The Experts below are selected from a list of 2379 Experts worldwide ranked by ideXlab platform

Mikko H Lipasti - One of the best experts on this subject based on the ideXlab platform.

  • virtual circuit tree Multicasting a case for on chip hardware Multicast support
    International Symposium on Computer Architecture, 2008
    Co-Authors: Natalie Enright Jerger, Mikko H Lipasti
    Abstract:

    Current state-of-the-art on-chip networks provide efficiency, high throughput, and low latency for one-to-one (unicast) traffic. The presence of one-to-many (Multicast) or one-to-all (broadcast) traffic can significantly degrade the performance of these designs, since they rely on multiple unicasts to provide one-to-many communication. This results in a burst of packets from a single source and is a very inefficient way of performing Multicast and broadcast communication. This inefficiency is compounded by the proliferation of architectures and coherence protocols that require Multicast and broadcast communication. In this paper, we characterize a wide array of on-chip communication scenarios that benefit from hardware Multicast support. We propose Virtual Circuit Tree Multicasting (VCTM) and present a detailed Multicast Router design that improves network performance by up to 90\% while reducing network activity (hence power) by up to 53%.Our VCTM Router is flexible enough to improve interconnect performance for a broad spectrum of Multicasting scenarios,and achieves these benefits with straightforward and inexpensive extensions to a state-of-the-art packet-switched Router.

  • Virtual circuit tree Multicasting: A case for on-chip hardware Multicast support
    2008
    Co-Authors: Natalie Enright Jerger, Li-shiuan Peh, Mikko H Lipasti
    Abstract:

    Current state-of-the-art on-chip networks provide efficiency, high throughput, and low latency for one-to-one (uni-cast) traffic. The presence of one-to-many (Multicast) or one-to-all (broadcast) traffic can significantly degrade the performance of these designs, since they rely on multiple unicasts to provide one-to-many communication. This results in a burst of packets from a single source and is a very inefficient way of performing these Multicast and broadcast communications. This inefficiency is compounded by the proliferation of architectures and coherence protocols that require Multicast and broadcast communication. In this paper, we characterize a wide array of on-chip communication scenarios that benefit from hardware Multicast support. We propose Virtual Circuit Tree Multicasting (VCTM) and present a detailed Multicast Router design that improves network performance by up to 90 % while reducing network activity (hence power) by 20-29%. Our VCTM Router is flexible enough to improve interconnect performance for a broad spectrum of Multicasting scenarios, and achieves these benefits with straightforward and inexpensive extensions to a state-of-the-art packet-switched Router. I

Jean-jacques Pansiot - One of the best experts on this subject based on the ideXlab platform.

  • 1Quantifying and Mitigating IGMP Filtering in Topology Discovery
    2015
    Co-Authors: Pietro Marchetta, Benoit Donnet, Jean-jacques Pansiot
    Abstract:

    Abstract — Recent developments in Router level topology discov-ery have suggested the introduction of IGMP probing in addition to standard techniques such as traceroute and alias resolution. With a single IGMP probe, one can obtain all Multicast interfaces and links of a Multicast Router. If such a probing is a promising approach, we noticed that IGMP probes are subject to filtering, leading so to the fragmentation of the collected Multicast graph into several disjoint connected components. In this paper, we cope with the fragmentation issue. Our contributions are threefold: (i) we experimentally quantify the damages caused by IGMP filtering on collected topologies of large tier-1 ISPs; (ii) using traceroute data, we construct a hybrid graph and estimate how far each IGMP fragment is from each other; (iii) we provide and experimentally evaluate a recursive approach for reconnecting disjoint Multicast components. The key idea of the third contribution is to recursively apply alias resolution to reassemble disjoint fragments and, thus, progres-sively extend the mapping of the targeted ISP. Data presented in the paper, as well as reconstructed topologies, are freely available a

  • Local and dynamic analysis of internet Multicast Router topology
    Annales Des Télécommunications, 2007
    Co-Authors: Jean-jacques Pansiot
    Abstract:

    We study data on Routers topology gathered using IGMP messages. Although this mechanism is limited to Multicast Routers we show that it allows getting precise information on the local topology of Routers. This information is difficult to obtain with classical tools based on traceroute. Moreover its low cost allows to frequently collect data and to study the dynamics of this topology.

Natalie Enright Jerger - One of the best experts on this subject based on the ideXlab platform.

