Channel aware demodulation reference signal

Inventors: Jacob Pick (Mevaseret Zion, IL); Shay Landis (Hod Hasharon, IL); Peer Berger (Hod Hasharon, IL); Tomer Geva (Kiryat Ono, IL)

Assignee: QUALCOMM Incorporated

H04L5/0051 H04W72/0446 H04W72/0453

View Patent ↗

Loading inventors, assignments & file history…

Monitor This Case

Get email alerts when status or documents change.

Order Certified Copies

Most orders are placed with the USPTO same day — all within 24 business hours.

Order via The Patent Place →

Pre-filled with this patent's details

Quick Facts

Patent No.: US 12695571
App. No.: 18/499,867
Granted: Jul 28, 2026
Kind: B2

External Links

USPTO Patent Center↗ Full Patent PDF↗

Abstract

Certain aspects of the present disclosure provide techniques for channel aware demodulation reference signals (DMRS). An example method, performed at a user equipment (UE), generally includes receiving a message indicating one or more parameters for dynamic DMRS resource allocation, and communicating during one or more periods using DMRS resources dynamically allocated for the one or more periods based on the one or more parameters.

Claims (38)

1 . An apparatus for wireless communication at a user equipment (UE), comprising:

at least one memory comprising computer-executable instructions; and

one or more processors configured to execute the computer-executable instructions and cause the UE to:

receive a message indicating one or more parameters for dynamic demodulation reference signal (DMRS) resource allocation;

dynamically allocate DMRS resources for communicating during one or more periods based on the one or more parameters; and

communicate during the one or more periods using the DMRS resources dynamically allocated for the one or more periods based on the one or more parameters.

2 . The apparatus of claim 1 , wherein the one or more parameters indicate at least one of:

a periodicity for changing the DMRS resource allocation;

a set of possible DMRS configurations, comprising at least one of a set of possible DMRS time configurations, a set of possible DMRS frequency configurations, or a set of possible DMRS time and frequency configurations; or

a default DMRS configuration for a first period of the one or more periods.

3 . The apparatus of claim 2 , wherein the one or more parameters indicate decision rules for time and frequency DMRS allocations.

4 . The apparatus of claim 3 , wherein the one or more processors are further configured to cause the UE to:

measure an average time and frequency correlation for a first period of the one or more periods; and

select, from the set of possible DMRS configurations, a DMRS configuration for a second period of the one or more periods, based on at least one of the average time and frequency correlation or the decision rules.

5 . The apparatus of claim 1 , wherein the one or more parameters comprise at least one of:

a time domain periodicity for changing the DMRS resource allocation;

a frequency domain periodicity for changing the DMRS resource allocation; or

6 . The apparatus of claim 5 , wherein the one or more parameters comprise at least one of:

neural network (NN) coefficients for at least a first NN of a set of NNs;

a set of features for at least the first NN; or

one or more indices associated with at least the first NN.

7 . The apparatus of claim 6 , wherein the one or more processors are further configured to cause the UE to:

calculate features for the first NN for a first period of the one or more periods; and

select, from the set of possible DMRS configurations, a DMRS configuration for a second period of the one or more periods, based on the first NN and the calculated features for the first period.

8 . The apparatus of claim 6 , wherein the first NN generates, as output, time and frequency resources for the dynamic DMRS resource allocation.

9 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the UE to transmit signaling indicating a capability of the UE to support dynamic demodulation reference signal (DMRS) resource allocation, wherein the message is received in response to the signaling.

10 . The apparatus of claim 9 , wherein the message acknowledges the signaling.

11 . The apparatus of claim 9 , wherein the signaling comprises uplink control information (UCI).

12 . The apparatus of claim 1 , wherein the message is received prior to establishment of a radio resource control (RRC) connection with a network entity.

13 . The apparatus of claim 12 , wherein in order to communicate during the one or more periods, the one or more processors are further configured to cause the UE to:

receive DMRS at time and frequency locations determined based on the one or more parameters; and

process data, received from the network entity, in the one or more periods using the received DMRS after establishing the RRC connection with the network entity.

14 . The apparatus of claim 13 , wherein in order to process data, the one or more processors are further configured to cause the UE to perform channel estimation based on the received DMRS.

15 . A method for wireless communication at a user equipment (UE), comprising:

receiving a message indicating one or more parameters for dynamic demodulation reference signal (DMRS) resource allocation;

dynamically allocating DMRS resources for communicating during one or more periods based on the one or more parameters; and

communicating during the one or more periods using the DMRS resources dynamically allocated for the one or more periods based on the one or more parameters.