Channel state information (CSI) prediction

Abstract

This disclosure provides systems, apparatuses, apparatuses, and methods, including computer programs encoded on a storage medium, for CSI prediction. The UE (102) performs (310) channel state information (CSI) prediction for one or more future time slots based on a measurement of a CSI reference signal (CSI-RS) on a CSI-RS resource. The UE (102) sends (312) a CSI prediction for one or more future time slots to a network entity.

Description

Technical Field

[0001] The present disclosure relates generally to wireless communications and, more particularly, to channel state information (CSI) prediction. Background Art

[0002] The Third Generation Partnership Project (3GPP) has specified a radio interface called Fifth Generation (5G) New Radio (NR) (5G NR). The architecture of a 5G NR wireless communication system includes the 5G Core (5GC) network, the 5G Radio Access Network (5G-RAN), and user equipment (UE). Compared to previous generation cellular communication systems, the 5G NR architecture aims to provide increased data rates, reduced latency, and / or increased capacity.

[0003] Wireless communication systems generally provide various telecommunication services (e.g., telephony, video, data, messaging, broadcast, etc.) based on multiple access technologies (such as orthogonal frequency division multiple access (OFDMA) technologies) that support communication with multiple UEs. The advancement of mobile broadband continues the development of such wireless communication technologies. For example, network entities such as base stations or units of base stations use CSI reports to select a digital precoder for a user equipment (UE). However, in some cases, a UE sends another CSI report while a previous CSI report is still valid. Such unnecessary CSI reports increase system overhead, which can lead to performance degradation in wireless communication systems. Summary of the Invention

[0004] The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects. This summary does not identify key or critical elements of all aspects, nor does it delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that will be presented later.

[0005] A network entity, such as a base station or a unit of a base station, uses channel state information (CSI) reports to select a digital precoder for a user equipment (UE). The precoding supports multiple-input multiple-output (MIMO) communications. The network entity can configure the CSI reports through radio resource control (RRC) signaling. To measure the characteristics of the radio channel, the UE receives a channel state information reference signal (CSI-RS) on a channel measurement resource (CMR). The network entity can also configure interference measurement resources (IMR) for the UE to measure interference. Using the configured CMR and IMR, the UE measures the CSI-RS and interference. The UE then sends a corresponding CSI report to the network entity.

[0006] Conventionally, a UE performs channel measurements during the CMR / IMR duration and later transmits a CSI report based on those measurements performed in the past. However, shortly after the network entity receives the CSI report and before the next CSI reporting slot, the CSI may become inaccurate. If this occurs, the network entity may select a precoder or other downlink parameters based on inaccurate information about the current channel conditions. Furthermore, for the purpose of triggering aperiodic CSI reporting at a certain time or configuring periodic or semi-persistent CSI reporting with a certain periodicity, the network entity cannot determine whether the previously reported CSI is outdated.

[0007] For example, if the interval between two CSI reports is too large, the network entity transmits a downlink signal based on outdated CSI for at least a portion of the interval, which can result in performance loss in the wireless communication system. In another example, if the interval between two CSI reports is too small, the UE sends unnecessary (e.g., too many / too frequent) CSI reports. In the "too small" case, the UE does not need to send the second CSI report because the first CSI report is still valid. Such unnecessary CSI reports increase system overhead, which can lead to performance degradation in the wireless communication system.

[0008] Various aspects of the present disclosure address the above and other deficiencies by predicting CSI in future time slots. In some examples, the UE performs machine learning inference based on previously measured CSI to predict CSI in one or more future time slots. A network entity may transmit a first control signal that configures at least one CSI reporting configuration for CSI reporting with CSI prediction based on at least one CSI-RS resource and configures a codebook for CSI reporting with CSI prediction. As an example, the network entity may transmit a second control signal that triggers the configured at least one CSI-RS resource and / or CSI reporting configuration for CSI reporting with CSI prediction. The network entity then transmits at least one CSI-RS on the at least one CSI-RS resource. Based on the CSI-RS measurement on the at least one CSI-RS resource, the UE performs CSI prediction for a time slot after the CSI reporting time slot or after the last symbol of the CSI-RS resource. The UE then transmits a CSI report with the CSI prediction to the network entity. With the predicted CSI for one or more future time slots, the network entity does not need to trigger CSI measurement and reporting in such one or more future time slots.

[0009] According to some aspects, a UE performs channel state information (CSI) prediction for one or more future time slots based on measurements of a CSI reference signal (CSI-RS) on a CSI-RS resource. The UE sends the CSI prediction for the one or more future time slots to a network entity.

[0010] According to some aspects, a network entity configures at least one CSI report with a CSI prediction based on a CSI-RS resource.The network entity receives at least one CSI report with a CSI prediction for one or more future time slots from a UE.

[0011] Advantageously, based on the predicted CSI for one or more future time slots, the network entity avoids triggering a CSI measurement and reporting procedure in one or more future time slots. As a result, the UE does not have to measure CSI and does not send CSI reports that provide little useful information, thereby saving UE and network resources and also improving system performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A diagram of a wireless communication system including a plurality of user equipments (UEs) and network entities communicating through one or more cells is shown.

[0013] Figure 2 is a signaling diagram illustrating an example of communication between a user equipment (UE) and a network entity for CSI prediction.

[0014] Figure 3 is a block diagram illustrating an example of UE behavior regarding CSI reporting with CSI prediction.

[0015] Figure 4 is a block diagram illustrating an example of network entity behavior with respect to CSI reporting with CSI prediction.

[0016] Figure 5 is a block diagram illustrating an example of CSI reporting with CSI prediction.

[0017] Figure 6 is a block diagram illustrating an example of prioritization of CSI reporting with CSI prediction.

[0018] Figure 7 is a block diagram illustrating another example of prioritization of CSI reporting with CSI prediction.

[0019] Figure 8 is a block diagram illustrating yet another example of prioritization of CSI reporting with CSI prediction.

[0020] Figure 9is a block diagram illustrating an example of priority of eType2 codebook-based CSI reporting with CSI prediction.

[0021] Figure 10 is a block diagram illustrating another example of priority of eType2 codebook-based CSI reporting with CSI prediction.

[0022] Figure 11 is a block diagram illustrating yet another example of priority of eType2 codebook-based CSI reporting with CSI prediction.

[0023] Figure 12 is a flow chart of a method at a UE for wireless communication of CSI reporting with CSI prediction.

[0024] Figure 13 is a flow chart of a method at a network entity for wireless communication of CSI reporting with CSI prediction.

[0025] Figure 14 is a diagram illustrating a hardware implementation of an example UE equipment.

[0026] Figure 15 is a diagram illustrating a hardware implementation of one or more example network entities. DETAILED DESCRIPTION

[0027] Figure 1 A diagram 100 of a wireless communication system associated with multiple cells 190 is shown. The wireless communication system includes a user equipment (UE) 102 and a base station / network entity 104. Some base stations may include a converged base station architecture, while other base stations may include a disaggregated base station architecture. A converged base station architecture utilizes a radio protocol stack that is physically or logically integrated within a single radio access network (RAN) node. A disaggregated base station architecture utilizes a protocol stack that is physically or logically distributed across two or more units (e.g., a radio unit (RU) 106, a distributed unit (DU) 108, or a central unit (CU) 110). Any of the RU 106, DU 108, and CU 110 may be implemented as a virtual unit, such as a virtual radio unit (VRU), a virtual distributed unit (VDU), or a virtual central unit (VCU). A base station / network entity 104 (e.g., a converged base station or a disaggregated unit of a base station, such as the RU 106 or DU 108) may be referred to as a transmission reception point (TRP).

[0028] The operation and / or network design of the base station 104 can be based on the aggregated nature of base station functionality. For example, a disaggregated base station architecture is utilized in an integrated access backhaul (IAB) network, an open radio access network (O-RAN) network, or a virtualized radio access network (vRAN) (which may also be referred to as a cloud radio access network (C-RAN)). Disaggregation can include distributing functionality between two or more units located at various physical locations, as well as virtually distributing the functionality of at least one unit, which can enable flexibility in network design. Various units of a disaggregated base station architecture or disaggregated RAN architecture can be configured for wired or wireless communication with at least one other unit. For example, the base station 104a / 104e and / or RUs 106a-106d can communicate with UEs 102a-102d and 102s via one or more radio frequency (RF) access links based on a Uu interface. In an example, multiple RUs 106 and / or base stations 104 can simultaneously serve a UE 102, such as via intra-cell and / or inter-cell access links between the UE 102 and the RUs 106 / base stations 104.

[0029] The RU 106, DU 108, and CU 110 may include (or may be coupled to) one or more interfaces configured to transmit or receive information / signals via a wired or wireless transmission medium. For example, a wired interface may be configured to transmit or receive information / signals via a wired transmission medium, such as via a fronthaul link 160 between the RU 106d and a baseband unit (BBU) 112 of the base station 104d associated with the cell 190d. The BBU 112 includes the DU 108 and the CU 110, which may also have a wired interface (e.g., a midhaul link) configured between the DU 108 and the CU 110 to transmit or receive information / signals between the DU 108d and the CU 110d. In a further example, a wireless interface, which may include a receiver, transmitter, or transceiver (such as an RF transceiver), is configured to transmit and / or receive information / signals via a wireless transmission medium, such as information transmitted between RU 106a of cell 190a and base station 104e of cell 190e via cross-cell communication beams 136-138 of RU 106a and base station 104e.

