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Aalborg University
(102 results)-
Whitepapers
Software Architecture Design for a Dynamic Spectrum Allocation-Enabled Cognitive Radio Testbed
February 28, 2011, 12:00am PST
The evolution of wireless communications is bringing into reality the dense deployment of femto and local area cells, which represents a challenging scenario for proving the effectiveness of...
Provided by Aalborg University
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Whitepapers
Feedback Compression Schemes for Downlink Carrier Aggregation in LTE-Advanced
September 1, 2011, 12:00am PDT
With full Channel State Information (CSI) available, it has been shown that Carrier Aggregation (CA) in the downlink can significantly improve the data rate experienced at the User Equipments...
Provided by Aalborg University
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Whitepapers
Location Assisted Handover Optimization for Heterogeneous Wireless Networks
February 17, 2011, 12:00am PST
Mobile users typically experience better connectivity if their mobile device performs handover to an available WiFi network rather than using a cellular network. For a moving user the window of...
Provided by Aalborg University
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Whitepapers
Intrinsic Information Conveying for Network Coding Systems
August 20, 2012, 12:00am PDT
This paper investigated the possibility of intrinsic information conveying in network coding systems. The information is embedded into the coding vector by constructing the vector based on a set...
Provided by Aalborg University
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Whitepapers
Asymmetrical Modulation for Uplink Communication in Cooperative Networks
April 28, 2008, 12:00am PDT
In this paper a spectrum efficient uplink communication method for cooperative wireless networks is presented. In Cellular Controlled Peer-To-Peer (CCP2P) cooperative wireless networks the mobile...
Provided by Aalborg University
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Whitepapers
One4All Cooperative Media Access Strategy in Infrastructure Based Distributed Wireless Networks
December 15, 2007, 12:00am PST
In this paper, the authors propose the one4all cooperative access strategy to introduce a more efficient media access strategy for wireless networks. The one4all scheme is designed for the...
Provided by Aalborg University
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Whitepapers
Throughput and Delay Performance Analysis of Packet Aggregation Scheme for PRMA
December 17, 2007, 12:00am PST
Packet Reservation Multiple Access (PRMA) protocol is an implicit reservation MAC protocol. It is initially designed for voice packets in the cellular networks, but it is currently also used for...
Provided by Aalborg University
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Whitepapers
Cognitive Transmissions Under a Primary ARQ Process Via Backward Interference Cancellation
September 28, 2011, 12:00am PDT
In this paper, the authors address the problem of the coexistence of Primary and Secondary Users (PU and SU, respectively) in a wireless network, where the PU employs a retransmission based error...
Provided by Aalborg University
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Whitepapers
Macro Transmission Power Reduction for HetNet Co-Channel Deployments
November 21, 2012, 12:00am PST
Enhanced Inter-Cell Interference Coordination (eICIC) techniques are targeted to improve the system and cell-edge throughput of Heterogeneous Networks (HetNets) in LTE-Advanced systems. In order...
Provided by Aalborg University
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Whitepapers
A New Metric for Vq-Based Speech Enhancement and Separation
January 24, 2011, 12:00am PST
Speech enhancement and separation algorithms frequently employ two-stage processing schemes, where the signal is first mapped to an intermediate low-dimensional parametric description. Then, these...
Provided by Aalborg University
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Whitepapers
Improving Monaural Speaker Identification by Double-Talk Detection
September 30, 2010, 12:00am PDT
This paper describes a novel approach to improve monoaural speaker identification where two speakers are present in a single-microphone recording. The goal is to identify both of the underlying...
Provided by Aalborg University
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Whitepapers
A Map Criterion for Detecting the Number of Speakers at Frame Level in Model-Based Single-Channel Speech Separation
November 17, 2010, 12:00am PST
The problem of detecting the number of speakers for a particular segment occurs in many different speech applications. In single channel speech separation, for example, this information is often...
Provided by Aalborg University
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Whitepapers
Object Classification Based Context Management for Identity Management in Internet of Things
February 1, 2013, 12:00am PST
As computing technology is becoming more tightly coupled into dynamic and mobile world of the Internet of Things (IoT), security mechanism is more stringent, flexible and less intrusive....
