WO2025156455A1

WO2025156455A1 - Applicable condition of model

Info

Publication number: WO2025156455A1
Application number: PCT/CN2024/087595
Authority: WO
Inventors: Xingguang WEI; Zhaohua Lu; Wenfeng Liu; Xianming Chen
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2024-04-12
Filing date: 2024-04-12
Publication date: 2025-07-31
Anticipated expiration: 2026-10-12

Abstract

A method includes a base station indicating, and a UE receiving an indication of applicable condition information of a model and/or update information of the applicable condition in a resource unit to the wireless terminal device. The UE then may determine the applicable condition of the model based on the indication.

Description

APPLICABLE CONDITION OF MODEL

TECHNICAL FIELD

This disclosure generally relates to handling transmissions in a wireless cellular access network and is specifically directed to mechanisms for establishing and/or communicating applicable conditions for models, for example, between a base station and a User Equipment (UE) .

BACKGROUND

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.

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

This disclosure generally relates to handling transmissions in a wireless cellular access network and is specifically directed to mechanisms for establishing and/or communicating applicable conditions for models between a base station (e.g., wireless access network node (WANN) ) and a use equipment (UE) (e.g., wireless terminal device) .

Different models may be associated with different applicable conditions (also called “additional conditions” ) . For example, a model trained in one cell may only be applicable to that same cell. If the model is applied in another cell, the model performance may be degraded. In this document, we present methods and procedures for the UE to be made aware of the applicable conditions for models for different resource units, that is, different carriers, cells, a bands, bandwidth parts (BWP) , or Transmission and Reception Point (TRP) .

In some exemplary implementations, a method performed by the WANN (e.g., base station) includes indicating, to a wireless terminal device (e.g., UE) , applicable condition information of a model and/or update information of the applicable condition in a resource unit to the wireless terminal device. Similarly, a method performed by the wireless terminal device includes receiving, from the WANN, an indication of applicable condition information of a model and/or update information of the applicable condition in a resource unit to the wireless terminal device, and determining the applicable condition of the model based on the indication.

In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the methods may include the WANN indicating, and the wireless terminal device receiving an indication of the applicable condition information periodically, and a period and/or an offset of the indication of the applicable condition information, wherein the wireless terminal device determines a time to receive the applicable condition information based on the indicated period and/or offset. The methods may also include the WANN indicating, and the wireless terminal device receiving an indication of the applicable condition information and the update information of the applicable condition periodically, and a period and/or an offset of the indication of the update information of the applicable condition. The methods may also include the wireless terminal device determining a time to receive the update information based on the indicated period and/or offset, and determining whether the applicable condition is updated based on the update information. The methods may also include the wireless terminal device receiving, from the WANN, updated applicable condition information in response to receiving the indication of update information of the applicable condition. In various embodiments, a period of indication of the update information is larger than a period of an indication of the applicable condition information.

In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the methods may include the WANN indicating, and the wireless terminal device receiving an indication of a mapping between each bit of one or more bits of the indication of update information to: a corresponding use case; a corresponding group of use cases, wherein each group of use cases includes one or more use cases; a corresponding applicable condition; or a corresponding group of applicable conditions, wherein each group of applicable conditions includes one or more applicable conditions. The methods may also include the wireless terminal device determining whether the application condition is updated based on at least one corresponding bit. The methods may include the WANN indicating, and the wireless terminal device receiving an indication of the update information of the applicable condition via Downlink Control Information (DCI) , system information, or paging information.

In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the indication of update information includes at least a first bit, and methods may also include the WANN indicating to the wireless terminal device that the applicable condition is the same as a previous indication by transmitting a value of the first bit that is a same as a previous value of the first bit, or that the applicable condition is updated by transmitting a value of the first bit that is a different value from the previous value of the first bit. Similarly, the methods may include the wireless terminal device receiving, from the WANN, a value of the first bit that is a same as a previous value of the first bit, and responsively determining that the applicable condition is the same as a previous indication; or receiving, from the WANN, a value of the first bit that is a different value from the previous value of the first bit, and responsively determining that the applicable condition is updated. Similarly, the methods may include the WANN indicating to the wireless terminal device that the applicable condition is updated by transmitting a first value of the first bit, or indicating that the applicable condition is the same as a previous indication by transmitting a second value of the first bit that is an opposite value as the first value. Similarly still, the methods may include the wireless terminal device receiving, from the WANN, a first value of the first bit, and responsively determining that the applicable condition is updated; or a second value of the first bit that is an opposite value as the first value, and responsively determining that the applicable condition is the same as a previous indication.

In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the methods may include the WANN indicating, and the wireless terminal device receiving an indication of a mapping between each bit of one or more bits of the applicable condition information to: a corresponding use case; a corresponding group of use cases; or a corresponding applicable condition; and a mapping between bit values of the one or more bits of the applicable condition information and a corresponding state of the applicable condition. The methods may include the wireless terminal device determining a state of the applicable condition based on the corresponding one or more bits.

In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the methods may also include the WANN indicating, and the wireless terminal device receiving an indication of a mapping between each applicable condition and a RACH resource. The wireless terminal device may transmit, and the WANN may receive the RACH resource. Then, the methods may include the WANN indicating, and the wireless terminal device receiving an indication of information of the applicable condition corresponding to the RACH resource received from the wireless terminal device.

In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the methods may also include the WANN indicating, and the wireless terminal device receiving an indication of a mapping between each group of applicable conditions and a RACH resource. The wireless terminal device may transmit, and the WANN may receive the RACH resource. Then, the methods may include the WANN indicating, and the wireless terminal device receiving an indication of information of the group of applicable conditions corresponding to the RACH resource received from the wireless terminal device.

In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the methods may also include the WANN indicating, and the wireless terminal device receiving an indication of a mapping between each applicable condition of each use case and a RACH resource. The wireless terminal device may transmit, and the WANN may receive the RACH resource. Then, the methods may include the WANN indicating, and the wireless terminal device receiving an indication of information of the applicable condition of each use case corresponding to the RACH resource received from the wireless terminal device.

