CSI report
By employing AI/ML models for UE-side CSI derivation and reporting multiple sets, the CSI reporting mechanisms address inefficiencies, enhancing network scheduling and resource allocation efficiency in wireless communication systems.
Patent Information
- Application Number
- PCT/CN2024/077077
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-02-08
- Publication Date
- 2025-08-14
AI Technical Summary
Existing wireless communication systems face inefficiencies in channel status information (CSI) reporting, particularly in the integration of AI/ML models for UE-side CSI derivation and reporting, which can lead to suboptimal resource allocation and scheduling.
Implementing mechanisms for CSI reporting using AI/ML models at both the UE and base station, where the UE derives and reports multiple sets of CSI, with prioritization and differentiated handling based on time instances, ensuring reliable and efficient communication.
Enhances the reliability and efficiency of radio resource allocation by prioritizing and managing CSI reports, improving network scheduling and reducing overhead through AI/ML-driven CSI derivation and reporting.
Smart Images

Figure CN2024077077_14082025_PF_FP_ABST
Abstract
Description
CSI REPORTTECHNICAL FIELD
[0001] This disclosure generally relates to handling transmissions in a wireless cellular access network and is specifically directed to mechanisms for performing Channel Status Information (CSI) reporting.BACKGROUND
[0002] Artificial Intelligence / Machine Learning (AI / ML) is a promising enhancement direction for mobile communication system, e.g., 5G (fifth generation) , 5G-A (5G-Advanced) and 6G (sixth generation) . With the introduction of AI / ML technology into the mobile communication system, the system operating efficiency is expected to be improved, for example, by reducing the overhead of reference signals via AI / ML inference and prediction.
[0003] For a communication system with AI / ML technology, an AI / ML model is adopted, for example, to perform inference. Generally, a model may refer to a functionality, function, functionality module, function module, processing method, information processing method, implementation, feature, feature group, configuration, configuration set, dataset (e.g., for model training) , or data-driven algorithms. Generally, these models are performed, calculated, or processed by User Equipment (UE) , but may also be performed at a base station. In various examples, a model may be a data driven algorithm that applies AI / ML techniques to generate a set of outputs based on a set of inputs. Alternatively, a model can be linear or non-linear algorithms or combination of both algorithms. In addition, functionality may refer to a feature enabled by the AI / ML model. Alternatively, functionality may refer to a set of parameters or configurations for one feature. For example, a UE may adopt a convolutional neural network (CNN) model to predict the beams for the communication, and the CNN model is the model and the beam prediction is the functionality. Different models and / or functionalities may be associated with different configurations (e.g., Radio Resource Control (RRC) configuration) . Model activation may refer to activating the corresponding configuration for the UE. Similarly, model deactivation, switching, and fallback may refer to deactivating the corresponding configuration, switching the configuration, and falling back to a configuration without the model, respectively.SUMMARY
[0004] This disclosure generally relates to handling transmissions in a wireless cellular access network and is specifically directed to mechanisms for performing CSI reporting. IN some embodiments, the CSI report may be an output of an AI / ML model, for example, performed on the UE side.
[0005] In various embodiments, a base station transmits CSI-RS (Channel State Information-Reference Signal) to the UE. The UE may then measure the CSI-RS and derives the CSI. The CSI can be PMI (Precoding Matrix Indicator) , CQI (Channel Quality Indicator) , RSRP (Reference Signal Received Power) , RSRQ (Reference Signal Received Quality) , SINR (Signal Interference Noise Ratio) , Reference signal indicator, etc. The UE may derive the CSI by an AI / ML model. Then, the UE may report the CSI to the base station, wherein the base station may perform scheduling based on the CSI, e.g., determining the coding rate and modulation order, etc.
[0006] In some exemplary implementations, a method performed by a wireless access network node (WANN) (e.g., a base station) includes transmitting, to the wireless terminal device (e.g., a UE) , a CSI-RS, and receiving, from the wireless terminal device, two sets of CSI reports. Similarly, a method performed by the wireless terminal device includes receiving, from the WANN, the CSI-RS, and transmitting, to the WANN, two sets of CSI reports. In various examples, a first set of CSI is included in the first set of CSI reports, and a second set of CSI is included in the second set of CSI reports, wherein the first set of CSI includes CSI for Q1 time instances, and the second set of CSI includes CSI for Q2 time instances, wherein Q1 and Q2 are integer numbers larger than 0, and wherein Q1 is not larger than Q2, and wherein the Q1 time instances are earlier than the Q2 time instances. In some examples, Q1 is equal to 1, and Q2 is larger than 1. In some examples, the Q1 time instances are no later than a time point T, and the Q2 time instances are after the time point T.
[0007] In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the methods may include the wireless terminal device deriving the first set of CSI based on channel metrics for the Q1 time instances, and deriving the second set of the CSI based on the channel metrics for the Q1 time instances and channel metrics for Q3 time instances, where Q3 is an integer number larger than 0, and wherein the Q3 time instances are earlier than the Q1 time instances. The methods may further include the WANN transmitting, and the wireless terminal device receiving, the CSI-RS at the Q1 time instances and the Q3 time instances, and the wireless terminal device deriving the channel metrics for the Q1 time instances and the Q3 time instances.
[0008] In some exemplary implementations, the time point T can be determined as one of the following alternatives:
[0009] Alt. 1: The slot of CSI reference resource corresponding to the CSI reports;
[0010] Alt. 2: The last slot or symbol containing the last CSI-RS corresponding to the CSI reports;
[0011] Alt. 3: The last slot or symbol containing the CSI reports; or
[0012] Alt. 4: The last slot or symbol containing the command from base station triggering the CSI-RS or CSI reports.
[0013] In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the methods may include the WANN deriving the channel metrics for the Q1 time instances based on the first set of CSI, and / or deriving the channel metrics for the Q2 time instances based both the first set of CSI and the second set of CSI. In various examples, the Q1 time instances are time instances for a last CSI-RS resource corresponding to the CSI reports.
[0014] In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the methods may include the first set of CSI having a higher priority than the second set of CSI. The methods may also include the wireless terminal device transmitting, and the WANN receiving, the first set of CSI and the second set of CSI on a same PUCCH or PUSCH transmission, or on different PUCCH and / or PUSCH transmissions in different time or frequency resources. In a more specific embodiment the methods may include the wireless terminal device transmitting, and the WANN receiving the first set of CSI on PUCCH, and the second set of CSI on PUSCH. The methods may also include the wireless terminal device transmitting, and the WANN receiving, the first set of CSI with repetition or retransmission, and the second set of CSI only once. In various examples, the first set of CSI applies a modulation order that is lower than a modulation order for the second set of CSI. In various examples, the first set of CSI applies a lower coding rate than a coding rate for the second set of CSI. In various examples, two CQIs are included in the CSI reports, wherein a first CQI is for the Q1 time instances and is included in the first set of CSI, and wherein a second CQI is for the Q2 time instances and is included in the second set of CSI. In various examples, the first CQI is included in the first CSI report, and the second CQI is included in the second CSI report. In various examples, the first CQI includes both wideband CQI and subband CQI, while the second CQI only includes wideband CQI.
[0015] In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the methods may include the wireless terminal device performing separate performance monitoring for the first set of CSI and the second set of CSI. The methods may also include the WANN indicating, and the wireless terminal device receiving an indication to report a performance monitoring result of at least one of the following options: a performance monitoring result of the first set of CSI; a performance monitoring result of the second set of CSI; a performance monitoring result of both the first set of CSI and the second set of CSI; and / or a performance monitoring result of a model. In various examples, the performance monitoring results of the first set of CSI or the second set of CSI can be a system throughput, a ground-truth CSI, or a similarity metric. The methods may include the WANN indicating, and the wireless terminal device receiving an indication to report the ground-truth CSI for the first set of CSI report and / or the second set of CSI report. The methods may include the WANN indicating, and the wireless terminal device receiving an indication to report a similarity metric for the first set of CSI report and / or the second set of CSI report. The methods may include the WANN indicating, and the wireless terminal device receiving an indication to report the performance monitoring result of the model, and configuring two parameters (r1 and r2) , wherein r1 and r2 are larger than 0 and smaller than 1, and wherein r1+r2=1. In various examples, the performance monitoring result of the model can be a similarity metric of a model that is calculated as r1·S1+r2·S2, where S1 and S2 are the similarity metrics for the first set of CSI report and the second set of CSI report, respectively.
[0016] In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the methods may include the WANN managing the model, and the wireless terminal device receiving management of the model, based on reported contents of the performing monitoring, wherein the management includes at least one of the following:
[0017] the WANN indicating to the wireless terminal device to suspend the first set of CSI or the second set of CSI;
[0018] the WANN indicating to the wireless terminal device to suspend the first set of CSI and the second set of CSI;
[0019] the WANN indicating to the wireless terminal device to resume the first set of CSI or the second set of CSI;
[0020] the WANN indicating to the wireless terminal device to resume the first set of CSI and the second set of CSI;
[0021] the WANN indicating to the wireless terminal device to activate the first set of CSI or the second set of CSI;
[0022] the WANN indicating to the wireless terminal device to activate the first set of CSI and the second set of CSI;
[0023] the WANN indicating to the wireless terminal device to deactivate the first set of CSI or the second set of CSI;
[0024] the WANN indicating to the wireless terminal device to deactivate the first set of CSI and the second set of CSI;
[0025] the WANN indicating to the wireless terminal device to update the first set of CSI or the second set of CSI; and / or
[0026] the WANN indicating to the wireless terminal device to update the first set of CSI and the second set of CSI.
