Control signaling for time-domain channel property reporting for network energy saving
By implementing control signaling for time-domain channel property reporting, the wireless communication system addresses the challenges of power consumption and uplink performance, achieving efficient network energy saving and improved coverage.
Patent Information
- Application Number
- PCT/CN2023/129640
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-11-03
- Publication Date
- 2025-05-08
AI Technical Summary
Current wireless communication systems face challenges in efficiently managing power consumption and improving uplink coverage and performance, particularly in optimizing time-domain channel properties for network energy saving.
The implementation of control signaling for time-domain channel property reporting, which involves configuring CSI reports with specific sub-configurations and triggering aperiodic TDCP reports via physical uplink shared channels, allows network entities to optimize precoder selection and reduce power consumption.
This approach reduces power consumption at network entities, enhances uplink coverage, and improves overall performance by enabling more precise configuration of time-domain channel properties.
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Figure CN2023129640_08052025_PF_FP_ABST
Abstract
Description
CONTROL SIGNALING FOR TIME-DOMAIN CHANNEL PROPERTY REPORTING FOR NETWORK ENERGY SAVINGTECHNICAL FIELD
[0001] The present disclosure relates generally to wireless communication, and more particularly, to methods of control signaling for time-domain channel property reporting for network energy saving.
[0002] BRIEF SUMMARY
[0003] The Third Generation Partnership Project (3GPP) specifies a radio interface referred to as fifth generation (5G) new radio (NR) (5G NR) . An architecture for a 5G NR wireless communication system includes a 5G core (5GC) network, a 5G radio access network (5G-RAN) , a user equipment (UE) , etc. The 5G NR architecture seeks to provide increased data rates, decreased latency, and / or increased capacity compared to prior generation cellular communication systems.
[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 neither identifies key or critical elements of all aspects nor delineates 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 is presented later.
[0005] Time-variability of a channel between a network entity and a user equipment (UE) (e.g., a measure of how fast the channel is varying with time) is a key property that enables the network entity to configure parameters to optimize performance. In a multiple-input multiple-output (MIMO) communication system, channel state information (CSI) provides information for a network entity to select a digital precoder for a UE. The network entity configures a time domain channel property (TDCP) report by a CSI report configuration. The TDCP helps the network entity select the precoder. For example, information of the time-variability of the channel indicated by the TDCP report may allow the network entity to switch from Type-II codebook to Type-I codebook when the time-variability of the channel is higher than a threshold.
[0006] The network entity configures sets of tracking reference signal (TRS) resources as channel measurement resources (CMR) . The network entity transmits a subset of the TRSs to the UE for the UE to determine a correlation and / or phase between channels over a time delay. A TRS resource set may be referred to as a channel state information reference signal (CSI-RS) resource set configured for tracking. A TRS resource is a single port CSI-RS resource. The UE calculates and reports the wideband channel correlation and / or phase in the TDCP report for one or more delays configured by the network entity. The network entity can trigger the UE to transmit the aperiodic TDCP report via a physical uplink shared channel (PUSCH) .
[0007] According to some aspects, a UE receives, from a network entity, a configuration for a CSI report comprising at least one CSI report sub-configuration indicating CSI-RS resources. The UE receives, from the network entity, DCI indicating a subset of the at least one CSI report sub-configurations. The UE receives, from the network entity, CSI-RSs indicated by the subset of the at least one CSI report sub-configurations. The UE transmits, to the network entity, the CSI report comprising a TDCP report associated with the subset of the at least one CSI report sub-configurations.
[0008] According to some aspects, a network entity transmits, to a UE, a configuration for a CSI report comprising at least one CSI report sub-configuration indicating CSI-RS resources. The network entity transmits, to the UE, DCI indicating a subset of the at least one CSI report sub-configurations. The network entity transmits, to the UE, CSI-RSs indicated by the subset of the at least one CSI report sub-configurations. The network entity receives, from the UE, the CSI report comprising a TDCP report associated with the subset of the at least one CSI report sub-configurations.
[0009] Technical benefits of the present disclosure include reducing power consumption at a network entity and improving uplink coverage and performance.BRIEF DESCRIPTION OF THE DRAWINGS
[0010] FIG. 1 illustrates a diagram of a wireless communications system that includes a plurality of user equipments (UEs) and network entities in communication over one or more cells according to an embodiment.
[0011] FIG. 2 illustrates a diagram of an example CSI report configuration and CSI report according to an embodiment.
[0012] FIG. 3 illustrates a diagram of an example CSI report configuration and CSI report for spatial-domain network energy saving (SD-NES) and power-domain network energy saving (PD-NES) according to an embodiment.
[0013] FIG. 4A illustrates a network entity antenna with all antenna elements on according to an embodiment.
[0014] FIG. 4B illustrates a network entity antenna with a subset of antennas elements on for power savings according to an embodiment.
[0015] FIG. 5 is a signaling diagram illustrating communications between a UE and a network entity for reporting TDCP according to an embodiment.
[0016] FIG. 6 is a flowchart of a method of a UE for reporting TDCP according to an embodiment.
[0017] FIG. 7 is a flowchart of a method of a network entity for configuring TDCP reporting according to an embodiment.
[0018] FIG. 8 illustrates a diagram of an example CSI report configuration and CSI resource subset indicator according to an embodiment.
[0019] FIG. 9 illustrates a diagram of an example CSI report configuration and CSI resource set indicator according to an embodiment.
[0020] FIG. 10 illustrates a diagram of an example CSI report configuration with TDCP as a common reporting quantity according to an embodiment.
[0021] FIG. 11 illustrates a diagram of an example CSI report configuration with TDCP, delay parameters, and phase as a common reporting quantity according to an embodiment.
[0022] FIG. 12 is a flowchart of a method of wireless communication at a UE according to an embodiment.
[0023] FIG. 13 is a flowchart of a method of wireless communication at a network entity according to an embodiment.
[0024] FIG. 14 is a diagram illustrating a hardware implementation for an example UE apparatus according to some embodiments.
[0025] FIG. 15 is a diagram illustrating a hardware implementation for one or more example network entities according to some embodiments.
[0026] In FIGs. 1-15 like reference numbers refer to like actions.DETAILED DESCRIPTION
[0027] FIG. 1 illustrates a diagram 100 of a wireless communications system associated with a plurality of cells 190. The wireless communications system includes user equipments (UEs) 102 and base stations / network entities 104. Some base stations may include an aggregated base station architecture and other base stations may include a disaggregated base station architecture. The aggregated 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 among two or more units (e.g., radio unit (RU) 106, distributed unit (DU) 108, central unit (CU) 110) . For example, a CU 110 is implemented within a RAN node, and one or more DUs 108 may be co-located with the CU 110, or alternatively, may be geographically or virtually distributed throughout one or multiple other RAN nodes. The DUs 108 may be implemented to communicate with one or more RUs 106. Any of the RU 106, the DU 108 and the CU 110 can be implemented as virtual units, such as a virtual radio unit (VRU) , a virtual distributed unit (VDU) , or a virtual central unit (VCU) . The base station / network entity 104 (e.g., an aggregated base station or disaggregated units of the base station, such as the RU 106 or the DU 108) , may be referred to as a transmission reception point (TRP) .
[0028] Operations of the base station 104 and / or network designs may be based on aggregation characteristics of base station functionality. For example, disaggregated base station architectures are 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 a cloud radio access network (C-RAN) . Disaggregation may include distributing functionality across the two or more units at various physical locations, as well as distributing functionality for at least one unit virtually, which can enable flexibility in network designs. The various units of the disaggregated base station architecture, or the disaggregated RAN architecture, can be configured for wired or wireless communication with at least one other unit. For example, the base stations 104d, 104e and / or the RUs 106a, 106b, 106c, 106d may communicate with the UEs 102a, 102b, 102c, 102d, and / or 102s via one or more radio frequency (RF) access links based on a Uu interface. In examples, multiple RUs 106 and / or base stations 104 may simultaneously serve the UEs 102, such as by intra-cell and / or inter-cell access links between the UEs 102 and the RUs 106 / base stations 104.
[0029] The RU 106, the DU 108, and the 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 can be configured to transmit or receive the information / signals over a wired transmission medium, such as via the fronthaul link 160 between the RU 106d and the baseband unit (BBU) 112 of the base station 104d associated with the cell 190d. The BBU 112 includes a DU 108 and a CU 110, which may also have a wired interface (e.g., midhaul link) configured between the DU 108 and the CU 110 to transmit or receive the information / signals between the DU 108 and the CU 110. In further examples, a wireless interface, which may include a receiver, a transmitter, or a transceiver, such as an RF transceiver, configured to transmit and / or receive the information / signals via the wireless transmission medium, such as for information communicated between the RU 106a of the cell 190a and the base station 104e of the cell 190e via cross-cell communication beams 136-138 of the RU 106a and the base station 104e.
