Method and procedure for CSI-RS configurations for ai based CSI prediction and ai based joint CSI prediction and compression

Abstract

Apparatuses, systems, and methods for Al based CSI (Channel State Information) feedback with CSI prediction, including systems, methods, and mechanisms for a user equipment device (UE) to determine a measurement window for a CSI prediction and determine a prediction window for a ground truth measurement. The measurement window and prediction window may correspond to a single CSI Reference Signal (RS) resource set. The measurement window and prediction window may correspond to different CSI-RS resource sets. A CSI-RS may be aperiodic.

Description

METHOD AND PROCEDURE FORCSI-RS CONFIGURATIONS FOR Al BASED CSI PREDICTION AND Al BASED JOINT CSI PREDICTION AND COMPRESSIONFIELD

[0001] The invention relates to wireless communications, and more particularly to apparatuses, systems, and methods for channel state information reference signal (CSI-RS) configurations for artificial intelligence (Al) based channel state information (CSI) prediction and Al based joint CSI prediction and compression, including systems, methods, and mechanisms for data collection, training, and performance monitoring of Al models.DESCRIPTION OF THE RELATED ART

[0002] Wireless communication systems are rapidly growing in usage. In recent years, wireless devices such as smart phones and tablet computers have become increasingly sophisticated. In addition to supporting telephone calls, many mobile devices now provide access to the internet, email, text messaging, and navigation using the global positioning system (GPS), and are capable of operating sophisticated applications that utilize these functionalities. Additionally, there exist numerous different wireless communication technologies and standards.

[0003] Long Term Evolution (LTE), also referred to as the Evolved Universal Terrestrial Radio Access Network (E-UTRAN, has been the technology of choice for the majority of wireless network operators worldwide, providing mobile broadband data and high-speed Internet access to their subscriber base. LTE was first proposed in 2004 and was first standardized in 2008. Since then, as usage of wireless communication systems has expanded exponentially, demand has risen for wireless network operators to support a higher capacity for a higher density of mobile broadband users. Thus, in 2015 study of a new radio access technology began and, in 2017, a first release of the Third Generation Partnership Project (3GPP) Fifth Generation New Radio (5G NR) was standardized. 5th generation mobile networks or 5th generation wireless systems, referred to as 3GPP NR (otherwise known as 5G-NR or NR-5G for 5G New Radio, also simply referred to as NR). NR proposes a higher capacity for a higher density of mobile broadband users, alsosupporting device-to-device, ultra-reliable, and massive machine communications, as well as lower latency and lower battery consumption, than LTE standards.

[0004] 5G-NR provides, as compared to LTE, a higher capacity for a higher density of mobile broadband users, while also supporting device-to-device, ultra-reliable, and massive machine type communications with lower latency and / or lower battery consumption. Further, NR may allow for more flexible UE scheduling as compared to current LTE. Consequently, efforts are being made in ongoing developments of 5G-NR to take advantage of higher throughputs possible at higher frequencies.

[0005] One aspect of wireless communication systems, e.g., systems for NR cellular wireless communications, is the transmission and measurement of reference signals, including channel state information reference signals (CSLRS).SUMMARY

[0006] Embodiments relate to wireless communications, and more particularly to apparatuses, systems, and methods for channel state information reference signal (CSI-RS) configurations for artificial intelligence (Al) based channel state information (CSI) prediction and Al based joint CSI prediction and compression, including systems, methods, and mechanisms for data collection, training, and performance monitoring of Al models.

[0007] Embodiments relate to wireless communications, and more particularly to apparatuses, systems, and methods for a device configured for communicating in a wireless communication network, comprising: one or more processors, coupled to a memory, configured to: determining a measurement window for a CSI prediction; and determining a prediction window for a ground truth measurement, wherein the measurement window corresponds to a CSI reference signal (CSI-RS) resource set.

[0008] Other embodiments relate to a user equipment comprising: one or more processors, coupled to a memory, configured to: determine a measurement window for a CSI prediction, wherein the measurement window corresponds to a CSI reference signal (CSI-RS) resource set.

[0009] The techniques described herein may be implemented in and / or used with a number of different types of devices, including but not limited to base stations, access points, cellular phones, tablet computers, wearable computing devices, portable mediaplayers, vehicles, and any of various other computing devices.

[0010] This Summary is intended to provide a brief overview of some of the subject matter described in this document. Accordingly, it will be appreciated that the abovedescribed features are merely examples and should not be construed to narrow the scope or spirit of the subject matter described herein in any way. Other features, aspects, and advantages of the subject matter described herein will become apparent from the following Detailed Description, Figures, and Claims.BRIEF DESCRIPTION OF THE DRAWINGS

[0011] A better understanding of the present subject matter can be obtained when the following detailed description of various embodiments is considered in conjunction with the following drawings, in which:

[0012] Figure 1A illustrates an example wireless communication system according to some embodiments.

[0013] Figure IB illustrates an example of a base station and an access point in communication with a user equipment (UE) device, according to some embodiments.

[0014] Figure 2 illustrates an example block diagram of a base station, according to some embodiments.

[0015] Figure 3 illustrates an example block diagram of a server according to some embodiments.

[0016] Figure 4 illustrates an example block diagram of a UE according to some embodiments.

[0017] Figure 5 illustrates an example block diagram of cellular communication circuitry, according to some embodiments.

[0018] Figure 6A illustrates an example of a 5G network architecture that incorporates both 3GPP (e.g., cellular) and non-3GPP (e.g., non-cellular) access to the 5G CN, according to some embodiments.

[0019] Figure 6B illustrates an example of a 5G network architecture that incorporates both dual 3GPP (e.g., LTE and 5G NR) access and non-3GPP access to the 5G CN, according to some embodiments.

[0020] Figure 7 illustrates an example of a baseband processor architecture for a UE, according to some embodiments.

[0021] Figure 8 illustrates an example of a device in accordance with some embodiments.

[0022] Figure 9 illustrates an example baseband circuitry in accordance with some embodiments.

[0023] Figure 10 illustrates an example of a control plane protocol stack in accordance with some embodiments.

[0024] Figure 11 illustrates an example timing diagram of utilizing CSI feedback, according to some embodiments.

[0025] Figure 12A illustrates an example of CSI feedback based on a periodic CSI-RS in accordance with some embodiments.

[0026] Figure 12B illustrates an example of CSI feedback based on a periodic CSI-RS in accordance with some embodiments.

[0027] Figure 13 illustrates an example of a two-sided Al model for CSI compression, according to some embodiments.

[0028] Figure 14 illustrates an example of a one-sided Al model for CSI prediction, according to some embodiments.

[0029] Figure 15 illustrates an example of an Al model for joint CSI prediction and compression, according to some embodiments.

[0030] Figure 16 illustrates an example of CSI prediction based on a CSI-RS resource set in accordance with some embodiments.

[0031] Figure 17 illustrates an example timing diagram of training and / or performance monitoring of an Al model for CSI prediction according to some embodiments.

[0032] Figure 18 illustrates an example timing diagram of training and / or performance an Al model for CSI prediction according to some embodiments.

[0033] Figure 19 illustrates an example timing diagram of performance monitoring of an Al model for CSI prediction according to some embodiments.

[0034] Figure 20 illustrates a block diagram of an example of a method to performtraining or performance monitoring for channel state information (CSI) prediction using an artificial intelligence (Al) model, according to some embodiments.

[0035] While the features described herein may be susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and are herein described in detail. It should be understood, however, that the drawings and detailed description thereto are not intended to be limiting to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents and alternatives falling within the spirit and scope of the subject matter as defined by the appended claims.DETAILED DESCRIPTION

[0036] The following is a glossary of terms used in this disclosure:

[0037] Memory Medium - Any of various types of non-transitory memory devices or storage devices. The term “memory medium” is intended to include an installation medium, e.g., a CD- ROM, floppy disks, or tape device; a computer system memory or randomaccess memory such as DRAM, DDR RAM, SRAM, EDO RAM, Rambus RAM, etc.; a non-volatile memory such as a Flash, magnetic media, e.g., a hard drive, or optical storage; registers, or other similar types of memory elements, etc. The memory medium may include other types of non-transitory memory as well or combinations thereof. In addition, the memory medium may be located in a first computer system in which the programs are executed, or may be located in a second different computer system which connects to the first computer system over a network, such as the Internet. In the latter instance, the second computer system may provide program instructions to the first computer for execution. The term “memory medium” may include two or more memory mediums which may reside in different locations, e.g., in different computer systems that are connected over a network. The memory medium may store program instructions (e.g., embodied as computer programs) that may be executed by one or more processors.

[0038] Carrier Medium - a memory medium as described above, as well as a physical transmission medium, such as a bus, network, and / or other physical transmission medium that conveys signals such as electrical, electromagnetic, or digital signals.

[0039] Programmable Hardware Element - includes various hardware devicescomprising multiple programmable function blocks connected via a programmable interconnect. Examples include FPGAs (Field Programmable Gate Arrays), PLDs (Programmable Logic Devices), FPOAs (Field Programmable Object Arrays), and CPLDs (Complex PLDs). The programmable function blocks may range from fine grained (combinatorial logic or look up tables) to coarse grained (arithmetic logic units or processor cores). A programmable hardware element may also be referred to as "reconfigurable logic”.

[0040] Computer System (or Computer) - any of various types of computing or processing systems, including a personal computer system (PC), mainframe computer system, workstation, network appliance, Internet appliance, personal digital assistant (PDA), television system, grid computing system, or other device or combinations of devices. In general, the term "computer system" can be broadly defined to encompass any device (or combination of devices) having at least one processor that executes instructions from a memory medium.

[0041] User Equipment (UE) (or “UE Device”) - any of various types of computer systems devices which are mobile or portable and which performs wireless communications. Examples of UE devices include mobile telephones or smart phones (e.g., iPhone™, Android™-based phones), portable gaming devices (e.g., Nintendo DS™, PlayStation Portable™, Gameboy Advance™, iPhone™), laptops, wearable devices (e.g., smart watch, smart glasses), PDAs, portable Internet devices, music players, data storage devices, other handheld devices, unmanned aerial vehicles (UAVs) (e.g., drones), UAV controllers (UACs), and so forth. In general, the term “UE” or “UE device” can be broadly defined to encompass any electronic, computing, and / or telecommunications device (or combination of devices) which is easily transported by a user and capable of wireless communication.

[0042] Base Station - The term "Base Station" has the full breadth of its ordinary meaning, and at least includes a wireless communication station installed at a fixed location and used to communicate as part of a wireless telephone system or radio system.

[0043] Processing Element (or Processor) - refers to various elements or combinations of elements that are capable of performing a function in a device, such as a user equipment or a cellular network device. Processing elements may include, for example: processors and associated memory, portions or circuits of individual processor cores, entire processor cores,processor arrays, circuits such as an ASIC (Application Specific Integrated Circuit), programmable hardware elements such as a field programmable gate array (FPGA), as well any of various combinations of the above.

[0044] Channel - a medium used to convey information from a sender (transmitter) to a receiver. It should be noted that since characteristics of the term “channel” may differ according to different wireless protocols, the term “channel” as used herein may be considered as being used in a manner that is consistent with the standard of the type of device with reference to which the term is used. In some standards, channel widths may be variable (e.g., depending on device capability, band conditions, etc.). For example, LTE may support scalable channel bandwidths from 1.4 MHz to 20MHz. In contrast, WLAN channels may be 22MHz wide while Bluetooth channels may be IMhz wide. Other protocols and standards may include different definitions of channels. Furthermore, some standards may define and use multiple types of channels, e.g., different channels for uplink or downlink and / or different channels for different uses such as data, control information, etc.

[0045] Band - The term "band" has the full breadth of its ordinary meaning, and at least includes a section of spectrum (e.g., radio frequency spectrum) in which channels are used or set aside for the same purpose.

[0046] Wi-Fi - The term "Wi-Fi" (or WiFi) has the full breadth of its ordinary meaning, and at least includes a wireless communication network or RAT that is serviced by wireless LAN (WLAN) access points and which provides connectivity through these access points to the Internet. Most modem Wi-Fi networks (or WLAN networks) are based on IEEE 802.11 standards and are marketed under the name “Wi-Fi”. A Wi-Fi (WLAN) network is different from a cellular network.

[0047] 3GPP Access - refers to accesses (e.g., radio access technologies) that are specified by the Third Generation Partnership Project (3GPP) standards. These accesses include, but are not limited to, GSM / GPRS, LTE, LTE-A, and / or 5G NR. In general, 3GPP access refers to various types of cellular access technologies.

