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Proceedings 21st International Conference on Distributed Computing Systems Workshops最新文献

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A gossip protocol for subgroup multicast 用于子组多播的八卦协议
Proceedings 21st International Conference on Distributed Computing Systems Workshops Pub Date : 2001-04-16 DOI: 10.1109/CDCS.2001.918682
Kate Jenkins, K. Hopkinson, K. Birman
{"title":"A gossip protocol for subgroup multicast","authors":"Kate Jenkins, K. Hopkinson, K. Birman","doi":"10.1109/CDCS.2001.918682","DOIUrl":"https://doi.org/10.1109/CDCS.2001.918682","url":null,"abstract":"Gossip-based multicast can be an effective tool for providing highly reliable and scalable message dissemination. We consider the problem of gossiping within overlapping process groups. If each subgroup independently runs a uniform gossip protocol, then the total gossip overhead could be high for a process that is a member of many subgroups. We present a novel gossip protocol that allows individual subgroup members to trade-off update quality for gossip overhead, enabling processes to belong to several subgroups while maintaining a low total gossip overhead. Our results include a mathematical model for message dissemination under this modified gossip protocol, and an algorithm that computes gossip parameters such that all processes within a subgroup achieve their desired update quality.","PeriodicalId":273489,"journal":{"name":"Proceedings 21st International Conference on Distributed Computing Systems Workshops","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127659033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 52
Efficient changes and variability bandwidth allocation for VBR media streams VBR媒体流的有效变化和可变性带宽分配
Proceedings 21st International Conference on Distributed Computing Systems Workshops Pub Date : 2001-04-16 DOI: 10.1109/CDCS.2001.918719
H. Chao, C. Hung, Y. Chang, Jiann-Liang Chen
{"title":"Efficient changes and variability bandwidth allocation for VBR media streams","authors":"H. Chao, C. Hung, Y. Chang, Jiann-Liang Chen","doi":"10.1109/CDCS.2001.918719","DOIUrl":"https://doi.org/10.1109/CDCS.2001.918719","url":null,"abstract":"Recently, the Internet bandwidth has increased rapidly. Currently available network traffic includes not only text but also graphics, such as JPEG and GIF images. Many multimedia applications are emerging, such as video on demand (VoD) and distance learning. These services involve complicated network connections between servers and clients. To simplify this system, we propose an effective and efficient traffic-smoothing algorithm, which is called ECVBA (Efficient Changes and Variability Bandwidth Allocation). This algorithm not only minimizes the peak rate of a stream but also increases the likelihood of successful variable bit-rate (VBR) stream transmission. The main benefit is that this algorithm can immediately release bandwidth to other demanding sites in the network.","PeriodicalId":273489,"journal":{"name":"Proceedings 21st International Conference on Distributed Computing Systems Workshops","volume":"23 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120818545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
A survey of adaptive applications in mobile computing 移动计算中的自适应应用综述
Proceedings 21st International Conference on Distributed Computing Systems Workshops Pub Date : 2001-04-16 DOI: 10.1109/CDCS.2001.918713
A.M. Al-Bar, I. Wakeman
{"title":"A survey of adaptive applications in mobile computing","authors":"A.M. Al-Bar, I. Wakeman","doi":"10.1109/CDCS.2001.918713","DOIUrl":"https://doi.org/10.1109/CDCS.2001.918713","url":null,"abstract":"Mobile computing is gaining wide acceptance due to the rapid enhancement in wireless communications technologies. This has led to an increase in the demand for mobile information access. However, most mobile computing environments are very limited in resources, hence introducing new requirements and challenges for the software developer and engineer. To address these challenges applications have to be adaptive. We describe mobile computing and its constraints. We describe adaptation spaces as a common framework for understanding the state-of-the-art in adaptive applications. A number of projects are reviewed and discussed. Then, a new rising paradigm in building adaptive applications is introduced based on a component-based architecture. We believe this new approach will provide a more flexible environment for building mobile applications.","PeriodicalId":273489,"journal":{"name":"Proceedings 21st International Conference on Distributed Computing Systems Workshops","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131844638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 32
Adaptive resource allocation for multimedia services in wireless communication networks 无线通信网络中多媒体业务的自适应资源分配
Proceedings 21st International Conference on Distributed Computing Systems Workshops Pub Date : 2001-04-16 DOI: 10.1109/CDCS.2001.918722
Lei Huang, Sunil Kumar, C.-C. Jay Kuo
