Beam management procedures with event triggered report

Abstract

Methods and systems, where a UE performs, with a network entity, a first communication with one or more signals based on a first transmission configuration indicator (TCI) state. The first TCI states includes a first reference signal (RS) as a source RS for the one or more signals. The UE reports to the network entity a measurement quality of a second RS, with the measurement quality of the first and second RSs meeting an event criterion. The UE receives one or more control messages from the network entity in response, and applies a second TCI state for the one or more signals, the second TCI state comprising the second RS as a source RS. The UE and network entity then perform a second communication based on the one or more signals with the second TCI state. Other embodiments are disclosed.

Description

BEAM MANAGEMENT PROCEDURES WITH EVENT TRIGGERED REPORTCROSS-REFERENCE TO RELATED APPLICATIONS[oooi] This application claims the benefit of U.S. Provisional Application No. 63 / 703,061, filed on October 3, 2024, which application is hereby incorporated herein by reference.TECHNICAL FIELD

[0002] The present disclosure relates generally to methods, designs and apparatuses for beam management of wireless communication, and, in particular embodiments, to systems and designs for enhancements of wireless communication networks for beam switching and activation with low latency and signaling overhead.BACKGROUND

[0003] Beam management is one of the key technologies to enable the performance and coverage for 5G new radio (NR) and beyond, especially for operation in frequency range 2 (FR2), which may include frequency bands from 24.25 GHz to 71.0 GHz. To improve system performance and coverage of NR, the “best" downlink (DL) / uplink (UL) beams for control channel(s) and data channel(s) should be acquired and used by both the wireless device (e.g.. user equipment or UE) and the base station (e.g., next generation Node B or gNB). However, in existing beam management procedures, only the base station-configured physical layer (or layer 1 (LI)) beam measurement / reporting is supported and specified in current NR standard. More specifically, the base station may configure / activate frequent periodic or semi-persistent (P / SP) beam reporting (e.g.. reporting N “best" beams and corresponding layer 1 (LI) reference signal received power (Ll-RSRPs)) or may trigger frequent aperiodic (AP) beam reporting to acquire the “best” beams for data / control channel transmissions. Therefore, this frequent beam reporting configured by the base station may result in large UL reporting overhead and control signaling overhead. Conversely, if less frequent beam reporting is configured, the base station may not acquire "best” beam(s) as the beam reporting by the wireless device may be outdated, thus, leading to significant performance and coverage degradation, as well as long latency for beam measurement reports.

[0004] Even though P / SP / AP physical layer (LI) beam measurement reporting may be configured by the base station based on channel conditions, it may not work well in realistic deployments due to the balance between timely reporting and low reporting signaling overhead. Given that the UE has better and more-timely knowledge of beam quality changes (e.g., beam quality changes, due to UE rotation / movement or to overcome maximum permissible exposure(MPE) or interference issues, are not predictable from the base station side, but the wireless device may utilize various reference signals, measurements or even sensors to detect beam quality changes), a UE-initiated / event-driven or triggered beam reporting procedure, such as if criteria for certain events are fulfilled, may lead to more timely beam measurement reporting yet with reduced reporting signaling overhead. Under such a procedure, if a UE (or other wireless device) determines that the current beam quality becomes poor, the UE may trigger a beam measurement report without the need of a base station to configure or trigger frequent beam measurement reporting, which can significantly reduce signaling overhead and at same time some latency for beam measurement reporting.

[0005] More specifically, the latency of beam switching generally includes two parts: the first part involves the latency related to beam reporting itself; and the second part involves the latency for applying the new / reported beam(s) after the beam reporting. If only considering the UE-initiated / event-driven or triggered beam reporting itself without considering enhancements on how to apply the new beam, the potential latency reduction is very marginal, or may even result in a latency gain, compared to the existing beam management procedure. That is, the maximum reduction of latency from UE-initiated / event-driven or triggered beam reporting itself (e.g., latency reduction on the first part) is just only at a periodicity period level of periodic / semi- persistent (P / SP) beam reporting, compared with existing P / SP beam reporting. Additionally, if the shorter periodicity period of the existing P / SP beam reporting was used, less latency reduction is obtained for the first part latency reduction for UE-initiated / event-driven or triggered beam reporting compared with the existing P / SP beam reporting. Furthermore, if UE-initiated / event- driven beam reporting is triggered based on multiple event instances, the first part latency for UE- initiated / event-driven or triggered beam reporting may even be larger than the reporting latency of the existing P / SP beam reporting. From a beam application perspective, after UE-initiated / event- driven or triggered beam reporting, the UE (or wireless device) may still perform the existing beam management procedure to apply a new candidate beam, such as receiving radio resource control (RRC) reconfiguration, medium access control control element (MAC CE) activation and / or downlink control information (DCI) indication, etc., which clearly further prolongs the beam application time of UE side after the UE-initiated / event-driven or triggered beam reporting, and has no benefits for the second part of latency reduction from the existing beam management procedure. The application of a new (or candidate) beam may comprise beam switching or activation / deactivation for the new beam.

[0006] It should be understood that a beam may be referred to by a corresponding reference signal (RS) or a transmission configuration indicator (TCI) state. A beam may generally be thought of as a directed region of increased signal strength from an antenna (or antenna array, or plurality' of anteimas). A transmission using the beam can include one or more RSs that are thusassociated with or correspond to a specific beam and facilitate beam measurements. Similarly, a beam may correspond to a TCI state, which can specify various beam-related parameters, such as quasi-co-location information that is shared between the one or more RSs. Thus, reference to a RS or TCI state corresponding to a given beam can be considered to be referring to the beam itself.SUMMARY

[0007] The following example embodiments in disclosure can be combined or split to generate one or more new embodiments. All the procedures, elements, terms, behaviors, and / or the like described in an embodiment can be applied to, or combined with, one or more other embodiments to become one or more new embodiments.

[0008] If a network or base station (BS) can directly confirm / acknowledge reported beam(s) indicated by a UE-initiatcd / cvcnt-drivcn or triggered beam reporting, a significant latency reduction on the second part can be obtained by the UE via UE-initiated / event-driven or triggered beam reporting. That is, the UE can immediately apply the reported beam(s), indicated by the UE- initiated / event-driven or triggered beam reporting, after confirmation / acknowledgement by the BS. Thus, the existing beam management procedure for beam application, such as RRC reconfiguration, MAC CE activation, etc., can be replaced with just a confirmation / acknowledgement command / message from the BS after event triggered beam reporting, which can significantly reduce the latency and signaling overhead for beam application by the UE after the UE-initiated / event-driven or triggered beam reporting, meanwhile, facilitating fast beam switching / update / activation by the UE. On the other hand, if the BS still performs the existing beam application procedure after receiving UE-initiated / event-driven or triggered beam reporting with the reported beam(s), such as transmitting a RRC reconfiguration message, MAC CE activation, and / or DCI indication for the beam(s) reported in UE-initiated / event-driven or triggered beam reporting, it may result in both significantly larger latency and higher signaling overhead.

[0009] In some embodiments, a wireless device (such as a UE) may perfonn. with a network entity (e.g., gNB or Network controller), a first transmission or reception (i.e.. communication) of one or more signals (or channels) with a first TCI state. The first TCI state may include a first RS as a (QCL) source RS for the one or more signals / channels. A measurement quality of a second RS is reported by the wireless device to the network entity. An event criterion is met by the measurement quality of a second RS and a measurement quality of the first RS. A control message, which may be only one message or one or more messages, is received by the wireless device from the network entity. A second TCI state for the one or more signals / channels is applied by the wireless device in response to the control message. The second TCI state may include the second RS as a (QCL) source RS for the one or more signals / channels. The wirelessdevice may perform, with the network entity, a second communication (transmission and / or reception) of the one or more signals / channels with the second TCI state.[OOIO] In some embodiments, a wireless device may receive, from a network controller, only one, or one or more, radio resource control (RRC) message(s) comprising configuration parameters. The configuration parameters may indicate one or more reference signals (RSs) for beam measurements. The configuration parameters may indicate a plurality’ of first transmission configmation indicator (TCI) states. The configuration parameters may indicate a threshold value. The configuration parameters may indicate an association betw een the one or more RSs and one or more TCI states. The w ireless device may receive, from the netw ork controller, only one or one or more medium access control control element(s) (MAC CE) activating a plurality of second TCI states from the plurality’ of first TCI states. The wireless device may receive, from the netw ork controller, a dow nlink control information indicating a first TCI state from plurality of second TCI states. The wireless device may determine, based on an event evaluation, with the beam measurements of the one or more RSs, for an event, that a quality of at least one RS of the one or more RSs becomes the threshold value better than a first RS associated with the first TCI state. Such an event is called Event 2 throughout this application. The wireless device may transmit a beam measurement report indicating the at least one RS in response to the event being fulfilled. The wireless device may receive a confirmation command or an acknowledgement for the beam measurement report. The wireless device may replace, based on the association and the at least one RS. one or more TCI states of the plurality of second TCI states in response to receiving the confirmation command or the acknowdedgement.[ooil] In some embodiments, a wireless device may receive, from a network controller, one or more (or only one) radio resource control (RRC) messages comprising configuration parameters. The configuration parameters may indicate one or more reference signals (RSs) for beam measurements. The configuration parameters may indicate a plurality of first transmission configuration indicator (TCI) states. The configuration parameters may indicate a threshold value. The configuration parameters may indicate an association between the one or more RSs and one or more TCI lists. The wireless device may receive, from the network controller, a MAC CE activating a plurality of second TCI states from the plurality of first TCI states. The wireless device may receive, from the network controller, a downlink control information indicating a first TCI state from plurality of second TCI states. The wireless device may determine with the beam measurements of the one or more RSs. that Event 2 is fulfilled. The wireless device may transmit a beam measurement report indicating the at least one RS in response to Event 2 being fulfilled. The wireless device may receive a confirmation command or an acknowledgement for the beam measurement report. The wireless device may determine (or select), based on the association and the at least one RS. a first TCI state list from the one or more TCI state lists. The wireless devicemay replace, based on the selected TCI state list and the at least one RS, one or more TCI states of the plurality of second TCI states in response to receiving the confirmation command or the acknowledgement.

[0012] In some embodiments, a wireless device may receive, from a network controller, one or more radio resource control (RRC) messages comprising configmation parameters. The configuration parameters may indicate one or more reference signals (RSs) for beam measurements. The configuration parameters may indicate a plurality of first transmission configmation indicator (TCI) states. The configmation parameters may indicate a threshold value. The configuration parameters may indicate a first number. The configmation parameters may indicate an association between the one or more RSs and one or more TCI states of the plurality of first TCI states. The wireless device may receive, from the network controller, a MAC CE activating a plurality of second TCI states from the plurality of first TCI states. The wireless device may determine, based on an event evaluation, with the beam measurements of the one or more RSs. for an event, that a quality of at least one RS of the one or more RSs becomes the threshold value better than a first RS associated with a first TCI state with the first number-th best quality in the plurality of second TCI states. Such an event is called Event 7 throughout this application. The wireless device may transmit a beam measurement report indicating the at least one RS in response to the event being fulfilled. The wireless device may receive a confirmation command or an acknowledgement for the beam measurement report. The wireless device may replace, based on the association and the at least one RS. one or more TCI states of the plurality of second TCI states in response to receiving the confirmation command or the acknowledgement.

[0013] In some embodiments, a wireless device may receive, from a network controller, one or more radio resource control (RRC) messages comprising configuration parameters. The configuration parameters may indicate one or more reference signals (RSs) for beam measurements. The configuration parameters may indicate a plurality of first transmission configuration indicator (TCI) states. The configuration parameters may indicate a threshold value. The configuration parameters may indicate an association between the one or more RSs and one or more TCI states. The configuration parameters may indicate a timer. The wireless device may receive, from the network controller, a MAC CE activating a plurality of second TCI states from the plurality of first TCI states. The wireless device may receive, from the network controller, a downlink control information indicating a first TCI state from plurality of second TCI states. The wireless device may determine, based on an event evaluation, with the beam measurements of the one or more RSs. that Event 2 and / or Event 7 is fulfilled. The wireless device may transmit a beam measurement report indicating the at least one RS in response to Event 2 and / or Event 7 being fulfilled. The wireless device may start (or restart) the timer from the end of last symbol of the transmission of the beam measurement report. The wireless device may receive a confirmationcommand or an acknowledgement for the beam measurement report. The wireless device may activate, based on the association and the at least one RS, one or more TCI states without activation latency for the plurality of second TCI states in response to receiving the confirmation command or the acknowledgement and the timer being not expired.

[0014] In some embodiments, a wireless device may receive, from a network controller, one or more radio resource control (RRC) messages comprising configuration parameters. The configuration parameters may indicate one or more reference signals (RSs) for beam measurements. The configuration parameters may indicate a plurality of first transmission configuration indicator (TCI) states. The configuration parameters may indicate a threshold value. The configuration parameters may indicate an association between the one or more RSs and one or more TCI states. The wireless device may receive, from the netw ork controller, a MAC CE activating a plurality of second TCI states from the plurality of first TCI states. The wireless device may receive, from the network controller, a downlink control information indicating a first TCI state from plurality of second TCI states. The wireless device may determine, based on an event evaluation, with the beam measurements of the one or more RSs, that Event 2 and / or Event 7 is fulfilled. The wireless device may transmit a beam measurement report indicating the multiple RSs in response to Event 2 and / or Event 7 being fulfilled. The wireless device may receive a confirmation command or an acknowledgement, indicating at least one RS from the multiple RSs, for the beam measurement report. The w ireless device may replace, based on the association and the at least one RS. one or more TCI states of tire plurality of second TCI states in response to receiving the confirmation command or the acknowledgement.

[0015] According to a first aspect, a method performed by a user equipment (UE) comprises performing, by the UE with a network entity, a first communication with one or more signals based on a first transmission configuration indicator (TCI) state, wherein the first TCI state includes a first reference signal (RS) as a (QCL) source RS for the one or more signals. The UE reports to the network entity a measurement quality of a second RS, wherein the measurement quality of the second RS and a measurement quality of the first RS meet an event criterion. The UE then receives a control message from the network entity and applies, in response to receiving the control message, a second TCI state for the one or more signals, wherein the second TCI state comprises the second RS as a (QCL) source RS for the one or more signals. The UE then performs a second communication with the network entity based on the one or more signals with the second TCI state.