[0030] The RUs 106 may be configured to implement lower layer functionality. 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 functionality, such as execution of fast Fourier transform (FFT) , inverse FFT (iFFT) , digital beamforming, physical random access channel (PRACH) extraction and filtering, etc. The functionality of the RU 106 may be based on the functional split, such as a functional split of lower layers.
[0031] The RUs 106 may transmit or receive over-the-air (OTA) communication with one or more UEs 102. For example, the RU 106b of the cell 190b communicates with the UE 102b of the cell 190b via a first set of communication beams 132 of the RU 106b and a second set of communication beams 134b of the UE 102b, which may correspond to inter-cell communication beams or, in some examples, cross-cell communication beams. For instance, the UE 102b of the cell 190b may communicate with the RU 106a of the cell 190a via a third set of communication beams 134a of the UE 102b and a fourth set of communication beams 136 of the RU 106a. DUs 108 can control both real-time and non-real-time features of control plane and user plane communications of the RUs 106.
[0032] Any combination of the RU 106, the DU 108, and the CU 110, or reference thereto individually, may correspond to a base station 104. Thus, the base station 104 may include at least one of the RU 106, the DU 108, or the CU 110. The base stations 104 provide the UEs 102 with access to a core network. The base stations 104 may relay communications between the UEs 102 and the core network (not shown) . The base stations 104 may be associated with macrocells for higher-power cellular base stations and / or small cells for lower-power cellular base stations. For example, the cell 190e may correspond to a macrocell, whereas the cells 190a-190d may correspond to small cells. Small cells include femtocells, picocells, microcells, etc. A network that includes at least one macrocell 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, whereas transmissions from the base station 104 / RU 106 to the UE 102 are referred to as downlink (DL) transmissions. Uplink transmissions may also be referred to as reverse link transmissions and downlink transmissions may also be referred to as forward link transmissions. For example, the RU 106d utilizes antennas of the base station 104d of cell 190d to transmit a downlink / forward link communication to the UE 102d or receive an uplink / reverse link communication from the UE 102d based on the Uu interface associated with the access link between the UE 102d and the base station 104d / RU 106d.
[0034] Communication links between the UEs 102 and the base stations 104 / RUs 106 may be based on multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. The communication links may be associated with one or more carriers. The UEs 102 and the base stations 104 / RUs 106 may utilize a spectrum bandwidth of Y MHz (e.g., 5, 10, 15, 20, 100, 400, 800, 1600, 2000, etc. MHz) per carrier allocated in a carrier aggregation of up to a total of Yx MHz, where x component carriers (CCs) are used for communication in each of the uplink and downlink directions. The carriers may or may not be adjacent to each other along a frequency spectrum. In examples, uplink and downlink carriers may be allocated in an asymmetric manner, with more or fewer carriers allocated to either the uplink or the downlink. A primary component carrier and one or more secondary component carriers may be included in the component carriers. The primary component carrier may be associated with a primary cell (PCell) and a secondary component carrier may be associated with a secondary cell (SCell) .
[0035] Some UEs 102, such as the UEs 102a and 102s, may perform device-to-device (D2D) communications over sidelink. For example, a sidelink communication / D2D link utilizes a spectrum for a wireless wide area network (WWAN) associated with uplink and downlink communications. Such sidelink / D2D communication may be performed through various wireless communications systems, such as wireless fidelity (Wi-Fi) systems, Bluetooth systems, Long Term Evolution (LTE) systems, New Radio (NR) systems, etc.
[0036] The UEs 102 and the base stations 104 / RUs 106 may each include a plurality of antennas. The plurality of antennas may correspond to antenna elements, antenna panels, and / or antenna arrays that may facilitate beamforming operations. For example, the RU 106b transmits a downlink beamformed signal based on a first set of communication beams 132 to the UE 102b in one or more transmit directions of the RU 106b. The UE 102b may receive the downlink beamformed signal based on a second set of communication beams 134b from the RU 106b in one or more receive directions of the UE 102b. In a further example, the UE 102b may also transmit an uplink beamformed signal (e.g., sounding reference signal (SRS) ) to the RU 106b based on the second set of communication beams 134b in one or more transmit directions of the UE 102b. The RU 106b may receive the uplink beamformed signal from the UE 102b in one or more receive directions of the RU 106b. The UE 102b may perform beam training to determine the best receive and transmit directions for the beamformed signals. The transmit and receive directions for the UEs 102 and the base stations 104 / RUs 106 may or may not be the same.
[0037] In further examples, beamformed signals may be communicated between a first base station / RU 106a and a second base station 104e. For instance, the base station 104e of the cell 190e may transmit a beamformed signal to the RU 106a based on the communication beams 138 in one or more transmit directions of the base station 104e. The RU 106a may receive the beamformed signal from the base station 104e of the cell 190e based on the RU communication beams 136 in one or more receive directions of the RU 106a. In further examples, the base station 104e transmits a downlink beamformed signal to the UE 102e based on the communication beams 138 in one or more transmit directions of the base station 104e. The UE 102e receives the downlink beamformed signal from the base station 104e based on UE communication beams 130 in one or more receive directions of the UE 102e. The UE 102e may also transmit an uplink beamformed signal to the base station 104e based on the UE communication beams 130 in one or more transmit directions of the UE 102e, such that the base station 104e may receive the uplink beamformed signal 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, “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 next 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, network equipment, or other related terminology. The base station 104 or an entity at the base station 104 can be implemented as an IAB node, a relay node, a sidelink node, an aggregated (monolithic) base station, or a disaggregated base station including one or more RUs 106, DUs 108, and / or CUs 110. A set of aggregated or disaggregated base stations may be referred to as a next generation-radio access network (NG-RAN) . In some examples, the UE 102a operates in dual connectivity (DC) with the base station 104e and the base station / RU 106a. In such cases, the base station 104e can be a master node and the base station / RU 106a can be a secondary node.
[0039] Uplink / downlink signaling may also be communicated via a satellite positioning system (SPS) 114. In an example, the SPS 114 associated with the cell 190c may be in communication with one or more UEs 102, such as the UE 102c, and one or more base stations 104 / RUs 106, such as the RU 106c. The SPS 114 may correspond to one or more of a Global Navigation Satellite System (GNSS) , a global position system (GPS) , a non-terrestrial network (NTN) , or other satellite position / location system. The SPS 114 may be associated with LTE signals, NR signals (e.g., based on round trip time (RTT) and / or multi-RTT) , wireless local area network (WLAN) signals, a terrestrial beacon system (TBS) , sensor-based information, NR enhanced cell ID (NR E-CID) techniques, 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 referring to FIG. 1, in certain aspects, any of the UEs 102 may include a TDCP reporting component 140 configured to receive, from a network entity 104, a configuration for a CSI report including one or more CSI report sub-configurations and CSI-RS resources; receive, from the network entity 104, a signal triggering at least one of the one or more CSI report sub-configurations; receive, from the network entity 104, CSI-RSs indicated by the at least one of the one or more CSI report sub-configurations; and transmit, to the network entity 104, the CSI report based on the CSI-RSs, the CSI report including a TDCP report associated with the at least one of the one or more CSI report sub-configurations.
[0041] In certain aspects, any of the base stations 104 or a network entity of the base stations 104 may include a TDCP configuration component 150 configured to transmit, to a UE 102, a configuration for a CSI report including one or more CSI report sub-configurations and CSI-RS resources; transmit, to the UE 102, a signal triggering at least one of the one or more CSI report sub-configurations; transmit, to the UE 102, CSI-RSs indicated by the at least one of the one or more CSI report sub-configurations; and receive, from the UE 102, the CSI report based on the CSI-RSs, the CSI report including a TDCP report associated with the at least one of the one or more CSI report sub-configurations.
[0042] Accordingly, FIG. 1 describes a wireless communication system that may be implemented in connection with aspects of one or more other figures described herein. Further, although the following description may be focused 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] FIG. 2 illustrates a diagram 200 of an example CSI report configuration 202 (e.g., a legacy CSI report configuration) and CSI report 211 according to an embodiment. In some aspects, the network entity configures (e.g., via RRC signaling CSI-ReportConfig) a CSI report 211 based on CSI report configuration 202. The CSI report 211 may be configured to report TDCP 208 based on the report quantity 207 being set to TDCP. Throughout the specification, a CSI report that includes TDCP may be referred to as a CSI report, a TDCP report, or a CSI / TDCP report. The network entity configures one or more CSI-RS resource sets 203, 204, 205 for channel measurement as tracking reference signals (TRSs) . A TRS resource set may be a single port CSI-RS resource set configured for tracking (e.g., with the RRC parameter trs-Info configured) . The UE calculates and reports the wideband channel correlation for one or more delays 206 configured by the network entity. The network entity may trigger (e.g., via DCI) the UE to transmit the aperiodic CSI report 211 containing the TDCP 208 via a physical uplink shared channel (PUSCH) . The UE may report the TDCP 208a, 208b, and 208c for each of the delays 206 d1, d2, d3, respectively. The UE may report the TDCP 208a, 208b, and 208c on CSI part 1 via PUSCH.
