2007 2nd International Conference on Communication Systems Software and Middleware最新文献_第5页

Role Based Access Control for UDDI Inquiries UDDI查询基于角色的访问控制

2007 2nd International Conference on Communication Systems Software and Middleware Pub Date : 2007-07-09 DOI: 10.1109/COMSWA.2007.382559

Raymond Peterkin, J. Solomon, D. Ionescu

引用次数: 2

EDRFS: An Effective Distributed Replication File System for Small-File and Data-Intensive Application EDRFS:适用于小文件和数据密集型应用的高效分布式复制文件系统

2007 2nd International Conference on Communication Systems Software and Middleware Pub Date : 2007-07-09 DOI: 10.1109/COMSWA.2007.382422

Bin Cai, C. Xie, Guangxi Zhu

{"title":"EDRFS: An Effective Distributed Replication File System for Small-File and Data-Intensive Application","authors":"Bin Cai, C. Xie, Guangxi Zhu","doi":"10.1109/COMSWA.2007.382422","DOIUrl":"https://doi.org/10.1109/COMSWA.2007.382422","url":null,"abstract":"With the system scale keeping grown, the key challenge is to mask the failures that arise among the system components and to improve the performance of data-intensive applications. This paper designs and implements a cluster-based distributed replication file system EDRFS to meet these critical demands. EDRFS works with a single metadata server and multiple storage nodes, deploys whole-file replication scheme at the file level, and tracks what storage node a file is replicated on. We use a linear hash algorithm to evenly distribute data and load across multiple storage nodes so as to achieve balancing workload and incremental scalability of throughput and storage capacity as the system scale grows. In addition, we employ metadata caches and file data caches in clients to enhance system performance. Furthermore, we deploy a concurrency lock scheme to avoid namespace operation bottleneck and a replicas consistency method to keep a consistent mutation order among replicas of a file. We provide the initial experimental evaluations of our prototypical system on a small-file and data-intensive workload.","PeriodicalId":191295,"journal":{"name":"2007 2nd International Conference on Communication Systems Software and Middleware","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121507759","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 Middleware Architecture for Replica Voting on Fuzzy Data in Dependable Real-time Systems 可靠实时系统中模糊数据副本投票的中间件体系结构

2007 2nd International Conference on Communication Systems Software and Middleware Pub Date : 2007-07-09 DOI: 10.1109/COMSWA.2007.382564

K. Ravindran, K. Kwiat

{"title":"A Middleware Architecture for Replica Voting on Fuzzy Data in Dependable Real-time Systems","authors":"K. Ravindran, K. Kwiat","doi":"10.1109/COMSWA.2007.382564","DOIUrl":"https://doi.org/10.1109/COMSWA.2007.382564","url":null,"abstract":"Majority voting among replicated data collection devices enhances the trust-worthiness of data flowing from a hostile external environment. It allows a correct data fusion and dissemination by the end-users, in the presence of content corruptions and/or timing failures that may possibly occur during data collection. In addition, a device may operate on fuzzy inputs, thereby generating a data that occasionally deviates from the reference datum in physical world. In this paper, we provide a QoS-oriented approach to manage the data flow through various system elements. The application-level QoS parameters we consider are timeliness and accuracy of data. The underlying protocol-level parameters that influence data delivery performance are the data sizes, network bandwidth, device asynchrony, and data fuzziness. A replica voting protocol takes into account the interplay between these parameters as the faulty behavior of malicious devices unfolds in various forms during data collection. Our QoS-oriented approach casts the well-known fault-tolerance techniques, namely, 2-phase voting, with control mechanisms that adapt the data delivery to meet the end-to-end constraints - such as latency, data integrity, and resource cost. The paper describes a middleware architecture to realize our QoS-oriented approach to the management of replicated data flows.","PeriodicalId":191295,"journal":{"name":"2007 2nd International Conference on Communication Systems Software and Middleware","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131514594","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

Efficient Scheduling of Sensor Activity for Information Coverage in Wireless Sensor Networks 无线传感器网络信息覆盖下传感器活动的有效调度

2007 2nd International Conference on Communication Systems Software and Middleware Pub Date : 2007-07-09 DOI: 10.1109/COMSWA.2007.382425

