Orange Labs

Displaying 1-28 of 28 results

  • White Papers // Mar 2014

    Catalog Dynamics: Impact of Content Publishing and Perishing on the Performance of a LRU Cache

    The Internet heavily relies on content distribution networks and transparent caches to cope with the ever-increasing traffic demand of users. Content, however, is essentially versatile: once published at a given time, its popularity vanishes over time. All requests for a given document are then concentrated between the publishing time and...

    Provided By Orange Labs

  • White Papers // Apr 2013

    Quality of Service in Wireless Cellular Networks Subject to Log-Normal Shadowing

    Shadowing is believed to degrade the Quality of Service (QoS) in wireless cellular networks. Assuming log-normal shadowing, and studying mobile's path-loss with respect to the serving Base Station (BS) and the corresponding interference factor (the ratio of the sum of the path-gains from interfering BS's to the path-gain from the...

    Provided By Orange Labs

  • White Papers // Jan 2013

    Mean Field Energy Games in Wireless Networks

    In this paper, the authors tackle the problem of energy-efficient distributed power control in wireless networks with a large number of transmitters. The problem is modeled by a dynamic game. Each transmitter-receiver communication is characterized by a state given by the available energy and/or the individual channel state and whose...

    Provided By Orange Labs

  • White Papers // Nov 2012

    Improved (and Practical) Public-Key Authentication for UHF RFID Tags

    CRYPTOGPS has been promoted as a public-key technology suitable for UHF RFID tag authentication. Since it is a classical Commitment-Challenge Response (CCR) scheme, it can be converted into a signature scheme using the transformation proposed by the researchers. Previously this signature variant has not been considered for RFID, but in...

    Provided By Orange Labs

  • White Papers // Aug 2012

    Realistic Storage of Pending Requests in Content-Centric Network Routers

    Content-Centric Networking (CCN) is a novel network paradigm, which aims at moving from the traditional host-to-host network model to a client-to-content one. This shift brings many benefits but also leads a big challenge on the hardware technologies for implementing CCN nodes. For example the Pending Interest Table, one critical component...

    Provided By Orange Labs

  • White Papers // May 2012

    LTE4V2X - Collection, Dissemination and Multi-Hop Forwarding

    In a recent work, the authors proposed LTE4V2X, a novel framework for a centralized vehicular network organization based on 4G LTE network. They demonstrated the efficiency of their framework for an FCD (Floating Car Data) application. Such applications are based on data collected from vehicles (localization, speed, direction, etc.) in...

    Provided By Orange Labs

  • White Papers // May 2012

    Receive Antenna Shift Keying

    Wireless communication systems based on Time Reversal (TR) and a Single Tap Receiver (STR) are optimum at low Signal-to-Noise Ratio (SNR), while keeping low complexity at the receiver. Thus, they are interesting for low order Phase and Amplitude Modulations, such as Binary Phase Shift Keying (BPSK) or Quadrature Phase Shift...

    Provided By Orange Labs

  • White Papers // May 2012

    The Low-Overhead Routing Policy in the Content Centric Network

    Some efforts have been taken to generalize the Internet architecture by treating content as a primitive instead of focusing on endpoint addresses of hosts because today's network is increasingly dominated by content distribution. One of the representative works in such aspect is known as Content-Centric Networking (CCN), which reuses the...

    Provided By Orange Labs

  • White Papers // May 2012

    Dimensioning X2 Backhaul Link in LTE Networks

    LTE networks are widely considered as one solution for future high-capacity mobile communications. A higher bit rate, a wider cell coverage, a lower latency, an enhanced and seamless mobility management are some of new features of LTE networks. In LTE architecture, the space is partitioned into cells, each cell being...

    Provided By Orange Labs

  • White Papers // May 2012

    Point-to-Multipoint Communication in Power Line Networks: A Novel FDM Access Method

    In Power Line Networks, a link adaptation is realized by combining Multi-Carrier modulations techniques and bit-loading algorithms, resulting in the creation of tone maps. A tone map defines, for each subcarrier on a particular transmission path, the appropriate constellation that has to be applied based on a link quality criterion....

    Provided By Orange Labs

  • White Papers // Apr 2012

    Four Months in DailyMotion: Dissecting User Video Requests

    The growth of User-Generated Content (UGC) traffic makes the understanding of its nature a priority for network operators, content providers and equipment suppliers. In this paper, the authors study a four-month dataset that logs all video requests to Daily-Motion made by a fixed subset of users. They were able to...

