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检索条件"任意字段=Conference on Multimedia Computing and Networking"

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multimedia checkpoint protocol with lower recovery overhead

Multimedia checkpoint protocol with lower recovery overhead

引用

International conference on Advanced Information networking and Applications (AINA)

作者： S. Osada H. Higaki Department of Computer and Systems Engineering Tokyo Denki University Japan

In order to achieve fault-tolerant distributed systems, checkpoint-recovery has been researched and many protocols have been designed. A global checkpoint taken by the protocols have to be consistent. In conventional network applications, a global checkpoint is consistent if there is no inconsistent message in any communication channel. However, in multimedia network applications, there are different requirements for time-constrained failure-free execution and large-size message transmissions where lost of a part of the message is acceptable by applications. This paper proposes novel criteria, consistency and duplexity for global checkpoints in multimedia network applications.

关键词： Protocols Application software Computer networks Fault tolerance Communication channels Distributed computing Design engineering Systems engineering and theory Communication networks IP networks

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Dynamic fair bandwidth allocation in multiservice CDMA networks

Dynamic fair bandwidth allocation in multiservice CDMA netwo...

引用

International conference on Distributed computing Systems Workshop

作者： Chengzhou Li S. Papavassiliou Broadband Mobile and Wireless Networking Laboratory New Jersey Center for Wireless Networking and Internet Security ECE Department New Jersey Institute of Technology Newark NJ USA

In this paper we study the fundamental problem of allocating with efficiency and fairness the available resources in a CDMA wireless system that supports multi-rate multimedia services. We propose the Channel Adaptive Rate Scheduling (CARS) algorithm which adopts the use of dynamically assigned data rates that match the channel capacity in order to improve the system throughput and overcome the problems associated with the channel changing conditions, the variable system capacity and the transmission power limitation. In addition to the throughput improvement CARS also achieves the objective of fairness by adjusting the users' weights dynamically. The performance analysis and evaluation of our proposed algorithm is achieved via modeling and simulation in terms of achievable throughput and fairness.

关键词： Channel allocation Multiaccess communication Throughput Resource management multimedia systems Adaptive scheduling Dynamic scheduling Scheduling algorithm Channel capacity Performance analysis

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Mobile peer membership management to support multimedia streaming

Mobile peer membership management to support multimedia stre...

引用

International conference on Distributed computing Systems Workshop

作者： Seung-Seok Kang M.W. Mutka Department of Computer Science and Engineering Michigan State University East Lansing MI USA

A CHUM (Cooperating ad Hoc networking to sUpport Messaging) network is an ad hoc network in which mobile devices cooperate to reduce connection costs when accessing wireless global networks. We study how members of a CHUM network cooperate in order to download multimedia data, such as on-air TV programs. Each peer in a CHUM takes turns serving as a proxy, which makes an Internet connection and downloads multimedia data for the other members. Then, the proxy distributes the data to other peers using its ad hoc connection, which we call chumcast. The proxy maintains and updates peer membership information and determines the next CHUM proxy. The CHUM network includes a recovery procedure when a proxy fails or when a CHUM network partitions.

关键词： Streaming media Internet IP networks Ad hoc networks Telecommunication traffic Wireless LAN TV Cost function Bluetooth Computer science

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Design and implementation of knowledge-based videoconference system

Design and implementation of knowledge-based videoconference...

引用

International conference on Advanced Information networking and Applications (AINA)

作者： S. Imai S. Konno T. Suganuma T. Kinoshita Research Institute of Electrical Communication University of Tohoku Japan Information Synergy Center University of Tohoku Japan

We present a design and implementation of a Flexible Videoconference System, FVCS. FVCS aims to reduce the botheration of the users under operational environments with insufficient computational resources, such as the Internet environment with the small-scale computers at home and offices, by embedding flexibility to the conventional videoconference system. We propose a design and implementation of FVCS with knowledge-based multiagent framework. We implement some kinds of prototype systems of FVCS with different types of knowledge embedded in the agent. We also perform some experiments using the prototype systems to evaluate the adaptability of the systems in response to the observed operational situations. From the results of the experiments, the adaptability is influenced by knowledge of agent, and we conclude that the knowledge-based design and implementation is reasonable for construction of FVCS.

关键词： Videoconference Prototypes Embedded computing Multiagent systems Home computing Quality of service Application software Computer networks Degradation multimedia communication

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Proceedings IEEE International SOC conference (Cat. No.03TH8719)

Proceedings IEEE International SOC Conference (Cat. No.03TH8...

引用

IEEE International SOC conference

The following topics are dealt with: embedded memories; SOC methodologies; embedded systems; DSP architectures; RF circuits; multimedia processors; on-chip communication circuits; technology issues for SOC design; DSP circuits; low-power logic and circuits; energy efficient clockless circuits; power aware architecture; interconnect modeling and floor planning; mixed signal circuits; analog circuits; networking; wireless applications; ASIC applications; low-power communication systems.