[0016] In a first possible embodiment of the first aspect, the UE applies, in response to receiving the control message, the second TCI state by including, by the UE, the second TCI state into a list of TCI states configured for the one or more signals.[ooi7] In a second possible embodiment of the first aspect, applying, by the UE in response to receiving the control message, the second TCI state further comprises configuring, by the UE, the second TCI state including the second RS as the (QCL) source RS for the one or more signals; or generating, by the the UE, the second TCI state including the second RS as the (QCL) source RS for the one or more signals.

[0018] In a third possible embodiment of the first aspect, applying, by the UE in response to receiving the control message, the second TCI state further comprises one or more of applying, by the UE, the second TCI state including the second RS as the (QCL) source RS for the one or more signals; and including, by the UE, the second TCI state into a list of TCI states activated for the one or more signals.

[0019] In a fourth possible embodiment of the first aspect, applying, by the UE in response to receiving the control message, a second TCI state further comprises switching, by the UE, from the first TCI state to the second TCI state, wherein the second TCI state includes the second RS as the (QCL) source RS for the one or more signals, the second TCI state is in a list of TCI states configured for the one or more signals, and the switching is within a time duration indicated by a parameter of time duration for quasi-co-location (QCL).

[0020] In a fifth possible embodiment of the first aspect, the control message is one of a medium access control control element (MAC CE), a downlink control information (DCI), a radio resource control (RRC) message, or an acknowledgment.

[0021] In a sixth possible embodiment of the first aspect, applying, by the UE in response to receiving the control message, a second TCI state further comprises including, by the UE, the second TCI state into a list of TCI states configured for the one or more signals, wherein the second TCI state is configured in a first association between the second RS and the second TCI state.

[0022] In a seventh possible embodiment of the first aspect, the UE receives from the network entity one or more configuration parameters indicating one or more RSs for beam measurements including the second RS; a plurality of first TCI states including the first TCI state; a threshold value; and a first association between the one or more RSs and one or more first TCI states. The UE receives a MAC CE activating a plurality of second TCI states from the plurality of first TCI states, where the plurality of second TCI states comprise the first TCI state. The UE further receives downlink control information (DCI) indicating the first TCI state from plurality of second TCI states; determines, based on an event evaluation, with the beam measurements of the one or more RSs, for an event, that a measurement quality of at least one RS of the one or more RSs including the second RS becomes the threshold value better than the first RS; and transmits, in response to the event being fulfilled, a beam measurement report indicating the atleast one RS including the second RS. The UE then receives a confirmation command or an acknowledgement for the beam measurement report in the control message; and replaces, in response to receiving the confirmation command or the acknowledgement, based on the first association and the at least one RS including the second RS, one or more second TCI states of the plurality of second TCI states by one or more third TCI states associated with the at least one RS.

[0023] In an eighth possible embodiment of the first aspect, the configuration parameters indicating the one or more RSs indicate a first RS set comprising the one or more RSs.

[0024] In a ninth possible embodiment of the first aspect, the configuration parameters indicating the one or more RSs indicate a plurality of RS sets comprising a second RS set comprising the one or more RSs.[OO25] In a tenth possible embodiment of the first aspect, the UE receives a second MAC CE activating the second RS set.

[0026] In an eleventh possible embodiment of the first aspect, the one or more RSs are quasi co-location (QCL) RSs of the one or more first TCI states.

[0027] In a twelfth possible embodiment of the first aspect, the threshold value is a physical layer reference signal received power (RSRP) value or a physical layer signal to interference and noise ratio (SINR) value.

[0028] In a thirteenth possible embodiment of the first aspect, the one or more RSs comprise at least one of one or more channel state information reference signals (CSI-RSs); one or more synchronization signal blocks (SSBs); or one or more demodulation reference signals (DMRSs).

[0029] In a fourteenth possible embodiment of the first aspect, the beam measurements comprise physical layer (LI) reference signal received power (RSRP) measurements or LI signal to interference and noise ratio (SINR) measurements of the one or more RSs.

[0030] In a fifteenth possible embodiment of the first aspect, the measurement quality of the at least one RS comprises an Ll-RSRP value or an Ll-SINR value of the at least one RS.

[0031] In a sixteenth possible embodiment of the first aspect, the event being fulfilled comprises that a value of a counter is equal to or greater than a second threshold value before a timer expires.

[0032] In a seventeenth possible embodiment of the first aspect, the counter of the sixteenth possible embodiment is incremented by one in response to determining that the measurement quality of the at least one RS of tire one or more RSs becomes at least the threshold value better than the first RS associated with the first TCI state.[00331 In an eighteenth possible embodiment of the first aspect, the configuration parameters indicate at least one of: the second threshold value, the counter, and the timer.

[0034] In a nineteenth possible embodiment of the first aspect, the beam measurement report is a physical layer (LI) beam measurement report.

[0035] In a twentieth possible embodiment of the first aspect, transmitting the beam measurement report comprises transmitting a first uplink signal via a first uplink channel and transmitting the beam measurement report via a second uplink channel.

[0036] In a twenty -first possible embodiment of the first aspect, the first uplink signal indicates one or more resources used for transmission of the beam measurement report via the second uplink channel.

[0037] In a tw enty -second possible embodiment of the first aspect, the confirmation command or the acknowledgement for the beam measurement report comprises at least one of: a physical downlink control channel (PDCCH) scrambled by a beam confirmation radio network temporary identifier (RNTI) (BC-RNTI); a new data indicator (NDI) included in an uplink grant carried by a PDCCH; a PDCCH within a first search space; a MAC CE; an ACK; or PDCCH carried by a search space being different from the first search space.

[0038] In a twenty -third possible embodiment of the first aspect, replacing, based on the first association and the at least one RS, one or more TCI states comprises deactivating the one or more TCI states and activating one or more second TCI states for the plurality of second TCI states.

[0039] In a twenty -fourth possible embodiment of the first aspect, the one or more secondTCI states are determined based on the first association and the at least one RS.

[0040] In a twenty -fifth possible embodiment of the first aspect, the one or more second TCI states are associated with the at least one RS.

[0041] In a twenty-sixth possible embodiment of the first aspect, the association between the one or more second TCI states and the at least one RS indicates that the at least one RS are quasi- co-location (QCL) RS(s) of the one or more second TCI states.

[0042] In a tw enty-seventh possible embodiment of the first aspect, the association betw een the one or more second TCI states and the at least one RS indicates that the at least one RS have a QCL relationship with QCL RS(s) of the one or more second TCI states.

[0043] In a twenty -eighth possible embodiment of the first aspect, a second downlink control information indicating a second TCI state from the one or more third TCI states is received.[00441 In a tw enty -ninth possible embodiment of the first aspect, a transport block based on the second TCI state is transmitted or received.

[0045] In a thirtieth possible embodiment of the first aspect, the first communication or the second communication is a transmission, a reception, or both.

[0046] In a thirty -first possible embodiment of the first aspect, the one or more signals are transmitted or received via one or more channels.

[0047] In a thirty -second possible embodiment of the first aspect, the control message comprises a plurality of messages.

[0048] In a thirt -third possible embodiment of the first aspect, the control message is a single message.

[0049] In a thirty -fourth possible embodiment of the first aspect, the source RS is a QCL source RS.

[0050] In a thirty -fifth possible embodiment of the first aspect, a user equipment (UE) comprises at least one processor and a non-transitory computer readable storage medium storing programming, the programming including instructions that, when executed by die at least one processor, cause the UE to perform any of the foregoing embodiments of the first aspect.

[0051] In a thirty -sixth possible embodiment of the first aspect, a non-transitory computer- readable medium contains instructions stored thereon that, when executed by a user equipment (UE), cause the UE to perform any of the foregoing embodiments of the first aspect.

[0052] According to a second possible aspect, a method is performed by a network entity, comprising transmitting, to a wireless device, one or more configuration parameters indicating one or more reference signals (RSs) for beam measurements; a plurality of first transmission configuration indicator (TCI) states; a threshold value; and an association between the one or more RSs and one or more first TCI states. The network entity further transmits a medium access control control element (MAC CE) activating a plurality of second TCI states from the plurality of first TCI states and a downlink control information indicating a first TCI state from plurality of second TCI states. The network entity receives, from the wireless device, a beam measurement report indicating at least one RS from the one or more RSs; transmits a confinnation command or an acknowledgement for the beam measurement report; and replaces, in response to transmitting the confirmation command or the acknowledgement and based on the association and the at least one RS. one or more second TCI states from the plurality of second TCI states with one or more third TCI states associated with the at least one RS.

[0053] In a first possible embodiment of the second aspect, the configuration parameters indicating the one or more RSs indicate a first RS set comprising the one or more RSs.[00541 In a second possible embodiment of the second aspect, the configuration parameters indicating the one or more RSs indicate a plurality of RS sets comprising a second RS set, the second RS set comprising the one or more RSs.

[0055] In a third possible embodiment of the second aspect, a second MAC CE activating the second RS set is transmitted.

[0056] In a fourth possible embodiment of the second aspect, the one or more RSs are quasi co-location RSs of the one or more first TCI states.

[0057] In a fifth possible embodiment of the second aspect, the threshold value is a physical layer (LI) reference signal received power (RSRP) value or an LI signal to interference and noise ratio (SINR) value.

[0058] In a sixth possible embodiment of the second aspect, the one or more RSs comprise at least one of one or more channel state information reference signals (CSI-RSs); one or more synchronization signal blocks (SSBs); or one or more demodulation reference signals (DMRSs).[OO59] In a seventh possible embodiment of the second aspect, the beam measurements comprise LI RSRP measurements or LI SINR measurements of the one or more RSs.

[0060] In an eighth possible embodiment of the second aspect, the configuration parameters indicate at least one of a second threshold value, a counter, and a timer.

[0061] In a ninth possible embodiment of the second aspect, the beam measurement report is an LI beam measurement report.

[0062] In a tenth possible embodiment of the second aspect, receiving the beam measurement report comprises receiving a first uplink signal via a first uplink channel and receiving the beam measurement report via a second uplink channel.

[0063] In an eleventh possible embodiment of the second aspect, the first uplink signal indicates one or more resources used for transmission of the beam measurement report via the second uplink channel.

[0064] In a twelfth possible embodiment of the second aspect, the confinnation command or the acknowledgement for the beam measurement report comprises at least one of: a physical downlink control channel (PDCCH) scrambled by a beam confirmation radio network temporary identifier (RNTI) (BC-RNTI); a new data indicator (NDI) included in an uplink grant carried by a PDCCH; a PDCCH within a first search space; a MAC CE; an acknowledgment (ACK); or PDCCH carried by a search space being different from the first search space.

[0065] In a thirteenth possible embodiment of the second aspect, replacing, based on the association and the at least one RS. one or more TCI states comprises deactivating the one ormore TCI states and activating one or more second TCI states for the plurality of second TCI states.

[0066] In a fourteenth possible embodiment of the second aspect, the one or more second TCI states are determined based on the association and the at least one RS.

[0067] In a fifteenth possible embodiment of the second aspect, the one or more second TCI states are associated with the at least one RS.

[0068] In a sixteenth possible embodiment of the second aspect, the association between the one or more second TCI states and the at least one RS indicates that the at least one RS are quasi- co-location (QCL) RS(s) of the one or more second TCI states.

[0069] In an eighteenth possible embodiment of the second aspect, the association betw een the one or more second TCI states and the at least one RS indicates that the at least one RS have a QCL relationship with QCL RS(s) of the one or more second TCI states.

[0070] In a nineteenth possible embodiment of the second aspect, a second downlink control information indicating a second TCI state from the one or more third TCI states is transmitted.

[0071] In a twentieth possible embodiment of the second aspect, a transport block based on the second TCI state is received or transmitted.

[0072] In a twenty -first possible embodiment of the second aspect, the wireless device is a user equipment.

[0073] In a tw enty -second possible embodiment of the second aspect, the confirmation command or acknowledgement for the beam measurement report comprises a plurality of messages.

[0074] In a twenty -third possible embodiment of the second aspect, the confirmation command or acknowledgment for the beam measurement report comprises a single message.[OO75] According to a third possible aspect, a network entity' performs with a user equipment (UE) a first communication based on one or more signals with a first transmission configuration indicator (TCI) state, wherein tl e first TCI state comprises a first reference signal (RS) as a (QCL) source RS for the one or more signals. The network entity receives from the UE a measurement quality of a second RS, wherein the measurement quality of the second RS and a measurement quality of the first RS meet an event criterion. The netw ork entity then transmits a control message to the UE, and performs with the UE a second communication with the one or more signals with a second TCI state, wherein the second TCI state comprises the second RS.

[0076] In a first possible embodiment of the third aspect, the control message is one of a medium access control control element (MAC CE), a downlink control information (DCI), or a radio resource control (RRC) message.

[0077] In a second possible embodiment of the third aspect, one or more configuration parameters are transmitted to the UE, indicating: one or more reference signals (RSs) for beam measurements; a plurality of first TCI states, wherein the plurality of first TCI states include the first TCI state; a threshold value; and an association between the one or more RSs and one or more of the plurality of first TCI states.

[0078] In a third possible embodiment of the third aspect, the configuration parameters indicating the one or more RSs indicate a first RS set comprising the one or more RSs.[OO79] In a fourth possible embodiment of the third aspect, the configuration parameters indicating the one or more RSs indicate a plurality of RS sets comprising a second RS set, the second RS set comprising the one or more RSs.

[0080] In a fifth possible embodiment of the third aspect, a second MAC CE activating the second RS set is transmitted.

[0081] In a sixth possible embodiment of the third aspect, the one or more RSs are quasi colocation RSs of the one or more of the plurality of first TCI states.

[0082] In a seventh possible embodiment of the third aspect, the threshold value is a physical layer (LI) reference signal received power (RSRP) value or an LI signal to interference and noise ratio (SINR) value.[OO83] In an eighth possible embodiment of the third aspect, the one or more RSs comprise at least one of: one or more channel state information reference signals (CSI-RSs); one or more synchronization signal blocks (SSBs); or one or more demodulation reference signals (DMRSs).

[0084] In a ninth possible embodiment of the third aspect, the configuration parameters indicate at least one of a second threshold value, a counter, and a timer.

[0085] In a tenth possible embodiment of the third aspect, the measurement quality of the first RS or the measurement quality of the second RS comprise LI RSRP measurements or LI SINR measurements of the one or more RSs.