[0027] In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the methods may include the WANN transmitting, and the wireless terminal device receiving, a command to trigger M CSI-RS resource reception, and to trigger P CSI reports, wherein the P CSI reports include CSI for K time instances, wherein M, P, and K are integer number, where M is larger than 1, P is larger than 0, K is larger than 0, and P is not larger than K, wherein the P CSI reports are transmitted in different time resources and / or different frequency resources. In various examples, the P CSI reports may be transmitted in different slots. In various examples, the command can be DCI or MAC-CE.
[0028] In various examples of the methods, the CSI for the K time instances are mapped to the P CSI reports with the following rule: when P is larger than 1, only one CSI with a highest priority is included in a first CSI report, and wherein CSI for the remaining K-1 time instances are mapped to the remaining P-1 CSI reports with one of the following alternatives:
[0029] CSI for a first number X time instances with higher priority is included in a second CSI report, wherein CSI for a second number Y time instances is included in each of the CSI report other than the first CSI report and the second CSI report, where X and Y are integer number larger than 0, and X is not larger than Y; or
[0030] CSI for the first number X time instances with higher priority is included in a last CSI report, wherein CSI for the second number of Y time instances is included in each of the CSI report other than the first CSI report and the last CSI report, where X and Y are integer number larger than 0, and X is not larger than Y.
[0031] In other examples of the methods, the CSI for the K time instances are mapped to the P CSI reports with the following rule: CSI for K mod P time instances with higher priority are included in a first CSI report, in response to K mod P being larger than 0, wherein each of any remaining CSI reports includes CSI for time instances, wherein CSI with higher priority is mapped in earlier CSI report.
[0032] In other examples of the methods, the CSI for the K time instances are mapped to the P CSI reports with the following rule: each CSI report includes CSI for time instances, except for a last CSI report, wherein the last CSI report includes CSI for K mod P time instances in response to K mod P being larger than 0, wherein CSI with higher priority are mapped in an earlier CSI report.
[0033] In various examples, of the methods, a priority of the P CSI reports is determined by one of the following alternatives:
[0034] a CSI for an earlier time instance has a higher priority than a CSI for a later time instance;
[0035] a CSI for a time instance with a higher quality has a higher priority than a CSI for a time instance with lower quality, wherein the quality can be an accuracy probability; or
[0036] a CSI for a time instance with a higher channel quality has a higher priority than a CSI for a time instance with a lower channel quality, wherein the channel quality can be Channel Quality Indicator (CQI) , Reference Signals Received Power (RSRP) , or Signal to Interference & Noise Ratio (SINR) .
[0037] In some other implementations, an apparatus for wireless communication such as a network device is disclosed. The network device may include one or more processors and one or more memories, wherein the one or more processors are configured to read computer code from the one or more memories to implement any one of the methods above. The apparatus for wireless communication may be the wireless access network node (e.g., base station) or the wireless terminal device (e.g., UE) .
[0038] In yet some other implementations, a computer program product is disclosed. The computer program product may include a non-transitory computer-readable medium with computer code stored thereupon, the computer code, when executed by one or more processors, causing the one or more processors to implement any one of the methods above.
[0039] The above embodiments and other aspects and alternatives of their implementations are explained in greater detail in the drawings, the descriptions, and the claims below.BRIEF DESCRIPTION OF THE DRAWINGS
[0040] FIG. 1 shows a wireless access network with an exemplary uplink, downlink, and control channel configuration.
[0041] FIG. 2 shows various example processing components of the wireless terminal device and the wireless access network node of FIG. 1.
[0042] FIG. 3 shows an example block diagram illustrating creation of CSI using an AI / ML model at the UE in accordance with various embodiments.
[0043] FIG. 4 shows an example block diagram illustrating deriving channel metrics using an AI / ML model at the base station in accordance with various embodiments.
[0044] FIG. 5 shows a flow diagram illustrating operations and communications performed at and between the base station and the UE in accordance with various embodiments.
[0045] FIG. 6 shows an example communication diagram of communications between the base station and the UE in accordance with various examples.DETAILED DESCRIPTION
[0046] The technology and examples of implementations and / or embodiments described in this disclosure can be used to facilitate over-the-air radio resource allocation, configuration, and signaling in wireless access networks as well as operational configuration of a UE and / or a base station within the wireless access networks. The term “exemplary” is used to mean “an example of” and unless otherwise stated, does not imply an ideal or preferred example, implementation, or embodiment. Section headers are used in the present disclosure to facilitate understanding of the disclosed implementations and are not intended to limit the disclosed technology in the sections only to the corresponding section. The disclosed implementations may be further embodied in a variety of different forms and, therefore, the scope of this disclosure or claimed subject matter is intended to be construed as not being limited to any of the embodiments set forth below. The various implementations may be embodied as methods, devices, components, systems, or non-transitory computer readable media. Accordingly, embodiments of this disclosure may, for example, take the form of hardware, software, firmware or any combination thereof.
[0047] This disclosure is directed to handling transmissions in a wireless cellular access network and is specifically directed to mechanisms for performing CSI reporting.
[0048] Wireless Network Overview
[0049] A wireless communication network may include a radio access network for providing network access to wireless terminal devices, and a core network for routing data between the access networks or between the wireless network and other types of data networks. In a wireless access network, radio resources are provided for allocation and used for transmitting data and control information. FIG. 1 shows an exemplary wireless access network 100 including a wireless access network node (WANN) or wireless base station 102 (herein referred to as wireless base station, base station, wireless access node, wireless access network node, or WANN) and a wireless terminal device or user equipment (UE) 104 (herein referred to as user equipment, UE, terminal device, or wireless terminal device) that communicates with one another via over-the-air (OTA) radio communication resources 106. The wireless access network 100 may be implemented as, as for example, a 2G, 3G, 4G / LTE, or 5G cellular radio access network. Correspondingly, the base station 102 may be implemented as a 2G base station, a 3G node B, an LTE eNB, or a 5G New Radio (NR) gNB. The user equipment 104 may be implemented as mobile or fixed communication devices installed with mobile identity modules for accessing the base station 102. The user equipment 104 may include but is not limited to mobile phones, laptop computers, tablets, personal digital assistants, wearable devices, distributed remote sensor devices, and desktop computers. Alternatively, the wireless access network 100 may be implemented as other types of radio access networks, such as Wi-Fi, Bluetooth, ZigBee, and WiMax networks.
[0050] FIG. 2 further shows example processing components of the WANN 102 and the UE 104 of FIG. 1. The UE 104, for example, may include transceiver circuitry 206 coupled to one or more antennas 208 to effectuate wireless communication with the WANN 102 (or to other UEs) . The transceiver circuitry 206 may also be coupled to a processor 210, which may also be coupled to a memory 212 or other storage devices. The memory 212 may be transitory or non-transitory and may store therein computer instructions or code which, when read and executed by the processor 210, cause the processor 210 to implement various ones of the, functions, methods, and processes of the UE 104 described herein. The memory 212 may also store therein, and the processor 210 may also be configured to execute one or more models (e.g., Artificial Intelligence / Machine Learning (AI / ML) models) to perform one or more functionalities (e.g., AI / ML functionalities) . The memory 212 may also be utilized and allocated for buffering UL and DL transmissions in each band / carrier. The memory 212 may include multiple memory modules assigned to different functions (such as program memory, base band memory, and / or RF memory, to name a few) . Likewise, the WANN 102 may include transceiver circuitry 214 coupled to one or more antennas 216, which may include an antenna tower 218 in various forms, to effectuate wireless communications with the UE 104. The transceiver circuitry 214 may be coupled to one or more processors 220, which may further be coupled to a memory 222 or other storage devices. The memory 222 may be transitory or non-transitory and may store therein instructions or code that, when read and executed by the one or more processors 220, cause the one or more processors 220 to implement various functions, methods, and processes of the WANN 102 described herein.
[0051] Wireless Communication Resource Scheduling / Signaling
[0052] Returning to FIG. 1, the radio communication resources for the over-the-air interface 106 may include a combination of frequency, time, and / or spatial communication resources organized into various resource units or elements in frequency, time, and / or space. The radio communication resources 106 in frequency domain may include portions of licensed radio frequency bands, portions of unlicensed ration frequency bands, or portions of a mix of both licensed and unlicensed radio frequency bands. The radio communication resources 106 available for carrying the wireless communication signals between the base station 102 and user equipment 104 may be further divided into physical downlink channels 110 for transmitting wireless signals from the base station 102 to the user equipment 104 and physical uplink channels 120 for transmitting wireless signals from the user equipment 104 to the base station 102. The physical downlink channels 110 may further include physical downlink control channels (PDCCHs) 112 and physical downlink shared channels (PDSCHs) 114. Likewise, the physical uplink channels 120 may further include physical uplink control channels (PUCCHs) 122 and physical uplink shared channels (PUSCHs) 124. For simplification, other types of downlink and uplink channels are not shown in FIG. 1 but are within the scope of the current disclosure. The control channels PDCCHs 112 and PUCCHs 122 may be used for carrying control information in the form of control messages 116 and 126, herein referred to as Downlink Control Information (DCI) messages or Uplink Control Information (UCI) messages. The shared channels (shared between data and control information) PDSCHs 114 and PUSCHs 124 may be allocated and used for communicating downlink data transmissions 118 and uplink data transmissions 128 between the base station 102 and the user equipment 104.