关键词： Semiconductor memories Digital signal processors multimedia computing Multiprocessor interconnection Integrated circuit modeling Integrated circuit design Integrated circuit interconnections Logic design Mixed analog-digital integrated circuits Analog circuits Application specific integrated circuits

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Enabling user prioritization of multimedia applications

Enabling user prioritization of multimedia applications

引用

International conference on Information Technology: Coding and computing (ITCC)

作者： S. Ghias S. Zeadally High Speed Networking Laboratory Wayne State University Detroit MI USA

Most desktop applications execute on commodity operating systems and networks that support end-user requirements on a best-effort basis. As a result, the end-user cannot indicate to the underlying system the priority of networked applications when they are executed concurrently. Consequently, the performance of these applications is degraded non-deterministically based on the availability of resources and furthermore the degradation is not in the order and to the extent the end-user would want. This unpredictable degradation frequently affects the usefulness of a user session when multiple networked multimedia applications are executed simultaneously. We designed and implemented a prioritization service that allows an end-user to prioritize applications according to the requirements of an individual session. The service has been implemented in user-space and incorporates several scheduling disciplines. We present the design and implementation of the service as well as its performance impact on the overall system.

关键词： Uninterruptible power systems Application software Operating systems Degradation Protocols Computer architecture Video sharing Videoconference Telecommunication traffic Traffic control

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Proceedings. 12th International conference on Computer Communications and Networks (IEEE Cat. No.03EX712)

Proceedings. 12th International Conference on Computer Commu...

引用

International conference on Computer Communications and Networks (ICCCN)

The following topics are dealt with: scheduling; mobile ad hoc networks; Internet; optical networking; optical burst switches; IP network; WDM network; multicasting; routing protocol; cellular network; call admission control; GPRS; peer-to-peer network; voice-over-IP service; multimedia communication service; multimedia application; IEEE 802.11; grid computing; TCP/IP; network traffic; QoS; wireless sensor network; network security; VPN service; packet switched network.

关键词： Land mobile radio cellular systems Optical fiber communication Wavelength division multiplexing Packet switching Transport protocols Wireless LAN multimedia communication Traffic control (communication) Communication switching Communication system traffic

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Rate-based end-to-end congestion control of multimedia traffic in packet switched networks

Rate-based end-to-end congestion control of multimedia traff...

引用

International conference on Information Technology: Coding and computing (ITCC)

作者： S.R. Subramanya Mingsheng Peng J. Sarangapani Department of Computer Science University of Missouri Rolla MO USA Embedded Systems and Networking Laboratory Department of Electrical and Computer Engineering University of Missouri Rolla MO USA

This paper proposes an explicit rate-based end-to-end congestion control mechanism to alleviate congestion of multimedia traffic in packet switched networks such as the Internet. The congestion is controlled by adjusting the transmission rates of the sources in response to the feedback information from destination such as the buffer occupancy, packet arrival rate and service rate at the outgoing link, so that a desired quality of service (QoS) can be met. The QoS is defined in terms of packet loss ratio, transmission delay, power, and network utilization. Comparison studies demonstrate the effectiveness of the proposed scheme over New-Reno TCP (a variant of AIMD: additive increase multiplicative decrease) technique during simulated congestion. Since it is end-to-end, no router support is necessary, the proposed methodology can be readily applied to today's Internet, as well as for real-time video and voice data transfer in unicast networks.

关键词： Communication system traffic control Intelligent networks Packet switching IP networks Quality of service Traffic control Control systems Internet Communication system control Computer science

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A peer-to-peer on-demand streaming service and its performance evaluation

A peer-to-peer on-demand streaming service and its performan...

引用

IEEE International conference on multimedia and Expo (ICME)

作者： Yang Guo Kyoungwon Suh J. Kurose D. Towsley Department of Computer Science University of Massachusetts Amherst MA USA

Providing on-demand video streaming service over the Internet is a challenging task. In this paper, we propose DirectStream, a directory based peer-to-peer video streaming service that efficiently and cost-effectively provides video on-demand service with VCR operation support. We analytically and experimentally examine the system performance, and show that the proposed scheme can significantly reduce the workload posed on the server, and that it scales extremely well as the popularity of the video increases even if participating clients behave non-cooperatively. We propose a QoS parent selection algorithm to construct the appropriate peer-to-peer networks, and discuss how to provide continuous playback in the face of clients' early departures. Our study suggests that peer-to-peer networking is a promising technique to address scalability in on-demand streaming service.

关键词： Peer to peer computing Streaming media Network servers Video on demand Video recording Scalability Bandwidth Costs Analytical models Computer science

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A location based QoS routing protocol for ad hoc networks

A location based QoS routing protocol for ad hoc networks

引用

International conference on Advanced Information networking and Applications (AINA)

作者： Hueying Liu Yiyung Li Department of Electronic Engineering Fu Jen Catholic University Taiwan

ISBN: (纸本)0769519067

An ad hoc system with high topology changing rate makes routing extremely unstable. However stability is an important issue, especially for designing a routing with QoS provision. Recently, the availability of small, inexpensive, and low-power GPS receivers realizes location based routing for ad hoc networks. With the help of location information, the routing stability is significantly improved. The paper investigates the QoS routing problem in ad hoc networks. We propose a location based routing protocol with QoS provision. The proposed scheme, named QoS-GRID, considers a two-tier-grid system configuration to reduce each mobile transmission power so as to enhance the bandwidth utilization. Simulation results show that QoS-GRID establishes a stable QoS guaranteed route and meanwhile saves bandwidth.

关键词： Routing protocols Ad hoc networks Quality of service Network topology Bandwidth Stability Global Positioning System Wireless networks Military computing multimedia systems

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