[0086] In an eleventh possible embodiment of the third aspect, the measurement quality of the first RS or the measurement quality of the second RS is an LI beam measurement report.[OO87] In a twelfth possible embodiment of the third aspect, receiving the measurement quality of the first RS or the measurement quality of the second RS comprises receiving a firstuplink signal via a first uplink channel and receiving the measurement quality of the first RS or the measurement quality of the second RS via a second uplink channel.

[0088] In a thirteenth possible embodiment of the third aspect, the first uplink signal indicates one or more resources used for transmission of the measurement quality of the first RS or the measurement quality of the second RS via the second uplink channel.[OO89] In a fourteenth possible embodiment of the third aspect, the control message comprises at least one of: a physical downlink control channel (PDCCH) scrambled by a beam confirmation radio network temporary identifier (RNTI) (BC-RNTI); a new data indicator (NDI) included in an uplink grant carried by a PDCCH; a PDCCH within a first search space; a MAC CE; an acknowledgment (ACK); or PDCCH carried by a search space being different from the first search space.

[0090] In a fifteenth possible embodiment of the third aspect, performing, in response to transmitting the control message, a second communication with the one or more signals according to a second TCI state comprises deactivating the first TCI state and activating the second TCI state.

[0091] In a sixteenth possible embodiment of the third aspect, the second TCI state is determined based on the second RS.

[0092] In a seventeenth possible embodiment of the third aspect, the second TCI state is associated with at least one RS.

[0093] In an eighteenth possible embodiment of the third aspect, the association betw een the second TCI state and the at least one RS indicates that the at least one RS are quasi-co-location (QCL) RS(s) of the second TCI state.[00941 In a nineteenth possible embodiment of the third aspect, the association between the second TCI state and the at least one RS indicates that the at least one RS have a QCL relationship with QCL RS(s) of the second TCI state.

[0095] In a twentieth possible embodiment of the third aspect, a second downlink control information indicating the second TCI state from one or more third TCI states is transmitted.

[0096] In a tw enty -first possible embodiment of the third aspect, a transport block based on the second TCI state is transmitted or received.[OO97] In a twenty-second possible embodiment of the third aspect, the first communication or the second communication is a transmission, a reception, or both.[OO98] In a tw enty -third possible embodiment of the third aspect, the one or more signals are transmitted or received via one or more channels.[00991 In a twenty -fourth possible embodiment of the third aspect, the control message comprises a plurality of messages.[OlOO] In a twenty -fifth possible embodiment of the third aspect, the control message comprises a single message.[O1O1] In a twenty-sixth possible embodiment of the third aspect, the source RS is a QCL source RS.

[0102] In a possible embodiment of the second or third aspects, a network controller comprises at least one processor; and a non-transitory computer readable storage medium storing programming, the programming including instructions that, when executed by die at least one processor, cause the network controller to perform any of the embodiments of the second or third aspects.

[0103] In another possible embodiment of the second or third aspects, a non-transitory computer-readable medium has instructions stored thereon that, when executed by a network controller, cause the netw ork controller to perform any of die embodiments of the second or third aspects.BRIEF DESCRIPTION OF THE DRAWINGS

[0104] For a more complete understanding of the present disclosure, and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which:

[0105] FIG. 1 illustrates a diagram of a legacy procedure of beam management based on an event triggered report.

[0106] FIG. 2 illustrates a TCI state pool that includes an activated TCI state list and indicates a TCI state associated with a current beam or reference signal, according to various embodiments.

[0107] FIG. 3 illustrates a list of configured reference signals or beams, according to various embodiments.

[0108] FIG. 4 illustrates an updated list of TCI states, according to various embodiments.

[0109] FIG. 5 is a flowchart of an example embodiments for the configuration, activation, indication, and utilization of one or more beams, for a signal or channel.[Olio] FIG. 6 illustrates an example embodiment for updating beams based on UE initiated beam management with an event triggered at the UE side.[Olli] FIG. 7 illustrates another example embodiment for updating beams based on UE initiated beam management with an event triggered at the UE side.

[0112] FIG. 8 illustrates a diagram of an example embodiment for a procedure of beam management based on an event triggered report.

[0113] FIG. 9 illustrates a diagram of an example embodiment for procedures and definitions of different events.

[0114] FIG. 10 illustrates a diagram of an example embodiment for a procedure of beam management based on an event triggered report.

[0115] FIG. 11 illustrates a diagram of another example embodiment for a procedure of beam management based on an event triggered report.

[0116] FIG. 12A illustrates a diagram of another example embodiment for a procedure of beam management based on an event triggered report.

[0117] FIG. 12B illustrates a diagram of another example embodiment for a procedure of beam management based on an event triggered report.

[0118] FIG. 12C illustrates a diagram of an example embodiment for a format of an event triggered report.

[0119] FIG. 12D illustrates a diagram of another example embodiment for a format of an event triggered report.

[0120] FIG. 12E illustrates a diagram of an example embodiment for a procedure of beam management based on an event triggered report.

[0121] FIG. 12F illustrates a diagram of a second example embodiment for a procedure of beam management based on an event triggered report.

[0122] FIG. 13 illustrates an example communications system in which some embodiments may be implemented.

[0123] FIG. 14 illustrates a diagram of an example communications system in which embodiments described herein may be implemented.

[0124] FIGS. 15A and 15B illustrate example devices that may implement some embodiments described herein.

[0125] FIG. 16 illustrates a diagram of a computing system that may be used for implementing some embodiments disclosed herein.DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

[0126] The following example embodiments in disclosure can be combined or split to generate one or more new embodiments. All the procedures, elements, terms, behaviors, and / or the like described in an embodiment can be applied to (or combined with) one or more other embodiments to become one or more new embodiments. Further, when the phrase “one or more” of something is used, this is meant to also describe the possibility of “only one” of the something.

[0127] FIG. 1 illustrates a diagram of a legacy procedure for beam management based on an event triggered report. A wireless device (e.g., user equipment or UE) may receive one or more radio resource control (RRC) messages from a base station (BS) (e.g., gNB or network controller). The one or more RRC messages may comprise one or more configuration parameters indicating: one or more first (1st) reference signals (RSs)Zbeams; and / or one or more second (2nd) RSs / TCI states / beams. A beam may be referred to as an RS or a TCI state. The wireless device (e.g., UE) may receive at time TO the one or more 1streference signals (RSs) / beams, and / or the one or more 2ndRSs / beams from the base station (BS). Each RS of the one or more 1stor 2ndRSs may be referred to as a beam. The one or more 1stRSs or the one or more 2ndRSs may comprise: one or more chaimel state information RSs (CSI-RSs); and / or one or more synchronization signal blocks (SSBs). The wireless device may perform beam measurements based on the one or more 1stRSs and / or the one or more 2ndRSs. The one or more 1stRSs may comprise one or more new (candidate) beams. In an example, the one or more 2ndRSs may be referred to as (or may comprise) one or more current beams. The current beam may be referred to as a quasi-co-location (QCL) RS of an indicated TCI state. The indicated TCI state may be a TCI state currently used by the wireless device for an uplink transmission and / or a downlink reception. The beam measurement may comprise physical layer (LI) measurement(s). The wireless device may perform the LI measurement(s) based on the one or more 1stRSs and / or the one or more 2ndRSs.

[0128] The physical layer (LI) measurement(s) may comprise a LI reference signal received power (Ll-RSRP) measurement, and / or a LI signal-to-interference-plus-noise ratio (Ll-SINR) measurement. The wireless device may perform event detection or event evaluation based on the beam measurements. In response to the event being detected / triggered by the wireless device (e.g., certain conditions being fulfilled), the wireless device may transmit at time T1 a LI beam measurement report to the base station. In an example, the event may mean (or indicate) that one or more new (candidate) beams (or new TCI states) (e.g., the 1stRSs), with better beam quality than a currently used beam or an active TCI state (e.g., the 2ndRSs). are detected by the wireless device. The beam measurement report may include the beam measurement results / values performed by the wireless device. The LI beam measurement report may comprise at least one of: one or more L 1 -RSRP values / Ll -SINR values for the one or more RSs; one or more RS indexes / resources corresponding to the one or more Ll-RSRP values / Ll -SINR values; one or more identifiers (or indexes) of the one or more new (candidate) beams (or the new TCI states); orone or more Ll-RSRP values / Ll-SINR values of the one or more new (candidate) beams (or the new TCI states).

[0129] In the example of FIG. 1, the base station may determine that the one or more new (candidate) beams (or new TCI states) indicated by the LI beam measurement report is not in the configured TCI state pool, which comprises the TCI states of the one or more 2ndRSs / beams. The base station may transmit at time T2 one or more radio resource control (RRC) reconfiguration messages to the wireless device. The one or more RRC reconfigmation messages may comprise configuration parameters indicating an update for the configmed TCI state pool based on new (candidate) beams (or new TCI states) indicated by the LI beam measurement report, which may result in a latency of about 10ms or even more. In an example, the one or more new (candidate) beams (or new TCI states) may be not in the active TCI state list for physical downlink shared channel (PDSCH). The base station may transmit at time T3, to the wireless device, a TCI state activation command activating the one or more new (candidate) beams (or new TCI states). In an example, the TCI state activation command may be a medium access control control element (MAC CE). The MAC CE may activate one or more TCI states of the TCI state pool configured / indicated by the RRC reconfiguration message. The one or more TCI states may be associated with or may comprise the one or more new (candidate) beams (or new TCI states). The wireless device may transmit at time T4 acknowledgement (ACK) to the base station in response to receiving the MAC CE for activation of the one or more TCI states.

[0130] In the example of FIG. 1, the wireless device may perform a synchronization procedure (e.g., frequency synchronization and / or timing synchronization) based on RS(s) associated with the one or more new (candidate) beams (or new TCI states). Additional latency due to waiting for the first (1st) SSB transmission (e.g.. at time T5 for synchronization procedure) after the MAC CE (e.g., TCI state activation or deactivation command) may be needed for the wireless device. The additional latency may depend on the periodicity period of the SSB transmission with a typical value of 20ms or even more, which significantly prolongs the beam application time for the wireless device. After that, the wireless device may apply the one or more new (candidate) beams (or new TCI states). For example, the wireless device may activate the one or more new (candidate) beams (or new TCI states) for uplink transmission and / or downlink reception, e.g., during time from T5 to T6. In an example, the wireless device may receive a downlink control information (DCI) from the base station. The DCI may indicate a beam from the one or more new (candidate) beams (or new TCI states). The wireless device may perform, based on the beam indicated by the DCI. the uplink transmission and / or downlink reception via downlink / uplink signal(s) / channels. For example, the wireless device may switch / update a beam to the beam indicated by the DCI for uplink transmission and / or downlink reception during time from T5 to T6.

[0131] In existing technologies, such as the example discussed above, after UE- initiated / event-driven or triggered beam reporting, the UE (or wireless device) may still perform the existing beam management procedure to apply the one or more new (candidate) beams (or new TCI states), such as receiving RRC reconfiguration, MAC CE activation, and / or DCI indication, etc., which significantly prolongs the beam application time of the UE after the UE- initiated / e vent-driven or triggered beam reporting. However, if the base station can directly confinn / acknowledge the reported beam(s) (e.g., the one or more new (candidate) beams (or new TCI states)) indicated by UE-initiated / event-driven or triggered beam reporting, a significant latency and signaling overhead reduction on the second part can be obtained by the wireless device via UE-initiated / event-driven or triggered beam reporting. That is. the wireless device can immediately apply the reported beam(s) (e.g., the one or more new (candidate) beams (or new TCI states)), indicated by the UE-initiated / event-driven or triggered beam reporting, after confirmation / acknowledgement by base station.

[0132] Thus, the existing beam management procedure for beam application, such as RRC reconfiguration, MAC CE activation, etc., as depicted in FIG. 1 can be replaced with just a confirmation / acknowledgement message from the base station after the event triggered beam reporting, which can significantly reduce latency and signaling overhead for beam application by the wireless device after the UE-initiated / event-driven or triggered beam reporting, while also facilitating fast beam (or TCI state) switching, beam (or TCI state) update, and / or beam (or TCI state) activation by the wireless device. On the other hand, if the base station and the wireless device perform a legacy beam application procedure after receiving beam (measurement) reporting with the reported beam(s), such as transmitting RRC reconfiguration message, MAC CE activation and / or DCI indication for the beam(s) reported in UE-initiated / event-driven or triggered beam reporting, it may result in both higher signaling overhead and larger latency.

[0133] One possible enhancement is to use direct confirmation / acknowledgement from the base station for the reported beam(s) (e.g., the one or more new (candidate) beams (or new TCI states)) indicated by the UE-initiated / event-driven or triggered beam (measurement) reporting. However, if direct confirmation / acknowledgement from the base station for the reported beam(s) is used to replace the corresponding RRC reconfiguration message (e.g., for configured TCI state pool / list update) and / or MAC CE activation command (e.g., for activated TCI state list / pool update), the configured TCI state pool / list and activated TCI state list / pool still need to be updated and maintained for further beam indication by the base station. Therefore, from both signaling overhead and latency reduction perspective, there is a need to enhance the existing beam application procedure (e.g., beam switching, beam update and / or beam activation) while achieving the update and / or maintenance functionality for the configured TCI state pool / list and / or activated TCI state list / pool.

[0134] Insome embodiments illustrated by FIG. 2, FIG. 3, FIG. 4, FIG. 5, FIG. 6 and FIG. 7 and described by corresponding descriptions, beam management based on an event triggered report does not require all RSs / beams configured for beam measurements to be also configured or associated with a TCI state. In some embodiments illustrated by FIG. 8 to FIG. 12F and described by corresponding descriptions, beam management based on an event triggered report requires the RSs / beams configured for beam measurements to be also configured or associated with at least a TCI state.[01351 The illustrations in FIG. 2, FIG. 3, and FIG. 4 provide a high-level description of some preferred embodiments for UE initiated beam management with event triggering at the UE side, and with reduced latency.

