodes to encode received packets before forwarding them...

    Provided By Tampere University of Technology

  • White Papers // Mar 2011

    Model-Based Testing With a General Purpose Keyword-Driven Test Automation Framework

    Model-Based Testing (MBT) is a relatively new approach to software testing that extends test automation from test execution to test design using automatic test generation from models. The effective use of the new approach requires new skills and knowledge, such as test modeling skills, but also good tool support. This...

    Provided By Tampere University of Technology

  • White Papers // Feb 2011

    Efficient Control Channel Resource Allocation for VoIP in OFDMA-Based Packet Radio Networks

    The authors propose an efficient control channel resource allocation approach to enhance the performance of Voice-over-IP (VoIP) in Orthogonal Frequency Division Multiple Access- (OFDMA-) based next generation mobile communication systems. As the Long-Term Evolution (LTE) of Universal Terrestrial Radio Access Network (UTRAN), Evolved UTRAN (E-UTRAN) is the first OFDMA-based packet...

    Provided By Tampere University of Technology

  • White Papers // Feb 2011

    Information Delivery in Delay Tolerant Networks

    Modern Internet protocols demonstrate inefficient performance in those networks where the connectivity between end nodes has intermittent property due to dynamic topology or resource constraints. Network environments where the nodes are characterized by opportunistic connectivity are referred to as Delay Tolerant Networks (DTNs). Because of numerous applications such as low-density...

    Provided By Tampere University of Technology

  • White Papers // Dec 2010

    OCP-IP Network-on-Chip Benchmarking Workgroup

    This article presents a summary of the work and infrastructure developed by the OCP-IP Network-on-Chip benchmarking workgroup. Network-on-chip (NoC) is an emerging paradigm for interconnecting resources in a complex integrated circuit. However, despite numerous published research efforts, no common NoC benchmarks are yet available. Unfortunately, this makes it very hard...

    Provided By Tampere University of Technology

  • White Papers // Nov 2010

    Service Quality in P2P Streaming Systems

    Relying on end users to contribute bandwidth to the system Peer-To-Peer (P2P) overlays provide a cheap and scalable way to distribute live video content in the Internet. However, being inherently dynamic due to peers joining and leaving the system at arbitrary time and running over the best-effort Internet successful commercial...

    Provided By Tampere University of Technology

  • White Papers // Oct 2010

    Advanced Multipath Mitigation Techniques for Satellite-Based Positioning Applications

    Multipath remains a dominant source of ranging errors in Global Navigation Satellite Systems (GNSS), such as the Global Positioning System (GPS) or the future European satellite navigation system Galileo. Multipath is generally considered undesirable in the context of GNSS, since the reception of multipath can make significant distortion to the...

    Provided By Tampere University of Technology

  • White Papers // Oct 2010

    RC5-Based Security in Wireless Sensor Networks: Utilization and Performance

    Information transferred in a wireless sensor network can be sensitive, hence it is vital to secure the data on the network. Enhancing the network's security affects the network operation, by increasing the data's handling time. In this paper, the trade-offs between enhanced security and sensor network performance is discussed. The...

    Provided By Tampere University of Technology

  • White Papers // Sep 2010

    Aggregated and Per-Source Performance Modeling for Broadband Wireless Channels

    Modern broadband wireless systems, such as IEEE 802.16, are designed to multiplex a number of traffic streams into a single bundle for further transmission over the wireless medium. Since these traffic streams can be heterogenous in nature and have different Quality of Service (QoS) requirements, their performance at the wireless...

    Provided By Tampere University of Technology

  • White Papers // Aug 2010

    The Influence Of Personality On The Job Performance Of Key Account Managers

    Key Account Management (KAM) is a current and relevant topic in the Business to Business marketing context. KAM consists of identifying and serving the strategically important customers of the company. Although KAM is widely studied, less attention has been paid on the essential ingredient of the KAM; the Key Account...

