Results 1 - 10 of 404

TOSSIM: Accurate and Scalable Simulation of Entire TinyOS Applications

by Philip Levis, Nelson Lee, Matt Welsh, David Culler , 2003
"... Accurate and scalable simulation has historically been a key enabling factor for systems research. We present TOSSIM, a simulator for TinyOS wireless sensor networks. By exploiting the sensor network domain and TinyOS’s design, TOSSIM can capture network behavior at a high fidelity while scaling to ..."
Abstract - Cited by 784 (19 self) - Add to MetaCart
to thousands of nodes. By using a probabilistic bit error model for the network, TOSSIM remains simple and efficient, but expressive enough to capture a wide range of network interactions. Using TOSSIM, we have discovered several bugs in TinyOS, ranging from network bitlevel MAC interactions to queue overflows

Capacity of Ad Hoc Wireless Networks

by Jinyang Li, Charles Blake, Douglas S. J. De Couto, Hu Imm Lee, Robert Morris
"... Early simulation experience with wireless ad hoc networks suggests that their capacity can be surprisingly low, due to the requirement that nodes forward each others’ packets. The achievable capacity depends on network size, traffic patterns, and detailed local radio interactions. This paper examine ..."
Abstract - Cited by 636 (14 self) - Add to MetaCart
examines these factors alone and in combination, using simulation and analysis from first principles. Our results include both specific constants and general scaling relationships helpful in understanding the limitations of wireless ad hoc networks. We examine interactions of the 802.11 MAC and ad hoc

Performance comparison of two on-demand routing protocols for ad hoc networks

by Samir R. Das, Charles E. Perkins , Elizabeth M. Royer , 2000
"... Ad hoc networks are characterized by multihop wireless connectivity, frequently changing network topology and the need for efficient dynamic routing protocols. We compare the performance of two prominent ondemand routing protocols for mobile ad hoc networks — Dynamic Source Routing (DSR) and Ad Ho ..."
Abstract - Cited by 554 (21 self) - Add to MetaCart
Hoc On-Demand Distance Vector Routing (AODV). A detailed simulation model with MAC and physical layer models is used to study interlayer interactions and their performance implications. We demonstrate that even though DSR and AODV share a similar on-demand behavior, the differences in the protocol

Link-level Measurements from an 802.11b Mesh Network

by Daniel Aguayo, John Bicket, Sanjit Biswas, Glenn Judd, Robert Morris - In SIGCOMM , 2004
"... This paper anal yzes the causes of packetl oss in a 38-node urban mul ti-hop 802.11b network. The patterns and causes oflv# are important in the design of routing and errorcorrection proto colv as wel as in networkplqq"(v The paper makes the fol l owing observations. The distribution of inter-n ..."
Abstract - Cited by 567 (11 self) - Add to MetaCart
of this paper are an understanding of their rel ative importance, of how they interact, and of the impl ications for MAC and routing protocol design.

Performance Comparison of Two On-demand Routing protocols for Ad Hoc Networks

by Charles Perkins, Charles E. Perkins Nokia, Elizabeth M. Royer, Samir R. Das, Mahesh K. Marina , 2001
"... Ad hoc networks are characterized by multihop wireless connectivity, frequently changing network topology and the need for efficient dynamic routing protocols. We compare the performance of two prominent on-demand routing protocols for mobile ad hoc networks: Dynamic Source Routing (DSR) and Ad Hoc ..."
Abstract - Cited by 255 (1 self) - Add to MetaCart
On-Demand Distance Vector Routing (AODV). A detailed simulation model with MAC and physical layer models is used to study interlayer interactions and their performance implications. We demonstrate that even though DSR and AODV share similar ondemand behavior, the differences in the protocol mechanics

Mitigating congestion in wireless sensor networks

by Bret Hull, Kyle Jamieson, Hari Balakrishnan - in SenSys , 2004
"... Network congestion occurs when offered traffic load exceeds available capacity at any point in a network. In wireless sensor networks, congestion causes overall channel quality to degrade and loss rates to rise, leads to buffer drops and increased delays (as in wired networks), and tends to be gross ..."
Abstract - Cited by 192 (3 self) - Add to MetaCart
transit traffic is present, and a prioritized medium access control (MAC) protocol. We implement these techniques and present experimental results from a 55-node in-building wireless sensor network. We demonstrate that the combination of these techniques, Fusion, can improve network efficiency by a factor

TCP Performance in Wireless Multi-hop Networks

by Mario Gerla, Ken Tang, Rajive Bagrodia , 1999
"... In this study we investigate the interaction between TCP and MAC layer in a wireless multi-hop network. Using simulation, we provide new insight into two critical problems of TCP over wireless multi-hop. The first is the conflict between TCP data packets and TCP ACKs, which causes performance to deg ..."
Abstract - Cited by 114 (9 self) - Add to MetaCart
In this study we investigate the interaction between TCP and MAC layer in a wireless multi-hop network. Using simulation, we provide new insight into two critical problems of TCP over wireless multi-hop. The first is the conflict between TCP data packets and TCP ACKs, which causes performance

Characterizing the Interaction Between Routing and MAC Protocols in Ad-hoc Networks

by Chris Barrett, Christopher L. Barrett, Martin Drozda, Martin Drozda, Achla Marathe, Achla Marathe, Madhav Marathe, Madhav V. Marathe - In Proceedings of the ACM International Symposium on Mobile Ad Hoc Networking and Computing , 2003
"... We empirically study the effect of mobility and interaction between various input parameters on the performance of protocols designed for wireless ad-hoc networks. An important objective is to study the interaction of the routing and MAC layer protocols under different mobility parameters. We use th ..."
Abstract - Cited by 41 (5 self) - Add to MetaCart
We empirically study the effect of mobility and interaction between various input parameters on the performance of protocols designed for wireless ad-hoc networks. An important objective is to study the interaction of the routing and MAC layer protocols under different mobility parameters. We use

Joint Congestion Control and Media Access Control Design for Ad Hoc Wireless Networks

by Lijun Chen, Steven H. Low, John C. Doyle - In Proc. IEEE INFOCOM , 2005
"... Abstract—We present a model for the joint design of congestion control and media access control (MAC) for ad hoc wireless networks. Using contention graph and contention matrix, we formulate resource allocation in the network as a utility maximization problem with constraints that arise from content ..."
Abstract - Cited by 120 (4 self) - Add to MetaCart
Abstract—We present a model for the joint design of congestion control and media access control (MAC) for ad hoc wireless networks. Using contention graph and contention matrix, we formulate resource allocation in the network as a utility maximization problem with constraints that arise from

Distributed cooperative MAC for multi-hop wireless networks

by Hangguan Shan , Weihua Zhuang , Zongxin Wang - IEEE Commun. Mag , 2009
"... Abstract: This article investigates distributed cooperative medium access control (MAC) protocol design for multi-hop wireless networks. Cooperative communication has been proposed recently as an effective way to mitigate channel impairments. With cooperation, single-antenna mobile terminals in ..."
Abstract - Cited by 35 (8 self) - Add to MetaCart
Abstract: This article investigates distributed cooperative medium access control (MAC) protocol design for multi-hop wireless networks. Cooperative communication has been proposed recently as an effective way to mitigate channel impairments. With cooperation, single-antenna mobile terminals
Results 1 - 10 of 404