EP4666419A1

EP4666419A1 - Overhead reduction for complementary confidence level reporting in beam predictions

Info

Publication number: EP4666419A1
Application number: EP23710196.9A
Authority: EP
Inventors: Qiaoyu Li; Mahmoud Taherzadeh Boroujeni; Mohamed Fouad Ahmed Marzban; Hamed Pezeshki
Original assignee: Qualcomm Inc
Current assignee: Qualcomm Inc
Priority date: 2023-02-16
Filing date: 2023-02-16
Publication date: 2025-12-24
Also published as: WO2024168674A1; CN120814183A

Abstract

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may monitor channel measurement resources (CMRs) to generate channel predictions and may generate confidence values for those channel predictions. The UE may then indicate in a first channel state information (CSI) report which subset of predictions are associated with confidence values that the UE will subsequently report. The UE may then report the specific indicated confidence values for a subset of predictions in a second triggered CSI report. In some examples, as described herein, the UE may transmit indications of the confidence values for one or more predictions where the confidence values do not satisfy a threshold, if a quantity of observed instances of confidence levels that are lower than the threshold during a duration satisfy a report triggering criterion. The network may configure such thresholds.

Description

OVERHEAD REDUCTION FOR COMPLEMENTARY CONFIDENCE LEVEL REPORTING IN BEAM PREDICTIONS

FIELD OF TECHNOLOGY
The following relates to wireless communications, including overhead reduction for complementary confidence level reporting in beam predictions.

BACKGROUND

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 described techniques relate to improved methods, systems, devices, and apparatuses that support overhead reduction for complementary confidence level reporting in beam predictions. For example, as described herein, a user equipment (UE) may monitor channel measurement resources (CMRs) to generate channel predictions and may generate confidence values for those channel predictions. The UE may then indicate in a first channel state information (CSI) report which subset of predictions are associated with confidence values that the UE will subsequently report (e.g., which subset of confidence values do not satisfy a threshold, instead of a binary indication of whether the UE will report all or no confidence values) . The UE may then report the specific indicated confidence values for a subset of predictions in a second triggered CSI report. In some examples, as described herein, the UE may transmit indications of the confidence values for one or more predictions where the confidence values do not satisfy a threshold, if a quantity of observed instances of confidence levels that are lower than the threshold during a duration satisfy a report triggering criterion. The network may configure such thresholds.
A method for wireless communications at a user equipment (UE) is described. The method may include receiving one or more reference signals from a network entity via a set of multiple resources for predicting channel quality, transmitting a first channel state information report indicating a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources, the first channel state information report including a confidence level feedback request based on one or more confidence values for a subset of the set of multiple predicted channel quality values failing to satisfy a threshold, receiving a trigger for a second channel state information report based on the confidence level feedback request, and transmitting, based on receiving the trigger, the second channel state information report indicating the one or more confidence values for the subset of the set of multiple predicted channel quality values.
An apparatus for wireless communications at a UE is described. The apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to receive one or more reference signals from a network entity via a set of multiple resources for predicting channel quality, transmit a first channel state information report indicating a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources, the first channel state information report including a confidence level feedback request based on one or more confidence values for a subset of the set of multiple predicted channel quality values failing to satisfy a threshold, receive a trigger for a second channel state information report based on the confidence level feedback request, and transmit, based on receiving the trigger, the second channel state information report indicating the one or more confidence values for the subset of the set of multiple predicted channel quality values.
Another apparatus for wireless communications at a UE is described. The apparatus may include means for receiving one or more reference signals from a network entity via a set of multiple resources for predicting channel quality, means for transmitting a first channel state information report indicating a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources, the first channel state information report including a confidence level feedback request based on one or more confidence values for a subset of the set of multiple predicted channel quality values failing to satisfy a threshold, means for receiving a trigger for a second channel state information report based on the confidence level feedback request, and means for transmitting, based on receiving the trigger, the second channel state information report indicating the one or more confidence values for the subset of the set of multiple predicted channel quality values.
A non-transitory computer-readable medium storing code for wireless communications at a UE is described. The code may include instructions executable by a processor to receive one or more reference signals from a network entity via a set of multiple resources for predicting channel quality, transmit a first channel state information report indicating a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources, the first channel state information report including a confidence level feedback request based on one or more confidence values for a subset of the set of multiple predicted channel quality values failing to satisfy a threshold, receive a trigger for a second channel state information report based on the confidence level feedback request, and transmit, based on receiving the trigger, the second channel state information report indicating the one or more confidence values for the subset of the set of multiple predicted channel quality values.
Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, via the second channel state information report, a set of resource identifiers corresponding to the subset of the set of multiple predicted channel quality values, each of the one or more confidence values corresponding to a respective resource identifier of the set of resource identifiers.
Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, via the first channel state information report, the confidence level feedback request including a multi-bit indicator, the multi-bit indicator indicating a quantity of confidence values corresponding to the subset of the set of multiple predicted channel quality values.
In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the multi-bit indicator indicates a quantity of predicted channel quality values corresponding to the subset of the set of multiple predicted channel quality values.
In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, each bit of the multi-bit indicator may be associated with one of the set of multiple predicted channel quality values.
Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting the first channel state information report including the confidence level feedback request based on a quantity of one or more highest predicted channel quality values of the set of multiple predicted channel quality values being associated with respective confidence values failing to satisfy the threshold.
In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, transmitting the second channel state information report may include operations, features, means, or instructions for transmitting the second channel state information report indicating the one or more confidence values based on a quantity of one or more highest predicted channel quality values of the set of multiple predicted channel quality values being associated with respective confidence values failing to satisfy the threshold.
A method for wireless communications at a UE is described. The method may include receiving one or more reference signals from a network entity via a set of multiple resources for predicting channel quality, generating a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources during a time window, where one or more confidence values for a subset of the set of multiple predicted channel quality values fail to satisfy a threshold, and transmitting a channel state information report indicating the one or more confidence values associated with one or more respective resources of the set of multiple resources based on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion.
An apparatus for wireless communications at a UE is described. The apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to receive one or more reference signals from a network entity via a set of multiple resources for predicting channel quality, generate a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources during a time window, where one or more confidence values for a subset of the set of multiple predicted channel quality values fail to satisfy a threshold, and transmit a channel state information report indicating the one or more confidence values associated with one or more respective resources of the set of multiple resources based on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion.
Another apparatus for wireless communications at a UE is described. The apparatus may include means for receiving one or more reference signals from a network entity via a set of multiple resources for predicting channel quality, means for generating a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources during a time window, where one or more confidence values for a subset of the set of multiple predicted channel quality values fail to satisfy a threshold, and means for transmitting a channel state information report indicating the one or more confidence values associated with one or more respective resources of the set of multiple resources based on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion.
A non-transitory computer-readable medium storing code for wireless communications at a UE is described. The code may include instructions executable by a processor to receive one or more reference signals from a network entity via a set of multiple resources for predicting channel quality, generate a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources during a time window, where one or more confidence values for a subset of the set of multiple predicted channel quality values fail to satisfy a threshold, and transmit a channel state information report indicating the one or more confidence values associated with one or more respective resources of the set of multiple resources based on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion.
Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, based on the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying the report triggering criterion, a first channel state information report indicating the set of multiple predicted channel quality values and a confidence level feedback request and receiving, based on the confidence level feedback request, a trigger for a second channel state information report, where the second channel state information report includes the channel state information report indicating the one or more confidence values.
Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting the channel state information report indicating the one or more confidence values may be based on receiving the trigger.
In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, transmitting the channel state information report may include operations, features, means, or instructions for transmitting, based on the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying the report triggering criterion, the channel state information report indicating the set of multiple predicted channel quality values, the one or more confidence values, and a set of resource identifiers corresponding to the one or more respective resources of the set of multiple resources.
Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving control signaling including an indication of the threshold, the report triggering criterion, or both.
In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, receiving the control signaling may include operations, features, means, or instructions for receiving first control signaling including an indication of a set of candidate threshold values, a set of candidate report triggering criteria, or both and receiving second control signaling indicating a threshold value of the set of candidate threshold values for the threshold, the report triggering criterion of the set of candidate report triggering criteria, or both.
In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, receiving the control signaling may include operations, features, means, or instructions for receiving first control signaling including a default threshold value, a default report triggering criterion, or both and receiving second control signaling updating the default threshold value to the threshold, the default report triggering criterion, or both.
Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, via the control signaling, an indication of a serving cell, a bandwidth part, a channel state information reporting configuration, or a combination thereof, corresponding to the threshold, the report triggering criterion, or both.
Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for setting a timer associated with the time window and resetting the timer upon determining that the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfy the report triggering criterion prior to or upon expiration of the timer.
Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for resetting the timer upon determining that a second quantity of an additional one or more confidence values fails to satisfy the threshold upon expiration of the timer and refraining from transmitting an additional channel state information report indicating confidence values for the second quantity of the additional one or more confidence values.
Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting a confidence level feedback request based on a quantity of one or more highest predicted channel quality values of the set of multiple predicted channel quality values being associated with respective confidence values failing to satisfy the threshold, where the channel state information report may be transmitted in response to receiving a trigger for the channel state information report.
In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, transmitting the channel state information report may include operations, features, means, or instructions for transmitting the channel state information report indicating the one or more confidence values based on a quantity of one or more highest predicted channel quality values of the set of multiple predicted channel quality values being associated with respective confidence values failing to satisfy the threshold.
A method for wireless communications at a network entity is described. The method may include transmitting one or more reference signals to a UE via a set of multiple resources for predicting channel quality, receiving a first channel state information report indicating a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources, the first channel state information report including a confidence level feedback request based on one or more confidence values for a subset of the set of multiple predicted channel quality values failing to satisfy a threshold, transmitting a trigger for a second channel state information report based on the confidence level feedback request, and receiving, based on receiving the trigger, the second channel state information report indicating the one or more confidence values for the subset of the set of multiple predicted channel quality values.
An apparatus for wireless communications at a network entity is described. The apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to transmit one or more reference signals to a UE via a set of multiple resources for predicting channel quality, receive a first channel state information report indicating a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources, the first channel state information report including a confidence level feedback request based on one or more confidence values for a subset of the set of multiple predicted channel quality values failing to satisfy a threshold, transmit a trigger for a second channel state information report based on the confidence level feedback request, and receive, based on receiving the trigger, the second channel state information report indicating the one or more confidence values for the subset of the set of multiple predicted channel quality values.
Another apparatus for wireless communications at a network entity is described. The apparatus may include means for transmitting one or more reference signals to a UE via a set of multiple resources for predicting channel quality, means for receiving a first channel state information report indicating a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources, the first channel state information report including a confidence level feedback request based on one or more confidence values for a subset of the set of multiple predicted channel quality values failing to satisfy a threshold, means for transmitting a trigger for a second channel state information report based on the confidence level feedback request, and means for receiving, based on receiving the trigger, the second channel state information report indicating the one or more confidence values for the subset of the set of multiple predicted channel quality values.
A non-transitory computer-readable medium storing code for wireless communications at a network entity is described. The code may include instructions executable by a processor to transmit one or more reference signals to a UE via a set of multiple resources for predicting channel quality, receive a first channel state information report indicating a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources, the first channel state information report including a confidence level feedback request based on one or more confidence values for a subset of the set of multiple predicted channel quality values failing to satisfy a threshold, transmit a trigger for a second channel state information report based on the confidence level feedback request, and receive, based on receiving the trigger, the second channel state information report indicating the one or more confidence values for the subset of the set of multiple predicted channel quality values.
Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, via the second channel state information report, a set of resource identifiers corresponding to the subset of the set of multiple predicted channel quality values, each of the one or more confidence values corresponding to a respective resource identifier of the set of resource identifiers.
Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, via the first channel state information report, the confidence level feedback request including a multi-bit indicator, the multi-bit indicator indicating a quantity of confidence values corresponding to the subset of the set of multiple predicted channel quality values.
In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the multi-bit indicator indicates a quantity of predicted channel quality values corresponding to the subset of the set of multiple predicted channel quality values.
In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, each bit of the multi-bit indicator may be associated with one of the set of multiple predicted channel quality values.
In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, receiving the first channel state information report may include operations, features, means, or instructions for receiving the first channel state information report including the confidence level feedback request based on a quantity of one or more highest predicted channel quality values of the set of multiple predicted channel quality values being associated with respective confidence values failing to satisfy the threshold.
A method for wireless communications at a network entity is described. The method may include transmitting one or more reference signals from a network entity via a set of multiple resources for predicting channel quality during a time window and receiving a channel state information report indicating one or more confidence values for a set of multiple predicted channel quality values corresponding to respective resources of a set of multiple resources, where the one or more confidence values are for a subset of the set of multiple predicted channel quality values that fail to satisfy a threshold, and where receiving the channel state information report is based on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion.
An apparatus for wireless communications at a network entity is described. The apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to transmit one or more reference signals from a network entity via a set of multiple resources for predicting channel quality during a time window and receive a channel state information report indicating one or more confidence values for a set of multiple predicted channel quality values corresponding to respective resources of a set of multiple resources, where the one or more confidence values are for a subset of the set of multiple predicted channel quality values that fail to satisfy a threshold, and where receiving the channel state information report is based on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion.
Another apparatus for wireless communications at a network entity is described. The apparatus may include means for transmitting one or more reference signals from a network entity via a set of multiple resources for predicting channel quality during a time window and means for receiving a channel state information report indicating one or more confidence values for a set of multiple predicted channel quality values corresponding to respective resources of a set of multiple resources, where the one or more confidence values are for a subset of the set of multiple predicted channel quality values that fail to satisfy a threshold, and where receiving the channel state information report is based on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion.
A non-transitory computer-readable medium storing code for wireless communications at a network entity is described. The code may include instructions executable by a processor to transmit one or more reference signals from a network entity via a set of multiple resources for predicting channel quality during a time window and receive a channel state information report indicating one or more confidence values for a set of multiple predicted channel quality values corresponding to respective resources of a set of multiple resources, where the one or more confidence values are for a subset of the set of multiple predicted channel quality values that fail to satisfy a threshold, and where receiving the channel state information report is based on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion.
Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, based on the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying the report triggering criterion, a first channel state information report indicating the set of multiple predicted channel quality values and a confidence level feedback request and transmitting, based on the confidence level feedback request, a trigger for a second channel state information report, where the second channel state information report includes the channel state information report indicating the one or more confidence values.
In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, receiving the channel state information report may include operations, features, means, or instructions for receiving, based on the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying the report triggering criterion, the channel state information report indicating the set of multiple predicted channel quality values, the one or more confidence values, and a set of resource identifiers corresponding to the one or more respective resources of the set of multiple resources.
Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting control signaling including an indication of the threshold, the report triggering criterion, or both.
Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving a confidence level feedback request based on a quantity of one or more highest predicted channel quality values of the set of multiple predicted channel quality values being associated with respective confidence values failing to satisfy the threshold, where the channel state information report may be received in response to transmitting a trigger for the channel state information report.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an example of a wireless communications system that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure.
FIG. 2 illustrates an example of a wireless communications system that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure.
FIG. 3 illustrates an example of a channel measurement scheme that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure.
FIG. 4 illustrates an example of a confidence level reporting scheme that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure.
FIG. 5 illustrates an example of a confidence level reporting scheme that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure.
FIG. 6 illustrates an example of a timeline that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure.
FIG. 7 illustrates an example of a confidence level reporting scheme that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure.
FIG. 8 illustrates an example of a process flow that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure.
FIG. 9 illustrates an example of a process flow that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure.
FIGs. 10 and 11 illustrate block diagrams of devices that support overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure.
FIG. 12 illustrates a block diagram of a communications manager that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure.
FIG. 13 illustrates a diagram of a system including a device that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure.
FIGs. 14 and 15 illustrate block diagrams of devices that support overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure.
FIG. 16 illustrates a block diagram of a communications manager that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure.
FIG. 17 illustrates a diagram of a system including a device that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure.

