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Query Management for Efficient Data Access in Wireless Environment

Seema Verma, Author Rakhee, Savita Kumari
2011 International Journal of Computer Applications  
To retrieve such broadcasted data mobile client submit a query to broadcast channel and get responded in sequential manner. Hence query plays central role in wireless communication.  ...  In such computing system server continuously broadcast data over air channel without waiting for client's response and client retrieve only the data pertaining to him.  ...  The CSM system architecture demands the minimum use of battery power so that it can be utilized for long while MC obviously needs answer of query in minimum possible time because tardy answer of query  ... 
doi:10.5120/3528-4807 fatcat:utk7fg6iyfgqvecchppzswckmy

Research in Mobile Database Query Optimization and Processing

Agustinus Borgy Waluyo, Bala Srinivasan, David Taniar
2005 Mobile Information Systems  
A caching management strategy defines a number of methods for maintaining cached data items in clients' local storage.  ...  In this scheme, several techniques to improve the query performance by broadcasting data to a population of mobile users are described.  ...  A list of cached items that have been used to answer a query at each interval is stored in the mobile client.  ... 
doi:10.1155/2005/161239 fatcat:j3qgomsqbfbj5ahpp4565u45xy

A Mixed Data Dissemination Strategy for Mobile Computing Systems [chapter]

Guohong Cao, Yiqiong Wu, Bo Li
2001 Lecture Notes in Computer Science  
In this paper, we propose to apply different techniques (broadcasting and caching) to deal with different components of the data based on their update frequency.  ...  However, if the data size is large, the broadcast cycle may be long, and hence the access delay becomes a problem.  ...  As a solution, after broadcasting the IR, the server first broadcasts the id list of the data items whose real data will be broadcasted next, and then broadcasts the data items whose ids are in the id  ... 
doi:10.1007/3-540-47714-4_37 fatcat:6ka5mgzncvfcrc34365zq233q4

On cache invalidation for internet-based vehicular ad hoc networks

Sunho Lim, Soo Hoan Chae, Chansu Yu, Chita R. Das
2008 2008 5th IEEE International Conference on Mobile Ad Hoc and Sensor Systems  
A key optimization technique in IVANETs is to cache frequently accessed data items in a local storage of vehicles.  ...  In this paper, we propose a novel cache invalidation algorithm that takes advantage of the underlying location management scheme to reduce the number of broadcast operations and the corresponding query  ...  The cost includes answering queries, broadcasting IRs, invalidating cached data items, and updating IRs.  ... 
doi:10.1109/mahss.2008.4660111 dblp:conf/mass/LimCYD08 fatcat:7oucrkzyafbihctmmtiirvtawi

Power Conserving and Access Efficient Indexes for Wireless Computing [chapter]

Dik Lun Lee, Qinglong Hu, Wang-Chien Lee
2000 Information Organization and Databases  
Moreover, we introduce two access efficient indexing methods, cache schedule and integrated signature, for a wireless data dissemination system that incorporates both of broadcast and on-demand services  ...  Among them, hybrid index is the best choice for improving power efficiency under both scenarios of single and multiple attributes based queries.  ...  Due to data frame duplication, queries other than that attribute may take longer to answer. Therefore, broadcast disks are not efficient for data files with multiple attributes.  ... 
doi:10.1007/978-1-4615-1379-7_18 fatcat:3dqlxlgggzgqrpkvirrlsu7p3e

Efficient windows query processing with expanded grid cells on wireless spatial data broadcasting for pervasive computing

Seokjin Im, Kilhong Joo, Jintak Choi
2014 Contemporary Engineerng Sciences  
The SIEC is organized with expanded cells of a regular grid partition for spatial data items, allows mobile clients to quickly access the queried data items by lowering the number of grid cells the clients  ...  To support location aware information services efficiently, we propose a spatial index based on expanded grid cells, named SIEC, aiming at spatial data broadcasting on air.  ...  This research was supported by the Incheon National University (International Cooperative) Research Grant in 2013  ... 
doi:10.12988/ces.2014.4691 fatcat:vzj2jqczxrc37prtkalvpjc4he

Cooperative Cache Invalidation Strategies for Internet-Based Vehicular Ad Hoc Networks

Sunho Lim, Chansu Yu, Chita R. Das
2009 2009 Proceedings of 18th International Conference on Computer Communications and Networks  
A key design optimization technique in IVANETs is to cache the frequently accessed data items in a local storage of vehicles.  ...  on system performance, and communication overhead.  ...  In ETS, a stateless server broadcasts an IR to every cell in the system whenever vehicles cache an updated data item.  ... 
doi:10.1109/icccn.2009.5235305 dblp:conf/icccn/LimYD09 fatcat:trdp74hvmvdl5ly3mmmspkjpxm

Efficient Processing of XPath Queries with Structured Overlay Networks [chapter]

