Support of event triggered CSI reporting
The UE's prioritization and management of event-triggered CSI reports address existing challenges in wireless communication systems, optimizing CPU usage and timer handling for efficient LTM beam measurements and data transmission.
Patent Information
- Application Number
- PCT/CN2025/085493
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-02-05
AI Technical Summary
Existing wireless communication systems face challenges in prioritizing and managing channel state information (CSI) reports, particularly in event-triggered scenarios, including priority rules, CPU occupation, CSI-RS resource configuration, and timer management for L1/L2 triggered mobility (LTM), which are not adequately addressed in current specifications.
The proposed solution involves a user equipment (UE) that determines the priority of event-triggered CSI reports based on specific configurations, manages CPU occupation during CSI processing, and handles time-to-trigger (TTT) timers and periodic reporting for LTM CSI reporting, ensuring efficient handling of CSI-RS resources and beam measurements.
This approach enhances the efficiency and effectiveness of CSI reporting by establishing clear priority rules, optimizing CPU usage, and managing timers, thereby improving the reliability and speed of LTM beam measurements and data transmission in wireless networks.
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Figure CN2025085493_05022026_PF_FP_ABST
Abstract
Description
SUPPORT OF EVENT TRIGGERED CSI REPORTINGTECHNICAL FIELD
[0001] The present disclosure relates to wireless communications, and more specifically to a user equipment (UE) , a processor for wireless communication, a method, and a computer readable medium for supporting event triggered channel state information (CSI) reporting.BACKGROUND
[0002] A wireless communications system may include one or multiple network communication devices, such as base stations, which may be otherwise known as an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. Each network communication devices, such as a base station may support wireless communications for one or multiple user communication devices, which may be otherwise known as user equipment (UE) , or other suitable terminology. The wireless communications system may support wireless communications with one or multiple user communication devices by utilizing resources of the wireless communication system (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) . Additionally, the wireless communications system may support wireless communications across various radio access technologies including third generation (3G) radio access technology, fourth generation (4G) radio access technology, fifth generation (5G) radio access technology, among other suitable radio access technologies beyond 5G (e.g., sixth generation (6G) ) .SUMMARY
[0003] The present disclosure relates to a user equipment (UE) , a processor for wireless communication, a method, and a computer readable medium for supporting event triggered channel state information (CSI) reporting.
[0004] In a first aspect, there is provided a UE. The UE comprises: a processor; and a transceiver coupled to the processor, wherein the processor is configured to: receive, from a network entity, a channel state information (CSI) report configuration for event triggered CSI reporting; determine a priority of an event-triggered CSI report associated with the CSI report configuration; and transmit the CSI report to the network entity based on the priority of the event-triggered CSI report.
[0005] In a second aspect, there is provided a processor for wireless communication. The processor comprises: at least one memory; and a controller coupled with the at least one memory and configured to cause the controller to: receive, from a network entity, a channel state information (CSI) report configuration for event triggered CSI reporting; determine a priority of an event-triggered CSI report associated with the CSI report configuration; and transmit the CSI report to the network entity based on the priority of the event-triggered CSI report.
[0006] In a third aspect, there is provided a method performed by a user equipment (UE) , the method comprising: receiving, from a network entity, a channel state information (CSI) report configuration for event triggered CSI reporting; determining a priority of an event-triggered CSI report associated with the CSI report configuration; and transmitting the CSI report to the network entity based on the priority of the event-triggered CSI report.
[0007] In a fourth aspect, there is provided a non-transitory computer readable medium having instructions stored thereon, the instructions, when executed by a processor of an apparatus, causing the apparatus to perform the method according to the third aspect of the disclosure.
[0008] In some implementations of the method and the UE described herein, to determine a priority for an event-triggered CSI report configured with the CSI report configuration, the UE may determine that the priority of the event-triggered CSI report is higher than that of aperiodic CSI reports to be carried on physical uplink shared channel (PUSCH) .
[0009] In some implementations of the method and the UE described herein, to determine a priority for an event-triggered CSI report configured with the CSI report configuration, the UE may determine that the priority of the event-triggered CSI report is the same as that of aperiodic CSI reports to be carried on PUSCH.
[0010] In some implementations of the method and the UE described herein, to determine a priority for an event-triggered CSI report configured with the CSI report configuration, the UE may determine that the priority of the event-triggered CSI report is lower than that of aperiodic CSI reports to be carried on PUSCH, but higher than semi-persistent CSI reports to be carried on the PUSCH.
[0011] In some implementations of the method and the UE described herein, the CSI report configuration is a L1 / L2 triggered mobility (LTM) CSI report configuration for event triggered CSI reporting, and the UE may determine that a CSI processing unit (CPU) is occupied for the LTM CSI report configuration, from the first symbol of the earliest one of each transmission occasion of periodic CSI-RS or synchronization signal / PBCH block (SSB) resources for channel measurement for Layer-1 reference signal received power (L1-RSRP) computation, until a predefined number of symbols after the last symbol of the latest one of the CSI-RS or SSB resources.
[0012] In some implementations of the method and the UE described herein, the event triggered CSI report is carried by a measurement report (MR) medium access control control element (MAC CE) , and the UE may determine that one or more CPUs are occupied from the first symbols after a PUCCH carrying an MR scheduling request (SR) until the last symbol of a PUSCH carrying the MR MAC CE.
[0013] In some implementations of the method and the UE described herein, the event triggered CSI report is carried by an uplink control information (UCI) in a PUSCH scheduled by a downlink control information (DCI) , and the UE may determine that one or more CPUs are occupied from the first symbol after a PDCCH including the DCI, until the last symbol of the PUSCH carrying the event triggered CSI report.
[0014] In some implementations of the method and the UE described herein, the event triggered CSI report is carried by a UCI in a configured granted PUSCH associated with a PUCCH resource, and the UE may determine that one or more CPUs are occupied from the first symbol after the PUCCH resource indicating the event triggered CSI report until the last symbol of the PUSCH carrying the event triggered CSI report.
[0015] In some implementations of the method and the UE described herein, the CSI report configuration for event triggered CSI reporting is a LTM CSI report configuration associated with a SSB resource set and a non-zero power (NZP) CSI-RS resource set, and wherein each NZP CSI-RS resource in the NZP CSI-RS resource set is associated with the SSB resource in the SSB resource set, and the NZP CSI-RS resource is associated with a candidate cell that is associated with the SSB resource.
[0016] In some implementations of the method and the UE described herein, the CSI report configuration for event triggered CSI reporting is a LTM CSI report configuration, and wherein candidate cell beams are configured for the LTM CSI report configuration for the event triggered beam report for LTM, and all the candidate cell beam RS resources are configured with a same periodicity.
[0017] In some implementations of the method and the UE described herein, a current beam RS resource of a serving cell is used to trigger the event triggered CSI report, and wherein the candidate cell beam RS resources and the current beam RS resource in the serving cell are configured with the same periodicity.
[0018] In some implementations of the method and the UE described herein, the CSI report configuration for event triggered CSI reporting is a LTM CSI report configuration, and the UE may stop a time to trigger (TTT) timer or restart a periodical reporting timer when one or more of the following conditions are satisfied: a reference signal determined by a current transmission configuration indication (TCI) state of a serving cell is changed, or a downlink (DL) or joint TCI state of the serving cell is changed; at least one candidate beam RS associated with the LTM CSI report configuration is reconfigured by upper layers; an entry condition for candidate cell RS is no longer satisfied; the serving cell is deactivated; a leaving condition for candidate cell RS is satisfied; the UE receives a cell switch command; the UE receives an L3 handover command; or at least one parameter to determine the entry condition or the leaving conditions is reconfigured by the upper layers.
