US-20260128823-A1 - ORTHOGONAL COVER CODE CONFIGURATION BASED ON ASSISTANCE INFORMATION

US20260128823A1US 20260128823 A1US20260128823 A1US 20260128823A1US-20260128823-A1

Abstract

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit, to a network entity, an assistance information message that indicates phase impairment information for the UE, where the phase impairment information is indicative of a change in phase over time. The network entity may select an orthogonal cover code (OCC) configuration (e.g., an OCC scheme and/or OCC factor) based on the indicated phase impairment information for the UE and may indicate the selected OCC configuration to the UE. For example, changes in phase over time at a UE may impact the performance of OCC, and thus the network entity may select an OCC configuration based on the phase impairment at the UE. The UE may perform an uplink shared channel communication using the indicated OCC configuration.

Inventors

Syed Hashim Ali Shah
Alberto RICO ALVARINO

Assignees

QUALCOMM INCORPORATED

Dates

Publication Date: 20260507
Application Date: 20241107

Claims (20)

1 . An apparatus for wireless communication at user equipment (UE), comprising: one or more memories storing processor-executable code; and one or more processors coupled with the one or more memories and configured to cause the UE to: transmit, for a network entity, an assistance information message that indicates phase impairment information for the UE, wherein the phase impairment information is indicative of a change in phase over time; receive, in association with the network entity and based at least in part on transmission of the assistance information message, a control message that indicates an orthogonal cover code configuration, wherein the orthogonal cover code configuration comprises an orthogonal cover code scheme from a set of candidate orthogonal cover code schemes, and wherein the orthogonal cover code configuration comprises an orthogonal cover code factor; and transmit, for the network entity, an uplink shared channel communication in accordance with the orthogonal cover code configuration.
2 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the UE to: receive, from the network entity, a request for the assistance information message, wherein transmission of the assistance information message is based at least in part on the request.
3 . The apparatus of claim 2 , wherein the one or more processors are further configured to cause the UE to: reset an assistance information timer based at least in part on reception of the request, wherein the assistance information timer is associated with trigger of transmission of the assistance information message.
4 . The apparatus of claim 1 , wherein transmission of the assistance information message is based at least in part on an expiration of an assistance information timer associated with trigger of transmission of the assistance information message.
5 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the UE to: detect that a phase impairment condition for the UE exceeds a threshold, wherein transmission of the assistance information message is based at least in part on detection that the phase impairment condition for the UE exceeds the threshold.
6 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the UE to: receive, in association with the network entity, an assistance information transmission periodicity, wherein transmission of the assistance information message is in accordance with the assistance information transmission periodicity.
7 . The apparatus of claim 1 , wherein the orthogonal cover code scheme comprises a slot-wise orthogonal cover code scheme based at least in part on a phase impairment associated with the phase impairment information below a threshold.
8 . The apparatus of claim 1 , wherein the orthogonal cover code scheme comprises a symbol-wise orthogonal cover code scheme based at least in part on a phase impairment associated with the phase impairment information above a threshold.
9 . The apparatus of claim 1 , wherein the orthogonal cover code scheme comprises a sub-physical resource block orthogonal cover code scheme based at least in part on a phase impairment associated with the phase impairment information above a threshold.
10 . The apparatus of claim 1 , wherein the orthogonal cover code scheme comprises a symbol-wise orthogonal cover code scheme, a slot-wise orthogonal cover code scheme, a sub-physical resource block orthogonal cover code scheme, or a combination thereof.
11 . The apparatus of claim 1 , further comprising an antenna, wherein the one or more processors are further configured to cause the UE to: receive, via the antenna and in association with the network entity, one or more reference signals; and calculate, based at least in part on the one or more reference signals, the phase impairment information.
12 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the UE to: transmit, for the network entity after reception of the control message, a second assistance information message that indicates second phase impairment information for the UE, wherein the assistance information message is a first assistance information message, wherein the phase impairment information is a first phase impairment information, wherein the control message is a first control message, wherein the orthogonal cover code configuration is a first orthogonal cover code configuration, wherein the orthogonal cover code scheme is a first orthogonal cover code scheme, wherein the orthogonal cover code factor is a first orthogonal cover code factor, and wherein the second phase impairment information for the UE is different than the first phase impairment information; and receive, in association with the network entity and based at least in part on transmission of the second assistance information message, a second control message that indicates a second orthogonal cover code configuration, wherein the second orthogonal cover code configuration comprises at least one of a second orthogonal cover code scheme different from the first orthogonal cover code scheme or a second orthogonal cover code factor different from the first orthogonal cover code factor.
13 . The apparatus of claim 1 , wherein the phase impairment information is indicative of a phase impairment error in parts per million, a slope of change in temperature of the UE over time, or a slope of change in phase over time.
14 . The apparatus of claim 1 , wherein: the phase impairment information indicates a quantized state from a set of candidate quantized states, and each of the set of candidate quantized states corresponds to a range of phase impairment values.
15 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the UE to: receive, via the control message, scheduling information for the uplink shared channel communication, wherein transmission of the uplink shared channel communication is in accordance with the scheduling information.
16 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the UE to: receive a second control message that comprises scheduling information for the uplink shared channel communication, wherein transmission of the uplink shared channel communication is in accordance with the scheduling information.
17 . The apparatus of claim 1 , wherein the orthogonal cover code configuration further comprises an orthogonal cover code codeword.
18 . The apparatus of claim 1 , wherein the control message is conveyed via one of a downlink control information, radio resource control, or a medium access control (MAC) control element.
19 . An apparatus for wireless communication at network entity, comprising: one or more memories storing processor-executable code; and one or more processors coupled with the one or more memories and configured to cause the network entity to: obtain an assistance information message that indicates phase impairment information for a user equipment (UE), wherein the phase impairment information is indicative of a change in phase over time; output, for the UE and based at least in part on the assistance information message, a control message that indicates an orthogonal cover code configuration, wherein the orthogonal cover code configuration comprises an orthogonal cover code scheme from a set of candidate orthogonal cover code schemes, and wherein the orthogonal cover code configuration comprises an orthogonal cover code factor; and obtain an uplink shared channel communication associated with the UE in accordance with the orthogonal cover code configuration.
20 . The apparatus of claim 19 , wherein the one or more processors are further configured to cause the network entity to: obtain a second assistance information message that indicates second phase impairment information for a second UE, wherein the second phase impairment information is indicative of a second change in phase over time, wherein the assistance information message is a first assistance information message, wherein the phase impairment information is a first phase impairment information, wherein the UE is a first UE, wherein the control message is a first control message, wherein the orthogonal cover code configuration is a first orthogonal cover code configuration, and wherein the uplink shared channel communication is a first uplink shared channel communication; output, for the second UE and based at least in part on the second assistance information message, a second control message that indicates a second orthogonal cover code configuration, wherein the second orthogonal cover code configuration comprises the orthogonal cover code scheme, wherein the second orthogonal cover code configuration comprises the orthogonal cover code factor; and obtain, via a same set of time and frequency resources as the first uplink shared channel communication, a second uplink shared channel communication associated with the second UE in accordance with the second orthogonal cover code configuration.