{"title":"Adaptive resource allocation for multimedia services in wireless communication networks","authors":"Lei Huang, Sunil Kumar, C.-C. Jay Kuo","doi":"10.1109/CDCS.2001.918722","DOIUrl":"https://doi.org/10.1109/CDCS.2001.918722","url":null,"abstract":"Next-generation wireless communication networks aim at supporting multimedia services. It is a challenging problem to efficiently allocate limited and varying network resources in the wireless communication networks to a variety of multimedia services with different characteristics and requirements. In this paper, we extensively investigate the adaptive resource allocation for multimedia services in a wireless network environment. Both user mobility and the nature of multimedia traffic are taken into consideration to design our adaptive resource allocation scheme, which consists of call admission control, resource reservation and bandwidth adaptation for real-time video/audio applications, as well as scheduling for non-real-time data services. Simulation results show the strength of our proposed adaptive scheme.","PeriodicalId":273489,"journal":{"name":"Proceedings 21st International Conference on Distributed Computing Systems Workshops","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114609642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
A location-adaptive virtual networked appliance 位置自适应的虚拟联网设备
Proceedings 21st International Conference on Distributed Computing Systems Workshops Pub Date : 2001-04-16 DOI: 10.1109/CDCS.2001.918708
A. Kusumoto, J. Nakazawa, Y. Tobe, H. Tokuda
{"title":"A location-adaptive virtual networked appliance","authors":"A. Kusumoto, J. Nakazawa, Y. Tobe, H. Tokuda","doi":"10.1109/CDCS.2001.918708","DOIUrl":"https://doi.org/10.1109/CDCS.2001.918708","url":null,"abstract":"The paper presents a new way of constructing a Virtual Networked Appliance (VNA) middleware using location information. In the VNA architecture which we proposed in our previous work (J. Nakazawa et al., 2000), adaptation to the location of a user has not been clearly specified. We call such a location adaptive VNA \"L-VNA\". In L-VNA, location management is encapsulated in the runtime of VNA, thereby eliminating a user's explicit decision for location adaptation. We have implemented L-VNA over JDK1.2 and demonstrated its validity.","PeriodicalId":273489,"journal":{"name":"Proceedings 21st International Conference on Distributed Computing Systems Workshops","volume":"91 9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123172567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Using the floor control mechanism in distributed multimedia presentation system 在分布式多媒体展示系统中使用楼层控制机制
Proceedings 21st International Conference on Distributed Computing Systems Workshops Pub Date : 2001-04-16 DOI: 10.1109/CDCS.2001.918727
T. Shih, L. Deng, Yi-Chun Liao, Chun-Hung Huang, Rong-Chi Chang
{"title":"Using the floor control mechanism in distributed multimedia presentation system","authors":"T. Shih, L. Deng, Yi-Chun Liao, Chun-Hung Huang, Rong-Chi Chang","doi":"10.1109/CDCS.2001.918727","DOIUrl":"https://doi.org/10.1109/CDCS.2001.918727","url":null,"abstract":"Establishing a Web-based distributed multimedia presentation system environment is technical challenge. In this paper, we describe how to present different multimedia objects indispensably on a Web presentation system with a floor control mechanism, to be used in a distance learning environment. The distributed approach is based on an extended timed Petri net model. Using the characterization of extended timed Petri nets, we express the temporal behavior of multimedia objects. Then we introduce the concepts of user interaction. The main goal of our system is to provide a feasible method to represent a schedule and navigate different multimedia objects with user interaction. In addition, users can dynamically modify and verify different kinds of conditions during the presentation. To verify the structural mechanism, we implement an algorithm using the Petri net diagram, analyzing the model by a time schedule of multimedia objects, and we produce a synchronous set of multimedia objects with respect to the time duration. In particular, we consider the interactive facilities needed to support the distance learning requirements. We propose a floor control mechanism which provides four types of control (free access, equal control, group discussion and direct contact). These control mechanisms are sufficient for use in a distance learning environment.","PeriodicalId":273489,"journal":{"name":"Proceedings 21st International Conference on Distributed Computing Systems Workshops","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123663726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Enhancing Jini with group communication 通过群体沟通增强Jini
Proceedings 21st International Conference on Distributed Computing Systems Workshops Pub Date : 2001-04-16 DOI: 10.1109/CDCS.2001.918689
A. Montresor, R. Davoli, Özalp Babaoglu