Provided by Aalborg University
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White Papers
Implementation of Cooperative Information Storage on Distributed Sensor Boards
February 22, 2008, 12:00am PST
Reliable data retrieval from a sensor network can require a temporal distributed data storage of the measured data among all motes. This is the case when a source of information, or a gateway, is...
Provided by Aalborg University
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White Papers
Energy Saving Potential Using Active Networking on Linux Mobile Phones
May 5, 2009, 12:00am PDT
This paper investigates the deployment of active networking on mobile devices. The objective is to determine the possibility of decreasing energy consumption on mobile devices accessing Internet...
Provided by Aalborg University
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White Papers
Implementation and Performance Analysis of Cooperative Medium Access Control Protocol for CSMA/CA Based Technologies
May 5, 2009, 12:00am PDT
In this paper, the authors investigate three different MAC protocols based on CSMA/CA in terms of throughput and channel access delay. The investigation is based on analytical models and real...
Provided by Aalborg University
-
White Papers
Energy Evaluation for Bluetooth Link Layer Packet Selection Scheme
May 5, 2009, 12:00am PDT
This paper is investigating the energy saving potential of Bluetooth. Using the Asynchronous Connectionless Link (ACL) for data transmission, Bluetooth provides different packet types, namely DM...
Provided by Aalborg University
-
White Papers
Evolutionary Theory for Cluster Head Election in Cooperative Clusters Implementing Network Coding
May 5, 2009, 12:00am PDT
In this paper a cluster head election problem is studied for a cooperative wireless network. The nodes in the cluster use random linear network coding to enhance the throughput performance in...
Provided by Aalborg University
-
White Papers
Interference Cancelation Schemes for Uplink Transmission in Femtocells
April 28, 2011, 12:00am PDT
The authors present techniques that solve the near-far problems in femtocell networks. When a co-channel configuration is used, a transmission in the macrocell may cause interference to a...
Provided by Aalborg University
-
White Papers
Wireless Secrecy With Infrastructure - Aided Cooperation
November 25, 2007, 12:00am PST
A novel approach for ensuring confidential communications over infrastructure-based wireless networks is proposed and analyzed from an information-theoretic standpoint. The considered techniques...
Provided by Aalborg University
-
White Papers
MIMO Performance Evaluation in a Street Microcell Using a Spatial Fading Emulator in Comparison With a Radio Propagation Test
September 30, 2009, 12:00am PDT
This paper presents effectiveness of a RF-controlled spatial fading emulator on MIMO performance evaluation in a street microcell environment in comparison with a radio propagation test. The...
Provided by Aalborg University
-
White Papers
Emulation of Wireless Multi-Hop Topologies With Online Mobility Simulation
June 28, 2010, 12:00am PDT
Communication in wireless networks is affected by uncontrollable disturbances in the channel. Effects of these disturbances are exacerbated in networks with dynamic topologies and multiple hops....
Provided by Aalborg University
-
White Papers
Wireless Broadband Access: Policy Implications of Heterogeneous Networks
September 15, 2010, 12:00am PDT
A wireless heterogeneous network can help increase the access transmission speed and contribute thereby to the broadband deployment policies of administrations and telecommunications operators....
Provided by Aalborg University
-
White Papers
Copenhagen as a Centre of Excellence for Mobile and Wireless Communication - The Interplay Between Supply and Demand
September 15, 2010, 12:00am PDT
The aim of this paper is to analyze the potential of the Copenhagen capital region to maintain a leading position in development and provision of mobile technologies. The paper presents empirical...
Provided by Aalborg University
-
White Papers
Competition Between Fixed and Mobile Broadband Access Based on Mobility and Data Volume
September 15, 2010, 12:00am PDT
This paper proposes a duopoly model based on a model initially introduced by Shubik and Levitan to analyze the competition based on mobility and data volume between fixed and mobile broadband...
Provided by Aalborg University
-
White Papers
LinkMind: Link Optimization in Swarming Mobile Sensor Networks
August 23, 2011, 12:00am PDT
A swarming mobile sensor network is comprised of a swarm of wirelessly connected mobile robots equipped with various sensors. Such a network can be applied in an uncertain environment for services...
