NDLI: Contention-aware data caching in wireless multihop ad hoc networks

Content Provider	IEEE Xplore Digital Library
Author	Xiaopeng Fan Jiannong Cao Weigang Wu
Copyright Year	2009
Description	Author affiliation: Department of Computer Science, Sun Yat-sen University, Guangzhou, China (Weigang Wu) \|\| Department of Computing, Hong Kong Polytechnic University, Kowloon, Hong Kong (Xiaopeng Fan; Jiannong Cao)
Abstract	Data caching is one of the attractive techniques that can increase the efficiency of data access in wireless multi-hop ad hoc networks. However, it is still a challenging task to achieve an optimal trade-off between the total traffic cost and average access delay by properly selecting cache nodes, i.e. cache placement. In this paper, we address the problem of cache placement in wireless multi-hop ad hoc networks. We consider dynamic networks, in which there is a data source that stores one data item and other client nodes require accessing the data item. We define the cache placement problem on a dynamic network topology as Dynamic Cache Placement (DCP). Most of the existing cache placement algorithms use hop counts to measure the total cost of caching systems. Due to the impact of contentions in wireless networks, one hop delay is different from each other and it varies with the traffic load. Thus the previous algorithms cannot achieve their expected performance. We propose two heuristic cache placement algorithms, named Centralized Contention-Aware Caching Algorithm (CCCA) and Distributed Contention-aware Caching Algorithm (DCCA), which detect the variation of contentions to evaluate the benefit of selecting a node as cache node. Simulation results show that the proposed algorithms achieve better performance than other alternative ones in terms of average query delay, caching overheads, and query success ratio.
Starting Page	1
Ending Page	9
File Size	6427518
Page Count	9
File Format	PDF
ISBN	9781424451135
DOI	10.1109/MOBHOC.2009.5337049
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-10-12
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Costs Telecommunication traffic cache placement Ad hoc networks Delay Mobile ad hoc networks Network topology contention-aware wireless ad hoc network Spread spectrum communication Traffic control Computer networks IP networks
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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