Method for beam prediction feedback
Machine learning-based beam prediction feedback methods enable optimized beamforming by predicting and reporting optimal beams, addressing the limitations of existing CSI report configurations and enhancing signal quality and network efficiency.
Patent Information
- Application Number
- PCT/CN2024/084899
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-10-02
AI Technical Summary
Existing CSI report configurations in wireless communications do not adequately include beam prediction information or allow for beam prediction feedback, limiting the ability to enhance signal quality and strength through optimized beamforming.
Implementing machine learning or artificial intelligence-based methods for reporting beam prediction feedback, where a user equipment measures and predicts optimal beams using synchronization signal blocks or channel state information-reference signals, and transmits beam prediction reports to a network entity, including additional information such as predicted reference signal received power, confidence indicators, and beam probability indicators.
Enhances signal quality and strength by enabling proactive beam prediction and optimization, improving network efficiency and adaptability to environmental and dynamic changes through spatial and time-domain beamforming techniques.
Smart Images

Figure CN2024084899_02102025_PF_FP_ABST
Abstract
Description
METHOD FOR BEAM PREDICTION FEEDBACKFIELD
[0001] This disclosure relates generally to wireless communications and, more particularly, to reporting information for beamforming.BACKGROUND
[0002] This background description is provided for the purpose of generally presenting the context of the disclosure. Work of the presently named inventors, to the extent as described in this background section, as well as aspects of the description that may not otherwise qualify as prior art at the time of filing, is neither expressly nor impliedly admitted as prior art against the present disclosure.
[0003] A network entity may configure a report configuration for a user equipment (UE) to report channel state information (CSI) . In a CSI report, the UE may transmit, to the network entity, at least one of: a rank indicator (RI) , a precoder matrix indicator (PMI) , a channel quality indicator (CQI) , or a layer indicator (LI) . RI and PMI are used to indicate the digital precoder. CQI is used to indicate the signal-to-interference plus noise (SINR) status, for assisting the network entity to determine the modulation and coding scheme (MCS) . LI is used to identify the strongest layer for the reported precoder indicated by RI and PMI.
[0004] When reporting the CSI by long Physical Uplink Control Channel (PUCCH) (e.g., PUCCH with 4 or more symbols) or Physical Uplink Shared Channel (PUSCH) , the UE transmits the RI and CQI for the first codeword on CSI part 1 and the remaining components of the CSI report on CSI part 2. The payload size for the CSI components in CSI part 1 is often fixed and the payload size for the CSI components in CSI part 2 may vary, depending on the value of RI reported in CSI part 1.
[0005] The network entity may also configure a CSI report configuration for a UE to report the layer 1 reference signal received power (L1-RSRP) or layer 1 signal-to-interference plus noise ratio (L1-SINR) for one or multiple synchronization signal block (SSB) resources or channel state information-reference signal (CSI-RS) resources. The UE reports the SSB resource index indicators (SSBRIs) or CSI-RS resource indicators (CRIs) and the corresponding L1-RSRP or L1-SINR in CSI part 1.
[0006] Currently, the UE reports RI, PMI, CQI, and LI based on actual measurements of signals transmitted from the network entity, such as measurements of SSBs or CSI-RSs. As such, the existing CSI report configuration may not be capable of including beam prediction information, or properly allowing the UE to transmit beam prediction feedback.SUMMARY
[0007] The present disclosure provides methods, systems, and techniques for reporting beam prediction feedback for channel state information (CSI) using machine learning (ML) or artificial intelligence (AI) based models. Beamforming allows for transmission and reception of signals / channels in specific directions that enhance and / or optimize signal quality and strength. A network entity may transmit multiple synchronization signal blocks (SSBs) or channel state information-reference signals (CSI-RSs) via multiple beams (e.g., beam sweeping) . A user equipment (UE) measures the signal quality of received beams based on the SSBs or CSI-RSs and reports the measurement results (e.g., feedback) to the network entity. The network entity may select the best beam based on the feedback of the beam measurement. The present disclosure provides methods for beam prediction feedback in a spatial-domain or time-domain such that the UE measures a subset of all the beams from the network entity when predicting an optimal beam to be used between the network entity and the UE.
[0008] According to general aspects of this disclosure, a method for wireless communications by a user equipment (UE) includes receiving, from a network entity, a report configuration to configure a beam prediction report including a beam indicator (BI) , the report configuration configuring at least one of a synchronization signal block (SSB) resource set or a channel state information-reference signal (CSI-RS) resource set for channel measurement. The UE receives, from the network entity and based on the report configuration, one or more transmission occasions of the at least one of the SSB resource set or the CSI-RS resource set. The UE selectively transmits the beam prediction report including the BI predicted based on the one or more transmission occasions and a validation procedure associated with the beam prediction report.
[0009] In aspects, the UE transmits, to the network entity, a message indicating at least one of the following capabilities of the UE: beam prediction in spatial-domain; beam prediction in time-domain and a supported window length for the beam prediction in the time-domain; joint beam prediction in both the spatial-domain and the time-domain; reporting at least one of: a predicted reference signal received power (P-RSRP) , a beam probability indicator (BPI) , a confidence indicator (CI) , a supported maximum number of predicted beams for the spatial-domain, or a supported maximum number of predicted beams for the time-domain; a maximum number of SSBs or the CSI-RS resource sets per beam prediction report; or a maximum number of beam report configurations.
[0010] In aspects, the report configuration configures SSB resources or CSI-RS resources based on at least one of: a same time-domain behavior; a same serving cell index; a same periodicity; a burst periodicity; or a same periodicity in a burst transmission.
[0011] In aspects, the report configuration configures a subset of the SSB resources or CSI-RS resources having at least one of the following quasi-co-location (QCL) parameters in common: an average delay; a delay spread; a Doppler spread; a Doppler shift; spatial reception parameter; an average gain; an antenna port; or a beam identifier.
[0012] In aspects, the report configuration further configures a time restriction for channel measurement, wherein the one or more transmission occasions are determined based on the time restriction.
[0013] In aspects, the validation procedure is based on at least one of: a number of actually received transmission occasions of the SSB resource set or CSI-RS resource set; a discontinuous reception (DRX) configuration; a predicted slot for beam prediction; a slot for transmitting the beam prediction report; a minimum processing delay for the beam prediction report; a number of occupied CSI processing units (CPUs) ; a number of occupied extended CPUs (eCPUs) ; a maximum number of CPUs; or a maximum number of eCPUs.
[0014] In aspects, the UE determines a priority of the beam prediction report and respective priorities of other types of reports to be transmitted to the network entity; and transmits the beam prediction report based on a priority rule between the beam prediction report and the other types of reports.
[0015] In some cases, the UE multiplexes the beam prediction report and one or more of the other types of reports based on the priority of the beam prediction report and respective priorities of the other types of reports.
[0016] In aspects, the UE detects a collision in time-domain between the beam prediction report on physical uplink control channel (PUCCH) or on physical uplink shared channel (PUSCH) transmission and a sounding reference signal (SRS) ; and responsive to the detecting the collision, drops the beam prediction report or the SRS based on a priority rule.
[0017] In aspects, the UE receives, from the network entity, a reference transmission power; and calculates a predicted reference signal received power (P-RSRP) of a predicted beam based on the reference transmission power.
[0018] In aspects, the beam prediction report further includes at least one of: a number of predicted beams; one or more predicted slots; BI for each of the predicted beams; one or more P-RSRPs for a subset or all of the predicted beams; one or more beam probability indicators (BPIs) for a subset or all of the predicted beams; or one or more confidence indicators (CIs) for a subset or all the predicted beams.
[0019] In aspects, selectively transmitting the beam prediction report includes at least one of: using CSI part 1 on PUCCH or PUSCH to carry the beam prediction report; using one or more PUCCH resources to carry the beam prediction report; or using CSI part 1 on PUCCH or PUSCH to carry a first portion of the beam prediction report and using CSI part 2 on PUCCH or PUSCH to carry a second portion of the beam prediction report.
[0020] According to general aspects of this disclosure, a method for wireless communications by a network entity, the method includes transmitting, to a UE, a report configuration to configure a beam prediction report including a BI, the report configuration configuring at least one of a SSB resource set or a CSI-RS resource set for channel measurement. The network entity then transmits, to the UE, one or more transmission occasions of the at least one of the SSB resource set or the CSI-RS resource set. The network entity receives the beam prediction report including the BI predicted based on the one or more transmission occasions and a validation procedure associated with the beam prediction report.
[0021] In aspects, the report configuration further configures a time restriction for channel measurement, wherein the one or more transmission occasions are determined based on the time restriction.
[0022] In aspects, the beam prediction report comprises at least one of the following information: a number of predicted beams; one or more predicted slots; BI for each of the predicted beams; one or more P-RSRPs for a subset or all of the predicted beams; one or more beam probability indicators (BPIs) for a subset or all of the predicted beams; or one or more confidence indicators (CIs) for a subset or all the predicted beams.
[0023] According to general aspects of this disclosure, an apparatus includes one or more radio frequency (RF) modems; a processor coupled to the one or more RF modems; and at least one memory storing executable instructions. The executable instructions manipulate at least one of the processor or the one or more RF modems to perform the above methods, which are discussed in details herein.BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Fig. 1 illustrates a diagram of a wireless communications system that includes multiple user equipments (UEs) and network entities in communication over one or more cells, according to aspects of this disclosure.
[0025] Fig. 2a illustrates an example diagram of performing beam prediction in spatial domain using a beam prediction model, in accordance with aspects of this disclosure.
[0026] Fig. 2b illustrates an example diagram of performing beam prediction in time domain using a beam prediction model, in accordance with aspects of this disclosure.
[0027] Fig. 3 illustrates an example diagram of providing a beam prediction report, in accordance with aspects of this disclosure.
[0028] Fig. 4 illustrates an example diagram of UE behavior in providing a beam prediction report, in accordance with aspects of this disclosure.
[0029] Fig. 5 illustrates an example diagram of network entity behavior in configuring and receiving a beam prediction report, in accordance with aspects of this disclosure.
[0030] Fig. 6a illustrates an example of a burst based synchronization signal block (SSB) or channel state information-reference signal (CSI-RS) transmission, in accordance with aspects of this disclosure.
[0031] Fig. 6b illustrates an example of a burst-like transmission based on multiple SSB or CSI-RS resources with the same beam, in accordance with aspects of this disclosure.
[0032] Fig. 7 illustrates an example for the SSB or CSI-RS measurement behavior with regard to time restriction, in accordance with aspects of this disclosure.
[0033] Fig. 8a illustrates an example for the beam prediction report dropping based on the measured transmission occasions of SSB or CSI-RS, in accordance with aspects of this disclosure.
[0034] Fig. 8b illustrates another example for the beam prediction report dropping based on the measured transmission occasions of SSB or CSI-RS, in accordance with aspects of this disclosure.
[0035] Fig. 9a illustrates an example for predicted beam report based on predicted slot, in accordance with aspects of this disclosure.
[0036] Fig. 9b illustrates an example for predicted slot identification based on the transmission occasion of the SSB or CSI-RS, in accordance with aspects of this disclosure.
[0037] Fig. 9c illustrates an example for predicted slot identification based on the CSI reference resource, in accordance with aspects of this disclosure.
[0038] Fig. 9d illustrates another example for predicted slot identification based on the CSI reference resource, in accordance with aspects of this disclosure.
[0039] Fig. 10 illustrates an example flowchart of a method performed by a UE, in accordance with aspects of this disclosure.
[0040] Fig. 11 illustrates an example flowchart of a method performed by a network entity, in accordance with aspects of this disclosure.
[0041] Fig. 12 is a diagram illustrating a hardware implementation for an example UE apparatus.
[0042] Fig. 13 is a diagram illustrating a hardware implementation for one or more example network entities.
[0043] Like numerals indicate like elements.DETAILED DESCRIPTION
[0044] The present disclosure provides methods, systems, and techniques for reporting beam prediction feedback for channel state information (CSI) using machine learning or artificial intelligence. Beamforming allows for transmission and reception of signals / channels in specific directions that enhance and / or optimize signal quality and strength. A network entity may transmit multiple synchronization signal blocks (SSBs) or channel state information-reference signals (CSI-RSs) via multiple beams (e.g., beam sweeping) . A user equipment (UE) measures the signal quality of received beams based on the SSBs or CSI-RSs and reports the measurement results (e.g., feedback) to the network entity. The network entity may select the best beam based on the feedback of the beam measurement. The present disclosure provides methods for beam prediction feedback in a spatial-domain or time-domain such that the UE measures a subset of all the beams from the network entity when predicting an optimal beam to be used between the network entity and the UE.
[0045] Reporting the predicted beam (s) may include additional information over conventional CSI report. For example, a UE may compute or predict beams based on a set of measured beams, thus requiring the beam prediction report to include additional information. For example, in spatial domain beam prediction, a network entity transmits SSBs or CSI-RSs in a first set of beams. A UE predicts a second set of beams (that likely include a best beam) based on the first set of beams. In time domain beam prediction, the UE predicts a new set of beams in the future based on a previous set of beams in the past. When the UE reports the predicted set of beams, additional information such as the predicted beam indicator (BI) , predicted reference signal received power (P-RSRP) , confidence indicator (CI) , and beam probability indicator (BPI) may be included. Various examples of reporting such predicted beams are disclosed herein.
[0046] For example, aspects of this disclosure include methods for verifying conditions for transmitting beam prediction report such that the information provided in the beam prediction report is valid (e.g., a validation procedure) . The conditions may relate to SSB or CSI-RS measurement status, processing delay and scheduling offset status, CSI processing unit (CPU) status, collision with other uplink signals, and other conditions. Furthermore, the disclosure provides for calculation of P-RSRP when the network entity transmits SSB and / or CSI-RS at different power levels. The disclosure also provides methods for determining predicted slots for time-domain beam prediction. With regard to a large number of predicted beams and / or predicted slots, a large payload size of the beam prediction report may result. Accordingly, the disclosure provides methods for transmitting such a large beam prediction report in multiple parts (e.g., CSI part 1, and / or part 2) in the physical uplink control channel (PUCCH) or the physical uplink shared channel (PUSCH) .
