Enabling Communication Technologies for Medical Wireless Body-Area Networks

Haddad, Oussama; Khalighi, Mohammad-Ali

doi:10.1109/glc.2019.8864122

Cited by 25 publications

(24 citation statements)

References 33 publications

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“…These results indicate that, when using a simple modulation technique such as on-off-keying (OOK), the communication channel can be considered as frequency non-selective roughly for data rates up to approximately 5 Mbps (considering a rather loose upper bound of 20 ns for τ 0 ), where no channel equalization is required at the Rx. Given that the data rates in typical intra-WBAN applications are less than 1 Mbps [5], [7], we can effectively neglect the channel delay dispersion in practice.…”

Section: B Delay Spreadmentioning

confidence: 99%

“…Medical WBANs have specific requirements that differentiate them from other networks, including high reliability, low energy consumption, and high data security [5]- [7]. When based on the radio-frequency (RF) technology, they should also ensure a low specific absorption rate (SAR) level, as considered in the IEEE 802.15.6 standard [5], [8].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, RF links are in general more subject to channel time variations due mainly to smallscale fading [9], [10]. These considerations have motivated the investigation of alternative (or complementary) technologies such as optical wireless communications (OWC) for medical WBANs [7]. Here, the main advantages of OWC include their immunity to external interference, not being affected by smallscale (multi-path) fading, as well as their inherent security due to the confinement of light in indoor spaces [6].…”

Section: Introductionmentioning

confidence: 99%

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Channel Characterization and Modeling for Optical Wireless Body-Area Networks

Haddad

Khalighi

Zvánovec

et al. 2020

IEEE Open J. Commun. Soc.

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We address channel characterization and modeling for medical wireless body-area networks (WBANs) based on the optical wireless technology. We focus on the intra-WBAN communication links, i.e., between a set of medical sensors and a coordination node, placed on the patient's body. We consider a realistic mobility model, e.g., inside a hospital room, which takes into account the effect of shadowing due to body parts movements and the variations of the underlying channels. To take into account the global and local user mobility, we consider a dynamic model based on a three-dimensional animation of a walk cycle, as well as walk trajectories based on an improved random way-point mobility model. Then, Monte Carlo ray-tracing simulations are performed to obtain the channel impulse responses for different link configurations at different instants of the walk scenarios. We then derive first-and second-order statistics of the channel parameters such as the channel DC gain, delay spread, and coherence time, and furthermore, propose best fit statistical models to describe the distribution of these parameters for a general scenario.

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Section: B Delay Spreadmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Channel Characterization and Modeling for Optical Wireless Body-Area Networks

Haddad

Khalighi

Zvánovec

et al. 2020

IEEE Open J. Commun. Soc.

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“…Indeed, the already-proposed RF-based solutions rely on transmission in the unlicensed ISM (Industrial, Scientific and Medical) band, which is increasingly subject to EMI. In addition, they are highly vulnerable to data interception and hacking [4].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Optical-CDMA for Uplink Transmission in Medical Extra-WBANs

et al. 2020

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This paper considers the use of infrared wireless communications for uplink transmission in extra wireless body-area networks. We focus on a multiuser medical application, where the collected medical data of several patients inside a hospital room is transmitted to one or several access points (APs). For this uplink transmission, we investigate the performance of optical code-division multiple access in asynchronous mode, while taking into account the effect of random transmitter orientation. For this purpose and to consider realistic scenarios, we implement an orientation-based random waypoint mobility model to consider the mobility of patients inside a hospital ward. Performance evaluation is done in terms of the link average bit-error-rate and outage probability. We further investigate the performance improvement by using several APs, compared with the case of a single AP. INDEX TERMS Wireless body area networks; Medical WBAN; Telemedicine; Wireless optical communications; Infrared data transmission; Optical code-division multiple access; Random waypoint model; Binary pulse-position modulation.

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“…Whereas a number of solutions have been proposed so far based on the radio-frequency (RF) technology mostly in the unlicensed frequency bands, the considerations of electromagnetic interference, data security, and the possible impact of RF waves on the tissues makes optical wireless communications of particular interest within this context. 2,3 We focus in this paper on extra-WBAN uplink communication, i.e., from the CN to the AP, and consider the characterization of the wireless optical channel by estimating the channel impulse response (CIR). An important point here is to take into account user mobility, which can considerably affect the link availability and performance.…”

Section: Introductionmentioning

confidence: 99%

Channel characterization for optical extra-WBAN links considering local and global user mobility

Haddad¹,

Khalighi²,

Zvánovec³

2020

Broadband Access Communication Technologies XIV

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We investigate channel characterization for wireless body-area networks (WBANs) in medical applications using optical signal transmission. More specifically, we focus on uplink communication from a central coordinator node (CN), placed on the patient's body, to an access point (AP) in a typical hospital room, which is usually referred to as extra-WBAN link. Using a ray-tracing based approach, we quantify the main characteristics of the optical channel while considering the effects of body shadowing and mobility (accounting for body movements and user global mobility inside the room). Based on the presented results, we discuss the impact of the positions of the CN and the AP on the link parameters. We also evaluate the link performance based on the outage probability criterion, and further quantify the performance improvement achieved by using multiple APs in the room.

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Enabling Communication Technologies for Medical Wireless Body-Area Networks

Cited by 25 publications

References 33 publications

Channel Characterization and Modeling for Optical Wireless Body-Area Networks

Channel Characterization and Modeling for Optical Wireless Body-Area Networks

Performance Analysis of Optical-CDMA for Uplink Transmission in Medical Extra-WBANs

Channel characterization for optical extra-WBAN links considering local and global user mobility

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