[0030] The RU 106 may be configured to implement lower layer functions. For example, the RU 106 is controlled by the DU 108 and may correspond to a logical node that hosts RF processing functions or lower layer PHY functions, such as performing fast Fourier transform (FFT), inverse FFT (iFFT), digital beamforming, physical random access channel (PRACH) extraction and filtering, etc. The functions of the RU 106 may be based on functional divisions, such as the functional divisions of the lower layers.

[0031] The RU 106 can transmit or receive over-the-air (OTA) communications with one or more UEs 102. For example, the RU 106b of cell 190b communicates with the UE 102b of cell 190b via the first communication beam set 132 of the RU 106b and the second communication beam set 134b of the UE 102b, which may correspond to inter-cell communication beams or, in some examples, cross-cell communication beams. For example, the UE 102b of cell 190b can communicate with the RU 106a of cell 190a via the third communication beam set 134a of the UE 102b and the fourth communication beam set 136 of the RU 106a. The associated DU 108 controls the real-time and non-real-time characteristics of the control plane and user plane communications of the RU 106.

[0032] Any combination of RU 106, DU 108, and CU 110, or any reference to any of them individually, may correspond to base station 104. Thus, base station 104 may include at least one of RU 106, DU 108, or CU 110. Base station 104 provides access to the core network for UE 102. Base station 104 may relay communications between UE 102 and the core network. Base station 104 may be associated with a macro cell of a high-power cellular base station and / or a small cell of a low-power cellular base station. For example, cell 190e may correspond to a macro cell, while cells 190a-190d may correspond to small cells. Small cells include femto cells, pico cells, micro cells, and the like. A cell structure including at least one macro cell and at least one small cell may be referred to as a "heterogeneous network."

[0033] Transmissions from a UE 102 to a base station 104 / RU 106 are referred to as uplink (UL) transmissions, while transmissions from a base station 104 / RU 106 to a UE 102 are referred to as downlink (DL) transmissions. Uplink transmissions may also be referred to as reverse link transmissions, while downlink transmissions may also be referred to as forward link transmissions. For example, RU 106 d utilizes antenna 114 of base station 104 d in cell 190 d to transmit downlink / forward link communications to UE 102 d or receive uplink / reverse link communications from UE 102 d over a Uu interface associated with an access link between UE 102 d and base station 104 d / RU 106 d.

[0034] The communication link between the UE 102 and the base station 104 / RU 106 can be based on multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. The communication link can be associated with one or more carriers. The UE 102 and the base station 104 / RU 106 can utilize a spectrum bandwidth of Y MHz (e.g., 5 MHz, 10 MHz, 15 MHz, 20 MHz, 100 MHz, 400 MHz, 800 MHz, 1600 MHz, 2000 MHz, etc.) per carrier, allocated in a carrier aggregation of up to a total of Yx MHz, with x component carriers (CCs) used for communication in each of the uplink and downlink directions. The carriers may or may not be adjacent to each other along the spectrum. In an example, uplink and downlink carriers can be allocated in an asymmetric manner, with more or fewer carriers allocated for the uplink or downlink. The component carriers can include a primary component carrier and one or more secondary component carriers. The primary component carrier may be associated with a primary cell (PCell), and the secondary component carrier may be associated with a secondary cell (SCell).

[0035] Some UEs 102 (such as UEs 102a and 102s) can perform device-to-device (D2D) communication via a sidelink. For example, the sidelink communication / D2D link utilizes the spectrum of a wireless wide area network (WWAN) associated with uplink and downlink communications. The sidelink communication / D2D link can also use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and / or a physical sidelink control channel (PSCCH), to transmit information between UEs 102a and 102s. Such sidelink / D2D communication can be performed via various wireless communication systems, such as wireless fidelity (Wi-Fi) systems, Bluetooth systems, long term evolution (LTE) systems, new radio (NR) systems, and the like.

[0036] UE 102 and base station 104 / RU 106 may each include multiple antennas. The multiple antennas may correspond to antenna elements, antenna panels, and / or antenna arrays that may facilitate beamforming operations. For example, RU 106b may transmit downlink beamformed signals to UE 102b based on a first communication beam set 132 in one or more transmit directions of RU 106b. UE 102b may receive downlink beamformed signals from RU 106b based on a second communication beam set 134b in one or more receive directions of UE 102b. In a further example, UE 102b may also transmit uplink beamformed signals to RU 106b based on a second communication beam set 134b in one or more transmit directions of UE 102b. RU 106b may receive uplink beamformed signals from UE 102b in one or more receive directions of RU 106b.

[0037] UE 102b may perform beam training to determine optimal reception and transmission directions for beamformed signals. The transmission and reception directions of UE 102 and base station 104 / RU 106 may be the same or different. In a further example, beamformed signals may be transmitted between a first base station / RU 106a and a second base station 104e. For example, base station 104e of cell 190e may transmit beamformed signals to RU 106a based on communication beam 138 in one or more transmit directions of base station 104e. RU 106a may receive beamformed signals from base station 104e of cell 190e based on RU communication beam 136 in one or more receive directions of RU 106a. In a further example, base station 104e transmits downlink beamformed signals to UE 102e based on communication beam 138 in one or more transmit directions of base station 104e. The UE 102e receives downlink beamformed signals from the base station 104e in one or more receive directions of the UE 102e based on the UE communication beam 130. The UE 102e may also transmit uplink beamformed signals to the base station 104e in one or more transmit directions of the UE 102e based on the UE communication beam 130, so that the base station 104e can receive the uplink beamformed signals from the UE 102e in one or more receive directions of the base station 104e.

[0038] The base station 104 may include and / or be referred to as a network entity. That is, a “network entity” may refer to the base station 104 or at least one unit of the base station 104, such as the RU 106, the DU 108, and / or the CU 110. The base station 104 may also include and / or be referred to as a next generation evolved Node B (ng-eNB), a first generation NB (gNB), an evolved NB (eNB), an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a TRP, a network node, a network device, or other related terms. The base station 104 or an entity at the base station 104 may be implemented as an IAB node, a relay node, a sidelink node, a converged (monolithic) base station having the RU 106 and the BBU 112 including the DU 108 and the CU 110, or as a decomposed base station including one or more RUs 106, DUs 108, and / or CUs 110. A converged or disaggregated set of base stations may be referred to as a next generation radio access network (NG-RAN). In some examples, UE 102a operates in dual connectivity (DC) with base station 104e and base station / RU 106a. In such a case, base station 104e may be the primary node, while base station / RU 160a may be the secondary node.

[0039] Uplink / downlink signaling may also be communicated via a satellite positioning system (SPS) 114. In an example, the SPS 114 of cell 190c may communicate with one or more UEs 102 (such as UE 102c) and one or more base stations 104 / RUs 106 (such as RU 106c). The SPS 114 may correspond to one or more of a global navigation satellite system (GNSS), a global positioning system (GPS), a non-terrestrial network (NTN), or other satellite positioning / location systems. The SPS 114 may be associated with LTE signals, NR signals (e.g., based on round-trip time (RTT) and / or multiple RTTs), wireless local area network (WLAN) signals, a terrestrial beacon system (TBS), sensor-based information, NR enhanced cell ID (NR E-CID) technology, downlink angle of departure (DL-AoD), downlink time difference of arrival (DL-TDOA), uplink time difference of arrival (UL-TDOA), uplink angle of arrival (UL-AoA), and / or other systems, signals, or sensors.

[0040] Still refer to Figure 1In certain aspects, any of the UEs 102 can include a CSI prediction component 140 configured to perform CSI prediction for one or more future time slots based on measurements of a CSI reference signal (CSI-RS) on a CSI-RS resource. The CSI prediction component 140 is further configured to send the CSI prediction for the one or more future time slots to a network entity.

[0041] In certain aspects, any of the base stations 104 or a network entity of the base station 104 can include a report configuration component 150 configured to configure at least one CSI report with a CSI prediction based on a CSI-RS resource. The report configuration component 150 is further configured to receive at least one CSI report with a CSI prediction for one or more future time slots from a UE.

[0042] therefore, Figure 1 A wireless communication system is described that may incorporate aspects of one or more of the other figures described herein, such as Figure 2-Figure 15 Further, although the following description may focus on 5G NR, the concepts described herein may be applicable to other similar areas, such as 5G-Advanced and future versions, LTE, LTE-Advanced (LTE-A), and other wireless technologies such as 6G.

[0043] Network entity 104 uses the CSI report to select a digital precoder for user equipment (UE). Network entity 104 can configure the CSI report via RRC signaling. To measure radio channel characteristics, UE 102 receives the CSI-RS over the CMR. Network entity 104 can also configure the IMR for the UE to measure interference. Using the configured CMR and IMR, the UE measures the CSI-RS and interference.