[0047] Aspects of this disclosure for determining and transmitting beam prediction feedback include a wireless communication method by a UE. The example method includes receiving, from a network entity, a report configuration to configure a beam prediction report including a beam indicator (BI) , the report configuration configuring at least one of a synchronization signal block (SSB) resource set or a channel state information reference signal (CSI-RS) resource set for channel measurement. The method further includes receiving, from the network entity and based on the report configuration, one or more transmission occasions of the at least one of the SSB resource set or the CSI-RS resource set. The method further includes transmitting the beam prediction report including the BI predicted based on the one or more transmission occasions and a validation procedure associated with the beam prediction report.
[0048] Complimentary aspects of the disclosure include an example method of configuring and receiving beam prediction report by a network entity. The example method includes transmitting, to a UE, a report configuration to configure a beam prediction report including a BI, the report configuration configuring at least one of an SSB resource set or a CSI-RS resource set for channel measurement. The method further includes transmitting, to the UE, one or more transmission occasions of the at least one of the SSB resource set or the CSI-RS resource set for channel measurement. The network entity then receives the beam prediction report including the BI predicted based on the one or more transmission occasions and a validation procedure associated with the beam prediction report.
[0049] Fig. 1 illustrates a diagram 100 of a wireless communications system associated with multiple 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 may 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) .
[0050] Operations of the base station (BS) 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 may enable flexibility in network designs. The various units of the disaggregated base station architecture, or the disaggregated RAN architecture, may be configured for wired or wireless communication with at least one other unit. For example, the base stations (BSs) 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 BSs 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 / BSs 104.
[0051] 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 may 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 BS 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 BS 104e of the cell 190e via cross-cell communication beams 136-138 of the RU 106a and the BS 104e.
[0052] 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.
[0053] 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 may control both real-time and non-real-time features of control plane and user plane communications of the RUs 106.
[0054] Any combination of the RU 106, the DU 108, and the CU 110, or reference thereto individually, may correspond to a BS 104. Thus, the BS 104 may include at least one of the RU 106, the DU 108, or the CU 110. The BSs 104 provide the UEs 102 with access to a core network. The BSs 104 may relay communications between the UEs 102 and the core network (not shown) . The BSs 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. ”
[0055] Transmissions from a UE 102 to a BS 104 / RU 106 are referred to as uplink (UL) transmissions, whereas transmissions from the BS 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 BS 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 BS 104d / RU 106d.
[0056] Communication links between the UEs 102 and the BSs 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 BSs 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) .
[0057] 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.
[0058] The UEs 102 and the BSs 104 / RUs 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, 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 BSs 104 / RUs 106 may or may not be the same.
[0059] In further examples, beamformed signals may be communicated between a first base station / RU 106a and a second BS 104e. For instance, the BS 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 BS 104e. The RU 106a may receive the beamformed signal from the BS 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 BS 104e transmits a downlink beamformed signal to the UE 102e based on the communication beams 138 in one or more transmit directions of the BS 104e. The UE 102e receives the downlink beamformed signal from the BS 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 BS 104e based on the UE communication beams 130 in one or more transmit directions of the UE 102e, such that the BS 104e may receive the uplink beamformed signal from the UE 102e in one or more receive directions of the BS 104e.
[0060] The BS 104 may include and / or be referred to as a network entity. That is, “network entity” may refer to the BS 104 or at least one unit of the BS 104, such as the RU 106, the DU 108, and / or the CU 110. The BS 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 BS 104 or an entity at the BS 104 may 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 BS 104e and the base station / RU 106a. In such cases, the BS 104e may be a master node and the base station / RU 160a may be a secondary node.
[0061] 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 BSs 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.
[0062] In Fig. 1, any of the UEs 102 may include a beam prediction report component 140 configured to receive, from a network entity 104, a report configuration to configure a beam prediction report including a BI, the report configuration configuring at least one of a SSB resource set or a CSI-RS resource set for channel measurement. The beam prediction report component 140 is further configured to receive, from the network entity and based on the report configuration, one or more transmission occasions of the at least one of the SSB resource set or the CSI-RS resource set. The beam prediction report component 140 selectively transmits the beam prediction report including the BI predicted based on the one or more transmission occasions and a validation procedure associated with the beam prediction report. The BS 104 includes a report configuration component 150 configured to perform complementary operations of the example methods herein with the beam prediction report component 140.
[0063] 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.
[0064] Fig. 2a illustrates an example diagram 200 of performing beam prediction in spatial domain using a beam prediction model, in accordance with aspects of this disclosure. As shown, the network entity may transmit SSBs or CSI-RSs using various beams 215. The UE measures a first set of beams 210. Based on the beam measurements, the UE may use a prediction model 220 (e.g., a trained machine learning model) to predict a second set of beams 230, which may include an optimal beam different from the actually measured beams 210. For example, to identify the best network beam, the measurement results, e.g., L1-RSRP of a first set of network beams 210, such as the four beams associated with four SSBs or CSI-RSs, are used as the input for the prediction model 220.
[0065] The prediction model 220 calculates or predicts a second set of network beams 230 that have the highest possibility to be the best beams (e.g., signal quality and strength between the network entity and the UE) . In some cases, the UE may include dedicated hardware (e.g., a ML / AI processing unit) to execute the prediction model 220. In some cases, the UE may utilize external resources (e.g., remote hardware in connection with the UE) to execute the prediction model 220. Upon predicting the second set of network beams 230, the UE may perform a second-step beam measurement (not shown) based on the predicted second set of network beams 230 to identify the best network beam.
[0066] SSBs include a set of signals for initial access and may include primary synchronization signal (PSS) , secondary synchronization signal (SSS) , and the physical broadcast channel (PBCH) . SSBs allow UEs to synchronize with the network in time and frequency, identify the cell, and obtain important system information needed for accessing the network. In some cases, the network may perform periodic transmission of the SSBs in bursts. CSI-RSs include a set of reference signals for the UEs to measure channel quality and report the measurements to the network entity. Based on the measurement reports, the network entity determines the channel condition to a specific UE and may adjust or select transmission parameters for communication with the specific UE. In this disclosure, SSBs and CSI-RSs (e.g., referred to as SSB / CSI-RS) are used as examples, but other signals for synchronization or channel measurement may be used as well (e.g., in various configuration, measurement, and reporting examples) .
[0067] In some embodiments, using machine learning (ML) or artificial intelligence (AI) for beam prediction improves network efficiency by proactively adjusting beamforming and predicting the optimal beam paths based on environment’s impact on signal propagation, such as reflection, diffraction, and scattering caused by buildings, terrain, and other obstacles. The prediction model 220 may account for environmental modeling, CSI, UE mobility prediction, beam steering and management, among other variables. The prediction model 220 may include a pretrained ML / AI model that continuously collects and updates environmental data, CSI, and UE mobility information. In some cases, the prediction model 220 may implement a feedback mechanism based on actual measurements to evaluate, verify, refine, improve, or update the prediction information.
[0068] Fig. 2b illustrates an example diagram of performing beam prediction in time domain using a beam prediction model, in accordance with aspects of this disclosure. As shown, the network entity may transmit SSBs or CSI-RSs using various beams 215 from slot n-ss (or “n-s_S” ) 240 to slot n-s1 (or “n-s_1” ) 245. For each slot, the UE measures a first set of beams 210 for slot 240, and a first set off beams 215 for slot 245. Based on the beam measurements, the UE may use the prediction model 225 (e.g., a trained ML / AI model) to predict respective second set of beams 250 for slot n+q1 (or “n+q_1” ) 260, and second set of beams 255 for slot n+qQ (or “n_q_Q” ) 265, and the slots therebetween. For example, to identify the best network beams in time-domain, the measurement results, e.g., the L1-RSRP for the beams in a first set of time instances in the past, e.g., beam report in slot n-ss 240, n-ss-1, …, n-s1 245, the ML model may be used to predict the beams in the second set of time instances in the future, e.g., predicted sets of beams 250 and 255 (and others not labeled) in future slots n+q1 260, n+q2, …, n+qQ 265.
[0069] In some embodiments, using ML or AI for beam prediction in time domain may leverage historical data and predictive analytics. The prediction model 225 for time-domain beam prediction may emphasize on historical data availability and quality when compared to non-time-domain beam prediction models (e.g., spatial domain only) . The time-domain beam prediction may adapt to changes in UE behavior, network configuration, physical obstructions, and other dynamic factors that vary in time.
[0070] Based on the spatial-domain and / or time-domain beam prediction, the UE may report the predicted beam information for K beams for X slots (e.g., K and X being variable integers) . The beam information may include at least one of the following: beam identifier or beam indicator (BI) ; predicted RSRP (P-RSRP) ; beam probability indicator (BPI) indicating the probability for the beam to be the best beam; confidence indicator (CI) indicating the possible prediction error for the P-RSRP. The existing technical specifications do not specify how these beam prediction information may be transmitted from the UE to the network entity. The present disclosure provides methods and solutions for sending the beam prediction report or feedback from the UE to the network entity to enable ML or AI leveraged beamforming.
[0071] Fig. 3 illustrates an example diagram 300 of providing a beam prediction report, in accordance with aspects of this disclosure. As shown, the UE 102 may optionally transmit 302 the UE capability to the network entity 104, indicating the supported configuration (s) for beam prediction report. In some cases, the beam prediction report may be a CSI report (or a variation or derivative thereof) that includes beam prediction information. For example, the UE may send to the network entity 104 at least one of the following UE capabilities: whether the UE 102 supports beam prediction report based on spatial-domain beam prediction; whether the UE 102 supports beam prediction report based on time-domain beam prediction; whether the UE 102 supports beam prediction report based on joint spatial-domain and time-domain beam prediction; whether the UE 102 supports P-RSRP / BPI / CI report; the supported maximum number of predicted beams for spatial-domain and / or time-domain beam prediction; the supported predicted window length for time-domain beam prediction; the supported maximum number of configured SSB or CSI-RS resources per CSI report for beam prediction; the supported maximum number of CSI report configurations for beam prediction.
[0072] Based on the UE capability, the network entity 104 transmits 304 control signaling to configure at least one beam prediction report configuration in the UE 102. For example, the control signaling may be Radio Resource Control (RRC) signaling, e.g., RRCReconfiguration, which configures a CSI report configuration for beam prediction report. The RRC signaling may configure at least one SSB / CSI-RS resource set as channel measurement resource (CMR) . The network entity 104 may optionally configure, by the control signaling, the time measurement restriction, the predicted slot identification scheme, and / or collision handling scheme between the beam prediction report and another uplink signal.
[0073] The network entity 104 transmits 306 the SSB / CSI-RS resources to the UE 102 for channel measurement. The SSB / CSI-RS resources for channel measurement may be transmitted in one or more transmission occasions. For semi-persistent or aperiodic beam prediction report, the network entity 104 may further transmit 308 a Medium Access Control (MAC) Control Element (CE) or Downlink Control Information (DCI) triggering the configured CSI report configuration (s) for beam prediction report.
[0074] The UE 102 transmits 310 the beam prediction report via a physical uplink shared channel (PUSCH) or physical uplink control channel (PUCCH) based on the received one or multiple transmission occasions of the SSB / CSI-RS resources for channel measurement, CPU occupancy status, and collision handling with another signal (s) .
[0075] Fig. 4 illustrates an example diagram 400 of UE behavior in providing a beam prediction report, in accordance with aspects of this disclosure. As shown, the UE may optionally transmit 402 a UE capability indicating the supported configuration (s) for beam prediction report. The UE receives 404 control signaling configuring at least one beam prediction report configuration including at least one set of SSB / CSI-RS resources for channel measurement. The control signaling may optionally configure the time measurement restriction, the predicted slot identification scheme, and / or collision handling scheme between the beam prediction report and another uplink signal. The UE receives 406 SSB / CSI-RS for channel measurement. In some cases, the UE optionally receives 408 a MAC CE or DCI triggering the configured CSI report configuration (s) for the beam prediction report. Based on the received one or multiple transmission occasions of the SSB / CSI-RS resources for channel measurement, CPU occupancy status, and / or collision handling with another signal (s) , the UE transmits 410 the beam prediction report to the network entity via the PUCCH or PUSCH.
[0076] Fig. 5 illustrates an example diagram 500 of network entity behavior in configuring and receiving a beam prediction report, in accordance with aspects of this disclosure. The network entity behavior corresponds to the UE behavior shown in Fig. 4. As shown, the network entity may optionally receive 502 a UE capability indicating the supported configuration (s) for beam prediction report. The network entity transmits 504 control signaling configuring at least one beam prediction report configuration including at least one set of SSB / CSI-RS resources for channel measurement. The control signaling may optionally configure the time measurement restriction, the predicted slot identification scheme, and / or collision handling scheme between the beam prediction report and another uplink signal. The network entity transmits 506 SSB / CSI-RS to the UE for channel measurement. In some cases, the network entity optionally transmits 508 a MAC CE or DCI triggering the configured CSI report configuration (s) for the beam prediction report. The network entity receives 510 the beam prediction report on PUCCH or PUSCH from the UE. The beam prediction report is generated based on the one or multiple transmission occasions of the SSB / CSI-RS resources for channel measurement, CPU occupancy status, and / or collision handling with another signal (s) .
[0077] In this disclosure, unless specified, a RRC signaling may indicate a RRC reconfiguration message from the network entity to UE, or a system information block (SIB) , where the SIB may be an existing SIB (e.g., SIB1) or a new SIB (e.g., SIB J, where J is an integer above 21) transmitted by the network entity. In some implementations, the network entity receives the UE capability from a core network (e.g., Access and Mobility Management Function (AMF) ) . In yet some other implementations, the network entity receives the UE capability from another network entity (e.g., gNB or eNB) .
[0078] Fig. 6a illustrates an example 600 of a burst based SSB or CSI-RS transmission, in accordance with aspects of this disclosure. As shown, the network entity 104 transmits a first SSB / CSI-RS 610 based on a first beam, and a second SSB / CSI-RS 620 based on a second beam to the UE. The network entity 104 may configure at least one of the followings for a burst based SSB or CSI-RS transmission: the burst periodicity 640, the periodicity / interval 630, slot offset for each SSB or CSI-RS within a burst, and / or the duration for each burst. The network entity may configure the on-duration for the SSB or CSI-RS, which configures when the network entity 104 transmits the SSB or CSI-RS. Thus, the UE can monitor or receive the SSB or CSI-RS in the on-duration. The network entity 104 may configure the off-duration for the SSB or CSI-RS, which configures when the network entity 104 does not transmit the SSB or CSI-RS. Thus, the UE does not monitor or receive the SSB or CSI-RS in the off-duration and may determine the resource elements or resource blocks for the SSB or CSI-RS in the off-duration are available for rate matching for physical downlink control channel (PDCCH) and / or physical downlink shared channel (PDSCH) . The network entity 104 may configure such burst based SSB or CSI-RS resources for time-domain beam prediction.