  • virtual circuit tree Multicasting a case for on chip hardware Multicast support
    International Symposium on Computer Architecture, 2008
    Co-Authors: Natalie Enright Jerger, Mikko H Lipasti
    Abstract:

    Current state-of-the-art on-chip networks provide efficiency, high throughput, and low latency for one-to-one (unicast) traffic. The presence of one-to-many (Multicast) or one-to-all (broadcast) traffic can significantly degrade the performance of these designs, since they rely on multiple unicasts to provide one-to-many communication. This results in a burst of packets from a single source and is a very inefficient way of performing Multicast and broadcast communication. This inefficiency is compounded by the proliferation of architectures and coherence protocols that require Multicast and broadcast communication. In this paper, we characterize a wide array of on-chip communication scenarios that benefit from hardware Multicast support. We propose Virtual Circuit Tree Multicasting (VCTM) and present a detailed Multicast Router design that improves network performance by up to 90\% while reducing network activity (hence power) by up to 53%.Our VCTM Router is flexible enough to improve interconnect performance for a broad spectrum of Multicasting scenarios,and achieves these benefits with straightforward and inexpensive extensions to a state-of-the-art packet-switched Router.

  • Virtual circuit tree Multicasting: A case for on-chip hardware Multicast support
    2008
    Co-Authors: Natalie Enright Jerger, Li-shiuan Peh, Mikko H Lipasti
    Abstract:

    Current state-of-the-art on-chip networks provide efficiency, high throughput, and low latency for one-to-one (uni-cast) traffic. The presence of one-to-many (Multicast) or one-to-all (broadcast) traffic can significantly degrade the performance of these designs, since they rely on multiple unicasts to provide one-to-many communication. This results in a burst of packets from a single source and is a very inefficient way of performing these Multicast and broadcast communications. This inefficiency is compounded by the proliferation of architectures and coherence protocols that require Multicast and broadcast communication. In this paper, we characterize a wide array of on-chip communication scenarios that benefit from hardware Multicast support. We propose Virtual Circuit Tree Multicasting (VCTM) and present a detailed Multicast Router design that improves network performance by up to 90 % while reducing network activity (hence power) by 20-29%. Our VCTM Router is flexible enough to improve interconnect performance for a broad spectrum of Multicasting scenarios, and achieves these benefits with straightforward and inexpensive extensions to a state-of-the-art packet-switched Router. I

Albert S Rabara - One of the best experts on this subject based on the ideXlab platform.

  • Weeding Wormhole Attack in MANET Multicast Routing using Two Novel Techniques- LP 3 and NAWA 2
    2011
    Co-Authors: S Vijayalakshmi, Albert S Rabara
    Abstract:

    Mobile Adhoc Network (MANET) with its unique and special characteristics is prone to a host of security threats from within and outside the network. The MANET architecture is well suited for conducting Multicast communications as this greatly reduces the number of Multicast packets traversing the network. The replication of Multicast packets by the intermediate downstream Multicast Router is demand based and is determined by the number of fresh receivers in the group. This greatly paves way for network resource optimization and a good trail of performance parameters like MPDR, Throughput, Jitter and Endto-End Delay. It is literally bogging down to construe a localized MANET as a single flat larger group. So the concept of orchestrating hierarchical group architecture within MANET dawned which led to the definition of Iolus framework. The hierarchical secure Multicast distribution tree created within MANET backed by Iolus framework is prone to a array of attacks. One such prominent insider attack is wormhole attack where the two colluding adversaries conspire to short-circuit the flow of packets to a foreign network through an out-of-band high bandwidth link. The implication of this attack in unicast routing of MANET is less pronounced due to the limited number of participating entities. But this attack has a large telling effect on Multicast routing as it involves multiple receivers and numerous intermediate Multicast Routers. The possibility of compromising the internal group node as a wormhole colluding agent is more common in Multicast than in unicast. This threat marks an unprecedented intensity by divulging more faction of data thereby rendering the remedial process a huge flop. The real intent of the attacker is not to disrupt the Multicast communication but in abetting the mass divulgence of Multicast data to unauthorized group members. Two novel solutions viz.

  • weeding wormhole attack in manet Multicast routing using two novel techniques lp3 and nawa2
    International Journal of Computer Applications, 2011
    Co-Authors: S Vijayalakshmi, Albert S Rabara
    Abstract:

