Beam management for new radio vehicle communications

By using SLSS, SL-CSI-RS, or SL-DMRS for initial beamforming and refinement in NR V2X, the challenge of beam-to-link establishment for UEs in NR V2X is solved, achieving efficient beam-to-link establishment and supporting advanced vehicle communication applications.

CN122137435APending Publication Date: 2026-06-02INTERDIGITAL PATENT HOLDINGS INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INTERDIGITAL PATENT HOLDINGS INC
Filing Date
2020-08-12
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

In NR V2X, existing technologies have failed to effectively address the mechanism for UEs to establish their beampair links, especially in NR V2X where PRACH is not supported, posing challenges to beampair link establishment between synchronous source V2X UEs and asynchronous source V2X UEs.

Method used

Initial beamforming and beam refinement are achieved by using SLSS, SL-CSI-RS, or SL-DMRS, combined with beam indexing of SCI, SL-DMRS, or SL-CSI-RS, including beamforming controlled by gNB in ​​the non-connected phase and beamforming controlled by gNB in ​​the connected phase.

Benefits of technology

It enables efficient beampup link establishment in NR V2X, meeting the requirements of high data rates and long communication ranges, and supporting advanced applications in vehicle communication such as sensor and status map sharing, information sharing, and video data sharing.

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Abstract

A user equipment (UE) determines sidelink resources for use in vehicle wireless communications. Initial beam establishment uses a sidelink synchronization signal (SLSS), a sidelink channel state information reference signal (SL-CSI-RS), or a sidelink demodulation reference signal (SL-DMRS). Beam refinement can then be performed by the UEs communicating with each other, or by only one of the UEs. A base station, such as a gNB, can allocate resources for a dedicated sidelink carrier or a shared grant sidelink carrier, for example, dynamically, preconfigured through RRC, or based on activation and deactivation. In such cases, initial beam establishment and refinement can include beamforming controlled by the gNB in a connectionless phase, beamforming controlled by the gNB in a connected phase where scheduling DCI is sent only to the Tx UE, or beamforming controlled by the gNB in a connected phase where scheduling DCI is sent to both the Tx UE and the Rx UE.
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