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IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

作者： M. Rossi M. Zorzi F.H.P. Fitzekt Department of Engineering University of Ferrara Ferrara Italy

The success of 3G networks depends on the possibility to attract customers to this new technology. Therefore, new services using the spectrum in an efficient manner while satisfying the customers are needed. We introduce link layer algorithms that are suitable for multicast transmission in 3G cellular systems and we present their impact on video application in terms of play-out buffer requirements. By our approach we show that hybrid ARQ solutions can be successfully employed to perform error control in the multicast transmission case. Using these schemes, performance can be increased thereby increasing system capacity and lowering the cost per served user. In the final part of the paper, these solutions are extended for the important multicast video streaming case, where new schemes are devised to avoid the throughput inefficiencies of fully reliable error recovery algorithms.

关键词： multicast algorithms Automatic repeat request Multiaccess communication Streaming media Forward error correction Electronic mail Delay Data communication Base stations Fading

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Low cost algorithms for message delivery in dynamic multicast groups

Low cost algorithms for message delivery in dynamic multicas...

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International Conference on Distributed Computing Systems

作者： N.E. Belkeir M. Ahamad School of Information and Computer Science Georgia Institute of Technology Atlanta GA USA

Heuristics for constructing low-cost multicast spanning trees in a dynamic environment are investigated. Two heuristic algorithms are developed that update the multicast tree incrementally as the membership changes and reduce the total bandwidth required for sending data and control messages. The broadcast tree based algorithm makes use of a tree structure in the network, and the other algorithm joins a new member to the node that is nearest to it and is already in the multicast tree. A simulation model is used to study the performance of the algorithms and to compare them with the best-known heuristic algorithm developed by D.W. Wall (1980) which computes the multicast tree structure for a given membership of the group.< >

关键词： Costs multicast algorithms Bandwidth Broadcasting multicast communication Availability Computer science Application software Computer networks Tree data structures

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An application layer multicast routing algorithm based on genetic algorithms

An application layer multicast routing algorithm based on ge...

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International Conference on Telecommunications (ConTEL)

作者： Cheng Peng Dai Qionghai Wu Qiufeng Department of Automation Tsinghua University Beijing China

ISBN: (纸本)9531840814

The application layer multicast routing problem is a multi-objective optimization problem. Most existing protocols are based on simple geographical rules and focus on either tree cost or application load balance performance. Little attention is pay to the lower level performance. The paper analyzes the constraints on multicast routing, then formalizes three functions to evaluate an application layer multicast tree on three indexes, cost, application layer load balance and network layer load balance, then generates one fitness function to describe the tree's overall performance. Then the paper proposes the ALMR-GA algorithm, a novel application layer multicast routing approach based on genetic algorithms. Numerical simulations show that, compared with existing routing algorithms, the proposed algorithm reduces the tree's cost while satisfying the load balance constraints

关键词： Routing multicast algorithms Genetic algorithms Unicast multicast protocols Performance analysis Cost function Numerical simulation Topology Automation

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Approximation algorithms for Scheduling Real-Time multicast Flows in Wireless LANs

Approximation Algorithms for Scheduling Real-Time Multicast ...

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IEEE Annual Joint Conference: INFOCOM, IEEE Computer and Communications Societies

作者： Y. Bejerano D. Lee P. Sinha L. Zhang Bell Laboratories USA Samsung Technology Seoul South Korea CSE Ohio-State University USA

In recent years, numerous large-scale Wireless LANs (WLAN) have been deployed all over the world. However, the shortage of non-interfering channels makes it a challenge for WLANs to efficiently support real-time multicast services. In this paper, we study the problem of efficient scheduling of real-time multicast flows . For mitigating interferences, we allow access-points (APs) to transmit simultaneously only if they are mutually non-interfering and our objective is minimizing the fraction of time used by the APs for servicing the multicast flows. We introduce two multicast strategies, the association strategy for which each user is restricted to receive flows only from its associated AP and the non-association strategy for which a user may also decode transmissions from other APs in its vicinity. Under both strategies, the scheduling problem of minimizing the multicast service time is NP-hard and we propose simple approximation algorithms with provable performance bounds. Our simulations clearly demonstrate that the proposed algorithms yield efficient multicast scheduling.

关键词： Approximation algorithms multicast algorithms Scheduling algorithm Wireless LAN Broadcasting Unicast Interference elimination Frequency conversion Large-scale systems Multimedia communication

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Reliable Performance Evaluation of Rekeying algorithms in Secure multicast

Reliable Performance Evaluation of Rekeying Algorithms in Se...

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IEEE International Symposium on World of Wireless Mobile and Multimedia Networks (WoWMoM)

作者： Abdulhadi Shoufan Ralf Laue Sorin A. Huss Integrated Circuits and Systems Laboratory Department of Computer Science Technische Universität Darmstadt Germany

While a vast number ofsolutions to multicast group rekeying were published in the last years, a common base to evaluate these solutions and compare them with each other is missing. This paper presents a unified way to evaluate the performance of diferent re-keying algorithms running on the server side. A rekeying simulator estimates rekeying costs from a system point of view, which allows a reliable comparison between diferent rekeying algorithms. For this purpose, new system metrics related to rekeying performance are defined: the Rekeying Quality of Service (RQoS) and the Rekeying Access Control (RAC). By means of four simulation modes, these metrics are estimated by the simulator in relation to both the group size and its dynamics. A simulator prototype, implemented in Java, demonstrates the merit of this unified assessment method by means of a comprehensive case study.