[0019] In some implementations of the method and the UE described herein, the CSI report configuration for event triggered CSI reporting is a LTM CSI report configuration, and an MR MAC CE carrying the CSI report is trigger by a TTT timer corresponding to an event, wherein the UE may further calculate at least one L1-RSRP in the MR MAC CE based on the latest RS resource transmission occasions before the TTT timer expires.
[0020] In some implementations of the method and the UE described herein, the CSI report configuration for event triggered CSI reporting is a LTM CSI report configuration, and an MR MAC CE carrying the CSI report is trigger by a TTT timer corresponding to an event, wherein the UE may further calculate at least one L1-RSRP in the MR MAC CE based on the first RS resource transmission occasion after the TTT timer expires.
[0021] In some implementations of the method and the UE described herein, the CSI report configuration for event triggered CSI reporting is a LTM CSI report configuration, and an MR MAC CE carrying the CSI report is trigger by a TTT timer corresponding to an event, wherein the UE may further calculate at least one L1-RSRP in the MR MAC CE based on the most recent RS resource transmission occasion no later than a CSI reference resource determine by a slot carrying the MR MAC CE.
[0022] In some implementations of the method and the UE described herein, the CSI report configuration for event triggered CSI reporting is a LTM CSI report configuration, and an MR MAC CE carrying the CSI report is triggered by a periodical reporting timer within duration of a TTT timer, wherein the UE may further calculate at least one L1-RSRP in the MR MAC CE based on the latest CSI-RS transmission occasion before the periodical reporting timer expires.
[0023] In some implementations of the method and the UE described herein, the CSI report configuration for event triggered CSI reporting is a LTM CSI report configuration, and an MR MAC CE carrying the CSI report is triggered by a leaving event condition, wherein the UE may further calculate at least one L1-RSRP in the MR MAC CE based on the first RS resource transmission occasion satisfying the leaving event condition.BRIEF DESCRIPTION OF THE DRAWINGS
[0024] FIG. 1 illustrates an example of a wireless communications system in which some embodiments of the present disclosure can be implemented.
[0025] FIG. 2 illustrates a process flow for supporting event triggered CSI reporting in accordance with some example embodiments of the present disclosure.
[0026] FIG. 3 illustrates a schematic diagram of CSI processing unit (CPU) occupation for an LTM event in accordance with some example embodiments of the present disclosure.
[0027] FIG. 4 illustrates a schematic diagram of CPU occupation for another LTM event in accordance with some example embodiments of the present disclosure.
[0028] FIG. 5 illustrates a schematic diagram of examples of CPU occupation for uplink control information (UCI) -based UE initiated beam report (UEI BR) in accordance with some example embodiments of the present disclosure.
[0029] FIG. 6 illustrates an example of a device that is suitable for implementing some embodiments of the present disclosure.
[0030] FIG. 7 illustrates an example of a processor that is suitable for implementing some embodiments of the present disclosure.
[0031] FIG. 8 illustrates a flowchart of a method that performed by a UE in accordance with aspects of the present disclosure.
[0032] Throughout the drawings, the same or similar reference numerals represent the same or similar elements.DETAILED DESCRIPTION
[0033] Principles of the present disclosure will now be described with reference to some embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. The disclosure described herein can be implemented in various manners other than the ones described below. In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.
[0034] References in the present disclosure to “one embodiment, ” “an example embodiment, ” “an embodiment, ” “some embodiments, ” and the like indicate that the embodiment (s) described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases do not necessarily refer to the same embodiment (s) . Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
[0035] It shall be understood that although the terms “first” and “second” or the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could also be termed as a second element, and similarly, a second element could also be termed as a first element, without departing from the scope of embodiments. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms. In some examples, values, procedures, or apparatuses are referred to as “best, ” “lowest, ” “highest, ” “minimum, ” “maximum, ” or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
[0036] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of embodiments. As used herein, the singular forms “a, ” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises, ” “comprising, ” “has, ” “having, ” “includes” and / or “including, ” when used herein, specify the presence of stated features, elements, components and / or the like, but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof. For example, the term “includes” and its variants are to be read as open terms that mean “includes, but is not limited to. ” The term “based on” is to be read as “based at least in part on. ” The term “one embodiment” and “an embodiment” are to be read as “at least one embodiment. ” The term “another embodiment” is to be read as “at least one other embodiment. ” The use of an expression such as “A and / or B” can mean either “only A” or “only B” or “both A and B. ” Other definitions, explicit and implicit, may be included below.
[0037] Event triggered CSI reporting, also referred to as UE initiated (UEI) or event driven CSI reporting is being specified in Rel-19 to avoid the frequent periodic or aperiodic CSI report. A UE can initiate a CSI report procedure based on one or more specified Layer-1 (L1) events. When the condition corresponding to an event is satisfied, the UE may send a message e.g., using a physical uplink control channel (PUCCH) , to trigger the CSI reporting procedure.
[0038] L1 / L2 triggered mobility (LTM) is specified in NR Rel-18 based on the L1 measurement on the candidate cell synchronization signal / PBCH block (SSB) resources. Considering that channel state information reference signal (CSI-RS) beam, which is usually narrow than the SSB beam with higher beam gain, is used for the data transmission in radio resource control (RRC) connected mode, it is expected to immediately use the CSI-RS beam for data transmission after switch to a new target cell for higher data rate transmission. CSI-RS based beam measurement and report for LTM is being specified in NR Rel-19 including the gNB controlled and UE initiated beam report.
[0039] However, some issues to support the CSI-RS based beam measurement and reporting for LTM have not been studied. Those issues include priority rule (s) for CSI report for the event-triggered reporting, CSI process occupation (CPU) for the event-triggered reporting, configuration on the CSI-RS resources for beam measurement for LTM, UE behavior about condition (s) to stop the time-to-trigger (TTT) timer, and definition of CSI reference resources for the L1-RSRP calculation for UE initiated beam report. Embodiments of the disclosure targets to address one or more of the noted issues.
[0040] In this disclosure, the expression “event triggered” can be interchangeably referred to as “event driven” or “UE initiated” (UEI) . ”
[0041] Aspects of the present disclosure are described in the context of a wireless communications system. FIG. 1 illustrates an example of a wireless communications system 100 in which some embodiments of the present disclosure can be implemented. The wireless communications system 100 may include one or more network entities 102 (also referred to as network equipment (NE) ) , one or more UEs 104, a core network 106, and a packet data network 108. The wireless communications system 100 may support various radio access technologies. In some implementations, the wireless communications system 100 may be a 4G network, such as an LTE network or an LTE-Advanced (LTE-A) network. In some other implementations, the wireless communications system 100 may be a 5G network, such as an NR network. In other implementations, the wireless communications system 100 may be a combination of a 4G network and a 5G network, or other suitable radio access technology including Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20. The wireless communications system 100 may support radio access technologies beyond 5G. Additionally, the wireless communications system 100 may support technologies, such as time division multiple access (TDMA) , frequency division multiple access (FDMA) , or code division multiple access (CDMA) , etc.