[0044] FIG. 3 illustrates a diagram 300 of an example CSI report configuration 302 and CSI report 311 for spatial-domain network energy saving (SD-NES) and power-domain network energy saving (PD-NES) according to an embodiment. For NES, the network entity may configure l (e.g., l >1) CSI report sub-configurations 306 in the CSI report configuration 302. The network entity triggers (e.g., via DCI) the UE to report n (e.g., 1≤n≤l) CSI report (s) 311 including TDCP reports 307 corresponding to n CSI report sub-configurations 306. The network entity may configure the CSI report configuration 302 based on type 1 SD-NES, type 2 SD-NES, and / or PD-NES.
[0045] For type 1 SD-NES, the network entity configures the CSI-RS resources 303 as CMR in the CSI report configuration 302 and configures a port subset indicator (e.g., port-subsetIndicator) in each CSI report sub-configuration 306, which indicates the subset of antenna ports for the configured CSI-RS resources for the CSI report 311. The UE calculates the CSI for each CSI report sub-configuration 306 based on the indicated subset of antenna ports for the CSI-RS resources configured in the CSI report configuration 302. The network entity may determine which subset of antenna ports to transmit downlink communications based on the CSI report 311. The network entity may select a subset of antenna ports having a smaller number of antenna ports to transmit downlink communications for energy saving.
[0046] For type 2 SD-NES, the network entity configures the CSI-RS resources 303 as CMR in the CSI report configuration 302 and configures a list of CSI-RS resource index (es) indicating a subset of the CSI-RS resources (e.g., nzp-CSI-RS-resourceList) in each CSI report sub-configuration 306. The subset of CSI-RS resources may have the same number of antenna ports with a different number of antenna elements enabled as described with reference to FIGs. 4A and 4B.The UE calculates the CSI for each CSI report sub-configuration 306 based on the subset of CSI-RS resources. The network entity may determine which antenna elements to enable for downlink communications based on the CSI report 311. The network entity may enable a smaller number of antenna elements to transmit downlink communications for energy saving.
[0047] For PD-NES, the network entity configures the CSI-RS resources 303 and a first power offset between the PDSCH and CSI-RS for each CSI-RS resource 303 in the CSI report configuration 302. The network entity may configure a second (e.g., an additional) power offset (e.g., powerOffset) between the PDSCH and CSI-RS in each CSI report sub-configuration 306. The UE calculates the CSI for each CSI report sub-configuration 306 based on the total power offset (the first power offset plus the second power offset) . The first power offset may be an actual power offset between the PDSCH and CSI-RS, whereas the second power offset may be a hypothetical power offset for the CSI calculation. The network entity may determine whether to reduce the transmit power for downlink communications based on the CSI report 311. In some aspects, the network entity may configure the CSI report configuration 302 for SD-NES only, PD-NES only, or jointly SD-NES and PD-NES.
[0048] In some aspects, the network entity transmits the CSI-RSs to the UE in the configured CSI-RS resources 303a-303d. The CSI-RS resources 303a-303d correspond to resource elements (e.g., time / frequency resources) configured by the CSI report configuration 302. When the UE receives a trigger (e.g., a DCI signal) , the UE determines the channel correlation and / or phase based on measurements of the CSI-RSs in the CSI-RS resources 303a-303d for each of the CSI report sub-configurations 306. In the non-limiting example of FIG. 3, the CSI report 311 includes TDCP report 307a corresponding to CSI report sub-configuration 306a, TDCP report 307b corresponding to CSI report sub-configuration 306b, and TDCP report 307n corresponding to CSI report sub-configuration 306l-1.
[0049] FIG. 4A illustrates a diagram 400 of a network entity antenna 411a with all antenna elements on according to an embodiment. FIG. 4B illustrates a diagram 401 of a network entity antenna 411b with a subset of antennas elements on for power savings according to an embodiment. In some aspects, antennas 411a and 411b may be MIMO antenna arrays that facilitates beamforming operations. In the example of FIG. 4A, when the network entity transmits with all antenna elements on, the transmission beam 412a may have a first beamwidth corresponding to a first channel property. In the example of FIG. 4B, when the network entity transmits with a subset of antenna elements on (e.g., one fourth of the antenna elements on) , the transmission beam 412b may have a second (e.g., wider) beamwidth corresponding to a second channel property. When the network entity configures the CSI report for type 2 SD-NES, the UE reports the TDCP for the first channel property (based on beam 412a) and the TDCP for the second channel property (based on beam 412b) . If the network entity determines the first and second channels are highly correlated based on the TDCP reports, the network entity may transmit PDSCH based on the subset of antennas elements on for power savings. Additionally or alternatively, the network entity may signal the UE to reduce the frequency of CSI reporting for reduced communications overhead.
[0050] FIG. 5 is a signaling diagram 500 illustrating communications between a UE 102 and a network entity 104 for reporting CSI / TDCP according to an embodiment. In some aspects, the UE 102 optionally transmits 505, to the network entity 104, a UE capability report indicating support for CSI / TDCP reporting based on one or more CSI report sub-configurations. In this regard, the UE 102 may transmit 505 the UE capability report via PUCCH, PUSCH, uplink control information (UCI) , or other suitable communication. The UE capability report indicates whether the UE 102 supports TDCP reporting for a CSI report configuration with CSI report sub-configurations; the maximum number of CSI report sub-configurations in a CSI report configuration for TDCP reporting; the maximum number of CSI report sub-configurations in a component carrier (CC) or across all CCs in a band or band combination; the maximum number of reported TDCPs or delays per CSI report sub-configuration; the maximum number of reported TDCPs or delays across all CSI report sub-configurations in a CSI report configuration; the maximum number of reported TDCPs or delays across all CSI report sub-configurations in a CC or across all CCs in a band or band combination. The UE 102 may report the UE capability for the type 1 SD-NES, type 2 SD-NES, and / or PD-NES separately or jointly.
[0051] The network entity 104 transmits 510, to the UE 102, a configuration for a CSI report including one or more CSI report sub-configurations and CSI-RS resources. In this regard, the network entity 104 transmits 510 the configuration for the CSI report by RRC signaling (e.g., RRCReconfiguration or CSI-ReportConfig) . The CSI report configuration may indicate one or more CSI-RS resource sets (e.g., non-zero power (NZP) CSI-RS resource sets) , one or more CSI report sub-configurations including at least one of the following: one or more CSI-RS resource subset indicators indicating the CSI-RS resources for channel measurement; an indicator of the CSI-RS resource set (s) for channel measurement; the number of delays for TDCP reporting; delay value (s) for the TDCP report (s) ; and / or an indicator of whether to report the phase in the TDCP report. The network entity 104 configures the report quantity as TDCP.
[0052] In some aspects, if resourceType is set to aperiodic, the network entity 104 configures up to maxNrofNZP-CSI-RS-ResourceSetsPerConfig resource sets. If resourceType is set to periodic or semi-persistent and groupBasedBeamReporting-v1710 is not configured or the reportQuantity is not set to ‘tdcp’ in information element (IE) CSI-ReportConfig, the network entity 104 configures one resource set. If resourceType is set to periodic and the reportQuantity is set to ‘tdcp’ , the network entity 104 configures up to three NZP CSI-RS resource sets. If resourceType is set to periodic or semi-persistent and groupBasedBeamReporting-v1710 is configured, the network entity 104 configures two resource sets, which may be two NZP CSI-RS resource sets, two CSI-SSB resource sets, or one NZP CSI-RS resource set and one CSI-SSB resource set. In this case, the following applies: if the list of CSI report sub-configurations has one NZP CSI-RS resource set, the resource set is indicated by a resource set indicator set to 0; if the list of CSI report sub-configurations has two NZP CSI-RS resource sets, the first resource set is indicated by a resource set indicator set to 0 and the second resource set is indicated by a resource set indicator set to 1.
[0053] In an alternative embodiment, the network entity 104 refrains from configuring a CSI report configuration with a list of CSI report sub-configurations and the report quantity set to TDCP. Instead, the network entity 104 configures a CSI report configuration with a list of CSI report sub-configurations and the report quantity includes at least a rank indicator (RI) . The UE 102 may not expect the network entity 104 to configure a CSI report configuration with a list of CSI report sub-configurations and the report quantity set to TDCP. Instead, the UE 102 may expect the network entity 104 to configure a CSI report configuration with a list of CSI report sub-configurations and the report quantity includes at least RI.