    Provided By Tampere University of Technology

  • White Papers // Aug 2010

    Enabling Innovations In A Commercial Virtual Organization

    Innovations help position a company in an uncontested market space. According to the open innovation's principles, innovations are not only gained through the research and development activities of a company. An employee's innovative behavior is supported by knowledge diffusion mechanisms and also by leadership practices. This single paper aimed at...

    Provided By Tampere University of Technology

  • White Papers // Aug 2010

    The Role Of Experts In Creating Customer Value - Renovation Of Housing Company

    Inexperienced people carrying out the renovation can 'Ruin' the whole project and the residents feel they did not receive value for their investment. Lack of necessary knowledge of renovations, resources and time has driven the board members of housing companies and house managers to find outside help. The paper concentrates...

    Provided By Tampere University of Technology

  • White Papers // Aug 2010

    The Account Manager's Role In Value Co-Creation: Building Co-Operative Relationships Between Banks And SMEs

    The purpose of this paper is to evaluate the role of the account manager in co-creating value with their corporate customers. The authors focus on the relationship between account managers and Small and Medium sized Enterprises (SMEs). They suggest that since SMEs posses relatively less knowledge about financial services compared...

    Provided By Tampere University of Technology

  • White Papers // Aug 2010

    The Requirements For A SME Heading To Integrated Solution Sales

    For growing number of firms which have earlier relied on their product and manufacturing based approaches, the combinations of products, services, and for example software are becoming an essential part of their growth or survival strategies. These large and complicated packages are called integrated solutions. In this paper the authors...

    Provided By Tampere University of Technology

  • White Papers // Aug 2010

    Making Strategic Decisions In The Changing Networks - Observations From The Scandinavian Flat Glass Industry

    The paper focuses on the strategic decision making in the situation where the radical technological change is reshaping the network structure dramatically. Especially, the focus is on the situation where the companies are losing their competitiveness and markets as a result of the network evolution (Scandinavian flat glass industry 1960-1980)....

    Provided By Tampere University of Technology

  • White Papers // Aug 2010

    Semi-Blind Two-Dimensional Code Acquisition in CDMA Communications

    In this paper, the authors propose a new algorithm for joint time-delay and Direction-Of-Arrival (DOA) estimation, here called two-dimensional code acquisition, in an asynchronous Direct-Sequence Code-Division Multiple-Access (DS-CDMA) array system. This algorithm depends on eigenvector-eigenvalue decomposition of sample correlation matrix, and requires knowing desired user's training sequence. The performance of...

    Provided By Tampere University of Technology

  • White Papers // Jul 2010

    The Development Of Industrial Buyer-Seller Relationships In A Chinese Context

    The purpose of the paper is to illustrate how industrial buyer-seller relationships develop outside the Western World, especially in the case of China. Hence, the paper will address the current industrial buyer-seller relationship process models and guanxi and its development. The paper studies four case relationships between a Chinese industrial...

    Provided By Tampere University of Technology

  • White Papers // May 2010

    A Study of TCP Performance in Wireless Environment Using Fixed-Point Approximation

    Loss of IP packets occurring as a result of imperfect local error correction is one of the major reasons for TCP performance degradation in wireless networks. These losses are misinterpreted by TCP senders as congestion indications and subsequently lead to the sharp decrease of the sending rate. In addition to...

    Provided By Tampere University of Technology

  • White Papers // Mar 2010

    Implementation and Performance Evaluation of Multicast Control Protocol

    This paper introduced the framework of the authors' MCOP implementation in Linux environment and proposed some implementation specific features that enhance the MCOP performance. Their evaluation clarified that MCOP is working effectively and in a scalable way. MCOP is traffic controlling protocol and is able to cooperate with plenty of...

    Provided By Tampere University of Technology

  • White Papers // Sep 2008

    Beyond Connectivity: Future Issues in Exchanging User-Created Content Among Broadband Families and Household Communities

    Home users form the largest proportion of Internet users globally today. With decreasing costs for broadband adoption and increasing speeds, wireless home networks have become prevalent. Coupled with portable devices and large storage capacities, the authors find that current methods of user created content sharing for families and small communities...