[0042] The one or more network entities 102 may be dispersed throughout a geographic region to form the wireless communications system 100. One or more of the network entities 102 described herein may be or include or may be referred to as a network node, a base station, a network element, a radio access network (RAN) , a base transceiver station, an access point, a NodeB, an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. A network entity 102 and a UE 104 may communicate via a communication link 110, which may be a wireless or wired connection. For example, a network entity 102 and a UE 104 may perform wireless communication (e.g., receive signalling, transmit signalling) over a Uu interface. In a 3GPP non-terrestrial network (NTN) , a network entity 102 in form of a satellite can directly communicate to UE 104 using NR / LTE Uu interface. The satellite may be a transparent satellite or a regenerative satellite. For NTN with a transparent satellite, a base station on earth may communicate with a UE via the satellite. For NTN with a regenerative satellite, the base station may be on board and directly communicate with the UE.
[0043] A network entity 102 may provide a geographic coverage area 112 for which the network entity 102 may support services (e.g., voice, video, packet data, messaging, broadcast, etc. ) for one or more UEs 104 within the geographic coverage area 112. For example, a network entity 102 and a UE 104 may support wireless communication of signals related to services (e.g., voice, video, packet data, messaging, broadcast, etc. ) according to one or multiple radio access technologies. In some implementations, a network entity 102 may be moveable, for example, a satellite associated with a non-terrestrial network. In some implementations, different geographic coverage areas 112 associated with the same or different radio access technologies may overlap, but the different geographic coverage areas 112 may be associated with different network entities 102. Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0044] The one or more UEs 104 may be dispersed throughout a geographic region of the wireless communications system 100. A UE 104 may include or may be referred to as a mobile device, a wireless device, a remote device, a remote unit, a handheld device, or a subscriber device, or some other suitable terminology. In some implementations, the UE 104 may be referred to as a unit, a station, a terminal, or a client, among other examples. Additionally, or alternatively, the UE 104 may be referred to as an Internet-of-Things (IoT) device, an Internet-of-Everything (IoE) device, or machine-type communication (MTC) device, among other examples. In some implementations, a UE 104 may be stationary in the wireless communications system 100. In some other implementations, a UE 104 may be mobile in the wireless communications system 100.
[0045] The one or more UEs 104 may be devices in different forms or having different capabilities. Some examples of UEs 104 are illustrated in FIG. 1. A UE 104 may be capable of communicating with various types of devices, such as the network entities 102, other UEs 104, or network equipment (e.g., the core network 106, the packet data network 108, a relay device, an integrated access and backhaul (IAB) node, or another network equipment) , as shown in FIG. 1. Additionally, or alternatively, a UE 104 may support communication with other network entities 102 or UEs 104, which may act as relays in the wireless communications system 100.
[0046] A UE 104 may also be able to support wireless communication directly with other UEs 104 over a communication link 114. For example, a UE 104 may support wireless communication directly with another UE 104 over a device-to-device (D2D) communication link. In some implementations, such as vehicle-to-vehicle (V2V) deployments, vehicle-to-everything (V2X) deployments, or cellular-V2X deployments, the communication link 114 may be referred to as a sidelink. For example, a UE 104 may support wireless communication directly with another UE 104 over a PC5 interface.
[0047] A network entity 102 may support communications with the core network 106, or with another network entity 102, or both. For example, a network entity 102 may interface with the core network 106 through one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The network entities 102 may communicate with each other over the backhaul links 116 (e.g., via an X2, Xn, or another network interface) . In some implementations, the network entities 102 may communicate with each other directly (e.g., between the network entities 102) . In some other implementations, the network entities 102 may communicate with each other or indirectly (e.g., via the core network 106) . In some implementations, one or more network entities 102 may include subcomponents, such as an access network entity, which may be an example of an access node controller (ANC) . An ANC may communicate with the one or more UEs 104 through one or more other access network transmission entities, which may be referred to as a radio heads, smart radio heads, or transmission-reception points (TRPs) . As used herein, the term “TRP” refers to a transmission-reception point having an antenna array (with one or more antenna elements) at the network side located at a specific geographical location, which may be used for transmitting and receiving signals to / from the terminal device. In embodiment of the present disclosure, a TRP may refer to Macro Cell, micro cell, an RRH, a relay, a femto node, a pico node, etc.
[0048] In some implementations, a network entity 102 may be configured in a disaggregated architecture, which may be configured to utilize a protocol stack physically or logically distributed among two or more network entities 102, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance) , or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN) ) . For example, a network entity 102 may include one or more of a central unit (CU) , a distributed unit (DU) , a radio unit (RU) , a RAN Intelligent Controller (RIC) (e.g., a Near-Real Time RIC (Near-RT RIC) , a Non-Real Time RIC (Non-RT RIC) ) , a Service Management and Orchestration (SMO) system, or any combination thereof.
[0049] An RU may also be referred to as a radio head, a smart radio head, a remote radio head (RRH) , a remote radio unit (RRU) , or a transmission reception point (TRP) . One or more components of the network entities 102 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 102 may be located in distributed locations (e.g., separate physical locations) . In some implementations, one or more network entities 102 of a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU) , a virtual DU (VDU) , a virtual RU (VRU) ) .
[0050] Split of functionality between a CU, a DU, and an RU may be flexible and may support different functionalities depending upon which functions (e.g., network layer functions, protocol layer functions, baseband functions, radio frequency functions, and any combinations thereof) are performed at a CU, a DU, or an RU. For example, a functional split of a protocol stack may be employed between a CU and a DU such that the CU may support one or more layers of the protocol stack and the DU may support one or more different layers of the protocol stack. In some implementations, the CU may host upper protocol layer (e.g., a layer 3 (L3) , a layer 2 (L2) ) functionality and signalling (e.g., Radio Resource Control (RRC) , service data adaption protocol (SDAP) , Packet Data Convergence Protocol (PDCP) ) . The CU may be connected to one or more DUs or RUs, and the one or more DUs or RUs may host lower protocol layers, such as a layer 1 (L1) (e.g., physical (PHY) layer) or an L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signalling, and may each be at least partially controlled by the CU 160.
[0051] Additionally, or alternatively, a functional split of the protocol stack may be employed between a DU and an RU such that the DU may support one or more layers of the protocol stack and the RU may support one or more different layers of the protocol stack. The DU may support one or multiple different cells (e.g., via one or more RUs) . In some implementations, a functional split between a CU and a DU, or between a DU and an RU may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU, a DU, or an RU, while other functions of the protocol layer are performed by a different one of the CU, the DU, or the RU) .
[0052] A CU may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions. A CU may be connected to one or more DUs via a midhaul communication link (e.g., F1, F1-c, F1-u) , and a DU may be connected to one or more RUs via a fronthaul communication link (e.g., open fronthaul (FH) interface) . In some implementations, a midhaul communication link or a fronthaul communication link may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities 102 that are in communication via such communication links.
[0053] The core network 106 may support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. The core network 106 may be an evolved packet core (EPC) , or a 5G core (5GC) , which may include a control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management functions (AMF) ) and a user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) . In some implementations, the control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management (e.g., data bearers, signal bearers, etc. ) for the one or more UEs 104 served by the one or more network entities 102 associated with the core network 106.
[0054] The core network 106 may communicate with the packet data network 108 over one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The packet data network 108 may include an application server 118. In some implementations, one or more UEs 104 may communicate with the application server 118. A UE 104 may establish a session (e.g., a protocol data unit (PDU) session, or the like) with the core network 106 via a network entity 102. The core network 106 may route traffic (e.g., control information, data, and the like) between the UE 104 and the application server 118 using the established session (e.g., the established PDU session) . The PDU session may be an example of a logical connection between the UE 104 and the core network 106 (e.g., one or more network functions of the core network 106) .