[0054] In some aspects, if the UE 102 is configured with a CSI-ReportConfig that contains a list of sub-configurations provided by the higher layer parameter csi-ReportSubConfigList, the UE 102 does not expect the higher layer parameter reportQuantity to be set to ‘tdcp’ . In another example, if the UE 102 is configured with a CSI-ReportConfig that contains a list of sub-configurations provided by the higher layer parameter csi-ReportSubConfigList, the UE 102 does not expect the higher layer parameter reportQuantity to be set to ‘tdcp’ , ‘cri-RSRP’ , ‘cri-SINR’ , or ‘cri-SINR-Index' .
[0055] In some aspects, the network entity 104 may refrain from configuring a CSI report configuration with a list of CSI report sub-configurations including port subset indicator or CSI-RS resource subset indicator and report quantity set to TDCP. Instead, the network entity 104 may configure a CSI report configuration with a list of CSI report sub-configurations including port subset indicator or CSI-RS resource subset indicator and the report quantity includes at least RI. The UE 102 may not expect the network entity 104 to configure a CSI report configuration with a list of CSI report sub-configurations or CSI-RS resource subset indicator including port subset indicator and report quantity set to TDCP. Instead, the UE 102 may expect the network entity 104 to configure a CSI report configuration with a list of CSI report sub-configurations including port subset indicator or CSI-RS resource subset indicator and the report quantity includes at least RI.
[0056] In some aspects, the network entity 104 may refrain from configuring a CSI report configuration with a list of CSI report sub-configurations including additional power offset and report quantity set to TDCP. Instead, the network entity 104 may configure a CSI report configuration with a list of CSI report sub-configurations including additional power offset and the report quantity includes at least RI. The UE 102 may not expect the network entity 104 to configure a CSI report configuration with a list of CSI report sub-configurations including additional power offset and the report quantity set to TDCP. Instead, the UE 102 may expect the network entity 104 to configure a CSI report configuration with a list of CSI report sub-configurations including additional power offset and the report quantity includes at least RI.
[0057] In some aspects, the network entity 104 may refrain from configuring a CSI report configuration with TRS for channel measurement and a list of CSI report sub-configurations. Instead, the network entity 104 may configure a CSI report configuration with CSI-RS for CSI acquisition for channel measurement and a list of CSI report sub-configurations. The UE 102 may not expect the network entity 104 to configure a CSI report configuration with TRS for channel measurement and a list of CSI report sub-configurations. Instead, the UE 102 may expect the network entity 104 to configure a CSI report configuration with CSI-RS for CSI acquisition for channel measurement and a list of CSI report sub-configurations. The CSI-RS for CSI acquisition is a CSI-RS in a CSI-RS resource set without trs-Info configured and without repetition configured.
[0058] The network entity 104 transmits 520, to the UE 102, a signal triggering at least one CSI / TDCP report of the CSI report sub-configurations. In this regard, the network entity 104 transmits 520 the signal triggering the at least one CSI / TDCP report via DCI.
[0059] The network entity 104 transmits 530, to the UE 102, the CSI-RSs (e.g., single port CSI-RSs configured for tracking (TRSs) ) in the resource sets configured in the CSI report configuration. In this regard, the network entity 104 may transmit 530 the CSI-RSs periodically or aperiodically. When the network entity 104 transmits 530 the CSI-RSs periodically, the network entity 104 may transmit 530 the CSI-RSs before and / or after transmitting 520 the DCI triggering the CSI / TDCP report. When the network entity 104 transmits 530 the CSI-RSs aperiodically, the network entity 104 transmits 530 the CSI-RSs after transmitting 520 the DCI triggering the CSI / TDCP report.
[0060] The UE 102 determines 540 the amplitude of correlation and / or phase difference of the CSI-RSs corresponding to the triggered CSI report sub-configuration (s) . For example, if the delay is configured for four symbols, the UE 102 determines 540 the amplitude (e.g., a value between 0 and 1) of the channel correlation for CSI-RSs separated by four symbols in time. If the triggered CSI report sub-configuration (s) indicate phase is to be reported, the UE 102 determines 540 a phase difference (e.g., a value between -180 degrees and 180 degrees) between the configured CSI-RSs for each of the configured delays.
[0061] The UE 102 transmits 550, to the network entity 104, the CSI / TDCP report (s) indicating the CSI report sub-configuration identifier, the delay values, the amplitude of the correlation between the configured CSI-RSs for each of the delays and / or a phase difference between the configured CSI-RSs for each of the configured delays. In some aspects, the UE 102 transmits the CSI / TDCP report (s) as a first table listing the TDCP for the first triggered CSI sub-report and then the TDCP for the next triggered CSI sub-report. If the network entity 104 configures or triggers one CSI sub-report, the UE 102 may report the CSI sub-report as a CSI report. The UE 102 may report the amplitude of correlation in the TDCP from the first configured delay to the last configured delay and the phase (if reported) in the TDCP from the first configured delay to the last delay for each CSI sub-report or CSI report. Alternatively, the UE 102 may report the amplitude of correlation and phase (if reported) in the TDCP from the first configured delay to the last configured delay for each CSI sub-report or CSI report. In some aspects, the UE 102 transmits the CSI / TDCP report (s) as a second table listing the amplitude for the TDCP for the triggered CSI sub-reports first and then reports the phase for the TDCP for the triggered CSI sub-reports. The size of the CSI / TDCP report may be variable based on the number of reported delays, the number of reported sub-configurations, and / or whether phase is reported.
[0062] In some aspects, after a CSI report (re) configuration, a serving cell activation, and / or a bandwidth part (BWP) change, the UE 102 transmits a CSI / TDCP report or sub-report after receiving at least one CSI-RS transmission occasion for each CSI-RS resource for the configured TRS set for channel measurement for all the triggered or configured CSI sub-configurations no later than a CSI reference resource and drops the report otherwise. After a CSI-RS (re) configuration or transmission configuration indication (TCI) (re) configuration for the TRS configured for channel measurement, the UE 102 transmits the CSI / TDCP report or sub-report after receiving at least one CSI-RS transmission occasion for each CSI-RS resource for the configured TRS set for channel measurement for all the triggered (e.g., DCI triggered at step 520) or configured CSI (e.g., configured at step 510) sub-configurations no later than a CSI reference resource and drops the report otherwise.
[0063] In some aspects, if discontinuous reception (DRX) is configured, the UE 102 transmits the CSI / TDCP report or sub-report if the UE 102 has received at least one CSI-RS transmission occasion for each CSI-RS resource for the configured TRS set for channel measurement for all the triggered (e.g., DCI triggered at step 520) or configured (e.g., configured at step 510) CSI sub-configurations in DRX active time no later than a CSI reference resource and drops the report otherwise.
[0064] In some aspects, for a periodic CSI / TDCP report, network entity 104 and / or the UE 102 may determine the CSI reference resource based on the total number of CSI-RS resources configured for channel measurement corresponding to the configured CSI report sub-configurations. For semi-persistent CSI / TDCP reporting or aperiodic CSI reporting, the network entity 104 and / or the UE 102 may determine the CSI reference resource based on the total number of CSI-RS resources configured for channel measurement corresponding to the triggered CSI report sub-configurations.
[0065] In some aspects, the CSI reference resource occurs before the slot for transmitting the CSI / TDCP report. In the frequency domain, the CSI reference resource is defined by a group of downlink physical resource blocks corresponding to the frequency band to which the derived CSI relates. In the time domain, the CSI reference resource for CSI / TDCP reporting in uplink slot n' is defined by a single downlink slot where Koffset is a parameter configured by a higher layer (e.g., as specified in clause 4.2 of 3GPP TS 38.213) , and where is the subcarrier spacing configuration for Koffset with a value of ‘0’ for frequency range 1. For periodic and semi-persistent CSI / TDCP reporting, if a single CSI-RS / SSB resource is configured for channel measurement corresponding to all the configured or triggered CSI sub-configurations, nCSI_ref is the smallest value greater than or equal to such that it corresponds to a valid downlink slot, or if multiple CSI-RS / SSB resources are configured for channel measurement corresponding to all the configured or triggered CSI sub-configurations, nCSI_ref is the smallest value greater than or equal to 5 such that it corresponds to a valid downlink slot.
[0066] FIG. 6 illustrates a flowchart 600 of a method of wireless communication at a UE. With reference to FIGs. 1, 5, and 14, the method may be performed by the UE 102 or UE 1402.
[0067] The UE transmits 605, to a network entity, a UE capability of supported configurations for TDCP reporting with CSI sub-configuration (s) . For example, referring to FIG. 5, the UE 102 transmits 505, to the network entity 104, a UE capability of supported configurations for TDCP reporting with CSI sub-configuration (s) .
[0068] The UE receives 610, from a network entity, a configuration for TDCP reporting with CSI sub-configuration (s) . For example, referring to FIG. 5, the UE 102 receives 510, from the network entity 104, a configuration for TDCP reporting with CSI sub-configuration (s) .
[0069] The UE receives 620, from a network entity, DCI for triggering the TDCP report for one or more CSI report sub-configurations. For example, referring to FIG. 5, the UE 102 receives 520, from the network entity 104, a signal for triggering the TDCP report for one or more CSI report sub-configurations.