[0053] The allocation and configuration of the radio communication resources associated with the data channels, such as the PDSCHs and the PUSCHs may be provided by one or more resource scheduling DCIs carried in the PDCCHs. The PDCCHs may be shared by a plurality of UEs in the access network. In various approaches, a particular UE may be configured to perform blind decode procedures on a preconfigured UE-specific Search Space (USS) to detect and identify a payload of a resource scheduling DCI carried in the PDCCH that specifically targets the particular UE. The blind decoding may be performed on preconfigured monitoring occasions of the PDCCH associated with USS. Such monitoring occasions may be referred to as a set of PDCCH candidates. Each PDCCH candidate may be associated with a set of Control Channel Elements (CCEs) . The UE may specifically use its Radio Network Temporary Identifier (RNTI) to decode the PDCCH candidates. The RNTI may be used to demask a PDCCH candidate’s CRC. If no CRC error is detected, the UE determines that PDCCH candidate carries its own control information. The UE may then process the DCI and extract the resource allocation information pertaining to the PDSCH and / or PUSCH for receiving and / or transmitting data.
[0054] Description of New Mechanisms for Performing CSI Reporting
[0055] In accordance with various embodiments, a base station 102 transmits Channel State Information-Reference Signal (CSI-RS) to the UE 104. The UE 104 may derive, for example, two sets of channel metrics. The channel metrics can be, though is not limited to, channel matrix or eigenvectors of the channel matrix. The first set of channel metrics includes M1 channel metrics, where M1 is positive integer number. The second set of channel metrics includes M2 channel metrics, where M2 is positive integer number. The second set of channel metrics corresponds to time instances earlier than the first set of channel metrics. Typically, M1 is not larger than M2. In one particular embodiment, M1 is equal to 1 and M2 is larger than 1.
[0056] For example, the first set of channel metrics may include one eigenvector of the channel matrix for time instance Z, and the second set of channel metrics includes may include three eigenvectors of the channel matrix for time instance Z, Z-1 and Z-2.
[0057] The first set of channel metrics and the second set of channel metrics may be input into the model (e.g., AI / ML model) to derive two sets of CSI. The first set of CSI may correspond to the same time instances as the corresponding time instances for the first set of channel metrics. The second set of CSI may correspond to time instances later than the first set of CSI. The UE 104 may transmit two CSI reports to the base station 102, where the first CSI report and second CSI report include the first set of CSI and the second set of CSI, respectively. The base station 102 may then derive the channel metrics based on the CSI transmitted from UE 104.
[0058] The two CSI reports may be carried by the same Physical Uplink Control Channel (PUCCH) or Physical Uplink Shared Channel (PUSCH) transmission, or can be carried by different PUCCH or PUSCH in different time or frequency resources.
[0059] The following alternatives can be considered.
[0060] Alt. 1-1: The UE 104 derives the first set of CSI based on the first set of channel metrics. The base station 102 derives the first set of channel metrics based on the first set of CSI.
[0061] Alt. 1-2: The UE 104 derives the first set of CSI based on the first set of channel metrics and the second set of channel metrics. The base station 102 derives the first set of channel metrics based on the first set of CSI and the second set of CSI.
[0062] The following alternatives can also be considered.
[0063] Alt. 2-1: The UE 104 derives the second set of CSI based on the second set of channel metrics. The base station 102 derives the second set of channel metrics based on the second set of CSI.
[0064] Alt. 2-2: The UE 104 derives the second set of CSI based on the first set of channel metrics and the second set of channel metrics. The base station 102 derives the second set of channel metrics based on the first set of CSI and the second set of CSI.
[0065] FIG. 3 illustrates an example block diagram illustrating creation of CSI using an AI / ML model at the UE 104 in accordance with at least one example. In the example of FIG. 3, two sets of channel metrics are input into the AI / ML model at the UE 104 side. The first set of channel metrics includes the eigenvector of the channel matrix for slot 4. The second set of channel metrics includes the eigenvector of the channel matrix for slot 1, slot 2, and slot 3. In this example, the UE 104 derives the CSI for slot 4 based on the eigenvector of channel matrix for slot 4, e.g., the AI / ML model at the UE side compresses the eigenvector of channel matrix for slot 4. In this example, the UE 104 also derives the CSI for slot 5, slot 6, and slot 7 based on the eigenvector of the channel matrix for slot 1, slot 2, slot 3, and slot 4, e.g., the AI / ML model at the UE side predicts the CSI for the subsequent slots. The UE 104 then reports the CSI for slot 4, slot 5, slot 6, and slot 7 to the base station 102.
[0066] FIG. 4 illustrates an example block diagram illustrating deriving channel metrics using an AI / ML model at the base station 102 in accordance with at least one example. As shown in FIG. 4, the base station 102 receives the CSI for slot 4, slot 5, slot 6, and slot 7. The base station 102 then derives the channel metrics for slot 4 (i.e., eigenvector of channel matrix for slot 4 in this example) based on the CSI for slot 4. The base station 102 also derives the channel metrics for slot 5, slot 6, and slot 7 (i.e., eigenvector of channel matrix for slot 5, slot 6, and slot 7 in this example) based on the CSI for slot 4, slot 5, slot 6, and slot 7. The base station 102 may then perform the scheduling based on the channel metrics.
[0067] In various examples, the UE 104 transmits the two CSI reports to the base station 102, where two sets of CSI (i.e., the first set of CSI and the second set of CSI) are included in the first CSI report and the second CSI report, respectively. The first set of CSI includes CSI for Q1 time instances, and the second set of CSI includes CSI for Q2 time instances. Q1 and Q2 are integer numbers larger than 1. Q1 is not larger than Q2. In various specific embodiments, Q1 is equal to 1 and Q2 is larger than 1, however Q1 may be larger than 1 in other examples. In the examples discussed above with respect to FIGS. 3 and 4, the Q1 time instances equaled to 1 (e.g., slot 4) , while the Q2 time instances equals to 3 (e.g., slots 5, 6, and 7) . The Q1 time instances for the first set of CSI may be before a time point T, and the Q2 time instances for the second set of CSI may be after the time point T. The time point T will be discussed in the embodiments below.
[0068] In this document, we mainly present embodiments for the case when Q1 is equal to 1 and Q2 is larger than 1. But it can also be applied to other cases, e.g., wherein Q1 is larger than 1, and / or Q2 is 1.
[0069] In this document, we mainly present embodiments for the case when two sets of CSI are included in the CSI reports. However, it can also be applied to the case when more than two sets of CSI are included in the CSI reports. The UE 104 may transmit CSI reports to the base station 102, where P sets of CSI are included in the P CSI reports, respectively. P is integer number larger than 1. The kth set of CSI includes CSI for Qk time instances, where k is an index of the P sets of CSI, and k is an integer number satisfying 1≤k≤P. Qk is a positive integer number. Q1 is not larger than min {Q2, Q3, …, QP} . The Q1 time instances for the first set of CSI is before a time point T, and the rest of the time instances for the rest of the CSI is after the time point T. The time point T will be discussed in the embodiments below.
[0070] In this document, the embodiments are mainly described by CSI-RS. But it can also be applied to other refrence signals as well, e.g., DMRS.
[0071] CSI Report With Multiple Sets of CSI
[0072] In one embodiment, the base station 102 transmits CSI-RS to the UE 104. The UE 104 derives CSI based on the CSI-RS. The UE 104 transmits two CSI reports to the base station 102, where two sets of CSI (i.e., the first set of CSI and the second set of CSI) are included in the two CSI reports, respectively. In other words, the first set of CSI is included in the first set of CSI reports, the second set of CSI is included in the second set of CSI report. The first set of CSI includes CSI for Q1 time instances and the second set of CSI includes CSI for Q2 time instances. Q1 and Q2 are integer numbers larger than 0. Q1 is not larger than Q2. The Q1 time instances are earlier than the Q2 time instances. In some examples, Q1 is equal to 1 and Q2 is larger than 1, though this is not always the case.
[0073] The Q1 time instances may be before a time point T and the Q2 time instances may be after the time point T. Alternatively, the Q1 time instances are no later than the time point T, and the Q2 time instances are after the time point T. In yet another alternative, the Q1 time instances are before a time point T, and the Q2 time instances are not earlier than the time point T.
[0074] The Q1 and Q2 may be configured by the base station 102 via high layer configuration, indicated by the UE 104 to the base station 102, or determined by the model. Different models may be configured with different Q1 and Q2.
[0075] In one embodiment, the UE 104 derives the first set of CSI based on the channel metrics for the Q1 time instances. The UE 104 derives the second set of the CSI based on the channel metric for Q3 time instances, where Q3 is an integer number larger than 0. The Q3 time instances are earlier than the Q1 time instances. In the examples of FIGS. 3 and 4, the Q3 time instance represent slots 1-3. Alternatively, the UE 104 derives the second set of the CSI based on both of the channel metric for the Q3 time instances and the channel metric for the Q1 time instances. The UE 104 predicts the channel metric for the Q2 time instances based on the channel metric for the Q1 and Q3 time instances, and the UE 104 compresses the channel metrics for the Q2 time instances into the second set of CSI.