[0055] In the wireless communications system 100, the network entities 102 and the UEs 104 may use resources of the wireless communications system 100 (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) ) to perform various operations (e.g., wireless communications) . In some implementations, the network entities 102 and the UEs 104 may support different resource structures. For example, the network entities 102 and the UEs 104 may support different frame structures. In some implementations, such as in 4G, the network entities 102 and the UEs 104 may support a single frame structure. In some other implementations, such as in 5G and among other suitable radio access technologies, the network entities 102 and the UEs 104 may support various frame structures (i.e., multiple frame structures) . The network entities 102 and the UEs 104 may support various frame structures based on one or more numerologies.
[0056] One or more numerologies may be supported in the wireless communications system 100, and a numerology may include a subcarrier spacing and a cyclic prefix. A first numerology (e.g., μ=0) may be associated with a first subcarrier spacing (e.g., 15 kHz) and a normal cyclic prefix. In some implementations, the first numerology (e.g., μ=0) associated with the first subcarrier spacing (e.g., 15 kHz) may utilize one slot per subframe. A second numerology (e.g., μ=1) may be associated with a second subcarrier spacing (e.g., 30 kHz) and a normal cyclic prefix. A third numerology (e.g., μ=2) may be associated with a third subcarrier spacing (e.g., 60 kHz) and a normal cyclic prefix or an extended cyclic prefix. A fourth numerology (e.g., μ=3) may be associated with a fourth subcarrier spacing (e.g., 120 kHz) and a normal cyclic prefix. A fifth numerology (e.g., μ=4) may be associated with a fifth subcarrier spacing (e.g., 240 kHz) and a normal cyclic prefix.
[0057] A time interval of a resource (e.g., a communication resource) may be organized according to frames (also referred to as radio frames) . Each frame may have a duration, for example, a 10 millisecond (ms) duration. In some implementations, each frame may include multiple subframes. For example, each frame may include 10 subframes, and each subframe may have a duration, for example, a 1 ms duration. In some implementations, each frame may have the same duration. In some implementations, each subframe of a frame may have the same duration.
[0058] Additionally or alternatively, a time interval of a resource (e.g., a communication resource) may be organized according to slots. For example, a subframe may include a number (e.g., quantity) of slots. The number of slots in each subframe may also depend on the one or more numerologies supported in the wireless communications system 100. For instance, the first, second, third, fourth, and fifth numerologies (i.e., μ=0, μ=1, μ=2, μ=3, μ=4) associated with respective subcarrier spacings of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz may utilize a single slot per subframe, two slots per subframe, four slots per subframe, eight slots per subframe, and 16 slots per subframe, respectively. Each slot may include a number (e.g., quantity) of symbols (e.g., OFDM symbols) . In some implementations, the number (e.g., quantity) of slots for a subframe may depend on a numerology. For a normal cyclic prefix, a slot may include 14 symbols. For an extended cyclic prefix (e.g., applicable for 60 kHz subcarrier spacing) , a slot may include 12 symbols. The relationship between the number of symbols per slot, the number of slots per subframe, and the number of slots per frame for a normal cyclic prefix and an extended cyclic prefix may depend on a numerology. It should be understood that reference to a first numerology (e.g., μ=0) associated with a first subcarrier spacing (e.g., 15 kHz) may be used interchangeably between subframes and slots.
[0059] In the wireless communications system 100, an electromagnetic (EM) spectrum may be split, based on frequency or wavelength, into various classes, frequency bands, frequency channels, etc. By way of example, the wireless communications system 100 may support one or multiple operating frequency bands, such as frequency range designations FR1 (410 MHz –7.125 GHz) , FR2 (24.25 GHz –52.6 GHz) , FR3 (7.125 GHz –24.25 GHz) , FR4 (52.6 GHz –114.25 GHz) , FR4a or FR4-1 (52.6 GHz –71 GHz) , and FR5 (114.25 GHz –300 GHz) . In some implementations, the network entities 102 and the UEs 104 may perform wireless communications over one or more of the operating frequency bands. In some implementations, FR1 may be used by the network entities 102 and the UEs 104, among other equipment or devices for cellular communications traffic (e.g., control information, data) . In some implementations, FR2 may be used by the network entities 102 and the UEs 104, among other equipment or devices for short-range, high data rate capabilities.
[0060] FR1 may be associated with one or multiple numerologies (e.g., at least three numerologies) . For example, FR1 may be associated with a first numerology (e.g., μ=0) , which includes 15 kHz subcarrier spacing; a second numerology (e.g., μ=1) , which includes 30 kHz subcarrier spacing; and a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing. FR2 may be associated with one or multiple numerologies (e.g., at least 2 numerologies) . For example, FR2 may be associated with a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing; and a fourth numerology (e.g., μ=3) , which includes 120 kHz subcarrier spacing.
[0061] FIG. 2 illustrates a process flow 200 for supporting event triggered CSI reporting in accordance with some example embodiments of the present disclosure. The process flow 200 may involve a UE 201 and a network entity (NW) (e.g. a base station, such as gNB) 202. The process flow 200 may be applied to the wireless communications system 100 with reference to FIG. 1, for example, the UE 201 may be any of UEs 104, and the network entity 202 may be or comprise any of the network entities 102. For example, the network entity 202 may be or include a base station providing a serving cell for the UE 201 and / or base station (s) providing candidate cell (s) . It would be appreciated that the process flow 200 may be applied to other communication scenarios.
[0062] At 210, the network entity 202 transmits, to the UE 201, a channel state information (CSI) report configuration 215 for event triggered CSI reporting. Correspondingly, at 220, the UE 201 receives the CSI report configurations 215 from the network entity 202. The UE 201 may initiate a CSI report procedure when event (s) corresponding to the CSI report configuration 215 occur.
[0063] At 230, the UE 201 determines a priority of an event-triggered CSI report associated with the CSI report configuration. The UE 201 can be configured with multiple CSI report configurations that are associated with one PUCCH resource for event-triggered reporting. In this case, the UE 201 shall select one of CSI reports with a higher priority to report when the events associated with the multiple CSI report configurations occur.
[0064] In some embodiments, the UE 201 may determine that the priority of the event-triggered CSI report is higher than that of aperiodic CSI reports to be carried on physical uplink shared channel (PUSCH) . Alternatively, the UE 201 may determine that the priority of the event-triggered CSI report is the same as that of aperiodic CSI reports to be carried on PUSCH. Alternatively, the UE 201 may determine that the priority of the event-triggered CSI report is lower than that of aperiodic CSI reports to be carried on PUSCH, but higher than semi-persistent CSI reports to be carried on the PUSCH.
[0065] At 240, the UE 201 transmits the event-triggered CSI report 245 to the network entity 202 based on the priority of the event-triggered CSI report. Correspondingly, at 250, the network entity 202 receives the event-triggered CSI report 245.
[0066] In some embodiments, the UE 201 may determine the priority of the event-triggered CSI report based on the priority rule as described below.
[0067] There are following CSI report types specified in NR: LTM CSI report configured by LTM-CSI-ReportConfig and CSI report configured by CSI-ReportConfig. Each CSI report is associated with a priority value PriiCSI (y, k, c, s) =2·Ncells·Ms·y+Ncells·Ms·Ms·c+s, where - 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; - k=0 for CSI reports carrying L1-RSRP or L1-SINR (signal to interference plus noise ratio) and k=1 for CSI reports not carrying L1-RSRP or L1-SINR; - 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. - s is the reportConfigID and M is the value of the higher layer parameter maxNrofCSI- ReportConfigurations; 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
[0068] A first CSI report is said to have priority over second CSI report if the associated PriiCSI (y, k, c, s) value is lower for the first report than for the second report. 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.