[0079] In the example 600 of Fig. 6a, the network entity 104 may configure a set of SSB or CSI-RS resources for channel measurement in the CSI report configuration for a beam prediction report. The network entity 104 may configure the SSB or CSI-RS resources based on the same time-domain behavior and / or periodicity. The network entity 104 may transmit the SSB or CSI-RS resources within Q slots. Q may be predefined, e.g., Q=2. Alternatively, Q may be reported by the UE capability. The network entity 104 may transmit the SSB or CSI-RS resources on the same serving cell or different serving cells.
[0080] Fig. 6b illustrates an example 650 of a burst-like transmission based on multiple SSB or CSI-RS resources with the same beam, in accordance with aspects of this disclosure. Compared to the example 600, in the example 650, transmissions based on each of the first beam and the second beam include multiple SSB / CSI-RS resources, such as three SSB / CSI-RS 652, 656, and 660 for transmission based on the first beam, and three SSB / CSI-RS 654, 658, and 662 for transmission based on the second beam.
[0081] In the example 650, the network entity 104 configures multiple SSB / CSI-RS resources based on the same antenna port or beam or beam ID or same QCL parameters including one or multiple parameters of average delay, delay spread, Doppler spread, Doppler shift, spatial reception parameter or average gain. Then the UE may measure the L1-RSRP for one beam based on multiple SSB / CSI-RS resources (e.g., 652, 656, and 660) . Then the network entity 104 may transmit the reference signals with different beams in a burst like structure. Similar to the example 600, the network entity 104 may configure the burst periodicity 640 and the periodicity / interval 630 and slot offset for each SSB or CSI-RS within a burst. The network entity 104 may configure such burst based SSB or CSI-RS resources for time-domain beam prediction.
[0082] Fig. 7 illustrates an example 700 for the SSB or CSI-RS measurement behavior with regard to time restriction, in accordance with aspects of this disclosure. In some implementations, the network entity 104 may configure the time restriction for channel measurement, e.g., timeRestrictionForChannelMeasurements, in the configuration for the beam prediction report (e.g., a CSI report configuration) . If the higher layer parameter timeRestrictionForChannelMeasurements in CSI-ReportConfig is set to "notConfigured" , the UE shall derive the channel measurements for computing beam prediction reported in uplink slot n based on only the SSB or non-zero power (NZP) CSI-RS, no later than the CSI reference resource, associated with the CSI resource setting. If the higher layer parameter timeRestrictionForChannelMeasurements in CSI-ReportConfig is set to "Configured" , the UE shall derive the channel measurements for computing beam prediction reported in uplink slot n based on only the most recent, no later than the CSI reference resource, Y occasions of the SSB or NZP CSI-RS associated with the CSI resource setting.
[0083] As shown in the example 700 of Fig. 7, the network entity configures time restriction 730 regarding the SSB / CSI-RS used for measurement for beam prediction. The UE receives the SSB / CSI-RS 710 and 715 for measurement with regard to time restriction when occasions Y = 2. By contrast, without the time restriction, the UE may use a longer time period 740 of SSB / CSI-RS for beam prediction measurement. For example, the network entity 104 may refrain from configuring the time restriction for channel measurement, e.g., timeRestrictionForChannelMeasurements, as “configured” or “notConfigured” in the CSI report configuration for beam prediction report. Thus, the UE may not expect the network entity 104 configure timeRestrictionForChannelMeasurements, as “configured” or “notConfigured” in the CSI report configuration for beam prediction report. In some other implementations, the UE may ignore the configuration of the time restriction for channel measurement in the CSI report configuration for beam prediction report. Following the CSI reference resource 720, the UE transmits the beam prediction report 725.
[0084] Fig. 8a illustrates an example 800 for the beam prediction report dropping based on the measured transmission occasions of SSB or CSI-RS, in accordance with aspects of this disclosure. As shown, after the CSI report (re) configuration, serving cell activation, BWP change, or activation of SP-CSI, the UE reports a beam prediction report (e.g., a CSI report for beam prediction feedback) , e.g., with reportQuantity including at least a BI, only after receiving at least M SSB or CSI-RS transmission occasion of each SSB or CSI-RS resource for channel measurement no later than CSI reference resource and within the discontinuous reception (DRX) active time 830, when DRX is configured, and drops the report otherwise. As shown in the example 800 of Fig. 8a, if the number of SSB or CSI-RS transmission occasions is greater than one (e.g., CSI-RS resources 810 and 815 during the DRX active time 830 and not including the CSI-RS resources 812 and 817 during the DRX inactive time 840) , then the beam prediction report 825 is dropped, otherwise, the beam prediction report 825 is transmitted.
[0085] In some embodiments, the UE may transmit the beam prediction report 825 if the UE receives at least M transmission occasions for each SSB / CSI-RS resources 810 and 815 before the CSI reference resource 820. Otherwise, if the UE does not receive at least M transmission occasions, the UE may drop the beam prediction report 825 or transmit an outdated beam prediction report 825.
[0086] In some embodiments, the value of M may be predefined, e.g., M = 1. In some embodiments, the value of M may be reported by UE capability, or configured by the network entity 104. In some embodiments, the UE may determine the value of M based on the type of beam prediction report, e.g., whether the beam prediction report is for future slots or not, such as, whether the beam prediction report is based on time-domain beam prediction or spatial-domain beam prediction. In such cases, the UE may determine a first value of M if the beam prediction report is for future slots, and if the beam prediction report is not for future slots, the UE may determine a second value of M. The first and / or second value may be predefined, reported by UE capability, or configured by the network entity.
[0087] Fig. 8b illustrates an example 850 for the beam prediction report dropping based on the measured transmission occasions of SSB or CSI-RS and the offset between the last transmission occasion and the beam prediction report, in accordance with aspects of this disclosure. As shown, compared to the example 800, an offset 842 between the second CSI-RS resource 815 in the DRX active time 830 and the beam prediction report 825 is illustrated. In the example 850, the UE may determine to transmit the beam prediction report 825 if the UE receives at least M transmission occasions for each SSB / CSI-RS resources 810 or 815 before the CSI reference resource 820 and the offset 842 between the last transmission occasion 815 and the beam prediction report 825 is no more than Y slots, the UE may drop the beam prediction report 825 or transmit an outdated beam prediction report otherwise. The value of Y may indicate the minimum beam prediction length in time domain for time-domain beam prediction.
[0088] In an example, after the CSI report (re) configuration, serving cell activation, BWP change, or activation of SP-CSI, the UE reports a CSI report for beam prediction report, e.g., with reportQuantity including at least BI, only after receiving at least M SSB or CSI-RS transmission occasion (s) of each SSB or CSI-RS resource for channel measurement no later than CSI reference resource and within the discontinuous reception (DRX) active time, when DRX is configured, and offset between the last transmission occasion of the first or last SSB or CSI-RS and the first slot of the PUCCH or PUSCH for the beam prediction report is no more than Y slots or milliseconds and drops the report otherwise. In some embodiments, the value of Y may be predefined, e.g., 10, or reported by the UE capability, or configured by the network entity 104, e.g., based on a separate parameter or the periodicity for the SSB / CSI-RS.
[0089] In an embodiment, the CSI reference resource for a beam prediction report is based on the minimum delay for beam prediction report and the first slot of the beam prediction report.
[0090] In one example, in the time domain, the CSI reference resource for a beam prediction report in uplink slot n'is defined by a single downlink slot where Koffset is a parameter configured by higher layer (e.g., as specified in clause 4.2 of 3rd Generation Partnership Project (3GPP) Technical Specification (TS) 38.213) , and where is the subcarrier spacing configuration for Koffset with a value of 0 for frequency range 1, where and μDLand μUL are the subcarrier spacing configurations for DL and UL, respectively, and and μoffset are determined by higher-layer configured ca-SlotOffset for the cells transmitting the uplink and downlink (e.g., as defined in clause 4.5 of 3GPP TS 38.211) .
[0091] For periodic and semi-persistent CSI reporting, nCSI_ref is the smallest value greater than or equal to a threshold, which may be predefined, e.g., or reported by the UE capability or configured by the network entity 104, such that it corresponds to a valid downlink slot.
[0092] For aperiodic CSI reporting, if the UE is indicated by the DCI to report CSI in the same slot as the CSI request, nCSI_ref is such that the reference resource is in the same valid downlink slot as the corresponding CSI request, otherwise nCSI_ref is the smallest value greater than or equal to such that slot n-nCSI_ref corresponds to a valid downlink slot, where Z'corresponds to the delay requirement for beam prediction report.
[0093] In some implementations, the value of Z'may be pre-defined or reported by the UE or configured by the network entity 104 or determined based on at least one of the followings: (1) the number of measured SSB / CSI-RS resources, (2) the number of predicted beams, (3) report quantity, e.g., whether P-RSRP is reported or not, or (4) the number of predicted slots.
[0094] In some implementations, the minimum delay between the last symbol of the PDCCH triggering the aperiodic beam prediction report and the first symbol of the PUSCH with the triggered aperiodic beam prediction report (Z) , may be determined as Z'+ q, where q may be pre-defined or reported by UE capability.
[0095] In some implementations, the UE may report the outdated beam prediction or drop the beam prediction report, if the scheduling offset does not meet the Z or Z’ requirement.
[0096] In an embodiment, the network entity and UE may determine the number of CSI processing units (CPUs) for a beam prediction report based on at least one of: a pre-defined value (e.g., 1) , a UE capability, or based on the number of predicted slots.
[0097] The network entity and UE may determine the number of extended CPUs (eCPUs) based on a pre-defined value, e.g., 1, or a UE capability, or based on the number of predicted slots, and / or the report content. In some implementations, the UE may perform the beam prediction for each predicted slot based on an independent AI / ML model. Then the number of eCPUs could be the same as the number of predicted slots. In some other implementations, the UE may perform the beam prediction for all the predicted slots based on a single AI / ML model. Then the number of eCPUs could be 1. In some other implementations, the UE may perform the beam prediction for a subset of predicted slots based on an independent AI / ML model. Then the number of eCPUs could be the number of predicted slots multiplied by a scaling factor.
[0098] If the total number of CPUs across all the CSI / L1-RSRP / L1-SINR / beam prediction reports exceeds the maximum number of CPUs, or the total number of eCPUs across all the CSI / L1-RSRP / L1-SINR / beam prediction reports exceeds the maximum number of eCPUs, the UE may report the outdated CSI / L1-RSRP / L1-SINR / beam prediction in the report with lower priority or drop the report with lower priority. In an embodiment, the network entity and UE may determine the priority for the CSI report with one CSI or multiple CSIs based on at least one of the following: (1) the time-domain behavior for the CSI report (e.g., aperiodic, semi-persistent, or periodic) ; (2) serving cell index for the SSB / CSI-RS for channel measurement or the serving cell with the CSI report configuration configured; (3) report content, e.g., CSI / L1-RSRP / L1-SINR / beam prediction report; or (4) CSI report configuration identifier (ID) .
[0099] In some implementations, the priority of beam prediction report is higher than the priority of L1-RSRP / L1-SINR report and CSI report.
[0100] In a first example, the network entity and UE determine the priority for a CSI report as follows. The priority for a first CSI report is higher than the priority of a CSI report if the value of PriiCSI (y, k, c, s) is lower.
[0101] CSI reports are associated with a priority value PriiCSI (y, k, c, s)=2·Ncells·Ms·y+Ncells·Ms·k+Ms·c+s
[0102] where:
[0103] y=0 for aperiodic CSI reports to be carried on PUSCH y=1 for semi-persistent CSI reports to be carried on PUSCH, y=2 for semi-persistent CSI reports to be carried on PUCCH and y=3 for periodic CSI reports to be carried on PUCCH;
[0104] k = 0 for CSI reports carrying BI, k=1 for CSI reports carrying L1-RSRP or L1-SINR and k=2 for CSI reports not carrying L1-RSRP or L1-SINR;
[0105] c is the serving cell index and Ncells is the value of the higher layer parameter maxNrofServingCells; for a CSI report configured with LTM-CSI-ReportConfig, c is the serving cell index value where the report configuration is configured;
[0106] s is the reportConfigID and Msis the value of the higher layer parameter maxNrofCSI-ReportConfigurations for a CSI report configured with CSI-ReportConfig. For a CSI report configured with LTM-CSI-ReportConfig, s is the LTM-CSI-ReportConfigID and Ms is the value of the higher layer parameter maxNrofLTM-CSI-ReportConfigurations.
[0107] In some other implementations, the priority of beam prediction report is the same as the priority of L1-RSRP / L1-SINR report.
[0108] In a second example, the network entity and UE determine the priority for a CSI report as follows. The priority for a first CSI report is higher than the priority of a CSI report if the value of PriiCSI (y, k, c, s) is lower.
[0109] CSI reports are associated with a priority value PriiCSI (y, k, c, s)=2·Ncells·Ms·y+Ncells·Ms·k+Ms·c+s
[0110] where
[0111] y=0 for aperiodic CSI reports to be carried on PUSCH y=1 for semi-persistent CSI reports to be carried on PUSCH, y=2 for semi-persistent CSI reports to be carried on PUCCH and y=3 for periodic CSI reports to be carried on PUCCH;
[0112] k = 0 for CSI reports carrying L1-RSRP or L1-SINR or BI, and k=1 for CSI reports not carrying L1-RSRP or L1-SINR;
[0113] c is the serving cell index and Ncells is the value of the higher layer parameter maxNrofServingCells; for a CSI report configured with LTM-CSI-ReportConfig, c is the serving cell index value where the report configuration is configured;
[0114] s is the reportConfigID and Msis the value of the higher layer parameter maxNrofCSI-ReportConfigurations for a CSI report configured with CSI-ReportConfig. For a CSI report configured with LTM-CSI-ReportConfig, s is the LTM-CSI-ReportConfigID and Ms is the value of the higher layer parameter maxNrofLTM-CSI-ReportConfigurations.
[0115] In some other implementations, the priority of beam prediction report is the same as the priority of CSI report.