    Provided By Orange Labs

  • White Papers // Mar 2012

    Joint Clustering and Interference Alignment for Overloaded Femtocell Networks

    In this paper, the authors propose three joint clustering and scheduling schemes for overloaded femtocell network based on interference alignment. The schemes try to reach a tradeoff between the system sum-capacity and the fairness between the users. Considering different path loss configurations, the performance of the different schemes in terms...

    Provided By Orange Labs

  • White Papers // Mar 2012

    Enhanced Beamforming Over Multiple Iterations for Downlink Broadcast Channels

    In this paper, the authors investigate efficient beam-forming schemes for downlink broadcast channels of MIMO systems. Optimal solution to this problem is known to be infeasible due to the prohibitive complexity and recent research focuses on suboptimal approaches with reduced complexity. They first present a progressive beam-forming method that maximizes...

    Provided By Orange Labs

  • White Papers // Jan 2012

    ICP: Design and Evaluation of an Interest Control Protocol for Content-Centric Networking

    Content-Centric Networking (CCN) brings a paradigm shift in the present Internet communication model by addressing named-data instead of host locations. With respect to TCP/IP, the transport model is connectionless with a unique endpoint at the receiver, driving a retrieval process natively point to multi-point. Another salient feature of CCN is...

    Provided By Orange Labs

  • White Papers // Dec 2011

    Flow-Aware Traffic Control for a Content-Centric Network

    The Content-Centric Networking (CCN) paradigm proposed by PARC holds considerable promise as the architecture for the future Internet but remains incomplete. In this paper, the authors argue that it is necessary to supplement CCN with mechanisms enabling controlled sharing of network bandwidth by concurrent flows. Traffic control is necessary to...

    Provided By Orange Labs

  • White Papers // Sep 2011

    Semantic Technologies and e-Business

    In this paper, the authors study what semantic technologies can bring to the e-business domain and how they can be applied to it. After an overview of the goals to be achieved by e-business applications they detail a large panel of existing e-business standards, with a specific focus on B2B...

    Provided By Orange Labs

  • White Papers // Sep 2011

    On the Dimensioning of Cellular OFDMA Networks

    In this paper, the authors address the issue of cellular OFDMA networks dimensioning. Network design consists of evaluating cell coverage and capacity and may involve many parameters related to environment, system configuration, and Quality of Service (QoS) requirements. In order to quickly study the impact of each of these parameters,...

    Provided By Orange Labs

  • White Papers // Aug 2011

    On the Recovery Performance of Single-And Multipath OLSR in Wireless Multi-Hop Networks

    In this paper, the authors study and improve the recovery properties of single and multipath routing strategies when facing network failure situations. In particular, they focus their study on two MANET routing protocols: OLSR and its multipath extension MPOLSR. In various wireless multi-hop network environments, especially in multiple chain topologies,...

    Provided By Orange Labs

  • White Papers // Aug 2011

    Competitive Assessments for HAP Delivery of Mobile Services in Emerging Countries

    In recent years, network deployment based on High Altitude Platforms (HAPs) has gained momentum through several initiatives where air vehicles and telecommunications payloads have been adapted and refined, resulting in more efficient and less expensive platforms. In this paper, the authors study HAP as an alternative or complementary fast-evolving technology...

    Provided By Orange Labs

  • White Papers // Aug 2011

    HEP: Context-Aware Communication System

    Users may sometimes be overloaded with work so that they become temporally unable to handle incoming communications. Context aware systems are a promising approach to facilitate daily-life activities, especially providing assistance for communication management. After having surveyed the different challenges to build context-aware systems (e.g., modeling, reasoning about context), the...

    Provided By Orange Labs

  • White Papers // Jul 2011

    Design of Layered Radio Environment Maps for RAN Optimization in Heterogeneous LTE Systems

    In this contribution layered Radio Environment Map (REM) architecture is designed and applied in the framework of radio-access network optimization for heterogeneous LTE systems that comprise both macrocells and femtocells. The authors define layer as the hierarchical representation of a geographical area. In each layer, different instances of the same...

    Provided By Orange Labs

  • White Papers // Jul 2011

    dVirt: A Virtualized Infrastructure for Experimenting BGP Routing

    In this paper, the authors propose dVirt, a distributed virtualized infrastructure enabling network operators to better grasp the routing mechanisms and anticipate network behavior. dVirt offers an emulated layer 2 connectivity that allows accurate simulation of IP routing and protocol dynamics. Using virtualization and Quagga routing software, they achieve scalable...

