The Experts below are selected from a list of 678 Experts worldwide ranked by ideXlab platform

Maria Calderon - One of the best experts on this subject based on the ideXlab platform.

  • IPv6 Address Autoconfiguration in geonetworking-enabled VANETs: characterization and evaluation of the ETSI solution
    EURASIP Journal on Wireless Communications and Networking, 2012
    Co-Authors: Marco Gramaglia, Ignacio Soto, Maria Calderon, Carlos J Bernardos, Roberto Baldessari
    Abstract:

    In this article we make a thorough characterization and evaluation of the solution standardized by the European Telecommunications Standards Institute for IPv6 transmission of packets over geographical location aware vehicular networks. In particular, we focus on IPv6 Address auto-configuration, one of the required pieces to enable Internet connectivity from vehicles. Communications in vehicular networks are strongly dependent on the availability of multi-hop connectivity to the fixed infrastructure, so also we analyze the probability of achieving this connectivity under different circumstances, and we use the results to identify interesting target scenarios for Address auto-configuration mechanisms. Keeping those scenarios in mind, we perform a characterization and deep evaluation--analytically and by means of simulations--of the standardized IPv6 Address au-toconfiguration solution; proposing some configuration guidelines and highlighting the scenarios where complementary enhancements might be needed.

  • trebol tree based routing and Address Autoconfiguration for vehicle to internet communications
    Vehicular Technology Conference, 2011
    Co-Authors: Marco Gramaglia, Maria Calderon, Carlos J Bernardos
    Abstract:

    Efficient vehicle-to-Internet routing and Address Autoconfiguration are two of the missing pieces required to provide Internet connectivity from vehicles. Here, we propose TREBOL, a tree-based and configurable protocol which benefits from the inherent tree-shaped nature of vehicle to Internet traffic to reduce the signaling overhead while dealing efficiently with the vehicular dynamics. The paper describes the design and rationale of the solution, and presents the results of an experimental validation and performance evaluation, based on extensive simulations and real vehicular traces obtained in the region of Madrid.

  • Performance evaluation of a tree-based routing and Address Autoconfiguration for vehicle-to-Internet communications
    2011 11th International Conference on ITS Telecommunications, 2011
    Co-Authors: Marco Gramaglia, Carlos Jesus Bernardos, Maria Calderon, Antonio De La Oliva
    Abstract:

    Vehicular ad hoc networks have proven to be quite useful for broadcast alike communications between nearby cars, but can also be used to provide Internet connectivity from vehicles. In order to do so, vehicle-to-Internet routing and IP Address Autoconfiguration are two critical pieces. TREBOL is a tree-based and configurable protocol which benefits from the inherent tree-shaped nature of vehicle to Internet traffic to reduce the signaling overhead while dealing efficiently with the vehicular dynamics. This paper experimentally evaluates the performance of TREBOL using a Linux implementation under lab-controlled realistic scenarios, including real vehicular traces obtained in the region of Madrid.

  • Overhearing-assisted optimization of Address Autoconfiguration in position-aware VANETs
    IEEE Transactions on Vehicular Technology, 2011
    Co-Authors: Marco Gramaglia, Carlos Jesus Bernardos, Ignacio Soto, Maria Calderon
    Abstract:

    Vehicular networks allow vehicles to exchange information that can be used to improve traffic efficiency and drivers' safety. In addition to these new applications, Internet connectivity is also expected to be available in the cars of the near future, speeding up the global adoption of vehicular communication systems. One of the requirements for connecting vehicles to the Internet is their ability to autoconfigure Internet Protocol (IP) Addresses. In this paper, we propose an optimization to Geographically Scoped stateless Address Configuration (GeoSAC), which is an IP Address Autoconfiguration mechanism for geographically aware location vehicles. The benefits of this optimization are twofold: 1) It can reduce the IP Address configuration time, and 2) it can be used to reduce the signaling overhead of GeoSAC. The optimization requires no changes to the GeoSAC operation, being fully compatible with the original solution. We derive an analytical model for the probability of our optimization being effective in realistic scenarios and for the IP Address configuration time. We also provide a thorough evaluation of the performance improvements of the optimization, including simulations with a realistic model for wireless technology, real vehicular traces, and experiments with a real prototype, which provide strong support for our analytical model.