DETAILED DESCRIPTION

A user equipment (UE) may perform channel measurements via one or more configured resources and report channel state information (CSI) to the network for each of the resources. In some cases, the UE may also generate confidence values for reported CSI measurements. For instance, the UE may indicate in a first CSI report that it has generated confidence values for some of the CSI measurements (e.g., for specific channel measurement resources (CMRs) , or that the generated confidence values for CMRs satisfies some threshold (e.g., the confidence value is high enough or low enough to be meaningful to the network) . If the UE indicates reportable confidence values in the first CSI report, the network may trigger a second (e.g., aperiodic) CSI report for reporting the confidence values. However, some wireless communications systems may not allow for the possibility that some confidence values may be reportable, and other confidence values may not be valuable (e.g., may be below a threshold, or may be negligible) . Instead, the UE can only report (e.g., via a single bit) whether it will report all confidence values, or no confidence values. In the case where only some confidence values are meaningful (e.g., satisfy a threshold) , the UE may have to report all confidence values (e.g., resulting in an unnecessary increase in signaling overhead for reporting confidence values that do not satisfy the threshold) , or refraining from reporting any confidence values (e.g., resulting in a lack of information that the network could utilize to more effectively determine modulation and coding schemes (MCS) , perform channel selection, etc. ) .
In some examples, as described herein, a UE may monitor CMRs to generate channel predictions and may generate confidence values for those channel predictions. The UE may then indicate in a first CSI report which subset of predictions are associated with confidence values that the UE will subsequently report (e.g., which subset of confidence values do not satisfy a threshold, instead of a binary indication of whether the UE will report all or no confidence values) . The UE may then report the specific indicated confidence values for a subset of predictions in a second triggered CSI report.
In some examples, as described herein, the UE may transmit indications of the confidence values for one or more predictions where the confidence values do not satisfy a threshold, if a quantity of observed instances of confidence levels that are lower than the threshold during a duration satisfy a report triggering criterion (e.g., if more than X observed instances of the confidence levels are lower than the threshold occur during a duration of Y ms, the UE will autonomously include the confidence levels in the CSI report, or will request a second CSI report for reporting the confidence levels per the first proposal) . The network may configure X and Y.
Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are further illustrated by and described with reference to wireless communications systems, channel measurement schemes, confidence level reporting schemes, timelines, and process flows. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to overhead reduction for complementary confidence level reporting in beam predictions.
FIG. 1 illustrates an example of a wireless communications system 100 that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure. The wireless communications system 100 may include one or more network entities 105, one or more UEs 115, and a core network 130. In some examples, the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, a New Radio (NR) network, or a network operating in accordance with other systems and radio technologies, including future systems and radio technologies not explicitly mentioned herein.
The network entities 105 may be dispersed throughout a geographic area to form the wireless communications system 100 and may include devices in different forms or having different capabilities. In various examples, a network entity 105 may be referred to as a network element, a mobility element, a radio access network (RAN) node, or network equipment, among other nomenclature. In some examples, network entities 105 and UEs 115 may wirelessly communicate via one or more communication links 125 (e.g., a radio frequency (RF) access link) . For example, a network entity 105 may support a coverage area 110 (e.g., a geographic coverage area) over which the UEs 115 and the network entity 105 may establish one or more communication links 125. The coverage area 110 may be an example of a geographic area over which a network entity 105 and a UE 115 may support the communication of signals according to one or more radio access technologies (RATs) .
The UEs 115 may be dispersed throughout a coverage area 110 of the wireless communications system 100, and each UE 115 may be stationary, or mobile, or both at different times. The UEs 115 may be devices in different forms or having different capabilities. Some example UEs 115 are illustrated in FIG. 1. The UEs 115 described herein may be capable of supporting communications with various types of devices, such as other UEs 115 or network entities 105, as shown in FIG. 1.
As described herein, a node of the wireless communications system 100, which may be referred to as a network node, or a wireless node, may be a network entity 105 (e.g., any network entity described herein) , a UE 115 (e.g., any UE described herein) , a network controller, an apparatus, a device, a computing system, one or more components, or another suitable processing entity configured to perform any of the techniques described herein. For example, a node may be a UE 115. As another example, a node may be a network entity 105. As another example, a first node may be configured to communicate with a second node or a third node. In one aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a UE 115. In another aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a network entity 105. In yet other aspects of this example, the first, second, and third nodes may be different relative to these examples. Similarly, reference to a UE 115, network entity 105, apparatus, device, computing system, or the like may include disclosure of the UE 115, network entity 105, apparatus, device, computing system, or the like being a node. For example, disclosure that a UE 115 is configured to receive information from a network entity 105 also discloses that a first node is configured to receive information from a second node.
In some examples, network entities 105 may communicate with the core network 130, or with one another, or both. For example, network entities 105 may communicate with the core network 130 via one or more backhaul communication links 120 (e.g., in accordance with an S1, N2, N3, or other interface protocol) . In some examples, network entities 105 may communicate with one another via a backhaul communication link 120 (e.g., in accordance with an X2, Xn, or other interface protocol) either directly (e.g., directly between network entities 105) or indirectly (e.g., via a core network 130) . In some examples, network entities 105 may communicate with one another via a midhaul communication link 162 (e.g., in accordance with a midhaul interface protocol) or a fronthaul communication link 168 (e.g., in accordance with a fronthaul interface protocol) , or any combination thereof. The backhaul communication links 120, midhaul communication links 162, or fronthaul communication links 168 may be or include one or more wired links (e.g., an electrical link, an optical fiber link) , one or more wireless links (e.g., a radio link, a wireless optical link) , among other examples or various combinations thereof. A UE 115 may communicate with the core network 130 via a communication link 155.
One or more of the network entities 105 described herein may include or may be referred to as a base station 140 (e.g., a base transceiver station, a radio base station, an NR base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation NodeB or a giga-NodeB (either of which may be referred to as a gNB) , a 5G NB, a next-generation eNB (ng-eNB) , a Home NodeB, a Home eNodeB, or other suitable terminology) . In some examples, a network entity 105 (e.g., a base station 140) may be implemented in an aggregated (e.g., monolithic, standalone) base station architecture, which may be configured to utilize a protocol stack that is physically or logically integrated within a single network entity 105 (e.g., a single RAN node, such as a base station 140) .
In some examples, a network entity 105 may be implemented in a disaggregated architecture (e.g., a disaggregated base station architecture, a disaggregated RAN architecture) , which may be configured to utilize a protocol stack that is physically or logically distributed among two or more network entities 105, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance) , or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN) ) . For example, a network entity 105 may include one or more of a central unit (CU) 160, a distributed unit (DU) 165, a radio unit (RU) 170, a RAN Intelligent Controller (RIC) 175 (e.g., a Near-Real Time RIC (Near-RT RIC) , a Non-Real Time RIC (Non-RT RIC) ) , a Service Management and Orchestration (SMO) 180 system, or any combination thereof. An RU 170 may also be referred to as a radio head, a smart radio head, a remote radio head (RRH) , a remote radio unit (RRU) , or a transmission reception point (TRP) . One or more components of the network entities 105 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 105 may be located in distributed locations (e.g., separate physical locations) . In some examples, one or more network entities 105 of a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU) , a virtual DU (VDU) , a virtual RU (VRU) ) .
The split of functionality between a CU 160, a DU 165, and an RU 170 is flexible and may support different functionalities depending on which functions (e.g., network layer functions, protocol layer functions, baseband functions, RF functions, and any combinations thereof) are performed at a CU 160, a DU 165, or an RU 170. For example, a functional split of a protocol stack may be employed between a CU 160 and a DU 165 such that the CU 160 may support one or more layers of the protocol stack and the DU 165 may support one or more different layers of the protocol stack. In some examples, the CU 160 may host upper protocol layer (e.g., layer 3 (L3) , layer 2 (L2) ) functionality and signaling (e.g., Radio Resource Control (RRC) , service data adaption protocol (SDAP) , Packet Data Convergence Protocol (PDCP) ) . The CU 160 may be connected to one or more DUs 165 or RUs 170, and the one or more DUs 165 or RUs 170 may host lower protocol layers, such as layer 1 (L1) (e.g., physical (PHY) layer) or L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU 160. Additionally, or alternatively, a functional split of the protocol stack may be employed between a DU 165 and an RU 170 such that the DU 165 may support one or more layers of the protocol stack and the RU 170 may support one or more different layers of the protocol stack. The DU 165 may support one or multiple different cells (e.g., via one or more RUs 170) . In some cases, a functional split between a CU 160 and a DU 165, or between a DU 165 and an RU 170 may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU 160, a DU 165, or an RU 170, while other functions of the protocol layer are performed by a different one of the CU 160, the DU 165, or the RU 170) . A CU 160 may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions. A CU 160 may be connected to one or more DUs 165 via a midhaul communication link 162 (e.g., F1, F1-c, F1-u) , and a DU 165 may be connected to one or more RUs 170 via a fronthaul communication link 168 (e.g., open fronthaul (FH) interface) . In some examples, a midhaul communication link 162 or a fronthaul communication link 168 may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities 105 that are in communication via such communication links.
In wireless communications systems (e.g., wireless communications system 100) , infrastructure and spectral resources for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, providing an IAB network architecture (e.g., to a core network 130) . In some cases, in an IAB network, one or more network entities 105 (e.g., IAB nodes 104) may be partially controlled by each other. One or more IAB nodes 104 may be referred to as a donor entity or an IAB donor. One or more DUs 165 or one or more RUs 170 may be partially controlled by one or more CUs 160 associated with a donor network entity 105 (e.g., a donor base station 140) . The one or more donor network entities 105 (e.g., IAB donors) may be in communication with one or more additional network entities 105 (e.g., IAB nodes 104) via supported access and backhaul links (e.g., backhaul communication links 120) . IAB nodes 104 may include an IAB mobile termination (IAB-MT) controlled (e.g., scheduled) by DUs 165 of a coupled IAB donor. An IAB-MT may include an independent set of antennas for relay of communications with UEs 115, or may share the same antennas (e.g., of an RU 170) of an IAB node 104 used for access via the DU 165 of the IAB node 104 (e.g., referred to as virtual IAB-MT (vIAB-MT) ) . In some examples, the IAB nodes 104 may include DUs 165 that support communication links with additional entities (e.g., IAB nodes 104, UEs 115) within the relay chain or configuration of the access network (e.g., downstream) . In such cases, one or more components of the disaggregated RAN architecture (e.g., one or more IAB nodes 104 or components of IAB nodes 104) may be configured to operate according to the techniques described herein.
For instance, an access network (AN) or RAN may include communications between access nodes (e.g., an IAB donor) , IAB nodes 104, and one or more UEs 115. The IAB donor may facilitate connection between the core network 130 and the AN (e.g., via a wired or wireless connection to the core network 130) . That is, an IAB donor may refer to a RAN node with a wired or wireless connection to core network 130. The IAB donor may include a CU 160 and at least one DU 165 (e.g., and RU 170) , in which case the CU 160 may communicate with the core network 130 via an interface (e.g., a backhaul link) . IAB donor and IAB nodes 104 may communicate via an F1 interface according to a protocol that defines signaling messages (e.g., an F1 AP protocol) . Additionally, or alternatively, the CU 160 may communicate with the core network via an interface, which may be an example of a portion of backhaul link, and may communicate with other CUs 160 (e.g., a CU 160 associated with an alternative IAB donor) via an Xn-C interface, which may be an example of a portion of a backhaul link.
An IAB node 104 may refer to a RAN node that provides IAB functionality (e.g., access for UEs 115, wireless self-backhauling capabilities) . A DU 165 may act as a distributed scheduling node towards child nodes associated with the IAB node 104, and the IAB-MT may act as a scheduled node towards parent nodes associated with the IAB node 104. That is, an IAB donor may be referred to as a parent node in communication with one or more child nodes (e.g., an IAB donor may relay transmissions for UEs through one or more other IAB nodes 104) . Additionally, or alternatively, an IAB node 104 may also be referred to as a parent node or a child node to other IAB nodes 104, depending on the relay chain or configuration of the AN. Therefore, the IAB-MT entity of IAB nodes 104 may provide a Uu interface for a child IAB node 104 to receive signaling from a parent IAB node 104, and the DU interface (e.g., DUs 165) may provide a Uu interface for a parent IAB node 104 to signal to a child IAB node 104 or UE 115.
For example, IAB node 104 may be referred to as a parent node that supports communications for a child IAB node, or referred to as a child IAB node associated with an IAB donor, or both. The IAB donor may include a CU 160 with a wired or wireless connection (e.g., a backhaul communication link 120) to the core network 130 and may act as parent node to IAB nodes 104. For example, the DU 165 of IAB donor may relay transmissions to UEs 115 through IAB nodes 104, or may directly signal transmissions to a UE 115, or both. The CU 160 of IAB donor may signal communication link establishment via an F1 interface to IAB nodes 104, and the IAB nodes 104 may schedule transmissions (e.g., transmissions to the UEs 115 relayed from the IAB donor) through the DUs 165. That is, data may be relayed to and from IAB nodes 104 via signaling via an NR Uu interface to MT of the IAB node 104. Communications with IAB node 104 may be scheduled by a DU 165 of IAB donor and communications with IAB node 104 may be scheduled by DU 165 of IAB node 104.
In the case of the techniques described herein applied in the context of a disaggregated RAN architecture, one or more components of the disaggregated RAN architecture may be configured to support overhead reduction for complementary confidence level reporting in beam predictions as described herein. For example, some operations described as being performed by a UE 115 or a network entity 105 (e.g., a base station 140) may additionally, or alternatively, be performed by one or more components of the disaggregated RAN architecture (e.g., IAB nodes 104, DUs 165, CUs 160, RUs 170, RIC 175, SMO 180) .
A UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples. A UE 115 may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA) , a tablet computer, a laptop computer, or a personal computer. In some examples, a UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, or vehicles, meters, among other examples.
The UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115 that may sometimes act as relays as well as the network entities 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.
The UEs 115 and the network entities 105 may wirelessly communicate with one another via one or more communication links 125 (e.g., an access link) using resources associated with one or more carriers. The term “carrier” may refer to a set of RF spectrum resources having a defined physical layer structure for supporting the communication links 125. For example, a carrier used for a communication link 125 may include a portion of a RF spectrum band (e.g., a bandwidth part (BWP) ) that is operated according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR) . Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information) , control signaling that coordinates operation for the carrier, user data, or other signaling. The wireless communications system 100 may support communication with a UE 115 using carrier aggregation or multi-carrier operation. A UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers. Communication between a network entity 105 and other devices may refer to communication between the devices and any portion (e.g., entity, sub-entity) of a network entity 105. For example, the terms “transmitting, ” “receiving, ” or “communicating, ” when refening to a network entity 105, may refer to any portion of a network entity 105 (e.g., a base station 140, a CU 160, a DU 165, a RU 170) of a RAN communicating with another device (e.g., directly or via one or more other network entities 105) .
In some examples, such as in a carrier aggregation configuration, a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers. A carrier may be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute RF channel number (EARFCN) ) and may be identified according to a channel raster for discovery by the UEs 115. A carrier may be operated in a standalone mode, in which case initial acquisition and connection may be conducted by the UEs 115 via the carrier, or the carrier may be operated in a non-standalone mode, in which case a connection is anchored using a different carrier (e.g., of the same or a different radio access technology) .
The communication links 125 shown in the wireless communications system 100 may include downlink transmissions (e.g., forward link transmissions) from a network entity 105 to a UE 115, uplink transmissions (e.g., return link transmissions) from a UE 115 to a network entity 105, or both, among other configurations of transmissions. Carriers may carry downlink or uplink communications (e.g., in an FDD mode) or may be configured to carry downlink and uplink communications (e.g., in a TDD mode) .
A carrier may be associated with a particular bandwidth of the RF spectrum, and, in some examples, the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system 100. For example, the carrier bandwidth may be one of a set of bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz) ) . Devices of the wireless communications system 100 (e.g., the network entities 105, the UEs 115, or both) may have hardware configurations that support communications using a particular carrier bandwidth or may be configurable to support communications using one of a set of carrier bandwidths. In some examples, the wireless communications system 100 may include network entities 105 or UEs 115 that support concurrent communications using carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured for operating using portions (e.g., a sub-band, a BWP) or all of a carrier bandwidth.
Signal waveforms transmitted via a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM) ) . In a system employing MCM techniques, a resource element may refer to resources of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, in which case the symbol period and subcarrier spacing may be inversely related. The quantity of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both) , such that a relatively higher quantity of resource elements (e.g., in a transmission duration) and a relatively higher order of a modulation scheme may correspond to a relatively higher rate of communication. A wireless communications resource may refer to a combination of an RF spectrum resource, a time resource, and a spatial resource (e.g., a spatial layer, a beam) , and the use of multiple spatial resources may increase the data rate or data integrity for communications with a UE 115.
One or more numerologies for a carrier may be supported, and a numerology may include a subcarrier spacing (Δf) and a cyclic prefix. A carrier may be divided into one or more BWPs having the same or different numerologies. In some examples, a UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time and communications for the UE 115 may be restricted to one or more active BWPs.
The time intervals for the network entities 105 or the UEs 115 may be expressed in multiples of a basic time unit which may, for example, refer to a sampling period of T_s=1/ (Δf_max·N_f) seconds, for which Δf_max may represent a supported subcarrier spacing, and N_f may represent a supported discrete Fourier transform (DFT) size. Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms) ) . Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023) .
Each frame may include multiple consecutively-numbered subframes or slots, and each subframe or slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a quantity of slots. Alternatively, each frame may include a variable quantity of slots, and the quantity of slots may depend on subcarrier spacing. Each slot may include a quantity of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period) . In some wireless communications systems 100, a slot may further be divided into multiple mini-slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., N_f) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation.
A subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system 100 and may be referred to as a transmission time interval (TTI) . In some examples, the TTI duration (e.g., a quantity of symbol periods in a TTI) may be variable. Additionally, or alternatively, the smallest scheduling unit of the wireless communications system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) ) .
Physical channels may be multiplexed for communication using a carrier according to various techniques. A physical control channel and a physical data channel may be multiplexed for signaling via a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET) ) for a physical control channel may be defined by a set of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESETs) may be configured for a set of the UEs 115. For example, one or more of the UEs 115 may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to an amount of control channel resources (e.g., control channel elements (CCEs) ) associated with encoded information for a control information format having a given payload size. Search space sets may include common search space sets configured for sending control information to multiple UEs 115 and UE-specific search space sets for sending control information to a specific UE 115.
A network entity 105 may provide communication coverage via one or more cells, for example a macro cell, a small cell, a hot spot, or other types of cells, or any combination thereof. The term “cell” may refer to a logical communication entity used for communication with a network entity 105 (e.g., using a carrier) and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID) , a virtual cell identifier (VCID) , or others) . In some examples, a cell also may refer to a coverage area 110 or a portion of a coverage area 110 (e.g., a sector) over which the logical communication entity operates. Such cells may range from smaller areas (e.g., a structure, a subset of structure) to larger areas depending on various factors such as the capabilities of the network entity 105. For example, a cell may be or include a building, a subset of a building, or exterior spaces between or overlapping with coverage areas 110, among other examples.
A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by the UEs 115 with service subscriptions with the network provider supporting the macro cell. A small cell may be associated with a lower-powered network entity 105 (e.g., a lower-powered base station 140) , as compared with a macro cell, and a small cell may operate using the same or different (e.g., licensed, unlicensed) frequency bands as macro cells. Small cells may provide unrestricted access to the UEs 115 with service subscriptions with the network provider or may provide restricted access to the UEs 115 having an association with the small cell (e.g., the UEs 115 in a closed subscriber group (CSG) , the UEs 115 associated with users in a home or office) . A network entity 105 may support one or multiple cells and may also support communications via the one or more cells using one or multiple component carriers.
