ZDNet / IT Library / Networking and Communications / Network Technologies / Multicasting /
Multicasting
Latest whitepapers Sort by Popularity
Wireless Video Multicast in Tactical Environments
There has been a tremendous increase in demand for real-time video applications over military networks. Multicast provides an efficient solution for simultaneous content delivery to a group of users. It is especially valuable for military applications, as it saves network resources by sharing the data streams across receivers. Even with ever increasing channel bandwidth and computation power, efficiently multicasting video over the tactical edge is still challenging due to factors such as higher packet loss ratio, bandwidth variations and the heterogeneity of the users. This paper explores the use of omni-directional relays to improve the performance of wireless video multicast in tactical environments. The paper focuses on assessing the trade-off between total relay energy, coverage area and video quality.
166 days ago by Institute of Electrical and Electronics EngineersA Performance Study of Reactive Multicast Routing Protocols in Virtual Class Room Using Mobile Ad Hoc Network
A great deal of excitement has recently propelled Mobile Learning to the forefront of educational technology. The exponential growth of mobile technology in the recent years, increase in the availability of high-bandwidth network, advances in wireless technologies and popularity of handheld devices, have opened up new accessibility opportunities for education. Approach: Virtual class room using MANET had been proposed to enhance the m-Learning opportunities in a residential institution. Results: This environment transferred both large and small volume of data to the particular group members. Generally multicasting supports group oriented computing. Such a group oriented service required a suitable multicast routing protocol. Two standard multicast routing protocols were implemented and analyzed for tree (MAODV) and mesh (ODMRP) based approach.
174 days ago by Science PublicationsCase Study: D-Link Lends Network Performance To Breakthrough HIPerWall Video Wall Display
Hiperwall, is a commercial video wall display technology company that enables users to build a scalable, high performance video wall from ordinary computers, monitors and an Ethernet network. When readying the impressive display for customer demonstrations at Hiperwall company headquarters, located in a lab on the UC Irvine campus, CEO of the company and his team ran into a snag. They needed to seamlessly stream various types of content - including unicast, multicast and broadcast formats - to the display, but were experiencing 'Flooding' because the existing switch and router equipment could not efficiently handle the content flow. The company decided to switch to D-Link equipment because of a previous relationship between D-Link and UCI. The D-Link equipment delivered all of the performance company hoped for.
297 days ago by D-LinkA Longitudinal Technology Trial - TVPrintCast
While the technology prototype was evaluated on the following parameters including Performance measures, Error free data transmission, Nature of errors, down time etc., ease of use and ability to problem shoot with the technology were the technical research questions, the paper also focused on other research questions to answer as a part of the technology experience. These were to do with the end user experience.
335 days ago by Hewlett-Packard (HP)Overlay AuthoCast: Distributed Sender Authentication in Overlay Multicast
Multicast services raise significant operational and security challenges not only when deployed on the Internet layer, but also in overlay networks. Large P2P groups as emerging from IPTV applications may be abused by unwanted traffic or denial of service attacks through amplified flooding. This paper introduces a distributed, autonomously verifiable scheme for multicast sender authentication, which does not depend on pre-established trust relationships. Based on cryptographic identifiers and passport packets, any overlay peer is enabled to verify the origin of data prior to forwarding and to repel its misuse. Dynamic ingress filtering and individually established gradual trust allow for a lightweight protection of the distribution system in structured overlays.
372 days ago by Fachhochschule für Technik und Wirtschaft BerlinA New Approach to Construct Multicast Trees in MPLS Networks
This paper presents a new approach to construct multicast trees in MPLS networks. This approach utilizes MPLS LSPs between multicast tree branching node routers in order to reduce forwarding states and enhance scalability. In authors approach only routers that are acting as multicast tree branching node for a group need to keep forwarding state for that group. All other non-branching node routers simply forward data packets over traffic engineered unicast routes using MPLS LSPs. This paper briefly discuss MPLS, the multicast scalability problem, merging the two technologies, related works and different techniques for forwarding state reduction.
445 days ago by French National Institute for Research in Computer Science and ControlAd Hoc Wireless Multicast With Mobility Prediction
An ad hoc wireless network is an infrastructureless network composed of mobile hosts. The primary concerns in ad hoc networks are bandwidth limitations and unpredictable topology changes. Thus, efficient utilization of routing packets and immediate recovery of route breaks are critical in routing and multicasting protocols. A multicast scheme, On-Demand Multicast Routing Protocol (ODMRP), has been recently proposed for mobile ad hoc networks. ODMRP is a reactive (on-demand) protocol that delivers packets to destinations on a mesh topology using scoped flooding of data. A number of enhancements can be applied to improve the performance of ODMRP. This paper proposes a mobility prediction scheme to help select stable routes and to perform rerouting in anticipation of topology changes.
445 days ago by University of CaliforniaMulticast Topology Inference From Measured End-to-End Loss
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.
445 days ago by AT&T Intellectual PropertyRendezvous Point Engineering
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.
506 days ago by Cisco SystemsMulticast Routing in Wireless Sensor Networks
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.
584 days ago by Brno University of Technology