  • Overhearing-assisted optimization of Address Autoconfiguration in position-aware VANETs
    2011
    Co-Authors: Marco Gramaglia, Ignacio Soto, Carlos J Bernardos, Maria Calderon
    Abstract:

    Abstract—Vehicular networks allow vehicles to exchange infor-mation that can be used to improve traffic efficiency and drivers’ safety. In addition to these new applications, Internet connectivity is also expected to be available in the cars of the near future, speed-ing up the global adoption of vehicular communication systems. One of the requirements for connecting vehicles to the Internet is their ability to autoconfigure Internet Protocol (IP) Addresses. In this paper, we propose an optimization to Geographically Scoped stateless Address Configuration (GeoSAC), which is an IP Address Autoconfiguration mechanism for geographically aware location vehicles. The benefits of this optimization are twofold: 1) It can reduce the IP Address configuration time, and 2) it can be used to reduce the signaling overhead of GeoSAC. The optimization requires no changes to the GeoSAC operation, being fully compat-ible with the original solution. We derive an analytical model for the probability of our optimization being effective in realistic sce-narios and for the IP Address configuration time. We also provide a thorough evaluation of the performance improvements of the optimization, including simulations with a realistic model for wire-less technology, real vehicular traces, and experiments with a real prototype, which provide strong support for our analytical model. Index Terms—Geographically Scoped stateless Address Config-uration (GeoSAC), geonetworking, Internet Protocol (IP) Address Autoconfiguration, vehicular ad hoc networks (VANETs)

Carlos J Bernardos - One of the best experts on this subject based on the ideXlab platform.

  • IPv6 Address Autoconfiguration in geonetworking-enabled VANETs: characterization and evaluation of the ETSI solution
    EURASIP Journal on Wireless Communications and Networking, 2012
    Co-Authors: Marco Gramaglia, Ignacio Soto, Maria Calderon, Carlos J Bernardos, Roberto Baldessari
    Abstract:

    In this article we make a thorough characterization and evaluation of the solution standardized by the European Telecommunications Standards Institute for IPv6 transmission of packets over geographical location aware vehicular networks. In particular, we focus on IPv6 Address auto-configuration, one of the required pieces to enable Internet connectivity from vehicles. Communications in vehicular networks are strongly dependent on the availability of multi-hop connectivity to the fixed infrastructure, so also we analyze the probability of achieving this connectivity under different circumstances, and we use the results to identify interesting target scenarios for Address auto-configuration mechanisms. Keeping those scenarios in mind, we perform a characterization and deep evaluation--analytically and by means of simulations--of the standardized IPv6 Address au-toconfiguration solution; proposing some configuration guidelines and highlighting the scenarios where complementary enhancements might be needed.

  • trebol tree based routing and Address Autoconfiguration for vehicle to internet communications
    Vehicular Technology Conference, 2011
    Co-Authors: Marco Gramaglia, Maria Calderon, Carlos J Bernardos
    Abstract:

    Efficient vehicle-to-Internet routing and Address Autoconfiguration are two of the missing pieces required to provide Internet connectivity from vehicles. Here, we propose TREBOL, a tree-based and configurable protocol which benefits from the inherent tree-shaped nature of vehicle to Internet traffic to reduce the signaling overhead while dealing efficiently with the vehicular dynamics. The paper describes the design and rationale of the solution, and presents the results of an experimental validation and performance evaluation, based on extensive simulations and real vehicular traces obtained in the region of Madrid.