[0044] Conventionally, the UE performs channel measurements during the CMR / IMR duration and later transmits a CSI report based on those measurements performed in the past. However, shortly after the network entity receives the CSI report and before the next CSI reporting time slot, the CSI may become inaccurate. For example, if the interval between two CSI reports is too large, the network entity transmits a downlink signal based on outdated CSI for at least a portion of the interval, which may result in performance loss in the wireless communication system. In another example, if the interval between two CSI reports is too small, the UE sends unnecessary (e.g., too many / too frequent) CSI reports. In the "too small" case, the UE does not have to send the second CSI report because the first CSI report is still valid. Such unnecessary CSI reports increase system overhead, which may result in performance degradation in the wireless communication system.

[0045] In some examples, UE 102 can predict CSI in future time slots. In this disclosure, the terms "time slot" and "time slot" are used interchangeably. In one example, UE 102 can perform inference based on previously measured CSI to predict CSI in one or more future time slots. Using the predicted CSI for future time slots, the network entity does not need to trigger CSI measurement and reporting in such time slots.

[0046] Figure 2 2 is a signaling diagram 200 illustrating an example of communication between a user equipment (UE) and a network entity for CSI prediction. The network entity 104 may correspond to a base station or a unit of a base station such as a RU 106, a DU 108, a CU 110, etc. Figure 2 , the UE 102 may send 203 a UE capability report indicating at least UE capabilities including whether the UE supports CSI reporting with CSI prediction. For another example, the network entity may receive the UE capabilities from the core network (e.g., Access and Mobility Management Function (AMF)) or another network entity.

[0047] Based on the received UE capabilities, the network entity 104 transmits 204 first control signaling for configuring at least one CSI reporting configuration for CSI reporting with CSI prediction based on at least one CSI-RS resource. The first control signaling may further configure a codebook for CSI reporting. The network entity may transmit the first control signaling via RRC signaling, such as RRCReconfiguration or CSI-ReportConfig. In one example, the first control signaling may further configure at least one parameter for enabling CSI reporting with CSI prediction.

[0048] In some implementations, for semi-persistent CSI-RS and / or CSI reporting or aperiodic CSI-RS and / or CSI reporting, the network entity may transmit second control signaling, such as MAC CE or DCI, to trigger CSI-RS. The network entity may transmit 206 second control signaling to trigger at least one configured CSI-RS resource and / or at least one CSI reporting configuration for CSI reporting with CSI prediction.

[0049] The network entity may then transmit 208 a CSI-RS on at least one CSI-RS resource for a CSI report with a CSI prediction. After receiving the CSI-RS on the at least one CSI-RS resource, the UE may perform 210 CSI measurement and CSI prediction for a CSI reporting slot or a slot after the last symbol of the CSI-RS resource. The UE may then transmit 212 the CSI report with the CSI prediction to the network entity. The network entity 104 may skip 214 triggering a subsequent CSI report or CSI-RS based on the CSI prediction in the CSI report.

[0050] Figure 3 3 is a block diagram illustrating an example of UE behavior regarding CSI reporting with CSI prediction. UE 102 may transmit 303 UE capabilities regarding CSI reporting with CSI prediction. In some examples, UE 102 may transmit 303 UE capabilities regarding CSI reporting with CSI prediction that indicate at least one of: whether the UE supports CSI reporting with CSI prediction, a maximum number of configured CSI-RS resources for CSI reporting with CSI prediction, a maximum number of CSI-RS resources for CSI reporting with CSI prediction in a time slot, a maximum number of configured CSI-RS reporting configurations with CSI prediction, a maximum number of CSI-RS reporting configurations for CSI reporting with CSI prediction in a time slot, a maximum number of predicted CSI for further time slots, a supported time slot offset between a last measured time slot and a first predicted time slot, and a supported time slot offset between each predicted time slot.

[0051] The UE 102 may receive 304 first control signaling that configures at least one CSI reporting configuration for CSI reporting with CSI prediction based on at least one CSI-RS resource. The first control signaling may further configure a codebook for CSI reporting. The UE 102 may receive 304 the first control signaling via RRC signaling (e.g., RRCReconfiguration or CSI-ReportConfig). In one example, the first control signaling may further configure at least one parameter for enabling CSI reporting with CSI prediction.

[0052] In some implementations, for semi-persistent CSI-RS and / or CSI reporting or aperiodic CSI-RS and / or CSI reporting, the UE 102 may receive 306 second control signaling, such as a MAC CE or DCI, that triggers CSI-RS. The UE 102 may receive 306 second control signaling that triggers the configured at least one CSI-RS resource and / or CSI reporting configuration for CSI reporting with CSI prediction.

[0053] The UE 102 may then receive 308 a CSI-RS on at least one CSI-RS resource for a CSI report with CSI prediction. After receiving the CSI-RS on the at least one CSI-RS resource, the UE may perform 310 CSI prediction for a CSI reporting slot or a slot after the last symbol of the CSI-RS resource based on the CSI measurement on the at least one CSI-RS resource. The UE may then transmit 312 the CSI report with the CSI prediction to a network entity. For example, the UE may transmit 312 a CSI report with CSI for a CSI reporting slot or a slot after the last CSI measurement slot.

[0054] Figure 4 is a block diagram illustrating an example of network entity behavior with respect to CSI reporting with CSI prediction. Figure 4 , the network entity 104 may receive 403 a UE capability report indicating at least UE capabilities including whether the UE supports CSI reporting with CSI prediction. For another example, the network entity may receive the UE capabilities from a core network (e.g., an access and mobility management function (AMF)) or another network entity.

[0055] Based on the received UE capabilities, the network entity 104 transmits 404 first control signaling that configures at least one CSI reporting configuration for CSI reporting with CSI prediction based on at least one CSI-RS resource. The first control signaling may further configure a codebook for CSI reporting. The network entity 104 may transmit the first control signaling via RRC signaling (e.g., RRCReconfiguration or CSI-ReportConfig). In one example, the first control signaling may further configure at least one parameter for enabling CSI reporting with CSI prediction.

[0056] In some implementations, for semi-persistent CSI-RS and / or CSI reporting or aperiodic CSI-RS and / or CSI reporting, the network entity may transmit second control signaling, such as MAC CE or DCI, to trigger CSI-RS. The network entity 104 may transmit 406 second control signaling to trigger at least one configured CSI-RS resource and / or at least one CSI reporting configuration for CSI reporting with CSI prediction.

[0057] The network entity may then transmit 408 a CSI-RS on at least one CSI-RS resource for a CSI report with a CSI prediction. The network entity 104 may receive 412 a CSI report with a CSI prediction for a CSI reporting time slot or a time slot after the last CSI measurement time slot. The network entity 104 may then skip 414 triggering a subsequent CSI report or CSI-RS based on the CSI prediction in the at least one CSI report.

[0058] Figure 5 is a block diagram illustrating an example of CSI reporting with CSI prediction. The UE reports CSI for future time slots based on measurements of one or more CSI-RS instances for a CSI-RS resource. The UE does not need to report CSI in future time slots. For example, the UE measures one or more CSI-RS instances on a CSI-RS resource. The UE uses machine learning to predict parameters of CSI for one or more future time slots after the CSI reporting time slot or the last CSI measurement time slot. The CSI parameters may include at least one of a rank indicator (RI), a precoder matrix indicator (PMI), a channel quality indicator (CQI), and a layer indicator (LI).

[0059] refer to Figure 5 , the UE measures one or more instances of CSI-RS on the CSI-RS resource (e.g., CSI-RS instances 508A, 508B, 508C). The UE predicts parameters of CSI for future time slots, for example, by using machine learning. Future time slots may include the CSI reporting time slot 531 or the time slot after the last CSI measurement time slot 508C. Figure 5 As shown, the future time slots may include a time slot 532 for the UE to send a second CSI report and a time slot 533 for the UE to send a third CSI report. The UE predicts CSI for the future time slots 532 and 533 and sends the CSI predictions for the future time slots 532 and 533. Based on the CSI predictions for the future time slots 532 and 533, the network entity 104 may skip triggering one or more subsequent CSI-RSs (e.g., CSI-RS instances 508D, 508E) and / or subsequent CSI reports (e.g., (e.g., second CSI report 512B, third CSI report 512C)).

[0060] In this way, the network entity avoids triggering the CSI measurement and reporting process in one or more future time slots. As a result, the UE does not have to measure CSI and does not send CSI reports that provide little useful information, thereby saving UE and network resources and also improving system performance.

[0061] The network entity may configure a CSI reporting configuration with CSI prediction based on a Type 1 codebook, a Type 2 codebook, or an eType 2 codebook. Different CSI reporting configurations will be discussed below.

[0062] In some examples, the network entity configures a CSI reporting configuration with CSI prediction based on a Type 1 codebook via first control signaling, such as RRC signaling. The Type 1 codebook is defined in Section 5.2.2.2.1 of 3GPP TS 38.314. The network entity may further configure, via the first control signaling and / or the second control signaling, a codebook subset restriction for the UE to search for an encoder within the configured codebook subset.

[0063] In some examples, for CSI-RS resources, the UE reports more than one PMI for future time slots and reports other elements such as RI, CQI and / or LI measured in one time slot, for example, the first predicted time slot. In the present disclosure, "A / B" indicates "A and / or B". In some other implementations, for CSI-RS resources, the UE reports more than one PMI and RI for future time slots and reports other elements such as CQI and / or LI measured in one time slot, for example, the first predicted time slot. In some other implementations, for CSI-RS resources, the UE reports more than one PMI and CQI for future time slots and reports other elements such as RI and / or LI measured in one time slot, for example, the first predicted time slot. In some other implementations, for CSI-RS resources, the UE reports more than one CSI, such as more than one RI, CQI, PMI and / or LI for all future time slots. In some other implementations, the network entity may configure the report content for each predicted time slot through the first control signaling and / or the second control signaling.

