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6G • Core Network

Zero-Loss Handover

Predictive Session Buffering & Forwarding

A core network mobility coordination mechanism that pre-buffers and bi-casts user packets to target base stations based on AI mobility predictions.

Technical Explanation

High-frequency Sub-THz and millimeter-wave handovers occur frequently due to small cell footprints. Traditional handover mechanisms tear down the old link before establishing the new one, causing packet gaps and jitter. Zero-Loss Handover uses AI trajectory predictions to identify target base stations seconds in advance. The core user plane proactively bi-casts traffic to both towers and synchronizes sequence numbers, achieving 100% hitless handovers with zero dropped packets.

Key Functions

  • Predictive bi-casting of user data streams to anticipated handover target towers
  • Zero packet loss and zero interruption latency during high-speed cell transitions
  • AI trajectory forecasting predicting exact target micro-cells with >98% accuracy
  • Seamless mobility support for autonomous vehicles and high-speed rail at 500+ km/h
  • Eliminating TCP congestion window resets caused by transient handover packet drops
Specifications
3GPP Rel-19 TS 38.300 Mobility Evolution, ITU-R M.2160
Interfaces
N3-BiCastHandover-Sync-Bus

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