Communication method and apparatus

By increasing the number of DMRS ports in the CDM group, the interference problem caused by excessive DMRS port demand is solved, the accuracy of channel estimation and data transmission performance are improved, and it is suitable for frequency-domain sparse DMRS patterns and inter-cell frequency division scenarios.

WO2026026089A1PCT designated stage Publication Date: 2026-02-05HUAWEI TECH CO LTD
View PDF 4 Cites 0 Cited by

Patent Information

Application Number
PCT/CN2025/093137
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-07-31
Filing Date
2025-05-07
Publication Date
2026-02-05

AI Technical Summary

Technical Problem

In some communication scenarios, the DMRS port requirement exceeds the number of ports defined in the existing CDM group, leading to mutual interference between multiple data streams, reducing the accuracy of channel estimation, and affecting data transmission performance.

Method used

By increasing the number of DMRS ports supported in a CDM group, the number of ports within each CDM group under a frequency-domain sparse DMRS pattern is increased, mutual interference between DMRS transmissions is reduced, and the accuracy of channel estimation is improved.

Benefits of technology

It meets the DMRS port requirements of more communication transmission scenarios, improves data transmission performance, and is suitable for DMRS frequency division scenarios between cells. It can meet the DMRS transmission needs of more users or streams through more ports.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN2025093137_05022026_PF_FP_ABST
    Figure CN2025093137_05022026_PF_FP_ABST
Patent Text Reader

Abstract

A communication method and apparatus. Increasing the number of ports comprised in each CDM group in a sparse DMRS configuration can decrease mutual interference between DMRSs, thereby enabling applicability to more communication transmission scenarios. The method comprises: on the basis of DMRS indication information and a first DMRS configuration, a DMRS receiving end device using a first DMRS to perform transmission at a first time-frequency resource location, wherein the first DMRS is obtained on the basis of a DMRS value, the DMRS indication information is used for indicating mapping of a DMRS to the first time-frequency resource location and the DMRS value at the first time-frequency resource location, and the first DMRS configuration comprises more than three CDM groups, each CDM group comprises N DMRS ports, and when the number of symbols for the DMRS is single-symbol, N≥4, or when the number of symbols for the DMRS is double-symbol, N≥8.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • DMRS port transmission configuration indication method and device

    CN111786754A

  • Systems and methods for DMRS port configuration and indication

    US20240243875A1

  • Communication method and apparatus

    WO2023125761A1

  • Wireless communication method, terminal device, and network device

    WO2023197154A1