[0069] Considering that the event driven beam report is also carried by PUSCH, either LTM beam report over MAC CE or the UEI beam report over UCI, the event driven beam report may have the following three potential priority.
[0070] In Option 1, the event driven CSI report carried on PUSCH (including the MAC CE and UCI based report) has a higher priority than aperiodic CSI reports to be carried on PUSCH. For this option, the y values for the PriiCSI (y, k, c, s) calculation can be as follows. - y=0 for event driven CSI reports to be carried on PUSCH, y=1 for aperiodic CSI reports to be carried on PUSCH, y=2 for semi-persistent CSI reports to be carried on PUSCH, y=3 for semi-persistent CSI reports to be carried on PUCCH and y= 4 for periodic CSI reports to be carried on PUCCH.
[0071] In Option 2, the event driven CSI report carried on PUSCH (including the MAC CE and UCI based report) has the same priority as aperiodic CSI reports to be carried on PUSCH. For this option, the y values for the PriiCSI (y, k, c, s) calculation can be as follows. - y=0 for aperiodic CSI reports and event driven 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.
[0072] In Option 3, the event driven CSI report carried on PUSCH (including the MAC CE and UCI based report) has a lower priority than aperiodic CSI reports to be carried on PUSCH, but has a higher priority over the semi-persistent CSI reports to be carried on PUSCH.. For this option, the y values for the PriiCSI (y, k, c, s) calculation can be as follows. - y=0 for aperiodic CSI reports to be carried on PUSCH, y=1 for event driven CSI reports to be carried on PUSCH, y=2 for semi-persistent CSI reports to be carried on PUSCH, y=3 for semi-persistent CSI reports to be carried on PUCCH and y= 4 for periodic CSI reports to be carried on PUCCH.
[0073] Regarding CSI processing unit (CPU) occupation issue, a CPU can be occupied for a LTM CSI report configuration for event triggered beam report, from the first symbol of the earliest one of each transmission occasion of periodic CSI-RS or SSB resources for channel measurement for L1-RSRP computation, until Z3′ symbols after the last symbol of the latest one of the CSI-RS or SSB resources for channel measurement for L1-RSRP computation in each transmission occasion, where Z3′ symbols can be a predefined value and is used for the UE to obtain the L1-RSRP (s) for reporting.
[0074] The CSI report configuration may be a LTM CSI report configuration for event triggered CSI reporting. Different events can be configured for the LTM CSI report configurations for event triggered beam report for LTM. The CPU occupation may vary depending on the event (s) configured for the LTM CSI report configuration. The event (s) may include one or more of: - Event LTM2: Beam of serving cell becomes worse than absolute threshold; - Event LTM3: Beam of candidate cell becomes amount of offset better than beam of serving cell; - Event LTM4: Beam of candidate cell becomes better than absolute threshold; - Event LTM5: Beam of serving cell becomes worse than absolute threshold1 AND Beam of candidate cell becomes better than another absolute threshold2.
[0075] FIG. 3 illustrates a schematic diagram of CPU occupation for Event LTM3 and LTM5 in accordance with some example embodiments of the present disclosure. For Event LTM3 and Event LTM5, the CSI-RS or SSB resources for channel measurement for L1-RSRP computation includes the CSI-RS or SSB resources from candidate cells associated with the LTM CSI report configuration and the CSI-RS or SSB resource corresponding to the current beam of the serving cell.
[0076] FIG. 4 illustrates a schematic diagram of CPU occupation for Event LTM2 in accordance with some example embodiments of the present disclosure. For Event LTM2, the CSI-RS or SSB resources for channel measurement for L1-RSRP computation includes the CSI-RS or SSB resource corresponding to the current beam of the serving cell.
[0077] For Event LTM4, the CSI-RS or SSB resources for channel measurement for L1-RSRP computation includes the CSI-RS or SSB resources from candidate cells associated with the LTM CSI report configuration.
[0078] Additionally, if the UE sends a PUCCH carrying the measurement report (MR) scheduling request (SR) , additional CPU (s) is occupied from the first symbols after the PUCCH carrying the MR SR until the last symbol of the PUSCH carrying the MR MAC CE to ensure that the UE can report a valid MR MAC CE, as shown in FIG. 3 and FIG. 4.
[0079] The additional CPU occupation mechanism can also be applied to the UE initiated beam report (UEIBR) based on events over UCI. Two reporting modes, Mode A and Mode B, are specified for the UEI beam report.
[0080] For Mode A, the UE transmits a first PUCCH to request a resource for a second UL channel to carry beam report, and the NW may send a DCI scheduling a second PUSCH for the UE to send the beam report in response the first PUCCH. For mode B, the UE may directly send the beam report in a configured PUSCH resource which is associated with the first PUCCH resource.
[0081] The corresponding CPU occupation mechanism can be determined as follows. An illustration is provided in FIG. 5.
[0082] With reference to FIG. 5, for mode A, the additional CPU (s) is occupied from the first symbol after the PDCCH response the first PUCCH resource until the last symbol of the PUSCH carrying the beam report. For mode B, the additional CPU (s) is occupied from the first symbol after the PUCCH indicating a UEI beam report until the last symbol of the PUSCH carrying the beam report.
[0083] In some embodiments, the CSI report configuration for event triggered CSI reporting may be a LTM CSI report configuration. In this case, the LTM CSI report configuration may be associated with a SSB resource set and a non-zero power (NZP) CSI-RS resource set. Each NZP CSI-RS resource in the NZP CSI-RS resource set may be associated with the SSB resource in the SSB resource set, and the NZP CSI-RS resource is associated with a candidate cell that is associated with the SSB resource. The explanations are as follows.
[0084] A list of LTM-CSI-ReportConfig (s) , which configures one or more LTM CSI report configurations, can be configured in LTM-Config IE, where each LTM-CSI-ReportConfig is associated with an LTM-CSI-ResourceConfig. The LTM-CSI-RS-ResourceSet in the LTM-CSI-ResourceConfig contains non-zero-power (NZP) CSI-RS resources corresponding to multiple candidate cells. It was agreed to continue to carry the bits for SSB resource set when CSI-RS resource set is configured, where each CSI-RS resource is associated with a SSB resources in the SSB resource set. In intra-cell beam management, each periodic CSI-RS resource is configured with a transmission configuration indicator (TCI) state for the UE to obtain the quasi-colocation (QCL) parameters for the CSI-RS reception by RRC signaling. But for semi-persistent CSI-RS, the TCI state or QCL information is configured in the activation MAC CE command when the CSI-RS is activated. It was also agreed that an LTM CSI report configuration for L1-RSRP is associated with a single resource configuration that includes a single resource set containing CSI-RS resources corresponding to multiple candidate cells.
[0085] Given that, if the LTM-CSI-SSB-ResourceSet is continued to be configured in the LTM-CSI-ResourceConfig as agreed, additional LTM-CSI-RS-ResourceSet is further configured in the LTM-CSI-ResourceConfig, where each CSI-RS resource in LTM-CSI-RS-ResourceSet is associated with a SSB resource in LTM-CSI-SSB-ResourceSet for the UE to obtain the QCL-TypeC and QCL-TypeD parameters. The candidate cell for the CSI-RS resource is implicitly determined by the candidate cell for the associated SSB resource. The candidate cell information for each CSI-RS resource in the CSI-RS resource set may be implicitly determined by the associated SSB resource in the LTM-CSI-SSB-ResourceSet.
