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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
are in battlefield, disaster recovery and wide area surveillance. Unfortunately, most existing ad hoc routing protocols will fail to deliver messages under these circumstances since no route to the destination exists. In this work, we propose the Message Ferrying or MF scheme that provides efficient data delivery

Controlling the Mobility of Multiple Data Transport Ferries in a Delay-Tolerant Network

by Wenrui Zhao, Mostafa Ammar, Ellen Zegura - in IEEE INFOCOM , 2005
"... combine both communication and mobility capabilities. With mobility in devices, we envision a new class of proactive networks that are able to adapt themselves, via physical movement, to meet the needs of applications. To fully realize these opportunities, effective control of device mobility and th ..."
Abstract - Cited by 145 (4 self) - Add to MetaCart
and the interaction between devices is needed. In this paper, we consider the Message Ferrying (MF) scheme which exploits controlled mobility to transport data in delay-tolerant networks, where end-to-end paths may not exist between nodes. In the MF scheme, a set of special mobile nodes called message ferries

Performance of MF-MSK Systems with Pre-distortion Schemes

by Labib Francis Gergis
"... Efficient RF power amplifiers used in third generation systems require linearization in order to reduce adjacent channel inter-modulation distortion, without sacrificing efficiency. Digital baseband predistortion is a highly cost-effective way to linearize power amplifiers (PAs). New communications ..."
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presents a technique for improving TWTA linearity. The use of predistorter (PD) linearization technique is described to provide TWTA performance comparable or superior to conventional SSPA's. The characteristics of the PD scheme is derived based on the extension of Saleh's model for HPA

1 The Buckland Park MF radar: Routine observation scheme and velocity comparisons

by David A. Holdsworth, Iain M. Reid, Short Title
"... This paper describes the routine observations scheme implemented for the Buckland Park medium frequency (BPMF) radar. These observations are rare among current MF/HF radar observations in that they are made using a relatively narrow transmit polar diagram. The flexibility of the radar allows a numbe ..."
Abstract - Cited by 2 (1 self) - Add to MetaCart
This paper describes the routine observations scheme implemented for the Buckland Park medium frequency (BPMF) radar. These observations are rare among current MF/HF radar observations in that they are made using a relatively narrow transmit polar diagram. The flexibility of the radar allows a

A Hybrid Beamforming Scheme for a Special Study of Non- Regenerative Multi-antenna Multi-Group Multi-Way Relaying

by Ngatu Ly, Tu Kha Huynh, Linh Mai
"... Abstract — We consider a transceiver beamforming design problem for non-regenerative multi-antenna multi-group multi-way relaying channel (MGMWRC) when the number of communication phases to complete the full data exchange equals to the maximum number of nodes among all groups. The first phase is mul ..."
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Distortion Response (MVDR)-Matched Filter (MF) schemes and Coherent Combining (CC) scheme for bi-directional pairs of odd users in MGMWRC. The average sum rate and symbol error rate simulation results are provided to compare the performance of the proposed scheme and all conventional schemes under 3 types

Performance Evaluations of Various Message Ferry Scheduling Schemes with Two Traffic Classes

by Mooi Choo Chuah
"... Designing a routing scheme for partitioned ad-hoc networks is challenging since end-to-end connectivity may not exist. A Message ferrying (MF) scheme has been proposed recently for delivering non-real-time traffic. In this ferrying scheme, message ferries are used to collect and deliver packets. In ..."
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Designing a routing scheme for partitioned ad-hoc networks is challenging since end-to-end connectivity may not exist. A Message ferrying (MF) scheme has been proposed recently for delivering non-real-time traffic. In this ferrying scheme, message ferries are used to collect and deliver packets

ferry replacement protocols in sparse manet message ferrying systems

by Jeonghwa Yang, Yang Chen, Mostafa Ammar, Chungkee Lee, Jeonghwa Yang, Yang Chen, Mostafa Ammar, Chungkee Lee - In Proc. IEEE Wireless Communications and Networking (WCNC , 2005
"... The Message Ferrying (MF) scheme has been proposed as a strategy for providing connectivity in sparse partitioned ad hoc networks. A set of nodes called ferries are responsible for carrying messages for all nodes in the networks. A ferry periodically moves around the deployed area along a pre-determ ..."
Abstract - Cited by 6 (0 self) - Add to MetaCart
The Message Ferrying (MF) scheme has been proposed as a strategy for providing connectivity in sparse partitioned ad hoc networks. A set of nodes called ferries are responsible for carrying messages for all nodes in the networks. A ferry periodically moves around the deployed area along a pre

Basic Capacity Calculation Methods and Benchmarking for MF-TDMA

by Darren D. Chang, Olivier L. De Weck, D. Chang, O. De Weck - and MF-CMDA Communication Satellites,” AIAA 21st International Communication Satellite Systems Conference, Yokohoma
"... This paper introduces basic capacity calculation methods for circuit switched, multiple-beam, low earth orbit (LEO) communication satellites that use MF-TDMA and MF-CDMA schemes. Capacity is de¯ned as the number of simultaneous duplex channels that a satellite can support for a given data rate and b ..."
Abstract - Cited by 5 (4 self) - Add to MetaCart
This paper introduces basic capacity calculation methods for circuit switched, multiple-beam, low earth orbit (LEO) communication satellites that use MF-TDMA and MF-CDMA schemes. Capacity is de¯ned as the number of simultaneous duplex channels that a satellite can support for a given data rate

M.F.: Discontinuous Galerkin methods for flow and transport problems in porous media

by Mary F. Wheeler - Commun. Numer. Methods Eng. 18, 63–68 (2002) Comput Geosci , 2011
"... This work presents a new scheme based on discontinuous approximation spaces for solving the miscible displacement problem in porous media. Numerical comparisons are made between this scheme and the well known mixed finite element and higher order Godunov methods. The simulations clearly show the adv ..."
Abstract - Cited by 12 (4 self) - Add to MetaCart
This work presents a new scheme based on discontinuous approximation spaces for solving the miscible displacement problem in porous media. Numerical comparisons are made between this scheme and the well known mixed finite element and higher order Godunov methods. The simulations clearly show

Message Ferrying Scheme with Differentiated Services

by Mooi Choo Chuah - Proceedings of IEEE Milcom , 2005
"... Routing in partitioned ad-hoc networks is a challenging problem since end-to-end connectivity may not exist. A Message ferrying (MF) [7] scheme has been proposed recently for non-real-time applications where certain mobile nodes referred to as message ferries are designated to collect and deliver pa ..."
Abstract - Cited by 5 (2 self) - Add to MetaCart
Routing in partitioned ad-hoc networks is a challenging problem since end-to-end connectivity may not exist. A Message ferrying (MF) [7] scheme has been proposed recently for non-real-time applications where certain mobile nodes referred to as message ferries are designated to collect and deliver
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