  • Overhearing-assisted optimization of Address Autoconfiguration in position-aware VANETs
    2011
    Co-Authors: Marco Gramaglia, Ignacio Soto, Carlos J Bernardos, Maria Calderon
    Abstract:

    Abstract—Vehicular networks allow vehicles to exchange infor-mation that can be used to improve traffic efficiency and drivers’ safety. In addition to these new applications, Internet connectivity is also expected to be available in the cars of the near future, speed-ing up the global adoption of vehicular communication systems. One of the requirements for connecting vehicles to the Internet is their ability to autoconfigure Internet Protocol (IP) Addresses. In this paper, we propose an optimization to Geographically Scoped stateless Address Configuration (GeoSAC), which is an IP Address Autoconfiguration mechanism for geographically aware location vehicles. The benefits of this optimization are twofold: 1) It can reduce the IP Address configuration time, and 2) it can be used to reduce the signaling overhead of GeoSAC. The optimization requires no changes to the GeoSAC operation, being fully compat-ible with the original solution. We derive an analytical model for the probability of our optimization being effective in realistic sce-narios and for the IP Address configuration time. We also provide a thorough evaluation of the performance improvements of the optimization, including simulations with a realistic model for wire-less technology, real vehicular traces, and experiments with a real prototype, which provide strong support for our analytical model. Index Terms—Geographically Scoped stateless Address Config-uration (GeoSAC), geonetworking, Internet Protocol (IP) Address Autoconfiguration, vehicular ad hoc networks (VANETs)

  • survey of ip Address Autoconfiguration mechanisms for manets
    2010
    Co-Authors: Carlos J Bernardos, Hassnaa Moustafa
    Abstract:

    This Internet Draft provides a detailed description of most of the existing IP Autoconfiguration solutions proposed so far. The main aim of this document is to serve as a general reference for the AUTOCONF solution space. We present most of the previously proposed IP AUTOCONF mechanisms in MANETs, showing their key characteristics, conforming to the AUTOCONF problem statement draft and the MANET architecture draft. Furthermore, each solution is analysed based on a number of evaluation considerations.

  • building an ip based community wireless mesh network assessment of pacman as an ip Address Autoconfiguration protocol
    Computer Networks, 2010
    Co-Authors: Carlos J Bernardos, Ignacio Soto, Maria Calderon, Ana Beatriz Solana, Kilian Weniger
    Abstract:

    Wireless mesh networks are experiencing rapid progress and inspiring numerous applications in different scenarios, due to features such as Autoconfiguration, self-healing, connectivity coverage extension and support for dynamic topologies. These particular characteristics make wireless mesh networks an appropriate architectural basis for the design of easy-to-deploy community or neighbourhood networks. One of the main challenges in building a community network using mesh networks is the minimisation of user intervention in the IP Address configuration of the network nodes. In this paper we first consider the process of building an IP-based mesh network using typical residential routers, exploring the options for the configuration of their wireless interfaces. Then we focus on IP Address Autoconfiguration, identifying the specific requirements for community mesh networks and analysing the applicability of existing solutions. As a result of that analysis, we select PACMAN, an efficient distributed Address Autoconfiguration mechanism originally designed for ad-hoc networks, and we perform an experimental study - using off-the-shelf routers and assuming worst-case scenarios - analysing its behaviour as an IP Address Autoconfiguration mechanism for community wireless mesh networks. The results of the conducted assessment show that PACMAN meets all the identified requirements of the community scenario.

Marco Gramaglia - One of the best experts on this subject based on the ideXlab platform.

  • IPv6 Address Autoconfiguration in geonetworking-enabled VANETs: characterization and evaluation of the ETSI solution
    EURASIP Journal on Wireless Communications and Networking, 2012
    Co-Authors: Marco Gramaglia, Ignacio Soto, Maria Calderon, Carlos J Bernardos, Roberto Baldessari
    Abstract:

    In this article we make a thorough characterization and evaluation of the solution standardized by the European Telecommunications Standards Institute for IPv6 transmission of packets over geographical location aware vehicular networks. In particular, we focus on IPv6 Address auto-configuration, one of the required pieces to enable Internet connectivity from vehicles. Communications in vehicular networks are strongly dependent on the availability of multi-hop connectivity to the fixed infrastructure, so also we analyze the probability of achieving this connectivity under different circumstances, and we use the results to identify interesting target scenarios for Address auto-configuration mechanisms. Keeping those scenarios in mind, we perform a characterization and deep evaluation--analytically and by means of simulations--of the standardized IPv6 Address au-toconfiguration solution; proposing some configuration guidelines and highlighting the scenarios where complementary enhancements might be needed.