In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the methods may also include the WANN indicating, and the wireless terminal device receiving an indication of an indication period of each applicable condition, and a mapping between each period of each applicable condition and a RACH resource. The wireless terminal device may transmit, and the WANN may receive the RACH resource. Then, the methods may include the WANN indicating, and the wireless terminal device receiving an indication of information of the applicable condition that has a same indication period as the requested period.

In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the methods may also include the wireless terminal device transmitting the RACH resource as a RACH preamble or signaling carried in a message sent to the WANN.

In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the methods may include the WANN indicating, and the wireless terminal device receiving an indication of a valid area of the indication of applicable condition information and/or the update information. In various embodiments, the valid area comprises at least one of the following: a list of resource units indicated by the wireless access network node; all neighboring cells of the resource unit; all neighboring cells with a same frequency of the resource unit; all neighboring cells in a same band of the resource unit; all neighboring cells in a same frequency range of the resource unit; all serving cells in a same band of the resource unit; all serving cells in a same frequency range of the resource unit; and/or a list of regions indicated by the base station, wherein the regions are at least one of system information area, tracking area, paging area, or broadcast/multicast area.

In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the methods may also include the wireless terminal device determining the applicable condition information and/or the update information based on the valid area, wherein a same indication of applicable condition information and/or update information is applied in the valid area, and/or wherein the indication of applicable condition information and/or the update information is comparable in the valid area. In various embodiments, a same applicable condition information indication or update information indication in the valid area refers to a same applicable condition or update information, respectively, and/or a different applicable condition information indication or update information indication in the valid area refers to a different applicable condition or update information, respectively.

In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the methods may also include the WANN indicating, and the wireless terminal device receiving an indication of a test resource of the applicable condition. The method may include the wireless access node assessing performance of the model under the applicable condition indicated by the wireless access network node, wherein the test resource is a dataset or reference signal or report resource that is associated with a reference resource. The method may include the wireless access node transmitting, to the WANN, a report of the model information in the report resource, wherein the report resource is associated with the applicable condition.

In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the methods may include the WANN of a first resource unit indicating the applicable condition information and/or model information to a wireless access network node of a second resource unit. The method may also include the WANN of the second resource unit determining, in response to the wireless terminal device switching from the first resource unit to the second resource unit, whether the wireless terminal device supports the use case or whether the wireless terminal device has an applicable model based on the indicated applicable condition information and/or model information received from the first resource, wherein the model information comprises whether the wireless terminal device has an applicable model for the corresponding applicable condition.

In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the methods may also include the WANN receiving, from a WANN of a second resource unit, applicable condition information of the second resource unit, and valid area and/or test resource information of the second resource unit. The methods may also include the WANN indicating, and the wireless terminal device receiving an indication of the applicable condition information of the second resource unit, and the valid area and/or test resource information of the second resource unit. The methods may include the wireless terminal device determining whether it has an applicable model for the second resource unit based on the applicable condition information and/or valid area and/or test resource of the second resource unit.

In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the methods may include the WANN indicating, and the wireless terminal device receiving an indication of an index of the applicable condition, wherein different ranges of the index are assigned to different vendors. The methods may also include the wireless terminal device assuming that a same index refers to a same applicable condition.

In some exemplary implementations, the resource unit is one of a carrier, a cell, a band, a bandwidth part (BWP) , or a Transmission and Reception Point (TRP) .

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) .

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.

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

FIG. 1 shows a wireless access network with an exemplary uplink, downlink, and control channel configuration.

FIG. 2 shows various example processing components of the wireless terminal device and the wireless access network node of FIG. 1.

FIG. 3 shows an example timing diagram illustrating relative periods of applicable condition information and update information.

DETAILED DESCRIPTION

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.

This disclosure is directed to handling transmissions in a wireless cellular access network and is specifically directed to mechanisms for managing models activated at a User Equipment (UE) side according to UE’s capability.

Wireless Network Overview

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.

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.

Wireless Communication Resource Scheduling/Signaling

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.

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.

Description of New Mechanisms for Communicating Applicable Conditions for Models

Many of the following embodiments are described with respect to “resource units. ” In various embodiments, a “resource unit” is one of a carrier, a cell, a band, a bandwidth part (BWP) , or a Transmission and Reception Point (TRP) . To reduce the duplication, in some instances, the embodiments are described with respect to “cell” below, however, the term “cell” may be replaced with “carrier, ” “band, ” “BWP, ” or “TRP, ” and the following description will apply equally or similarly. Also, the generic term “resource units” is also used herein, which represents a carrier, a cell, a band, a BWP, or a TRP generally.

In accordance with various embodiments, an overall use case of an applicable condition for a model can be summarized as follows. A base station 102 may indicate one or more applicable conditions of model in the resource unit. The resource unit can be cell, BWP, carrier, band, or TRP. The UE 104 may train the model with the data collected in this resource unit. When the UE 104 enters the resource unit again, the UE 104 can determine the applicable model based on the indicated applicable condition. The UE 104 can report the supported model to the base station 102. The base station 102 may manage the UE’s 104 model based on the UE’s 104 report, e.g., by activating/deactivating the model.

The applicable condition may be conditions that will impact the model inference performance. For example, if the UE 104 trains the model with a dataset collected under a first applicable condition, the inference performance of the model will be impacted if the model is applied under a second, different applicable condition. In various embodiments, an applicable condition can be, for example, deployment scenarios (e.g., UMi/Uma) , inter-site distance, antenna height, down tilt, NLOS probability, different gNB antenna array dimensions, DL Tx beam codebook (e.g., beam pointing direction, beam width, beam boresight direction (azimuth and elevation) ) , beam patterns (e.g., various Set B patterns, various Set A patterns, indexing/mapping of Set A and Set B) , TxRU (Transmit/Receive Unit) mapping, model complexity, model (nominal) output, PRS configuration, information on training dataset, inference validity area, network synchronization (e.g., TRP relative time differences) , gNB TX timing error, received power, TRP/ARP locations and orientation, TRP/PRS beam angles, mapping between PRS Resource and Set IDs to physical anchor/TRP locations, mapping between PRS resources and physical beam angles, required model performance information, or other conditions.