[0076] In one embodiment, the base station 102 transmits CSI-RS to the UE 104 at the Q1 time instances and the Q3 time instances. The UE 104 receives the CSI-RS and derives the channel metrics for the Q1 time instances and the Q3 time instances.
[0077] In accordance with the present disclosure, methods are disclosed for a base station 102 to manage models executed on a UE 104 side based on the UE’s 104 capabilities. In various embodiments, the UE 104 may indicate to the base station 102, and the base station may receive, an indication of the UE’s model related capabilities. The model related capability may include at least one of the following:
[0078] As such, in accordance with various embodiments, a method performed by the WANN 102 (e.g., wireless base station 102) includes transmitting, to the wireless terminal device 104 (e.g., UE 104) , a CSI-RS, and receiving, from the wireless terminal device 104, two sets of CSI reports. Similarly, a method performed by the wireless terminal device 104 (e.g., UE 104) includes receiving, from the WANN 102, the CSI-RS, and transmitting, to the WANN 102, two sets of CSI reports. In various examples, a first set of CSI is included in the first set of CSI reports, and a second set of CSI is included in the second set of CSI reports, wherein the first set of CSI includes CSI for Q1 time instances, and the second set of CSI includes CSI for Q2 time instances, wherein Q1 and Q2 are integer numbers larger than 0, and wherein Q1 is not larger than Q2, and wherein the Q1 time instances are earlier than the Q2 time instances. In some examples, Q1 is equal to 1, and Q2 is larger than 1. In some examples, the Q1 time instances are no later than a time point T, and the Q2 time instances are after the time point T.
[0079] In some embodiments, the methods may include the wireless terminal device 104 deriving the first set of CSI based on channel metrics for the Q1 time instances, and deriving the second set of the CSI based on the channel metrics for the Q1 time instances and channel metrics for Q3 time instances, where Q3 is an integer number larger than 0, and wherein the Q3 time instances are earlier than the Q1 time instances.
[0080] In some embodiments, the methods may include the WANN 102 transmitting, and the wireless terminal device 104 receiving, the CSI-RS at the Q1 time instances and the Q3 time instances, and the wireless terminal device 104 deriving the channel metrics for the Q1 time instances and the Q3 time instances.
[0081] The time point T can be determined as one of the following alternatives:
[0082] Alt. 1: The slot of CSI reference resource corresponding to the CSI reports;
[0083] Alt. 2: The last slot or symbol containing the last CSI-RS corresponding to the CSI reports;
[0084] Alt. 3: The last slot or symbol containing the CSI reports; or
[0085] Alt. 4: The last slot or symbol containing the command from base station triggering the CSI-RS or CSI reports.
[0086] An offset can also be applied to the above alternatives. For example, 1 slot (i.e., offset is equal to 1 slot) before the slot of CSI reference resource corresponding to the CSI reports, or 1 slot (i.e., offset is equal to 1 slot) after the slot of CSI reference resource corresponding to the CSI reports.
[0087] In various embodiments, the base station 102 may derive the channel metrics for the Q1 time instances based on the first set of CSI. In one embodiment, the UE 104 compresses the channel metric via AI / ML model and the output of this compression is the first set of CSI. The base station 102 receives the first set of CSI, and may derive the channel metrics for the Q1 time instances based the first set of CSI. The base station 102 may derive the channel metrics for the Q2 time instances based on the second set of CSI or based on both the first set of CSI and the second set of CSI.
[0088] In one embodiment, the Q1 time instances are the time instances for the CSI-RS resources corresponding to the CSI reports. In another embodiment, the Q1 time instances are the time instances for the last CSI-RS resource corresponding to the CSI reports. In this case, the UE 104 may not need to report the time information for the Q1 time instances, e.g., in case when Q1 is equal to 1.
[0089] However, the UE 104 may need to report the timing information for the Q2 time instances to the base station 102. Otherwise, the base station 102 and the UE 104 may have different understandings on the timing information of the Q2 time instances. The timing information for the Q2 time instances can be defined within a time window and a gap between two time instances. The base station 102 may indicate the starting time and the length of the time window, and indicate the gap to the UE 104. The UE 104 may derive the Q2 time instances based on the starting time and the length of the time window, and the gap.
[0090] As such, in various embodiments, the methods may include the WANN 102 deriving the channel metrics for the Q1 time instances based on the first set of CSI, and / or deriving the channel metrics for the Q2 time instances based both the first set of CSI and the second set of CSI. In various examples, the Q1 time instances are time instances for a last CSI-RS resource corresponding to the CSI reports.
[0091] FIG. 5 illustrates a flow diagram illustrating operations and communications performed at and between the base station 102 and the UE 104 in accordance with various examples. The basic assumptions of FIG. 5 are the same or similar to FIGS. 3 and 4. In this example, the base station 102 transmits CSI-RS to the UE 104 at slot 1, slot 2, slot 3, and slot 4. The UE 104 receives the CSI-RS and derives the channel metrics as the input to the AI / ML model at the UE 104 side. The first set of channel metrics contains the channel metrics for slot 4, and the second set of channel metrics contains the channel metrics for slot 1, slot 2, and slot 3. Two sets of CSI are derived by the AI / ML model at the UE 104 side, where the first set of CSI contains the CSI for slot 4 and the second set of CSI contains the CSI for slot 5, slot 6, and slot 7. Basically, the UE 104 constructs or compresses the channel metrics for slot 4 and derives the CSI for slot 4. The UE 104 predicts the channel metrics for slot 5, slot 6, and slot 7 and constructs or compresses the channel metrics into CSI. The UE 104 reports the two sets of CSI to the base station 102. The base station 102 derives the channel metrics for slot 4, slot 5, slot 6, and slot 7 via the AI / ML model at the base station 102 side. The base station 102 performs data scheduling at slot 7 according to the channel metrics for these slots accordingly.
[0092] Details of CSI
[0093] Because the Q1 time instances are earlier than the Q2 time instances, the CSI for the Q1 time instances are more important for the network scheduling. The following methods can be applied to guarantee the reliability of the first set of CSI.
[0094] In one embodiment, the first set of CSI has a higher priority than the second set of CSI. For example, in case of resource shortage or resource collision, the first set of CSI is prioritized compared to the second set of CSI.
[0095] In one embodiment, the two sets of CSI may be carried by the same Physical Uplink Control Channel (PUCCH) or Physical Uplink Shared Channel (PUSCH) transmission, or can be carried by different PUCCH and / or PUSCH in different time or frequency resources. Further, the two sets of CSI may be two separate parts of the same CSI report, or two different CSI reports.
[0096] The two CSI reports may be carried by the same PUCCH or PUSCH transmission, or can be carried by different PUCCH and / or PUSCH in different time or frequency resources. Further, the two CSI reports may be two separate parts of the same CSI report, or two different CSI reports.
[0097] In one embodiment, the first set of CSI is transmitted on PUCCH and the second set of CSI is transmitted on PUSCH, for example, because the Block Error Rate (BLER) requirement for the PUCCH is lower than that of PUSCH.
[0098] In one embodiment, the first set of CSI supports repetition or retransmission, while the second set of CSI only supports transmission once. For example, if the first set of CSI is not decoded correctly, then base station 102 can request a retransmission from the UE 104.
[0099] In one embodiment, the first set of CSI applies modulation order that is lower than that for the second set of CSI, for example, because a lower modulation order corresponds to higher reliability normally.
[0100] In one embodiment, the first set of CSI applies lower coding rate than that for the second set of CSI, for example, because lower coding rate corresponds to higher reliability normally.
[0101] In one embodiment, the first set of CSI applies higher transmission power than that for the second set of CSI. For example, the target power configured by the base station 102 for the first set of CSI may be larger than that for the second set of CSI.
[0102] In one embodiment, two Channel Quality Indicators (CQIs) are included in the CSI reports. The first CQI is for the Q1 time instances and it is included in the first set of CSI. The second CQI is for the Q2 time instances and it is included in the second set of CSI. The first CQI is included in the first CSI report, and the second CQI is included in the second CSI report. The CQI can be wideband CQI or subband CQI. In one embodiment, the first CQI includes both wideband CQI and subband CQI, while the second CQI only includes wideband CQI.
[0103] In the first CSI report, the first CQI and the first CSI may be located adjacent to each other, and the first CQI is located at the front. In this case, the base station 102 understands this is the CQI associated with the CSI. Similar for the second CSI report, the second CQI and the second CSI may be located adjacent to each other, and the second CQI is located at the front.