[0070] The UE receives 630, from a network entity, configured CSI-RS resource set (s) for the TDCP report. For example, referring to FIG. 5, the UE 102 receives 530, from the network entity 104, configured CSI-RS resource set (s) for the TDCP report.
[0071] The UE determines 640 the amplitude of correlation and / or phase difference of the CSI-RSs. For example, referring to FIG. 5, the UE 102 determines 540 the amplitude of correlation and / or phase difference of the CSI-RSs.
[0072] The UE transmits 650, to a network entity, a CSI / TDCP report with one or more TDCP sub-reports for the triggered CSI report sub-configuration (s) . For example, referring to FIG. 5, the UE 102 transmits 550, to the network entity 104, a CSI / TDCP report with one or more TDCP sub-reports for the triggered CSI report sub-configuration (s) .
[0073] FIG. 7 illustrates a flowchart 700 of a method of wireless communication at a network entity. With reference to FIGs. 1, 5, and 15, the method may be performed by the network entity 104 or network entity 1504.
[0074] The network entity receives 705, from a UE, a UE capability of supported configurations for TDCP reporting with CSI sub-configuration (s) . For example, referring to FIG. 5, the network entity 104 receives 505, from the UE 102, a UE capability of supported configurations for TDCP reporting with CSI sub-configuration (s) .
[0075] The network entity transmits 710, to a UE, a configuration for TDCP reporting with CSI sub-configuration (s) . For example, referring to FIG. 5, the network entity 104 transmits 510, to the UE 102, a configuration for TDCP reporting with CSI sub-configuration (s) .
[0076] The network entity transmits 720, to a UE, DCI for triggering the TDCP report for one or more CSI report sub-configurations. For example, referring to FIG. 5, the network entity 104 transmits 520, to the UE 102, DCI for triggering the TDCP report for one or more CSI report sub-configurations.
[0077] The network entity transmits 730, to a UE, configured CSI-RS resource set (s) for the TDCP report. For example, referring to FIG. 5, the network entity 104 transmits 530, to the UE 102, configured CSI-RS resource set (s) for the TDCP report.
[0078] The network entity receives 750, from a UE, a TDCP report with one or more TDCP sub-reports for the triggered CSI report sub-configuration (s) . For example, referring to FIG. 5, the network entity 104 receives 550, from the UE 102, a TDCP report with one or more TDCP sub-reports for the triggered CSI report sub-configuration (s) .
[0079] FIG. 8 illustrates a diagram 800 of an example CSI report configuration 802 and CSI resource subset indicator 808 according to an embodiment. In some aspects, the network entity configures the CSI resource subset indicator 808 in a CSI report sub-configuration indicating a subset of CSI-RS resources configured for channel measurement.
[0080] In some aspects, the CSI resource subset indicator 808 is a bitmap as shown in the example of FIG. 8. The size of the bitmap is the (maximum) number of CSI-RS resources across the configured CSI-RS resource sets for channel measurement. The CSI resource subset indicator 808 may be based on the order of the CSI-RS resource set first and then the CSI-RS resource index within a CSI-RS resource set. Alternatively, the CSI resource subset indicator 808 may be based on the order of the CSI-RS resource ID across the CSI-RS resource sets. The first state (e.g., “0” ) of bit x may indicate the CSI-RS resource x across the CSI-RS resource sets for channel measurement is not selected and the second state (e.g., “1” ) of bit x may indicate the CSI-RS resource x across the CSI-RS resource sets for channel measurement is selected. In the non-limiting example of FIG. 8, the example bitmap of “100000001111” indicates that CSI-RS resources 803a and 805a-805d are selected for channel measurement while CSI-RS resources 803b-803d and 804a-804d are not selected for channel measurement.
[0081] In some aspects, the CSI resource subset indicator 808 indicates the CSI-RS resource index within the CSI-RS resource sets for channel measurement. Then the range of the indicator can be from 1 to the (maximum) number of CSI-RS resources across the CSI-RS resource sets for channel measurement or from 0 to the (maximum) number of CSI-RS resources across the CSI-RS resource sets for channel measurement minus 1. The CSI resource subset indicator 808 may be based on the order of the CSI-RS resource set first and then the CSI-RS resource index within a CSI-RS resource set. Alternatively, the CSI resource subset indicator 808 may be based on the order of the CSI-RS resource ID across the CSI-RS resource sets.
[0082] In some aspects, the CSI resource subset indicator 808 indicates the CSI-RS resource IDs configured in the CSI-RS resource sets for channel measurement. Then the range of the CSI resource subset indicator 808 can be from 1 to the maximum number of CSI-RS resource IDs multiplied by the maximum number of CSI-RS resources across the CSI-RS resource sets for channel measurement or from 0 to the maximum number of CSI-RS resource IDs multiplied by the maximum number of CSI-RS resources across the CSI-RS resource sets for channel measurement minus 1.
[0083] FIG. 9 illustrates a diagram 900 of an example CSI report configuration 902 and CSI resource set indicator 909 according to an embodiment. In some aspects, the network entity configures the CSI resource set indicator 909 in a CSI report sub-configuration indicating sets of CSI-RS resources configured for channel measurement.
[0084] In FIG. 8, the CSI-RS resources were selected on an individual resource granularity, whereas in the example of FIG. 9, the CSI-RS resources are selected on a CSI-RS resource set granularity. In some aspects, the CSI resource set indicator 909 is a bitmap as shown in the example of FIG. 9. The size of the bitmap is the (maximum) number of configured CSI-RS resource sets for channel measurement. The CSI resource set indicator 909 may be based on the order of the CSI-RS resource set index configured in the CSI-RS resource list for channel measurement or the CSI-RS resource set ID. The first state (e.g., “0” ) of bit x may indicate the CSI-RS resource set x for channel measurement is not selected for channel measurement and the second state of bit x (e.g., “1” ) may indicate the CSI-RS resource set x for channel measurement is selected for channel measurement. In some aspects, the CSI resource set indicator 909 indicates a list of CSI-RS resource set indexes configured in the CSI-RS resource list for channel measurement. In some aspects, the CSI resource set indicator 909 indicates the CSI-RS resource IDs based on the configured CSI-RS resource sets for channel measurement. In the non-limiting example of FIG. 9, the example bitmap of “101” indicates that CSI-RS resource sets 903 (e.g., CSI-RS resources 903a-903d) and 905 (e.g., CSI-RS resources 905a-905d) are selected for channel measurement while CSI-RS resource set 904 (e.g., CSI-RS resources 904a-904d) is not selected for channel measurement.
[0085] FIG. 10 illustrates a diagram 1000 of an example CSI report configuration 1002 with TDCP set as a common reporting quantity 1009 according to an embodiment. The CSI report 1011 may include CSI sub-reports 1007a-1007n for CSI-RS resource sets 1003, 1004, and 1005. In some aspects, the network entity may configure at least one of the following parameters in the CSI report sub-configurations 1006: the number of reported delays for the TDCP report which indicates the number of reported TDCPs for the CSI sub-report 1007 corresponding to the CSI report sub-configuration 1006; the delay values (e.g., number of symbols, number of slots, number of subframes) for the TDCP report, which indicates the delay (s) for each TDCP report for the CSI sub-report 1007 corresponding to the CSI report sub-configuration 1006; an indicator of whether the UE should report phase in addition to correlation amplitude for the CSI sub-report 1007 corresponding to the CSI report sub-configuration 1006. In some aspects, when the network entity configures the parameter (s) above in the CSI report sub-configuration 1007, the network entity may refrain from configuring the same parameters in the CSI report configuration 1002. In some aspects, when the network entity configures the parameter (s) above in the CSI report sub-configuration 1006, the UE may ignore the same parameters in CSI report configuration 1002.
[0086] FIG. 11 illustrates a diagram 1100 of an example CSI report configuration 1102 with TDCP, number of delays, value of delays, and phase reporting indicator as common reporting parameters 1109 according to an embodiment. The CSI report 1111 may include CSI sub-reports 1107a-1107n for CSI-RS resource sets 1103, 1104, and 1105. The CSI report sub-configurations 1106 may indicate the specific CSI-RS resource sets for the CSI sub-reports 1107. In some aspects, the network entity may configure the same number of CSI-RS resources sets in each configured or triggered CSI report sub-configuration 1107. The network entity may refrain from configuring a different number of CSI-RS resource sets in each configured or triggered CSI report sub-configuration 1106. Thus, the UE may expect the network entity to configure the same number of CSI-RS resource sets in each configured or triggered CSI report sub-configuration 1106.