    Adhoc Network (MANET) with its unique and special characteristics is prone to a host of security threats from within and outside the network. The MANET architecture is well suited for conducting Multicast communications as this greatly reduces the number of Multicast packets traversing the network. The replication of Multicast packets by the intermediate downstream Multicast Router is demand based and is determined by the number of fresh receivers in the group. This greatly paves way for network resource optimization and a good trail of performance parameters like MPDR, Throughput, Jitter and End- to-End Delay. It is literally bogging down to construe a localized MANET as a single flat larger group. So the concept of orchestrating hierarchical group architecture within MANET dawned which led to the definition of Iolus framework. The hierarchical secure Multicast distribution tree created within MANET backed by Iolus framework is prone to a array of attacks. One such prominent insider attack is wormhole attack where the two colluding adversaries conspire to short-circuit the flow of packets to a foreign network through an out-of-band high bandwidth link. The implication of this attack in unicast routing of MANET is less pronounced due to the limited number of participating entities. But this attack has a large telling effect on Multicast routing as it involves multiple receivers and numerous intermediate Multicast Routers. The possibility of compromising the internal group node as a wormhole colluding agent is more common in Multicast than in unicast. This threat marks an unprecedented intensity by divulging more faction of data thereby rendering the remedial process a huge flop. The real intent of the attacker is not to disrupt the Multicast communication but in abetting the mass divulgence of Multicast data to unauthorized group members. Two novel solutions viz., Limiting Packet Propagation Parameter (LP 3 ) and Neighbor Aware Wormhole Adversary Axing (NAWA 2 ) has been proposed

S Vijayalakshmi - One of the best experts on this subject based on the ideXlab platform.

  • Weeding Wormhole Attack in MANET Multicast Routing using Two Novel Techniques- LP 3 and NAWA 2
    2011
    Co-Authors: S Vijayalakshmi, Albert S Rabara
    Abstract:

    Mobile Adhoc Network (MANET) with its unique and special characteristics is prone to a host of security threats from within and outside the network. The MANET architecture is well suited for conducting Multicast communications as this greatly reduces the number of Multicast packets traversing the network. The replication of Multicast packets by the intermediate downstream Multicast Router is demand based and is determined by the number of fresh receivers in the group. This greatly paves way for network resource optimization and a good trail of performance parameters like MPDR, Throughput, Jitter and Endto-End Delay. It is literally bogging down to construe a localized MANET as a single flat larger group. So the concept of orchestrating hierarchical group architecture within MANET dawned which led to the definition of Iolus framework. The hierarchical secure Multicast distribution tree created within MANET backed by Iolus framework is prone to a array of attacks. One such prominent insider attack is wormhole attack where the two colluding adversaries conspire to short-circuit the flow of packets to a foreign network through an out-of-band high bandwidth link. The implication of this attack in unicast routing of MANET is less pronounced due to the limited number of participating entities. But this attack has a large telling effect on Multicast routing as it involves multiple receivers and numerous intermediate Multicast Routers. The possibility of compromising the internal group node as a wormhole colluding agent is more common in Multicast than in unicast. This threat marks an unprecedented intensity by divulging more faction of data thereby rendering the remedial process a huge flop. The real intent of the attacker is not to disrupt the Multicast communication but in abetting the mass divulgence of Multicast data to unauthorized group members. Two novel solutions viz.

  • weeding wormhole attack in manet Multicast routing using two novel techniques lp3 and nawa2
    International Journal of Computer Applications, 2011
    Co-Authors: S Vijayalakshmi, Albert S Rabara
    Abstract:

    Adhoc Network (MANET) with its unique and special characteristics is prone to a host of security threats from within and outside the network. The MANET architecture is well suited for conducting Multicast communications as this greatly reduces the number of Multicast packets traversing the network. The replication of Multicast packets by the intermediate downstream Multicast Router is demand based and is determined by the number of fresh receivers in the group. This greatly paves way for network resource optimization and a good trail of performance parameters like MPDR, Throughput, Jitter and End- to-End Delay. It is literally bogging down to construe a localized MANET as a single flat larger group. So the concept of orchestrating hierarchical group architecture within MANET dawned which led to the definition of Iolus framework. The hierarchical secure Multicast distribution tree created within MANET backed by Iolus framework is prone to a array of attacks. One such prominent insider attack is wormhole attack where the two colluding adversaries conspire to short-circuit the flow of packets to a foreign network through an out-of-band high bandwidth link. The implication of this attack in unicast routing of MANET is less pronounced due to the limited number of participating entities. But this attack has a large telling effect on Multicast routing as it involves multiple receivers and numerous intermediate Multicast Routers. The possibility of compromising the internal group node as a wormhole colluding agent is more common in Multicast than in unicast. This threat marks an unprecedented intensity by divulging more faction of data thereby rendering the remedial process a huge flop. The real intent of the attacker is not to disrupt the Multicast communication but in abetting the mass divulgence of Multicast data to unauthorized group members. Two novel solutions viz., Limiting Packet Propagation Parameter (LP 3 ) and Neighbor Aware Wormhole Adversary Axing (NAWA 2 ) has been proposed