Description

INTRODUCTION The following relates to wireless communications, including orthogonal cover code configurations for multiplexing transmissions by multiple communication devices. Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communications system may include one or more base stations, each supporting wireless communication for communication devices, which may be known as user equipment (UE). SUMMARY The systems, methods, and devices of this disclosure each have several innovative aspects, no single one of which is solely responsible for the desirable attributes disclosed herein. A method for wireless communications by a user equipment (UE) is described. The method may include transmitting, for a network entity, an assistance information message that indicates phase impairment information for the UE, where the phase impairment information is indicative of a change in phase over time, receiving, in association with the network entity and based on transmission of the assistance information message, a control message that indicates an orthogonal cover code (OCC) configuration, where the OCC configuration includes an OCC scheme from a set of candidate OCC schemes, and where the OCC configuration includes an OCC factor, and transmitting, for the network entity, an uplink shared channel communication in accordance with the OCC configuration. An apparatus for wireless communications at a UE is described. The apparatus may include one or more memories storing processor-executable code; and one or more processors coupled with the one or more memories and configured to cause the UE to transmit, for a network entity, an assistance information message that indicates phase impairment information for the UE, where the phase impairment information is indicative of a change in phase over time, receive, in association with the network entity and based on transmission of the assistance information message, a control message that indicates an OCC configuration, where the OCC configuration includes an OCC scheme from a set of candidate OCC schemes, and where the OCC configuration includes an OCC factor, and transmit, for the network entity, an uplink shared channel communication in accordance with the OCC configuration. Another UE for wireless communications is described. The UE may include means for transmitting, for a network entity, an assistance information message that indicates phase impairment information for the UE, where the phase impairment information is indicative of a change in phase over time, means for receiving, in association with the network entity and based on transmission of the assistance information message, a control message that indicates an OCC configuration, where the OCC configuration includes an OCC scheme from a set of candidate OCC schemes, and where the OCC configuration includes an OCC factor, and means for transmitting, for the network entity, an uplink shared channel communication in accordance with the OCC configuration. A non-transitory computer-readable medium storing code for wireless communications is described. The code may include instructions executable by one or more processors to cause a UE to transmit, for a network entity, an assistance information message that indicates phase impairment information for the UE, where the phase impairment information is indicative of a change in phase over time, receive, in association with the network entity and based on transmission of the assistance information message, a control message that indicates an OCC configuration, where the OCC configuration includes an OCC scheme from a set of candidate OCC schemes, and where the OCC configuration includes an OCC factor, and transmit, for the network entity, an uplink shared channel communication in accordance with the OCC configuration. Some examples of the method, apparatuses, UEs and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, from the network entity, a request for the assistance information message, where transmission of the assistance information message may be based on the r