Provided by Aalborg University
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White Papers
On the Impact of 2G and 3G Network Usage for Mobile Phones' Battery Life
May 5, 2009, 12:00am PDT
Over the last years mobile phones had a remarkable evolution. From a simple device for voice communication, it became a full blown multimedia device with multiple features and appealing services....
Provided by Aalborg University
-
White Papers
Implementation of Random Linear Network Coding on OpenGL-Enabled Graphics Cards
May 5, 2009, 12:00am PDT
This paper describes the implementation of network coding on OpenGL-enabled graphics cards. Network coding is an interesting approach to increase the capacity and robustness in multi-hop networks....
Provided by Aalborg University
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White Papers
PictureViewer - A Mobile Application Using Network Coding
May 5, 2009, 12:00am PDT
This paper looks into the implementation details of network coding for a mobile application running on commercial mobile phones. The mobile application coined PictureViewer can convey pictures...
Provided by Aalborg University
-
White Papers
Bio-Inspired Energy-Aware Medium Access Control Protocol for Cooperative Wireless Networks
August 5, 2008, 12:00am PDT
In this paper, bio-inspired cooperation rules are applied to wireless communication networks. The main goal is to derive cooperative behavior rules to improve the energy consumption of each mobile...
Provided by Aalborg University
-
White Papers
Overall Performance Assessment of Energy-Aware Cooperative Techniques Exploiting Multiple Description and Scalable Video Coding Schemes
February 13, 2008, 12:00am PST
In this paper, the authors develop and analyze energy-efficient cooperative techniques for multimedia applications over wireless networks. The composite cellular-short-range network architecture...
Provided by Aalborg University
-
White Papers
A Genetic Algorithm for Source Election in Cooperative Clusters Implementing Network Coding
January 23, 2010, 12:00am PST
Reference scenarios of the present research are clusters of cooperating wireless nodes, implementing random linear network coding to enhance the throughput performance of file downloading and...
Provided by Aalborg University
-
White Papers
Cooperative Spatial Reuse With Transmit Beamforming
September 4, 2007, 12:00am PDT
A cooperative scheme enabling spatial reuse, namely Cooperative Spatial Reuse (CSR), is proposed as a cooperative extension of the current TDMA-based MAC in wireless networks. In the CSR, a...
Provided by Aalborg University
-
White Papers
Implementation and Performance Evaluation of Network Coding for Cooperative Mobile Devices
January 30, 2009, 12:00am PST
In this paper a performance evaluation of network coding for cooperative wireless networks is carried out. Implementing network coding on commercially available mobile devices, the performance is...
Provided by Aalborg University
-
White Papers
The Medium Is the Message
January 1, 2011, 12:00am PST
In this paper, the authors advocate exploiting channel descriptor information in packet data communication networks to gain transmission capacity. Besides the normal data transmission also the...
Provided by Aalborg University
-
White Papers
Energy-Efficient Cooperative Techniques for Multimedia Services Over Future Wireless Networks
January 24, 2008, 12:00am PST
In this paper, the authors develop and analyze energy-efficient cooperative techniques for multimedia streaming applications in wireless networks. The concept of combined cellular-SR network...
Provided by Aalborg University
-
White Papers
Introducing Contextual Information to Mobile Phones by External and Embedded Sensors
April 1, 2008, 12:00am PDT
This paper introduces the opensensor platform. The idea is to build a wireless sensor platform that is inspired by the idea of open source. The material to build, to program and to teach the...
Provided by Aalborg University
-
White Papers
On the Beneficial Effects of Cooperative Wireless Peer to Peer Networking
May 18, 2007, 12:00am PDT
Conventional cellular systems efficiency is currently being challenged by the continuously changing and more demanding world of mobile services and communications. The major problems in...
Provided by Aalborg University
-
White Papers
Cooperative Power Saving Strategies in Wireless Networks: An Agent-Based Model
August 2, 2007, 12:00am PDT
Power consumption of mobile devices is a major subject of concern for the wireless domain. New multimedia services and advanced communication techniques such as upcoming TV-on-mobile will consume...
Provided by Aalborg University
-
White Papers
Energy and Link Measurements for Mobile Phones Using IEEE802.11b/g
February 17, 2009, 12:00am PST
In this paper, the authors investigate the energy consumption and achievable data rates of commercially available mobiles phones using WLAN IEEE802.11bg for mobile peer to peer networking. In...