[0048] Non-3GPP Access - refers any accesses (e.g., radio access technologies) that are not specified by 3GPP standards. These accesses include, but are not limited to, WiMAX, CDMA2000, Wi-Fi, WLAN, and / or fixed networks. Non-3GPP accesses may be split into two categories, "trusted" and "untrusted": Trusted non-3GPP accesses caninteract directly with an evolved packet core (EPC) and / or a 5G core (5GC) whereas untrusted non-3GPP accesses interwork with the EPC / 5GC via a network entity, such as an Evolved Packet Data Gateway and / or a 5G NR gateway. In general, non-3GPP access refers to various types on non-cellular access technologies.

[0049] Automatically - refers to an action or operation performed by a computer system (e.g., software executed by the computer system) or device (e.g., circuitry, programmable hardware elements, ASICs, etc.), without user input directly specifying or performing the action or operation. Thus, the term "automatically" is in contrast to an operation being manually performed or specified by the user, where the user provides input to directly perform the operation. An automatic procedure may be initiated by input provided by the user, but the subsequent actions that are performed “automatically” are not specified by the user, i.e., are not performed “manually”, where the user specifies each action to perform. For example, a user filling out an electronic form by selecting each field and providing input specifying information (e.g., by typing information, selecting check boxes, radio selections, etc.) is filling out the form manually, even though the computer system can update the form in response to the user actions. The form may be automatically filled out by the computer system where the computer system (e.g., software executing on the computer system) analyzes the fields of the form and fills in the form without any user input specifying the answers to the fields. As indicated above, the user may invoke the automatic filling of the form, but is not involved in the actual filling of the form (e.g., the user is not manually specifying answers to fields but rather they are being automatically completed). The present specification provides various examples of operations being automatically performed in response to actions the user has taken.

[0050] Approximately - refers to a value that is almost correct or exact. For example, approximately may refer to a value that is within 1 to 10 percent of the exact (or desired) value. It should be noted, however, that the actual threshold value (or tolerance) may be application dependent. For example, in some embodiments, “approximately” may mean within 0.1% of some specified or desired value, while in various other embodiments, the threshold may be, for example, 2%, 3%, 5%, and so forth, as desired or as used by the particular application.

[0051] Concurrent - refers to parallel execution or performance, where tasks, processes, or programs are performed in an at least partially overlapping manner. Forexample, concurrency may be implemented using “strong” or strict parallelism, where tasks are performed (at least partially) in parallel on respective computational elements, or using “weak parallelism”, where the tasks are performed in an interleaved manner, e.g., by time multiplexing of execution threads.

[0052] Various components may be described as “configured to” perform a task or tasks. Tn such contexts, “configured to” is a broad recitation generally meaning “having structure that” performs the task or tasks during operation. As such, the component can be configured to perform the task even when the component is not currently performing that task (e.g., a set of electrical conductors may be configured to electrically connect a module to another module, even when the two modules are not connected). In some contexts, “configured to” may be a broad recitation of structure generally meaning “having circuitry that” performs the task or tasks during operation. As such, the component can be configured to perform the task even when the component is not currently on. In general, the circuitry that forms the structure corresponding to “configured to” may include hardware circuits.

[0053] Various components may be described as performing a task or tasks, for convenience in the description. Such descriptions should be interpreted as including the phrase “configured to.” Reciting a component that is configured to perform one or more tasks is expressly intended not to invoke 35 U.S.C. § 112(f) interpretation for that component.Figures 1A and IB: Communication Systems

[0054] Figure 1A illustrates a simplified example wireless communication system, according to some embodiments. It is noted that the system of Figure 1A is merely one example of a possible system, and that features of this disclosure may be implemented in any of various systems, as desired.

[0055] As shown, the example wireless communication system includes a base station 102A which communicates over a transmission medium with one or more user devices 106A, 106B, etc., through 106N. The user devices may be referred to herein as a “user equipment” (UE). Thus, the user devices 106 are referred to as UEs or UE devices.

[0056] The base station (BS) 102A may be a base transceiver station (BTS) or cell site (a “cellular base station”) and may include hardware that enables wireless communicationwith the UEs 106A through 106N.

[0057] The communication area (or coverage area) of the base station may be referred to as a “cell.” The base station 102A and the UEs 106 may be configured to communicate over the transmission medium using any of various radio access technologies (RATs), also referred to as wireless communication technologies, or telecommunication standards, such as GSM, UMTS (associated with, for example, WCDMA or TD-SCDMA air interfaces), LTE, LTE-Advanced (LTE-A), 5G new radio (5G NR), HSPA, 3GPP2 CDMA2000 (e.g., IxRTT, IxEV-DO, HRPD, eHRPD), etc. Note that if the base station 102 A is implemented in the context of LTE (E-UTRAN), it may alternately be referred to as an 'eNodeB' or ‘eNB’. Note that if the base station 102A is implemented in the context of 5G NR, it may alternately be referred to as ‘gNodeB’ or ‘gNB’.

[0058] As shown, the base station 102 A may also be equipped to communicate with a network (NW) 100 (e.g., a core network of a cellular service provider, a telecommunication network such as a public switched telephone network (PSTN), and / or the Internet, among various possibilities). Thus, the base station 102A may facilitate communication between the user devices and / or between the user devices and the network 100. In particular, the cellular base station 102 A may provide UEs 106 with various telecommunication capabilities, such as voice, SMS and / or data services.

[0059] Base station 102 A and other similar base stations (such as base stations 102B...102N) operating according to the same or a different cellular communication standard may thus be provided as a network of cells, which may provide continuous or nearly continuous overlapping service to UEs 106A-N and similar devices over a geographic area via one or more cellular communication standards.

[0060] Thus, while base station 102A may act as a “serving cell” for UEs 106A-N as illustrated in Figure 1A, each UE 106 may also be capable of receiving signals from (and possibly within communication range of) one or more other cells (which might be provided by base stations 102B-N and / or any other base stations), which may be referred to as “neighboring cells”. Such cells may also be capable of facilitating communication between user devices and / or between user devices and the network 100. Such cells may include “macro” cells, “micro” cells, “pico” cells, and / or cells which provide any of various other granularities of service area size. For example, base stations 102A-B illustrated in Figure 1A might be macro cells, while base station 102N might be a micro cell. Otherconfigurations are also possible.

[0061] In some embodiments, base station 102A may be a next generation base station, e.g., a 5G New Radio (5G NR) base station, or “gNB”. In some embodiments, a gNB may be connected to a legacy evolved packet core (EPC) network and / or to a NR core (NRC) network. In addition, a gNB cell may include one or more transition and reception points (TRPs). In addition, a UE capable of operating according to 5G NR may be connected to one or more TRPs within one or more gNBs.

[0062] Note that a UE 106 may be capable of communicating using multiple wireless communication standards. For example, the UE 106 may be configured to communicate using a wireless networking (e.g., Wi-Fi) and / or peer-to-peer wireless communication protocol (e.g., Bluetooth, Wi-Fi peer-to-peer, etc.) in addition to at least one cellular communication protocol (e.g., GSM, UMTS (associated with, for example, WCDMA or TD-SCDMA air interfaces), LTE, LTE-A, 5G NR, HSPA, 3GPP2 CDMA2000 (e.g., IxRTT, IxEV-DO, HRPD, eHRPD), etc.). The UE 106 may also or alternatively be configured to communicate using one or more global navigational satellite systems (GNSS, e.g., GPS or GLONASS), one or more mobile television broadcasting standards (e.g., ATSC-M / H or DVB-H), and / or any other wireless communication protocol, if desired. Other combinations of wireless communication standards (including more than two wireless communication standards) are also possible.

[0063] Figure IB illustrates user equipment 106 (e.g., one of the devices 106A through 106N) in communication with a base station 102 and an access point 112, according to some embodiments. The UE 106 may be a device with both cellular communication capability and non-cellular communication capability (e.g., Bluetooth, Wi-Fi, and so forth) such as a mobile phone, a hand- held device, a computer or a tablet, or virtually any type of wireless device.

[0064] The UE 106 may include a processor that is configured to execute program instructions stored in memory. The UE 106 may perform any of the method embodiments described herein by executing such stored instructions. Alternatively, or in addition, the UE 106 may include a programmable hardware element such as an FPGA (field -programmable gate array) that is configured to perform any of the method embodiments described herein, or any portion of any of the method embodiments described herein.

[0065] The UE 106 may include one or more antennas for communicating using oneor more wireless communication protocols or technologies. In some embodiments, the UE 106 may be configured to communicate using, for example, CDMA2000 (IxRTT I IxEV- DO / HRPD I eHRPD), LTE / LTE- Advanced, or 5G NR using a single shared radio and / or GSM, LTE, LTE- Advanced, or 5G NR using the single shared radio. The shared radio may couple to a single antenna, or may couple to multiple antennas (e.g., for MIMO) for performing wireless communications. In general, a radio may include any combination of a baseband processor, analog RF signal processing circuitry (e.g., including filters, mixers, oscillators, amplifiers, etc.), or digital processing circuitry (e.g., for digital modulation as well as other digital processing). Similarly, the radio may implement one or more receive and transmit chains using the aforementioned hardware. For example, the UE 106 may share one or more parts of a receive and / or transmit chain between multiple wireless communication technologies, such as those discussed above.

[0066] In some embodiments, the UE 106 may include separate transmit and / or receive chains (e.g., including separate antennas and other radio components) for each wireless communication protocol with which it is configured to communicate. As a further possibility, the UE 106 may include one or more radios which are shared between multiple wireless communication protocols, and one or more radios which are used exclusively by a single wireless communication protocol. For example, the UE 106 might include a shared radio for communicating using either of LTE (E-UTRAN) or 5G NR (or LTE or 1 xRTTor LTE or GSM), and separate radios for communicating using each of Wi-Fi and Bluetooth. Other configurations are also possible.Figure 2: Block Diagram of a Base Station

[0067] Figure 2 illustrates an example block diagram of a base station 102, according to some embodiments. It is noted that the base station of Figure 3 is merely one example of a possible base station. As shown, the base station 102 may include processor(s) 204 which may execute program instructions for the base station 102. The processor(s) 204 may also be coupled to memory management unit (MMU) 240, which may be configured to receive addresses from the processor(s) 204 and translate those addresses to locations in memory (e.g., memory 260 and read only memory (ROM) 250) or to other circuits or devices.

[0068] The base station 102 may include at least one network port 270. The network port270 may be configured to couple to a telephone network and provide a plurality of devices, such as UE devices 106, access to the telephone network as described above in Figures 1 and 2.

[0069] The network port 270 (or an additional network port) may also or alternatively be configured to couple to a cellular network, e.g., a core network of a cellular service provider. The core network may provide mobility related services and / or other services to a plurality of devices, such as UE devices 106. In some cases, the network port 270 may couple to a telephone network via the core network, and / or the core network may provide a telephone network (e.g., among other UE devices serviced by the cellular service provider).

[0070] In some embodiments, base station 102 may be a next generation base station, e.g., a 5G New Radio (5G NR) base station, or “gNB”. In such embodiments, base station 102 may be connected to a legacy evolved packet core (EPC) network and / or to a NR core (NRC) network. In addition, base station 102 may be considered a 5G NR cell and may include one or more transition and reception points (TRPs). In addition, a UE capable of operating according to 5G NR may be connected to one or more TRPs within one or more gNBs.

[0071] The base station 102 may include at least one antenna 234, and possibly multiple antennas. The at least one antenna 234 may be configured to operate as a wireless transceiver and may be further configured to communicate with UE devices 106 via radio 230. The antenna 234 communicates with the radio 230 via communication chain 232. Communication chain 232 may be a receive chain, a transmit chain or both. The radio 230 may be configured to communicate via various wireless communication standards, including, but not limited to, 5G NR, LTE, LTE-A, GSM, UMTS, CDMA2000, Wi-Fi, etc.

[0072] The base station 102 may be configured to communicate wirelessly using multiple wireless communication standards. In some instances, the base station 102 may include multiple radios, which may enable the base station 102 to communicate according to multiple wireless communication technologies. For example, as one possibility, the base station 102 may include an LTE radio for performing communication according to LTE as well as a 5G NR radio for performing communication according to 5G NR. In such a case, the base station 102 may be capable of operating as both an LTE base station and a 5G NR base station. As another possibility, the base station 102 may include a multi-mode radio which is capable of performing communications according to any of multiple wirelesscommunication technologies (e.g., 5G NR and Wi-Fi, LTE and Wi-Fi, LTE and UMTS, LTE and CDMA2000, UMTS and GSM, etc.).