    Provided By Tampere University of Technology

  • White Papers // Sep 2008

    Compression of Cyclic Time Series Data

    This paper describes a method to reduce the space of stored indicator time series data collected from a telecommunications network. The method takes advantage of the cyclic nature of the collected time series and behavioral clusters of the network elements. The method separates the shape of the daily activity cycle...

    Provided By Tampere University of Technology

  • White Papers // Aug 2008

    Anomaly Detection Algorithm Test Bench for Mobile Network Management

    Huge amounts of operation data are constantly collected from the performance monitoring and system logs from servers in communication networks. One of the key applications for system operators is to detect anomalies in the data. The anomalies may indicate various types of situations that need attention. They can be results...

    Provided By Tampere University of Technology

  • White Papers // Aug 2008

    Deployment of Mobile WiMAX in Urban Environment

    The purpose of this paper is to compare different Mobile WiMAX radio network deployment strategies. The evaluation is carried out with extensive Monte Carlo simulations using two different strategies for both network topology and frequency planning. The purpose of the simulations is to evaluate whether WiMAX radio network should be...

    Provided By Tampere University of Technology

  • White Papers // Oct 2010

    Advanced Multipath Mitigation Techniques for Satellite-Based Positioning Applications

    Multipath remains a dominant source of ranging errors in Global Navigation Satellite Systems (GNSS), such as the Global Positioning System (GPS) or the future European satellite navigation system Galileo. Multipath is generally considered undesirable in the context of GNSS, since the reception of multipath can make significant distortion to the...

    Provided By Tampere University of Technology

  • White Papers // Aug 2008

    Deployment of Mobile WiMAX in Urban Environment

    The purpose of this paper is to compare different Mobile WiMAX radio network deployment strategies. The evaluation is carried out with extensive Monte Carlo simulations using two different strategies for both network topology and frequency planning. The purpose of the simulations is to evaluate whether WiMAX radio network should be...

    Provided By Tampere University of Technology

  • White Papers // Sep 2008

    Compression of Cyclic Time Series Data

    This paper describes a method to reduce the space of stored indicator time series data collected from a telecommunications network. The method takes advantage of the cyclic nature of the collected time series and behavioral clusters of the network elements. The method separates the shape of the daily activity cycle...

    Provided By Tampere University of Technology

  • White Papers // Aug 2008

    Anomaly Detection Algorithm Test Bench for Mobile Network Management

    Huge amounts of operation data are constantly collected from the performance monitoring and system logs from servers in communication networks. One of the key applications for system operators is to detect anomalies in the data. The anomalies may indicate various types of situations that need attention. They can be results...

    Provided By Tampere University of Technology

  • White Papers // Dec 2010

    OCP-IP Network-on-Chip Benchmarking Workgroup

    This article presents a summary of the work and infrastructure developed by the OCP-IP Network-on-Chip benchmarking workgroup. Network-on-chip (NoC) is an emerging paradigm for interconnecting resources in a complex integrated circuit. However, despite numerous published research efforts, no common NoC benchmarks are yet available. Unfortunately, this makes it very hard...

    Provided By Tampere University of Technology

  • White Papers // Aug 2010

    The Requirements For A SME Heading To Integrated Solution Sales

    For growing number of firms which have earlier relied on their product and manufacturing based approaches, the combinations of products, services, and for example software are becoming an essential part of their growth or survival strategies. These large and complicated packages are called integrated solutions. In this paper the authors...

    Provided By Tampere University of Technology

  • White Papers // Aug 2010

    The Influence Of Personality On The Job Performance Of Key Account Managers

    Key Account Management (KAM) is a current and relevant topic in the Business to Business marketing context. KAM consists of identifying and serving the strategically important customers of the company. Although KAM is widely studied, less attention has been paid on the essential ingredient of the KAM; the Key Account...

    Provided By Tampere University of Technology

  • White Papers // Aug 2010

    Enabling Innovations In A Commercial Virtual Organization

    Innovations help position a company in an uncontested market space. According to the open innovation's principles, innovations are not only gained through the research and development activities of a company. An employee's innovative behavior is supported by knowledge diffusion mechanisms and also by leadership practices. This single paper aimed at...