[0104] As such, in accordance with various embodiments, the methods may include the first set of CSI having a higher priority than the second set of CSI. The methods may also include the wireless terminal device 104 transmitting, and the WANN 102 receiving, the first set of CSI and the second set of CSI on a same PUCCH or PUSCH transmission, or on different PUCCH and / or PUSCH transmissions in different time or frequency resources. In a more specific embodiment the methods may include the wireless terminal device 104 transmitting, and the WANN 102 receiving the first set of CSI on PUCCH, and the second set of CSI on PUSCH. The methods may also include the wireless terminal device 104 transmitting, and the WANN 102 receiving, the first set of CSI with repetition or retransmission, and the second set of CSI only once. In various examples, the first set of CSI applies a modulation order that is lower than a modulation order for the second set of CSI. In various examples, the first set of CSI applies a lower coding rate than a coding rate for the second set of CSI. In various examples, two CQIs are included in the CSI reports, wherein a first CQI is for the Q1 time instances and is included in the first set of CSI, and wherein a second CQI is for the Q2 time instances and is included in the second set of CSI. In various examples, the first CQI is included in the first CSI report, and the second CQI is included in the second CSI report. In various examples, the first CQI includes both wideband CQI and subband CQI, while the second CQI only includes wideband CQI.
[0105] Performance Monitoring
[0106] In various embodiments, the UE 104 performs separate performance monitoring for the first set of CSI and the second set of CSI. The base station 102 may indicate to the UE 104 to report the performance monitoring result of at least one of the following options:
[0107] -Performance monitoring result of the first set of CSI -In this case, the UE 104 may transmit the report of the performance monitoring results of the first set of CSI to the base station 102.
[0108] -Performance monitoring result of the second set of CSI -In this case, the UE 104 may transmit the report of the performance monitoring results of the first set of CSI to the base station 102.
[0109] -Performance monitoring result of both the first set of CSI and the second set of CSI -In this case, the UE 104 may transmit the report of the performance monitoring results of the first set of CSI and the second set of CSI to the base station 102.
[0110] -Performance monitoring result of the model -In this case, the UE 104 may transmit the report of the overall performance monitoring results of the model to the UE 104.
[0111] In one embodiment, one field is included in the command triggering the performance monitoring. The field indicates at least one of the above options to the UE 104. For example, if the field contains two bits, then “00” may indicate the UE 104 to report the performance monitoring results of the first set of CSI; “01” may indicate the UE 104 to report the performance monitoring results of the second set of CSI.
[0112] The performance monitoring results of the first set of CSI or the second set of CSI can be the system throughput, ground-truth CSI or the similarity metric, e.g., similarity between the channel metric input into the model at the UE 104 side and the derived channel metric at the base station 102 side. The similarity metric can be described as SGCS (squared generalized cosine similarity) .
[0113] In one embodiment, the base station 102 indicates to the UE 104 to report the ground-truth CSI for the first set of CSI report and / or the second set of CSI report. In other words, the base station 102 indicates the UE 104 to report the ground-truth CSI for the Q1 time instances and / or the Q1 time instances. The ground-truth CSI can be the information of the channel metrics or high-resolution CSI report.
[0114] In one embodiment, the base station 102 indicates to the UE 104 to report the similarity metric for the first set of CSI reports and / or the second set of CSI reports. In other words, the base station 102 indicates the UE 104 to report the similarity metric for the Q1 time instances and / or the Q1 time instances. The ground-truth CSI can be the information of the channel metric or high-resolution CSI report.
[0115] In one embodiment, the base station 102 indicates to the UE 104 to report the performance monitoring result of the model. Two parameters (i.e., r1 and r2) may be configured by the base station 102 to the UE 104, where r1 and r2 are larger than 0 and smaller than 1, and r1+r2=1. The performance monitoring result of the model can be a similarity metric of the model, and it may be calculated as r1·S1+r2·S2, where S1 and S2 are the similarity metric for the first set of CSI reports and the second set of CSI reports, respectively. In other words, the S1 and S2 are the similarity metric for the CSI for the Q1 time instances and the Q2 time instances.
[0116] A threshold can also be configured by the base station 102 to the UE 104. The UE 104 may only need to report the similarity metric if the similarity metric is above the threshold.
[0117] The base station 102 manages the model based on the reported contents of the performing monitoring. The management includes at least one of the following:
[0118] The base station 102 indicates to the UE 104 to suspend the first set of CSI or the second set of CSI.
[0119] The base station 102 indicates to the UE 104 to suspend the first set of CSI and the second set of CSI.
[0120] The base station 102 indicates to the UE 104 to resume the first set of CSI or the second set of CSI.
[0121] The base station 102 indicates to the UE 104 to resume the first set of CSI and the second set of CSI.
[0122] The base station 102 indicates to the UE 104 to activate the first set of CSI or the second set of CSI.
[0123] The base station 102 indicates to the UE 104 to activate the first set of CSI and the second set of CSI.
[0124] The base station 102 indicates to the UE 104 to deactivate the first set of CSI or the second set of CSI.
[0125] The base station 102 indicates to the UE 104 to deactivate the first set of CSI and the second set of CSI.
[0126] The base station 102 indicates to the UE 104 to update the first set of CSI or the second set of CSI.
[0127] The base station 102 indicates to the UE 104 to update the first set of CSI and the second set of CSI.
[0128] For example, the base station 102 indicates to the UE 104 to suspend the report of the first set of CSI and / or the second set of CSI, e.g., when the performance of the first set of CSI or the second set of CSI is not satisfied. The UE 104 may resume the report of suspended first set of CSI and / or the second set of CSI if the base station 102 indicates the UE 104 to resume the first set of CSI and / or the second set of CSI, respectively. Similarly, the base station 102 can indicate to the UE 104 to deactivate the first set of CSI and / or the second set of CSI.
[0129] As such, in accordance with various embodiments, the methods may include, the wireless terminal device 104 performing separate performance monitoring for the first set of CSI and the second set of CSI. The methods may also include the WANN 102 indicating, and the wireless terminal device 104 receiving an indication to report a performance monitoring result of at least one of the following options: a performance monitoring result of the first set of CSI; a performance monitoring result of the second set of CSI; a performance monitoring result of both the first set of CSI and the second set of CSI; and / or a performance monitoring result of a model. In various examples, the performance monitoring results of the first set of CSI or the second set of CSI can be a system throughput, a ground-truth CSI, or a similarity metric. The methods may include the WANN 102 indicating, and the wireless terminal device receiving an indication to report the ground-truth CSI for the first set of CSI report and / or the second set of CSI report. The methods may include the WANN 102 indicating, and the wireless terminal device receiving an indication to report a similarity metric for the first set of CSI report and / or the second set of CSI report. The methods may include the WANN 102 indicating, and the wireless terminal device receiving an indication to report the performance monitoring result of the model, and configuring two parameters (r1 and r2) , wherein r1 and r2 are larger than 0 and smaller than 1, and wherein r1+r2=1. In various examples, the performance monitoring result of the model can be a similarity metric of a model that is calculated as r1·S1+r2·S2, where S1 and S2 are the similarity metrics for the first set of CSI report and the second set of CSI report, respectively.
[0130] The methods may include the WANN 102 managing the model, and the wireless terminal device 104 receiving management of the model, based on reported contents of the performing monitoring, wherein the management includes at least one of the following:
[0131] the WANN 102 indicating to the wireless terminal device 104 to suspend the first set of CSI or the second set of CSI;
[0132] the WANN 102 indicating to the wireless terminal device 104 to suspend the first set of CSI and the second set of CSI;
[0133] the WANN 102 indicating to the wireless terminal device 104 to resume the first set of CSI or the second set of CSI;
[0134] the WANN 102 indicating to the wireless terminal device 104 to resume the first set of CSI and the second set of CSI;
[0135] the WANN 102 indicating to the wireless terminal device 104 to activate the first set of CSI or the second set of CSI;
[0136] the WANN 102 indicating to the wireless terminal device 104 to activate the first set of CSI and the second set of CSI;
[0137] the WANN 102 indicating to the wireless terminal device 104 to deactivate the first set of CSI or the second set of CSI;
[0138] the WANN 102 indicating to the wireless terminal device 104 to deactivate the first set of CSI and the second set of CSI;
[0139] the WANN 102 indicating to the wireless terminal device 104 to update the first set of CSI or the second set of CSI; and / or
[0140] the WANN 102 indicating to the wireless terminal device 104 to update the first set of CSI and the second set of CSI.
[0141] Multiple Reports
[0142] It is to be understood that the following mechanism for multiple reports can be applied to or used with the above described embodiments, or may stand along as a separate independent embodiments.
[0143] In various embodiments, the base station 102 sends one command to the UE 104 to trigger M CSI-RS resource reception, and to trigger P CSI reports, where the P CSI reports include CSI for K time instances. M, P, and K are integer numbers, where M is larger than 1, P is larger than 0, K is larger than 0, and P is not larger than K. The P CSI reports can be transmitted in different time resources and / or different frequency resources, e.g., the P CSI reports are transmitted in different slots. The command can be Downlink Control Information (DCI) or Medium Access Control Control Element (MAC-CE) .
[0144] The CSI is channel status information, which can include Precoding Matrix Indicator (PMI) information, Channel quality indicator (CQI) information, Reference Signals Received Power (RSRP) information, etc. The channel status information can be absolute values, relative values, or compressed values.
[0145] In various embodiments, the M CSI-RS resources are used for the UE 104 to predict the CSI info for the future K time instances. For example, the base station 102 may send one command to trigger 4 CSI-RS resources for the UE 104 to predict CSI info for time instances T1 and T2, and trigger the UE 104 to report the CSI info in one CSI report. In this example, M is equal to 4, K is equal to 2, and P is equal to 1.