[0073] As described further subsequently herein, the BS 102 may include hardware and software components for implementing or supporting implementation of features described herein. The processor 204 of the base station 102 may be configured to implement or support implementation of part or all of the methods described herein, e.g., by executing program instructions stored on a memory medium (e.g., a non-transitory computer-readable memory medium). Alternatively, the processor 204 may be configured as a programmable hardware element, such as an FPGA (Field Programmable Gate Array), or as an ASIC (Application Specific Integrated Circuit), or a combination thereof. Alternatively (or in addition) the processor 204 of the BS 102, in conjunction with one or more of the other components 230, 232, 234, 240, 250, 260, 270 may be configured to implement or support implementation of part or all of the features described herein.

[0074] In addition, as described herein, processor(s) 204 may be comprised of one or more processing elements. In other words, one or more processing elements may be included in processor(s) 204. Thus, processor(s) 204 may include one or more integrated circuits (ICs) that are configured to perform the functions of processor(s) 204. In addition, each integrated circuit may include circuitry (e.g., first circuitry, second circuitry, etc.) configured to perform the functions of processor(s) 204.

[0075] Further, as described herein, radio 230 may be comprised of one or more processing elements. In other words, one or more processing elements may be included in radio 230. Thus, radio 230 may include one or more integrated circuits (ICs) that are configured to perform the functions of radio 230. In addition, each integrated circuit may include circuitry (e.g., first circuitry, second circuitry, etc.) configured to perform the functions of radio 230.Figure 3 : Block Diagram of a Server

[0076] Figure 3 illustrates an example block diagram of a server 104, according to some embodiments. It is noted that the server of Figure 3 is merely one example of a possible server. As shown, the server 104 may include processor(s) 344 which may execute program instructions for the server 104. The processor(s) 344 may also be coupled tomemory management unit (MMU) 374, which may be configured to receive addresses from the processor(s) 344 and translate those addresses to locations in memory (e.g., memory 364 and read only memory (ROM) 354) or to other circuits or devices.

[0077] The server 104 may be configured to provide a plurality of devices, such as base station 102 and UE devices 106 access to network functions, e.g., as further described herein.

[0078] In some embodiments, the server 104 may be part of a radio access network, such as a 5G New Radio (5G NR) radio access network. In some embodiments, the server 104 may be connected to a legacy evolved packet core (EPC) network and / or to a NR core (NRC) network.

[0079] As described further subsequently herein, the server 104 may include hardware and software components for implementing or supporting implementation of features described herein. The processor 344 of the server 104 may be configured to implement or support implementation of part or all of the methods described herein, e.g., by executing program instructions stored on a memory medium (e.g., a non-transitory computer-readable memory medium). Alternatively, the processor 344 may be configured as a programmable hardware element, such as an FPGA (Field Programmable Gate Array), or as an ASIC (Application Specific Integrated Circuit), or a combination thereof. Alternatively (or in addition) the processor 344 of the server 104, in conjunction with one or more of the other components 354, 364, and / or 374 may be configured to implement or support implementation of part or all of the features described herein.

[0080] In addition, as described herein, processor(s) 344 may be comprised of one or more processing elements. In other words, one or more processing elements may be included in processor(s) 344. Thus, processor(s) 344 may include one or more integrated circuits (ICs) that are configured to perform the functions of processor(s) 344. In addition, each integrated circuit may include circuitry (e.g., first circuitry, second circuitry, etc.) configured to perform the functions of processor(s) 344.Figure 4: Block Diagram of a UE

[0081] Figure 4 illustrates an example simplified block diagram of a communication device 106, according to some embodiments. It is noted that the block diagram of thecommunication device of Figure 4 is only one example of a possible communication device. According to embodiments, communication device 106 may be a user equipment (UE) device, a mobile device or mobile station, a wireless device or wireless station, a desktop computer or computing device, a mobile computing device (e.g., a laptop, notebook, or portable computing device), a tablet, an unmanned aerial vehicle (UAV), a UAV controller (UAC) and / or a combination of devices, among other devices. As shown, the communication device 106 may include a set of components 400 configured to perform core functions. For example, this set of components may be implemented as a system on chip (SOC), which may include portions for various purposes. Alternatively, this set of components 400 may be implemented as separate components or groups of components for the various purposes. The set of components 400 may be coupled (e.g., communicatively; directly or indirectly) to various other circuits of the communication device 106.

[0082] For example, the communication device 106 may include various types of memory (e.g., including NAND flash 410), an input / output interface such as connector VF 420 (e.g., for connecting to a computer system; dock; charging station; input devices, such as a microphone, camera, keyboard; output devices, such as speakers; etc.), the display 460, which may be integrated with or external to the communication device 106, and cellular communication circuitry 430 such as for 5G NR, LTE, GSM, etc., and short to medium range wireless communication circuitry 429 (e.g., Bluetooth™ and WLAN circuitry). In some embodiments, communication device 106 may include wired communication circuitry (not shown), such as a network interface card, e.g., for Ethernet.

[0083] The cellular communication circuitry 430 may couple (e.g., communicatively; directly or indirectly) to one or more antennas, such as antennas 435 and 436 as shown. The short to medium range wireless communication circuitry 429 may also couple (e.g., communicatively; directly or indirectly) to one or more antennas, such as antennas 437 and 438 as shown. Alternatively, the short to medium range wireless communication circuitry 429 may couple (e.g., communicatively; directly or indirectly) to the antennas 435 and 436 in addition to, or instead of, coupling (e.g., communicatively; directly or indirectly) to the antennas 437 and 438. The short to medium range wireless communication circuitry 429 and / or cellular communication circuitry 430 may include multiple receive chains and / or multiple transmit chains for receiving and / or transmitting multiple spatial streams, such as in a multiple-input multiple output (MIMO) configuration.

[0084] In some embodiments, as further described below, cellular communication circuitry 430 may include dedicated receive chains (including and / or coupled to, e.g., communicatively; directly or indirectly, dedicated processors and / or radios) for multiple RATs (e.g., a first receive chain for LTE and a second receive chain for 5G NR). In addition, in some embodiments, cellular communication circuitry 430 may include a single transmit chain that may be switched between radios dedicated to specific RATs. For example, a first radio may be dedicated to a first RAT, e.g., LTE, and may be in communication with a dedicated receive chain and a transmit chain shared with an additional radio, e.g., a second radio that may be dedicated to a second RAT, e.g., 5G NR, and may be in communication with a dedicated receive chain and the shared transmit chain.

[0085] The communication device 106 may also include and / or be configured for use with one or more user interface elements. The user interface elements may include any of various elements, such as display 460 (which may be a touchscreen display), a keyboard (which may be a discrete keyboard or may be implemented as part of a touchscreen display), a mouse, a microphone and / or speakers, one or more cameras, one or more buttons, and / or any of various other elements capable of providing information to a user and / or receiving or interpreting user input.

[0086] The communication device 106 may further include one or more smart cards 445 that include SIM (Subscriber Identity Module) functionality, such as one or more UICC(s) (Universal Integrated Circuit Card(s)) cards 445. Note that the term “SIM” or “SIM entity” is intended to include any of various types of SIM implementations or SIM functionality, such as the one or more UICC(s) cards 445, one or more eUICCs, one or more eSIMs, either removable or embedded, etc. In some embodiments, the UE 106 may include at least two SIMs. Each SIM may execute one or more SIM applications and / or otherwise implement SIM functionality. Thus, each SIM may be a single smart card that may be embedded, e.g., may be soldered onto a circuit board in the UE 106, or each SIM 410 may be implemented as a removable smart card. Thus, the SIM(s) may be one or more removable smart cards (such as UICC cards, which are sometimes referred to as “SIM cards”), and / or the SIMs 410 may be one or more embedded cards (such as embedded UICCs (eUICCs), which are sometimes referred to as “eSIMs” or “eSIM cards”). In some embodiments (such as when the SIM(s) include an eUICC), one or more of the SIM(s) may implement embedded SIM (eSIM) functionality; in such an embodiment, a single one of the SIM(s) may execute multiple SIM applications. Each of the SIMs may include components such as a processorand / or a memory; instructions for performing SIM / eSIM functionality may be stored in the memory and executed by the processor. In some embodiments, the UE 106 may include a combination of removable smart cards and fixed / non-removable smart cards (such as one or more eUICC cards that implement eSIM functionality), as desired. For example, the UE 106 may comprise two embedded SIMs, two removable SIMs, or a combination of one embedded SIMs and one removable SIMs. Various other SIM configurations are also contemplated.

[0087] As noted above, in some embodiments, the UE 106 may include two or more SIMs. The inclusion of two or more SIMs in the UE 106 may allow the UE 106 to support two different telephone numbers and may allow the UE 106 to communicate on corresponding two or more respective networks. For example, a first SIM may support a first RAT such as LTE, and a second SIM 410 support a second RAT such as 5G NR. Other implementations and RATs are of course possible. In some embodiments, when the UE 106 comprises two SIMs, the UE 106 may support Dual SIM Dual Active (DSDA) functionality. The DSDA functionality may allow the UE 106 to be simultaneously connected to two networks (and use two different RATs) at the same time, or to simultaneously maintain two connections supported by two different SIMs using the same or different RATs on the same or different networks. The DSDA functionality may also allow the UE 106 to simultaneously receive voice calls or data traffic on either phone number. In certain embodiments the voice call may be a packet switched communication. In other words, the voice call may be received using voice over LTE (VoLTE) technology and / or voice over NR (VoNR) technology. In some embodiments, the UE 106 may support Dual SIM Dual Standby (DSDS) functionality. The DSDS functionality may allow either of the two SIMs in the UE 106 to be on standby waiting for a voice call and / or data connection. In DSDS, when a call / data is established on one SIM, the other SIM is no longer active. In some embodiments, DSDx functionality (either DSDA or DSDS functionality) may be implemented with a single SIM (e.g., a eUICC) that executes multiple SIM applications for different carriers and / or RATs.

[0088] As shown, the SOC 400 may include processor(s) 402, which may execute program instructions for the communication device 106 and display circuitry 404, which may perform graphics processing and provide display signals to the display 460. The processor(s) 402 may also be coupled to memory management unit (MMU) 440, which may be configured to receive addresses from the processor(s) 402 and translate those addressesto locations in memory (e.g., memory 406, read only memory (ROM) 450, NAND flash memory 410) and / or to other circuits or devices, such as the display circuitry 404, short to medium range wireless communication circuitry 429, cellular communication circuitry 430, connector I / F 420, and / or display 460. The MMU 440 may be configured to perform memory protection and page table translation or set up. In some embodiments, the MMU 440 may be included as a portion of the processor(s) 402.

[0089] As noted above, the communication device 106 may be configured to communicate using wireless and / or wired communication circuitry. The communication device 106 may be configured to perform methods for Al based CSI feedback with CSI prediction, including systems, methods, and mechanisms for a UE to indicate a predicted CSI report, network configuration of CSI feedback, UE PMI report format, and Al model life cycle management, e.g., in 5G NR systems and beyond, as further described herein.

[0090] As described herein, the communication device 106 may include hardware and software components for implementing the above features for a communication device 106 to communicate a scheduling profile for power savings to a network. The processor 402 of the communication device 106 may be configured to implement part or all of the features described herein, e.g., by executing program instructions stored on a memory medium (e.g., a non-transitory computer readable memory medium). Alternatively (or in addition), processor 402 may be configured as a programmable hardware element, such as an FPGA (Field Programmable Gate Array), or as an ASIC (Application Specific Integrated Circuit). Alternatively (or in addition) the processor 402 of the communication device 106, in conjunction with one or more of the other components 400, 404, 406, 410, 420, 429, 430, 440, 445, 450, 460 may be configured to implement part or all of the features described herein.

[0091] In addition, as described herein, processor 402 may include one or more processing elements. Thus, processor 402 may include one or more integrated circuits (ICs) that are configured to perform the functions of processor 402. In addition, each integrated circuit may include circuitry (e.g., first circuitry, second circuitry, etc.) configured to perform the functions of processor(s) 402.