In various embodiments, the base station 102 may indicate the applicable condition information of a model in the resource unit to the UE 104. The UE 104 may determine the applicable condition of the model based on the indication from the base station 102. In another embodiment, the base station 102 may indicate the applicable condition information of the model for the resource unit and update information of the applicable condition to the UE 104. The indication can be periodic, aperiodic, or event triggered.

In an embodiment, the base station 102 may indicate the applicable condition information of the model for the resource unit and the update information of the applicable condition to the UE 104 periodically. The base station 102 may indicate the period and/or offset of the indication of the applicable condition information to the UE 104. The UE 104 may determine the time to receive the applicable condition information based on the indicated period and/or offset. In another approach, the base station 102 indicates the period and/or offset of the indication of the update information to the UE 104. The UE 104 may determine the time to receive the update information based on the indicated period and/or offset. The UE 104 may determine whether the applicable condition is updated or not based on the update information. If the applicable condition is updated, the UE 104 may receive the updated applicable condition information.

In various examples, the period of the indication of update information may be larger than the period of the indication of applicable condition information. Thus, the UE 104 may not need to monitor the applicable condition information frequently in order to reduce power consumption. In certain specific examples, the offset can be relative to the start of frame 0, or can be defined by other time points.

FIG. 3 shows an example timing diagram illustrating relative periods of applicable condition information and update information. In the example of FIG. 3, the base station 102 indicates the period and offset for the indication of applicable condition information as 160ms and 40ms, respectively. Then, the UE 104 can receive the indication of applicable condition information at 40ms, 200ms, 360ms, etc. Similarly, the base station 102 indicates the period and offset for the update information as 640ms and 120ms, respectively. Then, the UE 104 can receive the indication of the update information at 120ms, 760ms, 1400ms, etc.

As such, in accordance with various embodiments, a method performed by the wireless access network node (WANN) 102 (e.g., base station 102) includes indicating, to a wireless terminal device 104 (e.g., UE 104) , applicable condition information of a model and/or update information of the applicable condition in a resource unit to the wireless terminal device 104. Similarly, a method performed by the wireless terminal device 104 (e.g., UE 104) includes receiving, from the WANN 102, an indication of applicable condition information of a model and/or update information of the applicable condition in a resource unit to the wireless terminal device 104, and determining the applicable condition of the model based on the indication.

The methods may also include the WANN 102 indicating, and the wireless terminal device 104 receiving an indication of the applicable condition information periodically, and a period and/or an offset of the indication of the applicable condition information, wherein the wireless terminal device 104 determines a time to receive the applicable condition information based on the indicated period and/or offset. The methods may also include the WANN 102 indicating, and the wireless terminal device 104 receiving an indication of the applicable condition information and the update information of the applicable condition periodically, and a period and/or an offset of the indication of the update information of the applicable condition. The methods may also include the wireless terminal device 104 determining a time to receive the update information based on the indicated period and/or offset, and determining whether the applicable condition is updated based on the update information. The methods may also include the wireless terminal device 104 receiving, from the WANN 102, updated applicable condition information in response to receiving the indication of update information of the applicable condition. In various embodiments, a period of indication of the update information is larger than a period of an indication of the applicable condition information.

In various embodiments, the indication of update information includes one bit. In such an example, the following alternatives can be considered. Alt. 1: If the value of this bit is the same as the previous indication, it indicates the applicable condition is the same as the previous indication; if the value of this bit is toggled or is changed from the previous indication (e.g., from 0 to 1, or from 1 to 0) , it indicates the applicable condition is updated. Alt. 2: If the value of this bit is the same as the previous indication, it indicates the applicable condition is updated; if the value of this bit is toggled or is changed from the previous indication (e.g., from 0 to 1, or from 1 to 0) , it indicates the applicable condition is the same as the previous indication. Alt. 3: If the value of this bit is “0” , it indicates the applicable condition is updated; if the value of this bit is “1” , it indicates the applicable condition is the same as the previous indication. Alt. 4: If the value of this bit is “1” , it indicates the applicable condition is updated; if the value of this bit is “0” , it indicates the applicable condition is the same as the previous indication.

In one embodiment, the indication of update information includes one or more than one bit, where each bit corresponds to a use case. The base station 102 may indicate the mapping between each bit and the corresponding use case to the UE 104. The UE 104 may then determine whether the application condition for one use case is updated or not based on the corresponding bit. The same methods as described in Alt. 1 -Alt. 4 above can be applied here for the bit for each use case. In various examples, the use case can be, though is not limited to, AI/ML based beam prediction, positioning enhancement, CSI compression, CSI prediction, etc.

In one embodiment, the indication of update information includes one or more than one bit, where each bit corresponds to a group of use cases. Each group contains one or multiple use cases. The base station 102 may indicate the mapping between each bit and the corresponding group of use case to the UE 104. For example, the base station 102 may indicate that the 1st bit and 2nd bit correspond to group #1 and group #2, respectively, where AI/ML positioning enhancement is in the group #1, and AI/ML based beam prediction and CSI prediction are in the group #2. The UE 104 may determine whether the application condition for one group of use case is updated or not based on the corresponding bit. The same methods as described in Alt. 1 -Alt. 4 above can be applied here for the bit for each group of use case.

In one embodiment, the indication of update information includes one or more than one bit, where each bit corresponds to one applicable condition. The base station 102 may indicate the mapping between each bit and the corresponding applicable condition to the UE 104. The UE 104 then determines whether the application condition is updated or not based on the corresponding bit. The same methods as described in Alt. 1 -Alt. 4 above can be applied here for the bit for each applicable condition.

In one embodiment, the indication of update information includes one or more than one bit, where each bit corresponds to a group of applicable condition. Each group contains one or multiple applicable conditions. The base station 102 may indicate the mapping between each bit and the corresponding group of applicable condition to the UE 104. For example, the base station 102 may indicate that the 1st bit and 2nd bit correspond group #1 and group #2, respectively, where beam pattern is in the group #1, and the number of CSI ports, number of Tx antenna ports are in the group #2. The UE 104 may then determine whether the application condition in each group is updated or not based on the corresponding bit. The same methods as described in Alt. 1 -Alt. 4 above can be applied here for the bit for each group of applicable condition.