[0116] In a third example, the network entity and UE determine the priority for a CSI report as follows. The priority for a first CSI report is higher than the priority of a CSI report if the value of PriiCSI (y, k, c, s) is lower.
[0117] CSI reports are associated with a priority value PriiCSI (y, k, c, s)=2·Ncells·Ms·y+Ncells·Ms·k+Ms·c+s
[0118] where
[0119] y=0 for aperiodic CSI reports to be carried on PUSCH y=1 for semi-persistent CSI reports to be carried on PUSCH, y=2 for semi-persistent CSI reports to be carried on PUCCH and y=3 for periodic CSI reports to be carried on PUCCH;
[0120] k = 0 for CSI reports carrying L1-RSRP or L1-SINR, and k=1 for CSI reports not carrying L1-RSRP or L1-SINR;
[0121] c is the serving cell index and Ncells is the value of the higher layer parameter maxNrofServingCells; for a CSI report configured with LTM-CSI-ReportConfig, c is the serving cell index value where the report configuration is configured;
[0122] s is the reportConfigID and Msis the value of the higher layer parameter maxNrofCSI-ReportConfigurations for a CSI report configured with CSI-ReportConfig. For a CSI report configured with LTM-CSI-ReportConfig, s is the LTM-CSI-ReportConfigID and Ms is the value of the higher layer parameter maxNrofLTM-CSI-ReportConfigurations.
[0123] In some other implementations, the priority of beam prediction report is lower than the priority of CSI report.
[0124] In a fourth example, the network entity and UE determine the priority for a CSI report as follows. The priority for a first CSI report is higher than the priority of a CSI report if the value of PriiCSI (y, k, c, s) is lower.
[0125] CSI reports are associated with a priority value PriiCSI (y, k, c, s)=2·Ncells·Ms·y+Ncells·Ms·k+Ms·c+s
[0126] where
[0127] y=0 for aperiodic CSI reports to be carried on PUSCH y=1 for semi-persistent CSI reports to be carried on PUSCH, y=2 for semi-persistent CSI reports to be carried on PUCCH and y=3 for periodic CSI reports to be carried on PUCCH;
[0128] k=0 for CSI reports carrying L1-RSRP or L1-SINR, k=1 for CSI reports not carrying L1-RSRP or L1-SINR or BI, and k=2 for CSI reports carrying BI;
[0129] c is the serving cell index and Ncells is the value of the higher layer parameter maxNrofServingCells; for a CSI report configured with LTM-CSI-ReportConfig, c is the serving cell index value where the report configuration is configured;
[0130] s is the reportConfigID and Msis the value of the higher layer parameter maxNrofCSI-ReportConfigurations for a CSI report configured with CSI-ReportConfig. For a CSI report configured with LTM-CSI-ReportConfig, s is the LTM-CSI-ReportConfigID and Ms is the value of the higher layer parameter maxNrofLTM-CSI-ReportConfigurations.
[0131] In some other implementations, the beam prediction report is always with a higher or lower priority than other CSI report. In one example, the network entity may configure the beam prediction report and other CSI report based on different types of CSI report configurations. The network entity may configure the beam prediction report by AI-ML-CSI-ReportConfig, the CSI / L1-RSRP / L1-SINR report based on CSI-ReportConfig, and the report for lower layer triggered mobility (LTM) based on LTM-CSI-ReportConfig.
[0132] Deferent priority orders may correspond to different examples. In one example, a CSI report configured with AI-ML-CSI-ReportConfig has a higher priority over all CSI report (s) configured with LTM-CSI-ReportConfig irrespective of PriiCSI (y, k, c, s) value in case of collision with CSI report (s) configured with LTM-CSI-ReportConfig. In another example, a CSI report configured with AI-ML-CSI-ReportConfig has a lower priority over all CSI report (s) configured with CSI-ReportConfig irrespective of PriiCSI (y, k, c, s) value in case of collision with CSI report (s) configured with CSI-ReportConfig. In another example, a CSI report configured with AI-ML-CSI-ReportConfig has a higher priority over all CSI report (s) configured with CSI-ReportConfig irrespective of PriiCSI (y, k, c, s) value in case of collision with CSI report (s) configured with CSI-ReportConfig, and a lower priority over all CSI report (s) configured with LTM-CSI-ReportConfig irrespective of PriiCSI (y, k, c, s) value in case of collision with CSI report (s) configured with LTM-CSI-ReportConfig. A CSI report configured with LTM-CSI-ReportConfig has a higher priority over all CSI report (s) configured with CSI-ReportConfig irrespective of PriiCSI (y, k, c, s) value in case of collision with CSI report (s) configured with CSI-ReportConfig. In some other implementations, the priority for the beam prediction report, CSI report configuration and / or LTM report configuration may be configured by the network entity.
[0133] In a fifth example, the network entity and UE determine the priority for a beam prediction report as follows. The priority for a first beam prediction report is higher than the priority of a beam prediction report if the value of PriiCSI (y, k, c, s) is lower.
[0134] CSI reports are associated with a priority value PriiCSI (y, k, c, s) =2·Ncells·Ms·y+Ncells·Ms·k+Ms·c+s
[0135] where
[0136] y=0 for aperiodic CSI reports to be carried on PUSCH y=1 for semi-persistent CSI reports to be carried on PUSCH, y=2 for semi-persistent CSI reports to be carried on PUCCH and y=3 for periodic CSI reports to be carried on PUCCH;
[0137] k=0 for CSI reports carrying L1-RSRP or L1-SINR, k=1 for CSI reports not carrying L1-RSRP or L1-SINR;
[0138] c is the serving cell index and Ncells is the value of the higher layer parameter maxNrofServingCells; for a CSI report configured with LTM-CSI-ReportConfig, c is the serving cell index value where the report configuration is configured; for a CSI report configured with AI-ML-CSI-ReportConfig, c is the serving cell index value where the report configuration is configured or the serving cell index where the channel measurement resource is transmitted;
[0139] s is the reportConfigID and Msis the value of the higher layer parameter maxNrofCSI-ReportConfigurations for a CSI report configured with CSI-ReportConfig. For a CSI report configured with LTM-CSI-ReportConfig, s is the LTM-CSI-ReportConfigID and Ms is the value of the higher layer parameter maxNrofLTM-CSI-ReportConfigurations. For a CSI report configured with AI-ML-CSI-ReportConfig, s is the AI-ML-CSI-ReportConfigID and Ms is the value of the higher layer parameter maxNrofAI-ML-CSI-ReportConfigurations.
[0140] In an embodiment, if a first PUCCH or PUSCH with the beam prediction report collides with a second PUCCH or PUSCH for another CSI report in time domain in the same serving cell, the UE may drop the one with lower priority, and transmit the one with higher priority. The UE may determine the priority for the beam prediction report and another CSI report based on the embodiment in the last section above.
[0141] In some implementations, the UE may drop one of the PUCCHs / PUSCHs if the PUCCH / PUSCH corresponds to the same UE panel, e.g., the same TCI state or control resource set (CORESET) pool index and the UE supports simultaneous multi-panel transmission; the UE may transmit both PUCCHs / PUSCHs, otherwise.
[0142] In an embodiment, if a first PUCCH or PUSCH with the beam prediction report collides with a second PUCCH or PUSCH for another CSI report in time domain in the same serving cell, the UE may multiplex the beam prediction report and another CSI report based on their priority and transmit the multiplexed report by the first or second PUCCH or PUSCH, or a third PUCCH or PUSCH configured by the network entity . The UE may determine the priority for multiplexing of the beam prediction report and another CSI report based on the embodiment in the last section above.
[0143] In some implementations, the UE may multiplex the beam prediction report and other CSI report on one of the PUCCHs / PUSCHs if the PUCCH / PUSCH corresponds to the same UE panel, e.g., the same TCI state or control resource set (CORESET) pool index and the UE supports simultaneous multi-panel transmission; the UE may transmit both PUCCHs / PUSCHs, otherwise.
[0144] In an embodiment, the network entity may configure whether to multiplex or drop the CSI and beam prediction report. In one example, the network entity may configure to multiplex the CSI and beam prediction report by a configuring a list of PUCCH resources, e.g., multi-CSI-PUCCH-ResourceList. Then when overlapping happens, the UE multiplexes all CSI report (s) and beam prediction report (s) in a resource from the resources provided by multi-CSI-PUCCH-ResourceList. If the network entity 104 does not configure the PUCCH resource list for CSI and beam prediction report multiplexing, e.g., multi-CSI-PUCCH-ResourceList, the UE transmits the CSI or beam prediction report with highest priority.
[0145] In an embodiment, if a first PUCCH or PUSCH with the beam prediction report collides with an SRS or the guard period (GP) of SRS for carrier switching, e.g., GP for RF returning, in time domain in the same serving cell, the UE may drop the PUCCH or SRS. The dropping priority may be predefined, or configured by the network entity, or determined based on the time-domain behavior of the SRS.
[0146] In one example, for PUCCH and SRS on the same carrier, a UE shall not transmit SRS when semi-persistent or periodic SRS is configured in the same symbol (s) with PUCCH carrying only CSI report (s) , or only L1-RSRP report (s) , or only L1-SINR report (s) or only beam prediction report (s) . A UE shall not transmit SRS when semi-persistent or periodic SRS is configured or aperiodic SRS is triggered to be transmitted in the same symbol (s) with PUCCH carrying HARQ-ACK, link recovery request (e.g., as defined in clause 9.2.4 of 3GPP TS 38.213) and / or scheduling request (SR) . In the case that SRS is not transmitted due to overlap with PUCCH, only the SRS symbol (s) that overlap with PUCCH symbol (s) are dropped. PUCCH shall not be transmitted when aperiodic SRS is triggered to be transmitted to overlap in the same symbol with PUCCH carrying semi-persistent / periodic CSI report (s) or semi-persistent / periodic L1-RSRP report (s) only, or only L1-SINR report (s) , or only beam prediction report (s) .
[0147] In another example, for PUCCH and SRS on the same carrier, a UE shall not transmit SRS when semi-persistent or periodic SRS is configured in the same symbol (s) with PUCCH carrying only CSI report (s) , L1-RSRP report (s) , L1-SINR report (s) and / or beam prediction report (s) . A UE shall not transmit SRS when semi-persistent or periodic SRS is configured or aperiodic SRS is triggered to be transmitted in the same symbol (s) with PUCCH carrying HARQ-ACK, link recovery request (e.g., as defined in clause 9.2.4 of 3GPP TS 38.213) and / or SR. In the case that SRS is not transmitted due to overlap with PUCCH, only the SRS symbol (s) that overlap with PUCCH symbol (s) are dropped. PUCCH shall not be transmitted when aperiodic SRS is triggered to be transmitted to overlap in the same symbol with PUCCH carrying only semi-persistent / periodic CSI report (s) , semi-persistent / periodic L1-RSRP report (s) , L1-SINR report (s) , and / or beam prediction report (s) .
[0148] In another example, for PUCCH and SRS on the same carrier, a UE shall not transmit SRS when semi-persistent or periodic SRS is configured in the same symbol (s) with PUCCH that does not carry any of HARQ-ACK, link recovery request (e.g., as defined in clause 9.2.4 of 3GPP TS 38.213) or SR. A UE shall not transmit SRS when semi-persistent or periodic SRS is configured or aperiodic SRS is triggered to be transmitted in the same symbol (s) with PUCCH carrying HARQ-ACK, link recovery request (e.g., as defined in clause 9.2.4 of 3GPP TS 38.213) and / or SR. In the case that SRS is not transmitted due to overlap with PUCCH, only the SRS symbol (s) that overlap with PUCCH symbol (s) are dropped. PUCCH shall not be transmitted when aperiodic SRS is triggered to be transmitted to overlap in the same symbol with PUCCH that does not carry any of HARQ-ACK, link recovery request (e.g., as defined in clause 9.2.4 of 3GPP TS 38.213) or SR.
[0149] In another example, for PUCCH and SRS on the same carrier, a UE shall not transmit SRS when semi-persistent or periodic SRS is configured in the same symbol (s) with PUCCH carrying only CSI report (s) , or only L1-RSRP report (s) , or only L1-SINR report (s) . A UE shall not transmit SRS when semi-persistent or periodic SRS is configured or aperiodic SRS is triggered to be transmitted in the same symbol (s) with PUCCH carrying HARQ-ACK, link recovery request (e.g., as defined in clause 9.2.4 of 3GPP TS 38.213) , beam prediction information, and / or SR. In the case that SRS is not transmitted due to overlap with PUCCH, only the SRS symbol (s) that overlap with PUCCH symbol (s) are dropped. PUCCH shall not be transmitted when aperiodic SRS is triggered to be transmitted to overlap in the same symbol with PUCCH carrying semi-persistent / periodic CSI report (s) or semi-persistent / periodic L1-RSRP report (s) only, or only L1-SINR report (s) .
[0150] In another example, the UE shall drop PUCCH / PUSCH transmission carrying periodic / semi-persistent CSI comprising only CQI / PMI / L1-RSRP / L1-SINR / beam prediction information, and / or SRS transmission on a carrier of a serving cell in set S (c2) configured for PUSCH / PUCCH transmission whenever the transmission and SRS transmission (including any interruption due to uplink or downlink RF retuning time as defined by higher layer parameters switchingTimeUL and switchingTimeDL of SRS-SwitchingTimeNR) on the carrier of the serving cell c2 happen to overlap in the same symbol. The UE shall drop PUSCH transmission carrying aperiodic CSI comprising only CQI / PMI / L1-RSRP / L1-SINR / beam prediction information on a carrier of a serving cell in set S (c2) whenever the transmission and aperiodic SRS transmission (including any interruption due to uplink or downlink RF retuning time) as defined by higher layer parameters switchingTimeUL and switchingTimeDL of SRS-SwitchingTimeNR) on the carrier of the serving cell c2 happen to overlap in the same symbol. The serving cell S (c2) (e.g., as defined in 3GPP TS 38.214 section 6.2.1.3) may indicate the impacted serving cells for SRS carrier switching.
[0151] In an embodiment, the UE may transmit the beam prediction report by a MAC CE. The UE may multiplex the beam prediction report MAC CE and other logical channels based on a pre-defined or configured priority.
