Distributed power control in ad-hoc wireless networks

Agarwal, Sumeet; Katz, R.; Krishnamurthy, Srikanth V.; Dao, Son

doi:10.1109/pimrc.2001.965296

Cited by 249 publications

(162 citation statements)

References 8 publications

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“…In that context, studies generally compute the overall energy consumption (in single-hop or multi-hop scenario) for the network and try to deduce the best protocol. We argue (similar to [27][28][29]) that studying the energy consumption on a link-by-link basis simplifies the whole computation, provided that a suitable PM can be defined.…”

Section: R Agarwal Et Almentioning

confidence: 87%

Error resilient data transport in sensor network applications: A generic perspective

Agarwal

Popovici

Sala

et al. 2008

Circuit Theory & Apps

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SUMMARYThe error recovery problem in wireless sensor networks is studied from a generic resource-constrained energy-optimization perspective. To characterize the features of error recovery schemes that suit the majority of applications, an energy model is developed and inferences are drawn based on a suitable performance metric. For applications that require error control coding, an efficient scheme is proposed based on an interesting observation related to shortened Reed-Solomon (RS) codes for packet reliability. It is shown that multiple instances ( ) of RS codes defined on a smaller alphabet combined with interleaving results in smaller resource usage, while the performance exceeds the benefits of a shortened RS code defined over a larger alphabet. In particular, the proposed scheme can have an error correction capability of up to times larger than that of the conventional RS scheme without changing the rate of the code with much lower power, timing and memory requirements. Implementation results show that such a scheme is 43% more power efficient compared with the RS scheme with the same code rate. Besides, such an approach results in 46% faster computations and 53% reduction in memory requirements.

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Section: R Agarwal Et Almentioning

confidence: 87%

Error resilient data transport in sensor network applications: A generic perspective

Agarwal

Popovici

Sala

et al. 2008

Circuit Theory & Apps

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show abstract

“…Such a procedure is highly inefficient in networks that present an high degree of connectivity since it generates many redundant retransmissions. In addition this procedure suffers from the broadcast storm problem if integrated with random access procedures [21], since neighbor nodes are Ukely to re-transmit a broadcast packet almost at the same time, causing massive collisions.…”

Section: Mac Design and Broadcast Services For Ad Hoc Networkmentioning

confidence: 99%

Broadcast Services and Topology Control in Ad-Hoc Networks

Borgonovo

Cesana

Fratta

2005

IFIP International Federation for Information Processing

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The design of effective Medium Access Control protocol for ad hoc network is a highly challenging task due to the characteristics of such networks. The medium is shared and unreliable by definition, thus the access mechanism should be robust to channel errors and collisions. Furthermore, all the coordination functions must be totally distributed in a pure ad hoc environment.In this paper we address the issue of designing an effective MAC protocol for Inter Vehicular Communications (IVC) networks with a particular focus on broadcast services and topology control capabilities.

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“…First, we investigate the impact of ''probabilistic" transmission rate strategy on energy consumption in 802.11a/h wireless networks, which has not been studied so far. We have three important observations for the 802.11a/h devices: (1) transmitting at a lower physical data rate does not necessary consume less energy than that of a higher data rate; (2) probabilistic rate combination can remarkably reduce energy consumption; (3) in a CSMA/CA wireless network that contains multiple energy-centric selfish nodes, those with smaller traffic loads might have no incentive to increase their data rates. This is the consequence of the famous ''rate anomaly" [8] problem.…”

Section: Introductionmentioning

confidence: 99%

“…However, the switching mechanism of sleep/awake modes cannot reduce the energy during packet transmission. An alternative way to conserve energy is to apply power control [1][2][3][4]. A wireless node is allowed to transmit using the minimum power level that can sustain successful transmissions.…”

Section: Introductionmentioning

confidence: 99%

Improving energy efficiency via probabilistic rate combination in 802.11 multi-rate wireless networks

Xu¹,

Lui²,

Chiu³

2009

Ad Hoc Networks

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a b s t r a c tEnergy efficiency is one of the most important concerns in wireless networks because wireless clients usually have limited battery power. The aim of this work is to reduce energy consumption by exploiting multi-rate diversity in 802.11 wireless networks. An important observation is that ''probabilistic rate combination" in transmission can significantly reduce power consumption. We formulate the energy efficient rate combination as a non-convex optimization problem. A non-cooperative rate adaptation scheme is presented to reduce power consumption without information exchange. Each node selects rate combination strategy and computes its transmission probability based on the weighted average interface queue length. Due to the well-known ''rate anomaly" problem, selfish nodes may choose to transmit at a lower rate free ride from the other nodes. To mitigate this problem, we propose a joint consecutive packet transmission (CPT) and contention window adaptation mechanism (CWA). We prove the stability of our proposed algorithm, and to the best of our knowledge, this is the first control theoretical analysis on 802.11 ''multi-rate" wireless networks. Simulation results show that the probabilistic rate combination can greatly save battery power, even up to 700% times compared with standard 802.11a/h protocol.Crown

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Distributed power control in ad-hoc wireless networks

Cited by 249 publications

References 8 publications

Error resilient data transport in sensor network applications: A generic perspective

Error resilient data transport in sensor network applications: A generic perspective

Broadcast Services and Topology Control in Ad-Hoc Networks

Improving energy efficiency via probabilistic rate combination in 802.11 multi-rate wireless networks

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