1994 First Workshop on Mobile Computing Systems and Applications最新文献

Transparent Resource Discovery for Mobile Computers 移动计算机的透明资源发现

1994 First Workshop on Mobile Computing Systems and Applications Pub Date : 1994-12-08 DOI: 10.1109/WMCSA.1994.40

P. Bhagwat, S. Tripathi

引用次数: 12

Experience with Connected and Disconnected Operation of Portable Notebook Computers in Distributed Systems 便携式笔记本电脑在分布式系统中的连接和断开操作经验

1994 First Workshop on Mobile Computing Systems and Applications Pub Date : 1994-12-08 DOI: 10.1109/WMCSA.1994.23

D. Huizinga, K. A. Heflinger

{"title":"Experience with Connected and Disconnected Operation of Portable Notebook Computers in Distributed Systems","authors":"D. Huizinga, K. A. Heflinger","doi":"10.1109/WMCSA.1994.23","DOIUrl":"https://doi.org/10.1109/WMCSA.1994.23","url":null,"abstract":"DOC (Disconnected Operation Cache) is a two-level client caching system designed and implemented to support connected and disconnected operation of small form-factor, battery powered portable computers. This paper describes some design features of DOC, and our experiences with running it in the software engineering environment of AST Research. The uniqueness of the DOC project stems from the fact that it has been designed to completely support client caching and disconnected operation of currently existing portable notebook computers. The AST's local area network consisting of several Novell servers and top of the line notebooks running MS/DOS 6.2 as clients communicating via an Ethernet connection are used to support the system and perform experiments. DOC supports \"connected\", \"partially disconnected\", and \"disconnected\" modes of operation. The partially disconnected mode of operation has been designed to permit DOC to respond to requests on certain files that are not modified frequently, without server involvement. Results of our experiments indicate not only considerable performance gains for \"connected\" and \"partially disconnected\" system but also successful operation in the disconnected mode.","PeriodicalId":143500,"journal":{"name":"1994 First Workshop on Mobile Computing Systems and Applications","volume":"98 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120884620","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: 17

On Travelling Incognito 关于隐姓名牌旅行

1994 First Workshop on Mobile Computing Systems and Applications Pub Date : 1994-12-08 DOI: 10.1109/WMCSA.1994.29

A. Herzberg, H. Krawczyk, G. Tsudik

引用次数: 45

Improving End-to-End Performance of TCP over Mobile Internetworks 提高TCP在移动互联中的端到端性能

1994 First Workshop on Mobile Computing Systems and Applications Pub Date : 1994-12-08 DOI: 10.1109/WMCSA.1994.25

Raj Yavatkar, N. Bhagawat

引用次数: 233

Are “Disks in the Air” Just Pie in the Sky? “空中飞盘”只是空中馅饼吗?

1994 First Workshop on Mobile Computing Systems and Applications Pub Date : 1994-12-08 DOI: 10.1109/WMCSA.1994.45

S. Zdonik, M. Franklin, R. Alonso, S. Acharya

{"title":"Are “Disks in the Air” Just Pie in the Sky?","authors":"S. Zdonik, M. Franklin, R. Alonso, S. Acharya","doi":"10.1109/WMCSA.1994.45","DOIUrl":"https://doi.org/10.1109/WMCSA.1994.45","url":null,"abstract":"Mobile computers and wireless networks are emerging technologies which will soon make ubiquitous computing a reality. In the wireless environment, mobile clients may often be disconnected from stationary server machines or may have only a low-bandwidth channel for sending messages to servers. This environment raises new challenges for the support of database applications for three reasons: 1) the limited storage capacities of mobile machines, 2) the inability to accurately predict the future data needs of many data-intensive applications, and 3) the need to provide clients with new or updated data values in order to ensure consistent data access. One way (perhaps the only way) to address these challenges is to provide the stationary server machines with a relatively high bandwidth channel over which to broadcast portions of the database. Wireless networks are but one compelling example of the more general class of asymmetric cornmunication environments, which also includes CATV networks and information distribution services. We have proposed a mechanism called Broadcast Disks to provide database access in asymmetric communication environments. By appropriate organization of the broadcast program, an arbitrarlly fine-grained memory hierarchy can be created. Such a hierarchy raises fundamental new issues for pre-fetching and client cache management. In this short paper we present a brief overview of asymmetric environments, our novel approach to organizing broadcast disks and some initial simulation results.","PeriodicalId":143500,"journal":{"name":"1994 First Workshop on Mobile Computing Systems and Applications","volume":"27 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131269967","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: 84

