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This paper is focused on the analysis of energy-aware multi hop routing metrics for wireless environments which integrate heterogeneous devices that are carried or owned by Internet end-users. The paper gives our own (initial) perspective on how network energy-savings may be improved by considering not only a single (sender) node perspective, but also the perspective of its potential successors when...
Opportunistic routing in wireless networks has strong requirement with nodes' cooperation. But in most realistic networks, nodes perform in their own interests and refuse to forward packets for others when they belong to different organizations. The aim of this paper is to provide a fair incentive mechanism to encourage cooperation and achieve the energy efficient. We propose an auction incentive...
In multi-hop wireless networks, if we know the packet reception rates of all links in the network, we can find the path with the minimum energy consumption. However, to obtain the packet reception rates with high accuracy, we need a number of exchanges of probe packets. Also, the energy consumption along a path depends on a routing method. In this paper, we consider three routing methods and evaluate...
A spectrum leasing mechanism is proposed for the coexistence between a primary and a secondary network that is based on cooperation and opportunistic routing. The primary network consists of a source and a destination communicating via a number of primary relay nodes. In each transmission slot, the next hop is selected in an on-line fashion based on the decoding outcomes in the previous transmissions...
In this paper, a general framework, called probability-based solution (PBS), is proposed to balance the trade-off between the accessibility (in terms of the success probability to find a route reaching the destination) and the performance (in terms of spectral efficiency, outage probability or energy consumption) of distributed routing schemes in multi-hop wireless networks. In the PBS, the candidate...
A new approach to improving the energy consumption and node reachability of multihop networks is to dynamically combine multihop routing with single-frequency networks (transmitter macrodiversity), i.e. several nodes sending the same signal simultaneously over the same frequency channel. Four routing algorithms are suggested and evaluated for a broadcasting scenario. Simulation results show that the...
The trend of adopting more and more wireless mobile computers and smartphones has changed our way of living. Those devices heavily rely on the underlying wireless network systems to provide adequate communication support. As streaming audio and video becomes norm, the requests for stringent maximum end-to-end latency and minimum bandwidth make the networking process more difficult. Quality of Service...
Geographic Routing (GR) algorithms are increasedly studied in ad-hoc wireless networks, and energy efficiency is of particular interest. Among the existing GR algorithms, the Most Forward within Radius (MFR) algorithm selects the next hop node as far as possible from the source node to minimise the network delay time while the energy consumption is not considered. The Nearest Forward Progress (NFP)...
Two of the most important concerns in todaypsilas wireless network systems and mobile devices are communication security and energy consumption. Most of the time, wireless system designers treat these two issues separately, which usually results in a non-optimized final product. In general, the more security features a system uses, the more energy it consumes. While it is arguable about what an optimized...
Existing power efficient geographic routing algorithms have been shown to be able to reduce power consumption and hence prolong the lifetime of multi-hop wireless networks. However, in practical deployment scenarios where location errors inevitably exist, these algorithms are vulnerable to a substantial performance degradation in terms of energy consumption. Since location errors always exist no matter...
Nodes in ad hoc networks can be unfairly burdened to support many packet-relaying functions, resulting in excessive loads on these hot spots. This load on nodes appears in two major aspects: traffic and power consumption. Unbalanced traffic may lead to more delay, packet dropping, and decreasing packet delivery ratio (PDR). Unbalanced energy consumption leads to node failure, network partitioning...
We address the problem of energy balancing in multi-hop wireless networks to optimize their operational lifetime. We first present a localized routing algorithm. Then, for a performance evaluation of the localized algorithm, we present a centralized routing algorithm because a centralized approach with global knowledge can closely approach the optimal solution. Unlike many previous energy-aware routing...
High security and low energy consumption are two of the most important features in implementing today's wireless network systems and applications. They are not totally unrelated in terms of system design. In fact, there is a tradeoff relationship between security and energy. Generally the more secure a system is, the more energy it consumes. In this paper, we integrate a confidentiality (security)...
In this paper, we have considered the optimization of the M-ary quadrature amplitude modulation (MQAM) constellation size to minimize the bit energy consumption under average bit error rate (BER) constraints. In the computation of the energy expenditure, the circuit, transmission, and retransmission energies are taken into account. A combined log-normal shadowing and Rayleigh fading model is employed...
Vehicle-based networks need energy-efficient communication to extend the battery lifetime, which subsequently extends the mission time of the node. We observe that these kinds of networks operate under different assumptions than traditional static sensor networks. The main difference is that these are small-scale networks. This motivates the need for a protocol that is optimized for such scenarios...
Energy management is the key issue in the design and operation of wireless network applications like sensor networks, pervasive computing and ubiquitous computing where the network is primarily driven by battery-powered embedded devices. This paper studies network coding as an energy minimization technique. Network coding reduces the energy consumption by minimizing the number of transmissions required...
An ad hoc network is comprised of mobile hosts without any wired infrastructure support. Multipath routing allows the establishment of multiple paths between a source and a destination. It distributes traffic among multiple paths instead of routing all the traffics along a single path. In this paper, we propose a new multipath routing protocol that uses all discovered paths simultaneously for transmitting...
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