[0152] In one example, the priority for the MAC CE for beam prediction report is the same as one type of the logical channels, e.g., MAC CE for buffer status report (BSR) . Different priority orders correspond to different examples. Logical channels may be prioritized in accordance with the following order (highest priority listed first) , where references for abbreviations or acronyms are provided in 3GPP TS 38.321:
[0153] ● MAC CE for cell radio network temporary identifier (C-RNTI) , or data from uplink common control channel (UL-CCCH)
[0154] ● MAC CE for (Enhanced) beam failure recovery (BFR) , or MAC CE for Configured Grant Confirmation, or MAC CE for Multiple Entry Configured Grant Confirmation
[0155] ● MAC CE for Sidelink Configured Grant Confirmation
[0156] ● MAC CE for listen-before-talk (LBT) failure
[0157] ● MAC CE for Timing Advance Report
[0158] ● MAC CE for sidelink buffer status report (SL-BSR) prioritized according to clause 5.22.1.6
[0159] ● MAC CE for (Extended) BSR, with exception of BSR included for padding, or MAC CE for beam prediction report
[0160] ● MAC CE for (Enhanced) Single Entry power headroom report (PHR) , or MAC CE for (Enhanced) Multiple Entry PHR
[0161] ● MAC CE for Positioning Measurement Gap Activation / Deactivation Request
[0162] ● MAC CE for the number of Desired Guard Symbols
[0163] ● MAC CE for Case-6 Timing Request
[0164] ● MAC CE for (Extended) Pre-emptive BSR
[0165] ● MAC CE for SL-BSR, with exception of SL-BSR prioritized according to clause 5.22.1.6 and SL-BSR included for padding
[0166] ● MAC CE for integrated access backhaul-multi hop relay (IAB-MT)
[0167] Recommended Beam Indication, or MAC CE for Desired IAB-MT PSD range, or MAC CE for Desired DL Tx Power Adjustment
[0168] ● data from any Logical Channel, except data from UL-CCCH
[0169] ● MAC CE for Recommended bit rate query
[0170] ● MAC CE for BSR included for padding
[0171] ● MAC CE for SL-BSR included for padding
[0172] In another example, the priority for the MAC CE for beam prediction report is different from any type of the logical channels. Different priority orders correspond to different examples. Logical channels shall be prioritized in accordance with the following order (highest priority listed first) , where the abbreviations are defined in 3GPP TS 38.321:
[0173] ● MAC CE for C-RNTI, or data from UL-CCCH
[0174] ● MAC CE for (Enhanced) BFR, or MAC CE for Configured Grant Confirmation, or MAC CE for Multiple Entry Configured Grant Confirmation
[0175] ● MAC CE for Sidelink Configured Grant Confirmation
[0176] ● MAC CE for LBT failure
[0177] ● MAC CE for Timing Advance Report
[0178] ● MAC CE for SL-BSR prioritized according to clause 5.22.1.6
[0179] ● MAC CE for (Extended) BSR, with exception of BSR included for padding
[0180] ● MAC CE for beam prediction report
[0181] ● MAC CE for (Enhanced) Single Entry PHR, or MAC CE for (Enhanced) Multiple Entry PHR
[0182] ● MAC CE for Positioning Measurement Gap Activation / Deactivation Request
[0183] ● MAC CE for the number of Desired Guard Symbols
[0184] ● MAC CE for Case-6 Timing Request
[0185] ● MAC CE for (Extended) Pre-emptive BSR
[0186] ● MAC CE for SL-BSR, with exception of SL-BSR prioritized according to clause 5.22.1.6 and SL-BSR included for padding
[0187] ● MAC CE for IAB-MT Recommended Beam Indication, or MAC CE for Desired IAB-MT PSD range, or MAC CE for Desired DL Tx Power Adjustment
[0188] ● data from any Logical Channel, except data from UL-CCCH
[0189] ● MAC CE for Recommended bit rate query
[0190] ● MAC CE for BSR included for padding
[0191] ● MAC CE for SL-BSR included for padding
[0192] In an embodiment, the network entity 104 may transmit the SSB / CSI-RS resources for channel measurement based on different transmission power. The network entity may configure the transmission power for one or multiple SSBs and configure the power offset between the CSI-RS and SSB for each CSI-RS resource.
[0193] The UE may calculate the P-RSRP based on a reference transmission power and the actual transmission power for the SSB / CSI-RS resources for channel measurement. In one example, the UE may use the measured RSRP + power offset between the reference transmission power and the actual transmission power for the SSB / CSI-RS resources as the AI / ML model input.
[0194] The reference transmission power may be pre-defined, e.g., 0 dBm or 40 dBm, or configured by the network entity, e.g., transmission for an SSB or transmission power for one of the SSB / CSI-RS resources for channel measurement, e.g., the minimum or maximum or average transmission power for the SSB / CSI-RS resources for channel measurement, or reported by the UE in the beam prediction report or UE capability.
[0195] In some other implementations, the network entity 104 shall transmit the SSB / CSI-RS resources for channel measurement based on the same transmission power. Thus, the network entity 104 should configure the same transmission power for the SSB / CSI-RS. Then the UE should calculate the P-RSRP based on the actual transmission power for the SSB / CSI-RS. Thus, in this case, the reference transmission power is the same as the actual transmission power.
[0196] The UE may quantize and report the P-RSRP based on the reference transmission power. In one example, the network entity and UE may determine the range of the P-RSRP based on the reference transmission power. The range and / or step size for the P-RSRP may be pre-defined or configured by the network entity. The UE may report the P-RSRP based on linear or non-linear quantization. In one example, the P-RSRP quantization range may be based on {reference transmission power + [-160, -64] } dBm and the step size may be 1 or 2 or 3 dB.
[0197] Fig. 9a illustrates an example 900 for beam prediction report based on predicted slot, in accordance with aspects of this disclosure. In the example 900, the network entity may configure one or multiple prediction window sizes. In other cases, the one or multiple prediction window sizes may be pre-defined or reported by the UE capability, or provided by the beam prediction report. The network entity and UE may identify the predicted slot (s) based on the prediction window (s) , a reference starting point, CSI reference resource, and / or the beam prediction report slot (s) .
[0198] As shown in the example 900 of Fig. 9a, after receiving the SSB / CSI-RS 910 and 920, and the CSI reference resource 930, the UE reports the predicted beam information 940 for all the predicted slots 935 and 945. In some other implementations, the UE may optionally report the predicted beam information 940 for the predicted slots that are after the CSI reference resource 930 or after the first or last beam prediction report slot (s) 935 or 945, as shown in Figure 9a. In some implementations, the UE may drop the report of the predicted beam information 940. In some other implementations, the UE may report the predicted beam information 940 for the predicted slot 945 only. In some other implementations, the UE may report the predicted beam information 940 for the predicted slots 935 and 945.
[0199] Fig. 9b illustrates an example 933 for predicted slot identification based on the transmission occasion of the SSB or CSI-RS, in accordance with aspects of this disclosure. In the example 933, the reference starting point to determine the predicted slot (s) 935 or 945 may be the last transmission occasion of one of the SSB / CSI-RS resource 920, e.g., the first or last one in time domain, before the CSI reference resource 930. The last transmission occasion may indicate the transmission occasion with all the SSB / CSI-RS resources are before the CSI reference resource 930. When DRX is configured, the last transmission occasion may indicate the transmission occasion with all the SSB / CSI-RS resources are within the DRX active time.
[0200] As shown in the example 933, the first predicted slot 935 may be identified based on the first predicted window 925 and the last transmission occasion of the SSB / CSI-RS 920. Similarly, the second predicted slot 945 may be identified based on the second predicted window 927 and the last transmission occasion of the SSB / CSI-RS 920. The UE may optionally report the predicted beam information 940 for the predicted slots that are after the CSI reference resource 930 or after the first or last beam prediction report slot (s) 935 or 945. In some implementations, the UE may drop the report of the predicted beam information 940. In some other implementations, the UE may report the predicted beam information 940 for the predicted slot 945 only. In some other implementations, the UE may report the predicted beam information 940 for the predicted slots 935 and 945.
[0201] Fig. 9c illustrates an example 960 for predicted slot identification based on the CSI reference resource, in accordance with aspects of this disclosure. In the example 960, the reference starting point to determine the predicted slot (s) 935 or 945 may be the CSI reference resource 930. As shown, compared to the example 933, instead of identifying the predicted slots based on the last transmission occasion of SSB / CSI-RS, the predicted slots 935 and 945 are identified based on the respective predicted windows 925 and 927 referenced with respect to the CSI reference resource 930.
[0202] Fig. 9d illustrates an example 990 for predicted slot identification based on the CSI reference resource, in accordance with aspects of this disclosure. In the example 990, the reference starting point to determine the predicted slot (s) 935 or 945 may be one of the beam prediction report slot (s) , e.g., the first or last slot for the beam prediction report 940. As a result of beam prediction and CSI multiplexing, the UE transmits the beam prediction report 940 by a second PUCCH or PUSCH resource different from a first PUCCH or PUSCH configured for beam prediction report before the multiplexing. The UE may determine the reference starting point based on the first or the second PUCCH or PUSCH. As shown in the example 990, the predicted slots 935 and 945 are identified or determined based on the respective predicted windows 925 and 927 referenced with respect to the slot of the beam prediction report 940.
[0203] In some implementations, the network entity may configure the reference starting point for predicted slot identification. The network entity may transmit the configuration by RRC signaling, MAC CE or DCI. In one example, the network entity may configure the reference starting point for periodic beam prediction report by an RRC parameter in the CSI report configuration for beam prediction report. In another example, the network entity may configure the reference starting point for semi-persistent beam prediction report by MAC CE activating the CSI report configuration for beam prediction report. In another example, the network entity may configure the reference starting point for aperiodic beam prediction report by DCI triggering the CSI report configuration for beam prediction report, e.g., different reference starting point may correspond to different aperiodic CSI triggering states. The UE may report the UE capability indicating the supported reference starting point (s) and / or predicted window size (s) . In some other implementations, the UE may report the reference starting point and / or predicted window size (s) in the beam prediction report.
[0204] In an embodiment, the UE transmits the beam prediction report in CSI part 1 on PUCCH or PUSCH if / when the UE is configured to transmit the beam prediction report on long PUCCH (e.g., PUCCH with 4 or more symbols) or PUSCH. For example, the beam prediction report including BI (as well as other beam prediction information) of predicted beams may be transmitted along with CQI, PMI, and RI in a CSI report.
[0205] In some implementations, if the total payload size for the CSI part 1 exceeds the maximum payload size for CSI part 1, the UE may omit the beam prediction report or another CSI report on CSI part 1 with lower priority and transmit the remaining portion on the CSI port 1. The UE may determine the priority for the CSI omission in CSI part 1 of the beam prediction report and another CSI report based on the embodiment in the last section above.
[0206] In some implementations, the UE may report the beam prediction report by a single PUCCH resource. In some other implementations, the UE may report the beam prediction by multiple PUCCH resources, where the UE may report the same or different beam prediction information by different PUCCH resources. In one example, the UE may report the beam prediction information corresponding to different predicted slots by different PUCCH resources.
[0207] In an embodiment, the UE transmits a first portion of a beam prediction report in CSI part 1 on PUCCH or PUSCH, and a second portion of a beam prediction report in CSI part 2 on PUCCH or PUSCH, if / when the UE is configured to transmit the beam prediction report on long PUCCH (e.g., PUCCH with 4 or more symbols) or PUSCH. For example, the second portion of the beam prediction report may be transmitted along with LI, CSI-RS resource indicator, and / or interference and traffic load information.
[0208] In some implementations, the UE may transmit at least one of the followings in the first portion (reported in CSI part 1) :
[0209] ● a number of predicted beams
[0210] ● one or more predicted slot (s)
[0211] ● BI for each predicted beam
[0212] ● whether P-RSRP is reported for each or all predicted beams
[0213] ● whether BPI is reported for each or all predicted beams
[0214] ● whether CI is reported for each or all predicted beams
[0215] In some other implementations, the UE may transmit at least one of the followings in the second portion (reported in CSI part 2) :
[0216] ● BI for each predicted beam;
[0217] ● P-RSRP for a subset or all the predicted beams;
[0218] ● BPI for a subset or all the predicted beams;
[0219] ● CI for a subset or all the predicted beams.
[0220] The UE may report the information above for one or multiple predicted slots. Although the examples above use CSI part 1 and CSI part 2 (e.g., provided in 3GPP TS 38.214 and other relevant technical specifications) as examples for transmitting the beam prediction report information, other similar PUCCH or PUSCH uplink transmission mechanisms may be used as, in substitution, replacement, or supplementation, the CSI part 1 and the CSI part 2 as described.
[0221] In some implementations, if the total payload size for the CSI part 2 exceeds the maximum payload size for CSI part 2, the UE may omit a subset of or all the components in the second portion of the beam prediction report with lower priority and transmit the remaining components on the CSI part 2. The UE may divide the components for the second portion into several priority groups and omit the components in priority group with lower priority.
[0222] In one example, the UE may determine the first priority group includes at least one of BI for a first subset of or all predicted beams for a first subset of or all predicted slots. The UE may determine the second priority group includes at least one of the followings: the BI for a second subset of or all predicted beams for a second subset of predicted slots; the P-RSRP for a subset or all the predicted beams for a first subset of predicted slots; the BPI for a subset or all the predicted beams for a first subset of predicted slots; or the CI for a subset or all the predicted beams for a first subset of predicted slots.
[0223] The UE may determine the third priority group includes at least one of the followings: the P-RSRP for a subset or all the predicted beams for a second subset of predicted slots; the BPI for a subset or all the predicted beams for a second subset of predicted slots; or the CI for a subset or all the predicted beams for a second subset of predicted slots.
[0224] The UE may determine the CSI omission priority for the priority groups according to the following order: the first priority group having the highest priority, the second priority group next, and followed by the third priority group.
[0225] Fig. 10 illustrates a flowchart of a method 1000 of wireless communication at a UE. With reference to Fig. 1, 3-5, and 10, the method may be performed by the UE 102, the UE apparatus 1202, etc., which may include the memory 1226', 1206', 1216, and which may correspond to the entire UE 102 or the entire UE apparatus 1202, or a component (e.g., the beam prediction report component 140) of the UE 102 or the UE apparatus 1202, such as the wireless baseband processor 1226 and / or the application processor 1206.