[0064] If the UE reports multiple CQIs in multiple time slots, in some implementations, the UE may report an absolute wideband CQI for the first predicted time slot and, using the wideband CQI as a reference, report differential subband CQIs for each subband in the first predicted time slot and other time slots. In some implementations, the UE may report an absolute average wideband CQI across all predicted time slots and, using the average wideband CQI as a reference, report differential subband CQIs for each subband in all time slots. In some other implementations, the UE may report an absolute wideband CQI for the first predicted time slot and, using the wideband CQI as a reference, report differential subband CQIs for each subband in the first predicted time slot, as well as differential wideband CQIs and subband CQIs for other predicted time slots. In some other implementations, the UE may report an absolute average wideband CQI across all predicted time slots and use the average wideband CQI as a reference to report differential wideband CQI and subband CQI for all predicted time slots. In some other implementations, the UE may report an absolute wideband CQI for each predicted time slot and use the reported wideband CQI for the time slot as a reference to report differential subband CQI for each subband for each predicted time slot.

[0065] In some examples, the UE may report a common set of CRIs for all predicted time slots. In some other implementations, the UE may report a separate CRI for each predicted time slot.

[0066] In some examples, in addition to the CSI report with CSI prediction, the UE may also transmit at least one CSI report without CSI prediction, for example, based on CSI measured by a CSI-RS before a minimum preparation delay for CSI reporting before a CSI reporting slot. In some other examples, the UE may only transmit the CSI report with CSI prediction. In some other examples, in addition to the CSI report with CSI prediction, the network entity further configures whether to transmit at least one CSI report without CSI prediction through the first and / or second control signaling.

[0067] In some examples, the network entity configures time information for CSI prediction via first and / or second control signaling, including at least one of the following parameters: a time slot index of a first CSI prediction time slot, e.g., a time slot offset between the first CSI prediction time slot and a CSI reporting time slot; a time slot offset between each CSI prediction time slot; and the number of CSI prediction time slots.

[0068] In some other examples, the UE reports time information for CSI prediction, including at least one of the following elements: a time slot index of the first CSI prediction time slot, for example, a time slot offset between the first CSI prediction time slot and the CSI reporting time slot; a time slot offset between each CSI prediction time slot; and the number of CSI prediction time slots in the CSI report.

[0069] Figure 6 is a block diagram illustrating an example of prioritization of CSI reporting with CSI prediction in a full CSI report based on a Type 1 codebook. In some examples, the UE reports CSI for the predicted slot based on the configured codebook and / or codebook subset restriction. For each CSI prediction slot, the UE reports complete precoder information, such as wideband precoder information X1 and wideband / subband precoder information X2, where X1 and X2 are defined in 38.212, Section 6.3.1.1.2.

[0070] The UE transmits PMIs based on a priority order, and if the total payload size of all CSI reports configured or triggered to be reported in the Physical Uplink Shared Channel (PUSCH) exceeds the maximum payload size of CSI reports in the PUSCH, the UE may discard PMIs with lower priorities. The UE may be triggered to report one or more CSI reports in a single PUSCH. Different CSI reports may correspond to different CSI reporting configurations. The UE may determine the priority of the reported PMIs based on at least one of the following factors: whether the PMI is a wideband PMI or a subband PMI, the subband index of the PMI, and the predicted time slot index of the PMI. The UE may transmit the PMIs based on a frequency-domain first order, for example, the UE first transmits the PMI for each subband in the predicted time slot, and then transmits the PMI for each subband for the next predicted time slot; or transmit the PMIs based on a time-domain first order, for example, the UE transmits the PMI in the first subband in the predicted time slot, and then transmits the PMI for the second subband in the predicted time slot.

[0071] In some implementations, the UE reports the predicted CSI in a short PUCCH, e.g., a PUCCH with less than or equal to 4 symbols. In some other implementations, the UE reports the predicted CSI in a long PUCCH or PUSCH, e.g., a PUCCH with more than 4 symbols. The UE may report the predicted CRI, RI, and / or CQI for the first codeword in CSI Part 1 and the predicted PMI and / or CQI for the second codeword in CSI Part 2.

[0072] refer to Figure 6In some examples, if the network entity configures the UE to report the wideband PMI and / or subband PMI for each predicted time slot, the UE transmits the wideband PMI and / or subband PMI for the first predicted time slot for all configured or triggered CSI reports with a first priority 611A. Then, the UE transmits the wideband PMI and / or subband PMI for even-numbered predicted time slot indexes within the predicted time slot for CSI report 1 with a second priority 611B, and the UE transmits the wideband PMI and / or subband PMI for odd-numbered predicted time slot indexes within the predicted time slot for CSI report 1 with a third priority 611C, and so on. The UE transmits the wideband PMI and / or subband PMI of the even-numbered predicted time slot index within the predicted time slot for CSI report N with priority 611D, and the UE transmits the wideband PMI and / or subband PMI of the odd-numbered predicted time slot index within the predicted time slot for CSI report N with priority 611E lower than priority 611D.

[0073] like Figure 6 As shown, as an example, if the UE transmits predicted CSI for time slots {4, 8, 12, 20, 24}, the UE transmits CSI for time slot 4 (first predicted time slot) with a first priority 611A, transmits CSI for time slots 8 and 20 (even-numbered predicted time slot indices) with a second priority 611B, and transmits CSI for time slots 12 and 24 (odd-numbered predicted time slot indices) with a third priority 611C.

[0074] Figure 7 is a block diagram illustrating another example of prioritization of CSI reports with CSI prediction in a full CSI report based on a Type 1 codebook. In some examples, if a network entity configures a UE to report wideband PMI and / or subband PMI for each predicted time slot, the UE transmits the wideband PMI and / or subband PMI for the first predicted time slot for the entire CSI report at a first priority 711A. The UE then transmits the wideband PMI and / or subband PMI for the first half of the predicted time slot for CSI report 1 at a second priority 711B, and the UE transmits the wideband PMI and / or subband PMI for the remaining time slots for CSI report 1 at a third priority 711C, and so on. The UE transmits the wideband PMI and / or subband PMI for the first half of the predicted time slot for CSI report N at a priority 711D, and the UE transmits the wideband PMI and / or subband PMI for the remaining time slots for CSI report N at a lower priority 711E.

[0075] refer to Figure 7As an example, if the UE transmits predicted CSI for time slots {4, 8, 12, 20, 24}, the UE transmits CSI for time slot 4 (the first predicted time slot) with a first priority 711A, transmits CSI for time slots 8 and 12 (the first half of the predicted time slots) with a second priority 711B, and transmits CSI for time slots 20 and 24 (the remaining time slots) with a third priority 711C.

[0076] Figure 8 is a block diagram illustrating another example of prioritization of CSI reports with CSI prediction in a full CSI report based on a Type 1 codebook. In some examples, if a network entity configures a UE to report subband PMIs for each predicted time slot, the UE transmits the subband PMIs for all predicted time slots for all CSI reports at a first priority 811A. The UE then transmits the subband PMIs for even subbands for all predicted time slots for CSI report 1 at a second priority 811B, and the UE transmits the subband PMIs for odd subbands for all predicted time slots for CSI report 1 at a third priority 811C, and so on. The UE transmits the subband PMIs for even subbands for all predicted time slots for CSI report N at a priority 811D, and the UE transmits the subband PMIs for odd subbands for all predicted time slots for CSI report N at a lower priority 811E than the first priority 711D, and so on.

[0077] Figures 6 to 8 A CSI reporting configuration with CSI prediction for full CSI reporting based on Type 1 codebook is shown. In full CSI reporting, for each CSI prediction slot, the UE reports complete precoder information. Alternatively, the UE can report partial CSI reporting based on Type 1 codebook.

[0078] In some examples, the UE reports CSI for a first predicted time slot based on a configured codebook and / or codebook subset restriction, and the UE reports CSI for other predicted time slots based on the reported CSI for the first predicted time slot and the configured codebook and / or codebook subset restriction. For the first CSI prediction time slot, the UE reports complete precoder information, such as wideband precoder information X1 and wideband / subband precoder information X2, where X1 and X2 are defined in 3GPP TS 38.212 Section 6.3.1.1.2. For another CSI prediction time slot, the UE reports partial precoder information, such as precoder information X2. The network entity can then reconstruct the reported precoder for the other CSI prediction time slot based on the received precoder information for the first predicted time slot and the partial precoder information for the other CSI prediction time slot. Compared with the full CSI report, the difference is that in the partial CSI report, the UE only reports one full precoder information for the first CSI predicted time slot and multiple partial precoder information for multiple other predicted time slots.

[0079] In some implementations, the UE reports partial precoder information for both the wideband precoder and the subband precoder for predicted time slots other than the first predicted time slot, e.g., precoder information X2. In some other implementations, the UE reports partial precoder information for the subband precoder only for predicted time slots other than the first predicted time slot, e.g., precoder information X2.

