Results 1 - 10 of 2,149

A POST-DISASTER MOBILITY MODEL FOR DELAY TOLERANT NETWORKING

by Md Yusuf, S. Uddin, David M. Nicol, Tarek F. Abdelzaher, Robin H. Kravets
"... Delay Tolerant Networking (DTN) considers how to provide communication in contexts where it is unreasonable to assume end-to-end connectivity. Network devices exchange buffered messages when they come into communication range; messages may be buffered and carried physically several times before ulti ..."
Abstract - Cited by 4 (0 self) - Add to MetaCart
provided in simulators lack characteristics one expects in post-disaster communication. We propose a mobility model that includes the impact of the disaster on the transportation network, and that models population and relief vehicle movement. We augment the “Opportunistic Network Environment ” (ONE

A Delay-Tolerant Network Architecture for Challenged Internets

by Kevin Fall , 2003
"... The highly successful architecture and protocols of today’s Internet may operate poorly in environments characterized by very long delay paths and frequent network partitions. These problems are exacerbated by end nodes with limited power or memory resources. Often deployed in mobile and extreme env ..."
Abstract - Cited by 953 (12 self) - Add to MetaCart
The highly successful architecture and protocols of today’s Internet may operate poorly in environments characterized by very long delay paths and frequent network partitions. These problems are exacerbated by end nodes with limited power or memory resources. Often deployed in mobile and extreme

Mobility increases the capacity of ad-hoc wireless networks

by Matthias Grossglauser, David Tse - IEEE/ACM TRANSACTIONS ON NETWORKING , 2002
"... The capacity of ad-hoc wireless networks is constrained by the mutual interference of concurrent transmissions between nodes. We study a model of an ad-hoc network where n nodes communicate in random source-destination pairs. These nodes are assumed to be mobile. We examine the per-session throughpu ..."
Abstract - Cited by 1220 (5 self) - Add to MetaCart
The capacity of ad-hoc wireless networks is constrained by the mutual interference of concurrent transmissions between nodes. We study a model of an ad-hoc network where n nodes communicate in random source-destination pairs. These nodes are assumed to be mobile. We examine the per

Topology Control of Multihop Wireless Networks using Transmit Power Adjustment

by Ram Ramanathan , Regina Rosales-hain , 2000
"... We consider the problem of adjusting the transmit powers of nodes in a multihop wireless network (also called an ad hoc network) to create a desired topology. We formulate it as a constrained optimization problem with two constraints- connectivity and biconnectivity, and one optimization objective- ..."
Abstract - Cited by 688 (3 self) - Add to MetaCart
minimum power. We analyze the throughput, delay, and power consumption of our algorithms using a prototype software implementation, an emulation of a power-controllable radio, and a detailed channel model. Our results show that the performance of multihop wireless networks in practice can be substantially

Routing In Clustered Multihop, Mobile Wireless Networks With Fading Channel

by Ching-chuan Chiang, Hsiao-kuang Wu, Winston Liu, Mario Gerla , 2005
"... A clusterhead-token infrastructure for multihop, mobile wireless networks has been designed. Traditional routing algorithms in wireline networks are not feasible for mobile wireless environment due to the dynamic change in link connectivity. To gain better performance for clustered multihop, mobile ..."
Abstract - Cited by 368 (9 self) - Add to MetaCart
wireless networks, routing must take into account radio channel access, code scheduling, and channel reservation. In this paper, we propose some heuristic routing schemes for clustered multihop, mobile wireless networks. A packet delay improvement up to fourfold has been observed in our simulations

BUBBLE Rap: Social-based forwarding in delay tolerant networks

by Pan Hui, Jon Crowcroft, Eiko Yoneki - in Proc. ACM MobiHoc , 2008
"... In this paper we seek to improve our understanding of human mobility in terms of social structures, and to use these structures in the design of forwarding algorithms for Pocket Switched Networks (PSNs). Taking human mobility traces from the real world, we discover that human interaction is heteroge ..."
Abstract - Cited by 284 (31 self) - Add to MetaCart
In this paper we seek to improve our understanding of human mobility in terms of social structures, and to use these structures in the design of forwarding algorithms for Pocket Switched Networks (PSNs). Taking human mobility traces from the real world, we discover that human interaction

Social Network Analysis for Routing in Disconnected Delay-tolerant MANETs

by Elizabeth Daly, Mads Haahr , 2007
"... Message delivery in sparse Mobile Ad hoc Networks (MANETs) is difficult due to the fact that the network graph is rarely (if ever) connected. A key challenge is to find a route that can provide good delivery performance and low end-to-end delay in a disconnected network graph where nodes may move fr ..."
Abstract - Cited by 276 (1 self) - Add to MetaCart
Message delivery in sparse Mobile Ad hoc Networks (MANETs) is difficult due to the fact that the network graph is rarely (if ever) connected. A key challenge is to find a route that can provide good delivery performance and low end-to-end delay in a disconnected network graph where nodes may move

Dynamic Power Allocation and Routing for Time Varying Wireless Networks

by Michael J. Neely, Eytan Modiano, Charles E. Rohrs - IEEE Journal on Selected Areas in Communications , 2003
"... We consider dynamic routing and power allocation for a wireless network with time varying channels. The network consists of power constrained nodes which transmit over wireless links with adaptive transmission rates. Packets randomly enter the system at each node and wait in output queues to be tran ..."
Abstract - Cited by 358 (73 self) - Add to MetaCart
-hoc wireless network where channel variations are due to user mobility, and compare its performance with the Grossglauser-Tse relay model developed in [13].

Efficient routing in intermittently connected mobile networks: The multiple-copy case

by Thrasyvoulos Spyropoulos, Konstantinos Psounis, Cauligi S. Raghavendra , 2008
"... Intermittently connected mobile networks are wireless networks where most of the time there does not exist a complete path from the source to the destination. There are many real networks that follow this model, for example, wildlife tracking sensor networks, military networks, vehicular ad hoc net ..."
Abstract - Cited by 303 (18 self) - Add to MetaCart
Intermittently connected mobile networks are wireless networks where most of the time there does not exist a complete path from the source to the destination. There are many real networks that follow this model, for example, wildlife tracking sensor networks, military networks, vehicular ad hoc

Pocket Switched Networks and Human Mobility in Conference Environments

by Pan Hui, Augustin Chaintreau, James Scott, Richard Gass, Jon Crowcroft, Christophe Diot , 2005
"... Pocket Switched Networks (PSN) make use of both human mobility and local/global connectivity in order to transfer data between mobile users ’ devices. This falls under the Delay Tolerant Networking (DTN) space, focusing on the use of opportunistic networking. One key problem in PSN is in designing f ..."
Abstract - Cited by 272 (16 self) - Add to MetaCart
Pocket Switched Networks (PSN) make use of both human mobility and local/global connectivity in order to transfer data between mobile users ’ devices. This falls under the Delay Tolerant Networking (DTN) space, focusing on the use of opportunistic networking. One key problem in PSN is in designing
Results 1 - 10 of 2,149