In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT) , enhanced mobile broadband (eMBB) ) that may provide access for different types of devices.
In some examples, a network entity 105 (e.g., a base station 140, an RU 170) may be movable and therefore provide communication coverage for a moving coverage area 110. In some examples, different coverage areas 110 associated with different technologies may overlap, but the different coverage areas 110 may be supported by the same network entity 105. In some other examples, the overlapping coverage areas 110 associated with different technologies may be supported by different network entities 105. The wireless communications system 100 may include, for example, a heterogeneous network in which different types of the network entities 105 provide coverage for various coverage areas 110 using the same or different radio access technologies.
The wireless communications system 100 may support synchronous or asynchronous operation. For synchronous operation, network entities 105 (e.g., base stations 140) may have similar frame timings, and transmissions from different network entities 105 may be approximately aligned in time. For asynchronous operation, network entities 105 may have different frame timings, and transmissions from different network entities 105 may, in some examples, not be aligned in time. The techniques described herein may be used for either synchronous or asynchronous operations.
Some UEs 115, such as MTC or IoT devices, may be low cost or low complexity devices and may provide for automated communication between machines (e.g., via Machine-to-Machine (M2M) communication) . M2M communication or MTC may refer to data communication technologies that allow devices to communicate with one another or a network entity 105 (e.g., a base station 140) without human intervention. In some examples, M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application program that uses the information or presents the information to humans interacting with the application program. Some UEs 115 may be designed to collect information or enable automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.
Some UEs 115 may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode that supports one-way communication via transmission or reception, but not transmission and reception concurrently) . In some examples, half-duplex communications may be performed at a reduced peak rate. Other power conservation techniques for the UEs 115 include entering a power saving deep sleep mode when not engaging in active communications, operating using a limited bandwidth (e.g., according to narrowband communications) , or a combination of these techniques. For example, some UEs 115 may be configured for operation using a narrowband protocol type that is associated with a defined portion or range (e.g., set of subcarriers or resource blocks (RBs) ) within a carrier, within a guard-band of a carrier, or outside of a carrier.
The wireless communications system 100 may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof. For example, the wireless communications system 100 may be configured to support ultra-reliable low-latency communications (URLLC) . The UEs 115 may be designed to support ultra-reliable, low-latency, or critical functions. Ultra-reliable communications may include private communication or group communication and may be supported by one or more services such as push-to-talk, video, or data. Support for ultra-reliable, low-latency functions may include prioritization of services, and such services may be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, and ultra-reliable low-latency may be used interchangeably herein.
In some examples, a UE 115 may be configured to support communicating directly with other UEs 115 via a device-to-device (D2D) communication link 135 (e.g., in accordance with a peer-to-peer (P2P) , D2D, or sidelink protocol) . In some examples, one or more UEs 115 of a group that are performing D2D communications may be within the coverage area 110 of a network entity 105 (e.g., a base station 140, an RU 170) , which may support aspects of such D2D communications being configured by (e.g., scheduled by) the network entity 105. In some examples, one or more UEs 115 of such a group may be outside the coverage area 110 of a network entity 105 or may be otherwise unable to or not configured to receive transmissions from a network entity 105. In some examples, groups of the UEs 115 communicating via D2D communications may support a one-to-many (1: M) system in which each UE 115 transmits to each of the other UEs 115 in the group. In some examples, a network entity 105 may facilitate the scheduling of resources for D2D communications. In some other examples, D2D communications may be carried out between the UEs 115 without an involvement of a network entity 105.
In some systems, a D2D communication link 135 may be an example of a communication channel, such as a sidelink communication channel, between vehicles (e.g., UEs 115) . In some examples, vehicles may communicate using vehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these. A vehicle may signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information relevant to a V2X system. In some examples, vehicles in a V2X system may communicate with roadside infrastructure, such as roadside units, or with the network via one or more network nodes (e.g., network entities 105, base stations 140, RUs 170) using vehicle-to-network (V2N) communications, or with both.
The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or 5G core (5GC) , which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management function (AMF) ) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) . The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs 115 served by the network entities 105 (e.g., base stations 140) associated with the core network 130. User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions. The user plane entity may be connected to IP services 150 for one or more network operators. The IP services 150 may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched Streaming Service.
The wireless communications system 100 may operate using one or more frequency bands, which may be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz) . Generally, the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length. UHF waves may be blocked or redirected by buildings and environmental features, which may be referred to as clusters, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs 115 located indoors. Communications using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to communications using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.
The wireless communications system 100 may also operate using a super high frequency (SHF) region, which may be in the range of 3 GHz to 30 GHz, also known as the centimeter band, or using an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) , also known as the millimeter band. In some examples, the wireless communications system 100 may support millimeter wave (mmW) communications between the UEs 115 and the network entities 105 (e.g., base stations 140, RUs 170) , and EHF antennas of the respective devices may be smaller and more closely spaced than UHF antennas. In some examples, such techniques may facilitate using antenna arrays within a device. The propagation of EHF transmissions, however, may be subject to even greater attenuation and shorter range than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body.
The wireless communications system 100 may utilize both licensed and unlicensed RF spectrum bands. For example, the wireless communications system 100 may employ License Assisted Access (LAA) , LTE-Unlicensed (LTE-U) radio access technology, or NR technology using an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. While operating using unlicensed RF spectrum bands, devices such as the network entities 105 and the UEs 115 may employ carrier sensing for collision detection and avoidance. In some examples, operations using unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating using a licensed band (e.g., LAA) . Operations using unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.
A network entity 105 (e.g., a base station 140, an RU 170) or a UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of a network entity 105 or a UE 115 may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with a network entity 105 may be located at diverse geographic locations. A network entity 105 may include an antenna array with a set of rows and columns of antenna ports that the network entity 105 may use to support beamforming of communications with a UE 115. Likewise, a UE 115 may include one or more antenna arrays that may support various MIMO or beamforming operations. Additionally, or alternatively, an antenna panel may support RF beamforming for a signal transmitted via an antenna port.
The network entities 105 or the UEs 115 may use MIMO communications to exploit multipath signal propagation and increase spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques may be referred to as spatial multiplexing. The multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry information associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords) . Different spatial layers may be associated with different antenna ports used for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO) , for which multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO) , for which multiple spatial layers are transmitted to multiple devices.
Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a network entity 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating along particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference. The adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device. The adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation) .
A network entity 105 or a UE 115 may use beam sweeping techniques as part of beamforming operations. For example, a network entity 105 (e.g., a base station 140, an RU 170) may use multiple antennas or antenna arrays (e.g., antenna panels) to conduct beamforming operations for directional communications with a UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by a network entity 105 multiple times along different directions. For example, the network entity 105 may transmit a signal according to different beamforming weight sets associated with different directions of transmission. Transmissions along different beam directions may be used to identify (e.g., by a transmitting device, such as a network entity 105, or by a receiving device, such as a UE 115) a beam direction for later transmission or reception by the network entity 105.
Some signals, such as data signals associated with a particular receiving device, may be transmitted by transmitting device (e.g., a transmitting network entity 105, a transmitting UE 115) along a single beam direction (e.g., a direction associated with the receiving device, such as a receiving network entity 105 or a receiving UE 115) . In some examples, the beam direction associated with transmissions along a single beam direction may be determined based on a signal that was transmitted along one or more beam directions. For example, a UE 115 may receive one or more of the signals transmitted by the network entity 105 along different directions and may report to the network entity 105 an indication of the signal that the UE 115 received with a highest signal quality or an otherwise acceptable signal quality.
In some examples, transmissions by a device (e.g., by a network entity 105 or a UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or beamforming to generate a combined beam for transmission (e.g., from a network entity 105 to a UE 115) . The UE 115 may report feedback that indicates precoding weights for one or more beam directions, and the feedback may correspond to a configured set of beams across a system bandwidth or one or more sub-bands. The network entity 105 may transmit a reference signal (e.g., a cell-specific reference signal (CRS) , a channel state information reference signal (CSI-RS) ) , which may be precoded or unprecoded. The UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook) . Although these techniques are described with reference to signals transmitted along one or more directions by a network entity 105 (e.g., a base station 140, an RU 170) , a UE 115 may employ similar techniques for transmitting signals multiple times along different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE 115) or for transmitting a signal along a single direction (e.g., for transmitting data to a receiving device) .
A receiving device (e.g., a UE 115) may perform reception operations in accordance with multiple receive configurations (e.g., directional listening) when receiving various signals from a receiving device (e.g., a network entity 105) , such as synchronization signals, reference signals, beam selection signals, or other control signals. For example, a receiving device may perform reception in accordance with multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as “listening” according to different receive configurations or receive directions. In some examples, a receiving device may use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal) . The single receive configuration may be aligned along a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio (SNR) , or otherwise acceptable signal quality based on listening according to multiple beam directions) .
The wireless communications system 100 may be a packet-based network that operates according to a layered protocol stack. In the user plane, communications at the bearer or PDCP layer may be IP-based. An RLC layer may perform packet segmentation and reassembly to communicate via logical channels. A MAC layer may perform priority handling and multiplexing of logical channels into transport channels. The MAC layer also may implement error detection techniques, error correction techniques, or both to support retransmissions to improve link efficiency. In the control plane, an RRC layer may provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a network entity 105 or a core network 130 supporting radio bearers for user plane data. A PHY layer may map transport channels to physical channels.
The UEs 115 and the network entities 105 may support retransmissions of data to increase the likelihood that data is received successfully. Hybrid automatic repeat request (HARQ) feedback is one technique for increasing the likelihood that data is received correctly via a communication link (e.g., a communication link 125, a D2D communication link 135) . HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC) ) , forward error correction (FEC) , and retransmission (e.g., automatic repeat request (ARQ) ) . HARQ may improve throughput at the MAC layer in poor radio conditions (e.g., low signal-to-noise conditions) . In some examples, a device may support same-slot HARQ feedback, in which case the device may provide HARQ feedback in a specific slot for data received via a previous symbol in the slot. In some other examples, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.
A UE 115 may monitor CMRs to generate channel predictions and may generate confidence values for those channel predictions. The UE 115 may then indicate in a first CSI report which subset of predictions are associated with confidence values that the UE 115 will subsequently report (e.g., which subset of confidence values do not satisfy a threshold, instead of a binary indication of whether the UE 115 will report all or no confidence values) . The UE may then report the specific indicated confidence values for a subset of predictions in a second triggered CSI report. In some examples, as described herein, the UE 115 may transmit indications of the confidence values for one or more predictions where the confidence values do not satisfy a threshold, if a quantity of observed instances of confidence levels that are lower than the threshold during a duration satisfy a report triggering criterion. The network may configure such thresholds.
FIG. 2 illustrates an example of a wireless communications system 200 that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure. The wireless communications system 200 may implement aspects of, or may be implemented by aspects of, the wireless communications system 100. For example, the wireless communications system 200 may include a UE 115-a, and a network entity 105-a, which may be examples of corresponding devices described with reference to FIG. 2.
In some examples, the UE 115-a may perform channel measurements, and may generate predicted channel quality values for one or more resources, as described in greater detail with reference to FIG. 3. For example, the UE 115-a may receive one or more reference signals via one or more resources (e.g., CMRs, virtual resources, among other examples) , and may perform one or more measurements via one or more beams. The UE 115-a may generate predicted channel quality values 215 (e.g., for one or more CMRs or virtual resources) , which the UE 115-a may include in a first CSI report 205. The first CSI report 205-a may include the predicted channel quality values 215 and corresponding resource identifiers (IDs) . In some examples, the UE 115-a may also generate confidence values for each predicted channel quality value 215. The network entity 105-a may utilize such confidence values to determine one or more parameters for subsequent communications with the UE 115-a (e.g., a modulation and coding scheme (MCS) , rate, beam selection, resource selection, etc. ) . In some examples, the network entity 105-a may determine whether to rely on predicted channel quality values 215 based on the confidence levels. The UE 115-a may include, in the first CSI report 205-a, a confidence level feedback request 220, requesting resources for sending a second CSI report 205-b. In response, the network entity 105-a may transmit a trigger 210, for an aperiodic second CSI report 205-b. In an example, the trigger may be a control message (e.g., DCI, MAC CE, etc. ) instructing the UE 115-a to send the second CSI report 205-b and allocating resources for sending the second CSI report 205-b.
To reduce unnecessary reporting overhead of confidence levels corresponding to beam predictions (e.g., predicted channel quality values 215 associated with specific resources and specific beams, as described in greater detail with reference to FIG. 3) , the UE 115-a may perform event-triggered complementary confidence level reporting. For example, in the first CSI report 205-a, the UE 115-a may report the predicted channel quality values 215 (e.g., a predicted L1-RSRP, a predicted L1-SINR, among other examples) for each of a set of N resources associated with a CSI report setting (e.g., which may be configured by the network entity 105-a) . The UE 115-a may include an indicator (e.g., a one-bit indication) of whether all predicted channel quality values 215 reported in the first CSI report 205-a are associated with confidence levels 225 that do not satisfy a threshold (e.g., are below a standards defined or configured threshold value) .
In response to such an indicator, the network entity 105-a may transmit a scheduling message for a second CSI report 205-b, and the UE 115-a may transmit the second CSI report 205-b indicating the confidence levels 225 corresponding to the predicted channel quality values 215. Thus, if even only one of the confidence levels 225 associated with the predicted channel quality values 215 fails to satisfy the threshold (e.g., is lower than the threshold) , then the UE 115-a may request and transmit the second CSI report 205-b, which may include confidence levels 225 for each of the predicted channel quality values 215 (e.g., despite one or more of the reported confidence levels 225 being associated with predicted channel quality values 215 for which the confidence level 225 does satisfy the threshold, and is therefore not helpful to the network entity 105-a) . In some examples, the network entity 105-a may aperiodically trigger the second CSI report 205-b. To maintain a fixed payload size, the UE 115-a may report confidence levels associated with every resource addressed in the first CSI report 205-a. Such techniques may result in unnecessary signaling overhead, unnecessary use of additional resources for the CSI report 205-b, decreased throughput, increased system latency, and decreased user experience.
Techniques described herein may support more granular, and event-triggered, CSI reporting of confidence levels 225. Such techniques may lower UE reporting overhead consumed for event triggered confidence level reporting for beam predictions. In some examples, the UE 115-a may transmit a resource specific indication (e.g., a multi-bit indicator) as a confidence level feedback request 220 (e.g., as described in greater detail with reference to FIGs. 4-5) . In some examples, the UE 115-a may transmit a confidence level feedback request 220 based on an event that triggers the transmission (e.g., based on detecting a threshold quantity of predicted channel quality values 215 during a configured time window that satisfies a reporting criterion, which may be referred to using statistics for one or more triggering events) (e.g., as described in greater detail with reference to FIG. 6) . In some examples, the UE 115-a may transmit the confidence level feedback request 220 based on a prioritizing scheme for the predicted channel quality values 215, where a triggering event considers priorities of predicted quantities (e.g., as described in greater detail with reference to FIG. 7) . The UE 115-a may transmit a multi-bit indicator as a confidence level feedback request 220. The multi-bit indicator may indicate which predicted channel quality values (e.g., which resources) are associated with confidence levels 225 that failed to satisfy the threshold.
FIG. 3 illustrates an example of a channel measurement scheme 300 that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure. The channel measurement scheme 300 may implement or may be implemented by aspects of the wireless communications systems 100 and 200. For example, the channel measurement scheme 300 may include a CSI report 315, which may be an example of a CSI report 205, or a CSI report 205-b, as described with reference to FIG. 2.
In some examples of beam management (e.g., AI-based, ML-based beam management) , a network entity (e.g., the network entity 105-a) may configure a UE with two sets of beams for CSI measurement and prediction. The network entity may configure the UE with a first set of beams 310-a (e.g., set A) . The UE may perform measurements on the first set of beams 310-a via the first set of resources 305-a (e.g., channel measurement resources (CMRs) ) . In some examples, the network entity may configure the UE with a second set of beams 310-b (e.g., set B) . The UE may perform a beam prediction (e.g., spatial-domain downlink beam prediction, temporal downlink beam prediction) for the second set of beams 310-b based on measurement results, historic measurement results, or a combination thereof, of the first set of beams 310-a. In some cases, the UE may use a second set of resources 305-b (e.g., CMRs, virtual resources) to perform the beam prediction, and the second set of resources 305-b may correspond to the second set of beams 310-b. The UE may perform measurements using the set of beams 310-a and the set of beams 310-b via resources in the same frequency range or in different frequency ranges (e.g., the first set of resources 305-a and the second set of resources 305-b may partially overlap in frequency, completely overlap in frequency, may correspond to adjacent frequency ranges or frequency bands or subbands, or may be entirely different from each other) .
In some examples, the first set of beams 310-a may be a subset of the second set of beams 310-b. In some examples, the first set of beams 310-a may have a same quantity of beams as the second set of beams 310-b, or the sets of beams 310 may have different quantities of beams. In some cases, the set of beams 310-a may be associated with the set of beams 310-b based on a fixed pattern, a random pattern, or a quasi-colocation relationship. The set of beams 310-a may have different characteristics than the set of beams 310-b. For example, the set of beams 310-a may be wide (e.g., coarse) beams and the set of beams 310-b may be narrow (e.g., fine) beams. In some examples, subsets of beams 310-b may correspond to individual coarse beams of the set of beams 310-b (e.g., three narrow beams of the set of beams 310-b may correspond to each coarse beam of the set of beams 310-a) . The set of beams 310-a may be for downlink beam measurement, and the set of beams 310-b may be for DL beam prediction. The sets of beams 310 may be indicated by codebook constructions.
In some examples, a network entity may configure a UE for one or more serving cells (e.g., via RRC configuration) . The configuration may include a codebook which may include sets of beams that may be formed by, or otherwise associated with, the first serving cell (e.g., the first set of beams 310-a, the second set of beams 310-b) . The codebook may also include codepoints, and a network entity may use the codepoints in a cross-serving cell scheme to identify the first set of beams 310-a, the first set of resources 305-a, the second set of beams 310-b, the second set of resources 305-b, or a combination thereof. The codebook may include codebook indices where each resource of a set of resources 305 or each beam of a set of beams 310 is indicated by a unique codebook index. In some examples, the network entity may use the codepoints to indicate that the first set of resources 305-a and the second set of resources 305-b are associated with each other, or that the first set of beams 310-a and the second set of beams 310-b are associated with each other, or both.