[0080] In some other implementations, the UE reports common wideband precoder information for all predicted time slots, such as precoder information X1, and the UE reports subband precoder information for each subband for all predicted time slots, such as precoder information X2.

[0081] In some examples, the network entity configures the UE through first control signaling or second control signaling to report the predicted CSI for each CSI prediction time slot based on the full CSI or the partial CSI.

[0082] In some examples, the network entity and the UE determine whether to report the predicted CSI for each CSI prediction time slot based on full CSI or partial CSI based on an offset between each two predicted time slots and a threshold. If the offset is higher than the threshold, the UE reports the predicted CSI for each CSI prediction time slot based on full CSI reporting; otherwise, the UE reports the predicted CSI for each CSI prediction time slot based on partial CSI reporting. The threshold can be predefined or configured by the network entity through first control signaling or second control signaling, or reported by the UE via a UE capability report.

[0083] In some examples, the UE reports an indicator indicating whether the predicted CSI for each CSI prediction time slot is based on full CSI or partial CSI. In some implementations, the UE reports this indicator in a CSI report, such as CSI Part 1. In some other implementations, the UE reports this indicator via a UE capability report.

[0084] A network entity may configure a CSI reporting configuration with CSI prediction based on a Type 2 or eType 2 codebook. In some examples, the network entity configures the CSI reporting configuration with CSI prediction based on a Type 2 or eType 2 codebook via first control signaling, such as RRC signaling. The Type 2 and eType 2 codebooks are defined in 3GPP TS 38.214, Sections 5.2.2.2.3 / 4 / 5 / 6. The UE may report the PMI based on the configured Type 2 or eType 2 codebook.

[0085] As an example, the UE reports complete precoder information for each predicted time slot based on the Type2 / eType2 codebook. For each CSI prediction time slot, the UE reports complete precoder information, such as wideband precoder information X1 and wideband / subband precoder information X2, where X1 and X2 are defined in 3GPP TS 38.212 Section 6.3.1.2.2.

[0086] For CSI reporting based on Type 2 codebook, UE can Figures 6 to 8 The UE transmits Type 2 CSI using the same priority rules as shown. The UE transmits first precoder information X1 and second precoder information X2 indicating the beam index to identify the matrix W1 and the beam combining vector for each subband W2, respectively. The network entity can reconstruct the precoder for each subband based on the following:

[0087] In one example, the codebook for W1 selection can be defined as follows:

[0088] in, represents the Kronecker product; L indicates the number of beams configured by RRC signaling; N1, N2, O1, and O2 are related to the number of ports and oversampling factors configured by RRC signaling in the horizontal and vertical domains, and candidate values ​​should be determined based on the number of CSI-RS ports. The codebook contains precoders with different values ​​for m and n. In one example, the candidate values ​​are defined as Table 5.2.2.2.1-2 in 3GPP TS 38.214.

[0089] The UE transmits PMIs based on the order of priority, and if the payload size of the CSI report exceeds the maximum payload size of the CSI report, the UE may discard PMIs with lower priority.

[0090] For the eType2 codebook, the UE may determine the priority of the reported precoder information based on at least one of the following factors: an indication of the precoder information, e.g., whether it is for precoder information X1 or precoder information X2; the priority of the precoder information; and the predicted slot index of the precoder information.

[0091] Figure 9 is a block diagram illustrating an example of the priority of CSI reporting based on the eType2 codebook with CSI prediction. Figure 9 In some examples, if the network entity configures the UE to report the predicted CSI based on the eType2 codebook, the UE transmits the wideband precoder information X1 and / or subband precoder information X2 for the first predicted time slot of all CSI reports with a first priority 911A. Then, the UE transmits the wideband precoder information X1 and / or subband precoder information X2 for the even-numbered predicted time slot indexes within the predicted time slots of CSI report 1 with a second priority 911B, and the UE transmits the wideband precoder information X1 and / or subband precoder information X2 for the odd-numbered predicted time slot indexes within the predicted time slots of CSI report 1 with a third priority 911C, and so on. The UE transmits the broadband precoder information X1 and / or subband precoder information X2 for the even-numbered predicted time slot index within the predicted time slot for CSI report N with priority 911D, and the UE transmits the broadband precoder information X1 and / or subband precoder information X2 for the odd-numbered predicted time slot index within the predicted time slot for CSI report N with priority 911E lower than priority 911D, and so on.

[0092] In one example, if the UE transmits predicted CSI for time slots {4, 8, 12, 20, 24}, the UE transmits CSI for time slot 4 with a first priority 911A, transmits CSI for time slots 8 and 20 with a second priority 911B, and transmits CSI for time slots 12 and 24 with a third priority 911C.

[0093] Figure 10 is a block diagram illustrating another example of the priority of CSI reporting based on the eType2 codebook with CSI prediction. Figure 10 In some examples, if the network entity configures the UE to report predicted CSI based on the eType2 codebook, the UE transmits wideband precoder information X1 and / or subband precoder information X2 for the first predicted time slot of all CSI reports at a first priority 1011A. Then, the UE transmits wideband precoder information X1 and / or subband precoder information X2 for the first half of the predicted time slot of CSI report 1 at a second priority 1011B, and the UE transmits wideband precoder information X1 and / or subband precoder information X2 for the remaining time slots of CSI report 1 at a third priority 1011C, and so on. The UE transmits wideband precoder information X1 and / or subband precoder information X2 for the first half of the predicted time slot of CSI report N at a priority 1011D, and the UE transmits wideband precoder information X1 and / or subband precoder information X2 for the remaining time slots of CSI report N at a priority 1011E lower than the first priority 1011D, and so on.

[0094] In one example, if the UE transmits predicted CSI for time slots {4, 8, 12, 20, 24}, the UE transmits CSI for time slot 4 with a first priority, CSI for time slots 8 and 12 with a second priority, and CSI for time slots 20 and 24 with a third priority.

[0095] Figure 111 is a block diagram illustrating another example of prioritization for CSI reporting based on an eType2 codebook with CSI prediction. In some examples, if a network entity configures a UE to report predicted CSI based on an eType2 codebook, the UE transmits wideband precoder information X1 for all predicted time slots for all CSI reports at a first priority 1111A. The UE then transmits a high-priority portion of subband precoder information X2 for all predicted time slots for CSI report 1 at a second priority 1111B, and the UE transmits a low-priority portion of subband precoder information X2 for all predicted time slots for CSI report 1 at a third priority 1111C, and so on. The UE transmits a high-priority portion of subband precoder information X2 for all predicted time slots for CSI report N at a priority 1111D, and the UE transmits a low-priority portion of subband precoder information X2 for all predicted time slots for CSI report N at a priority 1111E lower than priority 1111D.

[0096] In some examples, the priority of the subband precoder information X2 can be determined based on the energy of the beam combining coefficients, for example, coefficients with higher energy have higher priority than coefficients with lower energy, where the beam combining coefficients indicate the matrix The wideband precoder information may include an indication of W1 and The network entity can then reconstruct the precoder as follows:

[0097] in, Same as Type 2 codebook, it indicates L space domain basis (SD basis); indicates the beam combining weights having dimensions 2L times M, and Indicates a digital Fourier transform (DFT) based frequency domain basis (FD basis) having dimensions of N3 by M, where N3 is the number of subbands and M is the number of FD basis.

[0098] Figures 9 to 11 The CSI reporting configuration with CSI prediction for full CSI reporting based on Type 2 or eType 2 codebook is shown. In full CSI reporting, the UE reports complete precoder information for each CSI prediction slot. Alternatively, the UE can report partial CSI reporting based on Type 2 or eType 2 codebook.

[0099] In some examples, the UE reports first common precoder information for the CSI of all predicted time slots and second individual precoder information for the CSI of each predicted time slot. In some examples, for a Type 2 based codebook, the UE reports a common set of beam indices indicating a common SD basis W1 for all predicted time slots and reports different beam combining vectors W2 for different predicted time slots.

[0100] In some examples, for a codebook based on eType2, the UE reports a common set of beam indices indicating a common SD basis W1 for all predicted slots, and reports different beam combining vectors W2 and different FD basis W for different predicted slots. f In some other examples, for a codebook based on eType2, the UE reports a common set of beam indices indicating a common SD basis W1 and a common FD basis set Wf for all predicted time slots, and reports different beam combining vectors W2. In some other examples, for a codebook based on eType2, the network entity may configure whether the FD basis should be common for all predicted CSIs through the first control signaling or the second control signaling.

[0101] In some other examples, for codebooks based on eType 2, the UE may report an indicator indicating whether the FD basis should be common to all predicted CSI. The UE may transmit the indicator in the CSI, such as CSI part 1. Alternatively, the UE may transmit the indicator via a UE capability report.

[0102] In some examples, the network entity configures the UE through first control signaling or second control signaling to report the predicted CSI for each CSI prediction time slot based on the full CSI or the partial CSI.

[0103] In some examples, the network entity and the UE determine whether to report the predicted CSI for each CSI prediction time slot based on full CSI or partial CSI based on an offset between each two predicted time slots and a threshold. If the offset is higher than the threshold, the UE reports the predicted CSI for each CSI prediction time slot based on full CSI reporting; otherwise, the UE reports the predicted CSI for each CSI prediction time slot based on partial CSI reporting. The threshold can be predefined or configured by the network entity through first control signaling or second control signaling, or reported by the UE via a UE capability report.