[0086] An example configuration of CSI-RS resources for beam report is show below.
[0087] When periodic CSI-RS resources are configured in the LTM-CSI-RS-ResourceSet, each CSI-RS resource may be configured with a TCI state containing a SSB index with QCL-TypeC and QCL-TypeD and is further associated with a LTM-CandidateID, which is used to identify a LTM candidate cell. For the corresponding CSI reporting, CRI k (k ≥ 0) corresponds to the configured (k+1) -th entry of associated nzp-CSI-RS-Resources in the corresponding NZP-CSI-RS-ResourceSet for channel measurement.
[0088] When semi-persistent CSI-RS resources are configured in the LTM-NZP-CSI-RS-ResourceSet, each CSI-RS resource may be associated with an LTM-CandidateID, which is used to identify an LTM candidate cell. The SSB resource associated with each of the SP CSI-RS resource can be provided in the semi-persistent (SP) CSI-RS Activation / Deactivation MAC CE. For the corresponding CSI reporting, the UE may be not expected to report the CRI corresponding to a CSI-RS resource that is not activated. Alternatively, in the CSI report, the CRI k (k ≥ 0) may correspond to the configured (k+1) -th entry of associated activated nzp-CSI-RS-Resources in the corresponding NZP-CSI-RS-ResourceSet for channel measurement.
[0089] In some embodiments, the CSI report configuration for event triggered CSI reporting may be a LTM CSI report configuration, and LTM event (s) , such as Event LTM2, Event LTM3, Event LTM4 or Event LTM5, can be configured for the LTM CSI report configuration for event triggered beam report for LTM.
[0090] In some embodiments, candidate cell beams are configured for the LTM CSI report configuration for the event triggered beam report for LTM, and all the candidate cell beam RS resources are configured with a same periodicity.
[0091] In some embodiments, a current beam RS resource of a serving cell is used to trigger the event triggered CSI report, and wherein the candidate cell beam RS resources and the current beam RS resource in the serving cell are configured with the same periodicity.
[0092] For Event LTM2, candidate cell beam can also be configured by the serving cell for the LTM CSI report configuration and in this case, the RS type for the current beam of the serving cell is determined by the RS type of the RS configured as the candidate cell beams. For example, when CSI-RS resources are configured as the candidate cell beam RS, the QCL-typeD RS of the current TCI state of the serving cell is taken as the current beam RS. When SSB resources are configured as the candidate cell beam RS, the SSB resource associated with the QCL-typeD RS of the current TCI state of the serving cell is taken as the current beam RS. For the beam report corresponding to Event LTM2, the UE can be configured to report N beam selected from the candidate cell beams. With this, when candidate cell beams are configured for a LTM CSI report configuration for event triggered beam report for LTM, the candidate cell beam RS resources and the current beam RS resources in the serving cell may be configured with the same periodicity.
[0093] Time-to-trigger (TTT) based event evaluation mechanism is used for the event driven or UE initiated beam report for LTM. If candidate cell beams are configured for the Event-LTM3, Event-LTM3 and Event-LTM5, each of the candidate cell beam RS resource can be associated with a TTT timer. If the entry condition for a candidate cell RS is satisfied, the TTT Timer will start, and the UE may stop the TTT timer and / or restart a periodical reporting timer when some condition (s) is satisfied.
[0094] One condition can be that a reference signal determined by a current TCI state of a serving cell is changed, or a DL or joint TCI state of the serving cell is changed, for example, by a DCI or a MAC CE or RRC. If so, the UE may stop the TTT timer and / or restart the periodical reporting timer.
[0095] Another condition can be that any of the candidate beam RS associated with the LTM CSI report configuration is reconfigured by upper layers, and if so, the UE may stop the TTT timer and / or restart the periodical reporting timer. Alternatively, the UE may only stop the TTT timer and / or the periodic reporting timer for the candidate beam RS (s) that is reconfigured, and the TTT timer and / or the periodic reporting timer for the candidate beam RS (s) that are not reconfigured are not stopped.
[0096] In addition, the condition (s) may further include any of the following: an entry condition for candidate cell RS is no longer satisfied, the serving cell is deactivated, a leaving condition for candidate cell RS is satisfied, the UE receives an L3 handover command or receives a cell switch command, and / or any parameters to determine the entry condition or the leaving conditions is reconfigured by the upper layers.
[0097] Hereafter the issue about CSI reference resource for MR MAC CE is discussed.
[0098] Different from the L3 beam report, where the reported RSRP is a filtered RSRP which is based on the current measurement and the historical measurement results, the report RSRP in the MR MAC CE is a L1-RSRP without any specified L1 or L2 filter. Considering that the L1 RSRP may be various according to the channel condition, similar with the L1-RSRP report in L1 UCI. A CSI reference resource may also be needed to align the understanding on the timestamp of reported L1-RSRP for UE and the NW.
[0099] For the MR MAC CE triggered by a TTT timer corresponding to an event, the UE may calculate L1-RSRP (s) based on the latest RS resource transmission occasions before the TTT expires, and include L1-RSRP (s) in the MR MAC CE.
[0100] Alternatively, the UE may calculate the L1-RSRP (s) in the MR MAC CE based on the first RS resource transmission occasion after the TTT timer expires.
[0101] Alternatively, the UE may calculate at least one L1-RSRP in the MR MAC CE based on the most recent RS resource transmission occasion no later than a CSI reference resource determine by a slot carrying the MR MAC CE. In this embodiment, the CSI reference resource is an available DL slot that is where the MR MAC CE is sent in slot n and is the required time to calculation the L1-RSRP for reporting, generate the MR MAC CE and prepare the PUSCH.
[0102] For event triggered periodic MR, the UE may calculate the L1-RSRP (s) in the MR MAC CE triggered by periodic reporting timer based on the latest RS transmission occasion before the periodical reporting timer expires.
[0103] For a MR MAC CE triggered by a leaving event condition, the UE may calculate the L1-RSRP (s) in the MR MAC CE based on the first RS resource transmission occasion satisfy the leaving event condition.
[0104] FIG. 6 illustrates an example of a device that is suitable for implementing some embodiments of the present disclosure. The device 600 may be an example of a UE 104 or network entity 102 as described herein. The device 600 may support wireless communication with one or more network entities 102, UEs 104, or any combination thereof. The device 600 may include components for bi-directional communications including components for transmitting and receiving communications, such as a processor 602, a memory 604, a transceiver 606, and, optionally, an I / O controller 608. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .
[0105] The processor 602, the memory 604, the transceiver 606, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. For example, the processor 602, the memory 604, the transceiver 606, or various combinations or components thereof may support a method for performing one or more of the operations described herein.
[0106] In some implementations, the processor 602, the memory 604, the transceiver 606, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include a processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some implementations, the processor 602 and the memory 604 coupled with the processor 602 may be configured to perform one or more of the functions described herein (e.g., executing, by the processor 602, instructions stored in the memory 604) .
[0107] For example, the processor 602 may support wireless communication at the device 600 in accordance with examples as disclosed herein. The device 600 may be an example of a UE 104. In this case, the processor 602 may be configured to operable to support means for receiving, from a network entity, a channel state information (CSI) report configuration for event triggered CSI reporting; means for determining a priority of an event-triggered CSI report associated with the CSI report configuration; and means for transmitting the CSI report to the network entity based on the priority of the event-triggered CSI report. The processor 602 may be configured to operable to support other means for performing any of the action (s) in the description.
