Patient Mobility Support for Indoor Non-Directed Optical Body Area Networks

Area of Science:

• Biomedical Engineering
• Optical Communications
• Wireless Health Systems

Background:

• Optical Body Area Networks (OBANs) offer a promising solution for wireless transmission of physiological signals in healthcare.
• Existing OBAN systems face challenges in maintaining reliable communication during patient mobility.

Purpose of the Study:

• To propose and evaluate a patient mobility support scheme for indoor non-directed OBANs.
• To enhance the reliability and flexibility of physiological signal transmission from mobile patients.

Main Methods:

• Development of an analytical channel model for non-directed OBANs considering multiple reflections.
• Simulation and experimental validation of the proposed mobility support scheme.
• Evaluation of three coordinator placement scenarios: shoulder, wrist, and combined shoulder-wrist.

Main Results:

• The combined shoulder-wrist placement of the optical coordinator achieved the best performance.
• A bit error rate (BER) of 1.2 × 10^-6 was recorded at a distance of 1.25 m in the optimal scenario.
• The proposed scheme demonstrated reliable performance and added significant mobility freedom for patients.

Conclusions:

• The proposed patient mobility support scheme effectively enhances OBAN performance in indoor healthcare settings.
• Dual-site coordinator placement (shoulder and wrist) significantly improves communication reliability for mobile patients.
• This advancement offers greater patient mobility and reliable physiological monitoring through optical wireless links.