Selecting transmit powers and carrier sense thresholds in CSMA protocols for wireless ad hoc networks

Fuemmeler, J.A.; Vaidya, Nitin H.; Veeravalli, Venugopal V.

doi:10.1145/1234161.1234176

Cited by 59 publications

(64 citation statements)

References 7 publications

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“…Thus keeping the product of PCS threshold and transmit power constant will lead to a sufficient condition for solving hidden terminal problems in this special case, which is consistent with the results in [21]. When interference from others can be ignored, this condition makes the PCS mechanism symmetric, i.e, the two transmitters can both detect each other.…”

Section: Eliminating Packet Loss Due To I2 By Tuning Transmit Powersupporting

confidence: 78%

“…However, the issue of starvation of individual nodes while maximizing throughput was left unaddressed. Recently, [25], found a similar result to [21] for determining sufficient conditions for starvation-free power control. However, both algorithm complexity and control message overhead in this adaptation algorithm are much higher than ours.…”

Section: Related Work Of Spatial Reuse For Hd-wlanmentioning

confidence: 53%

“…Fuemmeler et al [21] [22] showed that the product of the transmit power and the PCS threshold should equal a constant for maximizing spatial reuse.…”

Section: Related Work Of Spatial Reuse For Hd-wlanmentioning

confidence: 99%

“…However, both algorithm complexity and control message overhead in this adaptation algorithm are much higher than ours. Moreover, the most significant difference between this work and [21][25] is that our algorithm provides clear insight into the distinct roles of transmit power and PCS adaptation in balancing throughput gains (maximizing spatial reuse) while avoiding node starvation.…”

Section: Related Work Of Spatial Reuse For Hd-wlanmentioning

confidence: 99%

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Joint transmit power and physical carrier sensing adaptation based on loss differentiation for high density IEEE 802.11 WLAN

Zhu

Roy

et al. 2008

Computer Networks

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In high density (HD) IEEE 802.11 WLAN, packet loss can occur due to co-channel interference (asynchronous interference) or collisions (synchronous interference). In order to effectively mitigate the interference for spatial reuse, the causes of packet loss should be differentiated and corresponding network parameters (Physical Carrier Sensing (PCS) threshold, transmit power (TXPW) and contention windows size) tuned accordingly. Such loss differentiation ability is not supported by current IEEE 802.11 networks; we devised a novel, zero over-the-air overhead, robust yet accurate method of estimating the probability of collision and interference, respectively. In this work, we investigate how to use differentiated Packet Error Rate (PER) to mitigate asynchronous interference for increasing spatial reuse. Motivated by analysis, a joint transmit power and PCS threshold self-adaptation algorithm based on loss differentiation is proposed. Heuristics that address node starvation and fairness are also incorporated within the above (aggregate throughput maximization) framework to allow a flexible suite of approaches to network tuning. Preprint submitted to Elsevier 2 November 2007Elaborate simulations show that such joint adaptation algorithm can increase both total throughput and worst link throughput in HD WLAN greatly compared with PCS only adaptation without loss differentiation.

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Section: Eliminating Packet Loss Due To I2 By Tuning Transmit Powersupporting

confidence: 78%

Section: Related Work Of Spatial Reuse For Hd-wlanmentioning

confidence: 53%

“…Fuemmeler et al [21] [22] showed that the product of the transmit power and the PCS threshold should equal a constant for maximizing spatial reuse.…”

Section: Related Work Of Spatial Reuse For Hd-wlanmentioning

confidence: 99%

Section: Related Work Of Spatial Reuse For Hd-wlanmentioning

confidence: 99%

See 2 more Smart Citations

Joint transmit power and physical carrier sensing adaptation based on loss differentiation for high density IEEE 802.11 WLAN

Zhu

Roy

et al. 2008

Computer Networks

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“…For instance, in [6], dynamic transmit rate control and carrier sensing is shown to be advantageous, while [22] concludes that the product of transmit power and carrier sense threshold should be a fixed constant (i.e., should be changed at the same time). In [7], passive measurements of channel busy time are used to perform rate adaptation under congestion.…”

Section: Related Workmentioning

confidence: 99%

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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RFID reader collision problem: performance analysis and medium access

Yoon¹,

Vaidya²

2012

Wireless Communications

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The RFID reader collision problem, in which an RFID reader's interrogation is interfered by other concurrent readers' transmission, is considered an important issue to reliable operation and thus to the wide‐spread deployment of RFID networks. In this paper, we present modeling and analysis of the RFID reader collision problem. We observe asymmetry between an RFID reader's and a tag's communication capabilities and develop an RFID radio model based on the asymmetry. By the model, we characterize the spatial reuse of RFID reader networks, and derive concurrent interrogation distance beyond which readers can transmit simultaneously without causing collision and the carrier sense threshold corresponding to the distance. We also examine the dual‐channel mode where available bandwidth is divided into two channels by which reader‐to‐tag communication and tag‐to‐reader communication are separated. We analyze and evaluate the performance of the dual‐channel mode in terms of spatial reuse and interrogation completion time. Copyright © 2010 John Wiley & Sons, Ltd.

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Selecting transmit powers and carrier sense thresholds in CSMA protocols for wireless ad hoc networks

Cited by 59 publications

References 7 publications

Joint transmit power and physical carrier sensing adaptation based on loss differentiation for high density IEEE 802.11 WLAN

Joint transmit power and physical carrier sensing adaptation based on loss differentiation for high density IEEE 802.11 WLAN

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

RFID reader collision problem: performance analysis and medium access

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