In various embodiments, the indication of update information is carried by DCI, system information, or paging information. In some examples, the indication of update information is carried by broadcast message.

In one embodiment, the indication of applicable condition information includes one or more than one bit for each use case. Different use cases may require different number of bits for the indication of applicable condition information. The base station 102 may indicate the mapping between the bits and the corresponding use case. The base station 102 may indicate the mapping between bit values and the corresponding state of applicable condition for each use case. The UE 104 may determine the state of applicable condition of each use case based on the corresponding bits. As an example, the base station 102 may indicate two bits to the UE 104 to indicate the applicable condition for the AI/ML based beam prediction, and indicates mapping information between the bit value and detailed state of applicable condition to the UE 104. An example of such mapping information appears below in Table 1. If the UE 104 has two models that are trained with the dataset under the first and second state of the applicable condition, if the UE 104 enters the cell and the base station 102 indicates the second state of applicable condition to the UE 104 for this cell, the UE 104 knows it should apply the model that is trained with the dataset under the second state of applicable condition.

Table 1

In one embodiment, the indication of applicable condition information includes one or more than one bit for each group of use case. Different groups of use case may require different number of bits for the indication of applicable condition information. The base station 102 may indicate the mapping between the bits and the corresponding groups of use case. The base station 102 may indicate the mapping between the bit values and the corresponding state of applicable conditions for each group of use case. The UE 104 may determine the state of applicable condition of each group of use case based on the corresponding bits.

In one embodiment, the indication of applicable condition information includes one or more than one bit for applicable condition. Different applicable conditions may require different number of bits for the indication of applicable condition information. The base station 102 may indicate the mapping between the bits and the corresponding applicable condition. The base station 102 may indicate the mapping between the bit value and the corresponding state of applicable condition. The UE 104 may determine the state of applicable condition based on the corresponding bits.

As such, in accordance with various embodiments, the methods may include the WANN 102 indicating, and the wireless terminal device 104 receiving an indication of a mapping between each bit of one or more bits of the indication of update information to: a corresponding use case; a corresponding group of use cases, wherein each group of use cases includes one or more use cases; a corresponding applicable condition; or a corresponding group of applicable conditions, wherein each group of applicable conditions includes one or more applicable conditions. The methods may also include the wireless terminal device 104 determining whether the application condition is updated based on at least one corresponding bit. The methods may include the WANN 102 indicating, and the wireless terminal device 104 receiving an indication of the update information of the applicable condition via Downlink Control Information (DCI) , system information, or paging information.

In various embodiments, the indication of update information includes at least a first bit, and methods may also include the WANN 102 indicating to the wireless terminal device 104 that the applicable condition is the same as a previous indication by transmitting a value of the first bit that is a same as a previous value of the first bit, or that the applicable condition is updated by transmitting a value of the first bit that is a different value from the previous value of the first bit. Similarly, the methods may include the wireless terminal device 104 receiving, from the WANN 102, a value of the first bit that is a same as a previous value of the first bit, and responsively determining that the applicable condition is the same as a previous indication; or receiving, from the WANN 102, a value of the first bit that is a different value from the previous value of the first bit, and responsively determining that the applicable condition is updated. Similarly, the methods may include the WANN 102 indicating to the wireless terminal device 104 that the applicable condition is updated by transmitting a first value of the first bit, or indicating that the applicable condition is the same as a previous indication by transmitting a second value of the first bit that is an opposite value as the first value. Similarly still, the methods may include the wireless terminal device 104 receiving, from the WANN 102, a first value of the first bit, and responsively determining that the applicable condition is updated; or a second value of the first bit that is an opposite value as the first value, and responsively determining that the applicable condition is the same as a previous indication.

In various embodiments, the methods may include the WANN 102 indicating, and the wireless terminal device 104 receiving an indication of a mapping between each bit of one or more bits of the applicable condition information to: a corresponding use case; a corresponding group of use cases; or a corresponding applicable condition; and a mapping between bit values of the one or more bits of the applicable condition information and a corresponding state of the applicable condition. The methods may include the wireless terminal device 104 determining a state of the applicable condition based on the corresponding one or more bits.

UE initiated applicable condition indication

In various embodiments, if the UE 104 enters one resource unit (e.g., a cell) and finds the applicable condition is broadcast, the UE 104 may require the base station 102 to indicate the applicable condition information to the UE 104.

In one embodiment, the base station 102 indicates a mapping between each applicable condition and a Random Access Channel (RACH) resource. The UE 104 may send the RACH resource to the base station 102 to request indication of applicable condition. The base station may determine the requested applicable condition based on the RACH resource sent by the UE 104. The base station 102 may then indicate the information of the requested applicable condition to the UE 104.

In one embodiment, the base station 102 may indicate mapping between each group of applicable conditions and a RACH resource. The UE 104 may send the RACH resource to the base station 102 to request indication of applicable condition information. The based station 102 may determine the requested group of applicable conditions based on the RACH resource sent by the UE 104. The base station 102 may indicate the information of the requested group of applicable condition to the UE 104.

In one embodiment, the base station 102 may indicate mapping between applicable conditions of each use case and a RACH resource. The UE 104 may send the RACH resource to the base station 102 to request indication of applicable condition. The base station 102 may determine the requested applicable condition of the use case based on the RACH resource sent by the UE 104. The base station 102 may indicate the information of the requested applicable condition of each use case to the UE 104.

In one embodiment, the base station 102 may indicate the indication period of each applicable condition to the UE 104. The base station 102 may indicate mapping between each period of applicable condition and the RACH resource. The UE 104 may send the RACH resource to the base station 102 to request indication of applicable condition. The based station 102 may determine the period of applicable condition based on the RACH resource sent by the UE 104. The base station 102 may indicate the information of the applicable condition that has the same indication period with the requested period to the UE 104.