  • trebol tree based routing and Address Autoconfiguration for vehicle to internet communications
    Vehicular Technology Conference, 2011
    Co-Authors: Marco Gramaglia, Maria Calderon, Carlos J Bernardos
    Abstract:

    Efficient vehicle-to-Internet routing and Address Autoconfiguration are two of the missing pieces required to provide Internet connectivity from vehicles. Here, we propose TREBOL, a tree-based and configurable protocol which benefits from the inherent tree-shaped nature of vehicle to Internet traffic to reduce the signaling overhead while dealing efficiently with the vehicular dynamics. The paper describes the design and rationale of the solution, and presents the results of an experimental validation and performance evaluation, based on extensive simulations and real vehicular traces obtained in the region of Madrid.

  • Performance evaluation of a tree-based routing and Address Autoconfiguration for vehicle-to-Internet communications
    2011 11th International Conference on ITS Telecommunications, 2011
    Co-Authors: Marco Gramaglia, Carlos Jesus Bernardos, Maria Calderon, Antonio De La Oliva
    Abstract:

    Vehicular ad hoc networks have proven to be quite useful for broadcast alike communications between nearby cars, but can also be used to provide Internet connectivity from vehicles. In order to do so, vehicle-to-Internet routing and IP Address Autoconfiguration are two critical pieces. TREBOL is a tree-based and configurable protocol which benefits from the inherent tree-shaped nature of vehicle to Internet traffic to reduce the signaling overhead while dealing efficiently with the vehicular dynamics. This paper experimentally evaluates the performance of TREBOL using a Linux implementation under lab-controlled realistic scenarios, including real vehicular traces obtained in the region of Madrid.

  • Overhearing-assisted optimization of Address Autoconfiguration in position-aware VANETs
    IEEE Transactions on Vehicular Technology, 2011
    Co-Authors: Marco Gramaglia, Carlos Jesus Bernardos, Ignacio Soto, Maria Calderon
    Abstract:

    Vehicular networks allow vehicles to exchange information that can be used to improve traffic efficiency and drivers' safety. In addition to these new applications, Internet connectivity is also expected to be available in the cars of the near future, speeding up the global adoption of vehicular communication systems. One of the requirements for connecting vehicles to the Internet is their ability to autoconfigure Internet Protocol (IP) Addresses. In this paper, we propose an optimization to Geographically Scoped stateless Address Configuration (GeoSAC), which is an IP Address Autoconfiguration mechanism for geographically aware location vehicles. The benefits of this optimization are twofold: 1) It can reduce the IP Address configuration time, and 2) it can be used to reduce the signaling overhead of GeoSAC. The optimization requires no changes to the GeoSAC operation, being fully compatible with the original solution. We derive an analytical model for the probability of our optimization being effective in realistic scenarios and for the IP Address configuration time. We also provide a thorough evaluation of the performance improvements of the optimization, including simulations with a realistic model for wireless technology, real vehicular traces, and experiments with a real prototype, which provide strong support for our analytical model.

  • Overhearing-assisted optimization of Address Autoconfiguration in position-aware VANETs
    2011
    Co-Authors: Marco Gramaglia, Ignacio Soto, Carlos J Bernardos, Maria Calderon
    Abstract:

    Abstract—Vehicular networks allow vehicles to exchange infor-mation that can be used to improve traffic efficiency and drivers’ safety. In addition to these new applications, Internet connectivity is also expected to be available in the cars of the near future, speed-ing up the global adoption of vehicular communication systems. One of the requirements for connecting vehicles to the Internet is their ability to autoconfigure Internet Protocol (IP) Addresses. In this paper, we propose an optimization to Geographically Scoped stateless Address Configuration (GeoSAC), which is an IP Address Autoconfiguration mechanism for geographically aware location vehicles. The benefits of this optimization are twofold: 1) It can reduce the IP Address configuration time, and 2) it can be used to reduce the signaling overhead of GeoSAC. The optimization requires no changes to the GeoSAC operation, being fully compat-ible with the original solution. We derive an analytical model for the probability of our optimization being effective in realistic sce-narios and for the IP Address configuration time. We also provide a thorough evaluation of the performance improvements of the optimization, including simulations with a realistic model for wire-less technology, real vehicular traces, and experiments with a real prototype, which provide strong support for our analytical model. Index Terms—Geographically Scoped stateless Address Config-uration (GeoSAC), geonetworking, Internet Protocol (IP) Address Autoconfiguration, vehicular ad hoc networks (VANETs)

Sangchul Kim - One of the best experts on this subject based on the ideXlab platform.