[0146] The base station 102 may indicate the timing info for the M CSI-RS resources. In one embodiment, the base station 102 indicates the starting time of the first CSI-RS resource and the time offset between the CSI-RS resources to the UE 104. If the CSI-RS resources are repeated multiple times, then the time offset between each repetition can be indicated to the UE 104 as well.
[0147] The base station 102 may indicate the timing info for the P CSI reports. In one embodiment, the base station 102 indicates the starting time of the first CSI report and the time offset between the CSI reports. Particularly, the CSI reports are transmitted in consecutive slots. The base station 102 may indicate the number of CSI reports via Radio Resource Control (RRC) configuration or via this command.
[0148] In on embodiment, the base station 102 may indicate one index to the UE 104, where each index corresponds to the timing info for the M CSI-RS resources and the timing info for the P CSI reports.
[0149] The CSI for K time instances may be mapped to P CSI reports with one of the following rules.
[0150] Alt. 1: In case P is larger than 1, only one CSI with the highest priority is included in the first CSI report. The CSI for the remaining K-1 time instances are mapped to the remaining P-1 CSI reports with one of the following alternatives.
[0151] Alt. 1-1: CSI for a first number X time instances with higher priority is included in the second CSI report. CSI for a second number of Y time instances is included in each of the CSI report other than the first CSI report and second CSI report, where X and Y are integer numbers larger than 0, and X is not larger than Y.
[0152] In one embodiment, CSI for (K-1) mod (P-1) time instances with higher priority is includes in the second CSI report, if (K-1) mod (P-1) is larger than 0. For the remaining CSI reports, if any, each of them includes CSI for time instances. The CSI with higher priority is mapped in the earlier CSI report.
[0153] Alt. 1-2: CSI for a first number X time instances with higher priority are included in the last CSI report. CSI for a second number of Y time instances is included in each of the CSI reports other than the first CSI report and the last CSI report, where X and Y are integer numbers larger than 0, and X is not larger than Y.
[0154] In one embodiment, each of the CSI reports include CSI for time instances, except for the last CSI report, where the last CSI report includes CSI for (K-1) mod (P-1) time instances if (K-1) mod (P-1) is larger than 0. The CSI with higher priority is mapped in the earlier CSI report.
[0155] Alt. 2: CSI for K mod P time instances with a higher priority are includes in the first CSI report, if K mod P is larger than 0. For the remaining CSI reports, if any, each of them includes CSI for time instances. The CSI with a higher priority is mapped in the earlier CSI report.
[0156] Alt. 3: Each of the CSI reports include CSI for time instances, except for the last CSI report, where the last CSI report includes CSI for K mod P time instances if K mod P is larger than 0. The CSI with higher priority is mapped in the earlier CSI report.
[0157] The priority of the P CSI reports is determined by one of the following alternatives.
[0158] Alt. 1: The CSI for the earlier time instance has a higher priority than the CSI for the later time instance.
[0159] Alt. 2: The CSI for the time instance with higher quality has a higher priority than CSI for the time instance with lower quality. The quality can be accuracy probability.
[0160] Alt. 3: The CSI for the time instance with higher channel quality has a higher priority than CSI for the time instance with lower channel quality. The channel quality can be CQI, RSRP or SINR, etc.
[0161] In the above embodiments, the “mod” operation above refers to modular operation. refers to round down operation.
[0162] FIG. 6 shows an example communication diagram of communications between the base station 102 and the UE 104 in accordance with various examples. In the example, shown in FIG. 6, the base station 102 transmits a command to the UE 104 at slot 0. This command triggers the UE 104 to receive the CSI-RS resources transmitted at slot 1, slot 2, slot 3, and slot 4, and triggers the UE 104 to report the CSI at slot 5 and slot 6. Based on these CSI-RS, the UE 104 derives the CSI for slot 4, slot 5, slot 6, and slot 7. The CSI for slot 4 is included in the first set of CSI. The CSI for slot 5, slot 6, and slot 7 are included in the second set of CSI. The first set of CSI is reported in the first CSI report at slot 5, and the second set of CSI is reported in the second CSI report at slot 6.
[0163] As such, in accordance with various embodiments, the methods may include the WANN 102 transmitting, and the wireless terminal device 104 receiving, a command to trigger M CSI-RS resource reception, and to trigger P CSI reports, wherein the P CSI reports include CSI for K time instances, wherein M, P, and K are integer number, where M is larger than 1, P is larger than 0, K is larger than 0, and P is not larger than K, wherein the P CSI reports are transmitted in different time resources and / or different frequency resources. In various examples, the P CSI reports may be transmitted in different slots. In various examples, the command can be DCI or MAC-CE.
[0164] In various examples of the methods, the CSI for the K time instances are mapped to the P CSI reports with the following rule: when P is larger than 1, only one CSI with a highest priority is included in a first CSI report, and wherein CSI for the remaining K-1 time instances are mapped to the remaining P-1 CSI reports with one of the following alternatives:
[0165] CSI for a first number X time instances with higher priority is included in a second CSI report, wherein CSI for a second number Y time instances is included in each of the CSI report other than the first CSI report and the second CSI report, where X and Y are integer number larger than 0, and X is not larger than Y; or
[0166] CSI for the first number X time instances with higher priority is included in a last CSI report, wherein CSI for the second number of Y time instances is included in each of the CSI report other than the first CSI report and the last CSI report, where X and Y are integer number larger than 0, and X is not larger than Y.
[0167] In other examples of the methods, the CSI for the K time instances are mapped to the P CSI reports with the following rule: CSI for K mod P time instances with higher priority are included in a first CSI report, in response to K mod P being larger than 0, wherein each of any remaining CSI reports includes CSI for time instances, wherein CSI with higher priority is mapped in earlier CSI report.
[0168] In other examples of the methods, the CSI for the K time instances are mapped to the P CSI reports with the following rule: each CSI report includes CSI for time instances, except for a last CSI report, wherein the last CSI report includes CSI for K mod P time instances in response to K mod P being larger than 0, wherein CSI with higher priority are mapped in an earlier CSI report.
[0169] In various examples, of the methods, a priority of the P CSI reports is determined by one of the following alternatives:
[0170] a CSI for an earlier time instance has a higher priority than a CSI for a later time instance;
[0171] a CSI for a time instance with a higher quality has a higher priority than a CSI for a time instance with lower quality, wherein the quality can be an accuracy probability; or
[0172] a CSI for a time instance with a higher channel quality has a higher priority than a CSI for a time instance with a lower channel quality, wherein the channel quality can be Channel Quality Indicator (CQI) , Reference Signals Received Power (RSRP) , or Signal to Interference & Noise Ratio (SINR) .
[0173] The description and accompanying drawings above provide specific example embodiments and implementations. The described subject matter may, however, be embodied in a variety of different forms and, therefore, covered or claimed subject matter is intended to be construed as not being limited to any example embodiments set forth herein. A reasonably broad scope for claimed or covered subject matter is intended. Among other things, for example, subject matter may be embodied as methods, devices, components, systems, or non-transitory computer-readable media for storing computer codes. Accordingly, embodiments may, for example, take the form of hardware, software, firmware, storage media or any combination thereof. For example, the method embodiments described above may be implemented by components, devices, or systems including memory and processors by executing computer codes stored in the memory.
[0174] Throughout the specification and claims, terms may have nuanced meanings suggested or implied in context beyond an explicitly stated meaning. Likewise, the phrase “in one embodiment / implementation / example / approach” as used herein does not necessarily refer to the same embodiment and the phrase “in another embodiment / implementation / example / approach” as used herein does not necessarily refer to a different embodiment. It is intended, for example, that claimed subject matter includes combinations of example embodiments in whole or in part.
[0175] In general, terminology may be understood at least in part from usage in context. For example, terms, such as “and” , “or” , or “and / or, ” as used herein may include a variety of meanings that may depend at least in part on the context in which such terms are used. Typically, “or” if used to associate a list, such as A, B or C, is intended to mean A, B, and C, here used in the inclusive sense, as well as A, B or C, here used in the exclusive sense. In addition, the term “one or more” as used herein, depending at least in part upon context, may be used to describe any feature, structure, or characteristic in a singular sense or may be used to describe combinations of features, structures or characteristics in a plural sense. Similarly, terms, such as “a, ” “an, ” or “the, ” may be understood to convey a singular usage or to convey a plural usage, depending at least in part upon context. In addition, the term “based on” may be understood as not necessarily intended to convey an exclusive set of factors and may, instead, allow for existence of additional factors not necessarily expressly described, again, depending at least in part on context.
[0176] Reference throughout this specification to features, advantages, or similar language does not imply that all of the features and advantages that may be realized with the present solution should be or are included in any single implementation thereof. Rather, language referring to the features and advantages is understood to mean that a specific feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment of the present solution. Thus, discussions of the features and advantages, and similar language, throughout the specification may, but do not necessarily, refer to the same embodiment.
[0177] Furthermore, the described features, advantages and characteristics of the present solution may be combined in any suitable manner in one or more embodiments. One of ordinary skill in the relevant art will recognize, in light of the description herein, that the present solution can be practiced without one or more of the specific features or advantages of a particular embodiment. In other instances, additional features and advantages may be recognized in certain embodiments that may not be present in all embodiments of the present solution.