The network entity may indicate or request that the UE transmits a CSI report associated with the first serving cell to the network entity, and the UE may transmit the CSI report 315 to the network entity. The UE may include in the CSI report 315 measurements of the first set of resources 305-a associated with the first set of beams 310-a, predicted measurements for the second set of resources 305-b associated with the second set of beams 310-b, or a combination thereof. The UE may indicate via the CSI report an association between measurements of the first set of resources 305-aand predicted measurements of the second set of resources 305-b (e.g., according to codepoints in the indicated codebook) . In some examples, the UE may indicate preferred beams, optimal beams, or candidate beams from the sets of beams 310 via the CSI report by selecting codepoint indices in the codebook that correspond to the preferred beams, optimal beams, or candidate beams. In other examples, the UE may indicate preferred or candidate resources from the sets of resources 305 by selecting codepoint indices from the codebook that correspond to the preferred or candidate resources. By using codepoint indices to select beams or resources in the CSI report, the UE may support low RRC overhead, or flexibility to dynamically alter beam point directions or beam widths, or both.
In some cases, the CSI report, the set of beams 310-a (and corresponding set of resources 305-a) , and the set of beams 310-b (and corresponding set of resources 305-b) may be associated with a single serving cell, or for multiple serving cells.
The UE may perform the predicted measurements (e.g., L1-RSRP, L1-SINR) based on associations between the first set of resources 305-a and the second set of resources 305-b. For example, the UE may perform one or more channel measurements via the first set of resources using the first set of beams according to the cross serving cell scheme. Based on the one or more channel measurements, the UE may transmit to the network entity (e.g., to the first serving cell) the CSI report 315 indicating predicted channel quality information (e.g., predicted measurements) for the second set of resources 305-b for the second set of beams 310-b associated with the second serving cell.
Associations between the set of resources 305-a and the set of resources 305-b may be separately configured or indicated in the first serving cell, the one or more second serving cells, or a combination thereof. For example, control signaling that indicates cross serving cell scheme may identify an association between the set of resources 305-a and the set of resources 305-b. In some cases, a codebook may indicate beams formable by, or otherwise associated with, the second serving cell (e.g., the set of beams 310-a, the set of beams 310-b for the second cell) . The network entity may configure the UE with the codebook of beams formable by the second serving cell (e.g., via RRC configuration within the configuration information of the second serving cell) . The configuration may include the codebook, and the UE may identify associations between the first set of beams 310-a and the second set of beams 310-b of the second serving cell using beamforming codepoints within the codebook.
In some examples, as described herein, the UE may also generate confidence values associated with predicted cannel quality measurements. The UE may perform event-triggered reporting, or may use a multi-bit indicator to indicate which channel quality measurements (e.g., which resources of a set of resources 305) are associated with confidence values that fail to satisfy a threshold.
FIG. 4 illustrates an example of a confidence level reporting scheme 400 that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure. The confidence level reporting scheme 400 may incorporate aspects of, or may be incorporated by aspects of, the wireless communications system 100, the wireless communications system 200, and the channel measurement scheme 300. For example, a UE and a network entity (e.g., which may be examples of corresponding devices described with reference to FIGs. 1-3) may communicate with each other according to the confidence level reporting scheme 400.
In some examples, as described with reference to FIGs. 2-3, the UE may perform CSI measurements, and may predicted channel quality values (e.g., for respective beams and respective resources) . The UE may transmit a CSI report 405-a(e.g., which may be an example of a CSI report 205 or a CSI report 315) , which may include one or more predicted channel quality values for respective beams and resources (e.g., channel quality value 1, channel quality value 2, channel quality value 3, and channel quality value 4) . For instance, the UE may report a predicted L1-RSRP, L1-SINR, rank indicator (RI) , channel quality information (CQI) , or any combination thereof, for a set of N resources (e.g., four resources) associated with a given CSI report setting.
The UE may also include, in the CSI report 405-a, an indicator 410. The indicator 410 may be a multi-bit indicator associated with the multiple resources addressed in the first CSI report 405-a (e.g., the four resources for which the channel quality values are reported) . The indicator 410 may be included in the payload of the CSI report 405-a, and may indicate whether one or more predicted channel quality values predicted for specific resources are associated with a confidence level that is below a threshold. Such a threshold may be defined in one or more standards documents, or may be configured by the network entity at the UE.
The indicator 410 may indicate that a confidence level feedback report is requested (e.g., the second CSI report 405-b is requested by the first CSI report 405-avia the indicator 410) . The UE may then further expect to be triggered (e.g., receive a trigger from the network entity) to transmit the second CSI report 405-b. The CSI report 405-b may be an aperiodic CSI report for reporting feedback regarding the confidence level of one or more predicted channel quality values indicated in the CSI report 405-a. The CSI report 405-b may include one or more confidence level values (e.g., the confidence level value 1 and the confidence level value 2) associated with predicted channel quality values indicated in the CSI report 405-a. A quantity of confidence level values in the CSI report 405-b (e.g., as indicated by a parameter , such as a reportQuantity parameter) may be linked with the first CSI report, and may be based on a codepoint reported by the UE (e.g., the multi-bit codepoint of the indicator 410) .
For example, the indicator 410 may include a multiple bits (e.g., two bits for the four predicted channel quality values in the CSI report 405-a) . Each codepoint may indicate a quantity of the predicted channel quality values for which the confidence level value does not satisfy the threefold (e.g., is lower than the threshold) . For instance, a first codepoint (e.g., 00) may indicate that the UE does not request a second CSI report 405-b (e.g., none of the channel quality values in the CSI report 405-a fail to satisfy the threshold) , a second codepoint (e.g., 01) may indicate a request for a confidence level report for a single resource, a third codepoint (e.g., 10) may indicate a request for a confidence level report for two resources, and a fourth codepoint (e.g., 11) may indicate a request for a confidence level report for all four resources. For instance, if the indicator 410 includes a two-bit indicator with a codepoint of 01, the network may trigger (e.g., grant resources for) the second CSI report 405-b, and the UE may report confidence level value 1, and confidence level value 2. In some examples, the UE may also indicate a resource ID associated with the predicted channel quality value to which the confidence level value corresponds.
In total, three second CSI reports (e.g., three configured types of CSI reports) may be linked with the first CSI report 405-a, where the reportQuantity of the first type of aperiodic CSI report may include a confidence level with respect to a single resource together with the resource ID, the reportQuantity of a second type of aperiodic CSI report may include a confidence level with respect to two resources together with their respective resource IDs (e.g., as illustrated with reference to the CSI report 405-b) , and a third type of aperiodic CSI report may include a confidence level with respect to four resources (e.g., without resource ID indications) . Each codepoint of the indicator 410 may correspond to one of the types of aperiodic CSI report, which may be triggered (e.g., granted) to the UE based on the indicator 410, and then transmitted by the UE accordingly. As such, the second CSI report 505-b may be used to report on which subset of one or more resources having confidence level (s) that each do not satisfy a threshold, and may omit from the second CSI report 405-b reporting of confidence level (s) for the remaining one or more resources that satisfy the threshold, thereby reducing control signaling overhead.
FIG. 5 illustrates an example of a confidence level reporting scheme 500 that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure. The confidence level reporting scheme 500 may incorporate aspects of, or may be incorporated by aspects of, the wireless communications system 100, the wireless communications system 200, the channel measurement scheme 300, or the confidence level reporting scheme 400. For example, a UE and a network entity (e.g., which may be examples of corresponding devices described with reference to FIGs. 1-4) may communicate with each other according to the confidence level reporting scheme 500.
In some examples, as described with reference to FIGs. 2-4, the UE may perform CSI measurements, and may predicted channel quality values (e.g., for respective beams and respective resources) . The UE may transmit a CSI report 505-a(e.g., which may be an example of a CSI report 205 a CSI report 315, or a CSI report 405-a) , which may include one or more predicted channel quality values for respective beams and resources (e.g., channel quality value 1, channel quality value 2, channel quality value 3, and channel quality value 4) . For instance, the UE may report a predicted L1-RSRP, L1-SINR, RI, CQI, or any combination thereof, for a set of N resources (e.g., four resources) associated with a given CSI report setting.
The UE may also include, in the CSI report 505-a, an indicator 510. The indicator 510 may be a multi-bit indicator associated with the multiple resources addressed in the first CSI report 505-a (e.g., the four resources for which the channel quality values are reported) . The indicator 510 may be included in the payload of the CSI report 505-a, and may indicate whether one or more predicted channel quality values predicted for specific resources are associated with a confidence level that is below a threshold. Such a threshold may be defined in one or more standards documents, or may be configured by the network entity at the UE.
The indicator 510 may indicate that a confidence level feedback report is requested (e.g., the second CSI report 505-b is requested by the first CSI report 505-avia the indicator 510) . The UE may then further expect to be triggered (e.g., receive a trigger from the network entity) to transmit the second CSI report 505-b. The CSI report 505-b may be an aperiodic CSI report for reporting feedback regarding the confidence level of one or more predicted channel quality values indicated in the CSI report 505-a. The CSI report 505-b may include one or more confidence level values (e.g., the confidence level value 1 and the confidence level value 2) associated with predicted channel quality values indicated in the CSI report 505-a. A quantity of confidence level values in the CSI report 505-b (e.g., as indicated by a parameter , such as a reportQuantity parameter) may be linked with the first CSI report, and may be based on a codepoint reported by the UE (e.g., the multi-bit codepoint of the indicator 510) .
For example, the indicator 510 may include a multiple bits (e.g., four bits for the four predicted channel quality values in the CSI report 505-a) . Each codepoint may indicate a combination of the predicted channel quality values for which the confidence level value does not satisfy the threefold (e.g., is lower than the threshold) . For instance, the indicator 510 may include a bitmap (e.g., a four-bit bitmap) , where each bit 515 is associated with a corresponding resource addressed in the first CSI report 505-a. Each bit 515 may indicate whether a confidence level report is requested for the corresponding resource. For instance, the channel quality value 1 and the channel quality value 3 may be associated with confidence levels that do not satisfy the threshold. A first bit 515-a and a third bit 515-c may indicate that the channel quality value 1, and the channel quality value 3, respectively, correspond to confidence levels that do not satisfy the threshold. A second bit 515-b and a fourth bit 515-d may indicate that the channel quality value 2, and the channel quality value 4, respectively, correspond to confidence levels that do satisfy the threshold. In other words, the four-bit indicator 510 may request a second CSI report 505-b for indicating two confidence levels. The CSI report 505-b may include a confidence level 1 (e.g., corresponding to the channel quality value 1) and a confidence level 3 (e.g., corresponding to the channel quality value 3) as indicated in the bitmap of the indicator 510.
In such examples, the second aperiodic CSI report 505-b may be linked with the first CSI report 505-a, where a reportQuantity of the aperiodic CSI report 505-b (e.g., a first, second, third, or fourth type of CSI report 505) may include confidence levels with respect to 1, 2, 3, or 4 resources without resource identification (e.g., as the resource IDs were already identified by the bitmap of the indicator 510) . As such, the second CSI report 505-b may be used to report on which subset of one or more resources having confidence level (s) that each do not satisfy a threshold, and may omit from the second CSI report 505-b reporting of confidence level (s) for the remaining one or more resources that satisfy the threshold, thereby reducing control signaling overhead.
FIG. 6 illustrates an example of a timeline 600 that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure. The timeline may implement aspects of, or may be implemented by aspects of, the wireless communications system 100, the wireless communications system 200, the channel measurement scheme 300, the confidence level reporting scheme 400, or the confidence level reporting scheme 500. For example, a UE and a network entity (e.g., which may be examples of corresponding devices described with reference to FIGs. 1-5) may communicate with each other according to the timeline 600.
In some examples, the UE may perform event-triggered reporting of confidence levels, where statistics are used for triggering events. Based on at least one criterion, the UE may send its request to report confidence levels associated with predicted beams via a first CSI report (e.g., as described with reference to FIGs. 4 and 5) , or may autonomously report confidence levels without such an indication (e.g., via a single CSI report, a MAC-CE message, or RRC signaling) . The at least one criterion may include whether the UE has observed a threshold quantity (e.g., X) of instances of confidence levels for predicted channel quality values that are lower than a threshold during a time duration such as the time window 605 (e.g., a duration of Y ms) . For example, the UE may maintain a count of how many instances of a confidence level lower than the threshold occur during the time window 605. If the quantity of instances detected during the time window 605 (e.g., duration Y) satisfies the criterion (e.g., is higher than the threshold quantity of instances X) , then the UE may identify a triggering event and transmit an indication of the confidence levels for the instances detected (e.g., via an initial CSI report, or via a second CSI report as described with reference to FIGs. 4-5) .
In some examples, the network may configure the values for X and Y, or may be indicated in one or more standards. In some examples, the network may indicate the values for X and Y may be configured via RRC signaling, a MAC-CE message, DCI signaling, or any combination thereof. In some examples, RRC signaling, a MAC-CE message (e.g., activating semi-persistent (SP) CSI reporting) , DCI signaling, or a combination thereof, may be used to update a previously indicated or configured value for X, Y, or both. In some examples, such values for X, Y, or both, may be configured per serving cell, per BWP, per CSI report configuration (e.g., where CSI reporting is regarding reporting predicted channel characteristics as described herein) . The instances of confidence levels monitored by, or detected by the UE may be configured by the network entity, or may be defined in one or more standards. For example, each instance may be defined as a triggering event, or only certain instances may be considered (e.g., as described with reference to FIG. 7) .
In some examples, the network may configure, via RRC signaling, a timer with a threshold value (e.g., duration) of Y ms (e.g., the time window 605) , and a value of X. The timer may be activated upon successful configuration. In some examples, the network entity may use a separate message (e.g., a MAC-CE or a DCI message) to activate or update the timer. The UE may then count the total number of observed instances (e.g., 6 instances during the time window 605) occurring while the timer is running. If the timer reaches the value of Y ms (e.g., expires) , and the total number of counted instances does not reach X, the UE may reset the timer to zero, and reset the total number of instances counter to zero. However, if the UE counted instance value reaches X before the timer reaches Y (e.g., before the timer expires) , the UE may send the request for the second CSI report or autonomously send the confidence level report.
FIG. 7 illustrates an example of a confidence level reporting scheme 700 that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure. The confidence level reporting scheme 700 may implement aspects of, or may be implemented by aspects of, the wireless communications system 100, the wireless communications system 200, the channel measurement scheme 300, the confidence level reporting scheme 400, the confidence level reporting scheme 500, or the confidence level reporting scheme 600. For example, a UE and a network entity (e.g., which may be examples of corresponding devices described with reference to FIGs. 1-5) may communicate with each other according to the confidence level reporting scheme 700.
In some examples, the UE may perform event-triggered reporting of confidence levels. The triggering event may include considering priority levels of predicted channel quality values (e.g., predicted quantities) . According to the triggering event, the UE may count a total quantity of instances (e.g., as described with reference to FIG. 6) , or may send a request for a second CSI report for indicating confidence levels via a first CSI report (e.g., as described with reference to FIGs. 4-5) . According to the triggering event, the UE may only consider whether predicted and reported strongest (e.g., best) predicted channel quality values (e.g., associated with a subset of the predicted channel quality measurements) have been identified with confidence levels lower than a threshold. For instance, the UE may consider a portion of the predicted channel quality values (e.g., half of the predicted values, the highest two predicted values, etc. ) . For instance, the UE may consider the two resources with the strongest channel quality values (e.g., channel quality value 1 and channel quality value 2) , and may ignore the remaining channel quality values (e.g., the channel quality value 3 and the channel quality value 4 that have lower predicted values) . The UE may then determine whether the confidence level for the channel quality value 1 and the channel quality value 2 satisfy the threshold or not. If the confidence levels corresponding to the highest channel quality values do not satisfy the threshold, then the UE may autonomously report the confidence levels along with the channel quality values, or may request (e.g., using an indicator 710) a second CSI message for indicating the one or more confidence levels.
In some examples, (e.g., when operating according to techniques described with reference to FIGs. 4-5, the UE may address a total number of resources N (e.g., in first CSI report) . For evaluating whether the UE is to send the request for the confidence level feedback (e.g. via a CSI report 705-a) , the UE may only consider whether predicted and reported strongest channel quality values associated with M resources (e.g., where M<N resources) have been identified with confidence levels lower than a threshold (e.g., standardized or configured by the network entity) . The remaining reported channel quality values (e.g., channel quality 3 and channel quality 4) do not need to be considered for evaluating whether a triggering event has occurred. In some examples, the UE may transmit a CSI report 705-b including one or more confidence levels (e.g., the confidence level 1 and the confidence level 2) based on evaluating whether confidence values for the channel quality value 1 and the channel quality value 2 are associated with confidence levels that fail to satisfy the threshold. For example, for evaluating whether the UE should send the request or the confidence level feedback, the UE only needs to consider whether the predicted and reported strongest L1-RSRPs/L1-SINRs associated with M<N resources, have been identified with confidence levels lower than a threshold (e.g., where the threshold is defined in a standard or configured by control signaling received from a network entity) , wherein the remaining reported L1-RSRPs/L1-SINRs do not need to be considered for evaluating the triggering event.
In some examples (e.g., when operating according to techniques described with reference to FIG. 5) , the UE may report predicted channel quality values via the first CSI report, and a total number of resources addressed in the first CSI report may be N. For evaluating whether an instance of a confidence level not satisfying a threshold is to be counted, the UE may only consider whether predicted and reported strongest channel quality values associated with M resources (e.g., where M<N resources) have been identified with confidence levels lower than a threshold (e.g., standardized or configured by the network entity) . The remaining reported channel quality values (e.g., channel quality 3 and channel quality 4) do not need to be considered for evaluating whether a triggering event has occurred. For evaluating whether a instance may be counted, the UE only needs to consider whether the predicted and reported strongest L1-RSRPs/L1-SINRs associated with M<N resources, have been identified with confidence levels lower threshold (e.g., where the threshold is defined in a standard or configured by control signaling received from a network entity) , where the remaining reported L1-RSRPs/L1-SINRs do not need to be considered for evaluating the triggering event.
FIG. 8 illustrates an example of a process flow 800 that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure. The process flow 800 may implement aspects of, or may be implemented by aspects of, the wireless communications system 100, the wireless communications system 200, the channel measurement scheme 300, the confidence level reporting scheme 400, the confidence level reporting scheme 500, the confidence level reporting scheme 600, or the confidence level reporting scheme 700. For example, the process flow 800 may include a UE 115-b, and a network entity 105-b, which may be examples of corresponding devices described with reference to FIGs. 1-7.
At 805, the UE 115-b may receive (e.g., from the network entity 105-b) one or more reference signals via a set of resources (e.g., virtual resources or CMRs) for predicting channel characteristics, such as channel quality. The resources may be a spatial resource, a time resource, a frequency resource, or any combination thereof.
At 810, the UE 115-b may transmit (e.g., to the network entity 105-b) a first CSI report indicating predicted channel quality values corresponding to respective resources of the set of resources. The first CSI report may include a confidence level feedback request based at least in part on one or more confidence values for a subset of the predicted channel quality values failing to satisfy a threshold. The first CSI report may include a confidence level feedback request, which may be a multi-bit indicator. The multi-bit indictor may indicate a quantity of confidence values corresponding to the subset of the predicted channel quality values (e.g., as described in greater detail with reference to FIG. 4) . In some examples, the muti-bit indicator may indicate a quantity of predicted channel quality values corresponding to the subset of the predicted channel quality values. Each bit of the indicator may be associated with one of the predicted channel quality values (e.g., as described in greater detail with reference to FIG. 5) .
The first CSI report may include the confidence level feedback request based on a quantity of one or more highest predicted channel quality value being associated with a respective confidence value failing to satisfy the threshold, as described in greater detail with reference to FIG. 7.
At 815, the UE 115-b may receive (e.g., from the network entity 105-b) a trigger for a second CSI report based at least in part on the confidence level feedback request indicated in the first CSI report.
At 820, the UE 115-b may transmit (e.g., to the network entity 105-b) a second CSI report indicating the one or more confidence values for the subset of the predicted channel quality values. The second CSI report may include a set of resources IDs corresponding to the subset of the predicted channel quality values. Each of the confidence values may correspond to a respective resource ID of the set of resource IDs. The second CSI report may indicate the one or more confidence values based on a quantity of one or more highest predicted channel quality values of the predicted channel quality values being associated with respective confidence values failing to satisfy the threshold.
FIG. 9 illustrates an example of a process flow 900 that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure. The process flow 900 may implement aspects of, or may be implemented by aspects of, the wireless communications system 100, the wireless communications system 200, the channel measurement scheme 300, the confidence level reporting scheme 400, the confidence level reporting scheme 500, the confidence level reporting scheme 600, the confidence level reporting scheme 700, or the process flow 800. For example, the process flow 800 may include a UE 115-b, and a network entity 105-b, which may be examples of corresponding devices described with reference to FIGs. 1-8.