Provided by Aalborg University
-
White Papers
Computing Nash Equilibrium In Wireless Ad Hoc Networks: A Simulation-Based Approach
February 21, 2012, 12:00am PST
This paper studies the problem of computing Nash equilibrium in wireless networks modeled by Weighted Timed Automata. Such formalism comes together with a logic that can be used to describe...
Provided by Aalborg University
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White Papers
Multi-User MIMO and Carrier Aggregation in 4G Systems: The SAMURAI Approach
February 3, 2012, 12:00am PST
The market success of broadband multimedia-enabled devices such as smart phones, tablets, and laptops is increasing the demand for wireless data capacity in mobile cellular systems. In order to...
Provided by Aalborg University
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White Papers
On Modal Refinement and Consistency
July 1, 2008, 12:00am PDT
Almost 20 years after the original conception, the authors revisit several fundamental questions about modal transition systems. First, they demonstrate the incompleteness of the standard modal...
Provided by Aalborg University
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White Papers
User Scenarios 2020 - A Worldwide Wireless Future
July 1, 2009, 12:00am PDT
For years, telecommunications and IT have represented highly profitable business areas with continuous developments of technologies, devices and services to serve all types of users. During the...
Provided by Aalborg University
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White Papers
Receiver-Side Opportunism in Cognitive Networks
April 9, 2011, 12:00am PDT
Cognitive radios may increase spectral efficiency by filling in spectral gaps, transmitting under the interference temperature, or by exploiting transmitter-side information - all methods which...
Provided by Aalborg University
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White Papers
Cognitive Radio Network Architecture: Part I - General Structure
March 11, 2008, 12:00am PDT
Cognitive radio has been considered as a key technology for future wireless communications and mobile computing. The authors note the cognitive radios can form Cognitive Radio Networks (CRN) by...
Provided by Aalborg University
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White Papers
Cognitive Radio Network Architecture: Part II - Trusted Network Layer Structure
March 11, 2008, 12:00am PDT
Cognitive radios shall form Cognitive Radio Network (CRN) to complete the packets delivery. As cognitive radio network is a general multi-hop wireless heterogeneous network, trust becomes a...
Provided by Aalborg University
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White Papers
Network Coding for Data Dissemination: It Is Not What You Know, But What Your Neighbors Know
May 1, 2009, 12:00am PDT
The authors propose a linear network coding scheme to disseminate a finite number of data packets in arbitrary networks. The setup assumes a packet erasure channel, slotted time, and that nodes...
Provided by Aalborg University
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White Papers
A Mobile Platform for Measurements in Dynamic Topology Wireless Networks
July 14, 2009, 12:00am PDT
Due to the wide spread of mobile devices, such as smartphones, nowadays new applications and appealing services are emerging for wireless networks. Some interesting novel architectures for...
Provided by Aalborg University
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White Papers
Wireless Peer-to-Peer Cooperation: When Is It Worth Adopting This Paradigm?
March 29, 2008, 12:00am PDT
Cooperation over short-range wireless links among devices downloading remote contents through cellular links is a paradigm quickly gaining ground in the view of answering some of the main issues...
Provided by Aalborg University
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White Papers
Network Coding Opportunities for Wireless Grids Formed by Mobile Devices
September 15, 2008, 12:00am PDT
Wireless grids have potential in sharing communication, computational and storage resources making these networks more powerful, more robust, and less cost intensive. However, to enjoy the...
Provided by Aalborg University
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White Papers
Localization Information Retrieval Exploiting Cooperation Among Mobile Devices
February 21, 2008, 12:00am PST
Localization information retrieval is breaking new ground for mobile applications for indoor or urban areas. GPS is the positioning technology that powers the majority of the navigation devices...
Provided by Aalborg University
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White Papers
Cooperative Wireless Networking Using Software Defined Radio
January 1, 2011, 12:00am PST
This paper describes a novel architecture in wireless communication referred to as micro cooperative communication and advocates the need of software defined radio to support this kind of...
Provided by Aalborg University
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White Papers
Cooperative Web Browsing for Mobile Phones
June 21, 2008, 12:00am PDT
This paper advocates a novel approach for web browsing on mobile phones based on cooperation among mobile phones within close proximity. In the actual state of the art, mobile phones can access...
