Systems and techniques for uplink transmission timing with scheduling offsets

EP4515729A1Pending Publication Date: 2025-03-05QUALCOMM INC
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Patent Information

Application Number
EP2023725062
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-04-24
Filing Date
2023-04-25
Publication Date
2025-03-05

AI Technical Summary

Technical Problem

Wireless communication systems face challenges in managing uplink transmission timing due to large propagation time delays between user equipment (UE) and Non-Terrestrial Network (NTN) nodes, particularly when scheduling offsets (Koffset) are updated, leading to ambiguities in using old or new offset values for acknowledgments and other uplink transmissions.

Method used

The systems and techniques determine a selected scheduling offset to use for uplink transmissions based on receiving a downlink transmission, either using the old or updated Koffset value, depending on the activation time of the update relative to the scheduled transmission time, ensuring proper timing alignment with the NTN node.

Benefits of technology

This approach ensures accurate and timely uplink transmissions by selecting the appropriate scheduling offset, resolving ambiguities and maintaining alignment with the NTN node, even with updated Koffset values, thus improving communication efficiency in NTN networks.

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Abstract

Systems and techniques are provided for wireless communications. For example, an apparatus (e.g., a user equipment (UE)) may receive a downlink transmission in a first downlink time slot and receiving an update to a scheduling offset associated with a propagation time delay of communications between the apparatus and a network entity. The update indicates an updated scheduling offset. The apparatus may determine a selected scheduling offset as one of the scheduling offset or the updated scheduling offset. The apparatus may transmit, using a second uplink time slot, an uplink transmission associated with the downlink transmission. The second uplink time slot may be determined based on a first uplink time slot and the selected scheduling offset.
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