At 810, the UE 115-c may receive one or more reference signals (e.g., from the network entity 105-c) via resources (e.g., virtual resources or CMRs) for predicting channel characteristics, such as channel quality.
At 815, the UE 115-c may generate predicted channel quality values corresponding to respective resources of the resources during a time window. In some examples, one or more confidence values for a subset of the predicted channel quality values may fail to satisfy a threshold.
At 820, the UE 115-c may transmit a CSI report to the network entity 105-c. The CSI report may indicate the one or more confidence values associated with one or more respective resources based at least in part on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion, as described in greater detail with reference to FIG. 6.
In some examples, the UE 115-c may transmit two CSI reports. For example, the UE 115-c may transmit, in the CSI report at 820, a first CSI report indicating the plurality of predicted channel quality values and a confidence level feedback request based at least in part on the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying the report triggering criterion. At 825, responsive to the confidence level feedback request, a trigger for a second channel state information report. The second CSI report may include the one or more confidence values. The UE 115-c may include in the CSI report (e.g., the second CSI report) , based at least in part on the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying the report triggering criterion, an indication of the plurality of predicted channel quality values, the one or more confidence values, and a set of resource identifiers corresponding to the one or more respective resources.
In some examples, at 805, the UE 115-c may receive control signaling including an indication of the threshold, the report triggering criterion, or both. For example, the UE 115-c may receive first control signaling (e.g., a first control message) and second control signaling (e.g., a second control signal) . The first control signaling may include an indication of a set of candidate threshold values, a set of candidate report triggering criteria, or both, and the second control signaling may include an indication of a threshold value of the set of candidate threshold values for the threshold, the report triggering criterion of the set of candidate report triggering criteria, or both. In some examples, the first control signaling may include a default threshold value, a default report triggering criterion, or both, and the second control signaling may update the default threshold value to the threshold, the default report triggering criterion, or both. In some examples, the control signaling may include an indication of a serving cell, a BWP, a CSI reporting configuration, or a combination thereof, corresponding to the threshold, the report triggering criterion, or both.
In some examples, the UE 115-c may set a timer associated with the time window, and may reset the timer upon determining that the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfy the report triggering criterion prior to or upon expiration of the timer. In some examples, the UE may set the timer associated with the time window, and may reset the timer upon determining that the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfy the report triggering criterion prior to or upon expiration of the timer. In some examples, the UE 115-c may reset the timer upon determining that a second quantity of an additional one or more confidence values fails to satisfy the threshold upon expiration of the timer, and may refrain from transmitting an additional channel state information report indicating confidence values for the second quantity of the additional one or more confidence values.
FIG. 10 illustrates a block diagram 1000 of a device 1005 that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure. The device 1005 may be an example of aspects of a UE 115 as described herein. The device 1005 may include a receiver 1010, a transmitter 1015, and a communications manager 1020. The device 1005 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
The receiver 1010 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to overhead reduction for complementary confidence level reporting in beam predictions) . Information may be passed on to other components of the device 1005. The receiver 1010 may utilize a single antenna or a set of multiple antennas.
The transmitter 1015 may provide a means for transmitting signals generated by other components of the device 1005. For example, the transmitter 1015 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to overhead reduction for complementary confidence level reporting in beam predictions) . In some examples, the transmitter 1015 may be co-located with a receiver 1010 in a transceiver module. The transmitter 1015 may utilize a single antenna or a set of multiple antennas.
The communications manager 1020, the receiver 1010, the transmitter 1015, or various combinations thereof or various components thereof may be examples of means for performing various aspects of overhead reduction for complementary confidence level reporting in beam predictions as described herein. For example, the communications manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may support a method for performing one or more of the functions described herein.
In some examples, the communications manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include a processor, a digital signal processor (DSP) , a central processing unit (CPU) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some examples, a processor and memory coupled with the processor may be configured to perform one or more of the functions described herein (e.g., by executing, by the processor, instructions stored in the memory) .
Additionally, or alternatively, in some examples, the communications manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by a processor. If implemented in code executed by a processor, the functions of the communications manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting a means for performing the functions described in the present disclosure) .
In some examples, the communications manager 1020 may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 1010, the transmitter 1015, or both. For example, the communications manager 1020 may receive information from the receiver 1010, send information to the transmitter 1015, or be integrated in combination with the receiver 1010, the transmitter 1015, or both to obtain information, output information, or perform various other operations as described herein.
The communications manager 1020 may support wireless communications at a UE in accordance with examples as disclosed herein. For example, the communications manager 1020 may be configured as or otherwise support a means for receiving one or more reference signals from a network entity via a set of multiple resources for predicting channel quality. The communications manager 1020 may be configured as or otherwise support a means for transmitting a first channel state information report including a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources, the first channel state information report including a confidence level feedback request based on one or more confidence values for a subset of the set of multiple predicted channel quality values failing to satisfy a threshold. The communications manager 1020 may be configured as or otherwise support a means for receiving a trigger for a second channel state information report based on the confidence level feedback request. The communications manager 1020 may be configured as or otherwise support a means for transmitting, based on receiving the trigger, the second channel state information report including the one or more confidence values, each of the one or more confidence values corresponding to a respective resource of the set of multiple resources.
Additionally, or alternatively, the communications manager 1020 may support wireless communications at a UE in accordance with examples as disclosed herein. For example, the communications manager 1020 may be configured as or otherwise support a means for receiving one or more reference signals from a network entity via a set of multiple resources for predicting channel quality. The communications manager 1020 may be configured as or otherwise support a means for generating a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources during a time window, where one or more confidence values for a subset of the set of multiple predicted channel quality values fail to satisfy a threshold. The communications manager 1020 may be configured as or otherwise support a means for transmitting a channel state information report including the one or more confidence values associated with one or more respective resources of the set of multiple resources based on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion.
By including or configuring the communications manager 1020 in accordance with examples as described herein, the device 1005 (e.g., a processor controlling or otherwise coupled with the receiver 1010, the transmitter 1015, the communications manager 1020, or a combination thereof) may support techniques for channel characteristic prediction and confidence level reporting resulting in more efficiency utilization of communication resources, reduced signaling overhead, and improved reliability of wireless communications.
FIG. 11 illustrates a block diagram 1100 of a device 1105 that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure. The device 1105 may be an example of aspects of a device 1005 or a UE 115 as described herein. The device 1105 may include a receiver 1110, a transmitter 1115, and a communications manager 1120. The device 1105 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
The receiver 1110 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to overhead reduction for complementary confidence level reporting in beam predictions) . Information may be passed on to other components of the device 1105. The receiver 1110 may utilize a single antenna or a set of multiple antennas.
The transmitter 1115 may provide a means for transmitting signals generated by other components of the device 1105. For example, the transmitter 1115 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to overhead reduction for complementary confidence level reporting in beam predictions) . In some examples, the transmitter 1115 may be co-located with a receiver 1110 in a transceiver module. The transmitter 1115 may utilize a single antenna or a set of multiple antennas.
The device 1105, or various components thereof, may be an example of means for performing various aspects of overhead reduction for complementary confidence level reporting in beam predictions as described herein. For example, the communications manager 1120 may include a reference signal manager 1125, a CSI report manager 1130, a CSI report trigger manager 1135, a predicted channel quality manager 1140, or any combination thereof. The communications manager 1120 may be an example of aspects of a communications manager 1020 as described herein. In some examples, the communications manager 1120, or various components thereof, may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 1110, the transmitter 1115, or both. For example, the communications manager 1120 may receive information from the receiver 1110, send information to the transmitter 1115, or be integrated in combination with the receiver 1110, the transmitter 1115, or both to obtain information, output information, or perform various other operations as described herein.
The communications manager 1120 may support wireless communications at a UE in accordance with examples as disclosed herein. The reference signal manager 1125 may be configured as or otherwise support a means for receiving one or more reference signals from a network entity via a set of multiple resources for predicting channel quality. The CSI report manager 1130 may be configured as or otherwise support a means for transmitting a first channel state information report including a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources, the first channel state information report including a confidence level feedback request based on one or more confidence values for a subset of the set of multiple predicted channel quality values failing to satisfy a threshold. The CSI report trigger manager 1135 may be configured as or otherwise support a means for receiving a trigger for a second channel state information report based on the confidence level feedback request. The CSI report manager 1130 may be configured as or otherwise support a means for transmitting, based on receiving the trigger, the second channel state information report including the one or more confidence values, each of the one or more confidence values corresponding to a respective resource of the set of multiple resources.
Additionally, or alternatively, the communications manager 1120 may support wireless communications at a UE in accordance with examples as disclosed herein. The reference signal manager 1125 may be configured as or otherwise support a means for receiving one or more reference signals from a network entity via a set of multiple resources for predicting channel quality. The predicted channel quality manager 1140 may be configured as or otherwise support a means for generating a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources during a time window, where one or more confidence values for a subset of the set of multiple predicted channel quality values fail to satisfy a threshold. The CSI report manager 1130 may be configured as or otherwise support a means for transmitting a channel state information report including the one or more confidence values associated with one or more respective resources of the set of multiple resources based on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion.
FIG. 12 illustrates a block diagram 1200 of a communications manager 1220 that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure. The communications manager 1220 may be an example of aspects of a communications manager 1020, a communications manager 1120, or both, as described herein. The communications manager 1220, or various components thereof, may be an example of means for performing various aspects of overhead reduction for complementary confidence level reporting in beam predictions as described herein. For example, the communications manager 1220 may include a reference signal manager 1225, a CSI report manager 1230, a CSI report trigger manager 1235, a predicted channel quality manager 1240, a confidence level feedback request manager 1245, a confidence value manager 1250, a triggering criterion manager 1255, a timer manager 1260, or any combination thereof. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
The communications manager 1220 may support wireless communications at a UE in accordance with examples as disclosed herein. The reference signal manager 1225 may be configured as or otherwise support a means for receiving one or more reference signals from a network entity via a set of multiple resources for predicting channel quality. The CSI report manager 1230 may be configured as or otherwise support a means for transmitting a first channel state information report including a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources, the first channel state information report including a confidence level feedback request based on one or more confidence values for a subset of the set of multiple predicted channel quality values failing to satisfy a threshold. The CSI report trigger manager 1235 may be configured as or otherwise support a means for receiving a trigger for a second channel state information report based on the confidence level feedback request. In some examples, the CSI report manager 1230 may be configured as or otherwise support a means for transmitting, based on receiving the trigger, the second channel state information report including the one or more confidence values, each of the one or more confidence values corresponding to a respective resource of the set of multiple resources.
In some examples, the CSI report manager 1230 may be configured as or otherwise support a means for transmitting, via the second channel state information report, a set of resource identifiers, each of the one or more confidence values corresponding to a respective resource identifier of the set of resource identifiers.
In some examples, the confidence level feedback request manager 1245 may be configured as or otherwise support a means for transmitting, via the first channel state information report, the confidence level feedback request including a multi-bit indicator, the multi-bit indicator indicating a quantity of confidence values corresponding to the subset of the set of multiple predicted channel quality values.
In some examples, each codepoint of the multi-bit indicator is associated with a different quantity of predicted channel quality values. In some examples, a codepoint indicated by the multi-bit indicator in the first channel state information report indicates a quantity of predicted channel quality values corresponding to the subset of the set of multiple predicted channel quality values.
In some examples, each bit of the multi-bit indicator is associated with one of the set of multiple predicted channel quality values.
In some examples, the confidence value manager 1250 may be configured as or otherwise support a means for receiving control signaling indicating a threshold portion of the set of multiple resources. In some examples, the confidence value manager 1250 may be configured as or otherwise support a means for selecting a subset of the set of multiple resources based on the threshold portion. In some examples, the confidence value manager 1250 may be configured as or otherwise support a means for generating the one or more confidence values for the subset of the set of multiple predicted channel quality values based on the selecting.
In some examples, to support selecting the subset of the set of multiple resources, the confidence value manager 1250 may be configured as or otherwise support a means for selecting the subset of the set of multiple resources corresponding to a highest predicted channel quality values and satisfying the threshold portion of the set of multiple resources.
Additionally, or alternatively, the communications manager 1220 may support wireless communications at a UE in accordance with examples as disclosed herein. In some examples, the reference signal manager 1225 may be configured as or otherwise support a means for receiving one or more reference signals from a network entity via a set of multiple resources for predicting channel quality. The predicted channel quality manager 1240 may be configured as or otherwise support a means for generating a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources during a time window, where one or more confidence values for a subset of the set of multiple predicted channel quality values fail to satisfy a threshold. In some examples, the CSI report manager 1230 may be configured as or otherwise support a means for transmitting a channel state information report including the one or more confidence values associated with one or more respective resources of the set of multiple resources based on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion.
In some examples, the CSI report manager 1230 may be configured as or otherwise support a means for transmitting, based on the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying the report triggering criterion, a first channel state information report including the set of multiple predicted channel quality values and a confidence level feedback request. In some examples, the CSI report manager 1230 may be configured as or otherwise support a means for receiving, based on the confidence level feedback request, a trigger for a second channel state information report, where the second channel state information report includes the channel state information report including the one or more confidence values.
In some examples, transmitting the channel state information report including the one or more confidence values is based on receiving the trigger.
In some examples, to support transmitting the channel state information report, the CSI report manager 1230 may be configured as or otherwise support a means for transmitting, based on the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying the report triggering criterion, the channel state information report including the set of multiple predicted channel quality values, the one or more confidence values, and a set of resource identifiers corresponding to the one or more respective resources of the set of multiple resources.
In some examples, the triggering criterion manager 1255 may be configured as or otherwise support a means for receiving control signaling including an indication of the threshold, the report triggering criterion, or both.
In some examples, to support receiving the control signaling, the triggering criterion manager 1255 may be configured as or otherwise support a means for receiving first control signaling including an indication of a set of candidate threshold values, a set of candidate report triggering criteria, or both. In some examples, to support receiving the control signaling, the triggering criterion manager 1255 may be configured as or otherwise support a means for receiving second control signaling indicating a threshold value of the set of candidate threshold values, the report triggering criterion of the set of candidate report triggering criteria, or both.
In some examples, to support receiving the control signaling, the triggering criterion manager 1255 may be configured as or otherwise support a means for receiving first control signaling including a default threshold value, a default report triggering criterion, or both. In some examples, to support receiving the control signaling, the triggering criterion manager 1255 may be configured as or otherwise support a means for receiving second control signaling updating the default threshold value, the default report triggering criterion, or both.
In some examples, the triggering criterion manager 1255 may be configured as or otherwise support a means for receiving, via the control signaling, an indication of a serving cell, a bandwidth part, a channel state information reporting configuration, or a combination thereof, corresponding to the threshold, the report triggering criterion, or both.
In some examples, the timer manager 1260 may be configured as or otherwise support a means for setting a timer associated with the time window. In some examples, the timer manager 1260 may be configured as or otherwise support a means for resetting the timer upon determining that the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfy the report triggering criterion prior to or upon expiration of the timer.
In some examples, the timer manager 1260 may be configured as or otherwise support a means for resetting the timer upon determining that a second quantity of an additional one or more confidence values fails to satisfy the threshold upon expiration of the timer. In some examples, the timer manager 1260 may be configured as or otherwise support a means for refraining from transmitting an additional channel state information report including confidence values for the second quantity of the additional one or more confidence values.
In some examples, the confidence value manager 1250 may be configured as or otherwise support a means for receiving control signaling indicating a threshold portion of the set of multiple resources. In some examples, the confidence value manager 1250 may be configured as or otherwise support a means for selecting a subset of the set of multiple resources based on the threshold portion. In some examples, the confidence value manager 1250 may be configured as or otherwise support a means for generating the one or more confidence values for the subset of the set of multiple predicted channel quality values based on the selecting.
In some examples, to support selecting the subset of the set of multiple resources, the confidence value manager 1250 may be configured as or otherwise support a means for selecting the subset of the set of multiple resources corresponding to a highest predicted channel quality values and satisfying the threshold portion of the set of multiple resources.
FIG. 13 illustrates a diagram of a system 1300 including a device 1305 that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure. The device 1305 may be an example of or include the components of a device 1005, a device 1105, or a UE 115 as described herein. The device 1305 may communicate (e.g., wirelessly) with one or more network entities 105, one or more UEs 115, or any combination thereof. The device 1305 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager 1320, an input/output (I/O) controller 1310, a transceiver 1315, an antenna 1325, a memory 1330, code 1335, and a processor 1340. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 1345) .
The I/O controller 1310 may manage input and output signals for the device 1305. The I/O controller 1310 may also manage peripherals not integrated into the device 1305. In some cases, the I/O controller 1310 may represent a physical connection or port to an external peripheral. In some cases, the I/O controller 1310 may utilize an operating system such as or another known operating system. Additionally or alternatively, the I/O controller 1310 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I/O controller 1310 may be implemented as part of a processor, such as the processor 1340. In some cases, a user may interact with the device 1305 via the I/O controller 1310 or via hardware components controlled by the I/O controller 1310.
In some cases, the device 1305 may include a single antenna 1325. However, in some other cases, the device 1305 may have more than one antenna 1325, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 1315 may communicate bi-directionally, via the one or more antennas 1325, wired, or wireless links as described herein. For example, the transceiver 1315 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 1315 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 1325 for transmission, and to demodulate packets received from the one or more antennas 1325. The transceiver 1315, or the transceiver 1315 and one or more antennas 1325, may be an example of a transmitter 1015, a transmitter 1115, a receiver 1010, a receiver 1110, or any combination thereof or component thereof, as described herein.
