Techniques for hyper-frame number (HFN) re-synchronization
HFN resynchronization in wireless communications systems addresses deciphering failures by transmitting HFN indications to UE, reducing service interruptions and overhead through efficient PDU handling and RLC entity management.
WO2026128055A1 Publication Date: 2026-06-18QUALCOMM INC
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- QUALCOMM INC
- Filing Date
- 2025-09-30
- Publication Date
- 2026-06-18
AI Technical Summary
⚠Technical Problem
In wireless communications systems, hyper-frame number (HFN) desynchronization between user equipment (UE) and network entities leads to deciphering failures, resulting in service interruptions and overhead due to bearer release and re-establishment.
⚗Method used
Techniques for HFN resynchronization involve transmitting an indication of the correct HFN to the UE, allowing it to decipher PDUs without releasing bearers, and optionally including both sequence number (SN) and HFN in PDCP data PDUs, along with releasing and re-establishing RLC entities in a disaggregated RAN architecture.
🎯Benefits of technology
This approach reduces service interruptions and overhead by synchronizing HFN without bearer release, ensuring seamless communication and efficient data transmission.
✦ Generated by Eureka AI based on patent content.
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Abstract
Methods, systems, and devices for wireless communications are described. In some cases, a user equipment (UE) may transmit a report indicative of hyper-frame number (HFN) desynchronization between the UE and a network entity. As such, to support HFN resynchronization, the UE may receive, from the network entity, a message indicative of an HFN associated with a packet data unit (PDU), where the UE deciphers the PDU based on the indicated HFN.
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