[0092] Further, as described herein, cellular communication circuitry 430 and short to medium range wireless communication circuitry 429 may each include one or more processing elements. In other words, one or more processing elements may be included incellular communication circuitry 430 and, similarly, one or more processing elements may be included in short to medium range wireless communication circuitry 429. Thus, cellular communication circuitry 430 may include one or more integrated circuits (ICs) that are configured to perform the functions of cellular communication circuitry 430. In addition, each integrated circuit may include circuitry (e.g., first circuitry, second circuitry, etc.) configured to perform the functions of cellular communication circuitry 430. Similarly, the short to medium range wireless communication circuitry 429 may include one or more ICs that are configured to perform the functions of short to medium range wireless communication circuitry 429. In addition, each integrated circuit may include circuitry (e.g., first circuitry, second circuitry, etc.) configured to perform the functions of short to medium range wireless communication circuitry 429.Figure 5: Block Diagram of Cellular Communication Circuitry

[0093] Figure 5 illustrates an example simplified block diagram of cellular communication circuitry, according to some embodiments. It is noted that the block diagram of the cellular communication circuitry of Figure 5 is only one example of a possible cellular communication circuit. According to embodiments, cellular communication circuitry 530, which may be cellular communication circuitry 430, may be included in a communication device, such as communication device 106 described above. As noted above, communication device 106 may be a user equipment (UE) device, a mobile device or mobile station, a wireless device or wireless station, a desktop computer or computing device, a mobile computing device (e.g., a laptop, notebook, or portable computing device), a tablet and / or a combination of devices, among other devices.

[0094] The cellular communication circuitry 530 may couple (e.g., communicatively; directly or indirectly) to one or more antennas, such as antennas 435a-b and 436 as shown (in Figure 4). In some embodiments, cellular communication circuitry 530 may include dedicated receive chains (including and / or coupled to, e.g., communicatively; directly or indirectly, dedicated processors and / or radios) for multiple RATs (e.g., a first receive chain for LTE and a second receive chain for 5G NR). For example, as shown in Figure 5, cellular communication circuitry 530 may include a modem 510 and a modem 520. Modem 510 may be configured for communications according to a first RAT, e.g., such as LTE or LTE- A, and modem 520 may be configured for communications according to a second RAT,e.g., such as 5G NR.

[0095] As shown, modem 510 may include one or more processors 512 and a memory 516 in communication with processors 512. Modem 510 may be in communication with a radio frequency (RF) front end 530. RF front end 530 may include circuitry for transmitting and receiving radio signals. For example, RF front end 530 may include receive circuitry (RX) 532 and transmit circuitry (TX) 534. In some embodiments, receive circuitry 532 may be in communication with downlink (DL) front end 550, which may include circuitry for receiving radio signals via antenna 335a.

[0096] Similarly, modem 520 may include one or more processors 522 and a memory 526 in communication with processors 522. Modem 520 may be in communication with an RF front end 540. RF front end 540 may include circuitry for transmitting and receiving radio signals. For example, RF front end 540 may include receive circuitry 542 and transmit circuitry 544. In some embodiments, receive circuitry 542 may be in communication with DL front end 560, which may include circuitry for receiving radio signals via antenna 335b.

[0097] In some embodiments, a switch 570 may couple transmit circuitry 534 to uplink (UL) front end 572. In addition, switch 570 may couple transmit circuitry 544 to UL front end 572. UL front end 572 may include circuitry for transmitting radio signals via antenna 336. Thus, when cellular communication circuitry 530 receives instructions to transmit according to the first RAT (e.g., as supported via modem 510), switch 570 may be switched to a first state that allows modem 510 to transmit signals according to the first RAT (e.g., via a transmit chain that includes transmit circuitry 534 and UL front end 572). Similarly, when cellular communication circuitry 530 receives instructions to transmit according to the second RAT (e.g., as supported via modem 520), switch 570 may be switched to a second state that allows modem 520 to transmit signals according to the second RAT (e.g., via a transmit chain that includes transmit circuitry 544 and UL front end 572).

[0098] In some embodiments, the cellular communication circuitry 530 may be configured to perform methods for Al based CSI feedback with CSI prediction, including systems, methods, and mechanisms for a UE to indicate a predicted CSI report, network configuration of CSI feedback, UE PMI report format, and Al model life cycle management, e.g., in 5G NR systems and beyond, as further described herein.

[0099] As described herein, the modem 510 may include hardware and software components for implementing the above features or for time division multiplexing UL datafor NSA NR operations, as well as the various other techniques described herein. The processors 512 may be configured to implement part or all of the features described herein, e.g., by executing program instructions stored on a memory medium (e.g., a non-transitory computer-readable memory medium). Alternatively (or in addition), processor 512 may be configured as a programmable hardware element, such as an FPGA (Field Programmable Gate Array), or as an ASIC (Application Specific Integrated Circuit). Alternatively (or in addition) the processor 512, in conjunction with one or more of the other components 530, 532, 534, 550, 570, 572, 335 and 336 may be configured to implement part or all of the features described herein.

[0100] In addition, as described herein, processors 512 may include one or more processing elements. Thus, processors 512 may include one or more integrated circuits (ICs) that are configured to perform the functions of processors 512. In addition, each integrated circuit may include circuitry (e.g., first circuitry, second circuitry, etc.) configured to perform the functions of processors 512.

[0101] As described herein, the modem 520 may include hardware and software components for implementing the above features for Al based CSI feedback with CSI prediction, including systems, methods, and mechanisms for a UE to indicate a predicted CSI report, network configuration of CSI feedback, UE PMI report format, and Al model life cycle management, e.g., in 5G NR systems and beyond, as well as the various other techniques described herein. The processors 522 may be configured to implement part or all of the features described herein, e.g., by executing program instructions stored on a memory medium (e.g., a non-transitory computer- readable memory medium). Alternatively (or in addition), processor 522 may be configured as a programmable hardware element, such as an FPGA (Field Programmable Gate Array), or as an ASIC (Application Specific Integrated Circuit). Alternatively (or in addition) the processor 522, in conjunction with one or more of the other components 540, 542, 544, 550, 570, 572, 335 and 336 may be configured to implement part or all of the features described herein.

[0102] In addition, as described herein, processors 522 may include one or more processing elements. Thus, processors 522 may include one or more integrated circuits (ICs) that are configured to perform the functions of processors 522. In addition, each integrated circuit may include circuitry (e.g., first circuitry, second circuitry, etc.) configured to perform the functions of processors 522.Figures 6 A, 6B and 7: 5G Core Network Architecture - Interworking with Wi-Fi

[0103] In some embodiments, the 5G core network (CN) may be accessed via (or through) a cellular connection / interface (e.g., via a 3GPP communication architecture / protocol) and a non- cellular connection / interface (e.g., a non-3GPP access architecture / protocol such as Wi-Fi connection). Figure 6 A illustrates an example of a 5G network architecture that incorporates both 3GPP (e.g., cellular) and non-3GPP (e.g., non- cellular) access to the 5G CN, according to some embodiments. As shown, a user equipment device (e.g., such as UE 106) may access the 5G CN through both a radio access network (RAN, e.g., such as gNB 604, which may be a base station 102) and an access point, such as AP 612. The AP 612 may include a connection to the Internet 600 as well as a connection to a non-3GPP inter-working function (N3IWF) 603 network entity. The N3IWF may include a connection to a core access and mobility management function (AMF) 605 of the 5G CN. The AMF 605 may include an instance of a 5G mobility management (5G MM) function associated with the UE 106. In addition, the RAN (e.g., gNB 604) may also have a connection to the AMF 605. Thus, the 5G CN may support unified authentication over both connections as well as allow simultaneous registration for UE 106 access via both gNB 604 and AP 612. As shown, the AMF 605 may include one or more functional entities associated with the 5G CN (e.g., network slice selection function (NSSF) 620, short message service function (SMSF) 622, application function (AF) 624, unified data management (UDM) 626, policy control function (PCF) 628, and / or authentication server function (AUSF) 630). Note that these functional entities may also be supported by a session management function (SMF) 606a and an SMF 606b of the 5G CN. The AMF 605 may be connected to (or in communication with) the SMF 606a. Further, the gNB 604 may in communication with (or connected to) a user plane function (UPF) 608a that may also be communication with the SMF 606a. Similarly, the N3IWF 603 may be communicating with a UPF 608b that may also be communicating with the SMF 606b. Both UPFs may be communicating with the data network (e.g., DN 610a and 610b) and / or the Internet 600 and Internet Protocol (IP) Multimedia Subsystem / IP Multimedia Core Network Subsystem (IMS) core network 610.

[0104] Figure 6B illustrates an example of a 5G network architecture that incorporates both dual 3GPP (e.g., LTE and 5G NR) access and non-3GPP access to the 5G CN,according to some embodiments. As shown, a user equipment device (e.g., such as UE 106) may access the 5G CN through both a radio access network (RAN, e.g., such as gNB 604 or eNB 602, which may be a base station 102) and an access point, such as AP 612. The AP 612 may include a connection to the Internet 600 as well as a connection to the N3IWF 603 network entity. The N3IWF may include a connection to the AMF 605 of the 5G CN. The AMF 605 may include an instance of the 5G MM function associated with the UE 106. In addition, the RAN (e.g., gNB 604) may also have a connection to the AMF 605. Thus, the 5G CN may support unified authentication over both connections as well as allow simultaneous registration for UE 106 access via both gNB 604 and AP 612. In addition, the 5G CN may support dual-registration of the UE on both a legacy network (e.g., LTE via eNB 602) and a 5G network (e.g., via gNB 604). As shown, the eNB 602 may have connections to a mobility management entity (MME) 642 and a serving gateway (SGW) 644. The MME 642 may have connections to both the SGW 644 and the AMF 605. In addition, the SGW 644 may have connections to both the SMF 606a and the UPF 608a. As shown, the AMF 605 may include one or more functional entities associated with the 5G CN (e.g., NSSF 620, SMSF 622, AF 624, UDM 626, PCF 628, and / or AUSF 630). Note that UDM 626 may also include a home subscriber server (HSS) function and the PCF may also include a policy and charging rules function (PCRF). Note further that these functional entities may also be supported by the SMF606a and the SMF 606b of the 5G CN. The AMF 605 may be connected to (or in communication with) the SMF 606a. Further, the gNB 604 may in communication with (or connected to) the UPF 608a that may also be communication with the SMF 606a. Similarly, the N3IWF 603 may be communicating with a UPF 608b that may also be communicating with the SMF 606b. Both UPFs may be communicating with the data network (e.g., DN 610a and 610b) and / or the Internet 600 and IMS core network 610.

[0105] Note that in various embodiments, one or more of the above-described network entities may be configured to perform methods for Al based CSI feedback with CSI prediction, including systems, methods, and mechanisms for a UE to indicate a predicted CSI report, network configuration of CSI feedback, UE PMI report format, and Al model life cycle management, e.g., in 5G NR systems and beyond, e.g., as further described herein.

[0106] Figure 7 illustrates an example of a baseband processor architecture for a UE (e.g., such as UE 106), according to some embodiments. The baseband processorarchitecture 700 described in Figure 7 may be implemented on one or more radios (e.g., radios 429 and / or 430 described above) or modems (e.g., modems 510 and / or 520) as described above. As shown, the non-access stratum (NAS) 710 may include a 5G NAS 720 and a legacy NAS 750. The legacy NAS 750 may include a communication connection with a legacy access stratum (AS) 770. The 5G NAS 720 may include communication connections with both a 5G AS 740 and a non-3GPP AS 730 and Wi-Fi AS 732. The 5G NAS 720 may include functional entities associated with both access stratums. Thus, the 5G NAS 720 may include multiple 5G MM entities 726 and 728 and 5G session management (SM) entities 722 and 724. The legacy NAS 750 may include functional entities such as short message service (SMS) entity 752, evolved packet system (EPS) session management (ESM) entity 754, session management (SM) entity 756, EPS mobility management (EMM) entity 758, and mobility management (MM) / GPRS mobility management (GMM) entity 760. In addition, the legacy AS 770 may include functional entities such as LTE AS 772, UMTS AS 774, and / or GSM / GPRS AS 776.

[0107] Thus, the baseband processor architecture 700 allows for a common 5G-NAS for both 5G cellular and non-cellular (e.g., non-3GPP access). The baseband processor architecture 700 can be in communication with one or more UICC(s) 745. Note that as shown, the 5G MM may maintain individual connection management and registration management state machines for each connection. Additionally, a device (e.g., UE 106) may register to a single PLMN (e.g., 5G CN) using 5G cellular access as well as non-cellular access. Further, it may be possible for the device to be in a connected state in one access and an idle state in another access and vice versa. Finally, there may be common 5G-MM procedures (e.g., registration, de-registration, identification, authentication, as so forth) for both accesses.

[0108] Note that in various embodiments, one or more of the above-described functional entities of the 5G NAS and / or 5G AS may be configured to perform methods for Al based CSI feedback with CSI prediction, including systems, methods, and mechanisms for a UE to indicate a predicted CSI report, network configuration of CSI feedback, UE PMI report format, and Al model life cycle management, e.g., in 5G NR systems and beyond, e.g., as further described herein.