The memory 1330 may include random access memory (RAM) and read-only memory (ROM) . The memory 1330 may store computer-readable, computer-executable code 1335 including instructions that, when executed by the processor 1340, cause the device 1305 to perform various functions described herein. The code 1335 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code 1335 may not be directly executable by the processor 1340 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the memory 1330 may contain, among other things, a basic I/O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
The processor 1340 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) . In some cases, the processor 1340 may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the processor 1340. The processor 1340 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1330) to cause the device 1305 to perform various functions (e.g., functions or tasks supporting overhead reduction for complementary confidence level reporting in beam predictions) . For example, the device 1305 or a component of the device 1305 may include a processor 1340 and memory 1330 coupled with or to the processor 1340, the processor 1340 and memory 1330 configured to perform various functions described herein.
The communications manager 1320 may support wireless communications at a UE in accordance with examples as disclosed herein. For example, the communications manager 1320 may be configured as or otherwise support a means for receiving one or more reference signals from a network entity via a set of multiple resources for predicting channel quality. The communications manager 1320 may be configured as or otherwise support a means for transmitting a first channel state information report including a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources, the first channel state information report including a confidence level feedback request based on one or more confidence values for a subset of the set of multiple predicted channel quality values failing to satisfy a threshold. The communications manager 1320 may be configured as or otherwise support a means for receiving a trigger for a second channel state information report based on the confidence level feedback request. The communications manager 1320 may be configured as or otherwise support a means for transmitting, based on receiving the trigger, the second channel state information report including the one or more confidence values, each of the one or more confidence values corresponding to a respective resource of the set of multiple resources.
Additionally, or alternatively, the communications manager 1320 may support wireless communications at a UE in accordance with examples as disclosed herein. For example, the communications manager 1320 may be configured as or otherwise support a means for receiving one or more reference signals from a network entity via a set of multiple resources for predicting channel quality. The communications manager 1320 may be configured as or otherwise support a means for generating a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources during a time window, where one or more confidence values for a subset of the set of multiple predicted channel quality values fail to satisfy a threshold. The communications manager 1320 may be configured as or otherwise support a means for transmitting a channel state information report including the one or more confidence values associated with one or more respective resources of the set of multiple resources based on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion.
By including or configuring the communications manager 1320 in accordance with examples as described herein, the device 1305 may support techniques for channel characteristic prediction and confidence level reporting resulting in more efficiency utilization of communication resources, reduced signaling overhead, improved reliability of predicted channel characteristics, increased throughput, decreased latency, improved reliability of wireless communications, and improved user experience.
In some examples, the communications manager 1320 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver 1315, the one or more antennas 1325, or any combination thereof. Although the communications manager 1320 is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager 1320 may be supported by or performed by the processor 1340, the memory 1330, the code 1335, or any combination thereof. For example, the code 1335 may include instructions executable by the processor 1340 to cause the device 1305 to perform various aspects of overhead reduction for complementary confidence level reporting in beam predictions as described herein, or the processor 1340 and the memory 1330 may be otherwise configured to perform or support such operations.
FIG. 14 illustrates a block diagram 1400 of a device 1405 that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure. The device 1405 may be an example of aspects of a network entity 105 as described herein. The device 1405 may include a receiver 1410, a transmitter 1415, and a communications manager 1420. The device 1405 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
The receiver 1410 may provide a means for obtaining (e.g., receiving, determining, identifying) information such as user data, control information, or any combination thereof (e.g., I/Q samples, symbols, packets, protocol data units, service data units) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) . Information may be passed on to other components of the device 1405. In some examples, the receiver 1410 may support obtaining information by receiving signals via one or more antennas. Additionally, or alternatively, the receiver 1410 may support obtaining information by receiving signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.
The transmitter 1415 may provide a means for outputting (e.g., transmitting, providing, conveying, sending) information generated by other components of the device 1405. For example, the transmitter 1415 may output information such as user data, control information, or any combination thereof (e.g., I/Q samples, symbols, packets, protocol data units, service data units) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) . In some examples, the transmitter 1415 may support outputting information by transmitting signals via one or more antennas. Additionally, or alternatively, the transmitter 1415 may support outputting information by transmitting signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 1415 and the receiver 1410 may be co-located in a transceiver, which may include or be coupled with a modem.
The communications manager 1420, the receiver 1410, the transmitter 1415, or various combinations thereof or various components thereof may be examples of means for performing various aspects of overhead reduction for complementary confidence level reporting in beam predictions as described herein. For example, the communications manager 1420, the receiver 1410, the transmitter 1415, or various combinations or components thereof may support a method for performing one or more of the functions described herein.
In some examples, the communications manager 1420, the receiver 1410, the transmitter 1415, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include a processor, a DSP, a CPU, an ASIC, an FPGA or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some examples, a processor and memory coupled with the processor may be configured to perform one or more of the functions described herein (e.g., by executing, by the processor, instructions stored in the memory) .
Additionally, or alternatively, in some examples, the communications manager 1420, the receiver 1410, the transmitter 1415, or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by a processor. If implemented in code executed by a processor, the functions of the communications manager 1420, the receiver 1410, the transmitter 1415, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting a means for performing the functions described in the present disclosure) .
In some examples, the communications manager 1420 may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 1410, the transmitter 1415, or both. For example, the communications manager 1420 may receive information from the receiver 1410, send information to the transmitter 1415, or be integrated in combination with the receiver 1410, the transmitter 1415, or both to obtain information, output information, or perform various other operations as described herein.
The communications manager 1420 may support wireless communications at a network entity in accordance with examples as disclosed herein. For example, the communications manager 1420 may be configured as or otherwise support a means for transmitting one or more reference signals to a UE via a set of multiple resources for predicting channel quality. The communications manager 1420 may be configured as or otherwise support a means for receiving a first channel state information report including a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources, the first channel state information report including a confidence level feedback request based on one or more confidence values for a subset of the set of multiple predicted channel quality values failing to satisfy a threshold. The communications manager 1420 may be configured as or otherwise support a means for transmitting a trigger for a second channel state information report based on the confidence level feedback request. The communications manager 1420 may be configured as or otherwise support a means for receiving, based on receiving the trigger, the second channel state information report including the one or more confidence values, each of the one or more confidence values corresponding to a respective resource of the set of multiple resources.
Additionally, or alternatively, the communications manager 1420 may support wireless communications at a network entity in accordance with examples as disclosed herein. For example, the communications manager 1420 may be configured as or otherwise support a means for transmitting one or more reference signals from a network entity via a set of multiple resources for predicting channel quality during a time window. The communications manager 1420 may be configured as or otherwise support a means for receiving a channel state information report including one or more confidence values for a set of multiple predicted channel quality values corresponding to respective resources of a set of multiple resources, where the one or more confidence values are for a subset of the set of multiple predicted channel quality values that fail to satisfy a threshold, and where receiving the channel state information report is based on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion.
By including or configuring the communications manager 1420 in accordance with examples as described herein, the device 1405 (e.g., a processor controlling or otherwise coupled with the receiver 1410, the transmitter 1415, the communications manager 1420, or a combination thereof) may support techniques for channel characteristic prediction and confidence level reporting resulting in more efficiency utilization of communication resources, reduced signaling overhead, and improved reliability of wireless communications.
FIG. 15 illustrates a block diagram 1500 of a device 1505 that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure. The device 1505 may be an example of aspects of a device 1405 or a network entity 105 as described herein. The device 1505 may include a receiver 1510, a transmitter 1515, and a communications manager 1520. The device 1505 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
The receiver 1510 may provide a means for obtaining (e.g., receiving, determining, identifying) information such as user data, control information, or any combination thereof (e.g., I/Q samples, symbols, packets, protocol data units, service data units) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) . Information may be passed on to other components of the device 1505. In some examples, the receiver 1510 may support obtaining information by receiving signals via one or more antennas. Additionally, or alternatively, the receiver 1510 may support obtaining information by receiving signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.
The transmitter 1515 may provide a means for outputting (e.g., transmitting, providing, conveying, sending) information generated by other components of the device 1505. For example, the transmitter 1515 may output information such as user data, control information, or any combination thereof (e.g., I/Q samples, symbols, packets, protocol data units, service data units) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) . In some examples, the transmitter 1515 may support outputting information by transmitting signals via one or more antennas. Additionally, or alternatively, the transmitter 1515 may support outputting information by transmitting signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 1515 and the receiver 1510 may be co-located in a transceiver, which may include or be coupled with a modem.
The device 1505, or various components thereof, may be an example of means for performing various aspects of overhead reduction for complementary confidence level reporting in beam predictions as described herein. For example, the communications manager 1520 may include a reference signal manager 1525, a CSI report manager 1530, a CSI report trigger manager 1535, or any combination thereof. The communications manager 1520 may be an example of aspects of a communications manager 1420 as described herein. In some examples, the communications manager 1520, or various components thereof, may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 1510, the transmitter 1515, or both. For example, the communications manager 1520 may receive information from the receiver 1510, send information to the transmitter 1515, or be integrated in combination with the receiver 1510, the transmitter 1515, or both to obtain information, output information, or perform various other operations as described herein.
The communications manager 1520 may support wireless communications at a network entity in accordance with examples as disclosed herein. The reference signal manager 1525 may be configured as or otherwise support a means for transmitting one or more reference signals to a UE via a set of multiple resources for predicting channel quality. The CSI report manager 1530 may be configured as or otherwise support a means for receiving a first channel state information report including a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources, the first channel state information report including a confidence level feedback request based on one or more confidence values for a subset of the set of multiple predicted channel quality values failing to satisfy a threshold. The CSI report trigger manager 1535 may be configured as or otherwise support a means for transmitting a trigger for a second channel state information report based on the confidence level feedback request. The CSI report manager 1530 may be configured as or otherwise support a means for receiving, based on receiving the trigger, the second channel state information report including the one or more confidence values, each of the one or more confidence values corresponding to a respective resource of the set of multiple resources.
Additionally, or alternatively, the communications manager 1520 may support wireless communications at a network entity in accordance with examples as disclosed herein. The reference signal manager 1525 may be configured as or otherwise support a means for transmitting one or more reference signals from a network entity via a set of multiple resources for predicting channel quality during a time window. The CSI report manager 1530 may be configured as or otherwise support a means for receiving a channel state information report including one or more confidence values for a set of multiple predicted channel quality values corresponding to respective resources of a set of multiple resources, where the one or more confidence values are for a subset of the set of multiple predicted channel quality values that fail to satisfy a threshold, and where receiving the channel state information report is based on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion.
FIG. 16 illustrates a block diagram 1600 of a communications manager 1620 that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure. The communications manager 1620 may be an example of aspects of a communications manager 1420, a communications manager 1520, or both, as described herein. The communications manager 1620, or various components thereof, may be an example of means for performing various aspects of overhead reduction for complementary confidence level reporting in beam predictions as described herein. For example, the communications manager 1620 may include a reference signal manager 1625, a CSI report manager 1630, a CSI report trigger manager 1635, a resource threshold manager 1640, a confidence value manager 1645, a report triggering criterion manager 1650, or any combination thereof. Each of these components may communicate, directly or indirectly, with one another (e.g., via one or more buses) which may include communications within a protocol layer of a protocol stack, communications associated with a logical channel of a protocol stack (e.g., between protocol layers of a protocol stack, within a device, component, or virtualized component associated with a network entity 105, between devices, components, or virtualized components associated with a network entity 105) , or any combination thereof.
The communications manager 1620 may support wireless communications at a network entity in accordance with examples as disclosed herein. The reference signal manager 1625 may be configured as or otherwise support a means for transmitting one or more reference signals to a UE via a set of multiple resources for predicting channel quality. The CSI report manager 1630 may be configured as or otherwise support a means for receiving a first channel state information report including a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources, the first channel state information report including a confidence level feedback request based on one or more confidence values for a subset of the set of multiple predicted channel quality values failing to satisfy a threshold. The CSI report trigger manager 1635 may be configured as or otherwise support a means for transmitting a trigger for a second channel state information report based on the confidence level feedback request. In some examples, the CSI report manager 1630 may be configured as or otherwise support a means for receiving, based on receiving the trigger, the second channel state information report including the one or more confidence values, each of the one or more confidence values corresponding to a respective resource of the set of multiple resources.
In some examples, the CSI report manager 1630 may be configured as or otherwise support a means for receiving, via the second channel state information report, a set of resource identifiers, each of the one or more confidence values corresponding to a respective resource identifier of the set of resource identifiers.
In some examples, the CSI report manager 1630 may be configured as or otherwise support a means for receiving, via the first channel state information report, the confidence level feedback request including a multi-bit indicator, the multi-bit indicator indicating a quantity of confidence values corresponding to the subset of the set of multiple predicted channel quality values.
In some examples, each codepoint of the multi-bit indicator is associated with a different quantity of predicted channel quality values. In some examples, a codepoint indicated by the multi-bit indicator in the first channel state information report indicates a quantity of predicted channel quality values corresponding to the subset of the set of multiple predicted channel quality values.
In some examples, each bit of the multi-bit indicator is associated with one of the set of multiple predicted channel quality values.
In some examples, the resource threshold manager 1640 may be configured as or otherwise support a means for transmitting control signaling indicating a threshold portion of the set of multiple resources, where receiving the second channel state information report is based on the control signaling indicating the threshold portion of the set of multiple resources.
Additionally, or alternatively, the communications manager 1620 may support wireless communications at a network entity in accordance with examples as disclosed herein. In some examples, the reference signal manager 1625 may be configured as or otherwise support a means for transmitting one or more reference signals from a network entity via a set of multiple resources for predicting channel quality during a time window. In some examples, the CSI report manager 1630 may be configured as or otherwise support a means for receiving a channel state information report including one or more confidence values for a set of multiple predicted channel quality values corresponding to respective resources of a set of multiple resources, where the one or more confidence values are for a subset of the set of multiple predicted channel quality values that fail to satisfy a threshold, and where receiving the channel state information report is based on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion.
In some examples, the confidence value manager 1645 may be configured as or otherwise support a means for receiving, based on the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying the report triggering criterion, a first channel state information report including the set of multiple predicted channel quality values and a confidence level feedback request. In some examples, the CSI report trigger manager 1635 may be configured as or otherwise support a means for transmitting, based on the confidence level feedback request, a trigger for a second channel state information report, where the second channel state information report includes the channel state information report including the one or more confidence values.
In some examples, to support receiving the channel state information report, the report triggering criterion manager 1650 may be configured as or otherwise support a means for receiving, based on the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying the report triggering criterion, the channel state information report including the set of multiple predicted channel quality values, the one or more confidence values, and a set of resource identifiers corresponding to the one or more respective resources of the set of multiple resources.
In some examples, the report triggering criterion manager 1650 may be configured as or otherwise support a means for transmitting control signaling including an indication of the threshold, the report triggering criterion, or both.
In some examples, the resource threshold manager 1640 may be configured as or otherwise support a means for transmitting control signaling indicating a threshold portion of the set of multiple resources, where receiving the channel state information report is based on transmitting the control signaling indicating the threshold portion of the set of multiple resources.
FIG. 17 illustrates a diagram of a system 1700 including a device 1705 that supports overhead reduction for complementary confidence level reporting in beam predictions in accordance with one or more aspects of the present disclosure. The device 1705 may be an example of or include the components of a device 1405, a device 1505, or a network entity 105 as described herein. The device 1705 may communicate with one or more network entities 105, one or more UEs 115, or any combination thereof, which may include communications over one or more wired interfaces, over one or more wireless interfaces, or any combination thereof. The device 1705 may include components that support outputting and obtaining communications, such as a communications manager 1720, a transceiver 1710, an antenna 1715, a memory 1725, code 1730, and a processor 1735. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 1740) .
The transceiver 1710 may support bi-directional communications via wired links, wireless links, or both as described herein. In some examples, the transceiver 1710 may include a wired transceiver and may communicate bi-directionally with another wired transceiver. Additionally, or alternatively, in some examples, the transceiver 1710 may include a wireless transceiver and may communicate bi-directionally with another wireless transceiver. In some examples, the device 1705 may include one or more antennas 1715, which may be capable of transmitting or receiving wireless transmissions (e.g., concurrently) . The transceiver 1710 may also include a modem to modulate signals, to provide the modulated signals for transmission (e.g., by one or more antennas 1715, by a wired transmitter) , to receive modulated signals (e.g., from one or more antennas 1715, from a wired receiver) , and to demodulate signals. In some implementations, the transceiver 1710 may include one or more interfaces, such as one or more interfaces coupled with the one or more antennas 1715 that are configured to support various receiving or obtaining operations, or one or more interfaces coupled with the one or more antennas 1715 that are configured to support various transmitting or outputting operations, or a combination thereof. In some implementations, the transceiver 1710 may include or be configured for coupling with one or more processors or memory components that are operable to perform or support operations based on received or obtained information or signals, or to generate information or other signals for transmission or other outputting, or any combination thereof. In some implementations, the transceiver 1710, or the transceiver 1710 and the one or more antennas 1715, or the transceiver 1710 and the one or more antennas 1715 and one or more processors or memory components (for example, the processor 1735, or the memory 1725, or both) , may be included in a chip or chip assembly that is installed in the device 1705. In some examples, the transceiver may be operable to support communications via one or more communications links (e.g., a communication link 125, a backhaul communication link 120, a midhaul communication link 162, a fronthaul communication link 168) .
