Results 1 - 10 of 492

Versatile Low Power Media Access for Wireless Sensor Networks

by Joseph Polastre, Jason Hill, David Culler , 2004
"... We propose B-MAC, a carrier sense media access protocol for wireless sensor networks that provides a flexible interface to obtain ultra low power operation, effective collision avoidance, and high channel utilization. To achieve low power operation, B-MAC employs an adaptive preamble sampling scheme ..."
Abstract - Cited by 1099 (19 self) - Add to MetaCart
We propose B-MAC, a carrier sense media access protocol for wireless sensor networks that provides a flexible interface to obtain ultra low power operation, effective collision avoidance, and high channel utilization. To achieve low power operation, B-MAC employs an adaptive preamble sampling

Using occupancy grids for mobile robot perception and navigation

by Albert Elfes - Computer , 1989
"... o widen the range of application and deployment of robots, both in research and in industrial contexts, we need to develop more powerful and flexible robotic systems exhibiting higher degrees of autonomy and able to sense, plan, and operate in unstructured environments. For that, the robot must be a ..."
Abstract - Cited by 438 (4 self) - Add to MetaCart
o widen the range of application and deployment of robots, both in research and in industrial contexts, we need to develop more powerful and flexible robotic systems exhibiting higher degrees of autonomy and able to sense, plan, and operate in unstructured environments. For that, the robot must

Power Efficient Organization of Wireless Sensor Networks

by Sasa Slijepcevic, Miodrag Potkonjak , 2001
"... Abstract-- Wireless sensor networks have emerged recently as an effective way of monitoring remote or inhospitable physical environments. One of the major challenges in devising such networks lies in the constrained energy and computational resources available to sensor nodes. These constraints must ..."
Abstract - Cited by 261 (7 self) - Add to MetaCart
must be taken into account at all levels of system hierarchy. The deployment of sensor nodes is the first step in establishing a sensor network. Since sensor networks contain a large number of sensor nodes, the nodes must be deployed in clusters, where the location of each particular node cannot

Locating the Nodes -- Cooperative localization in wireless sensor networks

by Neal Patwari, Joshua N. Ash, Spyros Kyperountas, Alfred O. Hero III, Randolph L. Moses, et al. , 2005
"... Accurate and low-cost sensor localization is a critical requirement for the deployment of wireless sensor networks in a wide variety of applications. Low-power wireless sensors may be many hops away from any other sensors with a priori location information. In cooperative localization, sensors work ..."
Abstract - Cited by 305 (12 self) - Add to MetaCart
Accurate and low-cost sensor localization is a critical requirement for the deployment of wireless sensor networks in a wide variety of applications. Low-power wireless sensors may be many hops away from any other sensors with a priori location information. In cooperative localization, sensors work

CodeBlue: An ad hoc sensor network infrastructure for emergency medical care

by David Malan, Thaddeus Fulford-jones, Matt Welsh, Steve Moulton - In International Workshop on Wearable and Implantable Body Sensor Networks , 2004
"... Sensor devices integrating embedded processors, low-power, lowbandwidth radios, and a modest amount of storage have the potential to enhance emergency medical care. Wearable vital sign sensors can track patient status and location, while simultaneously operating as active tags. We introduce CodeBlue ..."
Abstract - Cited by 222 (6 self) - Add to MetaCart
Blue, a wireless infrastructure intended for deployment in emergency medical care, integrating low-power, wireless vital sign sensors, PDAs, and PC-class systems. CodeBlue will enhance first responders ’ ability to assess patients on scene, ensure seamless transfer of data among caregivers, and facilitate

Data Gathering Algorithms in Sensor Networks Using Energy Metrics

by Stephanie Lindsey, Cauligi Raghavendra, Krishna M. Sivalingam - IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS , 2002
"... Sensor webs consisting of nodes with limited battery power and wireless communications are deployed to collect useful information from the field. Gathering sensed information in an energy efficient manner is critical to operating the sensor network for a long period of time. In [12], a data collecti ..."
Abstract - Cited by 226 (2 self) - Add to MetaCart
Sensor webs consisting of nodes with limited battery power and wireless communications are deployed to collect useful information from the field. Gathering sensed information in an energy efficient manner is critical to operating the sensor network for a long period of time. In [12], a data

Trio: Enabling Sustainable and Scalable Outdoor Wireless Sensor Network Deployments

by Prabal Dutta, Jonathan Hui, Jaein Jeong, Sukun Kim, Cory Sharp, Jay Taneja, Gilman Tolle, Kamin Whitehouse, David Culler - in IPSN’06 , 2006
"... We present the philosophy, design, and initial evaluation of the Trio Testbed, a new outdoor sensor network deployment that consists of 557 solar-powered motes, seven gateway nodes, and a root server. The testbed covers an area of approximately 50,000 square meters and was in continuous operation du ..."
Abstract - Cited by 97 (11 self) - Add to MetaCart
We present the philosophy, design, and initial evaluation of the Trio Testbed, a new outdoor sensor network deployment that consists of 557 solar-powered motes, seven gateway nodes, and a root server. The testbed covers an area of approximately 50,000 square meters and was in continuous operation

Power efficient data gathering and aggregation in wireless sensor networks

by Hüseyin Özgür Tan - SIGMOD Record , 2003
"... Abstract — Recent developments in processor, memory and radio technology have enabled wireless sensor networks which are deployed to collect useful information from an area of interest. The sensed data must be gathered and transmitted to a base station where it is further processed for end-user quer ..."
Abstract - Cited by 63 (2 self) - Add to MetaCart
PEDAP (Power Efficient Data gathering and Aggregation Protocol), which are near optimal minimum spanning tree based routing schemes, where one of them is the power-aware version of the other. Our simulation results show that our algorithms perform well both in systems where base station is far away from

Message ferrying: Proactive routing in highly-partitioned wireless ad hoc networks

by Wenrui Zhao, Mostafa H. Ammar , 2003
"... An ad hoc network allows devices with wireless interfaces to communicate with each other without any preinstalled infrastructure. Due to node mobility, limited radio power, node failure and wide deployment area, ad hoc networks are often vulnerable to network partitioning. A number of examples are i ..."
Abstract - Cited by 120 (5 self) - Add to MetaCart
An ad hoc network allows devices with wireless interfaces to communicate with each other without any preinstalled infrastructure. Due to node mobility, limited radio power, node failure and wide deployment area, ad hoc networks are often vulnerable to network partitioning. A number of examples

Deploying an Efficient Safety

by Ghassan Samara, Mohammad Rasmi
"... Abstract — The rapid development of wireless communication networks in recent years has made vehicle to vehicle (V2V) and vehicle to infrastructure (V2I) communications possible in mobile ad hoc networks (MANETs). It has also led to the development of a new technology called vehicular ad hoc network ..."
Abstract - Add to MetaCart
of emergency messages to warn other vehicles to avoid the danger. The intent of the research is to propose an efficient safety system for VANET by designing communication protocols and techniques to provide the means for successful transmission of safety-related information. Therefore, three protocols based
Results 1 - 10 of 492