    Provided By Orange Labs

  • White Papers // May 2010

    Virtual MIMO Network A Physical Wireless Analysis

    By analogy with an approach widely used in physics, the authors consider a discrete set of Base Stations (BSs) as a continuum of transmitters. This model allows them to establish a simple closed-form formula of the interferences and the SINR received by a mobile, whatever its location. As an application...

    Provided By Orange Labs

  • White Papers // Sep 2009

    Cryptanalysis of the Square Cryptosystems

    Following the cryptanalysis of the encryption scheme HFE and of the signature scheme SFLASH, no serious alternative multivariate cryptosystems remained, except maybe the signature schemes UOV and HFE. Recently, two proposals have been made to build highly efficient multivariate cryptosystems around a quadratic internal transformation: the first one is a...

    Provided By Orange Labs

  • White Papers // May 2009

    The Impact of Association on the Capacity of WLANs

    This paper contributes to the definition of an association policy for a multi-channel, multiple AP WLAN that depends on both physical rate and realized throughput. The authors show that existing proposals are inefficient when several APs share the same channel and define a new policy that is demonstrated to be...

    Provided By Orange Labs

  • White Papers // Jan 2009

    Is the "Law of the Jungle" Sustainable for the Internet?

    In this paper, the authors seek to characterize the behavior of the Internet in the absence of congestion control. More specifically, they assume all sources transmit at their maximum rate and recover from packet loss by the use of some ideal erasure coding scheme. They estimate the efficiency of resource...

    Provided By Orange Labs

  • White Papers // Sep 2008

    Slide Attacks on a Class of Hash Functions

    In this paper, the authors study the application of slide attacks to hash functions. Slide attacks have mostly been used for block cipher cryptanalysis. But, as shown in the current paper, they also form a potential threat for hash functions, namely for sponge-function like structures. As it turns out, certain...

    Provided By Orange Labs

  • White Papers // Sep 2007

    Identity-Based Broadcast Encryption with Constant Size Ciphertexts and Private Keys

    The concept of Broadcast Encryption (BE) was introduced by the researchers. In BE schemes, a broadcaster encrypts messages and transmits them to a group of users who are listening to a broadcast channel and use their private keys to decrypt transmissions. This paper describes the first Identity-Based Broadcast Encryption scheme...

    Provided By Orange Labs

  • White Papers // May 2010

    Virtual MIMO Network A Physical Wireless Analysis

    By analogy with an approach widely used in physics, the authors consider a discrete set of Base Stations (BSs) as a continuum of transmitters. This model allows them to establish a simple closed-form formula of the interferences and the SINR received by a mobile, whatever its location. As an application...

    Provided By Orange Labs

  • White Papers // Jul 2011

    dVirt: A Virtualized Infrastructure for Experimenting BGP Routing

    In this paper, the authors propose dVirt, a distributed virtualized infrastructure enabling network operators to better grasp the routing mechanisms and anticipate network behavior. dVirt offers an emulated layer 2 connectivity that allows accurate simulation of IP routing and protocol dynamics. Using virtualization and Quagga routing software, they achieve scalable...

    Provided By Orange Labs

  • White Papers // Jul 2011

    Design of Layered Radio Environment Maps for RAN Optimization in Heterogeneous LTE Systems

    In this contribution layered Radio Environment Map (REM) architecture is designed and applied in the framework of radio-access network optimization for heterogeneous LTE systems that comprise both macrocells and femtocells. The authors define layer as the hierarchical representation of a geographical area. In each layer, different instances of the same...

    Provided By Orange Labs

  • White Papers // Aug 2011

    HEP: Context-Aware Communication System

    Users may sometimes be overloaded with work so that they become temporally unable to handle incoming communications. Context aware systems are a promising approach to facilitate daily-life activities, especially providing assistance for communication management. After having surveyed the different challenges to build context-aware systems (e.g., modeling, reasoning about context), the...

    Provided By Orange Labs

  • White Papers // Dec 2011

    Flow-Aware Traffic Control for a Content-Centric Network

    The Content-Centric Networking (CCN) paradigm proposed by PARC holds considerable promise as the architecture for the future Internet but remains incomplete. In this paper, the authors argue that it is necessary to supplement CCN with mechanisms enabling controlled sharing of network bandwidth by concurrent flows. Traffic control is necessary to...

    Provided By Orange Labs

  • White Papers // Jan 2009

    Is the "Law of the Jungle" Sustainable for the Internet?