[0104] In some examples, the UE reports an indicator indicating whether the predicted CSI for each CSI prediction time slot is based on full CSI or partial CSI. In some implementations, the UE reports this indicator in a CSI report, such as CSI Part 1. In some other implementations, the UE reports this indicator via a UE capability report. Figures 2 to 11 Examples of priority rules for CSI reporting with CSI prediction and CSI reporting configuration with CSI prediction based on Type 1, Type 2, or eType 2 codebooks are shown. Figures 12 to 13 Shown for implementation Figures 2 to 11 Specifically, Figure 12 UE 102 is shown Figures 2 to 11 Implementation of one or more aspects. Figure 13 The network entity 104 is shown Figures 2 to 11 Implementation of one or more aspects.

[0105] Figure 12 A flow chart 1200 of a wireless communication method at a UE is shown. Figure 1 and Figure 14 , the method can be performed by UE102, UE equipment 1402, etc., which may include memory 1426', 1406', 1416, and may correspond to the entire UE 102 or the entire UE equipment 1402, or components of the UE 102 or UE equipment 1402 (such as the wireless baseband processor 1426 and / or the application processor 1406).

[0106] The UE 102 may transmit 1203 to a network entity a UE capability report indicating one or more UE capabilities. Figure 3 , the UE 102 may communicate 303 the UE capability regarding CSI reporting with CSI prediction.

[0107] The UE 102 may receive 1204 first control signaling to configure at least one CSI report with CSI prediction based on the CSI-RS resource. Figure 3 , the UE 102 may receive 304 first control signaling to configure at least one CSI reporting configuration for CSI reporting with CSI prediction based on at least one CSI-RS resource.

[0108] The UE 102 may receive 1206 from the network entity a second control signaling that triggers at least one of: at least one CSI report with CSI prediction, or CSI-RS resources for CSI prediction. Figure 3In the embodiment, the UE 102 may receive 306 second control signaling triggering the configured at least one CSI-RS resource and / or CSI reporting configuration for CSI reporting with CSI prediction.

[0109] UE 102 receives 1208 the CSI-RS on the CSI-RS resource. Figure 3 , the UE 102 may receive 308 a CSI-RS on at least one CSI-RS resource for a CSI report with CSI prediction.

[0110] The UE 102 performs 1210 CSI prediction for one or more future time slots based on the measurement of the CSI-RS on the CSI-RS resource. Figure 3 , the UE may perform 310 CSI prediction for a CSI reporting slot or a slot after the last symbol of a CSI-RS resource based on CSI measurements on at least one CSI-RS resource.

[0111] UE 102 sends 1212 to the network entity at least one CSI report with CSI predictions for one or more future time slots. Figure 3 , the UE transmits 312 a CSI report with a CSI prediction to the network entity. For example, the UE may transmit 312 a CSI report with CSI for a CSI reporting time slot or a time slot after the last CSI measurement time slot. Figure 12 A method is described from the UE side of a wireless communication link, and Figure 13 A method is described from the network side of a wireless communication link.

[0112] Figure 13 1300 is a flow chart of a method of wireless communication at a network entity. Figure 1 and Figure 15 The method may be performed by one or more network entities 104, which may correspond to a base station or a unit of a base station, such as the RU 106, the DU 108, the CU 110, the RU processor 1506, the DU processor 1526, the CU processor 1546, etc. The one or more network entities 104 may include a memory 1506' / 1526' / 1546', which may correspond to the entirety of the one or more network entities 104 or a component of the one or more network entities 104, such as the RU processor 1506, the DU processor 1526, or the CU processor 1546.

[0113] The network entity 104 may receive 1303 a UE capability report from the UE indicating one or more UE capabilities. Figure 4, the network entity 104 may receive 403 an indication of a UE capability report including at least UE capabilities including whether the UE supports CSI reporting with CSI prediction.

[0114] The network entity 104 configures 1304 at least one CSI report with CSI prediction based on the CSI-RS resources. Figure 4 , the network entity 104 transmits 404 first control signaling for configuring at least one CSI reporting configuration for CSI reporting with CSI prediction based on at least one CSI-RS resource.

[0115] The network entity 104 may transmit 1306 to the UE a second control signaling that triggers at least one of: at least one CSI report with CSI prediction, or CSI-RS resources for CSI prediction. Figure 4 , the network entity 104 may transmit 406 second control signaling triggering the configured at least one CSI-RS resource and / or at least one CSI reporting configuration for CSI reporting with CSI prediction.

[0116] The network entity 104 receives 1312 from the UE at least one CSI report with CSI predictions for one or more future time slots. Figure 4 , the network entity 104 receives 412 a CSI report with a CSI prediction for a CSI reporting time slot or a time slot after the last CSI measurement time slot.

[0117] The network entity 104 may skip 1314 triggering subsequent CSI reports or CSI-RS based on the CSI prediction in the at least one CSI report. Figure 4 In the embodiment, the network entity 104 may skip 414 triggering subsequent CSI reports or CSI-RS based on the CSI prediction in the at least one CSI report. Figure 14 The described UE equipment 1402 can perform the method of flowchart 1200. Figure 15 As described in , one or more network entities 104 may perform the method of flowchart 1300 .

[0118] Figure 1414 is a diagram illustrating an example of a hardware implementation of a UE device 1402. The UE device 1402 may be the UE 102, a component of the UE 102, or may implement UE functionality. The UE device 1402 may include an application processor 1406, which may have on-chip memory 1406′. In an example, the application processor 1406 may be coupled to a secure digital (SD) card 1408 and / or a display 1410. The application processor 1406 may also be coupled to a sensor module 1412, a power supply 1414, an additional memory module 1416, a camera 1418, and / or other related components. For example, the sensor module 1412 may control a barometric pressure sensor / altimeter, a motion sensor (such as an inertial management unit (IMU), a gyroscope, an accelerometer), a light detection and ranging (LIDAR) device, a radio-aided detection and ranging (RADAR) device, a sound navigation and ranging (SONAR) device, a magnetometer, an audio device, and / or other technologies for positioning.

[0119] UE equipment 1402 may further include a wireless baseband processor 1426, which may be referred to as a modem. Wireless baseband processor 1426 may have on-chip memory 1426'. Like and similar to application processor 1406, wireless baseband processor 1426 may also be coupled to sensor module 1412, power supply 1414, additional memory module 1416, camera 1418, and / or other related components. Wireless baseband processor 1426 may also be coupled to one or more subscriber identity module (SIM) cards 1420 and / or one or more transceivers 1430 (e.g., wireless RF transceivers).

[0120] Within one or more transceivers 1430, the UE equipment 1402 may include a Bluetooth module 1432, a WLAN module 1434, an SPS module 1436 (e.g., a GNSS module), and / or a cellular module 1438. The Bluetooth module 1432, the WLAN module 1434, the SPS module 1436, and the cellular module 1438 may each include an on-chip transceiver (TRX), or in some cases, only a transmitter (TX) or only a receiver (RX). The Bluetooth module 1432, the WLAN module 1434, the SPS module 1436, and the cellular module 1438 may each include a dedicated antenna and / or utilize an antenna 1440 to communicate with one or more other nodes. For example, the UE equipment 1402 can communicate with another UE 102 (e.g., sidelink communication) and / or communicate with a network entity 104 (e.g., uplink / downlink communication) via the antenna 1440 via the transceiver 1430, where the network entity 104 can correspond to a base station or a unit of a base station, such as RU 106, DU 108 or CU 110.

[0121] The wireless baseband processor 1426 and the application processor 1406 may each include a computer-readable medium / memory 1426′, 1406′, respectively. The additional memory module 1416 may also be considered a computer-readable medium / memory. Each computer-readable medium / memory 1426′, 1406′, 1416 may be non-transitory. The wireless baseband processor 1426 and the application processor 1406 may each be responsible for general processing, including executing software stored on the computer-readable medium / memory 1426′, 1406′, 1416. This software, when executed by the wireless baseband processor 1426 / application processor 1406, enables the wireless baseband processor 1426 / application processor 1406 to perform the various functions described herein. The computer-readable medium / memory may also be used to store data manipulated by the wireless baseband processor 1426 / application processor 1406 when executing the software. The wireless baseband processor 1426 / application processor 1406 may be a component of the UE 102. UE equipment 1402 may be a processor chip (e.g., modem and / or applications) and include only the wireless baseband processor 1426 and / or the application processor 1406. In other examples, UE equipment 1402 may be the entire UE 102 and include additional modules of the equipment 1402.

[0122] like Figure 1 Discussed in and about Figure 12 As implemented, the CSI prediction component 140 is configured to perform CSI prediction for one or more future time slots based on measurements of CSI reference signals (CSI-RS) on CSI-RS resources. The CSI prediction component 140 is further configured to send the CSI prediction for the one or more future time slots to a network entity. The CSI prediction component 140 can be located within the application processor 1406 (e.g., at 140a), within the radio baseband processor 1426 (e.g., at 140b), or within both the application processor 1406 and the radio baseband processor 1426. Components 140a-140b can be one or more hardware components specifically configured to perform the recited processes / algorithms, implemented by one or more processors configured to perform the recited processes / algorithms, stored on computer-readable media for implementation by one or more processors, or a combination thereof.