[0087] In some aspects, the UE may determine whether to report the TDCP for a delay value in a CSI sub-report 1107 based on whether the CSI-RS resource sets in a CSI report sub-configuration 1106 are transmitted with the same slot or symbol offsets configured by the delay value. If the CSI-RS resource sets in a CSI report sub-configuration 1106 are not transmitted with the same slot or symbol offsets configured by the delay value, the UE may not report the TDCP corresponding to the delay or the TDCP for the CSI report sub-configuration 1106 or the TDCP for the CSI report configuration 1102, or the UE may report an invalid TDCP based on a predefined value, (e.g., 0) . Otherwise, the UE may report the TDCP.
[0088] FIG. 12 illustrates a flowchart 1200 of a method of wireless communication at a UE. With reference to FIGs. 1, 5, and 14, the method may be performed by the UE 102 and / or the UE apparatus 1402.
[0089] The UE (optionally) transmits 1205, to a network entity, a UE capability indicating supported configurations for TDCP reporting with CSI sub-configuration (s) . For example, referring to FIG. 5, the UE 102 (optionally) transmits 505, to the network entity 104, a UE capability indicating supported configurations for TDCP reporting with CSI sub-configuration (s) .
[0090] The UE receives 1210, from a network entity, a configuration for a CSI report including one or more CSI report sub-configurations and CSI-RS resources. For example, referring to FIG. 5, the UE 102 receives 510, from the network entity 104, a configuration for a CSI report including one or more CSI report sub-configurations and CSI-RS resources.
[0091] The UE receives 1220, from a network entity, a signal triggering at least one of the one or more CSI report sub-configurations. For example, referring to FIG. 5, the UE 102 receives 520, from the network entity 104, a signal (e.g., DCI) triggering at least one of the one or more CSI report sub-configurations.
[0092] The UE receives 1230, from a network entity, CSI-RSs indicated by the at least one of the one or more CSI report sub-configurations. For example, referring to FIG. 5, the UE 102 receives 530, from the network entity 104, CSI-RSs indicated by the at least one of the one or more CSI report sub-configurations.
[0093] The UE transmits 1250, to a network entity, the CSI report based on the CSI-RSs, the CSI report including a TDCP report associated with the at least one of the one or more CSI report sub-configurations. The UE may determine the amplitude of correlation and / or phase difference of the CSI-RSs for the CSI report. For example, referring to FIG. 5, UE transmits 550, to the network entity 104, the CSI report based on the CSI-RSs, the CSI report including a TDCP report associated with the at least one of the one or more CSI report sub-configurations.
[0094] FIG. 12 describes a method from a UE-side of a wireless communication link, whereas FIG. 13 describes a method from a network-side of the wireless communication link.
[0095] FIG. 13 illustrates a flowchart 1300 of a method of wireless communication at a network entity. With reference to FIGs. 1, 5, and 15, the method may be performed by the network entity 104 and / or the network entity 1504.
[0096] The network entity receives 1305, from a UE, a UE capability of supported configurations for TDCP reporting with CSI sub-configuration (s) . For example, referring to FIG. 5, the network entity 104 receives 505, from a UE 102, a UE capability for TDCP reporting with CSI sub-configuration (s) .
[0097] The network entity transmits 1310, to the UE, a configuration for a CSI report including one or more CSI report sub-configurations and CSI-RS resources. For example, referring to FIG. 5, the network entity 104 transmits 510, to the UE 102, a configuration for a CSI report including one or more CSI report sub-configurations and CSI-RS resources.
[0098] The network entity transmits 1320, to the UE, a signal triggering at least one of the one or more CSI report sub-configurations. For example, referring to FIG. 5, the network entity 104 transmits 520, to the UE 102, a signal (e.g., DCI) triggering at least one of the one or more CSI report sub-configurations.
[0099] The network entity transmits 1330, to the UE, CSI-RSs indicated by the at least one of the one or more CSI report sub-configurations. For example, referring to FIG. 5, the network entity 104 transmits 530, to the UE 102, CSI-RSs indicated by the at least one of the one or more CSI report sub-configurations.
[0100] The network entity receives 1350 from the UE, the CSI report based on the CSI-RSs, the CSI report including a TDCP report associated with the at least one of the one or more CSI report sub-configurations. For example, referring to FIG. 5, the network entity 104 receives 550, from the UE 102, the CSI report based on the CSI-RSs, the CSI report including a TDCP report associated with the at least one of the one or more CSI report sub-configurations.
[0101] FIG. 14 is a diagram 1400 illustrating an example of a hardware implementation for a UE apparatus 1402. The UE apparatus 1402 may be the UE 102, a component of the UE 102, or may implement UE functionality. The UE apparatus 1402 may include an application processor 1406, which may have on-chip memory 1406’ . In examples, 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 (s) module 1412, a power supply 1414, an additional module of memory 1416, a camera 1418, and / or other related components.
[0102] The UE apparatus 1402 may further include a wireless baseband processor 1426, which may be referred to as a modem. The wireless baseband processor 1426 may have on-chip memory 1426'. Along with, and similar to, the application processor 1406, the wireless baseband processor 1426 may also be coupled to the sensor (s) module 1412, the power supply 1414, the additional module of memory 1416, the camera 1418, and / or other related components. The wireless baseband processor 1426 may be additionally coupled to one or more subscriber identity module (SIM) card (s) 1420 and / or one or more transceivers 1430 (e.g., wireless RF transceivers) .
[0103] Within the one or more transceivers 1430, the UE apparatus 1402 may include a Bluetooth module 1432, a WLAN module 1434, an SPS module 1436 (e.g., 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, just a transmitter (TX) or just a receiver (RX) . The Bluetooth module 1432, the WLAN module 1434, the SPS module 1436, and the cellular module 1438 may each include dedicated antennas and / or utilize antennas 1440 for communication with one or more other nodes. For example, the UE apparatus 1402 can communicate through the transceiver (s) 1430 via the antennas 1440 with another UE (e.g., sidelink communication) and / or with a network entity 104 (e.g., uplink / downlink communication) , where the network entity 104 may correspond to a base station or a unit of the base station, such as the RU 106, the DU 108, or the CU 110.
[0104] The wireless baseband processor 1426 and the application processor 1406 may each include a computer-readable medium / memory 1426', 1406', respectively. The additional module of memory 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 execution of software stored on the computer-readable medium / memory 1426', 1406', 1416. The software, when executed by the wireless baseband processor 1426 / application processor 1406, causes the wireless baseband processor 1426 / application processor 1406 to perform the various functions described herein. The computer-readable medium / memory may also be used for storing data that is 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. The UE apparatus 1402 may be a processor chip (e.g., modem and / or application) and include just the wireless baseband processor 1426 and / or the application processor 1406. In other examples, the UE apparatus 1402 may be the entire UE 102 and include the additional modules of the apparatus 1402.
[0105] As discussed in FIG. 1 and implemented with respect to FIG. 12, the TDCP reporting component 140 is configured to receive, from a network entity 104, a configuration for a CSI report including one or more CSI report sub-configurations and CSI-RS resources; receive, from the network entity 104, a signal triggering at least one of the one or more CSI report sub-configurations; receive, from the network entity 104, CSI-RSs indicated by the at least one of the one or more CSI report sub-configurations; and transmit, to the network entity 104, the CSI report based on the CSI-RSs, the CSI report including a TDCP report associated with the at least one of the one or more CSI report sub-configurations.
[0106] The TDCP reporting component 140 may be within the application processor 1406 (e.g., at 140a) , the wireless baseband processor 1426 (e.g., at 140b) , or both the application processor 1406 and the wireless baseband processor 1426. The TDCP reporting component 140a-140b may be one or more hardware components specifically configured to carry out the stated processes / algorithm, implemented by one or more processors configured to perform the stated processes / algorithm, stored within a computer-readable medium for implementation by the one or more processors, or a combination thereof.
[0107] FIG. 15 is a diagram 1500 illustrating an example of a hardware implementation for 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 the RU 106, the DU, 108, or the 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 module of memory 1556 and / or a communications interface 1548, both of which may be coupled to the CU processor 1546. The CU 110 can communicate with the DU 108 through a midhaul link 162, such as an F1 interface between the communications interface 1548 of the CU 110 and a communications interface 1528 of the DU 108.
[0108] 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 module of memory 1536 and / or the communications interface 1528, both of which may be coupled to the DU processor 1526. The DU 108 can communicate with the RU 106 through a fronthaul link 160 between the communications interface 1528 of the DU 108 and a communications interface 1508 of the RU 106.
[0109] The RU 106 may include an RU processor 1506, which may have on-chip memory 1506'. In some aspects, the RU 106 may further include an additional module of memory 1516, the communications 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 antennas 1540, which may be coupled to the one or more transceivers 1530, such that the RU 106 can communicate through the one or more transceivers 1530 via the antennas 1540 with the UE 102.