[0226] As shown in Fig. 10, the UE optionally transmits 1002, to a network entity, a message indicating capabilities of the UE (similar to operations 302 and 402 of Figs. 3 and 4) . The capabilities include at least one of: beam prediction in spatial-domain; beam prediction in time-domain and a supported window length for the beam prediction in the time-domain; joint beam prediction in both the spatial-domain and the time-domain; reporting at least one of: a predicted reference signal received power (P-RSRP) , a beam probability indicator (BPI) , a confidence indicator (CI) , a supported maximum number of predicted beams for the spatial-domain, or a supported maximum number of predicted beams for the time-domain; a maximum number of SSBs or the CSI-RS resource sets per beam prediction report; or a maximum number of beam report configurations.
[0227] The UE receives 1004, from the network entity, a report configuration to configure a beam prediction report including a beam indicator (BI) , the report configuration configuring at least one of a synchronization signal block (SSB) resource set or a channel state information-reference signal (CSI-RS) resource set for channel measurement (similar to operations 304 and 404 of Figs. 3 and 4) .
[0228] The UE receives 1006, from the network entity and based on the report configuration, one or more transmission occasions of the at least one of the SSB resource set or the CSI-RS resource set (similar to operations 306 and 406 of Figs. 3 and 4) .
[0229] The UE selectively transmits 1010, the beam prediction report including the BI predicted based on the one or more transmission occasions and a validation procedure associated with the beam prediction report (similar to operations 310 and 410 of Figs. 3 and 4) .
[0230] In aspects, the UE transmits, to the network entity, a message indicating at least one of the following capabilities of the UE: beam prediction in spatial-domain; beam prediction in time-domain and a supported window length for the beam prediction in the time-domain; joint beam prediction in both the spatial-domain and the time-domain; reporting at least one of: a predicted reference signal received power (P-RSRP) , a beam probability indicator (BPI) , a confidence indicator (CI) , a supported maximum number of predicted beams for the spatial-domain, or a supported maximum number of predicted beams for the time-domain; a maximum number of SSBs or the CSI-RS resource sets per beam prediction report; or a maximum number of beam report configurations.
[0231] In aspects, the report configuration configures SSB resources or CSI-RS resources based on at least one of: a same time-domain behavior; a same serving cell index; a same periodicity; a burst periodicity; or a same periodicity in a burst transmission.
[0232] In aspects, the report configuration configures a subset of the SSB resources or CSI-RS resources having at least one of the following quasi-co-location (QCL) parameters in common: an average delay; a delay spread; a Doppler spread; a Doppler shift; spatial reception parameter; an average gain; an antenna port; or a beam identifier.
[0233] In aspects, the report configuration further configures a time restriction for channel measurement, wherein the one or more transmission occasions are determined based on the time restriction.
[0234] In aspects, the validation procedure is based on at least one of: a number of actually received transmission occasions of the SSB resource set or CSI-RS resource set; a discontinuous reception (DRX) configuration; a predicted slot for beam prediction; a slot for transmitting the beam prediction report; a minimum processing delay for the beam prediction report; a number of occupied CSI processing units (CPUs) ; a number of occupied extended CPUs (eCPUs) ; a maximum number of CPUs; or a maximum number of eCPUs.
[0235] In aspects, the UE determines a priority of the beam prediction report and respective priorities of other types of reports to be transmitted to the network entity; and transmits the beam prediction report based on a priority rule between the beam prediction report and the other types of reports.
[0236] In some cases, the UE multiplexes the beam prediction report and one or more of the other types of reports based on the priority of the beam prediction report and respective priorities of the other types of reports.
[0237] In aspects, the UE detects a collision in time-domain between the beam prediction report on physical uplink control channel (PUCCH) or on physical uplink shared channel (PUSCH) transmission and a sounding reference signal (SRS) ; and responsive to the detecting the collision, drops the beam prediction report or the SRS based on a priority rule.
[0238] In aspects, the UE receives, from the network entity, a reference transmission power; and calculates a predicted reference signal received power (P-RSRP) of a predicted beam based on the reference transmission power.
[0239] In aspects, the beam prediction report further includes at least one of: a number of predicted beams; one or more predicted slots; BI for each of the predicted beams; one or more P-RSRPs for a subset or all of the predicted beams; one or more beam probability indicators (BPIs) for a subset or all of the predicted beams; or one or more confidence indicators (CIs) for a subset or all the predicted beams.
[0240] In aspects, selectively transmitting the beam prediction report includes at least one of: using CSI part 1 on PUCCH or PUSCH to carry the beam prediction report; using one or more PUCCH resources to carry the beam prediction report; or using CSI part 1 on PUCCH or PUSCH to carry a first portion of the beam prediction report and using CSI part 2 on PUCCH or PUSCH to carry a second portion of the beam prediction report.
[0241] Fig. 11 is a flowchart of a method 1100 of wireless communication at a network entity. The method 1100 is complementary to the method 1000 of Fig. 10. With reference to Figs. 1, 3, 5, and 13, the method 1100 may be performed by one or more network entities 104, which may correspond to a base station or a unit of the base station, such as the RU 106, the DU 108, the CU 110, an RU processor 1306, a DU processor 1326, a CU processor 1346, etc. The one or more network entities 104 may include memory 1306’ / 1326’ / 1346’ , which may correspond to an 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 1306, the DU processor 1326, or the CU processor 1346.
[0242] As shown in Fig. 11, the network entity receives 1102, from a UE, a message indicating capabilities of the UE (similar to operations 302 and 502 of Figs. 3 and 5) .
[0243] The network entity transmits 1104, to the UE, a report configuration to configure a beam prediction report including a BI, the report configuration configuring at least one of a SSB resource set or a CSI-RS resource set for channel measurement (similar to operations 304 and 504 of Figs. 3 and 5) .
[0244] The network entity transmits 1106, to the UE, one or more transmission occasions of the at least one of the SSB resource set or the CSI-RS resource set (similar to operations 306 and 506 of Figs. 3 and 5) .
[0245] The network entity receives 1110, from the UE, the beam prediction report including the BI predicted based on the one or more transmission occasions and a validation procedure associated with the beam prediction report (similar to operations 310 and 510 of Figs. 3 and 5) .
[0246] In aspects, the report configuration further configures a time restriction for channel measurement, wherein the one or more transmission occasions are determined based on the time restriction.
[0247] In aspects, the beam prediction report comprises at least one of the following information: a number of predicted beams; one or more predicted slots; BI for each of the predicted beams; one or more P-RSRPs for a subset or all of the predicted beams; one or more beam probability indicators (BPIs) for a subset or all of the predicted beams; or one or more confidence indicators (CIs) for a subset or all the predicted beams.
[0248] A UE apparatus 1202, as described in Fig. 12, may perform the method 1000. The one or more network entities (or BS) 104, as described in Fig. 13, may perform the method 1100.
[0249] Fig. 12 is a diagram 1200 illustrating an example of a hardware implementation for a UE apparatus 1202. The UE apparatus 1202 may be the UE 102, a component of the UE 102, or may implement UE functionality. The UE apparatus 1202 may include an application processor 1206, which may have on-chip memory 1206’ . In examples, the application processor 1206 may be coupled to a secure digital (SD) card 1208 and / or a display 1210. The application processor 1206 may also be coupled to a sensor (s) module 1212, a power supply 1214, an additional module of memory 1216, a camera 1218, and / or other related components. For example, the sensor (s) module 1212 may control a barometric pressure sensor / altimeter, a motion sensor such as an inertial management unit (IMU) , a gyroscope, accelerometer (s) , a light detection and ranging (LIDAR) device, a radio-assisted detection and ranging (RADAR) device, a sound navigation and ranging (SONAR) device, a magnetometer, an audio device, and / or other technologies used for positioning.
[0250] The UE apparatus 1202 may further include a wireless baseband processor 1226, which may be referred to as a modem. The wireless baseband processor 1226 may have on-chip memory 1226'. Along with, and similar to, the application processor 1206, the wireless baseband processor 1226 may also be coupled to the sensor (s) module 1212, the power supply 1214, the additional module of memory 1216, the camera 1218, and / or other related components. The wireless baseband processor 1226 may be additionally coupled to one or more subscriber identity module (SIM) card (s) 1220 and / or one or more transceivers 1230 (e.g., wireless RF transceivers) .
[0251] Within the one or more transceivers 1230, the UE apparatus 1202 may include a Bluetooth module 1232, a WLAN module 1234, an SPS module 1236 (e.g., GNSS module) , and / or a cellular module 1238. The Bluetooth module 1232, the WLAN module 1234, the SPS module 1236, and the cellular module 1238 may each include an on-chip transceiver (TRX) , or in some cases, just a transmitter (TX) or just a receiver (RX) . The Bluetooth module 1232, the WLAN module 1234, the SPS module 1236, and the cellular module 1238 may each include dedicated antennas and / or utilize antennas 1240 for communication with one or more other nodes. For example, the UE apparatus 1202 may communicate through the transceiver (s) 1230 via the antennas 1240 with another UE 102 (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.
[0252] The wireless baseband processor 1226 and the application processor 1206 may each include a computer-readable medium / memory 1226', 1206', respectively. The additional module of memory 1216 may also be considered a computer-readable medium / memory. Each computer-readable medium / memory 1226', 1206', 1216 may be non-transitory. The wireless baseband processor 1226 and the application processor 1206 may each be responsible for general processing, including execution of software stored on the computer-readable medium / memory 1226', 1206', 1216. The software, when executed by the wireless baseband processor 1226 / application processor 1206, causes the wireless baseband processor 1226 / application processor 1206 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 1226 / application processor 1206 when executing the software. The wireless baseband processor 1226 / application processor 1206 may be a component of the UE 102. The UE apparatus 1202 may be a processor chip (e.g., modem and / or application) and include just the wireless baseband processor 1226 and / or the application processor 1206. In other examples, the UE apparatus 1202 may be the entire UE 102 and include the additional modules of the apparatus 1202.
[0253] As discussed in Fig. 1 and implemented with respect to Figs. 3 and 4, the beam prediction report component 130 is configured to receive, from a network entity, a first control signaling indicating: at least one beam-prediction TCI state associated with a first delay, and at least one non-beam-prediction TCI state associated with a second delay. The beam prediction report component 130 then receives a second control signaling activating one or more TCI states among the at least one beam-prediction TCI state and the at least one non-beam-prediction TCI state. The UE 102 then communicates with the network entity based on the one or more TCI states at an action time associated with the first delay or the second delay.
[0254] The beam prediction report component 130 may be within the application processor 1206 (e.g., at 130a) , the wireless baseband processor 1226 (e.g., at 130b) , or both the application processor 1206 and the wireless baseband processor 1226. The beam prediction report component 130a-130b 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.
[0255] Fig. 13 is a diagram 1300 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 1346, which may have on-chip memory 1346'. In some aspects, the CU 110 may further include an additional module of memory 1356 and / or a communications interface 1348, both of which may be coupled to the CU processor 1346. The CU 110 may communicate with the DU 108 through a midhaul link 162, such as an F1 interface between the communications interface 1348 of the CU 110 and a communications interface 1328 of the DU 108.
[0256] The DU 108 may include a DU processor 1326, which may have on-chip memory 1326'. In some aspects, the DU 108 may further include an additional module of memory 1336 and / or the communications interface 1328, both of which may be coupled to the DU processor 1326. The DU 108 may communicate with the RU 106 through a fronthaul link 160 between the communications interface 1328 of the DU 108 and a communications interface 1308 of the RU 106.
[0257] The RU 106 may include an RU processor 1306, which may have on-chip memory 1306'. In some aspects, the RU 106 may further include an additional module of memory 1316, the communications interface 1308, and one or more transceivers 1330, all of which may be coupled to the RU processor 1306. The RU 106 may further include antennas 1340, which may be coupled to the one or more transceivers 1330, such that the RU 106 may communicate through the one or more transceivers 1330 via the antennas 1340 with the UE 102.
[0258] The on-chip memory 1306', 1326', 1346'a nd the additional modules of memory 1316, 1336, 1356 may each be considered a computer-readable medium / memory. Each computer-readable medium / memory may be non-transitory. Each of the processors 1306, 1326, 1346 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) 1306, 1326, 1346 causes the processor (s) 1306, 1326, 1346 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) 1306, 1326, 1346 when executing the software. In examples, the beam 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.
[0259] The beam configuration component 150 may perform various operations and signaling (such as the operations in Figs. 3, 4, and 5) according to the examples provided herein and be within one or more processors of the one or more network entities 104, such as the RU processor 1306 (e.g., at 150a) , the DU processor 1326 (e.g., at 150b) , and / or the CU processor 1346 (e.g., at 150c) . The beam 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 1306, 1326, 1346 configured to perform the stated processes / algorithm, stored within a computer-readable medium for implementation by the one or more processors 1306, 1326, 1346, or a combination thereof.
[0260] The specific order or hierarchy of blocks in the processes and flowcharts disclosed herein are 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 example / 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.
[0261] 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.
[0262] 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.
[0263] 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, ML / AI processing units, central processing units, 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 may 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.
[0264] 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 may 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 may be used to store computer executable code in the form of instructions or data structures that may be accessed by a computer. Storage media may be any available media that may be accessed by a computer.
[0265] 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.
[0266] 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.
[0267] 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.
[0268] 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 “may, ” 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 “may” 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.
[0269] 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 may be interpreted as a set of elements where the elements number one or more.
[0270] 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) . Sometimes an “X” is used to universally denote multiple variations of a feature. For instance, “X06” may universally refer to all reference numbers that end in “06” (e.g., 206, 306, 406, etc. ) .
[0271] It is noted that throughout this disclosure, an expression of “X / Y” may include meaning of “X or Y” . It is noted that throughout this disclosure, an expression of “X / Y” may include meaning of “X and Y” . It is noted that throughout this disclosure, an expression of “X / Y” may include meaning of “X and / or Y” . It is noted that throughout this disclosure, an expression of “ (A) B” or “B (A) ” may include concept of “only B” . It is noted that throughout this disclosure, an expression of “ (A) B” or “B (A) ” may include concept of “A+B” or “B+A” .
[0272] It is noted that some or all of the foregoing or the following embodiments may be jointly combined or formed to be a new or another one embodiment.
[0273] It is noted that the foregoing or the following embodiments may be used to solve at least (but not limited to) the issue (s) or scenario (s) mentioned in this disclosure.
[0274] The following additional considerations may apply to the foregoing and the following discussions.