  • analysis of link error effects in manet Address Autoconfiguration protocols
    Journal of Communications and Networks, 2009
    Co-Authors: Sangchul Kim, Jongmoon Chung
    Abstract:

    This paper focuses on message complexity performance analysis of mobile ad hoc network (MANET) Address Autoconfiguration protocols (AAPs) in reference to link errors generated by mobile wireless nodes. An enhancement was made using a proposed retransmission limit, S, to be computed for error recovery (based on the link error probability), to measure message complexity of AAPs in reference to the link error probability, P e . The control procedures for the retransmission limit have been included for each of the AAPs. Retransmission limit control is critical for efficient energy consumption of MANET nodes operating on limited portable energy. O-notation has been applied to analyze the upper bound of the number of messages generated by a MANET group of nodes. The AAPs investigated in this paper are strong duplicate Address detection (DAD), weak DAD with proactive routing protocol (WDP), weak DAD with on-demand routing protocol (WDO), and MANETConf. Each AAP reacts different to link errors, as each AAP has different operational procedures. The required number of broadcasting, unicasting, relaying, and received messages of the nodes participating in a single-node joining procedure is investigated to asymptotically calculate the message complexity of each AAP. Computer simulation was conducted and the results have been analyzed to verify the theoretical message complexity bounds derived. The message complexity of WDP was lowest, closely followed by WDO, based on the simulation results and analysis of the message complexity under nominal situations. The message complexity of MANETConf was higher than WDO, and strong DAD resulted to be most complex among the four AAPs.

  • an adaptive approach to alleviate broadcasting redundancy in manet Address Autoconfiguration protocols
    International Conference on Hybrid Information Technology, 2008
    Co-Authors: Sangchul Kim
    Abstract:

    Scalability is a major research topic in the development of MANET routing algorithms. The network resource of a mobile ad hoc network (MANET) is limited, due to the contention-based wireless communication channel. Instead of using the conventional blind flooding in AAPs, this paper proposes to adopt a dominant pruning (DP) algorithm to reduce the broadcasting redundancy in MANET Address Autoconfiguration protocol (AAP). A novel method to enable AAP to enhance routing capability by suggesting new messages is proposed. Simulation demonstrates that performance improves when the conventional AAPs, such as strong DAD, weak duplicate Address detection (DAD) with proactive routing protocols (WDP), weak DAD with on demand routing protocols (WDO) and MANETconf, are replaced by the proposed algorithms.

  • message complexity analysis of mobile ad hoc network Address Autoconfiguration protocols
    IEEE Transactions on Mobile Computing, 2008
    Co-Authors: Sangchul Kim, Jongmoon Chung
    Abstract:

    This paper proposes a novel method to perform a quantitative analysis of message complexity and applies this method in comparing the message complexity among the mobile ad hoc network (MANET) Address Autoconfiguration protocols (AAPs). The original publications on the AAPs had incomplete parts, making them insufficient to use on practical MANETs. Therefore, the first objective of the research was to complete the AAPs by filling in the missing gaps to make them operational. The missing procedures that were filled in have been developed based on the most logical procedures being accurate to the original protocol publications. The research in this paper finds applications in wireless networks that apply reduced Addresses to achieve less memory usage, smaller overhead, and higher throughput (for example, the IPv6 low-power wireless personal Address network (6LoWPAN)), but, as a result, possess a high Address duplication probability. This research consists of two cases, where the first case deals with the message complexity analysis of the single-node joining case (SJC) and the second case deals with the complexity analysis of the MANET group merging case (GMC).

