Proceedings ArticleDOI
Energy-efficient caching for wireless mobile computing
Kung-Lung Wu,Philip S. Yu,Ming-Syan Chen +2 more
- pp 336-343
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TLDR
An energy-efficient cache invalidation method, called GCORE (Grouping with COld update-set REtention), that allows a mobile computer to operate in a disconnected mode to save the battery while still retaining most of the caching benefits after a reconnection is presented.Abstract:
Caching can reduce the bandwidth requirement in a mobile computing environment. However, due to battery power limitations, a wireless mobile computer may often be forced to operate in a doze (or even totally disconnected) mode. As a result, the mobile computer may miss some cache invalidation reports broadcast by a server, forcing it to discard the entire cache contents after waking up. In this paper, we present an energy-efficient cache invalidation method, called GCORE (Grouping with COld update-set REtention), that allows a mobile computer to operate in a disconnected mode to save the battery while still retaining most of the caching benefits after a reconnection. We present an efficient implementation of GCORE and conduct simulations to evaluate its caching effectiveness. The results show that GCORE can substantially improve mobile caching by reducing the communication bandwidth (or energy consumption) for query processing.read more
Citations
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Journal ArticleDOI
A Reprocessing Model for Complete Execution of RFID Access Operations on Tag Memory
TL;DR: This paper proposes an asynchronous reprocessing model for finalizing any incomplete execution of read/write operations to remove inconsistent states of radio frequency identification tag data and presents a concurrency control mechanism based on continuous query processing that enables the suspended tag operations to be re-executed.
Journal ArticleDOI
Efficient Mobile Client Caching Supporting Transaction Semantics
IlYoung Chung,Chong-Sun Hwang +1 more
TL;DR: The proposed protocol adopts asynchronous(non-periodic) broadcasting as the cache invalidation scheme, and supports transaction semantics in mobile environments, and can improve the throughput by reducing the abortion of transactions with low communication costs.
Journal ArticleDOI
Selective Cache Consistency Scheme to Enlarge Autonomy of Mobile Host in Mobile Computing Environments
Hee-Sook Kim,Byung-Yeon Hwang +1 more
TL;DR: A `Selective Cache Consistency Scheme` is proposed, which prevents the loss of data that occurs by a long period of disconnection, by asynchronous broadcasting and transmitting those broadcast data preserved in the server.
Book ChapterDOI
Indexing in Air
TL;DR: This chapter addresses the problem of selective data accesses in a push based data dissemination framework over asymmetric low bandwidth wireless channel with three different air indexing schemes, namely, replicated indexing, exponential indexing and indexing based on hashing.
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Investigation of cache maintenance strategies for multi-cell environments
TL;DR: In this paper, three types of cache consistency maintenance strategies involving invalidation reports (IRs) are proposed for application in mobile environments: homogeneous IR, inhomogeneous IR without roaming check, and inhomogenous IR with roaming check.
References
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Journal ArticleDOI
Mobile wireless computing: challenges in data management
Proceedings Article
Sleepers and Workaholics: Caching Strategies in Mobile Environments
Daniel Barbará,Tomasz Imielinski +1 more
TL;DR: In this paper, a taxonomy of different cache invalidation strategies and study the impact of client's disconnection times on their performance is presented, and the authors determine that for the units which are often disconnected (sleepers) the best cache invalidization strategy is based on signatures previously used for efficient file comparison.
Proceedings ArticleDOI
Sleepers and workaholics: caching strategies in mobile environments
Daniel Barbará,Tomasz Imielinski +1 more
TL;DR: A taxonomy of different cache invalidation strategies is proposed and it is determined that for the units which are often disconnected (sleepers) the best cache invalidations strategy is based on signatures previously used for efficient file comparison, and for units which is connected most of the time (workaholics), the best Cache invalidation strategy isbased on the periodic broadcast of changed data items.
Proceedings ArticleDOI
Energy efficient indexing on air
TL;DR: This work describes two methods, (1,m) Indexing and Distributed Indexing, for organizing and accessing broadcast data and demonstrates that the proposed algorithms lead to significant improvement of battery life, while retaining a low access time.
Journal ArticleDOI
Adaptation and mobility in wireless information systems
TL;DR: The author begins by discussing the background, defining key terms and showing how wireless information systems can be viewed as a natural evolution of computing's relentless march toward greater distribution and ubiquity of access.
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