    In this paper, the authors seek to characterize the behavior of the Internet in the absence of congestion control. More specifically, they assume all sources transmit at their maximum rate and recover from packet loss by the use of some ideal erasure coding scheme. They estimate the efficiency of resource...

    Provided By Orange Labs

  • White Papers // May 2009

    The Impact of Association on the Capacity of WLANs

    This paper contributes to the definition of an association policy for a multi-channel, multiple AP WLAN that depends on both physical rate and realized throughput. The authors show that existing proposals are inefficient when several APs share the same channel and define a new policy that is demonstrated to be...

    Provided By Orange Labs

  • White Papers // Sep 2011

    On the Dimensioning of Cellular OFDMA Networks

    In this paper, the authors address the issue of cellular OFDMA networks dimensioning. Network design consists of evaluating cell coverage and capacity and may involve many parameters related to environment, system configuration, and Quality of Service (QoS) requirements. In order to quickly study the impact of each of these parameters,...

    Provided By Orange Labs

  • White Papers // Aug 2011

    On the Recovery Performance of Single-And Multipath OLSR in Wireless Multi-Hop Networks

    In this paper, the authors study and improve the recovery properties of single and multipath routing strategies when facing network failure situations. In particular, they focus their study on two MANET routing protocols: OLSR and its multipath extension MPOLSR. In various wireless multi-hop network environments, especially in multiple chain topologies,...

    Provided By Orange Labs

  • White Papers // Apr 2012

    Four Months in DailyMotion: Dissecting User Video Requests

    The growth of User-Generated Content (UGC) traffic makes the understanding of its nature a priority for network operators, content providers and equipment suppliers. In this paper, the authors study a four-month dataset that logs all video requests to Daily-Motion made by a fixed subset of users. They were able to...

    Provided By Orange Labs

  • White Papers // Aug 2011

    Competitive Assessments for HAP Delivery of Mobile Services in Emerging Countries

    In recent years, network deployment based on High Altitude Platforms (HAPs) has gained momentum through several initiatives where air vehicles and telecommunications payloads have been adapted and refined, resulting in more efficient and less expensive platforms. In this paper, the authors study HAP as an alternative or complementary fast-evolving technology...

    Provided By Orange Labs

  • White Papers // Aug 2012

    Realistic Storage of Pending Requests in Content-Centric Network Routers

    Content-Centric Networking (CCN) is a novel network paradigm, which aims at moving from the traditional host-to-host network model to a client-to-content one. This shift brings many benefits but also leads a big challenge on the hardware technologies for implementing CCN nodes. For example the Pending Interest Table, one critical component...

    Provided By Orange Labs

  • White Papers // May 2012

    LTE4V2X - Collection, Dissemination and Multi-Hop Forwarding

    In a recent work, the authors proposed LTE4V2X, a novel framework for a centralized vehicular network organization based on 4G LTE network. They demonstrated the efficiency of their framework for an FCD (Floating Car Data) application. Such applications are based on data collected from vehicles (localization, speed, direction, etc.) in...

    Provided By Orange Labs

  • White Papers // May 2012

    Receive Antenna Shift Keying

    Wireless communication systems based on Time Reversal (TR) and a Single Tap Receiver (STR) are optimum at low Signal-to-Noise Ratio (SNR), while keeping low complexity at the receiver. Thus, they are interesting for low order Phase and Amplitude Modulations, such as Binary Phase Shift Keying (BPSK) or Quadrature Phase Shift...

    Provided By Orange Labs

  • White Papers // May 2012

    The Low-Overhead Routing Policy in the Content Centric Network

    Some efforts have been taken to generalize the Internet architecture by treating content as a primitive instead of focusing on endpoint addresses of hosts because today's network is increasingly dominated by content distribution. One of the representative works in such aspect is known as Content-Centric Networking (CCN), which reuses the...

    Provided By Orange Labs

  • White Papers // May 2012

    Dimensioning X2 Backhaul Link in LTE Networks

    LTE networks are widely considered as one solution for future high-capacity mobile communications. A higher bit rate, a wider cell coverage, a lower latency, an enhanced and seamless mobility management are some of new features of LTE networks. In LTE architecture, the space is partitioned into cells, each cell being...

    Provided By Orange Labs

  • White Papers // May 2012

    Point-to-Multipoint Communication in Power Line Networks: A Novel FDM Access Method

    In Power Line Networks, a link adaptation is realized by combining Multi-Carrier modulations techniques and bit-loading algorithms, resulting in the creation of tone maps. A tone map defines, for each subcarrier on a particular transmission path, the appropriate constellation that has to be applied based on a link quality criterion....

