Demodulation reference signal sharing

By employing rate matching techniques to share DMRS resources across REG bundles, the inefficiency of standalone DMRS transmission is addressed, improving resource utilization, throughput, and reducing latency in wireless communication systems.

WO2026106766A1PCT designated stage Publication Date: 2026-05-21QUALCOMM INC
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
QUALCOMM INC
Filing Date
2025-10-21
Publication Date
2026-05-21

AI Technical Summary

Technical Problem

In wireless communication systems, transmitting only standalone demodulation reference signals (DMRS) in resource element group (REG) bundles without accompanying physical downlink control channel (PDCCH) leads to underutilization of resources, as these resources could otherwise be used for PDCCH transmission.

Method used

Implementing rate matching techniques to efficiently utilize DMRS bundles by sharing DMRS resources across REG bundles, allowing for PDSCH data to be rate matched around DMRS resources that do not include downlink control information (DCI).

Benefits of technology

Enhances resource utilization, reduces network congestion, increases data throughput, and decreases latency by optimizing the use of downlink resources through efficient DMRS sharing and rate matching.

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Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a resource grant for shared demodulation reference signal (DMRS) resources across a control resource set (CORESET) of a physical downlink control channel (PDCCH), wherein the CORESET of the PDCCH overlaps with a portion of a physical downlink shared channel (PDSCH) resource allocation. The UE may receive a DMRS on the shared DMRS resources, wherein a first shared DMRS resource of the shared DMRS resources includes downlink control information (DCI) scheduling a set of PDSCH resources, and wherein data transmitted via the portion of the PDSCH resource allocation is rate matched around the first shared DMRS resource into one or more second shared DMRS resources of the shared DMRS resources based on the one or more second shared DMRS resources not including DCI. Numerous other aspects are described.
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