Reliable Extreme Mobility

Extreme mobility has become a norm rather than an exception. However, 4G and 5G mobility management is not always reliable in extreme mobility. The root cause is that existing mobility management is primarily based on wireless signal strength.

To address this challenge, The Connection Lab has devised REM, Reliable Extreme Mobility, management for 4G, 5G, and beyond. REM shifts to movement-based mobility management in the delay-Doppler domain. Its signaling overlay relaxes feedback via crossband estimation, simplifies policies with provable conflict freedom, and stabilizes signaling via scheduling-based orthogonal time frequency space (OTFS) modulation. Our evaluation with operational high-speed rail datasets shows that REM reduces failures comparable to static and low mobility, with low signaling and latency cost.