In various examples, the RACH resource can be a RACH preamble or signaling carried in the message sent from the UE 104 to the base station 102, e.g., a MSG3 message.

For example, the base station 102 may indicate that the period of the first, second, and third applicable condition is 160ms, 160ms and 320ms, respectively. The first and second preambles are mapped with the period of 160ms and 320ms, respectively. If the UE 104 indicates the first preamble to the base station 102, the base station 102 understands that UE 104 requests the applicable condition that are with 160ms indication period, i.e., the first and second applicable condition. Then the base station 102 would indicate the first and second applicable condition to the UE 104 with the period requested by the UE 104 (which is the same as the indication period) .

As such, in accordance with various embodiments, the methods may also include the WANN 102 indicating, and the wireless terminal device 104 receiving an indication of a mapping between each applicable condition and a RACH resource. The wireless terminal device 104 may transmit, and the WANN 102 may receive the RACH resource. Then, the methods may include the WANN 102 indicating, and the wireless terminal device 104 receiving an indication of information of the applicable condition corresponding to the RACH resource received from the wireless terminal device.

The methods may also include the WANN 102 indicating, and the wireless terminal device 104 receiving an indication of a mapping between each group of applicable conditions and a RACH resource. The wireless terminal device 104 may transmit, and the WANN 102 may receive the RACH resource. Then, the methods may include the WANN 102 indicating, and the wireless terminal device 104 receiving an indication of information of the group of applicable conditions corresponding to the RACH resource received from the wireless terminal device.

The methods may also include the WANN 102 indicating, and the wireless terminal device 104 receiving an indication of a mapping between each applicable condition of each use case and a RACH resource. The wireless terminal device 104 may transmit, and the WANN 102 may receive the RACH resource. Then, the methods may include the WANN 102 indicating, and the wireless terminal device 104 receiving an indication of information of the applicable condition of each use case corresponding to the RACH resource received from the wireless terminal device.

The methods may also include the WANN 102 indicating, and the wireless terminal device 104 receiving an indication of an indication period of each applicable condition, and a mapping between each period of each applicable condition and a RACH resource. The wireless terminal device 104 may transmit, and the WANN 102 may receive the RACH resource. Then, the methods may include the WANN 102 indicating, and the wireless terminal device 104 receiving an indication of information of the applicable condition that has a same indication period as the requested period.

The methods may also include the wireless terminal device 104 transmitting the RACH resource as a RACH preamble or signaling carried in a message sent to the WANN 102.

Associated information of the applicable condition

When indicating the applicable condition information and/or update information to the UE 104, the base station 102 can also indicate the valid area of the indication. In various embodiments, the base station 102 may indicate the valid area of the indication of applicable condition information and/or update information to the UE 104. The valid area can be at least one of the following:

Alt. 1: A list of resource units indicated by the base station 102.

Alt. 2: All the neighboring cells of the resource unit.

Alt. 3: All the neighboring cells with the same frequency of the resource unit.

Alt. 4: All the neighboring cells in the same band of the resource unit.

Alt. 5: All the neighboring cells in the same frequency range of the resource unit.

Alt. 6: All the serving cells in the same band of the resource unit.

Alt. 7: All the serving cells in the same frequency range of the resource unit.

Alt. 8: A list of regions indicated by the base station 102. The region can be system information area, tracking area, paging area, broadcast/multicast area, etc.

Note that, some of the alternatives above do not require indication of the valid area. For example, if the valid area is by default all the neighboring cells, as long as the base station 102 and the UE 104 have the same understanding on this, the base station 102 does not need to indicate the valid area to the UE 104.

In one embodiment, the same indication of applicable condition information and/or update information to the UE 104 is applied in the valid area. The UE 104 may determine the applicable condition information and/or update information based on the valid area.

For example, if the base station 102 indicates the first beam pattern as the applicable condition to the UE 104, and indicates the valid area as all the neighboring cells, then the UE 104 may assume the first beam pattern is applied in all the neighboring cells.

In another embodiment, the indication of applicable condition information and/or update information to the UE 104 is comparable in the valid area. In other words, the base station 102 can indicate the same or different applicable condition information and/or update information to the UE 104 in the valid area. However, the same applicable condition information indication or update information indication in the valid area may refer to the same applicable condition or update information, respectively, and different applicable condition information indication or update information indication in the valid area may refer to different applicable condition or update information, respectively. The indication of applicable condition information and/or update information to the UE 104 is comparable in different valid areas is not comparable. In other words, even if the same indication of applicable condition information and/or update information is indicated to the UE 104 in different valid areas, different applicable condition information and/or update information may be applied in these different valid areas. This can be used to address inter-vendor collaboration issues. For example, base stations from the same vendor may be indicated as the same valid area.

The base station 102 may indicate the test resource of the applicable condition information. The UE 104 may assess the performance of the model under the applicable condition indicated by the base station 102 via the test resource. The test resource can be dataset or reference signal (e.g., CSI-RS, PRS) or report resource that is associated with reference resource (e.g., CSI report that is associated with CSI-RS resource, PRS measurement report) . The dataset may contain nominal model input and nominal model output. The UE 104 can use the nominal model input to generate the actual model output. The UE 104 can determine the performance of the model by comparing the nominal model output and actual model output. Similarly, the UE 104 can use the previous measurement result of the reference signal as model input and generate model output. Then the UE 104 can determine the performance of the model by comparing the model output and the actual measurement result of the reference signal. The reference signal can be SSB, CSI-RS, or other downlink reference signals. The UE 104 may also report the performance of the model to the base station 102.

In one embodiment, the report resource is associated with the applicable condition information. After receiving the applicable condition information and the test resource, the UE 104 may report the model information to the base station 102 in the report resource.

The report resource may be a set of time/frequency domain resources for the UE 104 to report the model information. The model information may be the supported model, supported functionality, supported use case, model performance information, or other model related information.