[0109] FIG. 8 illustrates example components of a device 800 in accordance with some embodiments. In some embodiments, the device 800 may include application circuitry 802,baseband circuitry 804, Radio Frequency (RF) circuitry 806, front-end module (FEM) circuitry 808, one or more antennas 810, and power management circuitry (PMC) 812 coupled together at least as shown. The components of the illustrated device 800 may be included in a UE or a RAN node. In some embodiments, the device 800 may include less elements (e.g., a RAN node may not utilize application circuitry 802, and instead include a processor / controller to process IP data received from an EPC). In some embodiments, the device 800 may include additional elements such as, for example, memory / storage, display, camera, sensor, or input / output (I / O) interface. In other embodiments, the components described below may be included in more than one device (e.g., said circuitries may be separately included in more than one device for Cloud-RAN (C-RAN) implementations).

[0110] The application circuitry 802 may include one or more application processors. For example, the application circuitry 802 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. The processor(s) may include any combination of general-purpose processors and dedicated processors (e.g., graphics processors, application processors, etc.). The processors may be coupled with or may include memory / storage and may be configured to execute instructions stored in the memory / storage to enable various applications or operating systems to run on the device 800. In some embodiments, processors of application circuitry 802 may process IP data packets received from an EPC.

[0111] The baseband circuitry 804 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. The baseband circuitry 804 may include one or more baseband processors or control logic to process baseband signals received from a receive signal path of the RF circuitry 806 and to generate baseband signals for a transmit signal path of the RF circuitry 806. Baseband processing circuity 804 may interface with the application circuitry 802 for generation and processing of the baseband signals and for controlling operations of the RF circuitry 806. For example, in some embodiments, the baseband circuitry 804 may include a third generation (3G) baseband processor 804A, a fourth generation (4G) baseband processor 804B, a fifth generation (5G) baseband processor 804C, or other baseband processor(s) 804D for other existing generations, generations in development or to be developed in the future (e.g., second generation (2G), si8h generation (6G), etc.). The baseband circuitry 804 (e.g., one or more of baseband processors 804A-D) may handle various radio control functions that enable communication with one or more radio networks via the RF circuitry 806. In other embodiments, some or all of thefunctionality of baseband processors 804A-D may be included in modules stored in the memory 804G and executed via a Central Processing Unit (CPU) 804E. The radio control functions may include, but are not limited to, signal modulation / demodulation, encoding / decoding, radio frequency shifting, etc. In some embodiments, modulation / demodulation circuitry of the baseband circuitry 804 may include Fast-Fourier Transform (FFT), precoding, or constellation mapping / demapping functionality. In some embodiments, encoding / decoding circuitry of the baseband circuitry 804 may include convolution, tail-biting convolution, turbo, Viterbi, or Low Density Parity Check (LDPC) encoder / decoder functionality. Embodiments of modulation / demodulation and encoder / decoder functionality are not limited to these examples and may include other suitable functionality in other embodiments.

[0112] In some embodiments, the baseband circuitry 804 may include one or more audio digital signal processor(s) (DSP) 804F. The audio DSP(s) 804F may be include elements for compression / decompression and echo cancellation and may include other suitable processing elements in other embodiments. Components of the baseband circuitry may be suitably combined in a single chip, a single chipset, or disposed on a same circuit board in some embodiments. In some embodiments, some or all of the constituent components of the baseband circuitry 804 and the application circuitry 802 may be implemented together such as, for example, on a system on a chip (SOC).

[0113] In some embodiments, the baseband circuitry 804 may provide for communication compatible with one or more radio technologies. For example, in some embodiments, the baseband circuitry 804 may support communication with an evolved universal terrestrial radio access network (EUTRAN) or other wireless metropolitan area networks (WMAN), a wireless local area network (WLAN), a wireless personal area network (WPAN). Embodiments in which the baseband circuitry 804 is configured to support radio communications of more than one wireless protocol may be referred to as multi-mode baseband circuitry.

[0114] RF circuitry 806 may enable communication with wireless networks using modulated electromagnetic radiation through a non- solid medium. In various embodiments, the RF circuitry 806 may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network. RF circuitry 806 may include a receive signal path which may include circuitry to down-convert RF signals received from the FEMcircuitry 808 and provide baseband signals to the baseband circuitry 804. RF circuitry 806 may also include a transmit signal path which may include circuitry to up-convert baseband signals provided by the baseband circuitry 804 and provide RF output signals to the FEM circuitry 808 for transmission.

[0115] In some embodiments, the receive signal path of the RF circuitry 806 may include mixer circuitry 806a, amplifier circuitry 806b and filter circuitry 806c. Tn some embodiments, the transmit signal path of the RF circuitry 806 may include filter circuitry 806c and mixer circuitry 806a. RF circuitry 806 may also include synthesizer circuitry 806d for synthesizing a frequency for use by the mixer circuitry 806a of the receive signal path and the transmit signal path. In some embodiments, the mixer circuitry 806a of the receive signal path may be configured to down-convert RF signals received from the FEM circuitry 808 based on the synthesized frequency provided by synthesizer circuitry 806d. The amplifier circuitry 806b may be configured to amplify the down-converted signals and the filter circuitry 806c may be a low-pass filter (LPF) or band-pass filter (BPF) configured to remove unwanted signals from the down-converted signals to generate output baseband signals. Output baseband signals may be provided to the baseband circuitry 804 for further processing. In some embodiments, the output baseband signals may be zero-frequency baseband signals, although this is not a requirement. In some embodiments, mixer circuitry 806a of the receive signal path may comprise passive mixers, although the scope of the embodiments is not limited in this respect.

[0116] In some embodiments, the mixer circuitry 806a of the transmit signal path may be configured to up-convert input baseband signals based on the synthesized frequency provided by the synthesizer circuitry 806d to generate RF output signals for the FEM circuitry 808. The baseband signals may be provided by the baseband circuitry 804 and may be filtered by filter circuitry 806c.

[0117] In some embodiments, the mixer circuitry 806a of the receive signal path and the mixer circuitry 806a of the transmit signal path may include two or more mixers and may be arranged for quadrature downconversion and upconversion, respectively. In some embodiments, the mixer circuitry 806a of the receive signal path and the mixer circuitry 806a of the transmit signal path may include two or more mixers and may be arranged for image rejection (e.g., Hartley image rejection). In some embodiments, the mixer circuitry 806a of the receive signal path and the mixer circuitry 806a may be arranged for directdownconversion and direct upconversion, respectively. In some embodiments, the mixer circuitry 806a of the receive signal path and the mixer circuitry 806a of the transmit signal path may be configured for super-heterodyne operation.

[0118] In some embodiments, the output baseband signals and the input baseband signals may be analog baseband signals, although the scope of the embodiments is not limited in this respect. In some alternate embodiments, the output baseband signals and the input baseband signals may be digital baseband signals. In these alternate embodiments, the RF circuitry 806 may include analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuitry and the baseband circuitry 804 may include a digital baseband interface to communicate with the RF circuitry 806.

[0119] In some dual-mode embodiments, a separate radio IC circuitry may be provided for processing signals for each spectrum, although the scope of the embodiments is not limited in this respect.

[0120] In some embodiments, the synthesizer circuitry 806d may be a fractional-N synthesizer or a fractional N / N+l synthesizer, although the scope of the embodiments is not limited in this respect as other types of frequency synthesizers may be suitable. For example, synthesizer circuitry 806d may be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer comprising a phase-locked loop with a frequency divider.

[0121] The synthesizer circuitry 806d may be configured to synthesize an output frequency for use by the mixer circuitry 806a of the RF circuitry 806 based on a frequency input and a divider control input. In some embodiments, the synthesizer circuitry 806d may be a fractional N / N+l synthesizer.

[0122] In some embodiments, frequency input may be provided by a voltage controlled oscillator (VCO), although that is not a requirement. Divider control input may be provided by either the baseband circuitry 804 or the applications processor 802 depending on the desired output frequency. In some embodiments, a divider control input (e.g., N) may be determined from a look-up table based on a channel indicated by the applications processor 802.

[0123] Synthesizer circuitry 806d of the RF circuitry 806 may include a divider, a delay- locked loop (DLL), a multiplexer and a phase accumulator. In some embodiments, the divider may be a dual modulus divider (DMD) and the phase accumulator may be a digitalphase accumulator (DPA). In some embodiments, the DMD may be configured to divide the input signal by either N or N+l (e.g., based on a carry out) to provide a fractional division ratio. In some example embodiments, the DLL may include a set of cascaded, tunable, delay elements, a phase detector, a charge pump and a D-type flip-flop. In these embodiments, the delay elements may be configured to break a VCO period up into Nd equal packets of phase, where Nd is the number of delay elements in the delay line. In this way, the DLL provides negative feedback to help ensure that the total delay through the delay line is one VCO cycle.

[0124] In some embodiments, synthesizer circuitry 806d may be configured to generate a carrier frequency as the output frequency, while in other embodiments, the output frequency may be a multiple of the carrier frequency (e.g., twice the carrier frequency, four times the carrier frequency) and used in conjunction with quadrature generator and divider circuitry to generate multiple signals at the carrier frequency with multiple different phases with respect to each other. In some embodiments, the output frequency may be a LO frequency (fLO). In some embodiments, the RF circuitry 806 may include an IQ / polar converter.

[0125] FEM circuitry 808 may include a receive signal path which may include circuitry configured to operate on RF signals received from one or more antennas 810, amplify the received signals and provide the amplified versions of the received signals to the RF circuitry 806 for further processing. FEM circuitry 808 may also include a transmit signal path which may include circuitry configured to amplify signals for transmission provided by the RF circuitry 806 for transmission by one or more of the one or more antennas 810. In various embodiments, the amplification through the transmit or receive signal paths may be done solely in the RF circuitry 806, solely in the FEM 808, or in both the RF circuitry 806 and the FEM 808.

[0126] In some embodiments, the FEM circuitry 808 may include a TX / RX switch to switch between transmit mode and receive mode operation. The FEM circuitry may include a receive signal path and a transmit signal path. The receive signal path of the FEM circuitry may include an LN A to amplify received RF signals and provide the amplified received RF signals as an output (e.g., to the RF circuitry 806). The transmit signal path of the FEM circuitry 808 may include a power amplifier (PA) to amplify input RF signals (e.g., provided by RF circuitry 806), and one or more filters to generate RF signals for subsequent transmission (e.g., by one or more of the one or more antennas 810).

[0127] In some embodiments, the PMC 812 may manage power provided to thebaseband circuitry 804. In particular, the PMC 812 may control power-source selection, voltage scaling, battery charging, or DC-to-DC conversion. The PMC 812 may often be included when the device 800 is capable of being powered by a battery, for example, when the device is included in a UE. The PMC 812 may increase the power conversion efficiency while providing desirable implementation size and heat dissipation characteristics.

[0128] While FIG. 8 shows the PMC 812 coupled only with the baseband circuitry 804. However, in other embodiments, the PMC 8 12 may be additionally or alternatively coupled with, and perform similar power management operations for, other components such as, but not limited to, application circuitry 802, RF circuitry 806, or FEM 808.

[0129] In some embodiments, the PMC 812 may control, or otherwise be part of, various power saving mechanisms of the device 800. For example, if the device 800 is in an RRC_Connected state, where it is still connected to the RAN node as it expects to receive traffic shortly, then it may enter a state known as Discontinuous Reception Mode (DRX) after a period of inactivity. During this state, the device 800 may power down for brief intervals of time and thus save power.

[0130] If there is no data traffic activity for an e8ended period of time, then the device 800 may transition off to an RRC_Idle state, where it disconnects from the network and does not perform operations such as channel quality feedback, handover, etc. The device 800 goes into a very low power state and it performs paging where again it periodically wakes up to listen to the network and then powers down again. The device 800 may not receive data in this state, in order to receive data, it can transition back to RRC_Connected state.

[0131] An additional power saving mode may allow a device to be unavailable to the network for periods longer than a paging interval (ranging from seconds to a few hours). During this time, the device is totally unreachable to the network and may power down completely. Any data sent during this time incurs a large delay and it is assumed the delay is acceptable.