Provided by Aalborg University
-
White Papers
Energy and Link Measurements for Mobile Phones Using IEEE802.11b/g
February 17, 2009, 12:00am PST
In this paper, the authors investigate the energy consumption and achievable data rates of commercially available mobiles phones using WLAN IEEE802.11bg for mobile peer to peer networking. In...
Provided by Aalborg University
-
White Papers
Cooperative Power Saving Strategies in Wireless Networks: An Agent-Based Model
August 2, 2007, 12:00am PDT
Power consumption of mobile devices is a major subject of concern for the wireless domain. New multimedia services and advanced communication techniques such as upcoming TV-on-mobile will consume...
Provided by Aalborg University
-
White Papers
On the Beneficial Effects of Cooperative Wireless Peer to Peer Networking
May 18, 2007, 12:00am PDT
Conventional cellular systems efficiency is currently being challenged by the continuously changing and more demanding world of mobile services and communications. The major problems in...
Provided by Aalborg University
-
White Papers
Introducing Contextual Information to Mobile Phones by External and Embedded Sensors
April 1, 2008, 12:00am PDT
This paper introduces the opensensor platform. The idea is to build a wireless sensor platform that is inspired by the idea of open source. The material to build, to program and to teach the...
Provided by Aalborg University
-
White Papers
Energy-Efficient Cooperative Techniques for Multimedia Services Over Future Wireless Networks
January 24, 2008, 12:00am PST
In this paper, the authors develop and analyze energy-efficient cooperative techniques for multimedia streaming applications in wireless networks. The concept of combined cellular-SR network...
Provided by Aalborg University
-
White Papers
The Medium Is the Message
January 1, 2011, 12:00am PST
In this paper, the authors advocate exploiting channel descriptor information in packet data communication networks to gain transmission capacity. Besides the normal data transmission also the...
Provided by Aalborg University
-
White Papers
Implementation and Performance Evaluation of Network Coding for Cooperative Mobile Devices
January 30, 2009, 12:00am PST
In this paper a performance evaluation of network coding for cooperative wireless networks is carried out. Implementing network coding on commercially available mobile devices, the performance is...
Provided by Aalborg University
-
White Papers
Cooperative Spatial Reuse With Transmit Beamforming
September 4, 2007, 12:00am PDT
A cooperative scheme enabling spatial reuse, namely Cooperative Spatial Reuse (CSR), is proposed as a cooperative extension of the current TDMA-based MAC in wireless networks. In the CSR, a...
Provided by Aalborg University
-
White Papers
A Genetic Algorithm for Source Election in Cooperative Clusters Implementing Network Coding
January 23, 2010, 12:00am PST
Reference scenarios of the present research are clusters of cooperating wireless nodes, implementing random linear network coding to enhance the throughput performance of file downloading and...
Provided by Aalborg University
-
White Papers
Overall Performance Assessment of Energy-Aware Cooperative Techniques Exploiting Multiple Description and Scalable Video Coding Schemes
February 13, 2008, 12:00am PST
In this paper, the authors develop and analyze energy-efficient cooperative techniques for multimedia applications over wireless networks. The composite cellular-short-range network architecture...
Provided by Aalborg University
-
White Papers
Bio-Inspired Energy-Aware Medium Access Control Protocol for Cooperative Wireless Networks
August 5, 2008, 12:00am PDT
In this paper, bio-inspired cooperation rules are applied to wireless communication networks. The main goal is to derive cooperative behavior rules to improve the energy consumption of each mobile...
Provided by Aalborg University
-
White Papers
PictureViewer - A Mobile Application Using Network Coding
May 5, 2009, 12:00am PDT
This paper looks into the implementation details of network coding for a mobile application running on commercial mobile phones. The mobile application coined PictureViewer can convey pictures...
Provided by Aalborg University
-
White Papers
Implementation of Random Linear Network Coding on OpenGL-Enabled Graphics Cards
May 5, 2009, 12:00am PDT
This paper describes the implementation of network coding on OpenGL-enabled graphics cards. Network coding is an interesting approach to increase the capacity and robustness in multi-hop networks....