As such, in accordance with various embodiments, the methods may include the WANN 102 indicating, and the wireless terminal device 104 receiving an indication of a valid area of the indication of applicable condition information and/or the update information. In various embodiments, the valid area comprises at least one of the following: a list of resource units indicated by the wireless access network node; all neighboring cells of the resource unit; all neighboring cells with a same frequency of the resource unit; all neighboring cells in a same band of the resource unit; all neighboring cells in a same frequency range of the resource unit; all serving cells in a same band of the resource unit; all serving cells in a same frequency range of the resource unit; and/or a list of regions indicated by the base station, wherein the regions are at least one of system information area, tracking area, paging area, or broadcast/multicast area.

The methods may also include the wireless terminal device 104 determining the applicable condition information and/or the update information based on the valid area, wherein a same indication of applicable condition information and/or update information is applied in the valid area, and/or wherein the indication of applicable condition information and/or the update information is comparable in the valid area. In various embodiments, a same applicable condition information indication or update information indication in the valid area refers to a same applicable condition or update information, respectively, and/or a different applicable condition information indication or update information indication in the valid area refers to a different applicable condition or update information, respectively.

The methods may also include the WANN 102 indicating, and the wireless terminal device 104 receiving an indication of a test resource of the applicable condition. The method may include the wireless access node 104 assessing performance of the model under the applicable condition indicated by the wireless access network node, wherein the test resource is a dataset or reference signal or report resource that is associated with a reference resource. The method may include the wireless access node 104 transmitting, to the WANN 102, a report of the model information in the report resource, wherein the report resource is associated with the applicable condition.

Global application condition indication

In the case of a handover, information exchange about applicable condition can be applied to facilitate the procedure. The information exchange can also be applied to other resource unit changes, e.g., BWP switching.

For example, a base station of a first resource unit (e.g., cell, carrier, band, BWP, or TRP) indicates the applicable condition information and/or model information to the base station of a second resource unit. When the UE 104 switches from the first resource unit to the second resource unit, the base station of the second resource unit can determine whether the UE 104 supports the use case or whether the UE 104 has an applicable model based on the indicated applicable condition information and/or model information from the base station of the first resource unit. The model information can be whether the UE 104 has the applicable model for the corresponding applicable condition.

In one embodiment, the base station of the second resource unit indicates the applicable condition information to the base station of the first resource unit. The base station of the first resource unit indicates the applicable condition information of the second resource unit to the UE 104. In addition to that, the base station of the second resource unit may also indicate the valid area and/or test resource to the base station of the first resource unit. The base station of the first resource unit indicates the valid area and/or test resource of the second resource unit to the UE 104. The UE 104 determines whether it has an applicable model for the second resource unit based on the applicable condition information and/or valid area and/or test resource of the second resource unit.

As such, in accordance with various embodiments, the methods may include the WANN of a first resource unit indicating the applicable condition information and/or model information to a wireless access network node of a second resource unit. The method may also include the WANN of the second resource unit determining, in response to the wireless terminal device 104 switching from the first resource unit to the second resource unit, whether the wireless terminal device 104 supports the use case or whether the wireless terminal device 104 has an applicable model based on the indicated applicable condition information and/or model information received from the first resource, wherein the model information comprises whether the wireless terminal device has an applicable model for the corresponding applicable condition.

The methods may also include the WANN 102 receiving, from a WANN of a second resource unit, applicable condition information of the second resource unit, and valid area and/or test resource information of the second resource unit. The methods may also include the WANN 102 indicating, and the wireless terminal device 104 receiving an indication of the applicable condition information of the second resource unit, and the valid area and/or test resource information of the second resource unit. The methods may include the wireless terminal device 104 determining whether it has an applicable model for the second resource unit based on the applicable condition information and/or valid area and/or test resource of the second resource unit.

Global application condition indication

The base station 102 may indicate an index of the applicable condition to the UE 104. Different ranges of the index may be assigned to different vendors, e.g., operator assigns different range of the index to different vendors. The UE 104 may assume that the same index refers the same applicable condition. The UE 104 may also report the index of the applicable condition to the base station 102 when reporting the model information to the base station.

As such, in accordance with various embodiments, the methods may include the WANN 102 indicating, and the wireless terminal device 104 receiving an indication of an index of the applicable condition, wherein different ranges of the index are assigned to different vendors. The methods may also include the wireless terminal device 104 assuming that a same index refers to a same applicable condition.

UE reports model performance information to the base station

The UE 104 may report the model performance information to the base station 102. The base station 102 may indicate the required model performance information to the UE 104, and the UE 104 may determine the applicable model based on the required model performance information.

For example, the UE may have two models for positioning, where one model is with 1m positioning accuracy and another mode is with 0.1m positioning accuracy. The base station 102 may indicate the required model performance information as 1m. As such, the UE 104 may determine that both of the models are applicable.

The model performance information can be positioning accuracy, CSI prediction accuracy, beam prediction accuracy, CSI compression ratio, CSI reconstruction similarity, modulation accuracy, error rate, etc.

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.

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.

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.

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.

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

A method performed by a wireless access network node comprising:

indicating, to a wireless terminal device, applicable condition information of a model and/or update information of the applicable condition in a resource unit to the wireless terminal device.
The method according to claim 1, comprising:

indicating, to the wireless terminal device, the applicable condition information periodically; and

indicating, to the wireless terminal device, a period and/or an offset of the indication of the applicable condition information.
The method according to any of claims 1-2, comprising:

indicating, to the wireless terminal device, the applicable condition information and the update information of the applicable condition periodically; and

indicating, to the wireless terminal device, a period and/or an offset of the indication of the update information of the applicable condition.
The method according to any of claims 1-3,

wherein a period of indication of the update information is larger than a period of an indication of the applicable condition information.
The method according to any of claims 1-4, comprising:

indicating, to the wireless terminal device, a mapping between each bit of one or more bits of the indication of update information to:

a corresponding use case;

a corresponding group of use cases, wherein each group of use cases includes one or more use cases;

a corresponding applicable condition; or

a corresponding group of applicable conditions, wherein each group of applicable conditions includes one or more applicable conditions.
The method according to any of claims 1-5, comprising:

indicating, to the wireless terminal device, the update information of the applicable condition via Downlink Control Information (DCI) , system information, or paging information.
The method according to any of claims 1-6,

