Terminals, wireless communication methods, base stations and systems

The terminal and wireless communication method provide a solution for appropriate DMRS port designation and switching in Rel.18 systems, enhancing communication throughput by using tables and upper-layer signaling for DMRS port identification.

JP7864839B2Active Publication Date: 2026-05-25NTT DOCOMO INC
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
NTT DOCOMO INC
Filing Date
2022-08-10
Publication Date
2026-05-25

AI Technical Summary

Technical Problem

The introduction of Rel.18 DMRS ports in future wireless communication systems has not adequately addressed how to designate and switch between antenna ports, leading to potential improper designation and a decrease in communication throughput.

Method used

A terminal and wireless communication method that includes a first and second table for DMRS port indication, along with upper-layer signaling for switching, and a receiving unit to determine DMRS ports based on Downlink Control Information (DCI) for appropriate DMRS port identification.

Benefits of technology

Enables appropriate identification of DMRS ports, improving communication throughput by addressing the inadequate designation and switching issues in Rel.18 DMRS port systems.

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Abstract

A terminal according to one aspect of the present disclosure comprises: a reception unit that receives downlink control information (DCI) for scheduling an uplink shared channel; and a control unit that selects, on the basis of a specific field of the DCI, an antenna port indication table relating to a demodulation reference signal (DMRS) port indication for the uplink shared channel from among a plurality of tables for a certain rank. According to the one aspect of the present disclosure, it is possible to appropriately determine a DMRS port.
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