[0108] The processor 602 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) . In some implementations, the processor 602 may be configured to operate a memory array using a memory controller. In some other implementations, a memory controller may be integrated into the processor 602. The processor 602 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 604) to cause the device 600 to perform various functions of the present disclosure.
[0109] The memory 604 may include random access memory (RAM) and read-only memory (ROM) . The memory 604 may store computer-readable, computer-executable code including instructions that, when executed by the processor 602 cause the device 600 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some implementations, the code may not be directly executable by the processor 602 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some implementations, the memory 604 may include, among other things, a basic I / O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
[0110] The I / O controller 608 may manage input and output signals for the device 600. The I / O controller 608 may also manage peripherals not integrated into the device 600. In some implementations, the I / O controller 608 may represent a physical connection or port to an external peripheral. In some implementations, the I / O controller 608 may utilize an operating system such as or another known operating system. In some implementations, the I / O controller 608 may be implemented as part of a processor, such as the processor 602. In some implementations, a user may interact with the device 600 via the I / O controller 608 or via hardware components controlled by the I / O controller 608.
[0111] In some implementations, the device 600 may include a single antenna 610. However, in some other implementations, the device 600 may have more than one antenna 610 (i.e., multiple antennas) , including multiple antenna panels or antenna arrays, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 606 may communicate bi-directionally, via the one or more antennas 610, wired, or wireless links as described herein. For example, the transceiver 606 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 606 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 610 for transmission, and to demodulate packets received from the one or more antennas 610. The transceiver 606 may include one or more transmit chains, one or more receive chains, or a combination thereof.
[0112] A transmit chain may be configured to generate and transmit signals (e.g., control information, data, packets) . The transmit chain may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques such as amplitude modulation (AM) , frequency modulation (FM) , or digital modulation schemes like phase-shift keying (PSK) or quadrature amplitude modulation (QAM) . The transmit chain may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over the wireless medium. The transmit chain may also include one or more antennas 610 for transmitting the amplified signal into the air or wireless medium.
[0113] A receive chain may be configured to receive signals (e.g., control information, data, packets) over a wireless medium. For example, the receive chain may include one or more antennas 610 for receive the signal over the air or wireless medium. The receive chain may include at least one amplifier (e.g., a low-noise amplifier (LNA) ) configured to amplify the received signal. The receive chain may include at least one demodulator configured to demodulate the receive signal and obtain the transmitted data by reversing the modulation technique applied during transmission of the signal. The receive chain may include at least one decoder for decoding the processing the demodulated signal to receive the transmitted data.
[0114] FIG. 7 illustrates an example of a processor 700 is suitable for implementing some embodiments of the present disclosure. The processor 700 may be an example of a processor configured to perform various operations in accordance with examples as described herein. The processor 700 may include a controller 702 configured to perform various operations in accordance with examples as described herein. The processor 700 may optionally include at least one memory 704. Additionally, or alternatively, the processor 700 may optionally include one or more arithmetic-logic units (ALUs) 706. One or more of these components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .
[0115] The processor 700 may be a processor chipset and include a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) in accordance with examples as described herein. The processor chipset may include one or more cores, one or more caches (e.g., memory local to or included in the processor chipset (e.g., the processor 700) or other memory (e.g., random access memory (RAM) , read-only memory (ROM) , dynamic RAM (DRAM) , synchronous dynamic RAM (SDRAM) , static RAM (SRAM) , ferroelectric RAM (FeRAM) , magnetic RAM (MRAM) , resistive RAM (RRAM) , flash memory, phase change memory (PCM) , and others) .
[0116] The controller 702 may be configured to manage and coordinate various operations (e.g., signalling, receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) of the processor 700 to cause the processor 700 to support various operations in accordance with examples as described herein. For example, the controller 702 may operate as a control unit of the processor 700, generating control signals that manage the operation of various components of the processor 700. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating timing of operations.
[0117] The controller 702 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 604 and determine subsequent instruction (s) to be executed to cause the processor 700 to support various operations in accordance with examples as described herein. The controller 702 may be configured to track memory address of instructions associated with the memory 704. The controller 702 may be configured to decode instructions to determine the operation to be performed and the operands involved. For example, the controller 702 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 700 to cause the processor 700 to support various operations in accordance with examples as described herein. Additionally, or alternatively, the controller 702 may be configured to manage flow of data within the processor 700. The controller 702 may be configured to control transfer of data between registers, arithmetic logic units (ALUs) , and other functional units of the processor 700.
[0118] The memory 704 may include one or more caches (e.g., memory local to or included in the processor 700 or other memory, such RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some implementation, the memory 604 may reside within or on a processor chipset (e.g., local to the processor 700) . In some other implementations, the memory 704 may reside external to the processor chipset (e.g., remote to the processor 700) .
[0119] The memory 704 may store computer-readable, computer-executable code including instructions that, when executed by the processor 700, cause the processor 700 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. The controller 702 and / or the processor 700 may be configured to execute computer-readable instructions stored in the memory 704 to cause the processor 700 to perform various functions (e.g., event triggered CSI reporting) . For example, the processor 700 and / or the controller 702 may be coupled with or to the memory 704, the processor 700, the controller 702, and the memory 704 may be configured to perform various functions described herein. In some examples, the processor 700 may include multiple processors and the memory 604 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein.
[0120] The one or more ALUs 706 may be configured to support various operations in accordance with examples as described herein. In some implementation, the one or more ALUs 706 may reside within or on a processor chipset (e.g., the processor 700) . In some other implementations, the one or more ALUs 706 may reside external to the processor chipset (e.g., the processor 700) . One or more ALUs 706 may perform one or more computations such as addition, subtraction, multiplication, and division on data. For example, one or more ALUs 706 may receive input operands and an operation code, which determines an operation to be executed. One or more ALUs 706 be configured with a variety of logical and arithmetic circuits, including adders, subtractors, shifters, and logic gates, to process and manipulate the data according to the operation. Additionally, or alternatively, the one or more ALUs 706 may support logical operations such as AND, OR, exclusive-OR (XOR) , not-OR (NOR) , and not-AND (NAND) , enabling the one or more ALUs 706 to handle conditional operations, comparisons, and bitwise operations.
[0121] The processor 700 may support wireless communication in accordance with examples as disclosed herein. The processor 700 may implemented at a UE 104. In this case, the processor 700 may be configured to operable to support means for receiving, from a network entity, a channel state information (CSI) report configuration for event triggered CSI reporting; means for determining a priority of an event-triggered CSI report associated with the CSI report configuration; and means for transmitting the CSI report to the network entity based on the priority of the event-triggered CSI report.
[0122] FIG. 8 illustrates a flowchart of a method 800 performed by a UE in accordance with aspects of the present disclosure. The operations of the method 800 may be implemented by a device or its components as described herein. For example, the operations of the method 800 may be performed by a UE 104 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.
[0123] At 810, the method may include receiving, from a network entity, a channel state information (CSI) report configuration for event triggered CSI reporting. The operations of 810 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 810 may be performed by a UE 104 as described with reference to FIG. 1.
[0124] At 820, the method may include determining a priority of an event-triggered CSI report associated with the CSI report configuration. The operations of 820 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 820 may be performed by a UE 104 as described with reference to FIG. 1.
[0125] At 830, the method may include transmitting the event-triggered CSI report to the network entity based on the priority of the event-triggered CSI report. The operations of 830 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 830may be performed by a UE 104 as described with reference to FIG. 1.
[0126] It should be noted that the methods described herein describes possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined.