  • message complexity analysis of manet Address Autoconfiguration algorithms in group merging case
    International Conference on Conceptual Structures, 2007
    Co-Authors: Sangchul Kim
    Abstract:

    This paper focuses on the derivation of the message complexity when two mobile ad hoc network (MANET) groups merge together, where the network groups already have been configured with IP Addresses by using Address Autoconfiguration protocols (AAPs). The message complexity of the MANET group merging case (GMC) in Strong DAD, Weak DAD with proactive routing protocols (WDP), Weak DAD with on-demand routing protocols (WDO), and MANETconf has been derived respectively. In order to verify the derived bounds, analytical simulations that quantify the message complexity of the Address Autoconfiguration process based on the different conflict probabilities are conducted.

  • message complexity analysis of manet Address Autoconfiguration single node joining case
    The Journal of Korean Institute of Communications and Information Sciences, 2007
    Co-Authors: Sangchul Kim
    Abstract:

    This paper proposes a novel method to perform a quantitative analysis of message complexity and applies this method in comparing the message complexity among the mobile ad hoc network (MANET) Address Autoconfiguration protocols (AAPs). To obtain the upper bound of the message complexity of the protocols, the O-notation of a MANET group of N nodes has been applied. The message complexity of the single node joining case in Strong DAD, Weak DAD with proactive routing protocols (WDP), Weak DAD with on-demand routing protocols (WDO), and MANETconf has been derived as n(mO(N)+O(t)), n(O(N)+O(t)), n(O(N)+2O(t)), and nO((t+1)N)+O(N)+O(2) respectively. In order to verify the bounds, analytical simulations that quantify the message complexity of the Address Autoconfiguration process based on the different coflict probabilities are conducted.

Jongmoon Chung - One of the best experts on this subject based on the ideXlab platform.

  • analysis of link error effects in manet Address Autoconfiguration protocols
    Journal of Communications and Networks, 2009
    Co-Authors: Sangchul Kim, Jongmoon Chung
    Abstract:

    This paper focuses on message complexity performance analysis of mobile ad hoc network (MANET) Address Autoconfiguration protocols (AAPs) in reference to link errors generated by mobile wireless nodes. An enhancement was made using a proposed retransmission limit, S, to be computed for error recovery (based on the link error probability), to measure message complexity of AAPs in reference to the link error probability, P e . The control procedures for the retransmission limit have been included for each of the AAPs. Retransmission limit control is critical for efficient energy consumption of MANET nodes operating on limited portable energy. O-notation has been applied to analyze the upper bound of the number of messages generated by a MANET group of nodes. The AAPs investigated in this paper are strong duplicate Address detection (DAD), weak DAD with proactive routing protocol (WDP), weak DAD with on-demand routing protocol (WDO), and MANETConf. Each AAP reacts different to link errors, as each AAP has different operational procedures. The required number of broadcasting, unicasting, relaying, and received messages of the nodes participating in a single-node joining procedure is investigated to asymptotically calculate the message complexity of each AAP. Computer simulation was conducted and the results have been analyzed to verify the theoretical message complexity bounds derived. The message complexity of WDP was lowest, closely followed by WDO, based on the simulation results and analysis of the message complexity under nominal situations. The message complexity of MANETConf was higher than WDO, and strong DAD resulted to be most complex among the four AAPs.

  • message complexity analysis of mobile ad hoc network Address Autoconfiguration protocols
    IEEE Transactions on Mobile Computing, 2008
    Co-Authors: Sangchul Kim, Jongmoon Chung
    Abstract:

    This paper proposes a novel method to perform a quantitative analysis of message complexity and applies this method in comparing the message complexity among the mobile ad hoc network (MANET) Address Autoconfiguration protocols (AAPs). The original publications on the AAPs had incomplete parts, making them insufficient to use on practical MANETs. Therefore, the first objective of the research was to complete the AAPs by filling in the missing gaps to make them operational. The missing procedures that were filled in have been developed based on the most logical procedures being accurate to the original protocol publications. The research in this paper finds applications in wireless networks that apply reduced Addresses to achieve less memory usage, smaller overhead, and higher throughput (for example, the IPv6 low-power wireless personal Address network (6LoWPAN)), but, as a result, possess a high Address duplication probability. This research consists of two cases, where the first case deals with the message complexity analysis of the single-node joining case (SJC) and the second case deals with the complexity analysis of the MANET group merging case (GMC).