Enhanced Rate Adaptation Schemes with Collision Awareness

Kim, Seongkwan; Choi, Sunghyun; Qiao, Daji; Kim, Jong-Seok

doi:10.1007/978-3-540-72606-7_108

Cited by 9 publications

(10 citation statements)

References 4 publications

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“…We evaluate the following rate adaptation schemes: ARF [1], CARA-BASIC [4], CARA-RI [5], RRAA [3], and PBRA. The schemes are compared with each other in terms of the aggregate system throughput (in Mbps).…”

Section: Performance Evaluationmentioning

confidence: 99%

“…CARA's rate adjustment component is based on the ARF, which is aggressive in decreasing the transmission rate (i.e., upon observation of two successive failures), and is relatively conservative in increasing the rate (i.e., upon observation of 10 consecutive successes). CARA-RI [5] is an enhancement to CARA. It only resets the consecutive success count when the transmission rate starts decreasing.…”

Section: Introductionmentioning

confidence: 99%

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Probabilistic-Based Rate Adaptation for IEEE 802.11 WLANs

Chen

Qiao

et al. 2007

IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference

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Abstract-Collision awareness has been recognized as a critical component for effective rate adaptation schemes. Recently, several collision-aware rate adaptation schemes have been proposed for IEEE 802.11 Wireless LANs (WLANs), such as CARA (Collision Aware Rate Adaptation) and RRAA (Robust Rate Adaptation Algorithm). These schemes are able to distinguish between channelerror-induced and collision-induced frame losses via adaptive and appropriate usage of RTS/CTS; hence the multiple transmission rates provided by 802.11 physical layers (PHYs) may be fully exploited. In this paper, we propose a unique collision-aware rate adaptation scheme, called PBRA (Probabilistic-Based Rate Adaptation). The key ideas of PBRA include (i) probabilistic-based adaptive usage of RTS/CTS, which is in direct contrast to trialbased RTS Probing in CARA and window-based adaptive usage of RTS/CTS in RRAA; and (ii) threshold-based rate adjustment, which allows a station to make more appropriate rate adjustment decisions, thanks to its accurate estimation of the channel-error-induced frame loss ratio. Simulation results show that PBRA clearly outperforms all other testing schemes (including CARA and RRAA), particularly in random topology networks with fading wireless channels.

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Section: Performance Evaluationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Probabilistic-Based Rate Adaptation for IEEE 802.11 WLANs

Chen

Qiao

et al. 2007

IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference

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“…The adaptive RTS/CTS mechanisms cannot eliminate the impact of collision on rate selection. We believe that there is room for improvement, especially with the help of information gained from the nodes themselves [5].…”

Section: Introductionmentioning

confidence: 99%

“…Most of them are designed to work in realistic scenarios without Request to Send (RTS) and/or Clear to Send (CTS) [5]. The research on rate adaptation is challenging and far from being completed, especially in recent extremely complicated communication environments, e.g.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Algorithm for Rate Adaption for IEEE 802.11 Networks

Mohamed

Bahgat

Mohamed

2015

Advances in Intelligent Systems and Computing

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The IEEE 802.11 standards provide multi-rates capabilities; therefore, network devices adapt their transmission rate dynamically under varying conditions to achieve high network performance. Rate adaption is a critical component of network performance. High mobility environment and large transmission distance are challenging problems. These problems cause dramatically degradation in wireless network performance. In this paper we will present a solution to overcome these problems based on RRAA. There are two main contributions of the paper: introducing/updating performance evaluation study conducted in IEEE 802.11 networks for most existing rate adaptation algorithms; the simulation results showed that the RRAA has the best performance except for long transmission distance and mixed mobility channel condition and (ii) introducing a modified RRAA algorithm to address the weakness of RRAA. Modified RRAA uses hybrid technique between fixed and adaptive rates. Moreover, it uses adaptive packet size during transmission to achieve maximum throughput of channel. The extensive experiments showed that, Modified RRAA outperforms pure RRAA solutions; with throughput improvement up to 63.27 % in scenarios containing mixed mobility at long transmission distance between nodes.Keywords Robust rate adaptation algorithm (RRAA) ⋅ Adaptive automatic rate fallback (AARF) ⋅ Collision rate adaption algorithm (CARA)

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“…These extensions enhanced the PHY and MAC layer capabilities of the original standard. The IEEE 802.11 standard specifies transmissions at various rate, for instance, the Extended rate PHY (ERP), provides payload transmission support at 1, 2, 5.5, 6,9,12,18,24,36,48 and 54 Mbps. Two additional modes are defined to support payload transmission at 22 and 33 Mbps.…”

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confidence: 99%

Rate-adaptation for multi-rate IEEE 802.11 WLANs using mutual feedback between transmitter and receiver

Khan

Mahmud

Noureddine

et al. 2010

21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications

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The IEEE 802.11 standard conformant wireless communication stations have multi-rate transmission capability. To achieve greater communication efficiency, multirate capable stations use rate-adaptation to select appropriate transmission rate according to variations in the channel quality. This paper proposes a novel rate-adaptation scheme where the decision of rate selection relies on the mutual feedback of a transmitter and receiver pair. As an important feature of a rate-adaptation scheme, our proposed solution is highly responsive when compared with existing rateadaptation scheme. Using the mutual-feedback, it has been made possible to achieve frame-loss differentiation with just three frames, avoiding the use of RTS/CTS and further delays in this process. Unlike the previous approaches, the feedback is delivered to the transmitter without any changes to the standard frame format. Various performance tests assert the suitability of our proposed solution in different test scenarios over existing rate-adaptation schemes.

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Enhanced Rate Adaptation Schemes with Collision Awareness

Cited by 9 publications

References 4 publications

Probabilistic-Based Rate Adaptation for IEEE 802.11 WLANs

Probabilistic-Based Rate Adaptation for IEEE 802.11 WLANs

Enhanced Algorithm for Rate Adaption for IEEE 802.11 Networks

Rate-adaptation for multi-rate IEEE 802.11 WLANs using mutual feedback between transmitter and receiver

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