[0110] The on-chip memory 1506', 1526', 1546' and the additional modules of memory 1516, 1536, 1556 may each be considered a computer-readable medium / memory. Each computer-readable medium / memory may be non-transitory. Each of the processors 1506, 1526, 1546 is responsible for general processing, including execution of software stored on the computer-readable medium / memory. The software, when executed by the corresponding processor (s) 1506, 1526, 1546 causes the processor (s) 1506, 1526, 1546 to perform the various functions described herein. The computer-readable medium / memory may also be used for storing data that is manipulated by the processor (s) 1506, 1526, 1546 when executing the software. In examples, the TDCP configuration component 150 may sit at any of the one or more network entities 104, such as at the CU 110; both the CU 110 and the DU 108; each of the CU 110, the DU 108, and the RU 106; the DU 108; both the DU 108 and the RU 106; or the RU 106.
[0111] As discussed in FIG. 1 and implemented with respect to FIG. 13 the TDCP configuration component 150 is configured to transmit, to a UE 102, a configuration for a CSI report including one or more CSI report sub-configurations and CSI-RS resources; transmit, to the UE 102, a signal triggering at least one of the one or more CSI report sub-configurations; transmit, to the UE 102, CSI-RSs indicated by the at least one of the one or more CSI report sub-configurations; and receive, from the UE 102, the CSI report based on the CSI-RSs, the CSI report including a TDCP report associated with the at least one of the one or more CSI report sub-configurations.
[0112] The TDCP configuration component 150 may be within one or more processors of the one or more network entities 104, such as the RU processor 1506 (e.g., at 150a) , the DU processor 1526 (e.g., at 150b) , and / or the CU processor 1546 (e.g., at 150c) . The TDCP configuration component 150a-150c may be one or more hardware components specifically configured to carry out the stated processes / algorithm, implemented by one or more processors 1506, 1526, 1546 configured to perform the stated processes / algorithm, stored within a computer-readable medium for implementation by the one or more processors 1506, 1526, 1546, or a combination thereof.
[0113] The specific order or hierarchy of blocks in the processes and flowcharts disclosed herein is an illustration of example approaches. Hence, 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 the diagrams. The accompanying method claims present elements of the various blocks in an example order, and are not limited to the specific order or hierarchy presented in the claims, processes, and flowcharts.
[0114] The detailed description set forth herein describes various configurations in connection with the drawings and does not represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough explanation of various concepts. However, these concepts may be practiced without these specific details. In some instances, well known structures and components are shown in block diagram form in order to avoid obscuring such concepts.
[0115] Aspects of wireless communication systems, such as telecommunication systems, are presented with reference to various apparatuses and methods. These apparatuses and methods are described in the following detailed description and are illustrated in the accompanying drawings by various blocks, components, circuits, processes, call flows, systems, algorithms, etc. (collectively referred to as “elements” ) . These elements may be implemented using electronic hardware, computer software, or combinations thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.
[0116] An element, or any portion of an element, or any combination of elements may be implemented as a “processing system” that includes 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 (SoC) , baseband processors, field programmable gate arrays (FPGAs) , programmable logic devices (PLDs) , state machines, gated logic, discrete hardware circuits, and other similar hardware configured to perform the various functionality described throughout this disclosure. One or more processors in the processing system may execute software, which may be referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, or any combination thereof.
[0117] If the functionality described herein is implemented in software, the functions may be stored on, or encoded as, one or more instructions or code on a computer-readable medium, such as a non-transitory computer-readable storage medium. Computer-readable media includes computer storage media and can include a random-access memory (RAM) , a read-only memory (ROM) , an 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 instructions or data structures that can be accessed by a computer. Storage media may be any available media that can be accessed by a computer.
[0118] Aspects, implementations, and / or use cases described herein may be implemented across many differing platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, the aspects, implementations, and / or use cases may come about via integrated chip implementations and other non-module-component based devices, such as end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchasing devices, medical devices, artificial intelligence (AI) -enabled devices, machine learning (ML) -enabled devices, etc. The aspects, implementations, and / or use cases may range from chip-level or modular components to non-modular or non-chip-level implementations, and further to aggregate, distributed, or original equipment manufacturer (OEM) devices or systems incorporating one or more techniques described herein.
[0119] Devices incorporating the aspects and features described herein may also include additional components and features for the implementation and practice of the claimed and described aspects and features. For example, transmission and reception of wireless signals necessarily includes a number of components for analog and digital purposes, such as hardware components, antennas, RF-chains, power amplifiers, modulators, buffers, processor (s) , interleavers, adders / summers, etc. Techniques described herein may be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, aggregated or disaggregated components, end-user devices, etc., of varying configurations.
[0120] The description herein is provided to enable a person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not limited to the aspects described herein, but are to be interpreted in view of the full scope of the present disclosure consistent with the language of the claims.
[0121] Reference to an element in the singular does not mean “one and only one” unless specifically stated, but rather “one or more. ” Terms such as “if, ” “when, ” and “while” do not imply an immediate temporal relationship or reaction. That is, these phrases, e.g., “when, ” do not imply an immediate action in response to or during the occurrence of an action, but simply imply that if a condition is met then an action will occur, but without requiring a specific or immediate time constraint for the action to occur. The terms “may” , “might” , and “can” , as used in this disclosure, often carry certain connotations. For example, “may” refers to a permissible feature that may or may not occur, “might” refers to a feature that probably occurs, and “can” refers to a capability (e.g., capable of) . The phrase “For example” often carries a similar connotation to “may” and, therefore, “may” is sometimes excluded from sentences that include “for example” or other similar phrases.
[0122] Unless specifically 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 and B and C, and may include multiples of A, multiples of B, and / or multiples of C, or may include A only, B only, or C only. Sets should be interpreted as a set of elements where the elements number one or more. Terms or articles such as “a” , “an” , and / or “the” may refer to one of an item, feature, element, etc., that the term or article precedes, or may refer to more than one of said item, feature, element, etc. that the term or article precedes. For example, the recitation “awidget” does not preclude reference to multiples of said widget, as “multiple widgets” necessarily includes “awidget” . Hence, the recitation “awidget” may be interpreted as “at least one widget” or, similarly, interpreted as “one or more widgets” .
[0123] Unless otherwise specifically indicated, ordinal terms such as “first” and “second” do not necessarily imply an order in time, sequence, numerical value, etc., but are used to distinguish between different instances of a term or phrase that follows each ordinal term. Reference numbers, as used in the specification and figures, are sometimes cross-referenced among drawings to denote same or similar features. A feature that is exactly the same in multiple drawings may be labeled with the same reference number in the multiple drawings. A feature that is similar among the multiple drawings, but not exactly the same, may be labeled with reference numbers that have different leading numbers, but have one or more of the same trailing numbers (e.g., 206, 306, 406, etc., may refer to similar features in the drawings) .
[0124] Structural and functional equivalents to elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are encompassed by the claims. The words “module, ” “mechanism, ” “element, ” “device, ” and the like may not be a substitute for the word “means. ” As such, no claim element is to be construed as a means plus function unless the element is expressly recited using the phrase “means for. ” As used herein, the phrase “based on” shall not be construed as a reference to a closed set of information, one or more conditions, one or more factors, or the like. In other words, the phrase “based on A” , where “A” may be information, a condition, a factor, or the like, shall be construed as “based at least on A” unless specifically recited differently.
[0125] The following examples are illustrative only and may be combined with other examples or teachings described herein, without limitation.
[0126] Example 1 is a method of wireless communication at a UE, comprising receiving, from a network entity, a configuration for a channel state information, CSI, report including one or more CSI report sub-configurations and CSI reference signal, CSI-RS, resources; receiving, from the network entity, a signal triggering at least one of the one or more CSI report sub-configurations; receiving, from the network entity, CSI-RSs indicated by the at least one of the one or more CSI report sub-configurations; and transmitting, to the network entity, the CSI report based on the CSI-RSs, the CSI report including a time domain channel property, TDCP, report associated with the at least one of the one or more CSI report sub-configurations.
[0127] Example 2 may be combined with Example 1 and includes the at least one of the one or more CSI report sub-configurations corresponds to at least one of: a first spatial domain-network energy saving, SD-NES, configuration; a second SD-NES configuration; or a power domain-network energy saving, PD-NES, configuration.
[0128] Example 3 may be combined with any of Examples 1-2 and further includes the first SD-NES configuration indicates a subset of antenna ports associated with the CSI-RSs; the second SD-NES configuration indicates a subset of antenna elements associated with the CSI-RSs; and the PD-NES indicates a power offset between the CSI-RSs and a physical downlink shared channel, PDSCH.
[0129] Example 4 may be combined with any of Examples 1-3 and further includes determining at least one of: an amplitude of a correlation between a first CSI-RS and a second CSI-RS for one or more delays; or a phase difference between the first CSI-RS and the second CSI-RS for the one or more delays, wherein: the configuration further indicates the one or more delays; and the TDCP report indicates at least one of: the amplitude of the correlation between the first CSI-RS and the second CSI-RS for the one or more delays; or the phase difference between the first CSI-RS and the second CSI-RS for the one or more delays.