[0136] Though some or most of the embodiments described below are for the transmissions of a signal / channel, they may be equally applicable to one or more signals / channels associated with the same physical cell ID (PCI or PCID). For example, before the beam switching, the old, existing, or current beam can be used for one or more first transmissions of some or all of the one or more signals / channels associated with the same PCID. after the beam switching, the new beam can be used for one or more second transmissions of some or all of the one or more signals / channels. By way of illustration, before the switch, channel 1 is transmitted with the old beam, and after the switch, channel 2 is transmitted with the new beam. Alternatively, before the switch, channel 1 is transmitted with the old beam, and after the switch, the same channel 1 is transmitted with the new beam, etc. The descriptions are mainly based on a same signal / channel before and after the switch, but the embodiments can be applied to cases where a different signal / channel, or both, or more than one signals / channels, etc., are transmitted before and after the switch.[01371 In FIG. 2, the TCI states for a signal / channel are shown. The signal / channel is configured with a list of TCI states via RRC signaling, which may be called the Configured TCI State Pool 202 for the signal / channel. Each small solid line circle represents a configured TCI state. Within the Configured TCI State pool 202, some TCI states are activated, by MAC CE or by RRC signaling via default configuration but managed by the MAC layer. The list of the activated TCI states is called the Activated TCI State List 204. Then, within the Activated TCI State List 204, there can be one (or in case of multiple TRPs, multiple) TCI state(s) used for the current transmission of the signal / channel, which may be called the Indicated TCI State 206. The Indicated TCI State 206 may be indicated via physical layer DCI, or via default configuration by RRC signaling, or via default configuration by MAC CE, or determined by uniqueness (e.g., there is only 1 TCI state in the configured pool 202 or in the activated list 204). but it is generally managed by the physical layer. A TCI state may be generally referred to as a beam for the signal / channel. Therefore, the Indicated TCI State 206 may be referred to as the current beam.The current beam, that is, the Indicated TCI State 206, is shown as a small circle within the Activated TCI state list 204.

[0138] FIG. 3 illustrates a list of configured RSs 302, which may also be called beams or sometimes simply RSs. However, a configured RS is not a beam for the signal / channel until it is configured as a (QCL) source RS in a TCI state for the signal / channel. Some or all of the RSs may be configmed for measurement. It is possible that some or all of the RSs configured for measurement are not configured as (QCL) source RS of any TCI state or not associated with any TCI state in the pool. Within the RSs configured for measurement, some of their measurement results may be reported 304 by the UE to the network. The report may be triggered by some events or may be configmed as periodic / semi-persistent reporting. Within the reported beams, there may be one or more beams 306 satisfying the event condition, and one of them, beam 308, is the best beam (such as with the best Ll-RSRP).[01391 FIG. 4 illustrates the updated lists of TCI states. After the netw ork receives the report, it sends signaling to the UE to update the TCI states. Detailed embodiments will be described further. For example, the Configured TCI State Pool 402 for the signal / channel may be updated to include all the TCI states associated with the beams meeting the event condition. In addition, tire Activated TCI State List 404 may be updated to include the TCI state associated w ith the reported best beam. Furthermore, the current beam may be updated to be the TCI state associated with the reported best beam; that is, the reported best beam may replace the previously current beam as the new current beam 406.

[0140] The flowchart in FIG. 5 provides example embodiments of configuration, activation, indication, and utilization of beam(s), for a signal / channel.

[0141] - Step 501: Network NW transmits signaling for RRC configuration of a set of CSI resource configurations (RSs / beams) for measurements.

[0142] - In some embodiments, the network NW, such as via a network entity, transmits information about a list of CSI resource configurations to the UE via RRC signaling. The signaling includes a csi-ResourceConfigToAddModList. which may contain multiple CSI- ResourceConfig entries. Each CSI-ResourceConfig corresponds to a RS, such as a CSI-RS or SSB. More precisely, each CSI-ResourceConfig is for a RS resource configuration or RS resource setting, which may include one or more RS resource sets, and each RS resource set may include one or more RS resources. Each RS resource includes a RS on one or more RS ports.

[0143] — In some embodiments, for uplink (UL) operations, the network NW configures anSRS-Config that includes a list of sounding reference signal (SRS) resource sets and SRS resources. A SRS resource may be configured with one or more SRS ports. Each SRS resource corresponds to an SRS for UL sounding, allowing the network NW to determine UL channelquality based on measurements from the UE, and in the case of TDD, also downlink (DL) channel quality. The UE transmits the configured SRS resources for sounding across specific BWPs or carriers.

[0144] — In some embodiments, RSs and beams are further configmed for measurement by the UE and to report measurement data back to the netw ork NW via CSI reporting mechanisms, as defined by the CSI-ReportConfig. This allows the netw ork NW to adjust its transmissions based on the reported measurement results.

[0145] - For a RS configuration that may be used for beam management purposes, generally only 1 port is configured. For convenience, the CSI-RS or SSB or SRS, configmed in CSI resource configuration or SRS configuration, may be simply referred to as a beam or a RS.

[0146] - Step 502: Network NW transmits signaling for RRC configuration of a ConfiguredTCI State Pool, based on a subset of RSs / beams, for a signal / channel.[01471 — In some embodiments, die network NW transmits configmation information for a list of TCI states for a signal or channel to the UE via RRC signaling. The signals or channels could include physical downlink shared channel(s) (PDSCH), physical uplink shared channel(s) (PUSCH). physical downlink control channel(s) (PDCCH) (configured through the Coreset associated with the PDCCH). physical random access channel(s) (PRACH). CSI-RS (for DL CSI measurements, for example), SRS (for UL and / or DL CSI acquisition, for example), etc. The signaling provides a list of TCI states via a tci-StatesToAddModList, dl-OrJoinfTCI-StateList, or ul-TCI-StateList. Such a list includes entries of TCI-State or TCI-UL-State. For different signals or channels, there could be different TCI state lists.

[0148] — Each TCI state is associated with at least one quasi co-located (QCL) source RS that provides QCL Type D information, pathloss reference information, spatial relationship information, etc., between the RS configmed for beam management / measmement and the signal or channel. In some embodiments, the QCL somce RS for beam management / measurement is an RS or beam that was configured earlier for measmement, in Step 1. The QCL source RS enables the UE to apply beamforming (spatial transmission (Tx) parameters and / or spatial reception (Rx) parameters) to optimize signal transmission or reception. Each TCI state provides beam information for the signal or channel, allowing the UE to align the signal / channel with the spatial information from the QCL source RS. Therefore, sometimes a TCI state is also referred to as a beam for the signal / channel. Note that the QCL source RS in the TCI state may be also referred to as a beam for the signal / channel. When describing a beam, whether it means a TCI state, a RS, or either / both is generally clear from the context, unless otherwise specified. There may be another QCL somce RS in the TCI state for deriving other channel properties, such as QCL Type A, B. orC. Here, the focus is the QCL source RS using for beam management / measurement. The signal / channel configured with the TCI state(s) may be called the target signal / channel.

[0149] — Each TCI state is assigned a unique TCI State ID. In some embodiments, the list ofTCI states configured for a signal or channel is referred to as the Configured TCI State Pool for the signal or channel. Not all beams in the pool are used for the signal / channel transmission, though all beams in the pool may be configured for measurements. The pool allows the UE to maintain multiple TCI states (beams) for fast beam selection and switching based on channel conditions or netw ork NW commands. When the pool needs to be updated, generally RRC configuration signaling is used, unless otherwise specified.

[0150] - Step 503: Network NW transmits signaling for MAC CE based activation of anActivated TCI State List (selected from the Configured TCI State Pool).

[0151] - In some embodiments, the UE is configured with and maintains a Configured TCIState Pool containing the TCI states for a specific signal or channel, following Step 502. Then the network NW may command the UE to select some of these TCI states from the pool based on the current beamforming requirements or channel conditions. The selection and the maintenance of the selection may be generally determined by the MAC layer, unless the RRC signaling in Step 502 has already configured default TCI state(s) for activation. When the MAC layer makes a decision on the selection, the network NW sends a MAC CE to activate a subset of TCI states from the pool for the signal / channel. The subset of TCI states may be referred to as the activated TCI states. The MAC CE may also deactivate some TCI states.

[0152] - The collection of activated TCI states for the signal / channel may be called theActivated TCI State List for the signal / channel. Since the Activated TCI State List is selected from the Configured TCI State Pool, its size is no larger, and generally smaller than the Configured TCI State Pool. For an activated TCI state, the UE may need to maintain some parameters, e.g., synchronization parameters, spatial Tx / Rx parameters, etc., so that if the beam is to be applied, the application can be done relatively quickly. However, to maintain these parameters for a large number of beams can lead to high overhead / complexity. and not all beams have sufficient good quality to be applied for a transmission. Thus, having the Activated TCI State List smaller than the Configured TCI State Pool is beneficial to help reduce overhead / complexity while providing sufficient flexibility. Each TCI state in the Activated TCI State List may be assigned with an ID, for example, if the list has at most 8 TCI states, an entry is uniquely assigned with an ID of 0~7.

[0153] - In some embodiments, for some signals / channels, one or more default beams (TCI states) may be configured via RRC, and the default beams form the list without explicit MAC CEsignaling. When there is only one TCI state configured for a signal / channel, the above procedure can be further simplified.

[0154] - Step 504: Network NW indicates, e.g., via DCI indication, an Indicated TCI State from the Activated TCI State List.

[0155] - In some embodiments, the system supports indication and dynamic switching ofTCI states (beams) for UL and DL operations, where the indication and switching are from the beams in the Activated TCI State List. The indication may be generally done via DCI indication. For example, a DL TCI state of beam 1 that corresponds to a DL transmission and reception beam pair in the Activated TCI State List may be indicated as the Indicated TCI State, and the associated beam is to be applied and used for subsequent transmissions of the signal / channel.

[0156] - In some embodiments, the network NW sends a DCI to indicate a beam for the signal / channel, selected from the Activated TCI State List. The DCI may be a DCI format 1 1.1 2, etc., and includes a field of Transmission Configuration Indication (TCI), if configured. For example, for DCI format 1 1, a 3-bit TCI field may be configured, each of the 8 codepoints corresponding to one of the 8 TCI states in the Activated TCI State List. The network NW may send a DCI indicating the 4thTCI state in the list is selected to be applied and used for transmission. The indicated TCI state will be called the current beam when applied. If another TCI state was already applied, then the indicated TCI state will replace the already applied TCI state as the new current beam. That is. the system may dynamically adjust the current beam in response to changing network conditions, user movement, etc., maintaining optimal transmission quality.

[0157] - In some embodiments, for some signals / channels, a default beam may be configured via RRC. and the default beam will be used as the current beam without explicit DCI signaling. In an embodiment of single-TRP transmission with the UE, for a signal / channel, there is only one indicated TCI state or current beam. In an embodiment of multi-TRP transmission (of n TRPs) with the UE. for a signal / channel. there can be at most n indicated TCI states or current beams. If the Configured TCI State Pool has only n beams, then they are activated by default and they are applied as current beams, without explicit MAC CE or DCI signaling. These current beams may still be called Indicated TCI States even without explicit DCI indication.

[0158] - Step 505: Network NW and UE apply the current beam, e.g. the Indicated TCIState.

[0159] — At the UE side, to apply the Indicated TCI State so that the corresponding TCI state can be used in subsequent transmissions for the signal / channel. there can be an application delay (which may be called a TCI state switch delay). The UE is able to transmit / receive the signal / channel with the Indicated TCI State at the first slot that is after slotn+timeDurationForQCL, where timeDurationForQCL is the time required by the UE to perform PDCCH reception and applying spatial QCL information received in DCI for the signal / chaimel, and the value of timeDurationForQCL may be defined in a standard and can be associated with a UE capability reporting.

[0160] - Step 506: Network NW and UE perform signal / channel transmission using the current beam.

[0161] In FIG. 6, further embodiments are provided for updating beams based on UE initiated beam management with event triggered at the UE side. These embodiments detail the processes and variations involved in transitioning from one beam to another between the network and UE, for a specific signal or channel.

[0162] - Step 601: Network NW and User Equipment UE perform transmission / reception(communication)using the current (existing) beam.

[0163] — Similar to the embodiments discussed above with respect to FIG. 5, the networkNW and the UE perform signal or channel transmission utilizing the current beam, referred to herein as beam 1. Beam 1 is maintained as the active transmission configuration until an event necessitates an update.

[0164] The system continuously monitors the performance and quality metrics associated with beam 1 to determine the need for a beam update.

[0165] - Step 602: Network Sends to UE the RSs / beams per Beam MeasurementConfiguration

[0166] - The network transmits signaling for CSI resource configurations or SRS configurations to the UE, similar to some embodiments of Step 501 in Figure 5. This may be done before or during the transmission using the current beam, may be performed once or multiple times, and / or may be used to update a previously configured list. These RS configurations are designated for performing measurements necessary for beam evaluation.

[0167] - The network transmits RSs / beams per the CSI resource configurations or SRS configurations for the signal / channel. This step may be done before or during the transmission which uses the current beam, or may be performed once or multiple times.

[0168] — Correspondingly, the UE performs reception of the RSs / beams.

[0169] - Step 603 (comprising 603a and 603b): The UE performs beam measurements 603a and event evaluation 603b.

[0170] — The UE performs measurements on the received RS as configured by the network.For example, Ll-RSRP measurement may be configured for a beam 2. The current beam, i.e., beam 1 is also periodically received and measured.

[0171] — The UE then analyzes the measurement results of the beams. The UE may determine if specific events, indicative of the need to update the current beam, have occurred based on predefined event configurations. For instance, if Event 2 criteria are satisfied, such as beam 2 achieving a Ll-RSRP measurement a threshold better to beam 1, then the UE may identify the need to transition to beam 2, subject to NW confinnation after the UE reports the measurement results.

[0172] — In some embodiments, multiple beams may satisfy’ the event criteria. In some embodiments, multiple event types, e.g.. Event 2, Event 7, Event 1, etc., may occur for one or more beams. For purposes of this embodiment, beam 2 is assumed to be the best beam for subsequent discussions.

[0173] - Step 604: The UE reports to Network NW the measurement results and events

[0174] — The UE transmits a report to the network NW regarding the measurement outcomes and the occurrence of identified event(s). There can be measurement results such as Ll-RSRP for one or multiple beams included, and there can be one or more beams with one or more event types reported. The current beam’s measurement results may also be included.

[0175] — In some embodiments, the reporting may be periodic reporting, semi-persistent reporting, adaptive reporting frequencies based on network policies, or event-triggered reporting. The event-triggered reporting provides the most flexibility and shortens the latency.

[0176] - Step 605 (comprising 605a and 605b): Network NW sends RRC signaling to UE on updating the Configured TCI State Pool (e.g., adding beam 2).

