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Geographic Adaptive Fidelity and Geographic Energy Aware Routing in Ad Hoc Routing

by Sinchan Roychowdhury, Chiranjib Patra - in the 2010 International Conference (ACCTA , 2010
"... Abstract — Location based routing protocols are the kinds of routing protocols, which use of nodes ’ location information, instead of links ’ information for routing. They are also known as position based routing. In position based routing protocols, it is supposed that the packet source node has po ..."
Abstract - Cited by 6 (0 self) - Add to MetaCart
also look into two popular location-based protocols: Geographic

Geography-informed Energy Conservation for Ad Hoc Routing

by Ya Xu, John Heidemann, Deborah Estrin - ACM MOBICOM , 2001
"... We introduce a geographical adaptive fidelity (GAF) algorithm that reduces energy consumption in ad hoc wireless networks. GAF conserves energy by identifying nodes that are equivalent from a routing perspective and then turning off unnecessary nodes, keeping a constant level of routing fidelity. GA ..."
Abstract - Cited by 1045 (21 self) - Add to MetaCart
We introduce a geographical adaptive fidelity (GAF) algorithm that reduces energy consumption in ad hoc wireless networks. GAF conserves energy by identifying nodes that are equivalent from a routing perspective and then turning off unnecessary nodes, keeping a constant level of routing fidelity

Overview of the scalable video coding extension of the H.264/AVC standard

by Heiko Schwarz, Detlev Marpe, Thomas Wiegand - IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY IN CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY , 2007
"... With the introduction of the H.264/AVC video coding standard, significant improvements have recently been demonstrated in video compression capability. The Joint Video Team of the ITU-T VCEG and the ISO/IEC MPEG has now also standardized a Scalable Video Coding (SVC) extension of the H.264/AVC stand ..."
Abstract - Cited by 522 (6 self) - Add to MetaCart
standard. SVC enables the transmission and decoding of partial bit streams to provide video services with lower temporal or spatial resolutions or reduced fidelity while retaining a reconstruction quality that is high relative to the rate of the partial bit streams. Hence, SVC provides functionalities

Grid Information Services for Distributed Resource Sharing

by Karl Czajkowski , Steven Fitzgerald, Ian Foster, Carl Kesselman , 2001
"... Grid technologies enable large-scale sharing of resources within formal or informal consortia of individuals and/or institutions: what are sometimes called virtual organizations. In these settings, the discovery, characterization, and monitoring of resources, services, and computations are challengi ..."
Abstract - Cited by 712 (52 self) - Add to MetaCart
are challenging problems due to the considerable diversity, large numbers, dynamic behavior, and geographical distribution of the entities in which a user might be interested. Consequently, information services are a vital part of any Grid software infrastructure, providing fundamental mechanisms for discovery

Locally Adaptive Dimensionality Reduction for Indexing Large Time Series Databases

by Kaushik Chakrabarti, Eamonn Keogh, Sharad Mehrotra, Michael Pazzani - In proceedings of ACM SIGMOD Conference on Management of Data , 2002
"... Similarity search in large time series databases has attracted much research interest recently. It is a difficult problem because of the typically high dimensionality of the data.. The most promising solutions' involve performing dimensionality reduction on the data, then indexing the reduced d ..."
Abstract - Cited by 316 (33 self) - Add to MetaCart
which we call Adaptive Piecewise Constant Approximation (APCA). While previous techniques (e.g., SVD, DFT and DWT) choose a common representation for all the items in the database that minimizes the global reconstruction error, APCA approximates each time series by a set of constant value segments

Gossip-based aggregation in large dynamic networks

by Márk Jelasity, Alberto Montresor, Ozalp Babaoglu - ACM TRANS. COMPUT. SYST , 2005
"... As computer networks increase in size, become more heterogeneous and span greater geographic distances, applications must be designed to cope with the very large scale, poor reliability, and often, with the extreme dynamism of the underlying network. Aggregation is a key functional building block fo ..."
Abstract - Cited by 271 (43 self) - Add to MetaCart
As computer networks increase in size, become more heterogeneous and span greater geographic distances, applications must be designed to cope with the very large scale, poor reliability, and often, with the extreme dynamism of the underlying network. Aggregation is a key functional building block

Hierarchical Low Power Consumption Technique with Location Information for Sensor Networks

by Susumu Matsumae, Fukuhito Ooshita
"... Abstract—In the wireless sensor networks composed of battery-powered sensor nodes, one of the main issues is how to save power consumption at each node. The usual approach to this problem is to activate only necessary nodes (e.g., those nodes which compose a backbone network), and to put other nodes ..."
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nodes to sleep. One such algorithm using location information is GAF (Geographical Adaptive Fidelity), and the GAF is enhanced to HGAF (Hierarchical Geographical Adaptive Fidelity). In this paper, we show that we can further improve the energy efficiency of HGAF by modifying the manner of dividing

Topology Control Protocols to Conserve Energy in Wireless Ad Hoc Networks

by Ya Xu, Solomon Bien, Yutaka Mori, John Heidemann, Deborah Estrin , 2003
"... In wireless ad hoc networks and sensor networks, energy use is in many cases the most important constraint since it corresponds directly to operational lifetime. This paper presents two topology control protocols that extend the lifetime of dense ad hoc networks while preserving connectivity, the ab ..."
Abstract - Cited by 81 (3 self) - Add to MetaCart
, the ability for nodes to reach each other. Our protocols conserve energy by identifying redundant nodes and turning their radios off. Geographic Adaptive Fidelity (GAF) identifies redundant nodes by their physical location and a conservative estimate of radio range. Cluster-based Energy Conservation (CEC

An Aloha protocol for multi-hop mobile wireless networks

by François Baccelli, Bartłomiej Błaszczyszyn, Paul Mühlethaler - IEEE Trans. Inf. Theory , 2006
"... Abstract—An Aloha-type access control mechanism for large mobile, multihop, wireless networks is defined and analyzed. This access scheme is designed for the multihop context, where it is important to find a compromise between the spatial density of communications and the range of each transmission. ..."
Abstract - Cited by 225 (24 self) - Add to MetaCart
. First, it can be implemented in a decentralized way provided some local geographic information is available to the mobiles. In addition, its transport capacity is proportional to the square root of the density of mobiles which is the upper bound of Gupta and Kumar. Finally, this protocol is self-adapting

Recommended Paper HGAF: A Power Saving Scheme for Wireless Sensor Networks

by Tokuya Inagaki, Susumu Ishihara
"... The sensor nodes of wireless sensor networks are placed in observation areas and transmit data to the observer by using multi-hop communication between nodes. Because these nodes are small and have a limited power supply, they must save power in order to prolong the network’s lifetime. We propose HG ..."
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HGAF (Hierarchical Geographic Adaptive Fidelity) to give a layered structure to GAF (Geographic Adaptive Fidelity), a power saving technique using location information in sensor networks. Simulation results reveal that HGAF outperforms GAF in terms of the number of survived nodes and packet delivery
Results 1 - 10 of 3,344