S. Vashistha, A. Azad, A. Chockalingam

引用次数: 5

Competition between SOM Clusters to Model User Authentication System in Computer Networks 计算机网络中SOM集群对用户认证系统模型的竞争

2007 2nd International Conference on Communication Systems Software and Middleware Pub Date : 2007-07-09 DOI: 10.1109/COMSWA.2007.382421

S. Joshi, V. Phoha

引用次数: 6

Suitability of FH codes as TH codes for multiuser UWB Systems 多用户UWB系统中跳频码作为TH码的适用性

2007 2nd International Conference on Communication Systems Software and Middleware Pub Date : 2007-07-09 DOI: 10.1109/COMSWA.2007.382452

Rajendra Singh, A. Chaturvedi

引用次数: 6

Leveraging MAC-layer information for single-hop wireless transport in the Cache and Forward Architecture of the Future Internet 在未来互联网的缓存和转发架构中利用mac层信息进行单跳无线传输

2007 2nd International Conference on Communication Systems Software and Middleware Pub Date : 2007-07-09 DOI: 10.1109/COMSWA.2007.382503

S. Gopal, S. Paul, D. Raychaudhuri

{"title":"Leveraging MAC-layer information for single-hop wireless transport in the Cache and Forward Architecture of the Future Internet","authors":"S. Gopal, S. Paul, D. Raychaudhuri","doi":"10.1109/COMSWA.2007.382503","DOIUrl":"https://doi.org/10.1109/COMSWA.2007.382503","url":null,"abstract":"Cache and forward (CNF) Architecture is a novel architecture aimed at delivering content efficiently to potentially large number of intermittently connected mobile hosts. It uses a reliable hop-by-hop transport mechanism where in-network storage is leveraged to store the entire file in each node, before forwarding it towards the destination(s). Links between nodes may be wired, or wireless, 802.11 a/b/g, cellular, or satellite, or some other upcoming wired/wireless technology. A key aspect in the CNF architecture is to choose the link-layer protocol with parameters such that it optimizes the performance of the link between two CNF nodes. In this paper we propose cross-layer aware transport protocol (CLAP) as a potential candidate for a reliable link-layer protocol between two CNF nodes connected by 802.11 a/b/g link. Leveraging upon MAC layer status information, CLAP quickly adapts its flow control rate to bandwidth fluctuations and maximizes link utilization efficiency. Due to the self-interference problem in wireless links, where ACK packets corresponding to a given flow interfere with the DATA packets of the same flow, CLAP's error control algorithm is based on aggregate negative acknowledgements (NACKs) which reduce the reverse traffic and hence the interference with the data traffic. Since CLAP performs transport layer functionality, we compare it with TCP-SACK -a popular variation of TCP. CLAP significantly outperforms TCP-SACK in both noise-free and noise-prone wireless environments, with throughput gains upward of 150%. For multiple flows, CLAP leverages the fairness characteristics of the underlying MAC layer to achieve fair bandwidth sharing among flows.","PeriodicalId":191295,"journal":{"name":"2007 2nd International Conference on Communication Systems Software and Middleware","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134339044","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: 6

On Utilizing Directional Antenna in 802.11 Networks: Deafness Study 定向天线在802.11网络中的应用:耳聋研究

2007 2nd International Conference on Communication Systems Software and Middleware Pub Date : 2007-07-09 DOI: 10.1109/COMSWA.2007.382502

Guoqing Li, L. Yang

引用次数: 4

Evaluation of IP Fast Reroute Proposals IP快速路由提案的评估

2007 2nd International Conference on Communication Systems Software and Middleware Pub Date : 2007-07-09 DOI: 10.1109/COMSWA.2007.382443

Minas Gjoka, Vinayak Ram, Xiaowei Yang

引用次数: 91

Design of Multi-party Meeting System for Interactive Collaboration 面向交互协作的多方会议系统设计

2007 2nd International Conference on Communication Systems Software and Middleware Pub Date : 2007-07-09 DOI: 10.1109/COMSWA.2007.382585

Sangwoo Han, N. Kim, Kiho Choi, JongWon Kim

引用次数: 18