The memory 1725 may include RAM and ROM. The memory 1725 may store computer-readable, computer-executable code 1730 including instructions that, when executed by the processor 1735, cause the device 1705 to perform various functions described herein. The code 1730 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code 1730 may not be directly executable by the processor 1735 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the memory 1725 may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.
The processor 1735 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA, a microcontroller, a programmable logic device, discrete gate or transistor logic, a discrete hardware component, or any combination thereof) . In some cases, the processor 1735 may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the processor 1735. The processor 1735 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1725) to cause the device 1705 to perform various functions (e.g., functions or tasks supporting overhead reduction for complementary confidence level reporting in beam predictions) . For example, the device 1705 or a component of the device 1705 may include a processor 1735 and memory 1725 coupled with the processor 1735, the processor 1735 and memory 1725 configured to perform various functions described herein. The processor 1735 may be an example of a cloud-computing platform (e.g., one or more physical nodes and supporting software such as operating systems, virtual machines, or container instances) that may host the functions (e.g., by executing code 1730) to perform the functions of the device 1705. The processor 1735 may be any one or more suitable processors capable of executing scripts or instructions of one or more software programs stored in the device 1705 (such as within the memory 1725) . In some implementations, the processor 1735 may be a component of a processing system. A processing system may generally refer to a system or series of machines or components that receives inputs and processes the inputs to produce a set of outputs (which may be passed to other systems or components of, for example, the device 1705) .
For example, a processing system of the device 1705 may refer to a system including the various other components or subcomponents of the device 1705, such as the processor 1735, or the transceiver 1710, or the communications manager 1720, or other components or combinations of components of the device 1705. The processing system of the device 1705 may interface with other components of the device 1705, and may process information received from other components (such as inputs or signals) or output information to other components. For example, a chip or modem of the device 1705 may include a processing system and one or more interfaces to output information, or to obtain information, or both. The one or more interfaces may be implemented as or otherwise include a first interface configured to output information and a second interface configured to obtain information, or a same interface configured to output information and to obtain information, among other implementations. In some implementations, the one or more interfaces may refer to an interface between the processing system of the chip or modem and a transmitter, such that the device 1705 may transmit information output from the chip or modem. Additionally, or alternatively, in some implementations, the one or more interfaces may refer to an interface between the processing system of the chip or modem and a receiver, such that the device 1705 may obtain information or signal inputs, and the information may be passed to the processing system. A person having ordinary skill in the art will readily recognize that a first interface also may obtain information or signal inputs, and a second interface also may output information or signal outputs.
In some examples, a bus 1740 may support communications of (e.g., within) a protocol layer of a protocol stack. In some examples, a bus 1740 may support communications associated with a logical channel of a protocol stack (e.g., between protocol layers of a protocol stack) , which may include communications performed within a component of the device 1705, or between different components of the device 1705 that may be co-located or located in different locations (e.g., where the device 1705 may refer to a system in which one or more of the communications manager 1720, the transceiver 1710, the memory 1725, the code 1730, and the processor 1735 may be located in one of the different components or divided between different components) .
In some examples, the communications manager 1720 may manage aspects of communications with a core network 130 (e.g., via one or more wired or wireless backhaul links) . For example, the communications manager 1720 may manage the transfer of data communications for client devices, such as one or more UEs 115. In some examples, the communications manager 1720 may manage communications with other network entities 105, and may include a controller or scheduler for controlling communications with UEs 115 in cooperation with other network entities 105. In some examples, the communications manager 1720 may support an X2 interface within an LTE/LTE-A wireless communications network technology to provide communication between network entities 105.
The communications manager 1720 may support wireless communications at a network entity in accordance with examples as disclosed herein. For example, the communications manager 1720 may be configured as or otherwise support a means for transmitting one or more reference signals to a UE via a set of multiple resources for predicting channel quality. The communications manager 1720 may be configured as or otherwise support a means for receiving a first channel state information report including a set of multiple predicted channel quality values corresponding to respective resources of the set of multiple resources, the first channel state information report including a confidence level feedback request based on one or more confidence values for a subset of the set of multiple predicted channel quality values failing to satisfy a threshold. The communications manager 1720 may be configured as or otherwise support a means for transmitting a trigger for a second channel state information report based on the confidence level feedback request. The communications manager 1720 may be configured as or otherwise support a means for receiving, based on receiving the trigger, the second channel state information report including the one or more confidence values, each of the one or more confidence values corresponding to a respective resource of the set of multiple resources.
Additionally, or alternatively, the communications manager 1720 may support wireless communications at a network entity in accordance with examples as disclosed herein. For example, the communications manager 1720 may be configured as or otherwise support a means for transmitting one or more reference signals from a network entity via a set of multiple resources for predicting channel quality during a time window. The communications manager 1720 may be configured as or otherwise support a means for receiving a channel state information report including one or more confidence values for a set of multiple predicted channel quality values corresponding to respective resources of a set of multiple resources, where the one or more confidence values are for a subset of the set of multiple predicted channel quality values that fail to satisfy a threshold, and where receiving the channel state information report is based on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion.
By including or configuring the communications manager 1720 in accordance with examples as described herein, the device 1705 may support techniques for channel characteristic prediction and confidence level reporting resulting in more efficiency utilization of communication resources, reduced signaling overhead, improved reliability of predicted channel characteristics, increased throughput, decreased latency, improved reliability of wireless communications, and improved user experience.
In some examples, the communications manager 1720 may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the transceiver 1710, the one or more antennas 1715 (e.g., where applicable) , or any combination thereof. Although the communications manager 1720 is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager 1720 may be supported by or performed by the transceiver 1710, the processor 1735, the memory 1725, the code 1730, or any combination thereof. For example, the code 1730 may include instructions executable by the processor 1735 to cause the device 1705 to perform various aspects of overhead reduction for complementary confidence level reporting in beam predictions as described herein, or the processor 1735 and the memory 1725 may be otherwise configured to perform or support such operations.
The following provides an overview of aspects of the present disclosure:
Aspect 1: A method for wireless communications at a UE, comprising: receiving one or more reference signals from a network entity via a plurality of resources for predicting channel quality; transmitting a first channel state information report indicating a plurality of predicted channel quality values corresponding to respective resources of the plurality of resources, the first channel state information report comprising a confidence level feedback request based at least in part on one or more confidence values for a subset of the plurality of predicted channel quality values failing to satisfy a threshold; receiving a trigger for a second channel state information report based at least in part on the confidence level feedback request; and transmitting, based at least in part on receiving the trigger, the second channel state information report indicating the one or more confidence values for the subset of the plurality of predicted channel quality values.
Aspect 2: The method of aspect 1, further comprising: transmitting, via the second channel state information report, a set of resource identifiers corresponding to the subset of the plurality of predicted channel quality values, each of the one or more confidence values corresponding to a respective resource identifier of the set of resource identifiers.
Aspect 3: The method of any of aspects 1 through 2, further comprising: transmitting, via the first channel state information report, the confidence level feedback request comprising a multi-bit indicator, the multi-bit indicator indicating a quantity of confidence values corresponding to the subset of the plurality of predicted channel quality values.
Aspect 4: The method of aspect 3, wherein the multi-bit indicator indicates a quantity of predicted channel quality values corresponding to the subset of the plurality of predicted channel quality values.
Aspect 5: The method of any of aspects 3 through 4, wherein each bit of the multi-bit indicator is associated with one of the plurality of predicted channel quality values.
Aspect 6: The method of any of aspects 1 through 5, where transmitting the first channel state information report further comprises: transmitting the first channel state information report comprising the confidence level feedback request based at least in part on a quantity of one or more highest predicted channel quality values of the plurality of predicted channel quality values being associated with respective confidence values failing to satisfy the threshold.
Aspect 7: The method of any of aspects 1 through 6, wherein transmitting the second channel state information report further comprises: transmitting the second channel state information report indicating the one or more confidence values based at least in part on a quantity of one or more highest predicted channel quality values of the plurality of predicted channel quality values being associated with respective confidence values failing to satisfy the threshold.
Aspect 8: A method for wireless communications at a UE, comprising: receiving one or more reference signals from a network entity via a plurality of resources for predicting channel quality; generating a plurality of predicted channel quality values corresponding to respective resources of the plurality of resources during a time window, wherein one or more confidence values for a subset of the plurality of predicted channel quality values fail to satisfy a threshold; and transmitting a channel state information report indicating the one or more confidence values associated with one or more respective resources of the plurality of resources based at least in part on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion.
Aspect 9: The method of aspect 8, further comprising: transmitting, based at least in part on the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying the report triggering criterion, a first channel state information report indicating the plurality of predicted channel quality values and a confidence level feedback request; and receiving, based at least in part on the confidence level feedback request, a trigger for a second channel state information report, wherein the second channel state information report comprises the channel state information report indicating the one or more confidence values.
Aspect 10: The method of aspect 9, wherein transmitting the channel state information report indicating the one or more confidence values is based at least in part on receiving the trigger.
Aspect 11: The method of any of aspects 8 through 10, wherein transmitting the channel state information report comprises: transmitting, based at least in part on the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying the report triggering criterion, the channel state information report indicating the plurality of predicted channel quality values, the one or more confidence values, and a set of resource identifiers corresponding to the one or more respective resources of the plurality of resources.
Aspect 12: The method of any of aspects 8 through 11, further comprising: receiving control signaling comprising an indication of the threshold, the report triggering criterion, or both.
Aspect 13: The method of aspect 12, wherein receiving the control signaling comprises: receiving first control signaling comprising an indication of a set of candidate threshold values, a set of candidate report triggering criteria, or both; and receiving second control signaling indicating a threshold value of the set of candidate threshold values for the threshold, the report triggering criterion of the set of candidate report triggering criteria, or both.
Aspect 14: The method of any of aspects 12 through 13, wherein receiving the control signaling comprises: receiving first control signaling comprising a default threshold value, a default report triggering criterion, or both; and receiving second control signaling updating the default threshold value to the threshold, the default report triggering criterion, or both.
Aspect 15: The method of any of aspects 12 through 14, further comprising: receiving, via the control signaling, an indication of a serving cell, a bandwidth part, a channel state information reporting configuration, or a combination thereof, corresponding to the threshold, the report triggering criterion, or both.
Aspect 16: The method of any of aspects 8 through 15, further comprising: setting a timer associated with the time window; and resetting the timer upon determining that the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfy the report triggering criterion prior to or upon expiration of the timer.
Aspect 17: The method of aspect 16, further comprising: resetting the timer upon determining that a second quantity of an additional one or more confidence values fails to satisfy the threshold upon expiration of the timer; and refraining from transmitting an additional channel state information report indicating confidence values for the second quantity of the additional one or more confidence values.
Aspect 18: The method of any of aspects 8 through 17, further comprising: transmitting a confidence level feedback request based at least in part on a quantity of one or more highest predicted channel quality values of the plurality of predicted channel quality values being associated with respective confidence values failing to satisfy the threshold, wherein the channel state information report is transmitted in response to receiving a trigger for the channel state information report.
Aspect 19: The method of aspect 18, wherein transmitting the channel state information report further comprises: transmitting the channel state information report indicating the one or more confidence values based at least in part on a quantity of one or more highest predicted channel quality values of the plurality of predicted channel quality values being associated with respective confidence values failing to satisfy the threshold.
Aspect 20: A method for wireless communications at a network entity , comprising: transmitting one or more reference signals to a UE via a plurality of resources for predicting channel quality; receiving a first channel state information report indicating a plurality of predicted channel quality values corresponding to respective resources of the plurality of resources, the first channel state information report comprising a confidence level feedback request based at least in part on one or more confidence values for a subset of the plurality of predicted channel quality values failing to satisfy a threshold; transmitting a trigger for a second channel state information report based at least in part on the confidence level feedback request; and receiving, based at least in part on receiving the trigger, the second channel state information report indicating the one or more confidence values for the subset of the plurality of predicted channel quality values.
Aspect 21: The method of aspect 20, further comprising: receiving, via the second channel state information report, a set of resource identifiers corresponding to the subset of the plurality of predicted channel quality values, each of the one or more confidence values corresponding to a respective resource identifier of the set of resource identifiers.
Aspect 22: The method of any of aspects 20 through 21, further comprising: receiving, via the first channel state information report, the confidence level feedback request comprising a multi-bit indicator, the multi-bit indicator indicating a quantity of confidence values corresponding to the subset of the plurality of predicted channel quality values.
Aspect 23: The method of aspect 22, wherein the multi-bit indicator indicates a quantity of predicted channel quality values corresponding to the subset of the plurality of predicted channel quality values.
Aspect 24: The method of any of aspects 22 through 23, wherein each bit of the multi-bit indicator is associated with one of the plurality of predicted channel quality values.
Aspect 25: The method of any of aspects 20 through 24, wherein receiving the first channel state information report further comprises: receiving the first channel state information report comprising the confidence level feedback request based at least in part on a quantity of one or more highest predicted channel quality values of the plurality of predicted channel quality values being associated with respective confidence values failing to satisfy the threshold.
Aspect 26: A method for wireless communications at a network entity, comprising: transmitting one or more reference signals from a network entity via a plurality of resources for predicting channel quality during a time window; and receiving a channel state information report indicating one or more confidence values for a plurality of predicted channel quality values corresponding to respective resources of a plurality of resources, wherein the one or more confidence values are for a subset of the plurality of predicted channel quality values that fail to satisfy a threshold, and wherein receiving the channel state information report is based at least in part on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion.
Aspect 27: The method of aspect 26, further comprising: receiving, based at least in part on the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying the report triggering criterion, a first channel state information report indicating the plurality of predicted channel quality values and a confidence level feedback request; and transmitting, based at least in part on the confidence level feedback request, a trigger for a second channel state information report, wherein the second channel state information report comprises the channel state information report indicating the one or more confidence values.
Aspect 28: The method of any of aspects 26 through 27, wherein receiving the channel state information report comprises: receiving, based at least in part on the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying the report triggering criterion, the channel state information report indicating the plurality of predicted channel quality values, the one or more confidence values, and a set of resource identifiers corresponding to the one or more respective resources of the plurality of resources.
Aspect 29: The method of any of aspects 26 through 28, further comprising: transmitting control signaling comprising an indication of the threshold, the report triggering criterion, or both.
Aspect 30: The method of any of aspects 26 through 29, further comprising: receiving a confidence level feedback request based at least in part on a quantity of one or more highest predicted channel quality values of the plurality of predicted channel quality values being associated with respective confidence values failing to satisfy the threshold, wherein the channel state information report is received in response to transmitting a trigger for the channel state information report.
Aspect 31: An apparatus for wireless communications at a UE, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of any of aspects 1 through 7.
Aspect 32: An apparatus for wireless communications at a UE, comprising at least one means for performing a method of any of aspects 1 through 7.
Aspect 33: A non-transitory computer-readable medium storing code for wireless communications at a UE, the code comprising instructions executable by a processor to perform a method of any of aspects 1 through 7.
Aspect 34: An apparatus for wireless communications at a UE, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of any of aspects 8 through 19.
Aspect 35: An apparatus for wireless communications at a UE, comprising at least one means for performing a method of any of aspects 8 through 19.
Aspect 36: A non-transitory computer-readable medium storing code for wireless communications at a UE, the code comprising instructions executable by a processor to perform a method of any of aspects 8 through 19.
Aspect 37: An apparatus for wireless communications at a network entity, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of any of aspects 20 through 25.
Aspect 38: An apparatus for wireless communications at a network entity, comprising at least one means for performing a method of any of aspects 20 through 25.
Aspect 39: A non-transitory computer-readable medium storing code for wireless communications at a network entity, the code comprising instructions executable by a processor to perform a method of any of aspects 20 through 25.
Aspect 40: An apparatus for wireless communications at a network entity, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of any of aspects 26 through 30.
Aspect 41: An apparatus for wireless communications at a network entity, comprising at least one means for performing a method of any of aspects 26 through 30.
Aspect 42: A non-transitory computer-readable medium storing code for wireless communications at a network entity, the code comprising instructions executable by a processor to perform a method of any of aspects 26 through 30.
It should be noted that the methods described herein describe possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined.
Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB) , Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein.
Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed using a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor but, in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) .
The functions described herein may be implemented using hardware, software executed by a processor, firmware, or any combination thereof. If implemented using software executed by a processor, the functions may be stored as or transmitted using one or more instructions or code of a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) , or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD) , floppy disk and Blu-ray disc. Disks may reproduce data magnetically, and discs may reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media.
As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of” ) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. ”
The term “determine” or “determining” encompasses a variety of actions and, therefore, “determining” can include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, a database or another data structure) , ascertaining and the like. Also, “determining” can include receiving (e.g., receiving information) , accessing (e.g., accessing data stored in memory) and the like. Also, “determining” can include resolving, obtaining, selecting, choosing, establishing, and other such similar actions.
In the appended figures, similar components or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If just the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label, or other subsequent reference label.
The description set forth herein, in connection with the appended drawings, describes example configurations and does not represent all the examples that may be implemented or that are within the scope of the claims. The term “example” used herein means “serving as an example, instance, or illustration, ” and not “preferred” or “advantageous over other examples. ” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.
The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.