[0123] Figure 15FIG15 is a diagram illustrating an example of a hardware implementation of one or more network entities 104. The one or more network entities 104 may be a base station, a component of a base station, or may implement base station functionality. The one or more network entities 104 may include or may correspond to at least one of a RU 106, a DU 108, or a CU 110. The CU 110 may include a CU processor 1546, which may have on-chip memory 1546′. In some aspects, the CU 110 may further include an additional memory module 1556 and / or a communication interface 1548, both of which may be coupled to the CU processor 1546. The CU 110 may communicate with the DU 108 via a midhaul link 162, such as an F1 interface between the communication interface 1548 of the CU 110 and the communication interface 1528 of the DU 108.

[0124] The DU 108 may include a DU processor 1526, which may have on-chip memory 1526'. In some aspects, the DU 108 may further include an additional memory module 1536 and / or a communication interface 1528, both of which may be coupled to the DU processor 1526. The DU 108 may communicate with the RU 106 via a fronthaul link 160 between the communication interface 1528 of the DU 108 and the communication interface 1508 of the RU 106.

[0125] The RU 106 may include a RU processor 1506, which may have on-chip memory 1506'. In some aspects, the RU 106 may further include an additional memory module 1516, a communication interface 1508, and one or more transceivers 1530, all of which may be coupled to the RU processor 1506. The RU 106 may further include an antenna 1540, which may be coupled to the one or more transceivers 1530, such that the RU 106 may communicate with the UE 102 via the antenna 1540 through the one or more transceivers 1530.

[0126] On-chip memory 1506', 1526', 1546' and additional memory modules 1516, 1536, 1556 can each be considered a computer-readable medium / memory. Each computer-readable medium / memory can be non-transitory. Each of processors 1506, 1526, 1546 is responsible for general processing, including executing software stored on the computer-readable medium / memory. The software, when executed by the corresponding processor 1506, 1526, 1546, causes the processor 1506, 1526, 1546 to perform the various functions described herein. The computer-readable medium / memory can also be used to store data manipulated by the processor 1506, 1526, 1546 when executing the software. In an example, the configuration reporting component 150 can be located at any of the one or more network entities 104, such as at the CU 110; at both the CU 110 and the DU 108; at each of the CU 110, DU 108, and RU 106; at the DU 108; at both the DU 108 and the RU 106; or at the RU 106.

[0127] As in Figure 1 Discussed in and about Figure 13 As implemented, report configuration component 150 is configured to configure at least one CSI report with CSI predictions based on CSI-RS resources. Report configuration component 150 is further configured to receive at least one CSI report with CSI predictions for one or more future time slots from a UE. Report configuration component 150 may be within one or more processors of one or more network entities 104, such as RU processor 1506 (e.g., at 150a), DU processor 1526 (e.g., at 150b), and / or CU processor 1546 (e.g., at 150c). Report configuration components 150a-150c may be one or more hardware components specifically configured to perform the recited processes / algorithms, implemented by one or more processors 1506, 1526, 1546 configured to perform the recited processes / algorithms, stored on a computer-readable medium for implementation by one or more processors 1506, 1526, 1546, or a combination thereof.

[0128] The specific order or hierarchy of blocks in the processes and flowcharts disclosed herein is illustrative of example methods. Therefore, the specific order or hierarchy of blocks in the processes and flowcharts may be rearranged. Some blocks may also be combined or deleted. Dashed lines may indicate optional elements of a diagram. The accompanying method claims present elements of each block in an example order and are not limited to the specific order or hierarchy presented in the claims, processes, and flowcharts.

[0129] The detailed description set forth herein, in conjunction with the accompanying drawings, describes various configurations and does not represent the only configuration in which the concepts described herein may be practiced. The detailed description includes specific details to provide a comprehensive explanation of the various concepts. However, these concepts may be practiced without using these specific details. In some cases, well-known structures and components are shown in block diagram form to avoid obscuring such concepts.

[0130] Various aspects of wireless communication systems (such as telecommunication systems) are presented with reference to various apparatus and methods. These apparatus and methods are described in the detailed description that follows and are illustrated in the accompanying drawings by various blocks, components, circuits, processes, call flows, systems, algorithms, etc. (collectively, "elements"). These elements can be implemented using electronic hardware, computer software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and design constraints imposed on the overall system.

[0131] Element, or any part of an element or any combination of elements can be implemented as a "processing system" including one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gating logic, discrete hardware circuits, and other similar hardware configured to perform the various functions described throughout this disclosure. One or more processors in a processing system can execute software, which can be referred to as software, firmware, middleware, microcode, hardware description language, or other. Software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executables, execution threads, processes, functions, or any combination thereof.

[0132] If the functions described herein are implemented in software, these functions may be stored on a computer-readable medium (such as a non-transitory computer-readable storage medium) or encoded as one or more instructions or codes on the computer-readable medium. Computer-readable media include computer storage media and may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of these types of computer-readable media, or any other medium that can be used to store computer-executable code in the form of computer-accessible instructions or data structures. The storage medium can be any available medium that is accessible to the computer.

[0133] The various aspects, implementations, and / or use cases described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, the various aspects, implementations, and / or use cases can be generated via integrated chip implementations and other non-module component-based devices such as end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / procurement devices, medical devices, artificial intelligence (AI)-enabled devices, machine learning (ML)-enabled devices, and the like. The various aspects, implementations, and / or use cases can range from chip-level or modular components to non-modular or non-chip-level implementations, and further to aggregated, distributed, or original equipment manufacturer (OEM) devices or systems incorporating one or more of the techniques described herein.

[0134] Devices incorporating aspects and features described herein may also include additional components and features for implementing and practicing the aspects and features claimed and described. For example, the transmission and reception of wireless signals necessarily include many components for analog and digital purposes, such as hardware components, antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / summers, etc. The techniques described herein can be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, aggregated or disaggregated components, end-user devices, etc., in various configurations.

[0135] The description herein is provided to enable those skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. Therefore, the claims are not limited to the various aspects described herein, but should be interpreted in view of the full scope of the disclosure consistent with the language of the claims.

[0136] Unless expressly stated, references to singular elements do not mean "one and only one", but rather "one or more". Terms such as "if", "when" and "at" do not imply an immediate temporal relationship or reaction. That is, these phrases (e.g., "when") do not imply immediate action in response to the occurrence of an action or during the occurrence of an action, but simply mean that if a certain condition is met, a certain action will occur, but no specific or immediate temporal constraint is required for the occurrence of the action. The terms "may", "might" and "can" as used in this disclosure generally carry certain meanings. For example, "may" refers to a permissible feature that may or may not occur, "might" refers to a feature that is likely to occur, and "can" refers to an ability (e.g., to be able to). The phrase "for example" generally carries a similar meaning to "may", and therefore, "may" is sometimes excluded from sentences that include "for example" or other similar phrases.

[0137] Unless expressly stated otherwise, the term "some" refers to one or more. Combinations such as "at least one of A, B, or C" or "one or more of A, B, or C" include any combination of A, B, and / or C, such as A and B, A and C, B and C, or A, B, and C, and may include multiple A's, multiple B's, and / or multiple C's, or may include only A's, only B's, or only C's. A set should be interpreted as a set of elements where the number of elements is one or more.

[0138] Unless otherwise expressly indicated, ordinal terms such as "first" and "second" do not necessarily imply an order in time, sequence, value, etc., but are used to distinguish different instances of the term or phrase following each ordinal term. Figure numerals as used in the specification and drawings are sometimes cross-referenced between the drawings to indicate the same or similar features. Features that are identical in multiple drawings may be labeled with the same figure numerals in the multiple drawings. Features that are similar but not identical across multiple drawings may be labeled with figure numerals having different leading digits but one or more of the same trailing digits (e.g., 206, 306, 406, etc. may refer to similar features in the drawings). Sometimes, "X" is used to generally indicate multiple variations of a feature. For example, "X06" may generally refer to all reference numbers ending in "06" (e.g., 206, 306, 406, etc.).

[0139] The structural equivalents and functional equivalents of the elements of various aspects described in the entire present disclosure that are known or later learned by those of ordinary skill in the art are expressly incorporated herein by reference and are covered by the claims. The words "module", "mechanism", "element", "device" etc. may not be substitutes for the word "component". Therefore, unless the phrase "component for ..." is used to clearly state the claim elements, any claim element shall not be interpreted as a means plus function. As used herein, the phrase "based on" should not be interpreted as a reference to a closed information set, one or more conditions, one or more factors, etc. In other words, unless clearly stated differently, the phrase "based on A" (wherein "A" can be information, condition, factor, etc.) should be interpreted as "at least based on A". The following examples are illustrative only and can be combined with other examples or teachings described herein without limitation.

[0140] Example 1 is a method of wireless communication at a UE, comprising: performing channel state information (CSI) prediction for one or more future time slots based on measurement of a CSI-RS on a channel state information reference signal (CSI-RS) resource; and sending the CSI prediction for the one or more future time slots to a network entity.

