DTN routing in body sensor networks with dynamic postural partitioning

Area of Science:

• Computer Science
• Biomedical Engineering
• Wireless Communications

Background:

• Wireless Body Area Networks (WBANs) face challenges due to frequent topological disconnections caused by human posture changes.
• Ultra-short range radio links and unpredictable radio frequency (RF) attenuation further complicate reliable data transmission in WBANs.

Purpose of the Study:

• To develop novel store-and-forward packet routing algorithms for WBANs that account for frequent postural partitioning.
• To characterize on-body topology disconnections and model their impact on routing protocols.

Main Methods:

• A prototype WBAN was built to experimentally measure on-body topology disconnections.
• On-body Delay-Tolerant Networking (DTN) routing protocols were developed using a stochastic link cost formulation.
• Multi-scale modeling of spatio-temporal locality in human postural movements was employed.

Main Results:

• The proposed routing algorithms demonstrated superior performance compared to existing DTN protocols.
• Experimental and simulation evaluations confirmed the effectiveness of the new algorithms.
• The algorithms successfully captured multi-scale topological localities in human postural movements.

Conclusions:

• The developed store-and-forward routing algorithms offer improved performance for WBANs with dynamic topologies.
• Multi-scale modeling of on-body link disconnection patterns is crucial for efficient WBAN routing.
• These findings advance the reliability of data transmission in mobile WBAN applications.