[0177] - In some embodiments, the NW decides that the best beam. i.e.. beam 2. is to be associated with a TCI state, if beam 2 is not already configured as a (QCL) source RS in a TCI state for the signal or channel. In this case, upon receiving the report, the network may send 605a RRC configuration signaling to the UE, which configures a new TCI state for the signal or channel to use beam 2. The details are similar to some embodiments of Step 502 in FIG. 5, e.g.. the QCL-Info of the signal / channel may include beam 2 as a (QCL) source RS, enabling the signal or channel to be QCLed Type D with the RS of beam 2, or the RS of beam 2 as the PL RS / spatial relation reference for the signal / channel.

[0178] - In some embodiments, similar TCI state configurations may be configured to other beams reported by the UE. such as other beams reported as meeting an event condition. These multiple beam configurations may be sent in a single signaling message or in multiple messages.[01791 — In some embodiments, the newly configured TCI state for the signal / channel is included / updated 605b to the Configured TCI State Pool for the signal / channel via transmitting a RRC signaling with tci-StatesToAddModList, dl-OrJoinfTCI-StateList, or ul-TCI-StateList, which includes an information element to configure the TCI state.

[0180] — In some embodiments, RRC may also send configuration signaling to remove / release some configured TCI states from the existing Configured TCI State Pool, e.g., when including the newly configured TCI states may lead to more configured TCI states than allowed, so that a maximum of the configured TCI states is maintained.

[0181] - In some embodiments, beam 2 (or other beams) is / are already in the ConfiguredTCI State Pool for the signal / channel, and step 605b may be skipped.

[0182] - Step 606: Network NW signaling to UE MAC CE on updating the Activated TCIState List (adding beam 2)

[0183] — In some embodiments, the NW decides that the best beam, i.e., beam 2, is to be added to the Activated TCI State List, if beam 2 is not already activated as an activated TCI state for the signal or channel. The network transmits a MAC CE to the UE to activate the TCI state associated with beam 2 via its associated TCI state IDs.

[0184] — In some embodiments, some other reported beams satisfying an event condition and associated with TCI states may also be activated via MAC CE, if not yet present in the Activated TCI State List.

[0185] — In some embodiments, MAC CE may deactivate some activated TCI states in the existing Activated TCI State List, e g., when including the newly activated TCI states may lead to more activated TCI states than allowed, so that a maximum (e.g., 8) of the activated TCI states is maintained.

[0186] - In some embodiments, beam 2 (or other beams) is already in the Activated TCIState List for the signal / channel, and this step may be skipped.

[0187] - Step 607: Network NW indicates a new beam

[0188] — In some embodiments, the network NW sends DCI to the UE, indicating beam 2(or another beam selected from the Activated TCI State List) for transmissions of the signal or channel. This step is similar to Step 504 embodiments for FIG. 5. The indicated TCI state will become the new current beam upon application by both the network and the UE.

[0189] - Step 608: Network and UE apply the current beam (the Indicated TCI State)

[0190] - Both the network and the UE apply the newly indicated TCI state, e.g., designating beam 2 as the new current beam. The application delay described above may still apply.

[0191] - Step 609: Network and UE perform signal / cliannel transmission using the current beam.

[0192] In FIG. 7, further embodiments are provided for updating beams based on UE initiated beam management with an event triggered at the UE side. These embodiments detail the processes and variations involved in transitioning from one beam to another between the network NW and UE, with much reduced beam configuration and switching latency.

[0193] - Step 701 : Network NW and user equipment UE perform transmission using a current (existing) beam

[0194] - Step 702: Network NW sends to UE the RSs / beams per a Beam MeasurementConfiguration

[0195] - Step 703: UE performs beam measurements and event evaluation

[0196] - Step 704: UE reports to Network NW the measurement results and event evaluations[01971 - The above steps 701-704 are similar to embodiments for FIG. 6. and the reader is directed to the foregoing description of FIG. 6. Further details will not be repeated here.

[0198] - Step 705: Network NW sends confinnation signaling

[0199] — In some embodiments, the network NW transmits confirmation signaling to theUE, confirming to use one of the reported beams. In various embodiments, the confirmation signaling may be a control message, such as an acknowledgment, confirmation, or another suitable form of messaging that can convey confirmation to use one of the reported beams. Depending on the needs of a given implementation, the confirmation signaling may comprise a single message or a plurality (tw o or more) messages. In some implementations, signaling overhead may be reduced by use of a single message or only tw o messages. Where a given embodiment employs a plurality of messages, each message may be the same or may be different, depending on the needs of the given embodiment. Further, it should be understood that where “control message” is used herein, it refers to such confirmation signaling unless otherwise indicated.

[0200] — In some embodiments, the signaling may be a MAC CE, DCI, or RRC signaling, or a mixture of tw o or more of them, w hich may serve as a control message or control messages, depending on whether a given implementation employ s a single message or a plurality of messages. For low latency purposes, MAC CE or even DCI may be preferred. If low -latency MAC CE or low-latency RRC signaling is available, the low-latency signaling is preferred.

[0201] — In some embodiments, the confirmation signaling (which may be the aforementioned control message or MAC CE / DCI / RRC signaling) confirms to use the best reported beam, i.e., beam 2 in this example, as the new beam to be applied for the transmissions of the signal / channel. For instance, a 1 -bit field may be used to inform the UE whether or not the best reported beam is confirmed.

[0202] — In some embodiments, the confinnation signaling may confirm another reported beam satisfying an event criterion as the new beam to be applied for the transmissions of the signal / channel, i.e., becoming the Indicated TCI State or the current beam. This confirmation signaling design provides more flexibility, but may lead to higher signaling overhead, particularly if more than one control message is used. The confirmed beam may be a beam already in the Configured TCI State Pool and / or also in the Activated TCI State List. Alternatively, the confirmed beam may not be in the pool or not in the list, but is in the report satisfy ing an event criterion. In some embodiments, the confirmed beam is configured with an association between the beam (RS) and a TCI state or is configured as a (QCL) source RS in a TCI state, but the TCI state is not in the pool or not in the list. The association or the configuration is configured before the event occurs, and will be utilized in subsequent steps to apply the TCI state for transmission of the signal / channel.

[0203] — In some embodiments, the confinnation signaling may also include information about removing some beams from the Configured TCI State Pool or the Activated TCI State List. This may be done via signaling the corresponding TCI state ID(s). In other embodiments, this may be done via signaling the criteria for removing the TCI state, e.g., removing the beam(s) with the lowest Ll-RSRP as per the latest report with the to-be-removed beam (not necessarily in the report immediately before this signaling, but may be based on the last report where this to-be- removed beam was included, which could be a periodic / semi-persistent / event-triggered reporting). The number of beams to be removed is to ensure the Configured TCI State Pool or the Activated TCI State List is able to add a confirmed beam. In such embodiments, multiple (a plurality of) control messages may be employed as necessary, depending on the needs of a given embedment.

[0204] — Confirmation signaling content details may vary based on different conditions and will be elaborated and become apparent in below steps. Furthermore, in some embodiments, both a single control message and multiple (a plurality of) control message may be employed, at different various times, as signaling needs dictate. For example, in a possible embodiment a single control message may be employed when only activation of a new beam is needed, and multiple control messages may be employed when both a new beam is needed and one or more beams is to be removed.

[0205] - Step 706: NW and UE update TCI state (synchronously / autonomously, per protocols, in accordance with confirmation signaling info)

[0206] — This is a critical step to reduce the TCI state update and application latency. There are a few sub-steps, but not every sub-step needs to be executed. NW and UE updates TCI state related information, approximately synchronously (i.e.. the updates need not be exactly at the same time, but rather during a predetermined time window) and autonomously, per protocols, in accordance with confirmation signaling info. For the UE, no further explicit signaling may be received for the following updating steps. UE behavior is used as an example below. NW performs similarly .

[0207] — Step 706a: Associate a TCI state with beam 2

[0208] — UE associates a TCI state with beam 2, if beam 2 is not configured in a TCI state as a (QCL) source RS for the signal / channel. The to-be-associated TCI state may be a new TCI state to be generated / created by the UE (and mirrored by the gNB) based on existing configuration / activation information and confirmation signaling information, or an existing TCI state, which may be in or not in the Configured TCI State Pool, or in or not in the Activated TCI State List. Details follow.

[0209] — In some embodiments, the TCI state ID may be a first available TCI state ID; e g., if the existing TCI state IDs are {0, 1. 3, 5, 6}. then beam 2’s TCI state ID may be assigned as 2. In some other embodiments, the TCI state ID may be assigned by the network NW via the confirmation signaling, which would incur higher signaling overhead. In any case, an unambiguous approach is adopted for TCI state ID assignment so that both the UE and NW can assign the same TCI state ID to beam 2.

[0210] — In some embodiments, the QCL-Info in the new TCI state may be determined based on the current beam's QCL-Info, only replacing beam 1 source RS ID with beam 2 source RS ID, and also including beam 2’s cell / BWP info, if applicable. For example, if beam 1’s TCI state is as {TCI state ID = 3, QCL 1 = {cell 1, BWP 1, CSI-RS ID 3, QCL Type A}. QCL 2 = {cell 1, BWP 1, CSI-RS ID 7, QCL Type D} }, wherein beam 1 is the CSI-RS with ID 7, then the UE associates the new TCI state for beam 2 as {TCI state ID = 2. QCL 1 = {cell 1, BWP 1, CSI- RS ID 3, QCL Type A}, QCL 2 = {cell 1. BWP 1. CSI-RS ID 12, QCL Type D} }, wherein beam 2 is the CSI-RS with ID 12. If beam 1 is for PL RS or other purposes, then beam 2’s TCI state will also be for PL RS or the other purposes. That is. the UE may not require additional information to be signaled from the NW in the confirmation signaling to create the new TCI state.

[0211] — In some alternative embodiments, the QCL-Info in the new TCI state may be determined based on the new beam’s QCL-Info, e.g., in the new TCI state, beam 2 RS is a source RS providing QCL Type D source information, and beam 2’s QCL Type A (or B or C, ifapplicable) source RS is a source RS providing QCL Type A (or B or C, respectively) source information. If beam 2 can also provide QCL Type A (or B or C, if applicable) source information, e g., it is configured as a source RS providing QCL Type A (or B or C, if applicable) source information for any signal / chaimel, both QCL source RSs in the new TCI state can be beam 2 RS. Continuing with the above example, if beam 2 the CSI-RS with ID 12 is configured with a TCI state as {TCI state ID = 6, QCL 1 = {cell 1, BWP 1, CSI-RS ID 9, QCL Type A}, QCL 2 = {cell 1. BWP 1, SSB ID 2, QCL Type D} }, then the new TCI state may be {TCI state ID = 2, QCL 1 = {cell 1, BWP 1, CSI-RS ID 9, QCL Type A}. QCL 2 = {cell 1, BWP 1, CSI-RS ID 12, QCL Type D} }, that is, the non-spatial-filter QCL source RS is inherited from beam 2’s non-spatial-filter QCL source RS. Again, the UE may not require additional information to be signaled from the network NW in the confirmation signaling to create the new TCI state. If beam 2 is a SSB, which does not have a QCL source RS, then there can be a couple of options. One is that the SSB can be QCL Type C source and QCL Type D source for the signal / channel. if the signal / channel allows such a TCI state, such as when the signal / channel is a periodic tracking reference signal (TRS) or a CSI-RS for beam management (configured with repetition). Otherwise, the above embodiments that use the current beam’s non-spatial-filter QCL source RS in the new TCI state may be adopted for such a case.

[0212] — In some alternative embodiments, beam 2 is already configured with an association, and the association links beam 2 RS to a TCI state, where the TCI state is not in the Configured TCI State Pool. Then the UE does not need to generate a new TCI state after receiving the confirmation, but can use the association to determine the TCI state , and the TCI state will be applied in following steps. Details will be covered in descriptions for FIG. 8 ~ 11.

[0213] — In some embodiments, the same mechanism may be performed for other confirmed beams. For instance, the confirmation signaling may indicate a number of strongest beams (based on the report in Step 704), e.g., Nc = 3, then the UE associates 3 new TCI states for the top 3 beams (including beam 2 above). Alternatively, the confirmation may carry a list of beams, and each beam in the list will be associated with a new TCI state. When assigning TCI state IDs, the UE uses the remaining available TCI state IDs from lowest to highest for the beams from the strongest to the weakest, unless otherwise indicated by the network NW. In addition, the new TCI states also duplicate beam 1’s TCI state but replacing the TCI state ID as well as replacing beam 1 source RS ID in QCL-info with the confirmed beam’s RS ID. However, if otherwise indicated in the confirmation signaling info or protocols, the UE may duplicate another beam’s TCI state and replacethat beam ID.

[0214] — In some embodiments, one or more confirmed beams are already configured with a TCI state and in the Configured TCI State Pool. In that case, this sub-step is skipped for those beams, but this sub-step is still performed for other confirmed beams.

[0215] — Step 706b: Update the Configured TCI State Pool (adding beam 2)

[0216] — In some embodiments, this sub-step may be performed at the same time or jointly with the above sub-step. The UE updates the Configured TCI State Pool by adding beam 2’s TCI state ID into it. if it is not already in the pool. The UE may also remove some TCI states from the pool, e.g., when the pool size is at the maximum, and a beam with lowest reported quality (based on the latest report containing this beam) or indicated in the confirmation signaling is removed. In some embodiments, the other confirmed beams are also added to the pool, while potentially removing some existing beams. Note that when determining an available TCI state ID. the UE may first remove existing beams based on confirmation signaling indication (if any), or based on the number of beams to be added (to see if the pool maxim um would be exceeded, and when the pool maximum would be exceeded, the number of beams to remove is determined so that the maximum is not be exceeded), and then determine available TCI state IDs after the update.

[0217] — In some embodiments, this sub-step may not be performed if the TCI state is already in the pool. In some embodiments, this sub-step may not be performed if the signal / channel is a RS configured to follow unified TCI state, such as a SRS configured with followUnifiedTCI-StateSRS or an aperiodic CSI-RS configured with followUnifiedTCI-State. This may also be applied to some channels, e.g., PDCCH if the Coreset is configured with followUnificdTCI-Statc.

[0218] — Step 706c: Update the Activated TCI State List (adding beam 2)

[0219] — In some embodiments, UE updates the Activated TCI State List by adding beam2’s TCI state ID into it, if it is not already in the list. The UE may also remove some TCI states from the list, e.g., when the list size is already at the maximum, and a beam with lowest reported quality or indicated in the confirmation signaling is removed. In some embodiments, more than one inactive TCI state is added and more than one activated TCI state is removed.