[0275] It is noted that any two or more than two of the foregoing or the following paragraphs, (sub) -bullets, points, actions, or claims described in each method / embodiment / implementation may be combined logically, reasonably, and properly to form a specific method.
[0276] It is noted that any sentence, paragraph, (sub) -bullet, point, action, or claim described in each of the foregoing or the following embodiment (s) / implementations / concept (s) may be implemented independently and separately to form a specific method. Dependency, e.g., “based on, ” “more specifically, ” “where” or etc., in embodiment (s) / implementations / concept (s) mentioned in this disclosure is just one possible embodiment which would not restrict the specific method.
[0277] It is noted that, some or all of the following terminology and assumption may be used hereafter. A BS may include a network central unit or a network node in NR which is used to control one or multiple TRPs which are associated with one or multiple cells. Communication between BS and TRP (s) is via fronthaul. BS may be referred to as central unit (CU) , eNB, gNB, or NodeB. A TRP may include a transmission and reception point provides network coverage and directly communicates with UEs. TRP may be referred to as distributed unit (DU) or network node. A cell may include one or multiple associated TRPs, e.g., coverage of the cell is composed of coverage of all associated TRP (s) . One cell is controlled by one BS or a network entity. Cell may be referred to as TRP group (TRPG) . A serving beam may include a beam generated by a network node, e.g., TRP, which is configured to be used to communicate with the UE, such as, for transmission and / or reception. A candidate beam for a UE is a candidate of a serving beam. Serving beam may or may not be candidate beam.
[0278] A user device in which the techniques of this disclosure may be implemented (e.g., the UE 102) may be any suitable device capable of wireless communications such as a smartphone, a tablet computer, a laptop computer, a mobile gaming console, a point-of-sale (POS) terminal, a health monitoring device, a drone, a camera, a media-streaming dongle or another personal media device, a wearable device such as a smartwatch, a wireless hotspot, a femtocell, or a broadband router. Further, the user device in some cases may be embedded in an electronic system such as the head unit of a vehicle or an advanced driver assistance system (ADAS) . Still further, the user device may operate as an internet-of-things (IoT) device or a mobile-internet device (MID) . Depending on the type, the user device may include one or more general-purpose processors, a computer-readable memory, a user interface, one or more network interfaces, one or more sensors, etc.
[0279] Certain embodiments are described in this disclosure as including logic or a number of components or modules. Modules may be software modules (e.g., code stored on non-transitory machine-readable medium) or hardware modules. A hardware module is a tangible unit capable of performing certain operations and may be configured or arranged in a certain manner. A hardware module may comprise dedicated circuitry or logic that is permanently configured (e.g., as a special-purpose processor, such as a field programmable gate array (FPGA) or an application-specific integrated circuit (ASIC) ) to perform certain operations. A hardware module may also comprise programmable logic or circuitry (e.g., as encompassed within a general-purpose processor or other programmable processor) that is temporarily configured by software to perform certain operations. The decision to implement a hardware module in dedicated and permanently configured circuitry, or in temporarily configured circuitry (e.g., configured by software) may be driven by cost and time considerations.
[0280] When implemented in software, the techniques may be provided as part of the operating system, a library used by multiple applications, a particular software application, etc. The software may be executed by one or more general-purpose processors or one or more special-purpose processors.
[0281] 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” may 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, may be construed as “based at least on A” unless specifically recited differently.
[0282] Example Aspects
[0283] Example 1 is an apparatus, comprising a processer configured to cause a user equipment (UE) to:
[0284] receive one Channel State Information (CSI) report configuration configuring the UE to report at least the predicted beam indicator (BI) and one synchronization signal block (SSB) and / or CSI reference signal (CSI-RS) resources set for channel measurement;
[0285] receive the SSB / CSI-RS resource set for channel measurement;
[0286] transmit the beam prediction report including BI based on received one or multiple transmission occasions of the SSB / CSI-RS resources for channel measurement.
[0287] Example 2 is an apparatus according to example 1, wherein the UE reports the UE capability indicating at least one of:
[0288] whether it supports beam prediction report based on spatial-domain beam prediction;
[0289] whether it supports beam prediction report based on time-domain beam prediction;
[0290] whether it supports beam prediction report based on joint spatial-domain and time-domain beam prediction;
[0291] whether it supports P-RSRP / BPI / CI report; the supported maximum number of predicted beams for spatial-domain and / or time-domain beam prediction;
[0292] the supported predicted window length for time-domain beam prediction;
[0293] the supported maximum number of configured SSB or CSI-RS resources per CSI report for beam prediction; or
[0294] the supported maximum number of CSI report configurations for beam prediction.
[0295] Example 3 is an apparatus according to example 1, wherein the UE receives the configuration of the SSB or CSI-RS resource (s) for channel measurement based on at least one of:
[0296] the same time-domain behavior;
[0297] the same serving cell index;
[0298] the same periodicity;
[0299] a burst periodicity; or
[0300] the same periodicity in a burst.
[0301] Example 4 is an apparatus according to example 1, wherein the UE receives the configuration for a subset of the SSB or CSI-RS resource (s) for channel measurement indicating the SSB or CSI-RS resource (s) share at least one of the following quasi-co-location parameters:
[0302] average delay;
[0303] delay spread;
[0304] Doppler spread;
[0305] Doppler shift;
[0306] spatial reception parameters;
[0307] average gain;
[0308] the same antenna port; or
[0309] the same beam identifier.
[0310] Example 5 is an apparatus according to examples 1-4, wherein the UE receives the configuration of time restriction for channel measurement.
[0311] Example 6 is an apparatus according to example 5, wherein the UE determines one or multiple transmission occasions for the SSB / CSI-RS resources for channel measurement based on the received configuration of time restriction for channel measurement.
[0312] Example 7 is an apparatus according to example 1, wherein the UE determines whether to transmit the beam prediction report based on at least one of:
[0313] the number of received transmission occasions of the SSB / CSI-RS resources for channel measurement;
[0314] discontinuous reception (DRX) configuration;
[0315] the predicted slot for beam prediction;
[0316] the slot for the beam prediction report;
[0317] minimum processing delay for beam prediction report;
[0318] a number of occupied CSI processing units (CPUs) ;
[0319] a number of occupied extended CPUs;
[0320] the maximum number of CPUs; or
[0321] the maximum number of eCPUs.
[0322] Example 8 is an apparatus according to example 1, wherein the UE determines whether to transmit the beam prediction report or other types of report based on a priority.
[0323] Example 9 is an apparatus according to example 1, wherein the UE multiplexes the beam prediction report and other types of report based on a priority.
[0324] Example 10 is an apparatus according to example 1, wherein the UE determines the priority based on at least one of:
[0325] the time-domain behavior for the report;
[0326] serving cell index for the SSB / CSI-RS for channel measurement or the serving cell with the report configuration configured;
[0327] report content; or
[0328] report configuration identifier (ID) .
[0329] Example 11 is an apparatus according to example 1, wherein if the PUCCH with the beam prediction report collides with a sounding reference signal (SRS) in time domain in the same serving cell, the UE drops the PUCCH or SRS based on a priority.
[0330] Example 12 is an apparatus according to example 11, wherein the UE determines the priority based on the time-domain behavior of the SRS.
[0331] Example 13 is an apparatus according to example 1, wherein if the PUCCH or PUSCH with the beam prediction report collides with a guard period of a sounding reference signal (SRS) in time domain in the same serving cell, the UE drops the PUCCH or PUSCH.
[0332] Example 14 is an apparatus according to example 1, wherein the UE calculates the predicted reference signal received power (P-RSRP) for a predicted beam based on a reference transmission power.
[0333] Example 15 is an apparatus according to example 14, wherein the UE receives the configuration of the reference transmission power.
[0334] Example 16 is an apparatus according to example 1, wherein the UE determines the predicted slot (s) for beam prediction report based on at least one of:
[0335] a transmission occasion of the SSB / CSI-RS resource;
[0336] CSI reference resource; or
[0337] slot for the beam prediction report.
[0338] Example 17 is an apparatus according to examples 1-16, wherein the UE transmits at least one of the following in a beam prediction report:
[0339] a number of predicted beams;
[0340] predicted slot (s) ;
[0341] BI for each predicted beam;
[0342] whether P-RSRP is reported for each or all predicted beams;
[0343] whether beam probability indicator (BPI) is reported for each or all predicted beams;
[0344] whether confidence indicator (CI) is reported for each or all predicted beams;
[0345] P-RSRP for a subset or all the predicted beams;
[0346] BPI for a subset or all the predicted beams; or
[0347] CI for a subset or all the predicted beams.
[0348] Example 18 is an apparatus according to example 17, wherein the UE transmits the beam prediction report by CSI part 1 on PUCCH or PUSCH.
[0349] Example 19 is an apparatus according to example 18, wherein the UE transmits the beam prediction report by one or multiple PUCCH resources.
[0350] Example 20 is an apparatus according to example 17, wherein the UE transmits a first portion of the beam prediction report by CSI part 1 on PUCCH or PUSCH and the remaining portion of the beam prediction report by CSI part 2 on PUCCH or PUSCH.
[0351] Example 21 is an apparatus, comprising a processer configured to cause a base station (BS) to:
[0352] transmit one Channel State Information (CSI) report configuration configuring the UE to report at least the predicted beam indicator (BI) and one synchronization signal block (SSB) and / or CSI reference signal (CSI-RS) resources set for channel measurement;
[0353] transmit the SSB / CSI-RS resource set for channel measurement; and
[0354] receive the beam prediction report including BI.
[0355] Example 22 is an apparatus according to example 21, wherein the BS receives the UE capability indicating at least one of:
[0356] whether it supports beam prediction report based on spatial-domain beam prediction;
[0357] whether it supports beam prediction report based on time-domain beam prediction;
[0358] whether it supports beam prediction report based on joint spatial-domain and time-domain beam prediction;
[0359] whether it supports P-RSRP / BPI / CI report; the supported maximum number of predicted beams for spatial-domain and / or time-domain beam prediction;
[0360] the supported predicted window length for time-domain beam prediction;
[0361] the supported maximum number of configured SSB or CSI-RS resources per CSI report for beam prediction; or
[0362] the supported maximum number of CSI report configurations for beam prediction.
[0363] Example 23 is an apparatus according to example 21, wherein the BS transmits the configuration of the SSB or CSI-RS resource (s) for channel measurement based on at least one of:
[0364] the same time-domain behavior;
[0365] the same serving cell index;
[0366] the same periodicity;
[0367] a burst periodicity; or
[0368] the same periodicity in a burst.
[0369] Example 24 is an apparatus according to example 21, wherein the BS transmits the configuration for a subset of the SSB or CSI-RS resource (s) for channel measurement indicating the SSB or CSI-RS resource (s) share at least one of the following quasi-co-location parameters:
[0370] average delay;
[0371] delay spread;
[0372] Doppler spread;
[0373] Doppler shift;
[0374] spatial reception parameters;
[0375] average gain;
[0376] the same antenna port; or
[0377] the same beam identifier.
[0378] Example 25 is an apparatus according to examples 21-24, wherein the BS transmits the configuration of time restriction for channel measurement.
[0379] Example 26 is an apparatus according to example 21, wherein the BS determines whether to receive the beam prediction report based on at least one of:
[0380] the number of received transmission occasions of the SSB / CSI-RS resources for channel measurement;
[0381] discontinuous reception (DRX) configuration;
[0382] the predicted slot for beam prediction;
[0383] the slot for the beam prediction report;
[0384] minimum processing delay for beam prediction report;
[0385] number of occupied CSI processing units (CPUs) ;
[0386] number of occupied extended CPUs;
[0387] maximum number of CPUs; or
[0388] maximum number of eCPUs.
[0389] Example 27 is an apparatus according to example 21, wherein the BS determines whether to receive the beam prediction report or other types of report based on a priority.
[0390] Example 28 is an apparatus according to example 21, wherein the BS receives the multiplexed beam prediction report and other types of report based on a priority.
[0391] Example 29 is an apparatus according to examples 27-28, wherein the BS determines the priority based on at least one of:
[0392] the time-domain behavior for the report;
[0393] serving cell index for the SSB / CSI-RS for channel measurement or the serving cell with the report configuration configured;
[0394] report content; or
[0395] report configuration identifier (ID) .
[0396] Example 30 is an apparatus according to example 21, wherein if the PUCCH with the beam prediction report collides with a sounding reference signal (SRS) in time domain in the same serving cell, the BS refrains from receiving the PUCCH or SRS based on a priority.
[0397] Example 31 is an apparatus according to example 30, wherein the BS determines the priority based on the time-domain behavior of the SRS.
[0398] Example 32 is an apparatus according to example 21, wherein if the PUCCH or PUSCH with the beam prediction report collides with a guard period of a sounding reference signal (SRS) in time domain in the same serving cell, the BS refrains from receiving the PUCCH or PUSCH.
[0399] Example 33 is an apparatus according to example 21, wherein the BS transmits the configuration of the reference transmission power.
[0400] Example 34 is an apparatus according to example 21, wherein the BS determines the predicted slot (s) for beam prediction report based on at least one of:
[0401] a transmission occasion of the SSB / CSI-RS resource;
[0402] CSI reference resource; or
[0403] slot for the beam prediction report.
[0404] Example 35 is an apparatus according to examples 21-34, wherein the BS receives at least one of the following in a beam prediction report:
[0405] number of predicted beams;
[0406] predicted slot (s) ;
[0407] BI for each predicted beam;
[0408] whether P-RSRP is reported for each or all predicted beams;
[0409] whether beam probability indicator (BPI) is reported for each or all predicted beams;
[0410] whether confidence indicator (CI) is reported for each or all predicted beams;
[0411] P-RSRP for a subset or all the predicted beams;
[0412] BPI for a subset or all the predicted beams; or
[0413] CI for a subset or all the predicted beams.
[0414] Example 36 is an apparatus according to example 35, wherein the BS receives the beam prediction report by CSI part 1 on PUCCH or PUSCH.
[0415] Example 37 is an apparatus according to example 36, wherein the BS receives the beam prediction report by one or multiple PUCCH resources.
[0416] Example 38 is an apparatus according to example 35, wherein the BS receives a first portion of the beam prediction report by CSI part 1 on PUCCH or PUSCH and the remaining portion of the beam prediction report by CSI part 2 on PUCCH or PUSCH.