    Provided By Orange Labs

  • White Papers // Mar 2012

    Joint Clustering and Interference Alignment for Overloaded Femtocell Networks

    In this paper, the authors propose three joint clustering and scheduling schemes for overloaded femtocell network based on interference alignment. The schemes try to reach a tradeoff between the system sum-capacity and the fairness between the users. Considering different path loss configurations, the performance of the different schemes in terms...

    Provided By Orange Labs

  • White Papers // Mar 2012

    Enhanced Beamforming Over Multiple Iterations for Downlink Broadcast Channels

    In this paper, the authors investigate efficient beam-forming schemes for downlink broadcast channels of MIMO systems. Optimal solution to this problem is known to be infeasible due to the prohibitive complexity and recent research focuses on suboptimal approaches with reduced complexity. They first present a progressive beam-forming method that maximizes...

    Provided By Orange Labs

  • White Papers // Apr 2013

    Quality of Service in Wireless Cellular Networks Subject to Log-Normal Shadowing

    Shadowing is believed to degrade the Quality of Service (QoS) in wireless cellular networks. Assuming log-normal shadowing, and studying mobile's path-loss with respect to the serving Base Station (BS) and the corresponding interference factor (the ratio of the sum of the path-gains from interfering BS's to the path-gain from the...

    Provided By Orange Labs

  • White Papers // Jan 2013

    Mean Field Energy Games in Wireless Networks

    In this paper, the authors tackle the problem of energy-efficient distributed power control in wireless networks with a large number of transmitters. The problem is modeled by a dynamic game. Each transmitter-receiver communication is characterized by a state given by the available energy and/or the individual channel state and whose...

    Provided By Orange Labs

  • White Papers // Jan 2012

    ICP: Design and Evaluation of an Interest Control Protocol for Content-Centric Networking

    Content-Centric Networking (CCN) brings a paradigm shift in the present Internet communication model by addressing named-data instead of host locations. With respect to TCP/IP, the transport model is connectionless with a unique endpoint at the receiver, driving a retrieval process natively point to multi-point. Another salient feature of CCN is...

    Provided By Orange Labs

  • White Papers // Sep 2011

    Semantic Technologies and e-Business

    In this paper, the authors study what semantic technologies can bring to the e-business domain and how they can be applied to it. After an overview of the goals to be achieved by e-business applications they detail a large panel of existing e-business standards, with a specific focus on B2B...

    Provided By Orange Labs

  • White Papers // Sep 2009

    Cryptanalysis of the Square Cryptosystems

    Following the cryptanalysis of the encryption scheme HFE and of the signature scheme SFLASH, no serious alternative multivariate cryptosystems remained, except maybe the signature schemes UOV and HFE. Recently, two proposals have been made to build highly efficient multivariate cryptosystems around a quadratic internal transformation: the first one is a...

    Provided By Orange Labs

  • White Papers // Sep 2007

    Identity-Based Broadcast Encryption with Constant Size Ciphertexts and Private Keys

    The concept of Broadcast Encryption (BE) was introduced by the researchers. In BE schemes, a broadcaster encrypts messages and transmits them to a group of users who are listening to a broadcast channel and use their private keys to decrypt transmissions. This paper describes the first Identity-Based Broadcast Encryption scheme...

    Provided By Orange Labs

  • White Papers // Sep 2008

    Slide Attacks on a Class of Hash Functions

    In this paper, the authors study the application of slide attacks to hash functions. Slide attacks have mostly been used for block cipher cryptanalysis. But, as shown in the current paper, they also form a potential threat for hash functions, namely for sponge-function like structures. As it turns out, certain...

    Provided By Orange Labs

  • White Papers // Nov 2012

    Improved (and Practical) Public-Key Authentication for UHF RFID Tags

    CRYPTOGPS has been promoted as a public-key technology suitable for UHF RFID tag authentication. Since it is a classical Commitment-Challenge Response (CCR) scheme, it can be converted into a signature scheme using the transformation proposed by the researchers. Previously this signature variant has not been considered for RFID, but in...

    Provided By Orange Labs

  • White Papers // Mar 2014

    Catalog Dynamics: Impact of Content Publishing and Perishing on the Performance of a LRU Cache

    The Internet heavily relies on content distribution networks and transparent caches to cope with the ever-increasing traffic demand of users. Content, however, is essentially versatile: once published at a given time, its popularity vanishes over time. All requests for a given document are then concentrated between the publishing time and...

    Provided By Orange Labs