关键词： multicast algorithms Costs Cryptography Access control Virtual prototyping Analytical models Integrated circuit reliability Laboratories Computer science Quality of service

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Efficient algorithms for Secure multicast key Management

Efficient Algorithms for Secure Multicast key Management

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Conference on Local Computer Networks (LCN)

作者： Elham Khabiri Said Bettayeb School of Science and Computer Engineering University of Houston Clear Lake USA

Group multicast is becoming a prevalent issue in network applications such as teleconferencing, pay-per-view, and information services. In order to secure group communications by providing confidentiality and trustworthiness of messages, various methods were proposed in the literature. In this paper, we compare some of these methods. In particular, we consider the exclusive basis systems, and the batch re-keying methods. We also simulate the process of subgroup eviction for exclusion basis system (EBS) and we compare the work that needs to be done in a group-join and a group-eviction both in EBS and in batch re-keying process. The comparisons of EBS with algorithms for batch re-keying process show that for group eviction batch process is more efficient while EBS is for group join

关键词： multicast algorithms Unicast File servers Cryptography Authentication Teleconferencing Access protocols Distributed computing Computational efficiency Computer network management

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Adaptive rate-based feedback flow control algorithms-extensions to multicast connections

Adaptive rate-based feedback flow control algorithms-extensi...

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IEEE Symposium on Computers and Communications (ISCC)

作者： Huayan Wang R. Izmailov M. Schwartz EE Department Columbia University NY USA C&C Research Laboratories NEC Inc. Princeton NJ USA

The performance of two previously proposed asymptotically stable unicast flow control algorithms for high-speed networks is compared. We extend one of them to the multicast case. The multicast algorithm is modeled by a set of delay-differential equations. Despite the difficulties in analyzing the second order system with multiple different delays, the algorithm is analytically proven to be stable, and this is supported by extensive simulations. This work should prove useful in the design of multicast flow control algorithms.

关键词： Programmable control Adaptive control Feedback multicast algorithms Algorithm design and analysis Delay Unicast High-speed networks Equations Analytical models

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Optimal multicast Control for Simple Network Coding

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IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 2015年第6期64卷 2375-2386页

作者： Lee, Dujeong Kim, Kyounghye Rhee, June-Koo Kevin Korea Adv Inst Sci & Technol Dept Elect Engn Taejon 305701 South Korea

We propose a network coding strategy for multicast applications called the simple network coding scheme, which takes network coding chances raised among adjacent nodes. The proposed scheme incorporates both intrasession and intersession network coding strategies and effectively improves multicast throughput. We characterize the capacity region of the proposed scheme and derive an optimal control algorithm for the proposed scheme. We perform a complexity analysis for the proposed control algorithm and provide some insights into its practical implementation. For a comparison, we also formulate the capacity region of conventional multicast schemes and provide performance evaluation using a linear programming solver. In empirical analyses, we investigate how the proposed scheme improves multicast throughput gains from various perspectives (i.e., the number of flows, the number of network coded packets, and split-multicast) and find out that most of the gains can be achieved by simple pairwise network coding with non-split-multicast. We observe dramatic throughput gains up to 75% beyond the conventional schemes on random topologies with ten nodes.

关键词： Cross-layer design multicast algorithms network coding optimal control routing

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P³FA: Unified Unicast/multicast Forwarding Algorithm for High-Performance Router/Switch

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IEEE TRANSACTIONS ON CONSUMER ELECTRONICS 2022年第4期68卷 327-335页

作者： Jin, Zhu Jia, Wen-Kang Fujian Normal Univ Coll Photon & Elect Engn Fuzhou 350117 Peoples R China Southeast Univ Natl Mobile Commun Res Lab Nanjing 211189 Peoples R China

High-performance multicast packet switching technologies are evolving to meet the growing demand for scalability on the Internet and datacenters, etc. Implementing a high-performance switch/router relies on a polynomial-time group membership query algorithm within the Packet Forwarding Engines (PFEs) to determine whether a packet is forwarded through an egress. Among these, Bloom filter (BF)-based and Residue Number System (RNS)-based are being considered as two representatives of the membership query algorithms. However, both approaches suffer from some fatal weaknesses such as false-positive probability and time inefficiencies, especially for a carrier-grade PFE with high port-density features. According to similar properties of the RNS, we propose a simplified forwarding algorithm in this paper, named Per-Port Prime Filter Array (P3FA). The simulation results indicate that the P3FA can significantly improve space efficiencies under specific lower egress-diversities conditions. Under the same space constraints, P3FA improves multicast and unicast time efficiency by 1 to 4 orders of magnitude in the port-density 16-1024 range compared to previous works. Although it comes at the expense of hardware cost, it is still acceptable compared to recently improved previous work.

关键词： Routing Switches multicast algorithms Scalability Internet IP networks Performance evaluation multicast communication multicast router switch packet forwarding engine membership querying scalar-pair vectors routing and forwarding (SVRF)

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A Low-Complexity Location-Based Hybrid Multiple Access and Relay Selection in V2X multicast Communications

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IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 2022年第9期71卷 10185-10190页

作者： Wei, Chun-Yi Wang, Yung Kai Natl Taipei Univ Dept Commun Engn New Taipei 23741 Taiwan Natl Yang Ming Chiao Tung Univ Coll Elect & Comp Engn Hsinchu 300 Taiwan

This study investigated relay-assisted mode 1 sidelink (SL) multicast transmission, which encounters interference from mode 2 SL transmission, for use in low-latency vehicle-to-everything communications. To accommodate mode 1-mode 2 SL traffic, we use the hybrid multiple access (MA) approach, which combines orthogonal MA (OMA) and nonorthogonal MA (NOMA) schemes. We introduce a low-complexity location-based hybrid MA algorithm and its associated relay selection that can be used when SL channel state information is unavailable.

关键词： Relays NOMA Vehicle-to-everything Unicast multicast algorithms Complexity theory 3GPP 5G multicast multiple access relay V2X

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