Interference avoidance in rapidly deployed wireless ad hoc incident area networks

Refaei, M. Tamer; Souryal, Michael R.; Moayeri, Nader

doi:10.1109/infocom.2008.4544644

Cited by 9 publications

(15 citation statements)

References 8 publications

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“…For example, if the dispenser always maintain "good" communications with at least three breadcrumbs, then the RD is set to be two. Previous works, such as [25], [27], only evaluated the situation in which the RD is zero, however, we argue that the RD must be some positive value to make the breadcrumb system practical in a harsh environment. On the other hand, over engineering the network by applying a very large RD is not desirable.…”

Section: Redundancy Degree Optimizationmentioning

confidence: 76%

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An Automatic, Robust, and Efficient Multi-User Breadcrumb System for Emergency Response Applications

Liu

Xie

et al. 2014

IEEE Trans. on Mobile Comput.

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Abstract-Breadcrumb systems (BCS) aid first responders by communicating their physiological parameters to remotely located base stations. In this paper, we describe the design, implementation, and evaluation of an automatic and robust multi-user breadcrumb system for indoor first response applications. Our solution includes a breadcrumb dispenser with a link estimator that is used to decide when to deploy breadcrumbs to maintain reliable wireless connectivity. The solution includes accounting for realities of buildings and dispensing such as the height difference between where the dispenser is worn and the floor where the dispensed nodes are found. We also include adaptive power management to maintain link quality over time. Moreover, we propose UF, a distributed cooperative deployment algorithm, to achieve longer breadcrumb chain lengths while maintaining fairness and high system reliability via selecting appropriate benefit and cost functions. We deployed and evaluated our system in real buildings with several different first responder mobility patterns. Experimental results from our study show that compared to the state of the art solution [27], our breadcrumb system achieves 200 percent link redundancy with only 23 percent additional deployed nodes. Our deployed breadcrumb chain can achieve 90 percent PRR when one node fails in the chain. In addition, by applying the UF coordination algorithm, the system can maintain connectivity for up to 87 percent longer distances than baseline greedy coordination approach while maintaining 96 percent packet delivery ratio.

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Section: Redundancy Degree Optimizationmentioning

confidence: 76%

“…The system is evaluated by experiments with Mica2 motes and a PDA. Several following works from NIST consider link quality measurements via a SNR based approach [30], interference avoidance [25], and UWB indoor localization techniques [13], [14].…”

Section: Related Workmentioning

confidence: 99%

An Automatic, Robust, and Efficient Multi-User Breadcrumb System for Emergency Response Applications

Liu

Xie

et al. 2014

IEEE Trans. on Mobile Comput.

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“…In [1], authors used cognitive radio technology and identify the vacant channels in order to alleviate the impact of interference. In [2], authors analyzed the strongest interference component by having a Channel State Information (CSI), and by using multiple antennas, apply zero-forcing beam-forming at each receiver for canceling the strongest interferers.…”

Section: Related Workmentioning

confidence: 99%

“…Figure 1 shows an arrangement of nodes such that all parallel Ri have lesser distance from "R" as compared to their Ti and for computation of interference at "R", it is assumed that all parallel Ri are transmitting their frames, (CTS or ACK). Interference at R due to any Ri can be expressed as a function of "a" and α by using equation (1), subject to the condition that signal is more than the sensitivity of the receiver "R", which is assumed to be same for all receivers in the network. Thus, maximum interference at "R" due to parallel receivers which produce a signal > sensitivity level of "R", namely R11 to R16, R21 to R26 and R31 to R36 as shown in figure 1 can be expressed as a function of "a" and α as Maximum I at "R"…”

Section: Computation Of 'Safe-distance'mentioning

confidence: 99%

Modifications in IEEE 802. 11 to Prevent Collisions due to Interference in MANETs

Manocha¹,

Agarwal²,

Srivastava³

2012

IJCA

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“…Furthermore, since small cells and carrier aggregation ability are the features to be supported by upcoming cellular system [12], radio characterization for a wide frequency range will aid in the design and deployment of these wireless networks. With respect to IAN, figuring out PL for various frequency bands can assist in setting up ad hoc network with similar flexibility, which is to select the best available channels to operate at, since interference in one or more channels may occur due to unprecedented events at emergency sites [13]. Hence, this paper provides essential insights of PL to distance relation for several frequency bands in order to facilitate wireless network planning pertaining to the stairwell setting.…”

Section: Introductionmentioning

confidence: 99%

Modelling the Impact of Operating Frequencies on Path Loss and Shadowing Along Multi-Floor Stairwell for 0.7 GHZ-2.5 GHZ Range

Aziz¹,

Rahman²

2014

PIER M

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Abstract-Given that building occupants and more importantly public safety personnel regularly use stairwell to move about different floors in a multi-floor building, wireless network coverage for the setting may come as necessary in order to ensure seamless telecommunication connectivity. Nevertheless, wireless network planning pertaining to multi-floor stairwell scenario requires unique radio characterization since the scenario is different from other indoor environments. This paper presents a frequency dependent path loss and shadowing model for the multi-floor stairwell environment that was developed and tested at six dog-leg style stairwells. The empirical model covers frequency spectrum from 0.7 GHz up to 2.5 GHz which envelop numerous public safety and long term evolution operating bands. The model demonstrates good precision and is shown to outperform standard path loss model when comparison was made since it includes site-specific parameters describing radio characteristics natural to stairwell setting. The straightforward mathematical expression of the model can easily be applied when setting up or studying wireless network for the stipulated frequency range with respect to multi-floor stairwell.

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Interference avoidance in rapidly deployed wireless ad hoc incident area networks

Cited by 9 publications

References 8 publications

An Automatic, Robust, and Efficient Multi-User Breadcrumb System for Emergency Response Applications

An Automatic, Robust, and Efficient Multi-User Breadcrumb System for Emergency Response Applications

Modifications in IEEE 802. 11 to Prevent Collisions due to Interference in MANETs

Modelling the Impact of Operating Frequencies on Path Loss and Shadowing Along Multi-Floor Stairwell for 0.7 GHZ-2.5 GHZ Range

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