wherein the indication of update information includes at least a first bit,

the method comprising:

indicating, to the wireless terminal device, that the applicable condition is the same as a previous indication by transmitting a value of the first bit that is a same as a previous value of the first bit; or

indicating, to the wireless terminal device, that the applicable condition is updated by transmitting a value of the first bit that is a different value from the previous value of the first bit.
The method according to any of claims 1-7,

wherein the indication of update information includes at least a first bit,

the method comprising:

indicating, to the wireless terminal device, that the applicable condition is updated by transmitting a first value of the first bit; or

indicating, to the wireless terminal device, that the applicable condition is the same as a previous indication by transmitting a second value of the first bit that is an opposite value as the first value.
The method according to any of claims 1-8, comprising:

indicating, to the wireless terminal device, a mapping between each bit of one or more bits of the applicable condition information to:

a corresponding use case;

a corresponding group of use cases; or

a corresponding applicable condition; and

indicating, to the wireless terminal device, a mapping between bit values of the one or more bits of the applicable condition information and a corresponding state of the applicable condition.
The method according to any of claims 1-9, comprising:

indicating, to the wireless terminal device, a mapping between each applicable condition and a Random Access Channel (RACH) resource;

receiving, from the wireless terminal device, the RACH resource; and

indicating, to the wireless terminal device, information of the applicable condition corresponding to the RACH resource received from the wireless terminal device.
The method according to any of claims 1-9, comprising:

indicating, to the wireless terminal device, a mapping between each group of applicable conditions and a Random Access Channel (RACH) resource;

receiving, from the wireless terminal device, the RACH resource; and

indicating, to the wireless terminal device, information of the group of applicable conditions corresponding to the RACH resource received from the wireless terminal device.
The method according to any of claims 1-9, comprising:

indicating, to the wireless terminal device, a mapping between each applicable condition of each use case and a Random Access Channel (RACH) resource;

receiving, from the wireless terminal device, the RACH resource; and

indicating, to the wireless terminal device, information of the applicable condition of each use case corresponding to the RACH resource received from the wireless terminal device.
The method according to any of claims 1-9, comprising:

indicating, to the wireless terminal device, an indication period of each applicable condition;

indicating, to the wireless terminal device, a mapping between each period of each applicable condition and a Random Access Channel (RACH) resource;

receiving, from the wireless terminal device, the RACH resource; and

indicating, to the wireless terminal device, information of the applicable condition that has a same indication period as the requested period.
The method according to any of claims 10-13, wherein the RACH resource comprises a RACH preamble or signaling carried in a message sent from the wireless terminal device to the wireless access network node.
The method according to any of claims 1-14, comprising:

indicating, to the wireless terminal device, a valid area of the indication of applicable condition information and/or the update information.
The method according to claim 15, wherein the valid area comprises at least one of the following:

a list of resource units indicated by the wireless access network node;

all neighboring cells of the resource unit;

all neighboring cells with a same frequency of the resource unit;

all neighboring cells in a same band of the resource unit;

all neighboring cells in a same frequency range of the resource unit;

all serving cells in a same band of the resource unit;

all serving cells in a same frequency range of the resource unit; and/or

a list of regions indicated by the base station, wherein the regions are at least one of system information area, tracking area, paging area, or broadcast/multicast area.
The method according to any of claims 15-16,

wherein a same indication of applicable condition information and/or update information is applied in the valid area, and/or

wherein the indication of applicable condition information and/or the update information is comparable in the valid area.
The method according to any of claims 15-17, wherein a same applicable condition information indication or update information indication in the valid area refers to a same applicable condition or update information, respectively, and/or wherein a different applicable condition information indication or update information indication in the valid area refers to a different applicable condition or update information, respectively.
The method according to any of claims 15-17, comprising:

indicating, to the wireless terminal device, a test resource of the applicable condition,

wherein the wireless terminal device assesses performance of the model under the applicable condition indicated by the wireless access network node,

wherein the test resource is a dataset or reference signal or report resource that is associated with a reference resource.
The method according to claim 19, comprising:

receiving, from the wireless terminal device, a report of the model information in the report resource,

wherein the report resource is associated with the applicable condition.
The method according to any of claims 1-20,

wherein the wireless access network node of a first resource unit indicates the applicable condition information and/or model information to a wireless access network node of a second resource unit,

the method comprising:

determining, in response to the wireless terminal device switching from the first resource unit to the second resource unit, whether the wireless terminal device supports the use case or whether the wireless terminal device has an applicable model based on the indicated applicable condition information and/or model information received from wireless access network node of the first resource,

wherein the model information comprises whether the wireless terminal device has an applicable model for the corresponding applicable condition.
The method according to any of claims 1-20, comprising:

receiving, from a wireless access network node of a second resource unit, applicable condition information of the second resource unit;

indicating, to the wireless terminal device, the applicable condition information of the second resource unit;

receiving, from the wireless access network node of the second resource unit, valid area and/or test resource information of the second resource unit; and

indicating, to the wireless terminal device, the valid area and/or test resource information of the second resource unit.
The method according to any of claims 1-22, comprising:

indicating, to the wireless terminal device, an index of the applicable condition, wherein different ranges of the index are assigned to different vendors.
A method performed by a wireless terminal device comprising:

receiving, from a wireless access network node, an indication of applicable condition information of a model and/or update information of the applicable condition in a resource unit to the wireless terminal device; and

determining the applicable condition of the model based on the indication from the wireless access network node.
The method according to claim 24, comprising:

receiving, from the wireless access network node, an indication of the applicable condition information periodically;

receiving, from the wireless access network node, an indication of a period and/or an offset of the indication of the applicable condition information; and

determining a time to receive the applicable condition information based on the indicated period and/or offset.
The method according to any of claims 24-25, comprising:

receiving, from the wireless access network node, an indication of the applicable condition information and the update information of the applicable condition periodically;

receiving, from the wireless access network node, an indication of a period and/or an offset of the indication of the update information of the applicable condition;

determining a time to receive the update information based on the indicated period and/or offset; and

determining whether the applicable condition is updated based on the update information.
The method according to any of claims 24-26, comprising:

receiving, from the wireless access network node, updated applicable condition information in response to receiving, from the wireless access network node, the indication of update information of the applicable condition.
The method according to any of claims 24-27,

wherein a period of indication of the update information is larger than a period of an indication of the applicable condition information.
The method according to any of claims 24-28, comprising:

receiving, from the wireless access network node, an indication of a mapping between each bit of one or more bits of the indication of update information to:

a corresponding use case;

a corresponding group of use cases, wherein each group of use cases includes one or more use cases;

a corresponding applicable condition; or

a corresponding group of applicable conditions, wherein each group of applicable conditions includes one or more applicable conditions; and

determining whether the application condition is updated based on at least one corresponding bit.
The method according to any of claims 24-29, comprising:

receiving, from the wireless access network node, the indication of the update information of the applicable condition via Downlink Control Information (DCI) , system information, or paging information.
The method according to any of claims 24-30,

wherein the indication of update information includes at least a first bit,

the method comprising:

receiving, from the wireless access network node, a value of the first bit that is a same as a previous value of the first bit, and responsively determining that the applicable condition is the same as a previous indication; or

receiving, from the wireless access network node, a value of the first bit that is a different value from the previous value of the first bit, and responsively determining that the applicable condition is updated.
The method according to any of claims 24-30,

wherein the indication of update information includes at least a first bit,

the method comprising:

receiving, from the wireless access network node, a first value of the first bit, and responsively determining that the applicable condition is updated; or

receiving, from the wireless access network node, a second value of the first bit that is an opposite value as the first value, and responsively determining that the applicable condition is the same as a previous indication.
The method according to any of claims 24-32, comprising:

receiving, from the wireless access network node, an indication of a mapping between each bit of one or more bits of the applicable condition information to:

a corresponding use case;

a corresponding group of use cases; or

a corresponding applicable condition;

receiving, from the wireless access network node, an indication of a mapping between bit values of the one or more bits of the applicable condition information and a corresponding state of the applicable condition; and

determining a state of the applicable condition based on the corresponding one or more bits.
The method according to any of claims 24-33, comprising:

receiving, from the wireless access network node, an indication of a mapping between each applicable condition and a Random Access Channel (RACH) resource;

transmitting, to the wireless access network node, the RACH resource; and

receiving, from the wireless access network node, an indication of information of the applicable condition corresponding to the RACH resource received from the wireless terminal device.
The method according to any of claims 24-33, comprising:

receiving, from the wireless access network node, an indication of a mapping between each group of applicable conditions and a Random Access Channel (RACH) resource;

transmitting, to the wireless access network node, the RACH resource; and

receiving, from the wireless access network node, an indication of information of the group of applicable conditions corresponding to the RACH resource received from the wireless terminal device.
The method according to any of claims 24-33, comprising:

receiving, from the wireless access network node, an indication of a mapping between each applicable condition of each use case and a Random Access Channel (RACH) resource;

transmitting, to the wireless access network node, the RACH resource; and

receiving, from the wireless access network node, an indication of information of the applicable condition of each use case corresponding to the RACH resource received from the wireless terminal device.
The method according to any of claims 24-33, comprising:

receiving, from the wireless access network node, an indication of an indication period of each applicable condition;

receiving, from the wireless access network node, an indication of a mapping between each period of each applicable condition and a Random Access Channel (RACH) resource;

transmitting, to the wireless access network node, the RACH resource; and

receiving, from the wireless access network node, an indication of information of the applicable condition that has a same indication period as the requested period.
The method according to any of claims 34-37, comprising:

transmitting the RACH resource as a RACH preamble or signaling carried in a message sent to the wireless access network node.
The method according to any of claims 24-38, comprising:

receiving, from the wireless access network node, an indication of a valid area of the indication of applicable condition information and/or the update information.
The method according to claim 39, wherein the valid area comprises at least one of the following:

a list of resource units indicated by the wireless access network node;

all neighboring cells of the resource unit;

all neighboring cells with a same frequency of the resource unit;

all neighboring cells in a same band of the resource unit;

all neighboring cells in a same frequency range of the resource unit;

all serving cells in a same band of the resource unit;

all serving cells in a same frequency range of the resource unit; and/or

a list of regions indicated by the base station, wherein the regions are at least one of system information area, tracking area, paging area, or broadcast/multicast area.
The method according to any of claims 39-40, comprising:

determining the applicable condition information and/or the update information based on the valid area,

wherein a same indication of applicable condition information and/or update information is applied in the valid area, and/or

wherein the indication of applicable condition information and/or the update information is comparable in the valid area.
The method according to any of claims 39-41, wherein a same applicable condition information indication or update information indication in the valid area refers to a same applicable condition or update information, respectively, and/or wherein a different applicable condition information indication or update information indication in the valid area refers to a different applicable condition or update information, respectively.
The method according to any of claims 39-41, comprising:

receiving, from the wireless access network node, an indication of a test resource of the applicable condition; and

assessing performance of the model under the applicable condition indicated by the wireless access network node,

wherein the test resource is a dataset or reference signal or report resource that is associated with a reference resource.
The method according to claim 43, comprising:

transmitting, to the wireless access network node, a report of the model information in the report resource,

wherein the report resource is associated with the applicable condition.
The method according to any of claims 24-44, comprising:

receiving, from the wireless access network node, applicable condition information of a second resource unit;

receiving, from the wireless access network node, valid area and/or test resource information of the second resource unit; and

determining whether the wireless terminal device has an applicable model for the second resource unit based on the applicable condition information and/or valid area and/or test resource of the second resource unit.
The method according to any of claims 24-45, comprising:

receiving, from the wireless access network node, an indication of an index of the applicable condition, wherein different ranges of the index are assigned to different vendors; and

assuming that a same index refers to a same applicable condition.
The method according to any of claims 1 to 46,

wherein the resource unit is one of a carrier, a cell, a band, a bandwidth part (BWP) , or a Transmission and Reception Point (TRP) .
An apparatus for wireless communication comprising a processor that is configured to carry out the method of any of claims 1 to 47.
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 47.