Claims

An apparatus for wireless communications at a user equipment (UE) , comprising:

a processor;

memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

receive one or more reference signals from a network entity via a plurality of resources for predicting channel quality;

transmit a first channel state information report comprising a plurality of predicted channel quality values corresponding to respective resources of the plurality of resources, the first channel state information report comprising a confidence level feedback request based at least in part on one or more confidence values for a subset of the plurality of predicted channel quality values failing to satisfy a threshold;

receive a trigger for a second channel state information report based at least in part on the confidence level feedback request; and

transmit, based at least in part on receiving the trigger, the second channel state information report comprising the one or more confidence values, each of the one or more confidence values corresponding to a respective resource of the plurality of resources.
The apparatus of claim 1, wherein the instructions are further executable by the processor to cause the apparatus to:

transmit, via the second channel state information report, a set of resource identifiers, each of the one or more confidence values corresponding to a respective resource identifier of the set of resource identifiers.
The apparatus of claim 1, wherein the instructions are further executable by the processor to cause the apparatus to:

transmit, via the first channel state information report, the confidence level feedback request comprising a multi-bit indicator, the multi-bit indicator indicating a quantity of confidence values corresponding to the subset of the plurality of predicted channel quality values.
The apparatus of claim 3, wherein:

each codepoint of the multi-bit indicator is associated with a different quantity of predicted channel quality values, and

a codepoint indicated by the multi-bit indicator in the first channel state information report indicates a quantity of predicted channel quality values corresponding to the subset of the plurality of predicted channel quality values.
The apparatus of claim 3, wherein each bit of the multi-bit indicator is associated with one of the plurality of predicted channel quality values.
The apparatus of claim 1, wherein the instructions are further executable by the processor to cause the apparatus to:

receive control signaling indicating a threshold portion of the plurality of resources;

select a subset of the plurality of resources based on the threshold portion; and

generate the one or more confidence values for the subset of the plurality of predicted channel quality values based at least in part on the selecting.
The apparatus of claim 6, wherein the instructions to select the subset of the plurality of resources are executable by the processor to cause the apparatus to:

select the subset of the plurality of resources corresponding to a highest predicted channel quality values and satisfying the threshold portion of the plurality of resources.
An apparatus for wireless communications at a user equipment (UE) , comprising:

a processor;

memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

receive one or more reference signals from a network entity via a plurality of resources for predicting channel quality;

generate a plurality of predicted channel quality values corresponding to respective resources of the plurality of resources during a time window, wherein one or more confidence values for a subset of the plurality of predicted channel quality values fail to satisfy a threshold; and

transmit a channel state information report comprising the one or more confidence values associated with one or more respective resources of the plurality of resources based at least in part on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion.
The apparatus of claim 8, wherein the instructions are further executable by the processor to cause the apparatus to:

transmit, based at least in part on the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying the report triggering criterion, a first channel state information report comprising the plurality of predicted channel quality values and a confidence level feedback request; and

receive, based at least in part on the confidence level feedback request, a trigger for a second channel state information report, wherein the second channel state information report comprises the channel state information report comprising the one or more confidence values.
The apparatus of claim 9, wherein transmitting the channel state information report comprising the one or more confidence values is based at least in part on receiving the trigger.
The apparatus of claim 8, wherein the instructions to transmit the channel state information report are executable by the processor to cause the apparatus to:

transmit, based at least in part on the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying the report triggering criterion, the channel state information report comprising the plurality of predicted channel quality values, the one or more confidence values, and a set of resource identifiers corresponding to the one or more respective resources of the plurality of resources.
The apparatus of claim 8, wherein the instructions are further executable by the processor to cause the apparatus to:

receive control signaling comprising an indication of the threshold, the report triggering criterion, or both.
The apparatus of claim 12, wherein the instructions to receive the control signaling are executable by the processor to cause the apparatus to:

receive first control signaling comprising an indication of a set of candidate threshold values, a set of candidate report triggering criteria, or both; and

receive second control signaling indicating a threshold value of the set of candidate threshold values, the report triggering criterion of the set of candidate report triggering criteria, or both.
The apparatus of claim 12, wherein the instructions to receive the control signaling are executable by the processor to cause the apparatus to:

receive first control signaling comprising a default threshold value, a default report triggering criterion, or both; and

receive second control signaling updating the default threshold value, the default report triggering criterion, or both.
The apparatus of claim 12, wherein the instructions are further executable by the processor to cause the apparatus to:

receive, via the control signaling, an indication of a serving cell, a bandwidth part, a channel state information reporting configuration, or a combination thereof, corresponding to the threshold, the report triggering criterion, or both.
The apparatus of claim 8, wherein the instructions are further executable by the processor to cause the apparatus to:

set a timer associated with the time window; and

reset the timer upon determining that the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfy the report triggering criterion prior to or upon expiration of the timer.
The apparatus of claim 16, wherein the instructions are further executable by the processor to cause the apparatus to:

reset the timer upon determining that a second quantity of an additional one or more confidence values fails to satisfy the threshold upon expiration of the timer; and

refrain from transmitting an additional channel state information report comprising confidence values for the second quantity of the additional one or more confidence values.
The apparatus of claim 8, wherein the instructions are further executable by the processor to cause the apparatus to:

receive control signaling indicating a threshold portion of the plurality of resources;

select a subset of the plurality of resources based on the threshold portion; and

generate the one or more confidence values for the subset of the plurality of predicted channel quality values based at least in part on the selecting.
The apparatus of claim 18, wherein the instructions to select the subset of the plurality of resources are executable by the processor to cause the apparatus to:

select the subset of the plurality of resources corresponding to a highest predicted channel quality values and satisfying the threshold portion of the plurality of resources.
An apparatus for wireless communications at a network entity, comprising:

a processor;

memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

transmit one or more reference signals to a user equipment (UE) via a plurality of resources for predicting channel quality;

receive a first channel state information report comprising a plurality of predicted channel quality values corresponding to respective resources of the plurality of resources, the first channel state information report comprising a confidence level feedback request based at least in part on one or more confidence values for a subset of the plurality of predicted channel quality values failing to satisfy a threshold;

transmit a trigger for a second channel state information report based at least in part on the confidence level feedback request; and

receive, based at least in part on receiving the trigger, the second channel state information report comprising the one or more confidence values, each of the one or more confidence values corresponding to a respective resource of the plurality of resources.
The apparatus of claim 20, wherein the instructions are further executable by the processor to cause the apparatus to:

receive, via the second channel state information report, a set of resource identifiers, each of the one or more confidence values corresponding to a respective resource identifier of the set of resource identifiers.
The apparatus of claim 20, wherein the instructions are further executable by the processor to cause the apparatus to:

receive, via the first channel state information report, the confidence level feedback request comprising a multi-bit indicator, the multi-bit indicator indicating a quantity of confidence values corresponding to the subset of the plurality of predicted channel quality values.
The apparatus of claim 22, wherein:

each codepoint of the multi-bit indicator is associated with a different quantity of predicted channel quality values, and

a codepoint indicated by the multi-bit indicator in the first channel state information report indicates a quantity of predicted channel quality values corresponding to the subset of the plurality of predicted channel quality values.
The apparatus of claim 22, wherein each bit of the multi-bit indicator is associated with one of the plurality of predicted channel quality values.
The apparatus of claim 20, wherein the instructions are further executable by the processor to cause the apparatus to:

transmit control signaling indicating a threshold portion of the plurality of resources, wherein receiving the second channel state information report is based at least in part on the control signaling indicating the threshold portion of the plurality of resources.
An apparatus for wireless communications at a network entity, comprising:

a processor;

memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

transmit one or more reference signals from a network entity via a plurality of resources for predicting channel quality during a time window; and

receive a channel state information report comprising one or more confidence values for a plurality of predicted channel quality values corresponding to respective resources of a plurality of resources, wherein the one or more confidence values are for a subset of the plurality of predicted channel quality values that fail to satisfy a threshold, and wherein receiving the channel state information report is based at least in part on a quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying a report triggering criterion.
The apparatus of claim 26, wherein the instructions are further executable by the processor to cause the apparatus to:

receive, based at least in part on the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying the report triggering criterion, a first channel state information report comprising the plurality of predicted channel quality values and a confidence level feedback request; and

transmit, based at least in part on the confidence level feedback request, a trigger for a second channel state information report, wherein the second channel state information report comprises the channel state information report comprising the one or more confidence values.
The apparatus of claim 26, wherein the instructions to receive the channel state information report are executable by the processor to cause the apparatus to:

receive, based at least in part on the quantity of the one or more confidence values that fail to satisfy the threshold during the time window satisfying the report triggering criterion, the channel state information report comprising the plurality of predicted channel quality values, the one or more confidence values, and a set of resource identifiers corresponding to the one or more respective resources of the plurality of resources.
The apparatus of claim 26, wherein the instructions are further executable by the processor to cause the apparatus to:

transmit control signaling comprising an indication of the threshold, the report triggering criterion, or both.
The apparatus of claim 26, wherein the instructions are further executable by the processor to cause the apparatus to:

transmit control signaling indicating a threshold portion of the plurality of resources, wherein receiving the channel state information report is based at least in part on transmitting the control signaling indicating the threshold portion of the plurality of resources.