Adaptive lcp associated with wtru-autonomous time synchronization with drift detection and network feedback

EP4771909A1Pending Publication Date: 2026-07-08INTERDIGITAL PATENT HOLDINGS INC
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
INTERDIGITAL PATENT HOLDINGS INC
Filing Date
2024-08-28
Publication Date
2026-07-08

AI Technical Summary

Technical Problem

Existing wireless communication systems face challenges in achieving synchronization between dependent Protocol Data Unit (PDU) sets at access Stratum (AS) layers, particularly in managing drifts in flow periodicity and arrival times.

Method used

The system employs an adaptive Logical Channel Prioritization (LCP) mechanism that allows a Wireless Transmit/Receive Unit (WTRU) to receive configuration information from a network node, determining drift size and duration based on flow periodicity and PDU set arrival times. If the drift exceeds specified thresholds, the WTRU applies LCP actions to prioritize logical channels accordingly.

Benefits of technology

This adaptive LCP solution effectively maintains synchronization between dependent PDU sets, ensuring timely data processing and transmission while minimizing the impact of drifts on communication quality.

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Abstract

Systems, methods, and instrumentalities may synchronize dependent Protocol Data Unit (PDU) sets at access Stratum (AS) layers. A Wireless Transmit / Receive Unit (WTRU) may receive configuration information from a network node, indicating one or more of: a logical channel prioritization (LCP) action, maximum duration, drift size threshold, or drift duration threshold. The WTRU may receive an indication of a first PDU set for a first flow, a second PDU set for a second flow, and a dependency between the flows. The WTRU may determine a drift size or a duration based on a flow periodicity and a PDU set arrival time, and apply an LCP action based on the drift size or duration exceeding one or more of the thresholds.
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