[0127] The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
[0128] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
[0129] Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
[0130] As used herein, including in the claims, an article “a” before an element is unrestricted and understood to refer to “at least one” of those elements or “one or more” of those elements. The terms “a, ” “at least one, ” “one or more, ” and “at least one of one or more” may be interchangeable. As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of” or “one or both of” ) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. Further, as used herein, including in the claims, a “set” may include one or more elements.
[0131] The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.
Claims
1.A user equipment (UE) comprising:a processor; anda transceiver coupled to the processor,wherein the processor is configured to:receive, from a network entity, a channel state information (CSI) report configuration for event triggered CSI reporting;determine a priority of an event-triggered CSI report associated with the CSI report configuration; andtransmit the event-triggered CSI report to the network entity based on the priority of the event-triggered CSI report.2.The UE of claim 1, wherein to determine a priority for an event-triggered CSI report configured with the CSI report configuration, the processor is configured to:determine that the priority of the event-triggered CSI report is higher than that of aperiodic CSI reports to be carried on physical uplink shared channel (PUSCH) .3.The UE of claim 1, wherein to determine a priority for an event-triggered CSI report configured with the CSI report configuration, the processor is configured to:determine that the priority of the event-triggered CSI report is the same as that of aperiodic CSI reports to be carried on PUSCH.4.The UE of claim 1, wherein to determine a priority for an event-triggered CSI report configured with the CSI report configuration, the processor is configured to:determine that the priority of the event-triggered CSI report is lower than that of aperiodic CSI reports to be carried on PUSCH, but higher than semi-persistent CSI reports to be carried on the PUSCH.5.The UE of claim 1, wherein the CSI report configuration is a L1 / L2 triggered mobility (LTM) CSI report configuration for event triggered CSI reporting, and the processor is further configured to:determine that a CSI processing unit (CPU) is occupied for the LTM CSI report configuration, from the first symbol of the earliest one of each transmission occasion of periodic CSI-RS or synchronization signal / PBCH block (SSB) resources for channel measurement for Layer-1 reference signal received power (L1-RSRP) computation, until a predefined number of symbols after the last symbol of the latest one of the CSI-RS or SSB resources.6.The UE of claim 1, wherein the event triggered CSI report is carried by a measurement report (MR) medium access control control element (MAC CE) , and the processor is further configured to:determine that one or more CPUs are occupied from the first symbols after a PUCCH carrying an MR scheduling request (SR) until the last symbol of a PUSCH carrying the MR MAC CE.7.The UE of claim 1, wherein the event triggered CSI report is carried by an uplink control information (UCI) in a PUSCH scheduled by a downlink control information (DCI) , and the processor is further configured to:determine that one or more CPUs are occupied from the first symbol after a PDCCH including the DCI, until the last symbol of the PUSCH carrying the event triggered CSI report.8.The UE of claim 1, wherein the event triggered CSI report is carried by a UCI in a configured granted PUSCH associated with a PUCCH resource, and the processor is further configured to:determine that one or more CPUs are occupied from the first symbol after the PUCCH resource indicating the event triggered CSI report until the last symbol of the PUSCH carrying the event triggered CSI report.9.The UE of claim 1, wherein the CSI report configuration for event triggered CSI reporting is a LTM CSI report configuration associated with a SSB resource set and a non-zero power (NZP) CSI-RS resource set, andwherein each NZP CSI-RS resource in the NZP CSI-RS resource set is associated with the SSB resource in the SSB resource set, and the NZP CSI-RS resource is associated with a candidate cell that is associated with the SSB resource.10.The UE of claim 1, wherein the CSI report configuration for event triggered CSI reporting is a LTM CSI report configuration, andwherein candidate cell beams are configured for the LTM CSI report configuration for the event triggered beam report for LTM, and all the candidate cell beam RS resources are configured with a same periodicity.11.The UE of claim 10, wherein a current beam RS resource of a serving cell is used to trigger the event triggered CSI report, and wherein the candidate cell beam RS resources and the current beam RS resource in the serving cell are configured with the same periodicity.12.The UE of claim 1, wherein the CSI report configuration for event triggered CSI reporting is a LTM CSI report configuration, and the processor is further configured to:stop a time to trigger (TTT) timer or restart a periodical reporting timer when one or more of the following conditions are satisfied:a reference signal determined by a current transmission configuration indication (TCI) state of a serving cell is changed, or a downlink (DL) or joint TCI state of the serving cell is changed;at least one candidate beam RS associated with the LTM CSI report configuration is reconfigured by upper layers;an entry condition for candidate cell RS is no longer satisfied;the serving cell is deactivated;a leaving condition for candidate cell RS is satisfied;the UE receives a cell switch command or an L3 handover command; orat least one parameter to determine the entry condition or the leaving conditions is reconfigured by the upper layers.13.The UE of claim 1, wherein the CSI report configuration for event triggered CSI reporting is a LTM CSI report configuration, and an MR MAC CE carrying the CSI report is trigger by a TTT timer corresponding to an event, wherein the processor is further configured to:calculate at least one L1-RSRP in the MR MAC CE based on the latest RS resource transmission occasions before the TTT timer expires.14.The UE of claim 1, wherein the CSI report configuration for event triggered CSI reporting is a LTM CSI report configuration, and an MR MAC CE carrying the CSI report is trigger by a TTT timer corresponding to an event, wherein the processor is further configured to:calculate at least one L1-RSRP in the MR MAC CE based on the first RS resource transmission occasion after the TTT timer expires.15.The UE of claim 1, wherein the CSI report configuration for event triggered CSI reporting is a LTM CSI report configuration, and an MR MAC CE carrying the CSI report is trigger by a TTT timer corresponding to an event, wherein the processor is further configured to:calculate at least one L1-RSRP in the MR MAC CE based on the most recent RS resource transmission occasion no later than a CSI reference resource determine by a slot carrying the MR MAC CE.16.The UE of claim 1, wherein the CSI report configuration for event triggered CSI reporting is a LTM CSI report configuration, and an MR MAC CE carrying the CSI report is triggered by a periodical reporting timer within duration of a TTT timer, wherein the processor is further configured to:calculate at least one L1-RSRP in the MR MAC CE based on the latest CSI-RS transmission occasion before the periodical reporting timer expires.17.The UE of claim 1, wherein the CSI report configuration for event triggered CSI reporting is a LTM CSI report configuration, and an MR MAC CE carrying the CSI report is triggered by a leaving event condition, wherein the processor is further configured to:calculate at least one L1-RSRP in the MR MAC CE based on the first RS resource transmission occasion satisfying the leaving event condition.18.A processor for wireless communication, comprising:at least one memory; anda controller coupled with the at least one memory and configured to cause the controller to:receive, from a network entity, a channel state information (CSI) report configuration for event triggered CSI reporting;determine a priority of an event-triggered CSI report associated with the CSI report configuration; andtransmit the event-triggered CSI report to the network entity based on the priority of the event-triggered CSI report.19.A method performed by a user equipment (UE) , the method comprising:receiving, from a network entity, a channel state information (CSI) report configuration for event triggered CSI reporting;determining a priority of an event-triggered CSI report associated with the CSI report configuration; andtransmitting the event-triggered CSI report to the network entity based on the priority of the event-triggered CSI report.20.A non-transitory computer readable medium comprising program instructions that, when executed by an apparatus, cause the apparatus to perform at least:receiving, from a network entity, a channel state information (CSI) report configuration for event triggered CSI reporting;determining a priority of an event-triggered CSI report associated with the CSI report configuration; andtransmitting the event-triggered CSI report to the network entity based on the priority of the event-triggered CSI report.
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