Claims
1.A method performed by a wireless access network node comprising:transmitting, to a wireless terminal device, a Channel Status Information Reference Signal (CSI-RS) ; andreceiving, from the wireless terminal device, two sets of Channel Status Information (CSI) reports,wherein a first set of CSI is included in the first set of CSI reports, and a second set of CSI is included in the second set of CSI reports, andwherein the first set of CSI includes CSI for Q1 time instances, and the second set of CSI includes CSI for Q2 time instances, wherein Q1 and Q2 are integer numbers larger than 0, and wherein Q1 is not larger than Q2, and wherein the Q1 time instances are earlier than the Q2 time instances.2.The method according to claim 1, whereinQ1 is equal to 1, and Q2 is larger than 1.3.The method according to any of claims 1 to 2, whereinthe Q1 time instances are no later than a time point T, and the Q2 time instances are after the time point T.4.The method according to any of claims 1 to 3, whereinthe wireless terminal device derives the first set of CSI based on channel metrics for the Q1 time instances, and derives the second set of the CSI based on channel metric for the Q1 time instances and channel metrics for Q3 time instances, where Q3 is an integer number larger than 0, and wherein the Q3 time instances are earlier than the Q1 time instances.5.The method according to any of claims 1 to 4, comprising:transmitting, to the wireless terminal device, the CSI-RS at the Q1 time instances and the Q3 time instances,wherein the wireless terminal device derives the channel metrics for the Q1 time instances and the Q3 time instances.6.The method according to any of claims 3 to 5, wherein the time point T is determined as one of the following alternatives:a slot of CSI reference resource corresponding to the CSI reports;a last slot or symbol containing a last CSI-RS corresponding to the CSI reports;a last slot or symbol containing the CSI reports; ora last slot or symbol containing a command from base station triggering the CSI-RS or the CSI reports.7.The method according to any of claims 1 to 6, comprising:deriving the channel metrics for the Q1 time instances based on the first set of CSI.8.The method according to any of claims 1 to 7, comprising:deriving the channel metrics for the Q2 time instances based both the first set of CSI and the second set of CSI.9.The method according to any of claims 1 to 8, whereinthe Q1 time instances are time instances for a last CSI-RS resource corresponding to the CSI reports.10.The method according to any of claims 1 to 9, whereinthe first set of CSI has a higher priority than the second set of CSI.11.The method according to any of claims 1 to 10, comprising:receiving, from the wireless terminal device, the first set of CSI and the second set of CSI on a same Physical Uplink Control Channel (PUCCH) or Physical Uplink Shared Channel (PUSCH) transmission, or on different PUCCH and / or PUSCH transmissions in different time or frequency resources.12.The method according to any of claims 1 to 11, comprising:receiving, from the wireless terminal device, the first set of CSI on PUCCH; andreceiving, from the wireless terminal device, the second set of CSI on PUSCH.13.The method according to any of claims 1 to 12, comprising:receiving, from the wireless terminal device, the first set of CSI with repetition or retransmission; andreceiving, from the wireless terminal device, the second set of CSI only once.14.The method according to any of claims 1 to 13, whereinthe first set of CSI applies a modulation order that is lower than a modulation order for the second set of CSI.15.The method according to any of claims 1 to 14, whereinthe first set of CSI applies a lower coding rate than a coding rate for the second set of CSI.16.The method according to any of claims 1 to 15, whereintwo Channel Quality Indicators (CQIs) are included in the CSI reports, wherein a first CQI is for the Q1 time instances and is included in the first set of CSI, and wherein a second CQI is for the Q2 time instances and is included in the second set of CSI.17.The method according to claim 16, whereinthe first CQI is included in the first CSI report, and the second CQI is included in the second CSI report.18.The method according to any of claims 16 to 17, whereinthe first CQI includes both wideband CQI and subband CQI, while the second CQI only includes wideband CQI.19.The method according to any of claims 1 to 18, whereinthe wireless terminal device performs separate performance monitoring for the first set of CSI and the second set of CSI.20.The method according to any of claims 1 to 19, comprising:indicating, to the wireless terminal device, to report a performance monitoring result of at least one of the following options:a performance monitoring result of the first set of CSI;a performance monitoring result of the second set of CSI;a performance monitoring result of both the first set of CSI and the second set of CSI; and / ora performance monitoring result of a model.21.The method according to any of claims 19 to 20, whereinthe performance monitoring results of the first set of CSI or the second set of CSI can be a system throughput, a ground-truth CSI, or a similarity metric.22.The method according to any of claims 19 to 21, comprising:indicating, to the wireless terminal device, to report the ground-truth CSI for the first set of CSI report and / or the second set of CSI report.23.The method according to any of claims 19 to 21, comprising:indicating, to the wireless terminal device, to report a similarity metric for the first set of CSI report and / or the second set of CSI report.24.The method according to any of claims 19 to 21, comprising:indicating, to the wireless terminal device, to report the performance monitoring result of the model; andconfiguring, to the wireless terminal device, two parameters (r1 and r2) , wherein r1 and r2 are larger than 0 and smaller than 1, and wherein r1+r2=1.25.The method according to claim 24, whereinthe performance monitoring result of the model can be a similarity metric of a model that is calculated as r1·S1+r2·S2, where S1 and S2 are the similarity metrics for the first set of CSI report and the second set of CSI report, respectively.26.The method according to any of claims 20 to 25, comprising:managing the model based on reported contents of the performing monitoring, wherein the management includes at least one of the following:indicating to the wireless terminal device to suspend the first set of CSI or the second set of CSI;indicating to the wireless terminal device to suspend the first set of CSI and the second set of CSI;indicating to the wireless terminal device to resume the first set of CSI or the second set of CSI;indicating to the wireless terminal device to resume the first set of CSI and the second set of CSI;indicating to the wireless terminal device to activate the first set of CSI or the second set of CSI;indicating to the wireless terminal device to activate the first set of CSI and the second set of CSI;indicating to the wireless terminal device to deactivate the first set of CSI or the second set of CSI;indicating to the wireless terminal device to deactivate the first set of CSI and the second set of CSI;indicating to the wireless terminal device to update the first set of CSI or the second set of CSI; and / orindicating to the wireless terminal device to update the first set of CSI and the second set of CSI.27.A method performed by a wireless access network node comprising:transmitting, to a wireless terminal device, a command to trigger M Channel Status Information Reference Signal (CSI-RS) resource reception, and to trigger P Channel Status Information (CSI) reports,wherein the P CSI reports include CSI for K time instances,wherein M, P, and K are integer number, where M is larger than 1, P is larger than 0, K is larger than 0, and P is not larger than K,wherein the P CSI reports are transmitted in different time resources and / or different frequency resources.28.The method according to claim 27, whereinthe P CSI reports are transmitted in different slots.29.The method according to any of claims 27 to 28, whereinthe command can be Downlink Control Information (DCI) or Medium Access Control Control Element (MAC-CE) .30.The method according to any of claims 27 to 29, whereinthe CSI for the K time instances are mapped to the P CSI reports with the following rule:when P is larger than 1, only one CSI with a highest priority is included in a first CSI report, and wherein CSI for the remaining K-1 time instances are mapped to the remaining P-1 CSI reports with one of the following alternatives:CSI for a first number X time instances with higher priority is included in a second CSI report, wherein CSI for a second number Y time instances is included in each of the CSI report other than the first CSI report and the second CSI report, where X and Y are integer number larger than 0, and X is not larger than Y; orCSI for the first number X time instances with higher priority is included in a last CSI report, wherein CSI for the second number of Y time instances is included in each of the CSI report other than the first CSI report and the last CSI report, where X and Y are integer number larger than 0, and X is not larger than Y.31.The method according to any of claims 27 to 30, whereinthe CSI for the K time instances are mapped to the P CSI reports with the following rule:CSI for K mod P time instances with higher priority are included in a first CSI report, in response to K mod P being larger than 0, wherein each of any remaining CSI reports includes CSI for time instances, wherein CSI with higher priority is mapped in earlier CSI report.32.The method according to any of claims 27 to 31, whereinthe CSI for the K time instances are mapped to the P CSI reports with the following rule:each CSI report includes CSI fortime instances, except for a last CSI report, wherein the last CSI report includes CSI for K mod P time instances in response to K mod P being larger than 0, wherein CSI with higher priority are mapped in an earlier CSI report.33.The method according to any of claims 27 to 32, whereina priority of the P CSI reports is determined by one of the following alternatives:a CSI for an earlier time instance has a higher priority than a CSI for a later time instance;a CSI for a time instance with a higher quality has a higher priority than a CSI for a time instance with lower quality, wherein the quality can be an accuracy probability; ora CSI for a time instance with a higher channel quality has a higher priority than a CSI for a time instance with a lower channel quality, wherein the channel quality can be Channel Quality Indicator (CQI) , Reference Signals Received Power (RSRP) , or Signal to Interference &Noise Ratio (SINR) .34.A method performed by a wireless terminal device comprising:receiving, from a wireless access network node, a Channel Status Information Reference Signal (CSI-RS) ; andtransmitting, to the wireless access network node, two sets of Channel Status Information (CSI) reports,wherein a first set of CSI is included in the first set of CSI reports, and a second set of CSI is included in the second set of CSI reports, andwherein the first set of CSI includes CSI for Q1 time instances, and the second set of