[0132] Processors of the application circuitry 802 and processors of the baseband circuitry 804 may be used to execute elements of one or more instances of a protocol stack. For example, processors of the baseband circuitry 804, alone or in combination, may be used to execute Eayer 3, Eayer 2, or Eayer 1 functionality, while processors of the application circuitry 804 may utilize data (e.g., packet data) received from these layers and further execute Eayer 4 functionality (e.g., transmission communication protocol (TCP) and userdatagram protocol (UDP) layers). As referred to herein, Layer 3 may comprise a radio resource control (RRC) layer, described in further detail below. As referred to herein, Layer 2 may comprise a medium access control (MAC) layer, a radio link control (RLC) layer, and a packet data convergence protocol (PDCP) layer, described in further detail below. As referred to herein, Layer 1 may comprise a physical (PHY) layer of a UE / RAN node, described in further detail below.

[0133] FIG. 9 illustrates example interfaces of baseband circuitry in accordance with some embodiments. As discussed above, the baseband circuitry 804 of FIG. 8 may comprise processors 804A-804E and a memory 804G utilized by said processors. Each of the processors 804A-804E may include a memory interface, 904A-904E, respectively, to send / receive data to / from the memory 804G.

[0134] The baseband circuitry 804 may further include one or more interfaces to communicatively couple to other circuitries / devices, such as a memory interface 912 (e.g., an interface to send / receive data to / from memory e8emal to the baseband circuitry 804), an application circuitry interface 914 (e.g., an interface to send / receive data to / from the application circuitry 802 of FIG. 8), an RF circuitry interface 916 (e.g., an interface to send / receive data to / from RF circuitry 806 of FIG. 8), a wireless hardware connectivity interface 918 (e.g., an interface to send / receive data to / from Near Field Communication (NFC) components, Bluetooth® components (e.g., Bluetooth® Low Energy), Wi-Fi® components, and other communication components), and a power management interface 920 (e.g., an interface to send / receive power or control signals to / from the PMC 812.

[0135] FIG. 10 is an illustration of a control plane protocol stack in accordance with some embodiments. In one embodiment, a control plane 1000 may be a communications protocol stack between one or more UEs such as, for example, UE 801 (or alternatively, the UE 802), and / or one or more RAN nodes 811 (or alternatively, the RAN node 812), and a mobility management entity (MME) 821.

[0136] The PHY layer 1001 may transmit or receive information used by the MAC layer 1002 over one or more air interfaces. The PHY layer 1001 may further perform link adaptation or adaptive modulation and coding (AMC), power control, cell search (e.g., for initial synchronization and handover purposes), and other measurements used by higher layers, such as the RRC layer 1005. The PHY layer 1001 may still further perform error detection on the transport channels, forward error correction (FEC) coding / decoding of thetransport channels, modulation / demodulation of physical channels, interleaving, rate matching, mapping onto physical channels, and Multiple Input Multiple Output (MIMO) antenna processing.

[0137] The MAC layer 1002 may perform mapping between logical channels and transport channels, multiplexing of MAC service data units (SDUs) from one or more logical channels onto transport blocks (TB) to be delivered to PHY via transport channels, demultiplexing MAC SDUs to one or more logical channels from transport blocks (TB) delivered from the PHY via transport channels, multiplexing MAC SDUs onto TBs, scheduling information reporting, error correction through hybrid automatic repeat request (HARQ), and logical channel prioritization.

[0138] The RLC layer 1003 may operate in a plurality of modes of operation, including: Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). The RLC layer 1003 may execute transfer of upper layer protocol data units (PDUs), error correction through automatic repeat request (ARQ) for AM data transfers, and concatenation, segmentation and reassembly of RLC SDUs for UM and AM data transfers. The RLC layer 1003 may also execute re-segmentation of RLC data PDUs for AM data transfers, reorder RLC data PDUs for UM and AM data transfers, detect duplicate data for UM and AM data transfers, discard RLC SDUs for UM and AM data transfers, detect protocol errors for AM data transfers, and perform RLC re-establishment.

[0139] The PDCP layer 1004 may execute header compression and decompression of IP data, maintain PDCP Sequence Numbers (SNs), perform in-sequence delivery of upper layer PDUs at re-establishment of lower layers, eliminate duplicates of lower layer SDUs at reestablishment of lower layers for radio bearers mapped on RLC AM, cipher and decipher control plane data, perform integrity protection and integrity verification of control plane data, control timer-based discard of data, and perform security operations (e.g., ciphering, deciphering, integrity protection, integrity verification, etc.).

[0140] The main services and functions of the RRC layer 1005 may include broadcast of system information (e.g., included in Master Information Blocks (MIBs) or System Information Blocks (SIBs) related to the non-access stratum (NAS)), broadcast of system information related to the access stratum (AS), paging, establishment, maintenance and release of an RRC connection between the UE and E-UTRAN (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release),establishment, configuration, maintenance and release of point to point Radio Bearers, security functions including key management, inter radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting. Said MIBs and SIBs may comprise one or more information elements (IES), which may each comprise individual data fields or data structures.

[0141] In one example, a UE (e.g., UE 106A-N) and a RAN node (e.g., base station 102) 811may utilize a Uu interface (e.g., an LTE-Uu interface) to exchange control plane data via a protocol stack comprising the PHY layer 1001, the MAC layer 1002, the RLC layer 1003, the PDCP layer 1004, and the RRC layer 1005.

[0142] The non-access stratum (NAS) protocols 1006 form the highest stratum of the control plane between the UE (e.g., UE 106A-N) 801 and an MME 821. The NAS protocols 1006 support the mobility of the UE (e.g., UE 106A-N) 801and the session management procedures to establish and maintain IP connectivity between the UE (e.g., UE 106A-N) 801and a P-GW.

[0143] The SI Application Protocol (S 1-AP) layer 1015 may support the functions of the SI interface and comprise Elementary Procedures (EPs). An EP is a unit of interaction between a RAN node (e.g., base station 102)81 land the CN. The S 1-AP layer 1015 services may comprise two groups: UE-associated services and non UE-associated services. These services perform functions including, but not limited to: E-UTRAN Radio Access Bearer (E- RAB) management, UE capability indication, mobility, NAS signaling transport, RAN Information Management (RIM), and configuration transfer.

[0144] The Stream Control Transmission Protocol (SCTP) layer (alternatively referred to as the SCTP / IP layer) 1014 may ensure reliable delivery of signaling messages between the RAN node (e.g., base station 102) 81 land a MME821 based, in part, on the IP protocol, supported by the IP layer 1013. The L2 layer 1012 and the LI layer 1011 may refer to communication links (e.g., wired or wireless) used by the RAN node (e.g., base station 102) and the MME to exchange information.

[0145] The RAN node (e.g., base station 102) 811and the MME 821may utilize an Sl- MME interface to exchange control plane data via a protocol stack comprising the LI layer 1011, the L2 layer 1012, the IP layer 1013, the SCTP layer 1014, and the Sl-AP layer 1015.CSI Feedback

[0146] In 3GPP standards development, channel state information (CSI) feedback has been an important topic in almost every 3 GPP standards release. Further, nearly all CSI codebook design has been focused on feedback based on a current CSI reference signal (CSI-RS) measurement. Figure 11 illustrates an example timing diagram 1100 of utilizing CSI feedback, according to some embodiments. As illustrated in Figure 11 , a base station 102 (e.g., gNB) transmits a CSI measurement configuration to a UE 106 at 1110 that provides instructions for the UE to measure CSI reference signals (CSI-RS). As described in further detail below, a CSI-RS may be periodic / semi-persistent or aperiodic. A CSI configuration may include information about the types of CSI-RS, the time and / or frequency to measure the CSI-RS, and the like. Base station 102 (e.g., gNB) transmits a CSI-RS to a UE 106 at 1120. UE 106 performs measurements on the CSI-RS and performs channel estimation at 1130. That is, for example, UE 106 may estimate a raw channel matrix. Based on the estimated raw channel matrix, UE 106 provides feedback to the BS 102 at 1140. As illustrated in Figure 11, this feedback may generally be referred to as a CSI report. A CSI report may include various types of feedback information (e.g., Channel Quality Information (CQI), Layer Indicator, etc.) and may further represent the estimated raw channel matrix in various ways. For example, a preceding matrix may be derived from the raw channel matrix. Further, a precoding matrix may be indexed according to codebooks at UE 106 and BS 102, (e.g., a Type I or Type II codebook) and a CSI report may include a precoding matrix index (PMI) (i.e., precoding codeword or precoding matrix indicator) from which BS 102 can derive a preceding matrix using the shared codebook. BS 102 may design a downlink transmission based on the feedback at 1150. That is, for example, BS 102 may select a channel for a downlink transmission based on the derived precoding matrix. BS 102 performs the downlink transmission according to the design at 1160.

[0147] As described above, a CSI-RS may be periodic / semi-persistent or aperiodic. Figure 12A illustrates an example of CSI feedback based on a periodic CSI-RS transmitted in selected resource elements (RE) in accordance with some embodiments. Figure 12B illustrates an example of CSI feedback based on an aperiodic CSI-RS in accordance with some embodiments. As illustrated in Figure 12A, the CSI-RS is transmitted according to a period, i.e., every 18 slots in the example of Figure 12A. It should be noted that a semi- persistent CSI-RS is similar to a periodic CSI-RS, in that transmission may be scheduledaccording to period, but each scheduled transmission may be sent or not sent, according to a trigger. In the example illustrated in Figure 12B, a CSI-RS is transmitted according to a trigger and a timing offset. That is, as illustrated in Figure 12B, the CSI-RS is transmitted 4 slots after a trigger. A trigger may include a downlink control information (DCI) signal or another type of signaling, including medium access control (MAC) or radio resource control (RRC) signaling. As further illustrated in Figure 12A and 12B, a CSI report may be signaled via the uplink at a time after the CSI-RS. It should be noted that in some examples, depending on a particular configuration a slot may be 0.0625 to 1 ms.

[0148] Configuration information for CSI-RS and feedback signaling (i.e., a CSI configuration) may be provided to a UE via a DL radio resource control (RRC) message. For example, configuration information may indicate whether the CSI-RS is periodic / semi- persistent or aperiodic and in the case of a periodic CSI-RS may indicate the period in terms of number of slots and in the case of aperiodic CSI-RS configuration information may specify the timing offsets. Further, configuration information may indicate information about CSI-RS resources. That is, the RRC message may indicate the resource elements of a CSI-RS according to a number of antenna port numbers, a density (number of resource elements allocated per port), multiplexing type, and locations within a slot (i.e., frequency and time domain locations). In some examples, a CSI-RS may correspond to up 32 different antenna ports (e.g., 1 , 2, 4, 8, 16, 24, or 32). Figure 12A illustrates an example where a CSI-RS includes a single resource element at a single port. A resource element is a time and frequency (i.e., sub-bands are represented by vertical locations) location for a signal. In the case of multiple antenna ports, the locations of resource elements in a resource block are provided for each respective antenna port.

[0149] Referring to FIG. 12B , Rel- 18 Type II codebook enhancement for high / medium velocity, for (Channel Measurement Resource) (CMR) configuration, provides where an aperiodic CSI-RS may be signaled according to a resource set. That is, for a single triggering instance, K>1 CSI-RS resources may be included in a resource set, where the separation between 2 consecutive resources is m slot(s). FIG. 12B, illustrates an example where the aperiodic CSI-RS includes a resource set with K equals 4 and m equals 2. It should be noted that Rel- 18 Type II codebook enhancement provide where: The number of CSI-RS ports is the same for all the K configured aperiodic CSI-RS resources; The antenna ports for the same antenna port index across the K CSI-RS resources are the same; All the K configured aperiodic CSI-RS resources comprising the channel measurementresource (CMR) (i.e., resource set) share the same bandwidth and resource element; Only one Non-Zero Power (NZP) CSI-RS resource or one CSI-IM (CSI Interference Measurement) resource can be configured for IMR (Interference Measurement Resources) irrespective the value of K; and on PDSCH EPRE (Energy per Resource Element) assumption for CQI calculation, a same powerControlOffset value is assumed for all the K configured CSI-RS resources comprising the resource set.

[0150] It should be noted that CSI feedback may incur significant overhead. That is, for example, frequent of signaling of CSI reports from multiple UEs may incur significant overhead in the communication bandwidth. Massive multiple-input and multiple output (MIMO), in which the gNB uses a large array of antennas, can considerably improve the system performance. However, the benefit of massive MIMO is based on the knowledge of downlink CSI. In frequency division duplexing (FDD) massive MIMO systems, the UE will feedback the downlink CSI-RS measurements to the BS through the uplink because of the lack of channel reciprocity. The feedback overhead can be substantial due to the high dimension of the CSI in massive MIMO systems. In addition, a large amount of power is used at the UE to provide the feedback.