    Provided By Tampere University of Technology

  • White Papers // Aug 2010

    The Role Of Experts In Creating Customer Value - Renovation Of Housing Company

    Inexperienced people carrying out the renovation can 'Ruin' the whole project and the residents feel they did not receive value for their investment. Lack of necessary knowledge of renovations, resources and time has driven the board members of housing companies and house managers to find outside help. The paper concentrates...

    Provided By Tampere University of Technology

  • White Papers // Aug 2010

    The Account Manager's Role In Value Co-Creation: Building Co-Operative Relationships Between Banks And SMEs

    The purpose of this paper is to evaluate the role of the account manager in co-creating value with their corporate customers. The authors focus on the relationship between account managers and Small and Medium sized Enterprises (SMEs). They suggest that since SMEs posses relatively less knowledge about financial services compared...

    Provided By Tampere University of Technology

  • White Papers // Jul 2010

    The Development Of Industrial Buyer-Seller Relationships In A Chinese Context

    The purpose of the paper is to illustrate how industrial buyer-seller relationships develop outside the Western World, especially in the case of China. Hence, the paper will address the current industrial buyer-seller relationship process models and guanxi and its development. The paper studies four case relationships between a Chinese industrial...

    Provided By Tampere University of Technology

  • White Papers // Aug 2010

    Making Strategic Decisions In The Changing Networks - Observations From The Scandinavian Flat Glass Industry

    The paper focuses on the strategic decision making in the situation where the radical technological change is reshaping the network structure dramatically. Especially, the focus is on the situation where the companies are losing their competitiveness and markets as a result of the network evolution (Scandinavian flat glass industry 1960-1980)....

    Provided By Tampere University of Technology

  • White Papers // Aug 2010

    Semi-Blind Two-Dimensional Code Acquisition in CDMA Communications

    In this paper, the authors propose a new algorithm for joint time-delay and Direction-Of-Arrival (DOA) estimation, here called two-dimensional code acquisition, in an asynchronous Direct-Sequence Code-Division Multiple-Access (DS-CDMA) array system. This algorithm depends on eigenvector-eigenvalue decomposition of sample correlation matrix, and requires knowing desired user's training sequence. The performance of...

    Provided By Tampere University of Technology

  • White Papers // Sep 2008

    Beyond Connectivity: Future Issues in Exchanging User-Created Content Among Broadband Families and Household Communities

    Home users form the largest proportion of Internet users globally today. With decreasing costs for broadband adoption and increasing speeds, wireless home networks have become prevalent. Coupled with portable devices and large storage capacities, the authors find that current methods of user created content sharing for families and small communities...

    Provided By Tampere University of Technology

  • White Papers // Oct 2010

    RC5-Based Security in Wireless Sensor Networks: Utilization and Performance

    Information transferred in a wireless sensor network can be sensitive, hence it is vital to secure the data on the network. Enhancing the network's security affects the network operation, by increasing the data's handling time. In this paper, the trade-offs between enhanced security and sensor network performance is discussed. The...

    Provided By Tampere University of Technology

  • White Papers // Feb 2011

    Efficient Control Channel Resource Allocation for VoIP in OFDMA-Based Packet Radio Networks

    The authors propose an efficient control channel resource allocation approach to enhance the performance of Voice-over-IP (VoIP) in Orthogonal Frequency Division Multiple Access- (OFDMA-) based next generation mobile communication systems. As the Long-Term Evolution (LTE) of Universal Terrestrial Radio Access Network (UTRAN), Evolved UTRAN (E-UTRAN) is the first OFDMA-based packet...

    Provided By Tampere University of Technology

  • White Papers // May 2011

    Distance Distributions in Random Networks

    Spatial point processes have been used in many branches of science to model various environmental phenomena. These areas include forestry, technology, geodesy, military applications and many more. Over more than one hundred years of extensive research and applications a lot of processes have been introduced and studied in detail. These...