[0130] Example 5 may be combined with any of Examples 1-4 and further includes the first CSI-RS comprises a first single port tracking reference signal, TRS, and the second CSI-RS comprises a second single port TRS.
[0131] Example 6 may be combined with any of Examples 1-5 and further includes the one or more delays comprise a whole number of symbols.
[0132] Example 7 may be combined with any of Examples 1-6 and further includes the receiving the CSI-RSs comprises receiving periodic CSI-RSs.
[0133] Example 8 may be combined with any of Examples 1-7 and further includes transmitting, to the network entity, a UE capability report indicating support for CSI reporting based on the at least one the one or more CSI report sub-configurations.
[0134] Example 9 may be combined with any of Examples 1-8 and further includes the CSI-RS resources comprise at least one CSI resource set.
[0135] Example 10 may be combined with any of Examples 1-9 and further includes the configuration comprises at least one of: a first bitmap indicating the CSI-RS resources; or a second bitmap indicating CSI resource sets associated with the CSI-RS resources.
[0136] Example 11 may be combined with any of Examples 1-10 and further includes the transmitting the CSI report comprises transmitting the CSI report after reception of at least one CSI-RS transmission occasion indicated in the at least one of the one or more CSI report sub-configurations and no later than a CSI reference resource.
[0137] Example 12 is a method of wireless communication at a network entity and includes transmitting, to a user equipment, UE, , a configuration for a channel state information, CSI, report comprising at least one CSI report sub-configuration indicating CSI reference signal, CSI-RS, resources; transmitting, to the UE, downlink control information, DCI, indicating a subset of the at least one CSI report sub-configurations; transmitting, to the UE, CSI-RSs indicated by the subset of the at least one CSI report sub-configurations; and receiving, from the UE, the CSI report comprising a time domain channel property, TDCP, report associated with the subset of the at least one CSI report sub-configurations.
[0138] Example 13 may be combined with Example 12 and further includes the at least one CSI report sub-configuration corresponds to at least one of: a first spatial domain-network energy saving, SD-NES, configuration; a second SD-NES configuration; or a power domain-network energy saving, PD-NES, configuration.
[0139] Example 14 may be combined with any of Examples 12-13 and further includes the first SD-NES configuration indicates a subset of antenna ports associated with the CSI-RSs; he second SD-NES configuration indicates a subset of antenna elements associated with the CSI-RSs; and the PD-NES indicates a power offset between the CSI-RSs and a physical downlink shared channel, PDSCH.
[0140] Example 15 may be combined with any of Examples 12-14 and further includes the configuration further indicates one or more delays; and the TDCP report indicates at least one of: an amplitude of a correlation between a first CSI-RS and a second CSI-RS for the one or more delays; or a phase difference between the first CSI-RS and the second CSI-RS for the one or more delays.
[0141] Example 16 may be combined with any of Examples 12-15 and further includes the CSI-RSs comprises a first single port tracking reference signal, TRS, and a second single port TRS.
[0142] Example 17 may be combined with any of Examples 12-16 and further includes the one or more delays comprise a whole number of symbols.
[0143] Example 18 may be combined with any of Examples 12-17 and further includes the transmitting the CSI-RSs comprises periodically transmitting the CSI-RSs.
[0144] Example 19 may be combined with any of Examples 12-18 and further includes receiving, from the UE, a UE capability report indicating support for CSI reporting based on the at least one CSI report sub-configuration.
[0145] Example 20 may be combined with any of Examples 12-19 and further includes the CSI-RS resources comprise at least one CSI resource set.
[0146] Example 21 may be combined with any of Examples 12-20 and further includes the configuration comprises at least one of: a first bitmap indicating the CSI-RS resources; or a second bitmap indicating CSI resource sets associated with the CSI-RS resources.
[0147] Example 22 may be combined with any of Examples 12-21 and further includes the receiving the CSI report comprises receiving the CSI report after transmitting at least one CSI-RS transmission occasion indicated in the subset of the at least one CSI report sub-configurations and no later than a CSI reference resource.
[0148] Example 23 is a method of wireless communication at a network entity, comprising transmitting, to a UE, a configuration for a channel state information, CSI, report comprising at least one CSI report sub-configuration indicating CSI reference signal, CSI-RS, resources, wherein the configuration comprises a report quantity including at least rank indicator, RI.
[0149] Example 24 is an apparatus for wireless communication for implementing a method as in any of Examples 1-23.
[0150] Example 25 is an apparatus for wireless communication including means for implementing a method as in any of Examples 1-23.
[0151] Example 26 is a non-transitory computer-readable medium storing computer executable code, the code when executed by a processor causes the processor to implement a method as in any of Examples 1-23.
Claims
1.A method of wireless communication performed by a user equipment, UE, (102) , the method comprising:receiving (510) , from a network entity (104) , a configuration for a channel state information, CSI, report including one or more CSI report sub-configurations and CSI reference signal, CSI-RS, resources;receiving (520) , from the network entity (104) , a signal triggering at least one of the one or more CSI report sub-configurations;receiving (530) , from the network entity (104) , CSI-RSs indicated by the at least one of the one or more CSI report sub-configurations; andtransmitting (550) , to the network entity (104) , the CSI report based on the CSI-RSs, the CSI report including a time domain channel property, TDCP, report associated with the at least one of the one or more CSI report sub-configurations.2.The method of claim 1, wherein the at least one of the one or more CSI report sub-configurations corresponds to at least one of:a first spatial domain-network energy saving, SD-NES, configuration;a second SD-NES configuration; ora power domain-network energy saving, PD-NES, configuration.3.The method of claim 2, wherein the first SD-NES configuration indicates a subset of antenna ports associated with the CSI-RSs;the second SD-NES configuration indicates a subset of antenna elements associated with the CSI-RSs; andthe PD-NES indicates a power offset between the CSI-RSs and a physical downlink shared channel, PDSCH.4.The method of any of claims 1 to 3, further comprising:determining at least one of:an amplitude of a correlation between a first CSI-RS and a second CSI-RS for one or more delays; ora phase difference between the first CSI-RS and the second CSI-RS for the one or more delays, wherein:the one or more CSI report sub-configurations further indicates the one or more delays; andthe TDCP report indicates at least one of:the amplitude of the correlation between the first CSI-RS and the second CSI-RS for the one or more delays; orthe phase difference between the first CSI-RS and the second CSI-RS for the one or more delays.5.The method of claim 4, wherein the first CSI-RS comprises a first single port tracking reference signal, TRS, and the second CSI-RS comprises a second single port TRS.6.The method of any of claims 1 to 5, wherein the receiving (530) the CSI-RSs comprises receiving (530) periodic CSI-RSs.7.The method of any of claims 1 to 6, further comprising:transmitting (505) , to the network entity (104) , a UE capability report indicating support for CSI reporting based on the at least one the one or more CSI report sub-configurations.8.The method of any of claims 1 to 7, wherein the CSI-RS resources comprise at least one CSI resource set.9.The method of any of claims 1 to 8, wherein the configuration comprises at least one of:a first bitmap indicating the CSI-RS resources; ora second bitmap indicating CSI resource sets associated with the CSI-RS resources.10.The method of any of claims 1 to 9, wherein the transmitting (550) the CSI report comprises transmitting (550) the CSI report after reception of at least one CSI-RS transmission occasion indicated in the at least one of the one or more CSI report sub-configurations and no later than a CSI reference resource.11.A method of wireless communication performed by a network entity (104) , the method comprising:transmitting (510) , to a user equipment, UE, (102) , a configuration for a channel state information, CSI, report including one or more CSI report sub-configurations and CSI reference signal, CSI-RS, resources;transmitting (520) , to the UE (102) , a signal triggering at least one of the one or more CSI report sub-configurations;transmitting (530) , to the UE (102) , CSI-RSs indicated by the at least one of the one or more CSI report sub-configurations; andreceiving (550) , from the UE (102) , the CSI report based on the CSI-RSs, the CSI report including a time domain channel property, TDCP, report associated with the at least one of the one or more CSI report sub-configurations.12.The method of claim 11, wherein the at least one of the one or more CSI report sub-configurations corresponds to at least one of:a first spatial domain-network energy saving, SD-NES, configuration;a second SD-NES configuration; ora power domain-network energy saving, PD-NES, configuration.13.The method of claim 12, wherein the first SD-NES configuration indicates a subset of antenna ports associated with the CSI-RSs;the second SD-NES configuration indicates a subset of antenna elements associated with the CSI-RSs; andthe PD-NES indicates a power offset between the CSI-RSs and a physical downlink shared channel, PDSCH.14.The method of any of claims 11 to 13, wherein the CSI-RSs comprises a first single port tracking reference signal, TRS, and a second single port TRS.15.An apparatus for wireless communication comprising a transceiver, a memory, and a processor coupled to the transceiver and the memory and configured to implement a method as in any of claims 1-14.
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