BioLink: Internet of Body via HBC for Healthcare

Thu, Sep 25 2025

Overview

BioLink is an umbrella research initiative advancing Human Body Communication (HBC) technologies for connected and personalized healthcare. It brings together multiple research projects spanning ultra-low-power HBC transceiver integrated circuits, wearable and implantable sensing systems, physiological-signal monitoring, body-area networking, embedded intelligence, and secure healthcare connectivity.

HBC uses the human body itself as a medium for data exchange between devices placed on, around, or within the body. In contrast to conventional wireless links that radiate radio-frequency signals into the surrounding environment, HBC enables body-centric communication through direct contact with skin or body tissue. This approach can reduce power consumption, limit signal leakage, improve communication reliability, and enhance privacy for sensitive physiological data.

BioLink explores how individual wearable devices—such as wristbands, chest patches, motion sensors, and smart medical nodes—can operate as part of a coordinated Internet-of-Bodies ecosystem. The initiative supports continuous collection and exchange of physiological and movement-related information, including ECG and other EXG signals, heart rate, blood oxygen saturation, temperature, respiration, electrodermal activity, and body motion. These distributed sensing nodes can communicate through the body, enabling cable-free monitoring across multiple body locations.

By combining HBC-based connectivity with compact electronics, local data processing, and secure links to healthcare systems, BioLink aims to create the building blocks for next-generation health-monitoring technologies. The initiative supports research toward more comfortable, energy-efficient, privacy-aware, and scalable solutions for continuous health assessment, remote patient monitoring, rehabilitation, and personalized healthcare.

Research Objectives

BioLink aims to establish a portfolio of integrated research projects that advance HBC-enabled Internet-of-Bodies technologies for healthcare. The initiative focuses on developing the communication hardware, sensing devices, system architectures, and intelligent data-processing methods required for reliable body-centric health monitoring.

Key objectives include:

Develop ultra-low-power HBC electronics: Design compact, energy-efficient hardware systems that combine sensing, HBC communication, processing, power management, and connectivity for wearable, body-mounted, and implantable healthcare devices.
Enable multimodal physiological monitoring: Integrate HBC with sensors for ECG/EXG, inertial motion sensing, heart rate, blood oxygen saturation, temperature, respiration, and skin-based physiological signals to support continuous and comprehensive health assessment.
Create multi-node body-area networks: Enable multiple devices across the body to exchange information without external cables, supporting coordinated sensing among wrist-worn devices, chest-mounted ECG sensors, motion nodes, smart patches, and future implanted medical devices.
Advance intelligent local processing: Explore embedded and edge-based data processing for signal conditioning, feature extraction, health-event detection, and efficient transmission of clinically relevant information.
Improve privacy and security: Investigate communication approaches that retain sensitive health information close to the body and reduce unnecessary radiation or exposure of data to the surrounding environment.
Demonstrate healthcare applications: Validate HBC-enabled systems for continuous cardiac monitoring, activity and motion tracking, rehabilitation, remote patient observation, long-term wellness assessment, and timely clinical intervention.

Research Projects

BioContact Assurance System

The BioContact Assurance System (BCAS) addresses a critical challenge in wearable biomedical monitoring: ensuring reliable contact between sensing electrodes and the skin. Reliable electrode–skin contact is essential for accurate acquisition of ECG, EEG, EMG, and related biosignals, yet conventional lead-off detection approaches can be affected by motion artifacts, environmental noise, and changes in skin-electrode impedance. BCAS uses common-ground Human Body Communication to assess electrode contact in real time. The system transmits predefined digital packets between electrode pairs and analyzes transmission outcomes, including bit-error rate and failed responses, to identify whether an electrode connection is stable, loose, intermittent, or disconnected. This enables a multi-electrode sensing system to locate faulty or degraded connections and maintain more dependable physiological signal acquisition.

SPARK: Social and Personal Adaptive Response Kit

SPARK is a wearable, sensor-based research project focused on detecting and responding to stereotypic repetitive behaviors associated with Autism Spectrum Disorder (ASD). Such behaviors may include hand flapping, rocking, hair twisting, object mouthing, or, in some cases, self-injurious actions such as head banging or self-biting. SPARK integrates wearable sensing, AI-driven behavior recognition, and real-time feedback to identify these events objectively and support timely, personalized intervention. By collecting longitudinal behavioral data, the system aims to learn individual patterns, help interrupt repetitive behavior cycles when appropriate, and provide clinicians, caregivers, and families with actionable insights for individualized care.