[0151] Further, CSI feedback performance may be impacted by channel aging. That is, in an implemented system, channel characteristics are inherently time varying and the processing delays and UE mobility may cause a channel estimated from a CSI-RS to degrade by the time a downlink transmission occurs according to the downlink derived according to the CSI.

[0152] One way of reducing the amount of feedback and reducing power consumption at the UE is through the use of CSI compression and CSI prediction Al-based models.Al based CSI Feedback Compression and CSI Prediction

[0153] As provided in 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Study on Artificial Intelligence (AI)ZMachine Learning (ML) for NR air interface (Release 18), 3GPP TR 38.843 V18.0.0 (2023-12), the 3GPP standards development, (hereinafter 3GPP TR 38.843) Al-based techniques for compressing CSI feedback and Al-based techniques for channel prediction are currently being studied. It should be noted that Al-based may refer to various Al and MachineLearning (ML) techniques, which may be referred to as AI / ML. Figure 13 illustrates an example of a two-sided Al model for CSI compression, according to some embodiments. Figure 14 illustrates an example of a one-sided Al model for CSI prediction, according to some embodiments. Figure 15 illustrates an example of an Al model for joint CSI prediction and compression, according to some embodiments.

[0154] In the example illustrated in Figure 13, UE 106 receives a CSLRS and CSI Measurement and Channel Estimator 1310 measures the CSLRS and performs channel estimation, for example, as described above. For example, CSI Measurement and Channel Estimator 1310 may derive a raw channel matrix, a precoding matrix, and / or a PMI. AL Based Encoder 1320 may receive one or more of a raw channel matrix, a precoding matrix, and a PMI and generate a feedback bitstream according to Al-based encoding techniques. For example, AI-Based Encoder 1320 may receive a raw channel matrix and compress the raw channel matrix according to several Neural Network (NN) layers, for example, one or more convolution layers, and generate a feedback bitstream. For example, AI-Based Encoder 1320 may include an autoencoder. AI-Based Decoder 1330 may perform reciprocal functions of AI-Based Encoder 1320. That is, AI-Based Decoder 1330 receives a feedback bitstream reconstructs the corresponding information that was encoded, e.g., a raw channel matrix. Downlink Transmission Designer 1340 uses this reconstructed information to design a downlink transmission for example, as described above. A two- sided Al model for CSI compression attempts to compress CSI feedback information and thereby reduce the overhead of CSI feedback.

[0155] 3GPP TR 38.843 provides that for CSI compression using a two-sided model use case, considered AI / ML model training collaborations include: Type 1: Joint training of the two-sided model at a single side / entity, e.g., UE-sided or Network-sided; Type 2: Joint training of the two-sided model at network side and UE side, respectively; and Type 3: Separate training at network side and UE side, where the UE-side CSI generation part and the NW-side CSI reconstruction part are trained by UE side and network side, respectively.

[0156] In the example illustrated in Figure 14, UE 106 receives a CSLRS and CSI Measurement and Channel Estimator 1310 measures the CSLRS and performs channel estimation, for example, as described above. Al Model 1410 receives information from CSI Measurement and Channel Estimator 1310. For example, Al Model 1410 may receiveprevious CSI-RS measurements and / or previous estimated raw channel matrices. Al Model 1410 performs channel prediction according to an CSI prediction Al model based on the received data.

[0157] For example, Al model 1410 may be a one-dimensional Long short-term memory (LSTM) Al model for CSI prediction using a time domain. In some example, the Al model 1410 may be use for predicting time domain correlation only (such as, for example, the LSTM). In one example the time-series CSI measurements may be fed into the LSTM layer, which outputs a vector capturing temporal dependencies and this vector may be fed into a fully connected (FC) layer to generate the CSI prediction output. In other examples, Al model 1410 may be a two-dimensional convolutional neural network (“CNN”) Al model for CSI prediction using a time domain and a frequency domain. For example, a 2D CNN can capture a batch of input data, where each sample can comprise a time series of CSI measurements across different frequency subcarriers. This input tensor may be passed through a series of 2D convolutional layers (e.g., neural network) and enable the model to identify patterns in the CSI that extend across both time steps and subcarriers. Al model 1410 may learn and provide CSI predictions across the future time steps and subcarriers based on the measurements of the CSLRS input into the Al model as training. In other examples, Al model 1410 may be a three-dimensional convolutional neural network (CNN) Al model for CSI prediction using a time domain and a frequency domain and a spatial (antenna) domain. As the inputs pass through the 3D convolutional layers (e.g., neural network), Al model 1410 may learn and predict the future CSI values across time, frequency, and antenna (spatial) domains. It should be noted that due to different designs, the model data collection categorization information can be different.

[0158] Further, the predicted channel may then be used as a CSLReport to provide uplink feedback to BS 102. That is, for example, a PMI may be derived from a predicted channel matrix. Downlink Transmission Designer 1340 can use this uplink feedback to design a downlink transmission for example, as described above. That is, according to CSI prediction, a UE may fine-tune CSI feedback using Al-based encoding techniques and the fine-tuned CSI feedback may result in a downlink design which is less susceptible to channel aging. Further, in some case, a CSI prediction can be used by the UE rather than a subsequent CSI-RS transmission. This can reduce CSLRSs which are transmitted from the BS to the UE.

[0159] 3GPP TR 38.843 provides the following cases for CSI prediction: For model training, training data can be generated by UE. For UE-side model inference, input data is internally available at UE. For performance monitoring at the NW side, calculated performance metrics (if needed) or data needed for performance metric calculation (if needed) can be generated by UE and terminated at gNB. Further, 3GPP TR 38.843 specifies the following types of performance monitoring:Type 1:UE calculates the performance metric(s)UE reports performance monitoring output that facilitates functionality fallback decision at the network-Performance monitoring output details can be further defined-NW may configure threshold criterion to facilitate UE side performance monitoring (if needed).NW makes decision(s) of functionality fallback operation (fallback mechanism to legacy CSI reporting).Type 2;UE reports predicted CSI and / or the corresponding ground-truthNW calculates the performance metrics.NW makes decision(s) of functionality fallback operation (fallback mechanism to legacy CSI reporting).Type 3:UE calculates the performance metric(s)UE reports performance metric(s) to the NWNW makes decision(s) of functionality fallback operation (fallback mechanism to legacy CSI reporting).

[0160] In the example illustrated in Figure 15, a UE 106 and BS may use Al model(s) for joint CSI prediction and compression. That is, the predicted channel may be used as input to AI-Based Encoder 1320 and Al-Based Encoder 1320 may generate a feedback bitstream according to Al-based encoding techniques.

[0161] As described above, configuration information for CSI-RS and feedback signaling may indicate CSI-RS timing information and CSI-RS resource information. In the case of CSI prediction using a UE sided model, additional configuration information may be specified. For example, it has been agreed that for Al-based CSI prediction, at least for inference, legacy CSI-RS configuration can be a starting point.

[0162] As described above with respect to FIG. 12B, Rel-18 Type II codebook enhancement for high / medium velocity, for (Channel Measurement Resource) (CMR) configuration, provides where a aperiodic CSI-RS may be signaled according to a resource set. For Rel-18 Type II codebook enhancement for CSI prediction the following with respect to CSI prediction, a CSI-RS configuration has been specified according to the following notation: m : offset between two adjacent AP-CSI-RS resources for the CMR in slots, m G {1,2} slots- K : the number of AP-CSI-RS resources for the CMR, K G {4,8,12}- 8 : number of slots from the CSI report slot to the first predicted CSI, 6 E {0,1,2} slotsN4t number of predicted CSI, N4E {1,2, 4, 8} d : distance between two predicted CSI in slotsFor periodic / semi-persistent CSI-RS, d equals to the periodicity of the CSI- RS resourceFor aperiodic CSI-RS, d E {1, m slotsQ : number of selected time / Doppler basis, Q E {2} for N4> 1

[0163] Figure 16 illustrates an example of CSI prediction based on a CSI-RS resource set in accordance with some embodiments. Figure 16 illustrates an example where for a CSI- RS resource set with K = 4, m = 2, a CSI prediction with N4, d = 2, and 6 = 2. It should be noted that each of K, m, N4, d, and 8 may be configured via an RRC message. As illustrated in FIG. 16, the K resource set corresponds to a measurement window for prediction and the N4 window corresponds to a prediction window for ground truth measurement. That is,measurements of K = 1, 2, 3, and 4 may be used to respectively predict N4 = 1, 2, 3, and 4 and the measurements corresponding to N4 = 1, 2, 3, and 4 may be used for ground truth for training and / or performance monitoring of the prediction model. It should be noted that N4 is the R18 CSI report codebook size, and the use of the variable N4 may indicate that the CSI prediction will be further coded by the R18 Doppler codebook. However, as described above in some cases, the R18 Doppler codebook may not be used, for example, in the case of joint Al based CSI prediction and CSI compression as described above. N4 is used herein as a general variable to distinguish a prediction window from a measurement window and may not necessarily indicate whether or not a particular codebook is utilized and may generally represent CSI prediction feedback.

[0164] Embodiments described herein provide apparatus, systems, and methods for CSI-RS configurations which may be used for CSI prediction according to an artificial intelligence (Al) based model. The embodiments described herein provide CSI-RS configurations which may be utilized for model training and / or performance monitoring of a model. As described above, in some cases, a UE determine a prediction window for ground truth measurement. The CSI-RS configurations may be useful for define a prediction window for ground truth measurement for model training and / or performance monitoring. The CSI- RS configurations described herein may apply to both a CSI prediction use case, and a joint CSI prediction and compression use case.CSI-RS Configurations for Training and Performance Monitoring

[0165] As described above, for a UE side CSI prediction Al-model performance monitoring can include: the UE reporting performance monitoring output; the UE reporting predicted CSI and / or the corresponding ground-truth; and / or the UE reporting performance metric(s). It should be noted that the UE may report similar information during training. Further, it should be noted that there may be various entities of a NW which the UE may reports to for training and / or performance monitoring. For example, in one example, the UE can transfer the reporting data to an over-the-top (“OTT”) server (e.g., a server accessed over the internet rather than through a mobile network) for offline training of the CSI prediction Al model (e.g., data delivery of the CSI-RS measurements can be performed over a non-3GPP interface).

[0166] In one example, according to the techniques herein, a CSI predictionconfiguration may provide that the same CSI-RS resource set is used for both measurement window and ground truth measurement in prediction window. In one example, for an aperiodic CSI-RS, a CSI prediction configuration may provide where a Ki>l aperiodic CSI-RS resource set and a N4 >= 1 aperiodic CSI-RS resource set correspond to a single triggering instance, where the separation of the Ki resources is m slot(s) and the separation of the N4 resources is d slot(s). Further, the separation between the resource sets may be specific as L>=1 slots. Figure 17 illustrates an example where a Ki aperiodic CSI-RS resource set and a N4 aperiodic CSI-RS resource set correspond to a single triggering instance, where Ki equals 4, m = 2, N4= 4, d = 2, and L = 13.

[0167] In one example, the number of CSI-RS ports may be the same for each of configured aperiodic CSI-RS resources sets. In one example, the antenna ports for the same antenna port index across the configured aperiodic CSI-RS resources sets may be the same. In one example, the same BW and REs of the configured aperiodic CSI-RS resources sets may be the same. For example, in the example of FIG. 17, in one example, Ki aperiodic CSI-RS resource set and a N aperiodic CSI-RS resource set may have the same number of ports, with the same indices, and the BW and REs may be the same. In one example, according to the techniques herein, values of m, d, and L may be selected from the following sets: m 6 {1, 2,3,4, 5,6,7,8},s7o / .sL G {4,5,8,10,12,15, 16, 20}slots d E {1,2, 3, 4, 5} slots

[0168] In one example, according to the techniques herein, a CSI prediction configuration may provide that a CSI-RS resource set is used for a measurement window and another CSI-RS resource set is used for ground truth measurement in a prediction window. In one example, in this case, an explicit association between the two sets may be provided for training. In one example, for an aperiodic CSI-RS, a CSI prediction configuration may provide where a Ki>l aperiodic CSI-RS resource set and a N4 >= 1 aperiodic CSI-RS resource set correspond to a single triggering instance, where the separation of the Ki resources is m slot(s) and the separation of the N4 resources is d slot(s). Further, the separation between the resource sets may be specific as L>=1 slots. Figure 18illustrates an example where a Ki aperiodic CSI-RS resource set is used for a measurement window and a Nr aperiodic CSI-RS resource set is used for ground truth measurement in prediction window and there is an explicit association between the two sets.