    Provided By Tampere University of Technology

  • White Papers // Mar 2011

    Security Vulnerabilities of Network Coding

    It is already around ten years since the network coding paradigm has been introduced as a new communication approach with the aim of improving the performance of network protocols by breaking the rule of traditional store and forward approach and allowing intermediate nodes to encode received packets before forwarding them...

    Provided By Tampere University of Technology

  • White Papers // Feb 2011

    Information Delivery in Delay Tolerant Networks

    Modern Internet protocols demonstrate inefficient performance in those networks where the connectivity between end nodes has intermittent property due to dynamic topology or resource constraints. Network environments where the nodes are characterized by opportunistic connectivity are referred to as Delay Tolerant Networks (DTNs). Because of numerous applications such as low-density...

    Provided By Tampere University of Technology

  • White Papers // Nov 2010

    Service Quality in P2P Streaming Systems

    Relying on end users to contribute bandwidth to the system Peer-To-Peer (P2P) overlays provide a cheap and scalable way to distribute live video content in the Internet. However, being inherently dynamic due to peers joining and leaving the system at arbitrary time and running over the best-effort Internet successful commercial...

    Provided By Tampere University of Technology

  • White Papers // Sep 2010

    Aggregated and Per-Source Performance Modeling for Broadband Wireless Channels

    Modern broadband wireless systems, such as IEEE 802.16, are designed to multiplex a number of traffic streams into a single bundle for further transmission over the wireless medium. Since these traffic streams can be heterogenous in nature and have different Quality of Service (QoS) requirements, their performance at the wireless...

    Provided By Tampere University of Technology

  • White Papers // Apr 2011

    Synchronous Relaying in Vehicular Ad-Hoc Networks

    In this paper, the authors propose a simple concept for emergency information dissemination in vehicular ad-hoc networks. Instead of competing for the shared wireless medium when transmitting the emergency information as proposed by many authors, they require nodes to cooperate by synchronizing their transmissions. The proposed scheme is backward compatible...

    Provided By Tampere University of Technology

  • White Papers // May 2010

    A Study of TCP Performance in Wireless Environment Using Fixed-Point Approximation

    Loss of IP packets occurring as a result of imperfect local error correction is one of the major reasons for TCP performance degradation in wireless networks. These losses are misinterpreted by TCP senders as congestion indications and subsequently lead to the sharp decrease of the sending rate. In addition to...

    Provided By Tampere University of Technology

  • White Papers // Dec 2011

    Reliability of WSN Hardware

    Wireless Sensor Network (WSN) is an important wireless technology that has wide variety of applications and provides unlimited future potentials. WSN hardware presents some unique reliability challenges, which arise from the nature of WSNs themselves. In this paper, two possible methods, standards based reliability prediction and accelerated testing of WSN...

    Provided By Tampere University of Technology

  • White Papers // Feb 2012

    Performance Evaluation of Time-Multiplexed and Data-Dependent Superimposed Training Based Transmission With Practical Power Amplifier Model

    The increase in the Peak-to-Average Power Ratio (PAPR) is a well known but not sufficiently addressed problem with Data-Dependent Superimposed Training (DDST) based approaches for channel estimation and synchronization in digital communication links. In this paper, the authors concentrate on the PAPR analysis with DDST and on the spectral regrowth...

    Provided By Tampere University of Technology

  • White Papers // Mar 2011

    Model-Based Testing With a General Purpose Keyword-Driven Test Automation Framework

    Model-Based Testing (MBT) is a relatively new approach to software testing that extends test automation from test execution to test design using automatic test generation from models. The effective use of the new approach requires new skills and knowledge, such as test modeling skills, but also good tool support. This...

    Provided By Tampere University of Technology

  • White Papers // Mar 2010

    Implementation and Performance Evaluation of Multicast Control Protocol

    This paper introduced the framework of the authors' MCOP implementation in Linux environment and proposed some implementation specific features that enhance the MCOP performance. Their evaluation clarified that MCOP is working effectively and in a scalable way. MCOP is traffic controlling protocol and is able to cooperate with plenty of...

    Provided By Tampere University of Technology