[0220] - Step 706d: Update the current beam as beam 2

[0221] — In some embodiments, the UE may update the current beam as beam 2, if indicated / confinned in the confinnation signaling. In some embodiments, the confirmation signaling indicates a different beam as the new beam, and the UE follows the confirmation signaling. The beam is still viewed as the Indicated TCI State for the signal / channel. In some embodiments, this sub-step is indicated by the confirmation signaling not to be performed in this step, and will only be performed when signaled (e g., via DCI) by the netw ork.

[0222] - Step 707: Network NW and UE apply the current beam (the Indicated TCI State)

[0223] - In some embodiments, both the network NW and the UE apply the newly indicatedTCI state. In some embodiments, this may follow a DCI to indicate beam 2 (or another beamselected from the Activated TCI State List) for the signal / channel, and the DCI indication can be transmitted after the confirmation signaling. The application delay described above may still apply.

[0224] - Step 708: Network NW and UE perform signal / channel transmission using the current beam.

[0225] FIG. 8 illustrates a diagram of an example embodiment for a procedure of beam management based on event triggered report. A wireless device (e.g., UE) may receive (e.g., at time TO) one or more first (1st) reference signals ('RSs)Zbcams. and / or one or more second (2nd) RSs / beams from the base station (BS). The wireless device may perform beam measurements based on the one or more 1stRSs and / or the one or more 2ndRSs. The one or more 1stRSs may comprise one or more new (candidate) beams. In an example, the one or more 2ndRSs may be referred to as (or may comprise) one or more current beams. The current beam may be referred to as a QCL RS of an indicated TCI sate. The indicated TCI state may be a TCI state currently used by the wireless device for an uplink transmission and / or a downlink reception.

[0226] The wireless device may perform event detection or event evaluation based on the beam measurements. In response to the event being detected / triggered by the wireless device (e.g., certain conditions being fulfilled), the wireless device may transmit (e.g.. at time Tl) a (LI) beam measurement report to the base station. In an example, the event may mean (or indicate) that one or more new (candidate) beams (or new TCI states) (e.g.. the 1stRSs). with better beam quality than a currently used beam (or an indicated TCI state) (e.g., the 2ndRSs). are detected by the wireless device. In an example, the event may mean (or indicate) that one or more new (candidate) beams (or new TCI states) (e.g., the 1st RSs). with a threshold value better than a currently used beam (or an indicated TCI state) (e.g.. the 2ndRSs), are detected by the wireless device.

[0227] In an example, RRC messages may configure a list (or pool / group / set) of up to M TCI-State configurations within the higher layer parameter PDSCH-Config to decode PDSCH according to a detected PDCCH with DCI intended for the wireless device and the given serving cell, where M depends on the wireless device capability maxNumberConfiguredTCIst tesPerCC. Each TCI-State may contain parameters for configuring a quasi co-location (QCL) relationship between one or two dow nlink RSs and the DM-RS ports of the PDSCH. the DM-RS port of PDCCH or the CSI-RS port(s) of a CSLRS resource. The QCL relationship is configured by the higher layer RRC parameter qcl-Typel for a first DL RS, and qcl-Type2 for a second DL RS (if configured). For the case of two DL RSs, the QCL types may not be the same, regardless of whether the references are to the same DL RS or different DL RSs. The QCL types correspondingto each DL RS are given by the higher layer parameter qcl-Type in QCL-Info and may take one of the following values:

[0228] -'typeA': {Doppler shift, Doppler spread, average delay, delay spread}

[0229] -'typeB': {Doppler shift, Doppler spread}

[0230] -'typeC: {Doppler shift, average delay}

[0231] -'typeD': {Spatial Rx parameter}

[0232] In an example, the one or more configuration parameters may indicate a list of up to 128 TCI-State configurations, within the higher layer RRC parameter dl-OrJointTCI-StateList in PDSCH-Config. These TCI-State configurations may be used to provide QCL reference signal (s) for DM-RS of PDSCH and DM-RS of PDCCH in a bandwidth part (BWP) / component carrier (CC), for CSI-RS, and to provide a reference, if applicable, for determining UL TX spatial filter for dynamic-grant and configured-grant based physical uplink shared channel (PUSCH) and physical uplink control channel (PUCCH) resources in a BWP / CC, and sounding RS (SRS). A TCI state may be referred to as a downlink beam and / or an uplink beam. Each QCL RS associated with a TCI state may be referred to as a downlink beam and / or an uplink beam.

[0233] In an example, the RRC messages may configure a plurality of first TCI states. In an example, the base station may transmit, to the wireless device, a MAC CE activating a plurality of second TCI states from the plurality of first TCI states. In an example, the event may be that the quality of at least one new beam, such as Ll-RSRP, becomes a first threshold value better than a first RS derived from the activated TCI state with the M-th best quality in the plurality of second TCI states. The wireless device may receive (e.g., at time T2), from the base station, a confirmation command (or acknowledgment) for the (LI) beam (measurement) report. In response to receiving the confirmation command (or acknowledgment) from the base station, the wireless device may apply (e.g., duration from time T2 to T3) at least one new beam.

[0234] FIG. 9 illustrates a diagram of an example embodiment for procedures and definitions of different events. A wireless device (e.g.. UE) may receive one or more RRC messages from a base station (e.g.. network entity). The one or more RRC messages may comprise one or more configuration parameters indicating a plurality of first TCI states. The plurality of first TCI states may be a configured TCI state pool (or list / group / set). In an example, the base station may transmit, to the wireless device, a MAC CE activating a plurality of second TCI states from the plurality of first TCI states. The plurality of second TCI states may be an activated TCI state list (or pool / group / set). The base station may transmit, to the wireless device, a downlink control information (DCI) indicating a first TCI state from the plurality of second TCI states. The first TCI state (or the QCL RS of the first TCI state) may be referred to as the current beam used forthe current downlink receptions and / or uplink transmissions by the wireless device. The current beam may be a beam used by the wireless device for the current downlink receptions and / or current uplink transmissions. In an example, the one or more configuration parameters may indicate one or more first RSs. The one or more first (1st) RSs may be one or more new beams (or candidate beams). In an example, the one or more new beams (or candidate beams) may be one or more QCL RSs of TCI states of the configured TCI state pool / list. In an example, the one or more new beams (or candidate beams) may be one or more QCL RSs of TCI states, of the configured TCI state pool / list. except for the TCI states of the activated TCI state list / pool.

[0235] The event may comprise one or multiple events, such as Event 2, and / or Event 7. An Event 2 instance may indicate that a new beam from the one or more new beams is determined by the wireless device in response to the Ll-RSRP of the new beam becoming a first threshold value better than the current beam. For example, the difference between the Ll-RSRP value of the new beam and that of the current beam may be larger than the first threshold value. The difference (e.g., in dB) may be the Ll-RSRP value of the new beam minus the Ll-RSRP value of the current beam. An Event 7 instance may indicate that the quality of the new beam, such as Ll-RSRP value, becomes a second threshold value better than that of a first RS derived from the activated TCI state with the M-th best quality in the plurality of second TCI states. In an example, the first RS may be a QCL RS of the activated TCI state with the M-th best quality in the plurality of second TCI states. In an example, the first RS may have a QCL relationship (or may be quasi colocated (QCLed)) with the QCL RS of the activated TCI state with the M-th best quality in the plurality of second TCI states. For example, the Event 7 instance may be that the difference between the Ll-RSRP value of the new beam and the Ll-RSRP value of the first RS derived from the activated TCI state with the M-th best quality is larger than the second threshold value. The difference (e.g., in dB) may be the Ll-RSRP value of the new beam minus the Ll-RSRP value of the first RS derived from the activated TCI state with the M-th best quality in the plurality of second TCI states. In an example, the first RS may be at least one of the QCL RSs associated with the activated TCI state with the M-th best quality in the plurality of second TCI states.

[0236] In an example. Event 2 may be detected or triggered (e.g., Event 2 condition being fulfilled) by the wireless device in response to the number of Event 2 instance(s) detected by the wireless device for at least one same new beam being greater than or equal to a (configured) number K within a time window (or before a timer expired). Event 7 may be detected or triggered by the wireless device in response to the number of Event 7 instance(s) detected by the wireless device for at least one same new beam being greater than or equal to a (configured) number K within a time window (or before a timer expired). The wireless device may use a counter to count the Event 2 (or Event 7) instance(s). For example, the wireless device may increment the counter by one in response to detecting an Event 2 (or Event 7) instance. The wireless device may resetthe counter to zero in response to a value of the counter being less than the (configured) number K and the timer being expired. The one or more configuration parameters may indicate at least one of: the (configured) number K; the time window; the first threshold value; the second threshold value; a value of M; or the timer. K or M may be a positive integer.

[0237] FIG. 10 illustrates a diagram of an example embodiment for a procedure of beam management based on event triggered report. A wireless device (e.g., UE) may receive, at time TO, one or more radio resource control (RRC) messages from a base station (BS) (e.g.. gNB or network controller). The one or more RRC messages may comprise one or more configuration parameters indicating at least one of: one or more first (1st) reference signals (RSs) / bcams; one or more second (2nd) RSs / TCI states / beams; and / or an association between the one or more 1stRSs / beams and one or more TCI states. In an example, the association between the one or more 1stRSs / beams and the one or more TCI states may be at least one of the mapping relationships: a one-to-one mapping relationship between the one or more 1stRSs / beams and the one or more TCI states; one-to-many mapping relationship between the one or more 1stRSs / beams and the one or more TCI states; or many-to-one mapping relationship between the one or more 1stRSs / beams and the one or more TCI states. In an example, the association between the one or more 1stRSs / beams and the one or more TCI states may indicate that the one or more 1stRSs are QCL RSs of the one or more TCI states. In an example, the association between the one or more 1stRSs / beams and the one or more TCI states may indicate that the one or more 1stRSs are QCLed with QCL RS(s) of the one or more TCI states. For example, the wireless device may determine the one or more TCI states based on the one or more 1stRSs / beams and the association. The wireless device (e.g., UE) may receive, at time Tl, the one or more first RSs / beams, and / or the one or more second RSs / beams from the base station (BS). Each RS of the one or more 1stRSs (or 2ndRSs) may be referred to as a beam. The one or more 1stRSs (or the one or more 2ndRSs) may be: one or more channel state information RSs (CSI-RSs); one or more synchronization signal blocks (SSBs); and / or demodulation RSs (DMRSs). The wireless device may perform beam measurements based on the one or more 1stRSs and / or the one or more 2ndRSs.

[0238] The one or more 1stRSs may comprise (or may be referred to as) one or more new (candidate) beams. In an example, the one or more 2ndRSs may comprise (or may be referred to as) one or more current beams. In an example, the one or more configuration parameters may indicate a plurality of first TCI states (e.g.. a configured TCI state pool / list). In an example, the base station may transmit, to the wireless device, a MAC CE activating a plurality of second TCI states (e.g.. an activated TCI state list / pool) from the plurality of first TCI states. The base station may transmit (e.g., before Event 2 evaluation), to the wireless device, a downlink control information (DCI) indicating a first TCI state from the plurality of second TCI states. The first TCI state (or the QCL RS of the first TCI state) may be referred to as (or at least one of) the oneor more current beams. The current beam may be a beam used by tire wireless device for the current downlink receptions and / or current uplink transmissions. The first TCI state may be a TCI state currently used by the wireless device for an uplink transmission and / or a downlink reception. In an example, the first TCI state may be configured by the one or more RRC messages (or indicated by the one or more configuration parameters). In an example, the first TCI state may be indicated by the MAC CE. The wireless device may perform beam measurement based on the one or more 1stRSs (e.g., the one or more new (candidate) beams) and / or the one or more 2ndRSs (e.g., the one or more current beams). The beam measurement may comprise physical layer (LI) measurement(s). The wireless device may perform the LI measurement(s) based on the one or more new beams and / or the one or more current beams.

[0239] The physical layer (LI) measurement(s) may comprise a LI reference signal received power (Ll-RSRP) measurement, and / or a LI signal-to-interference-plus-noise ratio (Ll-SINR) measurement. The wireless device may perform event detection or event evaluation based on the beam measurements. In response to the Event 2 being detected / triggered by the wireless device (e.g., Event 2 condition being fulfilled based on beam measurements of the first TCI state indicated by the DCI / the MAC CE / the one or more RRC messages (e.g., current beam) and a new beam from the one or more 1stRSs), the wireless device may transmit, at time T2, a LI beam measurement report to the base station. In an example, the Event 2 may mean (or indicate) that one or more (new / candidate) beams / RSs from the one or more 1stRSs, with a first threshold value better than beam quality (e.g., Ll-RSRP value and / or Ll-SINR value) of the current beam (e.g., the first TCI state or QCL RS of the first TCI state), are detected by the wireless device. The one or more configuration parameters may indicate the first threshold value. The beam measurement report may indicate (or comprise) at least one of: the beam measurement results / values (e.g., Ll- RSRP values and / or Ll-SINR values) of the one or more new (candidate) RSs / beams; and / or one or more identifiers of the one or more new (candidate) RSs / beams. For example, the one or more identifiers of the one or more new (candidate) RSs / beams may be one or more CSI-RS resource indicators (CRIs) or SSB resource indicators (SSBRIs) of the one or more (new / candidate) RSs / beams from the one or more 1stRSs.

[0240] The wireless device may receive, at time T3, from the base station, a confirmation command (or acknowledgment) for the (LI) beam (measurement) report. It should be understood that this confirmation command or acknowledgment is a type of control message, as discussed above, and the reader is referred to the previous discussion of Step 705 of Fig. 7. In response to receiving the confirmation command (or acknowledgment) from the base station, the wireless device may apply, within the duration from time T3 to T4, the one or more (new / candidate) RSs / beams based on the association indicated by the one or more configuration parameters. For example, the wireless device may determine the one or more first TCI states associated with theone or more (new / candidate) RSs based on the association and the one or more (new / candidate) RSs. The one or more first TCI states may be from the one or more TCI states associated with the one or more 1stRSs / beams.