[0169] In one example, the number of CSI-RS ports may be the same for each of configured aperiodic CSI-RS resources sets. In one example, the antenna ports for the same antenna port index across the configured aperiodic CSI-RS resources sets may be the same. In one example, the same BW and REs of the configured aperiodic CSI-RS resources sets may be the same. For example, in the example of FIG. 18, in one example, Ki aperiodic CSI-RS resource set and a Nr aperiodic CSI-RS resource set may have the same number of ports, with the same indices, and the BW and REs may be the same. In one example, according to the techniques herein, values of m, d, and L may be selected from the following sets: m G {l,2,3,4,5,6,7,8]s / otsL G {4,5,8,10,12,15, 16, 20}slots d G {1,2, 3, 4, 5} slots

[0170] In one example, an association may be indicated according to the following example pseudocode:CSI-ResourceConfig ::= SEQUENCE { csi-ResourceConfigld CSI-ResourceConfigld, csi-RS-ResourceSetList CHOICE { nzp-CSI-RS-SSB SEQUENCE { nzp-CSI-RS-ResourceSetList SEQUENCE (SIZE (l..maxNrofNZP-CSI-RS- ResourceSetsPerConfig)) OF NZP-CSI-RS-ResourceSetldOPTIONAL , - Need R}, associatedCSIRS-MeasPredIdList-r!9 SEQUENCE (SIZE(l..maxNrofCSIRS-MeasPred — r!9)) OF CSIRS-MeasPredResourceId-rl9,},}

[0171] In one example, semi-persistent or periodic transmission of resource sets for measurement window and ground truth in prediction window may be enabled. For example, in the cases of Figures 17 and 18, the trigger may be semi -persistent or periodic transmission. In one example, semi-persistent transmission with triggering for data collection may be enabled. In one example, the periodic may be relatively long (e.g., 20, 40, 60 ms).

[0172] It should be noted that for an Al model, performance monitoring may occur with a much longer periodicity compared to inferencing. That is, for example, Al Model 1410 may generate CSI predictions much more frequently than performance is monitored. Further, it should be noted that in some cases. A CSI-RS measurement for inference may be used for performance monitoring. In one example, according to the techniques herein, if a CSI-RS measurement for inference is not used for performance monitoring, a CSI prediction configuration may provide that a CSI-RS resource set is used for a measurement window and for ground truth measurement in a prediction window, for example, as described above with respect to Figure 17. In one example, for an aperiodic CSI-RS, the NW can trigger CSI-RS transmission for performance monitoring CSI-RS transmission. In one example, the UE can perform type 1 or type 3 performance monitoring and report the monitoring metric or monitoring output back to NW, as described above. In one example, semi-persistent or periodic CSI-RS configuration may be used for performance monitoring.

[0173] In one example, according to the techniques herein, if a CSI-RS measurement for inference is used for performance monitoring, a CSI prediction configuration may provide that a CSI-RS resource set is used for a measurement window and another CSI-RS resource set is used for ground truth measurement in a prediction window. Figure 19 illustrates and example of this case. For performance monitoring the resource sets may be based on the example described above, with respect to Figure 18. In one example, for aperiodic CSI-RS an association between the two sets for performance monitoring are indicated. In one example, when a CSI-RS resource set for inferencing is semi -persistent or periodicconfigured, for time reference, the aperiodic CSI-RS for ground truth is associated with the nearest semi-persistent of periodic CSI-RS for inferencing.

[0174] It should be noted that CSI-RS transmission for performance monitoring can be used for data collection for training as well.

[0175] Figure 20 illustrates a block diagram of an example of a method 2000 for CSI- RS configuration for artificial intelligence (Al) based channel state information (CSI) prediction, according to some embodiments. The method shown in Figure 20 may be used in conjunction with any of the systems, methods, or devices shown in the Figures, among other devices. In various embodiments, some of the method elements shown may be performed concurrently, in a different order than shown, or may be omitted. Additional method elements may also be performed as desired. As shown, this method may operate as follows.

[0176] At 2010, a user equipment device (UE), such as UE 106, may determine a measurement window for CSI prediction. For example, a UE may determine a measurement window for CSI prediction corresponds to one of the configurations described above.

[0177] At 2020, the UE may determine a prediction window for ground truth measurement. For example, a UE may determine a measurement window for CSI prediction corresponds to one of the configurations described above.

[0178] In some examples, the measurement window and the prediction window correspond to a single CSI-RS resource set.

[0179] In some examples, the measurement window corresponds to a first CSI-RS resource set and the prediction window corresponds to a second CSI-RS resource set.

[0180] In some examples, there is an explicit association between the measurement window and the prediction window.

[0181] In some examples, a number of antenna ports is the same for the measurement window and the prediction window.

[0182] In some examples, wherein antenna ports have the same index for the measurement window and the prediction window.

[0183] In some examples, the prediction window is L slots from the measurementwindow.

[0184] In some examples, L is selected from a set having a minimum value of 4 and a maximum value of 20.

[0185] In some examples, adjacent resources in the CSI-RS resource set corresponding to the prediction window are offset by m slots.

[0186] In some examples, m is selected from the set { 1,2, 3, 4, 5, 6, 7, 8 } .

[0187] In some examples, adjacent resources in a CSI-RS resource set corresponding to the prediction window are offset by d slots.

[0188] In some examples, d is selected from the set { 1,2, 3, 4, 5 } .

[0189] In some examples, resources in the measurement window and the prediction window share the same bandwidth and resource elements.

[0190] In some examples, the measurement window and the prediction window are periodic.

[0191] In some examples, triggering is provided for data collection.

[0192] In some examples, the period is 20 ms, 40 ms, or 60 ms.

[0193] In some examples, the measurement window and the prediction window are used for training.

[0194] In some examples, the measurement window and the prediction window are used for performance monitoring.

[0195] In some examples, the measurement window and the prediction window are used for data collection.

[0196] In some examples, a network triggers performance monitoring.

[0197] In some examples, performance monitoring periodic.

[0198] In some examples, performance monitoring is semi-persistent.

[0199] It is well understood that the use of personally identifiable information should follow privacy policies and practices that are generally recognized as meeting or exceeding industry or governmental requirements for maintaining the privacy of users. In particular, personally identifiable information data should be managed and handled so as to minimize risks of unintentional or unauthorized access or use, and the nature ofauthorized use should be clearly indicated to users.

[0200] Embodiments of the present disclosure may be realized in any of various forms. For example, some embodiments may be realized as a computer-implemented method, a computer- readable memory medium, or a computer system. Other embodiments may be realized using one or more custom-designed hardware devices such as ASICs. Still other embodiments may be realized using one or more programmable hardware elements such as FPGAs.

[0201] In some embodiments, a non-transitory computer-readable memory medium may be configured so that it stores program instructions and / or data, where the program instructions, if executed by a computer system, cause the computer system to perform a method, e.g., any of the method embodiments described herein, or, any combination of the method embodiments described herein, or, any subset of any of the method embodiments described herein, or, any combination of such subsets.

[0202] In some embodiments, a device (e.g., a UE 106) may be configured to include a processor (or a set of processors) including one or more baseband processors and one or more application processors and a memory medium, where the memory medium stores program instructions, where the processor is configured to read and execute the program instructions from the memory medium, where the program instructions are executable to implement any of the various method embodiments described herein (or, any combination of the method embodiments described herein, or, any subset of any of the method embodiments described herein, or, any combination of such subsets). The device may be realized in any of various forms.

[0203] Any of the methods described herein for operating a user equipment (UE) may be the basis of a corresponding method for operating a base station, by interpreting each message / signal X received by the UE in the downlink as message / signal X transmitted by the base station, and each message / signal Y transmitted in the uplink by the UE as a message / signal Y received by the base station.

[0204] Although the embodiments above have been described in considerable detail, numerous variations and modifications will become apparent to those skilled in the art once the above disclosure is fully appreciated. It is intended that the following claims be interpreted to embrace all such variations and modifications.

Claims

CLAIMSWhat is claimed is:

1. An apparatus of a user equipment (UE) configured to perform training or performance monitoring for channel state information (CSI) prediction with an artificial intelligence (Al) model, the apparatus comprising: one or more processors configured to: determine a measurement window for a CSI prediction, wherein the measurement window corresponds to a CSI reference signal (CSI-RS) resource set; and determine a prediction window for a ground truth measurement; and a memory coupled to the one or more processors and configured to store measurements.

2. The apparatus of claim 1, wherein the measurement window and the prediction window are used for performance monitoring.

3. The apparatus of claim 2, wherein a network triggers performance monitoring.

4. The apparatus of claim 2, wherein performance monitoring is periodic.

5. The apparatus of claim 2, wherein performance monitoring is semi-persistent.

6. The apparatus of claim 1, wherein there is an explicit association between the measurement window and the prediction window.

7. The apparatus of claim 1, wherein the measurement window corresponds to a first CSI-RS set and the prediction window corresponds to a second CSI-RS set.

8. The apparatus of claim 1, wherein the measurement window and the prediction window correspond to a single CSI-RS set.

9. The apparatus of claim 1, wherein a number of antenna ports is the same for the measurement window and the prediction window.

10. The apparatus of claim 9, wherein antenna ports have the same index for the measurement window and the prediction window.

11. The apparatus of claim 1, wherein the prediction window is L slots from the measurement window.

12. The apparatus of claim 11, wherein L is selected from a set having a minimum value of 4 and a maximum value of 20.

13. The apparatus of claim 1, wherein adjacent resources in the CSI-RS set corresponding to the prediction window are offset by m slots.

14. The apparatus of claim 13, where m is selected from the set { 1,2, 3, 4, 5, 6, 7, 8}.

15. The apparatus of claim 1, wherein adjacent resources in a CSI-RS set corresponding to the prediction window are offset by d slots.

16. The apparatus of claim 15, where d is selected from the set { 1,2, 3, 4, 5 } .

17. The apparatus claim 1, wherein resources in the measurement window and the prediction window share the same bandwidth and resource elements.

18. The apparatus of claim 1, wherein the measurement window and the prediction window are periodic.

19. The apparatus of claim 18, wherein triggering is provided for data collection.

20. The apparatus of claim 18, wherein the period is 20 ms, 40 ms, or 60 ms.

21. The apparatus of claim 1, wherein the measurement window and the prediction window are used for training.

22. The apparatus of claim 1, wherein the measurement window and the prediction window are used for data collection.

23. A method to perform training or performance monitoring for channel state information (CS1) prediction using an artificial intelligence (Al) model, the method comprising: determining a measurement window for a CSI prediction, wherein the measurement window corresponds to a CSI reference signal (CSI-RS) resource set; and determining a prediction window for a ground truth measurement.

24. The method of claim 23, wherein the measurement window and the prediction window are used for performance monitoring.

25. The method of claim 23, wherein a network triggers performance monitoring.

26. The method of claim 23, wherein performance monitoring is periodic.

27. The method of claim 23, wherein performance monitoring is semi -persistent.

28. The method of claim 23, wherein there is an explicit association between the measurement window and the prediction window.

29. The method of claim 23, wherein the measurement window and the prediction window correspond to a single CSI-RS resource set.

30. The method of claim 23, wherein the measurement window corresponds to a first CSI-RS resource set and the prediction window corresponds to a second CSI-RS resource set.

31. The method of claim 23, wherein a number of antenna ports is the same for the measurement window and the prediction window.

32. The method of claim 31 , wherein antenna ports have the same index for the measurement window and the prediction window.

33. The method of claim 23, wherein the prediction window is L slots from the measurement window and wherein L is selected from a set having a minimum value of 4 and a maximum value of 20.

34. The method of claim 23, wherein adjacent resources in the CSI-RS resource set corresponding to the prediction window are offset by m slots, where m is selected from the set { 1,2, 3, 4, 5, 6, 7,8}.

35. The method of claim 23, wherein adjacent resources in a CSI reference signal resource set corresponding to the prediction window are offset by d slots, where d is selected from the set { 1,2,3, 4,5}.

36. The method of claim 23, wherein resources in the measurement window and the prediction window share the same bandwidth and resource elements.

37. A baseband processor configured to cause a user equipment (UE) to: determine a measurement window for a CSI prediction, wherein the measurement window corresponds to a CSI reference signal (CSI-RS) resource set; and determine a prediction window for a ground truth measurement, wherein the measurement window and the prediction window are used for performance monitoring and there is an explicit association between the measurement window and the prediction window.

38. The baseband processor of claim 37, wherein a network triggers performance monitoring.

39. The baseband processor of claim 37, wherein performance monitoring is periodic.

40. The baseband processor of claim 37, wherein performance monitoring is semi- persistent.

Images