Capture effect in IEEE 802.11 basic service area under influence of Rayleigh fading and near/far effect

Hadzi-Velkov, Zoran; Spasenovski, B.

doi:10.1109/pimrc.2002.1046683

Cited by 76 publications

(54 citation statements)

References 6 publications

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“…As far as capture effects are concerned, we resort to the mathematical formulation proposed in [4], [5]. In particular, under the hypothesis of power-controlled stations in infrastructure mode, the capture probability conditioned on i interfering frames can be defined as follows:…”

Section: A Markovian Process Analysis and Throughput Computationmentioning

confidence: 99%

“…WLANs have experienced an exponential growth in the recent past [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. The fundamental impetus has been to replicate the enormous success of wired LANs with obvious advantages a wireless paradigm would bring.…”

Section: Introductionmentioning

confidence: 99%

“…The most relevant work to what is presented here is [2], where the author provided an analysis of the saturation throughput of the basic 802.11 protocol assuming a two dimensional Markov model at the MAC layer, making several fundamental assumptions: 1) the mobile stations always have something to transmit (i.e., the saturation condition), 2) there are no hidden terminals and there is no capture effect (i.e., a terminal which perceives a higher signal-to-noise ratio (SNR) relative to other terminals captures the channel [3], [4], [5] and limits access to other terminals), 3) at each transmission attempt and regardless of the number of retransmissions suffered, each packet collides with constant and independent probability, and 4) the transmission channel is ideal and the only cause of packet errors are collisions. Clearly, the second and fourth assumption is not valid in any real setting, specially when there is mobility and when the transmission channel suffers from fading effects.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Saturation throughput analysis of IEEE 802.11 in the presence of non ideal transmission channel and capture effects

Daneshgaran

Laddomada

Mesiti

et al. 2008

IEEE Trans. Commun.

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In this paper, we provide a saturation throughput analysis of the IEEE 802.11 protocol at the data link layer by including the impact of both transmission channel and capture effects in Rayleigh fading environment. Impacts of both non-ideal channel and capture effects, specially in an environment of high interference, become important in terms of the actual observed throughput. As far as the 4-way handshaking mechanism is concerned, we extend the multi-dimensional Markovian state transition model characterizing the behavior at the MAC layer by including transmission states that account for packet transmission failures due to errors caused by propagation through the channel. This way, any channel model characterizing the physical transmission medium can be accommodated, including AWGN and fading channels. We also extend the Markov model in order to consider the behavior of the contention window when employing the basic 2-way handshaking mechanism.Under the usual assumptions regarding the traffic generated per node and independence of packet collisions, we solve for the stationary probabilities of the Markov chain and develop expressions for the saturation throughput as a function of the number of terminals, packet sizes, raw channel error rates, capture probability, and other key system parameters. The theoretical derivations are then compared to simulation results confirming the effectiveness of the proposed models.

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Section: A Markovian Process Analysis and Throughput Computationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Saturation throughput analysis of IEEE 802.11 in the presence of non ideal transmission channel and capture effects

Daneshgaran

Laddomada

Mesiti

et al. 2008

IEEE Trans. Commun.

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“…They observed that under some conditions a later, stronger packet can be received at the expense of an earlier weaker packet, which is a case that we observed but did not present results for. A number of papers have studied the impact of packet capture on throughput, delay, and/or fairness [23,14,7,4]. They do not directly characterize the capture effect, but instead focus on how it affects performance.…”

Section: Related Workmentioning

confidence: 99%

Understanding link-level 802.11 behavior: replacing convention with measurement

Judd

Steenkiste

2007

Proceedings of the 3rd International ICSTConference on Wireless Internet

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Since wireless signals propagate through the ether, they are significantly affected by attenuation, fading, and interference. As a result, it is often difficult to measure and understand fundamental wireless network behavior. This creates a challenge for both network researchers, who often rely on simulators to evaluate their work, and network managers, who need to deploy and optimize operational networks. Given the complexity of wireless networks, both communities often rely on simplifying rules, which often have not been validated using today's wireless radios. In this paper, we undertake a detailed analysis of 802.11 link-level behavior using real hardware and a physical layer wireless network emulator that gives us complete control over signal propagation. We replace conventional assumptions and possible misconceptions with actual recorded behavior. Additionally, we analyze the impact of our observations on commonly deployed networks. Our work contributes to a more accurate understanding of link-level behavior and enables the development of more accurate wireless network simulators.

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“…PLC in IEEE 802.11 has been extensively studied both analytically (e.g., [1][2][3][4]) and experimentally (e.g., [5][6][7][8][9][10]). In the existing studies, however, only the collision between data frames is considered.…”

Section: Introductionmentioning

confidence: 99%

Acknowledgement Corruption: A New Aspect of Physical Layer Capture in IEEE 802.11 Networks

Han

Choi

Han

2018

Wireless Communications and Mobile Computing

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Even if a collision occurs in IEEE 802.11 network, a transmission may be successfully decoded at the receiver if the signal strength of one transmission is sufficiently stronger than the other transmission. This phenomenon is called "Physical Layer Capture" (PLC). While existing works have considered PLC between data frames, in this paper we investigate the case that an ACK frame collides with the unfinished transmission of other data frames after the occurrence of PLC between data frames. As a result of this collision, the ACK frame may be corrupted and the corresponding data frame needs to be retransmitted. We call this phenomenon "ACK Corruption" (AC). We identify the characteristic of AC via extensive experiments and simulations. Our study reveals that AC can occur in all IEEE 802.11 variants and its chance is dependent upon the relative signal strength between the stations and the MCS setting used. Further, we devise a way to avoid AC occurrence and evaluate its effectiveness.

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Capture effect in IEEE 802.11 basic service area under influence of Rayleigh fading and near/far effect

Cited by 76 publications

References 6 publications

Saturation throughput analysis of IEEE 802.11 in the presence of non ideal transmission channel and capture effects

Saturation throughput analysis of IEEE 802.11 in the presence of non ideal transmission channel and capture effects

Understanding link-level 802.11 behavior: replacing convention with measurement

Acknowledgement Corruption: A New Aspect of Physical Layer Capture in IEEE 802.11 Networks

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