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 TitleDate AddedCompany
whitepaper GKMPAN: An Efficient Group Rekeying Scheme for Secure Multicast in Ad-Hoc Networks2009-01-01 University of Texas
  This paper presents GKMPAN, an efficient and scalable group rekeying protocol for secure multicast in ad hoc networks. Their protocol exploits the property of ad hoc networks that each member of a group is both a host and a router, and distributes the group key to member nodes via a secure hop-by-hop propagation scheme. A probabilistic scheme based on pre-deployed symmetric keys is used for implementing secure channels between members for group key distribution. GKMPAN also includes a novel distributed scheme for efficiently updating the pre-deployed keys.

Tags: Security Administration, Network Technologies		   
whitepaper Multicast Topology Inference From Measured End-to-End Loss2009-01-01 AT&T Intellectual Property
  The use of multicast inference on end-to-end measurement has recently been proposed as a means to infer network internal characteristics such as packet link loss rate and delay. This paper proposes three types of algorithm that use loss measurements to infer the underlying multicast topology: a grouping estimator that exploits the monotonicity of loss rates with increasing path length; a maximum likelihood estimator; and a Bayesian estimator. They establish their consistency, compare their complexity and accuracy, and analyze the modes of failure and their asymptotic probabilities.

Tags: Software Development Tools		   
whitepaper Rendezvous Point Engineering2008-11-01 Cisco Systems
  A Rendezvous Point (RP) is a router in a multicast network domain that acts as a shared root for a multicast shared tree. Any number of routers can be configured to work as RPs and they can be configured to cover different group ranges. For correct operation, every multicast router within a Protocol Independent Multicast (PIM) domain must be able to map a particular multicast group address to the same RP. This paper attempts to describe, compare and contrast the different methods for deploying RPs.   
whitepaper Reliable Multicast in Wireless Sensor Networks2008-08-29 University of Berne
  Multicasting in Wireless Sensor Networks (WSNs) is an efficient way to disseminate the same data to multiple receivers. For critical tasks such as code updates, reliability would be a desirable feature, in order to use multicasting for such scenarios. Due to the nature of WSNs, several problems exist that make realizing an efficient, reliable and energy consumption friendly implementation a challenging task. This paper describes the challenges of such an implementation and proposes a solution for designing a reliable multicast solution based on IP Multicast and Overlay Multicast. They discuss several scenarios and depict the different advantages and limitations of the solutions proposed.

Tags: Network Management, Network Technologies		   
whitepaper CPM: Adaptive Video-on-Demand With Cooperative Peer Assists and Multicast2008-08-29 AT&T Intellectual Property
  This paper presents CPM, a unified approach that exploits server multicast, assisted by peer downloads, to provide efficient Video-on-Demand (VoD) in a service provider environment. They describe their architecture and show how CPM is designed to dynamically adapt to a wide range of situations including highly different peer-upload bandwidths, content popularity, user request arrival patterns (including flash-crowds), video library size, and subscriber population. They demonstrate the effectiveness of CPM using simulations (based on the an actual implementation codebase) across the range of situations described above and show that CPM does significantly better than traditional unicast, different forms of multicast, as well as peer-to-peer schemes. Along with synthetic parameters, they augment their experiments using data from a deployed VoD service to evaluate the performance of CPM.

Tags: Network Technologies, Network Technologies		   
whitepaper Multicast Routing in Wireless Sensor Networks2008-08-15 Brno University of Technology
  This paper deals with the state of the nowadays research of the multicast routing protocols for wireless sensor networks. They describe how to establish efficient multicast tree for wireless sensor network environment and introduce the two base groups of the multicast routing protocols. For these groups, blind flooding and geographic protocols, they introduce the main protocols representatives.

Tags: Mobile and Wireless, Network Management		   
whitepaper Hop-by-Hop Multicast Transport for Mobile Ad Hoc Wireless Networks2008-07-17 Institute of Electrical and Electronics Engineers
  Multicast transport is a challenging problem because the source must provide congestion control and reliability for a tree, rather than a single path. This problem is made even more difficult in mobile ad hoc networks due to problems caused by contention, spatial reuse, and mobility. This paper designs a hop-by-hop multicast transport protocol, which pushes transport functionality into the core of the network. Although this requires per-flow state, a hop-by-hop approach simplifies congestion control, enables local recovery of lost packets, and provides low delay and efficient use of wireless capacity. The paper uses a simulation study to demonstrate the effectiveness of this approach and compare its efficiency to application-layer multicast.

Tags: Mobile and Wireless		   
whitepaper Raptor Code-Based Video Multicast Over IEEE 802.11 WLAN2008-06-30 Seoul National University
  This paper applies a Raptor code-based forward error correcting scheme right above the Medium Access Control (MAC) layer in order to ensure the reliability of the video multicast over IEEE 802.11 Wireless LANs (WLANs). Both Raptor code rate and PHYsical layer (PHY) transmission rate are dynamically adapted according to the channel condition. The paper considers a number of MAC schemes for data transmission in order to enhance the efficiency. The performance of the proposed scheme is evaluated in terms of the perceived video quality, i.e., Peak Signal-to-Noise Ratio (PSNR).

Tags: Mobile and Wireless, Mobile and Wireless		   
whitepaper Optimizing Campus Networks for Video2008-06-17 Cisco Systems
  For enterprise companies, digital video has quickly evolved from a novelty to a necessity, encompassing a wide range of applications, including desktop video, videoconferencing, digital signage, and video surveillance. For IT managers, this creates a new set of challenges. Video is much more sensitive to latency, jitter, and packet loss than other business applications. While adding bandwidth might help, this can be both expensive and inefficient. This webcast will reveal the technical steps users can take now to optimize the network to deliver high-quality video applications. The attendee will discover how to significantly improve the end-user experience without compromising the performance of the other mission-critical business applications.

Tags: Network Management, Network Technologies		   
whitepaper Addressing Heterogeneity, Scalability, and Privacy in Layered Multicast Congestion Control2008-05-15 AT&T Labs-Research
  Multicast is attracting a resurgence of interest because it has a potential to address the explosively growing need for efficient streaming of large-volume Internet content. However, to realize the potential, large-scale multicast distribution requires effective congestion control. This paper designs SIM, a protocol that combines three distinct mechanisms (Selective participation, Intra-group transmission adjustment, and Menu adaptation) to provide a general solution for efficient fair scalable privacy-preserving multicast congestion control with heterogeneous receivers. Whereas the individual mechanisms have appeared in earlier multicast protocols, the main contribution lies in the cohesive integration of the techniques. SIM achieves such integration by operating the three mechanisms at different timescales and distributing the responsibility for control to different entities in the network.

Tags: Network Management