CSI includes CSI for Q2 time instances, wherein Q1 and Q2 are integer numbers larger than 0, and wherein Q1 is not larger than Q2, and wherein the Q1 time instances are earlier than the Q2 time instances.35.The method according to claim 34, whereinQ1 is equal to 1, and Q2 is larger than 1.36.The method according to any of claims 34 to 35, whereinthe Q1 time instances are no later than a time point T, and the Q2 time instances are after the time point T.37.The method according to any of claims 34 to 36, comprising:deriving the first set of CSI based on channel metrics for the Q1 time instances, and deriving the second set of the CSI based on the channel metrics for the Q1 time instances and channel metrics for Q3 time instances, where Q3 is an integer number larger than 0, and wherein the Q3 time instances are earlier than the Q1 time instances.38.The method according to any of claims 34 to 37, comprising:receiving, from the wireless access network node, the CSI-RS at the Q1 time instances and the Q3 time instances; andderiving the channel metrics for the Q1 time instances and the Q3 time instances.39.The method according to any of claims 36 to 38, wherein the time point T is determined as one of the following alternatives:a slot of CSI reference resource corresponding to the CSI reports;a last slot or symbol containing a last CSI-RS corresponding to the CSI reports;a last slot or symbol containing the CSI reports; ora last slot or symbol containing a command from base station triggering the CSI-RS or the CSI reports.40.The method according to any of claims 34 to 39, whereinthe wireless access network node derives the channel metrics for the Q1 time instances based on the first set of CSI.41.The method according to any of claims 34 to 40, whereinthe wireless access network node derives the channel metrics for the Q2 time instances based both the first set of CSI and the second set of CSI.42.The method according to any of claims 34 to 41, whereinthe Q1 time instances are time instances for a last CSI-RS resource corresponding to the CSI reports.43.The method according to any of claims 34 to 42, whereinthe first set of CSI has a higher priority than the second set of CSI.44.The method according to any of claims 34 to 43, comprising:transmitting, to the wireless access network node, the first set of CSI and the second set of CSI on a same Physical Uplink Control Channel (PUCCH) or Physical Uplink Shared Channel (PUSCH) transmission, or on different PUCCH and / or PUSCH transmissions in different time or frequency resources.45.The method according to any of claims 34 to 44, comprising:transmitting, to the wireless access network node, the first set of CSI on PUCCH; andtransmitting, to the wireless access network node, the second set of CSI on PUSCH.46.The method according to any of claims 34 to 45, comprising:transmitting, to the wireless access network node, the first set of CSI with repetition or retransmission; andtransmitting, to the wireless access network node, the second set of CSI only once.47.The method according to any of claims 34 to 46, whereinthe first set of CSI applies a modulation order that is lower than a modulation order for the second set of CSI.48.The method according to any of claims 34 to 47, whereinthe first set of CSI applies a lower coding rate than a coding rate for the second set of CSI.49.The method according to any of claims 34 to 48, whereintwo Channel Quality Indicators (CQIs) are included in the CSI reports, wherein a first CQI is for the Q1 time instances and is included in the first set of CSI, and wherein a second CQI is for the Q2 time instances and is included in the second set of CSI.50.The method according to claim 49, whereinthe first CQI is included in the first CSI report, and the second CQI is included in the second CSI report.51.The method according to claim 49, whereinthe first CQI includes both wideband CQI and subband CQI, while the second CQI only includes wideband CQI.52.The method according to any of claims 34 to 51, comprising:performing separate performance monitoring for the first set of CSI and the second set of CSI.53.The method according to any of claims 34 to 52, comprising:receiving, from the wireless access network node, an indication to report a performance monitoring result of at least one of the following options:a performance monitoring result of the first set of CSI;a performance monitoring result of the second set of CSI;a performance monitoring result of both the first set of CSI and the second set of CSI; and / ora performance monitoring result of a model.54.The method according to any of claims 52 to 53, whereinthe performance monitoring results of the first set of CSI or the second set of CSI can be a system throughput, a ground-truth CSI, or a similarity metric.55.The method according to any of claims 52 to 53, comprising:receiving, from the wireless access network node, an indication to report the ground-truth CSI for the first set of CSI report and / or the second set of CSI report.56.The method according to any of claims 52 to 53, comprising:receiving, from the wireless access network node, an indication to report a similarity metric for the first set of CSI report and / or the second set of CSI report.57.The method according to any of claims 52 to 53, comprising:indicating, from the wireless access network node, an indication to report the performance monitoring result of the model; andreceiving, from the wireless access network node, a configuration of two parameters (r1 and r2) , wherein r1 and r2 are larger than 0 and smaller than 1, and wherein r1+r2=1.58.The method according to claim 57, whereinthe performance monitoring result of the model can be a similarity metric of a model that is calculated as r1·S1+r2·S2, where S1 and S2 are the similarity metrics for the first set of CSI report and the second set of CSI report, respectively.59.The method according to any of claims 53 to 58, comprising:receiving, from the wireless access network node, management of the model based on reported contents of the performing monitoring, wherein the management includes at least one of the following:receiving, from the wireless access network node, an indication to suspend the first set of CSI or the second set of CSI;receiving, from the wireless access network node, an indication to suspend the first set of CSI and the second set of CSI;receiving, from the wireless access network node, an indication to resume the first set of CSI or the second set of CSI;receiving, from the wireless access network node, an indication to resume the first set of CSI and the second set of CSI;receiving, from the wireless access network node, an indication to activate the first set of CSI or the second set of CSI;v to activate the first set of CSI and the second set of CSI;indicating to the wireless terminal device to deactivate the first set of CSI or the second set of CSI;receiving, from the wireless access network node, an indication to deactivate the first set of CSI and the second set of CSI;receiving, from the wireless access network node, an indication to update the first set of CSI or the second set of CSI; and / orreceiving, from the wireless access network node, an indication to update the first set of CSI and the second set of CSI.60.A method performed by a wireless terminal device comprising:receiving, from a wireless access network node, a command to trigger M Channel Status Information Reference Signal (CSI-RS) resource reception, and to trigger P Channel Status Information (CSI) reports,wherein the P CSI reports include CSI for K time instances,wherein M, P, and K are integer number, where M is larger than 1, P is larger than 0, K is larger than 0, and P is not larger than K,wherein the P CSI reports are transmitted in different time resources and / or different frequency resources.61.The method according to claim 60, whereinthe P CSI reports are transmitted in different slots.62.The method according to any of claims 60 to 61, whereinthe command can be Downlink Control Information (DCI) or Medium Access Control Control Element (MAC-CE) .63.The method according to any of claims 60 to 62, whereinthe CSI for the K time instances are mapped to the P CSI reports with the following rule:when P is larger than 1, only one CSI with a highest priority is included in a first CSI report, and wherein CSI for the remaining K-1 time instances are mapped to the remaining P-1 CSI reports with one of the following alternatives:CSI for a first number X time instances with higher priority is included in a second CSI report, wherein CSI for a second number Y time instances is included in each of the CSI report other than the first CSI report and the second CSI report, where X and Y are integer number larger than 0, and X is not larger than Y; orCSI for the first number X time instances with higher priority is included in a last CSI report, wherein CSI for the second number of Y time instances is included in each of the CSI report other than the first CSI report and the last CSI report, where X and Y are integer number larger than 0, and X is not larger than Y.64.The method according to any of claims 60 to 63, whereinthe CSI for the K time instances are mapped to the P CSI reports with the following rule:CSI for K mod P time instances with higher priority are included in a first CSI report, in response to K mod P being larger than 0, wherein each of any remaining CSI reports includes CSI for time instances, wherein CSI with higher priority is mapped in earlier CSI report.65.The method according to any of claims 60 to 64, whereinthe CSI for the K time instances are mapped to the P CSI reports with the following rule:each CSI report includes CSI fortime instances, except for a last CSI report, wherein the last CSI report includes CSI for K mod P time instances in response to K mod P being larger than 0, wherein CSI with higher priority are mapped in an earlier CSI report.66.The method according to any of claims 60 to 65, whereina priority of the P CSI reports is determined by one of the following alternatives:a CSI for an earlier time instance has a higher priority than a CSI for a later time instance;a CSI for a time instance with a higher quality has a higher priority than a CSI for a time instance with lower quality, wherein the quality can be an accuracy probability; ora CSI for a time instance with a higher channel quality has a higher priority than a CSI for a time instance with a lower channel quality, wherein the channel quality can be Channel Quality Indicator (CQI) , Reference Signals Received Power (RSRP) , or Signal to Interference &Noise Ratio (SINR) .67.An apparatus for wireless communication comprising a processor that is configured to carry out the method of any of claims 1 to 66.68.A non-transitory computer readable medium having code stored thereon, the code when executed by a processor, causing the processor to implement the method recited in any of claims 1 to 66.
Citation Information
Patent Citations
Method for transmitting and receiving channel state information-reference signal (CSI-RS) and apparatus therefor
CN110959268A
Method of panel specific reporting for DL and UL transmissions
CN114223143A
Method and device for transmitting or receiving port group-based channel state information in wireless communication system
WO2023146246A1