On the side-effects of proprietary solutions for fading and interference mitigation in IEEE 802.11b/g outdoor links

Tinnirello, Ilenia; Giustiniano, Domenico; Scalia, Luca; Bianchi, Giuseppe

doi:10.1016/j.comnet.2008.10.006

Cited by 32 publications

(35 citation statements)

References 14 publications

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“…Experiments we performed reproduced findings in [10] that showed that, without weak signal detection, only packets with a reported RSS above 14dBm were successfully received. 2) Capture Effect: The reception of a packet is aborted.…”

Section: B Ieee 80211 Atheros Radio: Bells and Whistlessupporting

confidence: 65%

“…As already mentioned in the introduction and observed in [10], modern radio chipsets implement a number of proprietary signal processing features that aim at increasing the radio performance. The rest of this section lists these features.…”

Section: B Ieee 80211 Atheros Radio: Bells and Whistlesmentioning

confidence: 99%

“…While some of the features that we describe are IEEE 802.11a specific, most of the discussion applies to IEEE 802.11 in general. We base our discussion mainly on empirical evidence gathered through experiments in our testbed, related work [10], [8], [7], [13], [14], [12] In IEEE 802.11 networks, each packet contains a preamble, which is used for packet detection (also referred as signal detection) by the receiving radio as well as for timing acquisition (in order to find out when the payload actually begins), and also by various hardware calibration algorithms (for instance automatic gain control and frequency offset estimation) and channel estimation necessary for optimal decoding of the payload. The payload comprises the actual data to be transmitted and a header that contains information about the used transmission mode.…”

Section: System Description: Carrier Sensing and Signal Detectionmentioning

confidence: 99%

“…3) Adaptive Noise Immunity (ANI) Algorithm: The ANI algorithm [18], [10] attempts to adaptively set several receiver parameters to enhance its robustness to several external sources of interference created by RF impairments. Essentially, the algorithm monitors the rate of false detection.…”

Section: B Ieee 80211 Atheros Radio: Bells and Whistlesmentioning

confidence: 99%

“…In [9], when physical transmission rate is set 1Mb/s, the wireless links are found to be highly stable. Additionally, the effect of proprietary solutions used in wireless interface cards should be taken into account [10]. Therefore, in this paper, we present the following contributions:…”

Section: Introductionmentioning

confidence: 99%

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Joint Transmission Rate, Power, and Carrier Sense Settings: An Initial Measurement Study

Huehn

Merz

Sengul

2010

2010 Fifth IEEE Workshop on Wireless Mesh Networks

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Abstract-A substantial variety of control algorithms to adjust carrier sensing, transmission power, and transmission rate have been proposed for IEEE 802.11 wireless networks in the recent literature. Their objectives range from maximizing throughput, spatial reuse, and fairness to minimizing interference and congestion within the network. However, only a few of these have been implemented and analysed in practice, often because accessing and changing the necessary parameters in the wireless hardware is too difficult. Essentially, there is little understanding about the interactions of jointly adjusted transmission rate, power and carrier sense thresholds, and their impact on the aforementioned objectives. Therefore, in this paper, we focus on transmission rate, power and carrier sensing settings. We provide a detailed description of the common IEEE 802.11 radio hardware, especially in terms of carrier-sensing circuitry. We then present our results from our validation and initial measurement study, which demonstrate interactions between transmit power and rate under different carrier-sensing settings in a two link scenario. Our initial findings indicate there exists a limited number of ratepower combinations that achieve high performance in terms of either throughput and fairness both with and without carrier sensing. Furthermore, in the case of both strong and weak links exist in the network, turning carrier sensing off significantly improves performance.

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Section: B Ieee 80211 Atheros Radio: Bells and Whistlessupporting

confidence: 65%

Section: B Ieee 80211 Atheros Radio: Bells and Whistlesmentioning

confidence: 99%

Section: System Description: Carrier Sensing and Signal Detectionmentioning

confidence: 99%

Section: B Ieee 80211 Atheros Radio: Bells and Whistlesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Joint Transmission Rate, Power, and Carrier Sense Settings: An Initial Measurement Study

Huehn

Merz

Sengul

2010

2010 Fifth IEEE Workshop on Wireless Mesh Networks

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Wireless Local Area Networks

2008

Wireless Broadband Networks

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I would like to express my deep and sincere gratitude to my supervisor, Doctor Ken Duffy. His wide knowledge and his logical way of thinking have been of great value for me. His superhuman patience, encouraging and personal guidance have provided a good basis for this thesis. During my PhD study, the most important thing he taught me is the principle of being scientific. That is 'every idea should come after a strong proof'. All of these are appreciated greatly.I should also send my sincere thanks to my great mentor, Doctor David Malone, who has helped me a lot. Without his help, our simulations and experiments could not run very well. During my PhD study, it was he that taught me so many sparkling ideas in scientific experimentation. Thank you very much.A number of people have made my stay in Ireland an enjoyable experience, especially Professor Douglas Leith. I am grateful to Rosemary Hunt, Kate Moriarty and Ruth Middleton for their willingness to help in all sorts of administrative matters.Finally, I am forever indebted to my parents and my wife for their understanding, endless patience and encouragement when it was most required.Thank you a billion times! xiii

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Bit-Error Analysis in WiFi Networks Based on Real Measurements

Fehér

2011

Access Networks

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On the side-effects of proprietary solutions for fading and interference mitigation in IEEE 802.11b/g outdoor links

Cited by 32 publications

References 14 publications

Joint Transmission Rate, Power, and Carrier Sense Settings: An Initial Measurement Study

Joint Transmission Rate, Power, and Carrier Sense Settings: An Initial Measurement Study

Wireless Local Area Networks

Bit-Error Analysis in WiFi Networks Based on Real Measurements

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