A Group Communication Approach for Mobile Computing 移动计算中的群通信方法

1994 First Workshop on Mobile Computing Systems and Applications Pub Date : 1994-12-08 DOI: 10.1109/WMCSA.1994.3

Kenjiro Cho, K. Birman

引用次数: 33

An Indoor Wireless System for Personalized Shopping Assistance 一种室内无线个性化购物辅助系统

1994 First Workshop on Mobile Computing Systems and Applications Pub Date : 1994-12-08 DOI: 10.1109/WMCSA.1994.8

A. Asthana, M. Cravatts, P. Krzyzanowski

引用次数: 147

An Architecture to Simplify Communicating Applications 简化通信应用程序的体系结构

1994 First Workshop on Mobile Computing Systems and Applications Pub Date : 1994-12-08 DOI: 10.1109/WMCSA.1994.44

R. O'Hara

引用次数: 3

Asynchronous Video Coding for Wireless Transport 无线传输异步视频编码

1994 First Workshop on Mobile Computing Systems and Applications Pub Date : 1994-12-08 DOI: 10.1109/WMCSA.1994.12

D. Messerschmitt, J. M. Reason, A. Lao

{"title":"Asynchronous Video Coding for Wireless Transport","authors":"D. Messerschmitt, J. M. Reason, A. Lao","doi":"10.1109/WMCSA.1994.12","DOIUrl":"https://doi.org/10.1109/WMCSA.1994.12","url":null,"abstract":"Wireless access to continuous-medis services such as video, voice, and audio is becoming increasingly prevalent. Interactive video services such as video conferencing and multimedia editing is one such service, but existing compression standards (designed for wired, circuit-switclrcd services) are unsatisfactory for wireless packet-video services. We propose a novel strategy for video transport using a layered source coder in conjunction with a variableQOS, multiple-substream abstraction for the transport. This abstraction addresses specifically the need to obtain simultaneously high spectral efficiency, good subjective quality, and low perceptual delay on awireless channel. It also addresses the heterogenous transport resulting from the concatenation of a wireless access link with a broadband backbone network. We use asynchronous video (ASV) reconstruction, running counter to current techniqucs, which use strictly synchronous (frame-by-frame ) video processing. By doing so we hope to achieve a perceptual delay that is much lower than the worst-cese tronsport delay. (By \"perceptual delay\" , we refer to the effective end-to-end latency observed by the user,for example es represented by the audio delay required to maintain lip synchronization.) By identifying packets to the transport with relaxed reliability andlor delay requirements (through the subsream identifier), the transport (particularly wireless) can achieve high traffic capacity. Reasonable and promising simulation results are achieved, although much work remains on achieving significant video compression in this environmcnt.","PeriodicalId":143500,"journal":{"name":"1994 First Workshop on Mobile Computing Systems and Applications","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132396583","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: 16

The Bayou Architecture: Support for Data Sharing Among Mobile Users Bayou架构:支持移动用户之间的数据共享

1994 First Workshop on Mobile Computing Systems and Applications Pub Date : 1994-12-08 DOI: 10.1109/WMCSA.1994.37

A. Demers, K. Petersen, M. Spreitzer, D. Terry, M. Theimer, B. Welch

引用次数: 367