SL HARQ Buffer Management for NR Vehicle Communication

By configuring the Uu LCH constraint parameters and timer management of SL LCH, the problem of unclear HARQ protocol operation in NR V2X communication was solved, and effective HARQ error handling and resource scheduling were achieved, improving transmission efficiency and latency management.

CN114097257BActive Publication Date: 2026-07-03LENOVO (SINGAPORE) PTE LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
LENOVO (SINGAPORE) PTE LTD
Filing Date
2020-07-01
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

In existing NR V2X communication, the HARQ protocol operation does not specify UE behavior, and how to effectively schedule sidelink transmission is still unclear, especially in the case of HARQ feedback errors.

Method used

By configuring the Uu LCH constraint parameters of SL LCH, combined with timer and QoS priority information, the HARQ buffer state is managed to achieve effective HARQ protocol operation, support autonomous HARQ retransmission and buffer refresh, and ensure reasonable resource allocation and transmission scheduling.

Benefits of technology

It enables effective handling of HARQ errors in NR V2X communication, improves transmission efficiency and latency management, and ensures reasonable resource utilization and communication quality under different transmission modes.

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Abstract

Apparatus, methods, and systems for scheduling sidelink transmissions are disclosed. An apparatus 400 includes a processor 405 and a transceiver 425 that receives 805 TB on an SL resource, wherein the TB is associated with an SL HARQ process. The processor 405 stores the TB 810 in a HARQ soft buffer and makes the HARQ soft buffer available for 815 new data in response to a predefined trigger.
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