[0241] In an example, the plurality7of second TCI states (or the activated TCI state list / pool) may not comprise the one or more first TCI states associated with the one or more (new / candidate) RSs. The QCL RSs of the plurality of second TCI states (or the activated TCI state list / pool) may not comprise the one or more (new / candidate) RSs. In an example, the plurality of second TCI states (or the activated TCI state list / pool) may not comprise the one or more TCI states associated with the one or more 1stRSs / bcams. The QCL RSs of the plurality' of second TCI states (or the activated TCI state list / pool) may not comprise the one or more 1stRSs / beams. The wireless device may update the plurality' of second TCI states (or the activated TCI state list / pool) based on the association and the one or more (new / candidate) RSs in response to receiving the confirmation command / acknowledgement. For example, the wireless device may replace one or more activated TCI states with lowest quality in the plurality of second TCI states (or the activated TCI state list / pool) by the one or more first TCI states associated with the one or more (new / candidate) RSs. The replacement may comprise deactivating the one or more activated TCI states with lowest quality in the plurality of second TCI states (or the activated TCI state list / pool). The replacement may comprise removing the one or more activated TCI states with lowest quality from the plurality of second TCI states (or the activated TCI state list / pool). The replacement may comprise activating the one or more first TCI states associated with the one or more (new / candidate) RSs for the plurality of second TCI states (or the activated TCI state list / pool).

[0242] The replacement may comprise adding the one or more first TCI states associated with the one or more (new / candidate) RSs into the plurality' of second TCI states (or the activated TCI state list / pool). The number of the one or more activated TCI states to be replaced may be equal to (or less than) the number of the one or more first TCI states associated with the one or more (new / candidate) RSs. In an example, the plurality of first TCI states (or the configured TCI state pool / list) may not comprise the one or more first TCI states associated with the one or more (new / candidate) RSs. The QCL RSs of the plurality of first TCI states (or the configured TCI state pool / list) may not comprise the one or more (new / candidate) RSs. In an example, the plurality of first TCI states (or the configured TCI state pool / list) may not comprise the one or more TCI states associated with the one or more 1stRSs / beams. The QCL RSs of the plurality of first TCI states (or the configured TCI state pool / list) may not comprise the one or more 1stRSs / beams. The wireless device may update the plurality' of first TCI states (or the configured TCI state pool / list) based on the association and the one or more (new / candidate) RSs in response to receiving the confirmation command / acknowledgement. For example, the wireless device may replace one ormore second TCI states with a lowest quality in the plurality of first TCI states (or the configured TCI state pool / list) by the one or more first TCI states associated with the one or more (new / candidate) RSs.

[0243] The replacement may comprise removing the one or more second TCI states with lowest quality from the plurality of first TCI states (or the configmed TCI state pool / list). The replacement may comprise adding the one or more first TCI states associated with the one or more (new / candidate) RSs into the plurality of first TCI states (or the configured TCI state pool / list). In an example, the wireless device may receive a DCI from the base station after the update for the plurality of second TCI states (c.g., activated TCI state list / pool). The DCI may indicate a second TCI state from the updated plurality of second TCI states (or from the one or more first TCI states associated with the one or more (new / candidate) RSs). The wireless device may perform an uplink transmission and / or a downlink reception based on the second TCI state. For example, the wireless device may determine a spatial filter same as the one used for an uplink transmission and / or a downlink reception of the QCL RS of the second TCI state. The wireless device may perform an uplink transmission and / or a downlink reception based on the spatial filter.

[0244] In an example, the one or more (new / candidate) RSs indicated by the beam measurement report may comprise multiple (ncw / candidatc) RSs. The confinnation command / acknowledgement may indicate one or more third RSs from the multiple (new / candidate) RSs. In response to receiving the confirmation command (or acknowledgment) from tire base station, the wireless device may apply, in tire duration from time T3 to T4. the one or more third RSs / beams based on tire association indicated by the one or more configmation parameters. For example, the wireless device may determine one or more third TCI states associated with the one or more third RSs based on the association and the one or more third RSs. In an example, the plurality of second TCI states (or the activated TCI state list / pool) may not comprise the one or more third TCI states associated with the one or more third RSs. The QCL RSs of the plurality of second TCI states (or the activated TCI state list / pool) may not comprise the one or more third RSs. In an example, the plurality of second TCI states (or the activated TCI state list / pool) may not comprise the one or more TCI states associated with the one or more 1stRSs / beams. The QCL RSs of the plurality of second TCI states (or the activated TCI state list / pool) may not comprise the one or more 1stRSs / beams. The wireless device may update the plurality' of second TCI states (or the activated TCI state list / pool) based on the association and the one or more third RSs in response to receiving the confirmation command / acknowledgement (same procedures as aforementioned).

[0245] In an example, the plurality of first TCI states (or the configured TCI state pool / list) may not comprise the one or more third TCI states associated with the one or more third RSs. TheQCL RSs of the plurality of first TCI states (or the configured TCI state pool / list) may not comprise the one or more third RSs. In an example, the plurality of first TCI states (or the configured TCI state pool / list) may not comprise the one or more TCI states associated with the one or more 1stRSs / beams. The QCL RSs of the plurality' of first TCI states (or the configured TCI state pool / list) may not comprise the one or more 1stRSs / beams. The wireless device may update the plurality' of first TCI states (or the configured TCI state pool / list) based on the association and the one or more third RSs in response to receiving the confirmation command / acknowledgement (same procedures as aforementioned).

[0246] The confirmation command (or acknowledgment) from the base station may comprise at least one of: a physical downlink control channel (PDCCH), scrambled by a beam confirmation radio network temporary' identifier (RNTI) (BC-RNTI); a new data indicator (NDI) included in an uplink grant carried by a PDCCH; a PDCCH within a first search space; a MAC CE; an ACK; or PDCCH carried by a search space being different from the first search space. The first search space may be a dedicated search space only used for transmission of PDCCH indicating / for confirmation / acknowledgement of the (LI) beam (measurement) report by UE. The downlink reception may comprise at least one of: downlink receptions of transport block(s) via PDSCH; downlink receptions of DCI via PDCCH; downlink receptions of CSI-RSs: or downlink receptions of demodulation RSs (DMRS). The uplink transmission may comprise at least one of: uplink transmissions of transport block(s) via PUSCH; uplink transmissions of uplink control information (UCI) via PUCCH; uplink transmissions of sounding RSs (SRSs); uplink transmissions of preambles via PRACH; or uplink transmissions of DMRS.

[0247] FIG. 11 illustrates a diagram of an example embodiment for a procedure of beam management based on event triggered report. A wireless device (e.g., UE) may receive, at time TO, one or more radio resource control (RRC) messages from a base station (BS) (e.g., gNB or network controller). The one or more RRC messages may comprise one or more configuration parameters indicating at least one of: one or more first (1st) reference signals (RSs) / beams; one or more second (2nd) RSs / TCI states / beams; and / or an association between the one or more 1stRSs / beams and one or more TCI state pools / lists. The association between the one or more 1stRSs / beams and the one or more TCI state pools / lists may be at least one of the mapping relationships: a one-to-one mapping relationship between the one or more 1stRSs / beams and one or more TCI state pools / lists; one-to-many mapping relationship betw een the one or more 1stRSs / beams and one or more TCI state pools / lists; or many-to-one mapping relationship between the one or more 1stRSs / beams and one or more TCI state pools / lists. In an example, the association between the one or more 1stRSs / beams and the one or more TCI state pools / lists may indicate that the one or more 1stRSs are QCL RSs of TCI state(s) of the one or more TCI state pools / lists. In an example, the association between the one or more 1stRSs / beams and the one ormore TCI state pools / lists may indicate that the one or more 1stRSs are QCLed with QCL RSs of TCI state(s) of the one or more TCI state pools / lists. For example, the wireless device may determine the one or more TCI state pools / lists based on the one or more 1stRSs / beams and the association. The wireless device (e.g.. UE) may receive, at time Tl, the one or more first (1st) reference signals (RSs) / beams, and / or the one or more second RSs / beams from the base station. These are the same procedures as described above with respect to FIG. 10.

[0248] The wireless device may perform the physical layer (LI) measurement(s) based on the one or more new beams (e.g., the one or more 1stRSs) and / or the one or more current beams (e.g., the one or more 2ndRSs). In response to the Event 2 being dctcctcd / triggcrcd by the wireless device (e.g., Event 2 condition being fulfilled based on the first TCI state (e.g., current beam) and a new beam from the one or more 1stRSs), the wireless device may transmit, at time T2, a LI beam measurement report to the base station. In an example, the Event 2 may mean (or indicate) that one or more (new / candidate) beams / RSs (or new TCI states) from the one or more 1stRSs. with a first threshold value better than beam quality of the current beam (e.g., the first TCI state or QCL RS of the first TCI state), are detected by the wireless device.

[0249] The wireless device may receive, at time T3„ from the base station, a confirmation command (or acknowledgment) for the LI beam measurement report. In response to receiving the confirmation command (or acknowledgment) from the base station, the wireless device may apply, in a duration from time T3 to T4, the one or more (new / candidate) RSs / beams based on the association indicated by the one or more configmation parameters. For example, tire wireless device may select (or determine) one or more first TCI state pools / lists, from the one or more TCI state pools / lists, associated with the one or more (new / candidate) RSs based on the association and the one or more (new / candidate) RSs. The wireless device may determine one or more TCI states, from the selected / determined one or more first TCI state pools / lists, associated with the one or more (new / candidate) RSs based on the association and the one or more (new / candidate) RSs in response to receiving the confirmation command / acknowledgement. If the plurality of first TCI states (e.g., the configured TCI state pool / list) or the plurality of second TCI states (e.g.. the activated TCI state list / pool) do not comprise the one or more TCI states associated with the one or more (new / candidate) RSs / beams, the wireless device may update the plurality of first TCI states and / or the plurality of second TCI states based on the one or more (new / candidate) RSs / beams and the association indicated by the one or more configmation parameters. As mentioned above, these are the same procedmes as described above with respect to FIG. 10.

[0250] In an example, the one or more (new / candidate) RSs may comprise multiple (new / candidate) RSs. The confirmation command / acknowledgement may indicate one or more third RSs from multiple (new / candidate) RSs. In response to receiving the confirmation command (or acknowledgment) from the base station, the wireless device may apply, in a duration fromtime T3 to T4, the one or more third RSs / beams based on the association indicated by the one or more configuration parameters. For example, the wireless device may select (or determine) one or more second TCI state pools / lists, from die one or more TCI state pools / lists associated with the one or more (new / candidate) RSs, based on the association and the one or more third RSs. The wireless device may determine one or more third TCI states, from the selected / determined one or more second TCI state pools / lists, associated with the one or more third RSs based on the association and the one or more third RSs in response to receiving the confirmation command / acknowledgement.

[0251] If the plurality of first TCI states (c.g., the configured TCI state pool / list) or the plurality of second TCI states (e.g., the activated TCI state list / pool) do not comprise the one or more third TCI states associated with the one or more third RSs, the wireless device may update the plurality of first TCI states and / or the plurality of second TCI states based on the one or more third RSs and the association indicated by the one or more configuration parameters. These are the same procedures as discussed above with respect to FIG. 10.

[0252] FIG. 12A illustrates a diagram of an example embodiment for a procedure of beam management based on event triggered report. A wireless device (e.g., UE) may receive, at time TO, one or more radio resource control (RRC) messages from a base station (BS) (e.g.. gNB or network controller). The one or more RRC messages may comprise one or more configuration parameters indicating at least one of: one or more first (1st) reference signals (RSs) / beams; and / or one or more second (2nd) RSs / TCI state s / beams. In an example, the one or more configuration parameters may indicate a value of the M which may be used by a UE to identify a TCI state / RS / beam such that it is with M-th best quality' of an activated TCI state list / pool. The value of the M may be a positive integer. The wireless device (e.g.. UE) may receive, at time Tl, the one or more first reference signals (RSs) / beams, and / or the one or more second RSs / beams from the base station (BS).

[0253] The one or more configuration parameters may indicate a plurality' of first TCI states (e.g., a configured TCI state pool / list). The base station may transmit, to the wireless device, a MAC CE activating a plurality of second TCI states from the plurality' of first TCI states. The plurality of second TCI states may be the activated TCI state list / pool. In an example, the one or more 1stRSs may comprise one or more QCL RSs of TCI state(s) of the plurality of first TCI states (e.g., the configured TCI state pool / list). In an example, the one or more 1stRSs may have QCL relationship (or may be QCLed) with the one or more QCL RSs of TCI state(s) of the plurality of first TCI states (e.g., the configured TCI state pool / list). In an example, the one or more 1stRSs may comprise (or may be referred to as) one or more QCL RSs of TCI state(s), of the plurality of first TCI states (e.g., the configured TCI state pool / list). except for the TCI states of the plurality of second TCI sates (e.g., the activated TCI state list / pool). In an example, the oneor more 1stRSs may have QCL relationship (or may be QCLed) with the one or more QCL RSs of TCI state(s), of the plurality of first TCI states (e.g., the configured TCI state pool / list), except for the TCI states of the plurality of second TCI sates (e.g., the activated TCI state list / pool). In an example, the one or more 2ndRSs may be referred to as (or may comprise) one or more QCL RSs of a TCI state with M-th best quality in the plurality of second TCI states (e.g., the activated TCI state list / pool). In an example, the one or more 2ndRSs may have QCL relationship (or may be QCLed) with the one or more QCL RSs of a TCI state with M-th best quality in the plurality of second TCI states (e.g., the activated TCI state list / pool).

[0254] The wireless device may perform beam measurement based on the one or more 1stRSs and / or the one or more 2ndRSs. In response to the Event 7 being detected / triggered by the wireless device (e.g., Event 7 condition being fulfilled based on: the one or more QCL RSs (e.g., the one or more 2ndRSs) of a TCI state with M-th best quality in die activated TCI state list / pool; and a new beam from die one or more 1stRSs), the wireless device may transmit, at time T2, a LI beam measurement report to the base station. In an example, the Event 7 may mean (or indicate) that one or more (new / candidate) beams / RSs (or new TCI states) from the one or more 1stRSs. with a first threshold value better than beam quality of the TCI state with M-th best quality in the activated TCI state list / pool, are detected by the wireless device. The one or more configuration parameters may indicate the first threshold value.

[0255] The wireless device may receive, at time T3, from the base station, a confirmation command (or acknowledgment) for the LI beam measurement report. In response to receiving the confirmation command (or acknowledgment) from the base station, the wireless device may apply, in the duration from time T3 to T4, the one or more (new / candidate) RSs / beams to die activated TCI state list / pool. For example, the wireless device may determine one or more TCI states, from the configured TCI state pool / list (e g., the plurality of first TCI states), associated with the one or more (new / candidate) RSs in response to receiving the confirmation command / acknowledgement. If the plurality of second TCI states (or the activated TCI state list / pool) does not comprise the one or more TCI states associated with the one or more (new / candidate) RSs / beams, the wireless device may update the plurality of second TCI states based on the one or more TCI states. These are the same procedures as discussed above with respect to FIGS. 10 and 11.

