We present an overview of ad hoc routing protocols that make forwarding decisions based on the geographical position a packet's destination. Other than destination's position, each node need know only its own and one-hop neighbors in order to forward packets. Since it is not necessary maintain explicit routes, position-based does scale well even if network highly dynamic. This major advantage mobile where topology may change frequently. The main prerequisite for sender can obtain current...

This paper proposes a mechanism for equation-based congestion control unicast traffic. Most best-effort traffic in the current Internet is well-served by dominant transport protocol, TCP. However, such as streaming multimedia could find use TCP-friendly that refrains from reducing sending rate half response to single packet drop. With our mechanism, sender explicitly adjusts its function of measured loss events, where event consists one or more packets dropped within round-trip time. We both...

Network coding is a new research area that may have interesting applications in practical networking systems. With network coding, intermediate nodes send out packets are linear combinations of previously received information. There two main benefits this approach: potential throughput improvements and high degree robustness. Robustness translates into loss resilience facilitates the design simple distributed algorithms perform well, even if decisions based only on partial This paper an...

In this article we provide a comprehensive review of the existing literature on techniques and protocols for in-network aggregation in wireless sensor networks. We first define suitable criteria to classify solutions, then describe them by separately addressing different layers protocol stack while highlighting role cross-layer design approach, which is likely be needed optimal performance. Throughout identify discuss open issues, propose directions future research area

This paper proposes a mechanism for equation-based congestion control unicast traffic. Most best-effort traffic in the current Internet is well-served by dominant transport protocol, TCP. However, such as streaming multimedia could find use TCP-friendly that refrains from reducing sending rate half response to single packet drop. With our mechanism, sender explicitly adjusts its function of measured loss events, where event consists one or more packets dropped within round-trip time. We both...

With the ratification of IEEE 802.11ad amendment to 802.11 standard in December 2012, a major step has been taken bring consumer wireless communication millimeter wave band. However, multi-gigabit-per-second throughput and small interference footprint come at price adverse signal propagation characteristics, require fundamental rethinking Wi-Fi principles. This article describes design assumptions into consideration for novel techniques defined overcome challenges mm-Wave communication. In...

Some forms of ad-hoc networks need to operate in extremely performance-challenged environments where end-to-end connectivity is rare. Such can be found for example very sparse mobile nodes "meet" only occasionally and are able exchange information, or wireless sensor sleep most the time conserve energy. Forwarding mechanisms such usually resort some form intelligent flooding, as probabilistic routing.We propose a communication algorithm that significantly reduces overhead routing algorithms,...

The full degree of freedom in mobile systems heavily depends on the energy provided by phone's batteries. Their capacity is general limited and for sure not keeping pace as devices are crammed up with new functionalities. discrepancy Moore's law, offering twice processing power at least each second year, development batteries, which did even double over last decade, makes a shift researchers' way designing networks, protocols, device itself. bottleneck to take care design process only...

Millimeter-wave communication achieves multi-Gbps data rates via highly directional beamforming to overcome pathloss and provide the desired SNR. Unfortunately, establishing with sufficiently narrow beamwidth obtain necessary link budget is a high overhead procedure in which search space scales device mobility product of sender-receiver beam resolution. In this paper, we design, implement, experimentally evaluate Blind Beam Steering (BBS) novel architecture algorithm that removes in-band for...

A growing trend for information technology is to not just react changes, but anticipate them as much possible. This paradigm made modern solutions, such recommendation systems, a ubiquitous presence in today's digital transactions. Anticipatory networking extends the idea communication technologies by studying patterns and periodicity human behavior network dynamics optimize performance. survey collects analyzes recent papers leveraging context forecast evolution of conditions and, turn,...

New trends in communication, particular the deployment of multicast and real-time audio/video streaming applications, are likely to increase percentage non-TCP traffic Internet. These applications rarely perform congestion control a TCP-friendly manner; they do not share available bandwidth fairly with built on TCP, such as Web browsers, FTP, or e-mail clients. The Internet community strongly fears that current evolution could lead collapse starvation TCP traffic. For this reason, protocols...

