CTH15-5: Rate Adaptation for Cooperative Systems

Lin, Zinan; Erkip, Elza; Ghosh, Monisha

doi:10.1109/glocom.2006.121

Cited by 21 publications

(22 citation statements)

References 7 publications

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Section: Introductionmentioning

confidence: 99%

“…The idea of joint adaptation of coding rates and level of cooperation is proposed in [9]. Results from [9] show that coded cooperation with adaptation provides substantial improvement over direct transmission and conventional multi-hop connections. Authors of [10] first derive the outage capacity for Selection DF (SDF) cooperative relaying with N relays with ideal rate adaptation schemes for typical topologies.…”

Section: Introductionmentioning

confidence: 99%

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CORELA: A cooperative relaying enhanced link adaptation algorithm for IEEE 802.11 WLANs

Kaleshi

Fan

2011

2011 8th International Symposium on Wireless Communication Systems

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Abstract-One of the key challenges for cooperative relaying multi-rate wireless networks is the integration and interaction of relaying with link adaptation algorithms, in particular under incomplete and/or imprecise channel state information conditions. In this paper we propose a practical cooperative relaying link adaptation medium access protocol that considers the historical link quality to enable the relay terminal to adjust its transmission relaying rate by estimating the error probability based on past packet transmission history. Simulation results show that this protocol achieves significant performance improvement in terms of end-to-end throughput and energy efficiency for different network conditions compared with other link adaptation algorithms. It also has the best performance of the direct transmission without perfect knowledge of current channel condition.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

CORELA: A cooperative relaying enhanced link adaptation algorithm for IEEE 802.11 WLANs

Kaleshi

Fan

2011

2011 8th International Symposium on Wireless Communication Systems

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“…Link adaptation is discussed for application in cooperative communication networks, in which wireless nodes work together to transmit information [33,34]. ACM is combined in conjunction with relay adaptation to limit effects of time-varying fading channels and exploit favorable conditions to maximize data throughput [33][34][35].…”

Section: Prior Workmentioning

confidence: 99%

“…ACM is combined in conjunction with relay adaptation to limit effects of time-varying fading channels and exploit favorable conditions to maximize data throughput [33][34][35].…”

Section: Prior Workmentioning

confidence: 99%

Link adaptation for mitigating Earth-to-Space propagation effects on the NASA SCaN testbed

Kilcoyne

Rowe

Headley

et al. 2016

2016 IEEE Aerospace Conference

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In Earth-to-Space communications, well-known propagation effects such as path loss and atmospheric loss can lead to fluctuations in the strength of the communications link between a satellite and its ground station. Additionally, a less-often considered effect of shadowing due to the geometry of the satellite and its solar panels can also lead to link degradation. As a result of these anticipated channel impairments, NASA communication links have been traditionally designed to handle the worst-case impact of these effects through high link margins and static, lower rate, modulation formats. This thesis first characterizes the propagation environment experienced by a software-defined radio on the NASA SCaN Testbed through a full link-budget analysis. Then, the following chapters propose, design, and model a link adaptation algorithm to provide an improved trade-off between data rate and link margin through varying the modulation format as the received signal-to-noise operate at the most robust transmitting configuration, ensuring a low error-rate. However, with this worst-case method, the trade-off manifests in the very constrained data rate-although the data is transmitted with minimal errors, the throughput also remains low. This thesis first outlines the propagation environment experienced by a communications signal originating in Cleveland, OH and traveling to a software-defined radio on the NASA SCaN Testbed. Then, a link adaptation algorithm is designed and simulated to provide an improved trade-off between data rate and bit error rate. This flexibility between transmitting configurations allows for communications to be more efficient, as the transmitter can adapt as the signal strength improves.

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“…The idea of joint adaptation of coding rates, modulation modes and level of cooperation is proposed in [8]. However, [8] assumes idealized multiple access schemes where transmissions among terminals are perfectly coordinated and the protocols are evaluated in simplified topologies, i.e.…”

Section: Introductionmentioning

confidence: 99%

CARLA: Combining Cooperative Relaying and Link Adaptation for IEEE 802.11 Wireless Networks

Fan

Kaleshi

2012

2012 IEEE 75th Vehicular Technology Conference (VTC Spring)

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Abstract-In this paper, we present a novel design named CARLA which combines Cooperative Relaying and Link Adaptation for IEEE 802.11 wireless networks, in order to maximize spectral efficiency and hence improve the throughput of the network. Unlike previous studies assuming that accurate channel information is available for relaying and link adaptation, the novelty of our approach is to use the expected packet transmission time (ETT) and RTS/CTS exchange to estimate the quality and level of contention for the current channel. By taking into account the quality of the direct channel from source to destination and the relay channel between relay and destination, CARLA enables both source and relay terminals to adjust their transmission rates so that not only the reliability of the transmission but also the bandwidth efficiency can be improved, hence fully utilizing the diversity gain. CARLA is a simple, distributed and rate-per-link adaptation protocol requiring no modification on 802.11 PHY and MAC. Simulation results show that CARLA can achieve significant performance improvement in terms of end-to-end throughput and energy efficiency for different network conditions.

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CTH15-5: Rate Adaptation for Cooperative Systems

Cited by 21 publications

References 7 publications

CORELA: A cooperative relaying enhanced link adaptation algorithm for IEEE 802.11 WLANs

CORELA: A cooperative relaying enhanced link adaptation algorithm for IEEE 802.11 WLANs

Link adaptation for mitigating Earth-to-Space propagation effects on the NASA SCaN testbed

CARLA: Combining Cooperative Relaying and Link Adaptation for IEEE 802.11 Wireless Networks

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