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 TitleDate AddedCompany
whitepaper A Dynamic Stateful Multicast Firewall2007-02-24 University of New South Wales
  Enterprises are faced with the challenge of enabling IP multicast applications without exposing their network to multicast denial-of-service attacks. Current practice is to use firewalls and manually configure them on a per-multicast-session basis. This imposes a high work-load on the network administrator, and severely reduces flexibility for end-users. This paper propose and demonstrate a simple yet powerful multicast firewall algorithm that can, under most conditions, automatically distinguish unsolicited multicast packets and drop them to protect the network from denial-of-service attacks. Inspired by the "Stateful" operation of unicast firewalls, multicast firewall blocks unsolicited multicast packets by maintaining state information on multicast group membership and unicast interactions.

Tags: Intrusion - Tampering, Security Administration		   
whitepaper Why Doesn't PIM Sparse Mode Work With a Static Route to an HSRP Address?2007-02-20 Cisco Systems
  Protocol-Independent Multicast (PIM) is a family of multicast routing protocols that can provide one-to-many and many-to-many distribution of data over the Internet. The "Protocol-independent" part refers to the fact that PIM does not include its own topology discovery mechanism, but instead uses routing information supplied by other traditional routing protocols such as Border Gateway Protocol (BGP). This paper explains why multicast packets are not forwarded when one configures a static route to the Hot Standby Router Protocol (HSRP) address of a Protocol Independent Multicast (PIM) sparse mode neighbor.

Tags: Network Technologies, Network Technologies		   
whitepaper The Use of a Cast to Generate Person-Biased Video Presentations2007-01-30 Hewlett-Packard
  A video presentation is generated using the specification of a "Cast" to direct the emphasis of particular people. It is a simple means of exploiting some additional semantic information obtained using object identification, and can easily be tuned to present many generic stories involving people without any deep semantic knowledge of the actual story. The establishment of a cast allows people-oriented variations of video presentations that are understandable and controllable by a user. Manually establishing the "Cast" is a powerful mechanism for controlling the presentation and provides a psychologically important step for a user to establish ownership over the generated presentation.

Tags: Internet and Web, Software Development Tools		   
whitepaper QoS-Aware Streaming in Overlay Multicast Considering the Selfishness in Construction Action2007-01-17 Simon Fraser University
  Most existing overlay multicast proposals have assumed that the nodes are cooperative and thus focus on the global topology optimization. However, a unique and important characteristic of overlay nodes is that, as application-layer agents, they can be selfish with their own interests. To achieve better Quality-of-Service (QoS) or to minimize forwarding overhead, an overlay node can behave selfishly in the information collection or in the overlay construction. While the former has recently been investigated, the impact of selfishness in the construction action remains unclear. This paper presents the first systematic study on the impact of selfishness in both tree and mesh overlay construction. The investigation considers multiple QoS measures for streaming applications, including stream latency, resolution, and continuity.

Tags: Network Technologies, Internet and Web		   
whitepaper TCP-Like Congestion Control for Layered Multicast Data Transfer2007-01-01 University College London
  This paper presents a novel congestion control algorithm suitable for use with cumulative, layered data streams in the MBone. The algorithm behaves similarly to TCP congestion control algorithms, and shares bandwidth fairly with other instances of the protocol and with TCP flows. It is entirely receiver driven and requires no per-receiver status at the sender, in order to scale to large numbers of receivers. It relies on standard functionalities of multicast routers, and is suitable for continuous stream and reliable bulk data transfer. This paper illustrates the algorithm, characterize its response to losses both analytically and by simulations, and analyse its behaviour using simulations and experiments in real networks.

Tags: Network Technologies		   
whitepaper MTCP: Scalable TCP-Like Congestion Control for Reliable Multicast2007-01-01 North Carolina State University
  The paper presents MTCP, a congestion control scheme for large-scale reliable multicast. Congestion control for reliable multicast is important, because of its wide applications in multimedia and collaborative computing, yet nontrivial, because of the potentially large number of receivers involved. Many schemes have been proposed to handle the recovery of lost packets in a scalable manner, but there is little work on the design and implementation of congestion control schemes for reliable multicast. New techniques are proposed that can effectively handle instances of congestion occurring simultaneously at various parts of a multicast tree.

Tags: Network Technologies		   
whitepaper TCP Vegas-Like Algorithm for Layered Multicast Transmission2007-01-01 Long Island University
  Layered multicast is probably the most elegant solution to tackle the heterogeneity problem in multicast delivery of real-time multimedia streams. However, the multiple join experiments carried out by different receivers in order to detect the available bandwidth make it hard to achieve fairness. This paper presents a simple protocol, inspired from TCP-Vegas, that reduces considerably the unnecessary join experiments while achieving intra-session and inter-session fairness as well as being TCP-Friendly.

Tags: Network Technologies		   
whitepaper Performance Evaluation of a Multicast Congestion Control Protocol2007-01-01 University of Liege
  This paper presents a performance evaluation of the CIFL congestion control protocol for layered multicast transmission. The paper presents an overview of the protocol, whose performance is then considered in a real testbed. Protocol dynamics, robustness and TCP-friendliness are investigated in an environment carrying a layered video stream and experiencing various network conditions in terms of losses and delays. The conducted experiments also illustrate the IGMP leave latency problem.

Tags: Network Technologies		   
whitepaper SBQ: A Simple Scheduler for Fair Bandwidth Sharing Between Unicast and Multicast Flows2007-01-01 Springer Science+Business Media
  This paper proposes a simple scheduler called SBQ (Service-Based Queuing) to share the bandwidth fairly between unicast and multicast flows according to a new definition of fairness referred as the inter-service fairness. The paper utilizes the recently proposed active queue management mechanisms MFQ (Multicast Fair Queuing) to fairly share the bandwidth among all competing flows in the multicast queue.

Tags: Network Technologies, Network Technologies		   
whitepaper MPLS Multicast Traffic Engineering2007-01-01 French National Institute for Research in Computer Science and Control
  This paper defines first the multicast traffic engineering and studies after its particularity comparing to unicast traffic engineering. This paper studies merging multicast and MPLS. The paper presents a taxonomy of different MPLS proposals for multicast TE. The paper describes briefly the approach, the MPLS multicast tree (MMT) protocol which utilizes, in order to reduce forwarding states and enhance scalability, MPLS LSPs between branching node routers of a multicast tree. This paper discusses also implementing a simulator for MMT and finally it presents some simulation results.

Tags: LAN - WAN