Provided by Aalborg University
-
White Papers
On the Impact of 2G and 3G Network Usage for Mobile Phones' Battery Life
May 5, 2009, 12:00am PDT
Over the last years mobile phones had a remarkable evolution. From a simple device for voice communication, it became a full blown multimedia device with multiple features and appealing services....
Provided by Aalborg University
-
White Papers
LinkMind: Link Optimization in Swarming Mobile Sensor Networks
August 23, 2011, 12:00am PDT
A swarming mobile sensor network is comprised of a swarm of wirelessly connected mobile robots equipped with various sensors. Such a network can be applied in an uncertain environment for services...
Provided by Aalborg University
-
White Papers
Competition Between Fixed and Mobile Broadband Access Based on Mobility and Data Volume
September 15, 2010, 12:00am PDT
This paper proposes a duopoly model based on a model initially introduced by Shubik and Levitan to analyze the competition based on mobility and data volume between fixed and mobile broadband...
Provided by Aalborg University
-
White Papers
Copenhagen as a Centre of Excellence for Mobile and Wireless Communication - The Interplay Between Supply and Demand
September 15, 2010, 12:00am PDT
The aim of this paper is to analyze the potential of the Copenhagen capital region to maintain a leading position in development and provision of mobile technologies. The paper presents empirical...
Provided by Aalborg University
-
White Papers
Wireless Broadband Access: Policy Implications of Heterogeneous Networks
September 15, 2010, 12:00am PDT
A wireless heterogeneous network can help increase the access transmission speed and contribute thereby to the broadband deployment policies of administrations and telecommunications operators....
Provided by Aalborg University
-
White Papers
Emulation of Wireless Multi-Hop Topologies With Online Mobility Simulation
June 28, 2010, 12:00am PDT
Communication in wireless networks is affected by uncontrollable disturbances in the channel. Effects of these disturbances are exacerbated in networks with dynamic topologies and multiple hops....
Provided by Aalborg University
-
White Papers
MIMO Performance Evaluation in a Street Microcell Using a Spatial Fading Emulator in Comparison With a Radio Propagation Test
September 30, 2009, 12:00am PDT
This paper presents effectiveness of a RF-controlled spatial fading emulator on MIMO performance evaluation in a street microcell environment in comparison with a radio propagation test. The...
Provided by Aalborg University
-
White Papers
Wireless Secrecy With Infrastructure - Aided Cooperation
November 25, 2007, 12:00am PST
A novel approach for ensuring confidential communications over infrastructure-based wireless networks is proposed and analyzed from an information-theoretic standpoint. The considered techniques...
Provided by Aalborg University
-
White Papers
Interference Cancelation Schemes for Uplink Transmission in Femtocells
April 28, 2011, 12:00am PDT
The authors present techniques that solve the near-far problems in femtocell networks. When a co-channel configuration is used, a transmission in the macrocell may cause interference to a...
Provided by Aalborg University
-
White Papers
Evolutionary Theory for Cluster Head Election in Cooperative Clusters Implementing Network Coding
May 5, 2009, 12:00am PDT
In this paper a cluster head election problem is studied for a cooperative wireless network. The nodes in the cluster use random linear network coding to enhance the throughput performance in...
Provided by Aalborg University
-
White Papers
Energy Evaluation for Bluetooth Link Layer Packet Selection Scheme
May 5, 2009, 12:00am PDT
This paper is investigating the energy saving potential of Bluetooth. Using the Asynchronous Connectionless Link (ACL) for data transmission, Bluetooth provides different packet types, namely DM...
Provided by Aalborg University
-
White Papers
Implementation and Performance Analysis of Cooperative Medium Access Control Protocol for CSMA/CA Based Technologies
May 5, 2009, 12:00am PDT
In this paper, the authors investigate three different MAC protocols based on CSMA/CA in terms of throughput and channel access delay. The investigation is based on analytical models and real...
Provided by Aalborg University
-
White Papers
Energy Saving Potential Using Active Networking on Linux Mobile Phones
May 5, 2009, 12:00am PDT
This paper investigates the deployment of active networking on mobile devices. The objective is to determine the possibility of decreasing energy consumption on mobile devices accessing Internet...
Provided by Aalborg University
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