[0141] Example 2 may be combined with Example 1 and include sending the CSI prediction for one or more future time slots to the network entity comprising sending at least one CSI report with the CSI prediction for the one or more future time slots to the network entity.

[0142] Example 3 can be combined with any one of Examples 1 to 2, and includes: the one or more future time slots include a CSI reporting slot or one or more future time slots after the last CSI measurement slot, and performing the CSI prediction for the one or more future time slots includes: measuring one or more instances of CSI-RS on the CSI-RS resource; and using machine learning to predict parameters of the CSI for the one or more future time slots after the CSI reporting slot or the last CSI measurement slot.

[0143] Example 4 can be combined with any one of Examples 1 to 3, and further includes: transmitting to a network entity an indication of a UE capability report including one or more UE capabilities of: whether the UE supports CSI reporting with CSI prediction, the maximum number of configured CSI-RS resources for the CSI reporting with CSI prediction, the maximum number of CSI-RS resources for the CSI reporting with CSI prediction in a time slot, the maximum number of configured CSI-RS report configurations with the CSI prediction, the maximum number of CSI-RS report configurations for the CSI reporting with CSI prediction in a time slot, the maximum number of predicted CSI for further time slots, one or more supported time slot offsets between the last measured time slot and the first predicted time slot, or one or more supported time slot offsets between each predicted time slot.

[0144] Example 5 can be combined with any one of Examples 2 to 4 and further include: receiving first control signaling from a network entity to configure at least one CSI report configuration for a CSI report with CSI prediction based on a CSI-RS resource; and receiving the CSI-RS on the CSI-RS resource.

[0145] Example 6 can be combined with Example 5 and include: the CSI report with CSI prediction is configured based on a Type 1 codebook, a Type 2 codebook, or an eType 2 codebook.

[0146] Example 7 can be combined with any one of Examples 5 to 6, and includes: receiving second control signaling from the network entity triggering at least one of the following: at least one CSI report with CSI prediction, or CSI-RS resources for CSI prediction.

[0147] Example 8 can be combined with any one of Examples 2 to 7 and includes: sending at least one CSI report with CSI predictions for one or more future time slots to a network entity includes: transmitting at least one CSI report including a complete CSI parameter set for all one or more future time slots to the network entity.

[0148] Example 9 can be combined with any one of Examples 2 to 7 and includes: sending at least one CSI report with CSI predictions for the one or more future time slots to a network entity includes: transmitting at least one CSI report including all CSI parameters for a first time slot in the one or more future time slots and a portion of CSI parameters for other future time slots in the one or more future time slots to the network entity.

[0149] Example 10 can be combined with any one of Examples 2 to 7 and includes: sending at least one CSI report with CSI predictions for one or more future time slots to a network entity includes: transmitting at least one CSI report including one or more common CSI parameters for all one or more future time slots and one or more differential CSI parameters for each of the one or more future time slots to the network entity.

[0150] Example 11 can be combined with any one of Examples 2 to 10 and includes: sending at least one CSI report with CSI predictions for one or more future time slots to a network entity includes: transmitting to the network entity at least one CSI report including at least one of the following: a time slot offset between a first CSI prediction time slot and a CSI reporting time slot, a time slot offset between each CSI prediction time slot, or a number of CSI prediction time slots in the at least one CSI report.

[0151] Example 12 can be combined with any one of Examples 2 to 11 and includes: determining a priority order of one or more precoder matrix indicators (PMIs) in at least one CSI report based on at least one of the following: whether the PMI is for wideband or subband, the subband index of the PMI, or the predicted time slot index of the PMI.

[0152] Example 13 may be combined with Example 12, and include sending the at least one CSI report with CSI predictions for one or more future time slots to a network entity including transmitting one or more PMIs to the network entity based on a priority order.

[0153] Example 14 is a method of wireless communication at a network entity, comprising: configuring at least one CSI report configuration for a CSI report with CSI prediction based on a CSI-RS resource; and receiving the at least one CSI report with CSI prediction for one or more future time slots from a UE.

[0154] Example 15 may be combined with Example 14, and include: at least one CSI report with CSI prediction is configured based on a Type 1 codebook, a Type 2 codebook, or an eType 2 codebook.

[0155] Example 16 can be combined with any one of Examples 14 to 15, and further include skipping triggering a subsequent CSI report or CSI-RS based on a CSI prediction in at least one CSI report.

[0156] Example 17 is an apparatus for wireless communication for implementing the method of any one of Examples 1 to 16.

[0157] Example 18 is a non-transitory computer-readable medium storing computer-executable code that, when executed by at least one processor, causes the at least one processor to implement the method of any one of Examples 1-16.

Claims

1. A method for wireless communication at a user equipment (UE), comprising: performing channel state information (CSI) prediction for one or more future time slots based on measurements of a channel state information reference signal (CSI-RS) on a CSI resource; as well as The CSI prediction for the one or more future time slots is sent to a network entity.

2. The method according to claim 1, wherein The sending the CSI prediction for the one or more future time slots to the network entity comprises: At least one CSI report with a CSI prediction for the one or more future time slots is sent to the network entity.

3. The method according to any one of claims 1 to 2, wherein The one or more future time slots include one or more future time slots after a CSI reporting time slot or a last CSI measurement time slot, and wherein performing the CSI prediction for the one or more future time slots includes: measuring one or more instances of the CSI-RS on the CSI-RS resource; and Machine learning is used to predict parameters of the CSI for the one or more future time slots after the CSI reporting time slot or the last CSI measurement time slot.

4. The method according to any one of claims 1 to 3, further comprising: and transmitting to the network entity a UE capability report indicating one or more UE capabilities including: whether the UE supports CSI reporting with CSI prediction, a maximum number of configured CSI-RS resources for the CSI reporting with CSI prediction, a maximum number of CSI-RS resources for the CSI reporting with CSI prediction in a time slot, a maximum number of configured CSI-CSI reporting configurations with the CSI prediction, a maximum number of CSI-RS reporting configurations for the CSI reporting with CSI prediction in a time slot, a maximum number of predicted CSI for further time slots, one or more supported time slot offsets between a last measured time slot and a first predicted time slot, or one or more supported time slot offsets between each predicted time slot.

5. The method according to any one of claims 2 to 4, further comprising: receiving, from a network entity, first control signaling of at least one CSI reporting configuration for a CSI report with CSI prediction based on the CSI-RS resource configuration; as well as receiving the CSI-RS on the CSI-RS resource.

6. The method according to claim 5, wherein: The CSI report with the CSI prediction is configured based on a Type 1 codebook, a Type 2 codebook, or an eType 2 codebook.

7. The method according to any one of claims 5 to 6, further comprising: Second control signaling is received from the network entity triggering at least one of: the at least one CSI report with CSI prediction, or the CSI-RS resources for the CSI prediction.

8. The method according to any one of claims 2 to 7, wherein Sending the at least one CSI report with the CSI prediction for the one or more future time slots to the network entity comprises: The at least one CSI report including a complete set of CSI parameters for all of the one or more future time slots is transmitted to the network entity.

9. The method according to any one of claims 2 to 7, wherein The sending the at least one CSI report with the CSI prediction for the one or more future time slots to the network entity comprises: The at least one CSI report including all CSI parameters for a first time slot of the one or more future time slots and a portion of CSI parameters for other future time slots of the one or more future time slots is transmitted to the network entity.

10. The method according to any one of claims 2 to 7, wherein Sending the at least one CSI report with the CSI prediction for the one or more future time slots to the network entity comprises: The at least one CSI report including one or more common CSI parameters for all of the one or more future time slots and one or more differential CSI parameters for each of the one or more future time slots is transmitted to the network entity.

11. The method according to any one of claims 2 to 10, wherein Sending the at least one CSI report with the CSI prediction for the one or more future time slots to the network entity comprises: The at least one CSI report is transmitted to the network entity including at least one of: a slot offset between a first CSI prediction slot and a CSI reporting slot, a slot offset between each CSI prediction slot, or a number of CSI prediction slots in the at least one CSI report.

12. The method of any one of claims 2 to 11, further comprising: A priority order of one or more precoder matrix indicators (PMIs) in the at least one CSI report is determined based on at least one of: whether the PMI is for wideband or subband, a subband index of the PMI, or a predicted slot index of the PMI.

13. The method of claim 12, wherein: Sending the at least one CSI report with the CSI prediction for the one or more future time slots to the network entity comprises: The one or more PMIs are transmitted to the network entity based on the priority order.

14. A method of wireless communication at a network entity, comprising: configuring at least one CSI reporting configuration for CSI reporting with CSI prediction based on the CSI-RS resources; The at least one CSI report with CSI predictions for one or more future time slots is received from a user equipment (UE).

15. The method of claim 14, wherein: The at least one CSI report with CSI prediction is configured based on a Type 1 codebook, a Type 2 codebook, or an eType 2 codebook.

16. The method of any one of claims 14 and 15, further comprising: Triggering of a subsequent CSI report or CSI-RS is skipped based on the CSI prediction in the at least one CSI report.

17. An apparatus for wireless communication, comprising a transceiver, a memory, and a processor, the processor being coupled to the memory and the transceiver, the apparatus being configured to implement the method according to any one of claims 1 to 16.

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