Gleb Skobeltsyn, Manfred Hauswirth, Karl Aberer
2005 Lecture Notes in Computer Science  
In this paper we present a first solution for efficiently supporting structured queries, more specifically, XPath queries, in structured P2P systems.  ...  Structured P2P systems are an efficient alternative as they typically offer logarithmic search complexity in the number of peers.  ...  We envision that the presented solution can be used in a P2P XML querying engine for answering structural (sub)queries.  ... 
doi:10.1007/11575801_20 fatcat:i6q2wdwwjjdt3kpykyjyowevl4

An Index Based on Irregular Identifier Space Partition for Quick Multiple Data Access in Wireless Data Broadcasting

SeokJin IM, HeeJoung HWANG
2016 IEICE transactions on information and systems  
Our performance evaluation shows that with respect to access time, the proposed IIP outperforms the existing index schemes supporting multiple data access. key words: wireless data broadcast system, air  ...  items on a wireless broadcast channel.  ...  In the system, a broadcast server periodically disseminates data items, such as stock market data, over a wireless channel in buckets, the smallest logical broadcasting unit.  ... 
doi:10.1587/transinf.2016edl8091 fatcat:cnuu6nkzzvdehn4hsuihavus5a

Cache invalidation strategies for Internet-based vehicular ad hoc networks

Sunho Lim, Chansu Yu, Chita R. Das
2012 Computer Communications  
A key design optimization technique in IVANETs is to cache the frequently accessed data items in a local storage of vehicles.  ...  Rather, an important design issue is how to keep the cached copies valid when the original data items are updated. This is essential to provide fast access to valid data for fast moving vehicles.  ...  In ETS, a stateless server broadcasts an IR to every cell in the system whenever vehicles cache an updated data item.  ... 
doi:10.1016/j.comcom.2011.10.013 fatcat:of73mynwjnckdkptp4hl4eepum

A scalable low-latency cache invalidation strategy for mobile environments

Gyohong Cao
2000 Proceedings of the 6th annual international conference on Mobile computing and networking - MobiCom '00  
Caching frequently accessed data items on the client side is an effective technique for improving performance in a mobile environment.  ...  Second, when the server updates a hot data item, all clients have to query the server and get the data from the server separately, which wastes a large amount of bandwidth.  ...  In each query, the client may need to access multiple data items and then it may send a request to the server to ask for multiple data items.  ... 
doi:10.1145/345910.345945 dblp:conf/mobicom/Cao00 fatcat:s2ou7ukqwfbtzhcaqjthmmhchq

A scalable low-latency cache invalidation strategy for mobile environments

Guohong Cao
2003 IEEE Transactions on Knowledge and Data Engineering  
Caching frequently accessed data items on the client side is an effective technique for improving performance in a mobile environment.  ...  Second, when the server updates a hot data item, all clients have to query the server and get the data from the server separately, which wastes a large amount of bandwidth.  ...  In each query, the client may need to access multiple data items and then it may send a request to the server to ask for multiple data items.  ... 
doi:10.1109/tkde.2003.1232276 fatcat:qidxl55j4nebhcqibxazx3xwxm

Proactive power-aware cache management for mobile computing systems

Guohong Cao
2002 IEEE transactions on computers  
Instead of passively waiting, the clients intelligently prefetch the data that are most likely used in the future.  ...  However, the IR-based cache invalidation solution has some limitations, such as long query delay, low bandwidth utilization, and it is not suitable for applications where data change frequently.  ...  When a client receives a query between iÀIYI and iÀIYP , it cannot answer the query until i in the IR-based approach, but it can answer the query at iÀIYP in the UIR-based approach.  ... 
doi:10.1109/tc.2002.1009147 fatcat:obn7q5ikczhj7k6jdfhrtjjgwu

Applying multiple query optimization in mobile databases

R. Malladi, K.C. Davis
2003 36th Annual Hawaii International Conference on System Sciences, 2003. Proceedings of the  
We apply multiple query optimization to batches of pull (on-demand) requests in a mobile database system.  ...  The resulting view can answer several queries at once, and it is broadcast on a view channel dedicated to common answers of multiple queries rather than over individual downlink channels.  ...  of Q2), and the answer to Q4 does not have any data in common with any other query answers.  ... 
doi:10.1109/hicss.2003.1174836 dblp:conf/hicss/MalladiD03 fatcat:m4xwjmmcivcolewbbn2gslpzzm

Cache invalidation strategies for internet-based mobile ad hoc networks

Sunho Lim, Wang-Chien Lee, Guohong Cao, Chita R. Das
2007 Computer Communications  
Although caching frequently accessed data items in mobile terminals (MTs) improves the communication performance in an IMANET, it brings a critical design issue when data updates.  ...  Then, we propose a pull-based approach, called aggregate cache based on demand (ACOD) scheme that uses an efficient search algorithm for finding the queried data items.  ...  Wang-Chien Lee is supported in part by NSF Grants IIS-0328881, IIS-0534343, CNS-0626709. Preliminary results of this paper have been presented in part at IEEE MASS 2004 [22] .  ... 
doi:10.1016/j.comcom.2007.02.020 fatcat:yhlkyramdnh3xjysoflufsd4ly
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