{"title":"Enhancing Jini with group communication","authors":"A. Montresor, R. Davoli, Özalp Babaoglu","doi":"10.1109/CDCS.2001.918689","DOIUrl":"https://doi.org/10.1109/CDCS.2001.918689","url":null,"abstract":"Reliable group communication has proven to be an important technology for building fault-tolerant applications, yet many frameworks for distributed application development (e.g. DCOM, Jini and Enterprise JavaBeans) do not support it. The only notable exception to this situation is CORBA, which has been recently extended to include a replication service. We claim that lack of group communication support in other development frameworks constitutes a major obstacle for their wider diffusion in the industry. In this paper, we discuss issues related to integrating reliable group communication and Jini technologies.","PeriodicalId":273489,"journal":{"name":"Proceedings 21st International Conference on Distributed Computing Systems Workshops","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129517032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
Quality-based approach to locking multimedia objects 锁定多媒体对象的基于质量的方法
Proceedings 21st International Conference on Distributed Computing Systems Workshops Pub Date : 2001-04-16 DOI: 10.1109/CDCS.2001.918729
N. Nemoto, Katsuya Tanaka, M. Takizawa
{"title":"Quality-based approach to locking multimedia objects","authors":"N. Nemoto, Katsuya Tanaka, M. Takizawa","doi":"10.1109/CDCS.2001.918729","DOIUrl":"https://doi.org/10.1109/CDCS.2001.918729","url":null,"abstract":"It is critical for applications to obtain enough quality of service (QoS) from multimedia objects. Not only states but also QoS of objects are changed if methods are performed on the objects. The objects are required to be consistent in the presence of multiple transactions issuing requests to the objects. We discuss new types of equivalent and conflicting relations among methods with respect to QoS. We introduce novel types of locking modes, to synchronize concurrent accesses to objects based on the conflicting relations. We also discuss how to convert the lock modes.","PeriodicalId":273489,"journal":{"name":"Proceedings 21st International Conference on Distributed Computing Systems Workshops","volume":"378 1-3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120898899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Quality of service and object-oriented middleware - multiple concerns and their separation 服务质量和面向对象的中间件——多重关注点及其分离
Proceedings 21st International Conference on Distributed Computing Systems Workshops Pub Date : 2001-04-16 DOI: 10.1109/CDCS.2001.918695
C. Becker, K. Geihs
{"title":"Quality of service and object-oriented middleware - multiple concerns and their separation","authors":"C. Becker, K. Geihs","doi":"10.1109/CDCS.2001.918695","DOIUrl":"https://doi.org/10.1109/CDCS.2001.918695","url":null,"abstract":"Quality of service (QoS) is an important requirement of today's distribution infrastructures. The popularity of object-oriented middleware makes QoS provision in those infrastructures desirable. The system-dependent nature of QoS necessitates a clear separation of concerns and insulation from the application objects. In this paper, QoS integration is investigated from two viewpoints. First, based on the aspect-oriented programming, the integration of QoS mechanisms into the application objects is presented, and second, the hierarchical structure of QoS mechanisms is addressed in a reflection-based approach.","PeriodicalId":273489,"journal":{"name":"Proceedings 21st International Conference on Distributed Computing Systems Workshops","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121357065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
Application of fuzzy logic for estimation of equivalent capacity in high-speed networks 模糊逻辑在高速网络等效容量估计中的应用
Proceedings 21st International Conference on Distributed Computing Systems Workshops Pub Date : 2001-04-16 DOI: 10.1109/CDCS.2001.918718
L. Barolli, Takako Yamada, Shoichi Yokoyama, A. Koyama, N. Shiratori
{"title":"Application of fuzzy logic for estimation of equivalent capacity in high-speed networks","authors":"L. Barolli, Takako Yamada, Shoichi Yokoyama, A. Koyama, N. Shiratori","doi":"10.1109/CDCS.2001.918718","DOIUrl":"https://doi.org/10.1109/CDCS.2001.918718","url":null,"abstract":"The dynamic nature of high-speed networks poses difficult traffic control problems when trying to achieve efficient use of network resources. To cope with rapidly changing network conditions, traffic control methods for high-speed networks must be adaptive, flexible and intelligent for efficient network management. The use of intelligent methods based on fuzzy logic, neural networks and genetic algorithms can prove to be efficient for such traffic control. In this paper, we propose a fuzzy equivalent capacity estimator for bandwidth allocation in high-speed networks. Performance evaluation via simulation shows that the proposed fuzzy estimator has a good equivalent capacity estimation compared with fluid flow and stationary approximations.","PeriodicalId":273489,"journal":{"name":"Proceedings 21st International Conference on Distributed Computing Systems Workshops","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122213383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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