Results 1 - 10 of 3,106

Evaluation of Release Consistent Software Distributed Shared Memory on Emerging Network Technology

by Sandhya Dwarkadas, Pete Keleher, Alan L. Cox, Willy Zwaenepoel
"... We evaluate the effect of processor speed, network characteristics, and software overhead on the performance of release-consistent software distributed shared memory. We examine five different protocols for implementing release consistency: eager update, eager invalidate, lazy update, lazy invalidat ..."
Abstract - Cited by 467 (43 self) - Add to MetaCart
invalidate, and a new protocol called lazy hybrid. This lazy hybrid protocol combines the benefits of both lazy update and lazy invalidate. Our simulations indicate that with the processors and networks that are becoming available, coarse-grained applications such as Jacobi and TSP perform well, more or less

HEED: A Hybrid, Energy-Efficient, Distributed Clustering Approach for Ad Hoc Sensor Networks

by Ossama Younis, Sonia Fahmy - IEEE TRANS. MOBILE COMPUTING , 2004
"... Topology control in a sensor network balances load on sensor nodes and increases network scalability and lifetime. Clustering sensor nodes is an effective topology control approach. In this paper, we propose a novel distributed clustering approach for long-lived ad hoc sensor networks. Our proposed ..."
Abstract - Cited by 590 (1 self) - Add to MetaCart
proposed approach does not make any assumptions about the presence of infrastructure or about node capabilities, other than the availability of multiple power levels in sensor nodes. We present a protocol, HEED (Hybrid Energy-Efficient Distributed clustering), that periodically selects cluster heads

The Performance of Query Control Schemes for the Zone Routing Protocol

by Zygmunt J. Haas, Senior Member, Marc R. Pearlman , 2001
"... In this paper, we study the performance of route query control mechanisms for the Zone Routing Protocol (ZRP) for ad hoc networks. ZRP proactively maintains routing information for a local neighborhood (routing zone), while reactively acquiring routes to destinations beyond the routing zone. This hy ..."
Abstract - Cited by 325 (15 self) - Add to MetaCart
In this paper, we study the performance of route query control mechanisms for the Zone Routing Protocol (ZRP) for ad hoc networks. ZRP proactively maintains routing information for a local neighborhood (routing zone), while reactively acquiring routes to destinations beyond the routing zone

A new routing protocol for reconfigurable wireless networks

by Zygmunt J Haas - Proceedings of the IEEE International Conference on Universal Personal Communications (ICUPC , 1997
"... ABSTRACT: In this paper, we propose a new routing protocol, the Zone Routing Protocol (ZRP), for the Reconfigurable Wireless Networks, a large scale, highly mobile ad-hoc networking environment. The novelty of the ZRP protocol is that it is applicable to large Plat-routed networks. Furthermore, thr ..."
Abstract - Cited by 318 (5 self) - Add to MetaCart
, through the use of the zone radius parameter, the scheme exhibits adjustable hybrid behavior of proactive and reactive routing schemes. We evaluate the performance of the protocol, showing the reduction in the number of control messages, as compared with other reactive schemes, such as flooding.

vic: A Flexible Framework for Packet Video

by Steven Mccanne, Van Jacobson - ACM Multimedia , 1995
"... The deployment of IP Multicast has fostered the development of a suite of applications, collectively known as the MBone tools, for real-time multimedia conferencingover the Internet. Two of these tools --- nv from Xerox PARC and ivs from INRIA --- provide video transmission using softwarebased codec ..."
Abstract - Cited by 369 (18 self) - Add to MetaCart
, and support for diverse compression algorithms. We also propose a novel compression scheme called "IntraH. 261". Created as a hybrid of the nv and ivs codecs, IntraH. 261 provides a factor of 2-3 improvement in compression gain over the nv encoder (6 dB of PSNR) as well as a substantial improvement

Distributed Clustering in Ad-hoc Sensor Networks: A Hybrid, Energy-Efficient Approach

by Ossama Younis, Sonia Fahmy , 2004
"... Prolonged network lifetime, scalability, and load balancing are important requirements for many ad-hoc sensor network applications. Clustering sensor nodes is an effective technique for achieving these goals. In this work, we propose a new energy-efficient approach for clustering nodes in adhoc sens ..."
Abstract - Cited by 307 (12 self) - Add to MetaCart
sensor networks. Based on this approach, we present a protocol, HEED (Hybrid Energy-Efficient Distributed clustering), that periodically selects cluster heads according to a hybrid of their residual energy and a secondary parameter, such as node proximity to its neighbors or node degree. HEED does

Z-MAC: a Hybrid MAC for Wireless Sensor Networks

by Ajit Warrier, Jeongki Min, Injong Rhee , 2005
"... Z-MAC is a hybrid MAC protocol for wireless sensor networks. It combines the strengths of TDMA and CSMA while offsetting their weaknesses. Nodes are assigned time slots using a distributed implementation of RAND. Unlike TDMA where a node is allowed to transmit only during its own assigned slots, a n ..."
Abstract - Cited by 296 (7 self) - Add to MetaCart
Z-MAC is a hybrid MAC protocol for wireless sensor networks. It combines the strengths of TDMA and CSMA while offsetting their weaknesses. Nodes are assigned time slots using a distributed implementation of RAND. Unlike TDMA where a node is allowed to transmit only during its own assigned slots, a

Design and Verification of Lazy and Hybrid Implementations of the SELF Protocol

by Eliyah Kilada , Kenneth S Stevens
"... Abstract. Synchronous Elasticization converts an ordinary clocked circuit into Latency-Insensitive (LI) design. The Synchronous Elastic Flow (SELF) is an LI protocol that can be implemented with eager or lazy evaluation in the data steering network. Compared to lazy implementations, eager SELF desi ..."
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designs have no combinational cycles and can have a performance advantage, but consume more area and power. The design space of lazy SELF protocols is evaluated and verified. Several new designs are mapped to hybrid eager/lazy implementations that retain the performance advantage of the eager design

Stability of Networked Control Systems

by Wei Zhang, Michael S. Branicky, Stephen M. Phillips - IEEE Control Systems Magazine , 2001
"... This article is organized as follows. First, we review some previous work on NCSs and offer some improvements. Then, we summarize the fundamental issues in NCSs and examine them with different underlying network-scheduling protocols. We present NCS models with network-induced delay and analyze their ..."
Abstract - Cited by 315 (8 self) - Add to MetaCart
This article is organized as follows. First, we review some previous work on NCSs and offer some improvements. Then, we summarize the fundamental issues in NCSs and examine them with different underlying network-scheduling protocols. We present NCS models with network-induced delay and analyze

Logtm: Log-based transactional memory

by Kevin E. Moore, Jayaram Bobba, Michelle J. Moravan, Mark D. Hill, David A. Wood - in HPCA , 2006
"... Transactional memory (TM) simplifies parallel programming by guaranteeing that transactions appear to execute atomically and in isolation. Implementing these properties includes providing data version management for the simultaneous storage of both new (visible if the transaction commits) and old (r ..."
Abstract - Cited by 282 (11 self) - Add to MetaCart
of transactional memory, Log-based Transactional Memory (LogTM), that makes commits fast by storing old values to a per-thread log in cacheable virtual memory and storing new values in place. LogTM makes two additional contributions. First, LogTM extends a MOESI directory protocol to enable both fast conflict
Results 1 - 10 of 3,106