Real-time communications using TDMA-based multi-access protocol

Simonot, F.; Song, Yang

doi:10.1016/s0140-3664(97)00045-5

Cited by 5 publications

(2 citation statements)

References 26 publications

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“…Coordination among nodes was achieved by the TDMA (Time Domain Multiple Access) methodology [19][20][21]. In TDMA, a certain RF channel is allocated for the access of one master and N slaves.…”

Section: Data Transmissionmentioning

confidence: 99%

SeisMote: A Multi-Sensor Wireless Platform for Cardiovascular Monitoring in Laboratory, Daily Life, and Telemedicine

Rienzo

Rizzo

Işılay

et al. 2020

Sensors

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This article presents a new wearable platform, SeisMote, for the monitoring of cardiovascular function in controlled conditions and daily life. It consists of a wireless network of sensorized nodes providing simultaneous multiple measures of electrocardiogram (ECG), acceleration, rotational velocity, and photoplethysmogram (PPG) from different body areas. A custom low-power transmission protocol was developed to allow the concomitant real-time monitoring of 32 signals (16 bit @200 Hz) from up to 12 nodes with a jitter in the among-node time synchronization lower than 0.2 ms. The BluetoothLE protocol may be used when only a single node is needed. Data can also be collected in the off-line mode. Seismocardiogram and pulse transit times can be derived from the collected data to obtain additional information on cardiac mechanics and vascular characteristics. The employment of the system in the field showed recordings without data gaps caused by transmission errors, and the duration of each battery charge exceeded 16 h. The system is currently used to investigate strategies of hemodynamic regulation in different vascular districts (through a multisite assessment of ECG and PPG) and to study the propagation of precordial vibrations along the thorax. The single-node version is presently exploited to monitor cardiac patients during telerehabilitation.

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Section: Data Transmissionmentioning

confidence: 99%

SeisMote: A Multi-Sensor Wireless Platform for Cardiovascular Monitoring in Laboratory, Daily Life, and Telemedicine

Rienzo

Rizzo

Işılay

et al. 2020

Sensors

View full text Add to dashboard Cite

show abstract

“…LAS sends PT for aperiodic messages only within Aperiodic Window (AW), whose transfer capability varies in different instants and is related to the content in the corresponding Periodic Window (PW) [11]. Therefore, to calculate the transfer capability, the content of periodic window, the schedule of periodic messages, which is determined by the arrival pattern of periodic messages, must be considered.…”

Section: Transfer Capability Of Aperiodic Window (Aw)mentioning

confidence: 99%