In this paper we introduce TFMCC, an equation-based multicast congestion control mechanism that extends the TCP-friendly TFRC protocol from unicast to domain. The key challenges in design of TFMCC lie scalable round-trip time measurements, appropriate feedback suppression, and ensuring delays loop do not adversely affect fairness towards competing flows. A major contribution is mechanism, component end-to-end schemes. We improve upon well-known approach using exponentially weighted random...

article Share on Position-based multicast routing for mobile Ad-hoc networks Authors: Martin Mauve Institute Mathematics and Computer Science-University of Mannheim, Germany GermanyView Profile , Holger Füßler Jörg Widmer Thomas Lang Authors Info & Claims ACM SIGMOBILE Mobile Computing Communications ReviewVolume 7Issue 3July 2003 pp 53–55https://doi.org/10.1145/961268.961288Published:01 July 2003Publication History 104citation756DownloadsMetricsTotal Citations104Total Downloads756Last 12...

We show that network coding allows to realize energy savings in a wireless ad-hoc network, when each node of the is source wants transmit information all other nodes.Energy efficiency directly affects battery life and thus critical design parameter for networks.We propose an implementable method performing such setting.We analyze theoretical cases detail, use insights gained practical, fully distributed realistic scenarios.We address practical issues as setting forwarding factor, managing...

We consider the problem of broadcasting in an ad hoc wireless network, where all nodes network are sources that want to transmit information other nodes. Our figure merit is energy efficiency, a critical design parameter for networks since it directly affects battery life and thus lifetime. prove applying ideas from coding allows realize significant benefits terms efficiency broadcasting, propose very simple algorithms allow these practice. In particular, our theoretical analysis shows...

Position-based routing has proven to be a scalable and efficient way for packet in mobile ad-hoc networks. To enable position-based routing, node must able discover the location of it wants communicate with. This task is typically accomplished by service. In this paper, we propose novel service called HLS (Hierarchical Location Service). divides area covered network into hierarchy regions. The top level region covers complete network. A subdivided several regions next lower until lowest...

Compressive Sensing (CS) shows high promise for fully distributed compression in wireless sensor networks (WSNs). In theory, CS allows the approximation of readings from a field with excellent accuracy, while collecting only small fraction them at data gathering point. However, conditions under which performs well are not necessarily met practice. requires suitable transformation that makes signal sparse its domain. Also, given by routing protocol and network topology representation have to...

In order to cope with the severe path loss, millimeter-wave (mm-wave) systems exploit highly directional communication. As a consequence, even slight beam mis-alignment between two communicating devices (for example, due mobility) can generate significant signal drop. This leads frequent invocations of time-consuming mechanisms for re-alignment, which deteriorate system performance. this paper, we propose smart training and tracking strategies fast mm-wave link establishment maintenance...

Achieving data-rates of multiple Gbps in 60 GHz millimeter-wave (mm-wave) communication systems requires efficient beam-steering algorithms. To find the optimal steering direction on IEEE 802.11ad compatible devices, state-of-the-art approaches sweep through all predefined antenna sectors. Recently, much more alternatives, such as compressive path tracking, have been proposed, which scale well even with arrays thousands elements. However, not yet integrated into consumer devices. In this...

The performance of current consumer-grade devices for 60 GHz wireless networks is limited. While such promise both high data rates and uncomplicated spatial reuse, we find that commercially available based on the WiHD WiGig standards may suffer from their cost-effective design. Very similar mechanisms are used in upcoming IEEE 802.11ad standard. Hence, understanding them well crucial to improve efficiency next generation millimeter wave networks. In this paper, present first in-depth...

This article presents a shared vision among stakeholders across the value chain on use of radio positioning and sensing for road safety in 5G ecosystem. The key enabling technologies architectural functionalities are explored, focusing extremely stringent localization communication requirements. A case study joint radar using experimental data showcases potential new enablers that paving way toward enhanced beyond scenarios.

Motivated by streaming applications with stringent delay constraints, we consider the design of online network coding algorithms timely delivery guarantees. Assuming that sender is providing same data to multiple receivers over independent packet erasure channels, focus on case perfect feedback and heterogeneous probabilities. Based a general analytical framework for evaluating decoding delay, show existing ARQ schemes fail ensure weak channels are able recover from losses within reasonable...