[0417] Example 39 is a method for wireless communications by a user equipment (UE) , the method comprising:
[0418] receiving, from a network entity, a report configuration to configure a beam prediction report including a beam indicator (BI) , the report configuration configuring at least one of a synchronization signal block (SSB) resource set or a channel state information-reference signal (CSI-RS) resource set for channel measurement;
[0419] receiving, from the network entity and based on the report configuration, one or more transmission occasions of the at least one of the SSB resource set or the CSI-RS resource set; and
[0420] selectively transmitting the beam prediction report including the BI predicted based on the one or more transmission occasions and a validation procedure associated with the beam prediction report.
[0421] Example 40 is a method of example 39, further comprising:
[0422] transmitting, to the network entity, a message indicating at least one of the following capabilities of the UE:
[0423] beam prediction in spatial-domain;
[0424] beam prediction in time-domain and a supported window length for the beam prediction in the time-domain;
[0425] joint beam prediction in both the spatial-domain and the time-domain;
[0426] reporting at least one of: a predicted reference signal received power (P-RSRP) , a beam probability indicator (BPI) , a confidence indicator (CI) , a supported maximum number of predicted beams for the spatial-domain, or a supported maximum number of predicted beams for the time-domain;
[0427] a maximum number of SSBs or the CSI-RS resource sets per beam prediction report; or
[0428] a maximum number of beam report configurations.
[0429] Example 41 is a method of example 39 or 40, wherein the report configuration configures SSB resources or CSI-RS resources based on at least one of:
[0430] a same time-domain behavior;
[0431] a same serving cell index;
[0432] a same periodicity;
[0433] a burst periodicity; or
[0434] a same periodicity in a burst transmission.
[0435] Example 42 is a method of example 39 or 40, wherein the report configuration configures a subset of the SSB resources or CSI-RS resources having at least one of the following quasi-co-location (QCL) parameters in common:
[0436] an average delay;
[0437] a delay spread;
[0438] a Doppler spread;
[0439] a Doppler shift;
[0440] spatial reception parameter;
[0441] an average gain;
[0442] an antenna port; or
[0443] a beam identifier.
[0444] Example 43 is a method of any one of examples 39 to 42, wherein the report configuration further configures a time restriction for channel measurement, wherein the one or more transmission occasions are determined based on the time restriction.
[0445] Example 44 is a method of any one of examples 39 to 43, wherein the validation procedure is based on at least one of:
[0446] a number of actually received transmission occasions of the SSB resource set or CSI-RS resource set;
[0447] a discontinuous reception (DRX) configuration;
[0448] a predicted slot for beam prediction;
[0449] a slot for transmitting the beam prediction report;
[0450] a minimum processing delay for the beam prediction report;
[0451] a number of occupied CSI processing units (CPUs) ;
[0452] a number of occupied extended CPUs (eCPUs) ;
[0453] a maximum number of CPUs; or
[0454] a maximum number of eCPUs.
[0455] Example 45 is a method of any one of examples 39 to 44, further comprising:
[0456] determining a priority of the beam prediction report and respective priorities of other types of reports to be transmitted to the network entity; and
[0457] transmitting the beam prediction report based on a priority rule between the beam prediction report and the other types of reports.
[0458] Example 46 is a method of example 45, further comprising:
[0459] multiplexing the beam prediction report and one or more of the other types of reports based on the priority of the beam prediction report and respective priorities of the other types of reports.
[0460] Example 47 is a method of example 45 or 46, wherein determining a priority of the beam prediction report and respective priorities of other types of reports to be transmitted to the network entity is based on at least one of the following:
[0461] time-domain behaviors of the beam prediction report and the other types of reports;
[0462] serving cell indices of the at least one of the SSB or the CSI-RS resource set or serving cells configured with the report configuration;
[0463] respective content of the beam prediction report and the other types of reports; or identifiers (IDs) of configurations of the beam prediction report and the other types of reports.
[0464] Example 48 is a method of any one of examples 39 to 47, further comprising:
[0465] detecting a collision in time-domain between the beam prediction report on physical uplink control channel (PUCCH) or on physical uplink shared channel (PUSCH) transmission and a sounding reference signal (SRS) ; and
[0466] responsive to the detecting the collision, dropping the beam prediction report or the SRS based on a priority rule.
[0467] Example 49 is a method of example 48, wherein the collision in time-domain comprises a collision between the beam prediction report and the SRS in a guard period of the SRS, and the method further comprises dropping the PUCCH or PUSCH of the beam prediction report.
[0468] Example 50 is a method of any one of examples 39 to 49, further comprising:
[0469] receiving, from the network entity, a reference transmission power; and
[0470] calculating a predicted reference signal received power (P-RSRP) of a predicted beam based on the reference transmission power.
[0471] Example 51 is a method of any one of examples 39 to 50, wherein the beam prediction report further comprises at least one of:
[0472] a number of predicted beams;
[0473] one or more predicted slots;
[0474] BI for each of the predicted beams;
[0475] one or more P-RSRPs for a subset or all of the predicted beams;
[0476] one or more beam probability indicators (BPIs) for a subset or all of the predicted beams; or
[0477] one or more confidence indicators (CIs) for a subset or all the predicted beams.
[0478] Example 52 is a method of any one of examples 39 to 51, wherein selectively transmitting the beam prediction report comprises at least one of:
[0479] using CSI part 1 on PUCCH or PUSCH to carry the beam prediction report;
[0480] using one or more PUCCH resources to carry the beam prediction report; or using CSI part 1 on PUCCH or PUSCH to carry a first portion of the beam prediction report and using CSI part 2 on PUCCH or PUSCH to carry a second portion of the beam prediction report.
[0481] Example 53 is a method for wireless communications by a network entity, the method comprising:
[0482] transmitting (304) , to a user equipment (UE) , a report configuration to configure a beam prediction report including a beam indicator (BI) , the report configuration configuring at least one of a synchronization signal block (SSB) resource set or a channel state information-reference signal (CSI-RS) resource set for channel measurement;
[0483] transmitting (306) , to the UE, one or more transmission occasions of the at least one of the SSB resource set or the CSI-RS resource set; and
[0484] receiving (310) the beam prediction report including the BI predicted based on the one or more transmission occasions and a validation procedure associated with the beam prediction report.
[0485] Example 54 is a method of example 53, further comprising:
[0486] receiving (302) , from the UE, a message indicating at least one of the following capabilities of the UE:
[0487] beam prediction in spatial-domain;
[0488] beam prediction in time-domain and a supported window length for the beam prediction in the time-domain;
[0489] joint beam prediction in both the spatial-domain and the time-domain;
[0490] reporting at least one of: a predicted reference signal received power (P-RSRP) , a beam probability indicator (BPI) , a confidence indicator (CI) , a supported maximum number of predicted beams for the spatial-domain, or a supported maximum number of predicted beams for the time-domain;
[0491] a maximum number of SSBs or the CSI-RS resource sets per beam prediction report; or
[0492] a maximum number of beam report configurations.
[0493] Example 55 is a method of example 53 or 54, wherein the report configuration configures the SSB or CSI-RS resources based on at least one of:
[0494] a same time-domain behavior;
[0495] a same serving cell index;
[0496] a same periodicity;
[0497] a burst periodicity; or
[0498] a same periodicity in a burst operation.
[0499] Example 56 is a method of example 53 or 54, wherein the report configuration configures a subset of the SSB or CSI-RS resources having at least one of the following quasi-co-location (QCL) parameters in common:
[0500] an average delay;
[0501] a delay spread;
[0502] a Doppler spread;
[0503] a Doppler shift;
[0504] spatial reception parameters;
[0505] an average gain;
[0506] a antenna port; or
[0507] a beam identifier.
[0508] Example 57 is a method of any one of examples 53 to 56, wherein the report configuration further configures a time restriction for channel measurement, wherein the one or more transmission occasions are determined based on the time restriction.
[0509] Example 58 is a method of any one of examples 53 to 57, further comprising:
[0510] transmitting, to the UE, a reference transmission power for the UE to calculate a predicted reference signal received power (P-RSRP) of a predicted beam based on the reference transmission power.
[0511] Example 59 is a method of any one of examples 53 to 58, wherein the beam prediction report comprises at least one of the following information:
[0512] a number of predicted beams;
[0513] one or more predicted slots;
[0514] BI for each of the predicted beams;
[0515] one or more P-RSRPs for a subset or all of the predicted beams;
[0516] one or more beam probability indicators (BPIs) for a subset or all of the predicted beams; or
[0517] one or more confidence indicators (CIs) for a subset or all the predicted beams.
[0518] Example 60 is a method of any one of examples 53 to 59, wherein receiving the beam prediction report comprises at least one of:
[0519] receiving the beam prediction report in CSI part 1 on PUCCH or PUSCH;
[0520] receiving the beam prediction report in one or more PUCCH resources; or receiving a first portion of the beam prediction report in CSI part 1 on PUCCH or PUSCH and a second portion of the beam prediction report in CSI part 2 on PUCCH or PUSCH.
Claims
1.A method for wireless communications by a user equipment (UE) , the method comprising:receiving (304) , from a network entity, a report configuration to configure a beam prediction report including a beam indicator (BI) , the report configuration configuring at least one of a synchronization signal block (SSB) resource set or a channel state information-reference signal (CSI-RS) resource set for channel measurement;receiving (306) , from the network entity and based on the report configuration, one or more transmission occasions of the at least one of the SSB resource set or the CSI-RS resource set; andselectively transmitting (310) the beam prediction report including the BI predicted based on the one or more transmission occasions and a validation procedure associated with the beam prediction report.2.The method of claim 1, further comprising:transmitting (302) , to the network entity, a message indicating at least one of the following capabilities of the UE:beam prediction in spatial-domain;beam prediction in time-domain and a supported window length for the beam prediction in the time-domain;joint beam prediction in both the spatial-domain and the time-domain;reporting at least one of: a predicted reference signal received power (P-RSRP) , a beam probability indicator (BPI) , a confidence indicator (CI) , a supported maximum number of predicted beams for the spatial-domain, or a supported maximum number of predicted beams for the time-domain;a maximum number of SSBs or the CSI-RS resource sets per beam prediction report; ora maximum number of beam report configurations.3.The method of claim 1 or 2, wherein the report configuration configures SSB resources or CSI-RS resources based on at least one of:a same time-domain behavior;a same serving cell index;a same periodicity;a burst periodicity; ora same periodicity in a burst transmission.4.The method of claim 1 or 2, wherein the report configuration configures a subset of the SSB resources or CSI-RS resources having at least one of the following quasi-co-location (QCL) parameters in common:an average delay;a delay spread;a Doppler spread;a Doppler shift;spatial reception parameter;an average gain;an antenna port; ora beam identifier.5.The method of any one of claims 1 to 4, wherein the report configuration further configures a time restriction for channel measurement, wherein the one or more transmission occasions are determined based on the time restriction.6.The method of any one of claims 1 to 5, wherein the validation procedure is based on at least one of:a number of actually received transmission occasions of the SSB resource set or CSI-RS resource set;a discontinuous reception (DRX) configuration;a predicted slot for beam prediction;a slot for transmitting the beam prediction report;a minimum processing delay for the beam prediction report;a number of occupied CSI processing units (CPUs) ;a number of occupied extended CPUs (eCPUs) ;a maximum number of CPUs; ora maximum number of eCPUs.7.The method of any one of claims 1 to 6, further comprising:determining a priority of the beam prediction report and respective priorities of other types of reports to be transmitted to the network entity; andtransmitting the beam prediction report based on a priority rule between the beam prediction report and the other types of reports.8.The method of claim 7, further comprising:multiplexing the beam prediction report and one or more of the other types of reports based on the priority of the beam prediction report and respective priorities of the other types of reports.9.The method of any one of claims 1 to 8, further comprising:detecting a collision in time-domain between the beam prediction report on physical uplink control channel (PUCCH) or on physical uplink shared channel (PUSCH) transmission and a sounding reference signal (SRS) ; andresponsive to the detecting the collision, dropping the beam prediction report or the SRS based on a priority rule.10.The method of any one of claims 1 to 9, further comprising:receiving, from the network entity, a reference transmission power; andcalculating a predicted reference signal received power (P-RSRP) of a predicted beam based on the reference transmission power.11.The method of any one of claims 1 to 10, wherein the beam prediction report further comprises at least one of:a number of predicted beams;one or more predicted slots;BI for each of the predicted beams;one or more P-RSRPs for a subset or all of the predicted beams;one or more beam probability indicators (BPIs) for a subset or all of the predicted beams; orone or more confidence indicators (CIs) for a subset or all the predicted beams.12.The method of any one of claims 1 to 11, wherein selectively transmitting the beam prediction report comprises at least one of:using CSI part 1 on PUCCH or PUSCH to carry the beam prediction report;using one or more PUCCH resources to carry the beam prediction report; orusing CSI part 1 on PUCCH or PUSCH to carry a first portion of the beam prediction report and using CSI part 2 on PUCCH or PUSCH to carry a second portion of the beam prediction report.13.A method for wireless communications by a network entity, the method comprising:transmitting (304) , to a user equipment (UE) , a report configuration to configure a beam prediction report including a beam indicator (BI) , the report configuration configuring at least one of a synchronization signal block (SSB) resource set or a channel state information-reference signal (CSI-RS) resource set for channel measurement;transmitting (306) , to the UE, one or more transmission occasions of the at least one of the SSB resource set or the CSI-RS resource set; andreceiving (310) the beam prediction report including the BI predicted based on the one or more transmission occasions and a validation procedure associated with the beam prediction report.14.The method of claim 13, wherein the report configuration further configures a time restriction for channel measurement, wherein the one or more transmission occasions are determined based on the time restriction.15.The method of claim 13 or 14, wherein the beam prediction report comprises at least one of the following information:a number of predicted beams;one or more predicted slots;BI for each of the predicted beams;one or more P-RSRPs for a subset or all of the predicted beams;one or more beam probability indicators (BPIs) for a subset or all of the predicted beams; orone or more confidence indicators (CIs) for a subset or all the predicted beams.16.An apparatus comprising:one or more radio frequency (RF) modems;a processor coupled to the one or more RF modems; andat least one memory storing executable instructions, the executable instructions to manipulate at least one of the processor or the one or more RF modems to perform the method of any of claims 1 to 15.
Citation Information
Patent Citations
Methods on beam prediction for wireless communication
WO2023212272A1