[0256] In an example, the one or more (new / candidate) RSs may comprise multiple (new / candidate) RSs. The confirmation command / acknowledgement may indicate one or more third RSs from multiple (new / candidate) RSs. In response to receiving the confirmation command (or acknowledgment) from the base station, the wireless device may apply, in the duration from time T3 to T4. the one or more third RSs / beams to the activated TCI state list / pool. For example, the wireless device may determine one or more third TCI states, from the configured TCI statepool / list (e.g., the plurality of first TCI states), associated with the one or more third RSs in response to receiving the confirmation coimnand / acknowledgement. If the plurality of second TCI states (or the activated TCI state list / pool) does not comprise the one or more third TCI states associated with tire one or more third RSs, the wireless device may update the plurality' of second TCI states based on the one or more third TCI states. These are the same procedures as discussed above with respect fo FIGS. 10 and 11.

[0257] FIG. 12B illustrates a diagram of an example embodiment for a procedure of beam management based on an event triggered report. A wireless device (e.g., UE) may receive, at time TO, one or more radio resource control (RRC) messages from a base station (BS) (e.g.. gNB or network controller). The one or more RRC messages may comprise one or more configuration parameters indicating at least one of: one or more first (1st) reference signals (RSs) / beams; one or more second (2nd) RSs / TCI states / beams; and / or a timer. In an example, the one or more configuration parameters may indicate a value of tire M which may be used by a UE to identify a TCI state / RS / beam such that it is with M-th best quality of an activated TCI state list / pool. The value of the M may be a positive integer. In an example, the one or more configuration parameters may indicate a time offset value or a time window. The wireless device (e.g.. UE) may receive, at time Tl, the one or more 1streference signals (RSs)Zbeams, and / or the one or more 2ndRSs / beams from the base station (BS).

[0258] The one or more configuration parameters may indicate a plurality of first TCI states (e.g., a configured TCI state pool / list). The base station may transmit, to the wireless device, a MAC CE activating a plurality of second TCI states from the plurality of first TCI states. In an example, the base station may transmit, to the wireless device, a DCI indicating a seventh TCI state from the plurality of second TCI states. The wireless device may perform a current uplink transmission and / or downlink reception based on the seventh TCI state. The QCL RS of the seventh TCI state may be the current beam used for the current uplink transmission and / or downlink reception. The plurality of second TCI states may be the activated TCI state list / pool. In an example, the one or more 1stRSs may comprise (or may be referred to as) one or more QCL RSs of TCI state(s) of the plurality of first TCI states (e.g.. the configured TCI state pool / list). In an example, the one or more 1stRSs may have QCL relationship (or may be QCLed) with the one or more QCL RSs of TCI state(s) of the plurality of first TCI states (e.g., the configured TCI state pool / list). In an example, the one or more 1stRSs may comprise (or may be referred to as) one or more QCL RSs of TCI state(s), of the plurality of first TCI states (e.g.. the configured TCI state pool / list), except for the TCI states from the plurality of second TCI states (e.g., the activated TCI state list / pool).

[0259] In an example, the one or more 1stRSs may have QCL relationship (or may beQCLed) with the one or more QCL RSs of TCI state(s), of the plurality of first TCI states (e.g.,the configured TCI state pool / list), except for the TCI states from the plurality of second TCI states (e.g., the activated TCI state list / pool). In an example, the one or more 1stRSs may not comprise (or may be referred to as) one or more QCL RSs of TCI state(s), of the plurality of first TCI states (e.g., the configured TCI state pool / list). In an example, the one or more 1stRSs may not have QCL relationship (or may be QCLed) with the one or more QCL RSs of TCI state(s), of the plurality of first TCI states (e.g., the configured TCI state pool / list). In an example, the one or more 1stRSs may be one or more new (candidate) beams. In an example, the one or more 2ndRSs may be referred to as (or may comprise) one or more QCL RSs of a TCI state with M-th best quality in the plurality of second TCI states (e.g., the activated TCI state list / pool). In an example, the one or more 2ndRSs may have QCL relationship (or may be QCLed) with the one or more QCL RSs of a TCI state with M-th best quality in the plurality of second TCI states (e.g., the activated TCI state list / pool). In an example, the one or more 2ndRSs may be the current beam. The one or more 2ndRSs may be the QCL RS(s) of the seventh TCI state. The one or more 2ndRSs may have QCL relationship (or may be QCLed) with the QCL RS(s) of the seventh TCI state.

[0260] The wireless device may perform beam measurement based on the one or more 1stRSs and / or the one or more 2ndRSs. The wireless device may perform event detection or event evaluation (e.g., Event 2 and / or Event 7) based on the beam measurements. In response to the Event 2 or Event 7 being detected / triggered by the wireless device (e.g., Event 2 condition being fulfilled based on: the QCL RSs (e.g.. the one or more 2ndRSs) of the seventh TCI state; and a new beam from the one or more 1stRSs; or Event 7 condition being fulfilled based on: the one or more QCL RSs (e.g., the one or more 2ndRSs) of a TCI state with M-th best quality in the activated TCI state list / pool; and a new beam from the one or more 1stRSs), the wireless device may transmit, at time T2, a LI beam measurement report to the base station. In an example, the Event 2 may mean (or indicate) that one or more (new / candidate) beams / RSs (or new TCI states) from the one or more 1stRSs, with a first threshold value better than beam quality of the seventh TCI state, are detected by the wireless device. In an example, the Event 7 may mean (or indicate) that one or more (new / candidate) beams / RSs (or new TCI states) from the one or more 1stRSs, with a second threshold value better than beam quality’ of the TCI state with M-th best quality in the activated TCI state list / pool, are detected by the wireless device. The one or more configuration parameters may indicate the first threshold value or the second threshold value.

[0261] In an example, the wireless device may start or restart the timer from the end of the last symbol of the transmission of the beam measurement report. The wireless device may receive, at time T3. from the base station, a confirmation command (or acknowledgment) for the LI beam measurement report. In an example, the wireless device may start or restart the timer during a time interval starting from the end of the last symbol of the transmission of the beam measurement report to the reception of the confirmation command (or acknowledgment). Inresponse to receiving the confirmation command (or acknowledgment) from the base station, the wireless device may apply, in the duration from time T3 to T4, the one or more (new / candidate) RSs / beams to the activated TCI state list / pool. For example, the wireless device may determine one or more TCI states, from the configured TCI state pool / list (e.g., the plurality of first TCI states), associated with the one or more (new / candidate) RSs in response to receiving the confinnation command / acknowledgement.

[0262] In an example, the wireless device may activate the one or more TCI states, without activation latency, associated with the one or more (new / candidate) RSs in response to receiving the confirmation command (or acknow ledgment) and / or the timer being not expired. In an example, the wireless device may activate the one or more TCI states without activation latency, from the configured TCI state pool / list (e.g., the plurality of first TCI states), associated with the one or more (new / candidate) RSs in response to receiving the confinnation command (or acknowledgment) and / or the timer being not expired. In an example, the wireless device may activate the one or more TCI states, with activation latency, associated with the one or more (new / candidate) RSs in response to receiving the confirmation command (or acknowledgment) and / or the timer being expired. In an example, the wireless device may activate the one or more TCI states with activation latency, from the configured TCI state pool / list (e.g., the plurality of first TCI states), associated with the one or more (new / candidate) RSs in response to receiving the confirmation command (or acknowledgment) and / or the timer being expired.

[0263] In an example, the wireless device may activate the one or more TCI states, without activation latency, associated with the one or more (new / candidate) RSs in response to receiving the confirmation command (or acknowledgment) within the time offset value or the time window starting from the end of the last symbol of the transmission of the beam measurement report. In an example, the wireless device may activate the one or more TCI states without activation latency, from the configured TCI state pool / list (e.g., the plurality of first TCI states), associated with the one or more (new / candidate) RSs in response to receiving the confirmation command (or acknowledgment) within the time offset value or the time window starting from the end of the last symbol of the transmission of the beam measurement report. In an example, the wireless device may activate the one or more TCI states, with activation latency, associated with the one or more (new / candidate) RSs in response to receiving the confirmation command (or acknowledgment) outside of the time offset value or the time window starting from the end of the last symbol of the transmission of the beam measurement report. In an example, the wireless device may activate the one or more TCI states with activation latency, from the configured TCI state pool / list (e.g., the plurality of first TCI states), associated with the one or more (new / candidate) RSs in response to receiving the confirmation command (or acknowledgment) outside of the time offset value or the time window starting from the end of the last symbol of the transmission of the beammeasurement report. In an example, the wireless device may update the activated TCI state list / pool based on the one or more TCI states associated with the one or more (new / candidate) RSs. These are the same procedures as described above with respect to FIGS. 10-12A.

[0264] In an example, the one or more (new / candidate) RSs may comprise multiple (new / candidate) RSs. The confirmation command / acknowledgement may indicate one or more third RSs from multiple (new / candidate) RSs. In response to receiving the confirmation command (or acknowledgment) from the base station, the wireless device may apply, in the duration from time T3 to T4, the one or more third RSs / beams to the activated TCI state list / pool. For example, the wireless device may determine one or more third TCI states, from the configured TCI state pool / list (e.g., the plurality of first TCI states), associated with the one or more third RSs in response to receiving the confirmation command / acknowledgement. The association between the one or more third TCI states and the one or more third RSs may indicate that the one or more third RSs are QCL RS(s) of the one or more third TCI states. The association between the one or more third TCI states and the one or more third RSs may indicate that the one or more third RSs have a QCL relationship (or are QCLed) with QCL RS(s) of the one or more third TCI states.

[0265] In an example, the wireless device may activate the one or more third TCI states, without activation latency, associated with the one or more third RSs in response to receiving the confirmation command (or acknowledgment) and / or the timer being not expired. In an example, the wireless device may activate the one or more third TCI states without activation latency, from the configured TCI state pool / list (e.g., the plurality of first TCI states), associated with tire one or more third RSs in response to receiving the confirmation command (or acknowledgment) and / or the timer being not expired. In an example, the wireless device may activate the one or more third TCI states, with activation latency, associated with the one or more third RSs in response to receiving the confirmation command (or acknowledgment) and / or the timer being expired. In an example, the wireless device may activate the one or more third TCI states with activation latency, from the configured TCI state pool / list (e.g., the plurality of first TCI states), associated with the one or more third RSs in response to receiving the confirmation command (or acknowledgment) and / or the timer being expired.

[0266] In an example, the wireless device may activate the one or more third TCI states, without activation latency, associated with the one or more third RSs in response to receiving the confinnation command (or acknowledgment) within the time offset value or the time window starting from the end of the last symbol of the transmission of the beam measurement report. In an example, the wireless device may activate the one or more third TCI states without activation latency, from the configured TCI state pool / list (e.g., the plurality of first TCI states), associated with the one or more third RSs in response to receiving the confirmation command (or acknowledgment) within the time offset value or the time window starting from the end of the lastsymbol of the transmission of the beam measurement report. In an example, the wireless device may activate the one or more third TCI states, with activation latency, associated with die one or more third RSs in response to receiving the confinnation command (or acknowledgment) outside of the time offset value or die time window starting from the end of the last sy mbol of the transmission of die beam measurement report.

[0267] In an example, the wireless device may activate the one or more third TCI states with activation latency, from the configured TCI state pool / list (e.g., the plurality of first TCI states), associated with the one or more third RSs in response to receiving the confirmation command (or acknowledgment) outside of the time offset value or the time window starting from the end of the last sy mbol of the transmission of the beam measurement report. In an example, the w ireless device may update the activated TCI state list / pool based on the one or more third TCI states associated with the one or more third RSs (same procedure as aforementioned). The activation latency may comprise at least one of: time to first SSB transmission after confirmation command (or acknowledgment) is decoded by the wireless device; time for Rx beam refinement in FR2; time to first SSB transmission after Ll-RSRP measurement when TCI state switching involves QCL-TypeD;

[0268] FIG. 12C illustrates a diagram of an example embodiment for a format of an event triggered report. A beam measurement report triggered by Event 2 may indicate N reported beams. A value of N may be indicated by the one or more configuration parameters. The value of N may be a positive integer. At least one of N reported beam(s) may satisfy the condition of Event 2. The beam measurement report may indicate differential Ll-RSRP values or Ll-SINR values for one or more of the N reported beam(s). Differential L1-RSRP / L1-SINR value#2 through L1-RSRP / L1-SINR value #N and differential L1-RSRP / L1-SINR value for current beam may be determined by the wireless device based on the difference between measured Ll- RSRP / L1-SINR values corresponding to the CRI / SSBRI #2 through CRI / SSBRI #N / current beam and the measured L1-RSRP / L1-SINR corresponding to CRI / SSBRI#1. The beam measurement report triggered by Event 2 may indicate (or may comprise) at least one of: CRI / SSBRI #1 through CRI / SSBRI #N for the N reported beam(s); L1-RSRP / L1-S1NR value #1 for CRI / SSBRI #1 with largest value; differential L1-RSRP / L1-SINR value#2 through L1-RSRP / L1-SINR value #N; differential L1-RSRP / L1-SINR value of current beam; a CRI or SSBRI with lowest Ll- RSRP / L1-SINR value and satisfying the condition of Event 2; an identifier of Event 2; or the number of (how many) beams satisfying the condition of Event 2 in the reported beams.

[0269] FIG. 12D illustrates a diagram of a second example embodiment for a format of an event triggered report. A beam measurement report triggered by Event 7 may indicate N reported beams. A value of N may be indicated by the one or more configuration parameters. The value of N may be a positive integer. At least one of N reported beam(s) may satisfy the condition ofEvent 7. The beam measurement report may indicate differential Ll-RSRP values or Ll-SINR values for one or more of the N reported beam(s). Differential L1-RSRP / L1-SINR value#2 through L1-RSRP / L1-SINR value #N and differential L1-RSRP / L1-SINR value for QCL RS of a TCI state with M-th best quality in the activated TCI state list / pool may be determined by the wireless device based on the difference between measured L1-RSRP / L1-SINR values corresponding to the CRI / SSBRI #2 through CRI / SSBRI #N / the QCL RS and the measured Ll- RSRP / L1-SINR corresponding to CRI / SSBRI#1. The beam measurement report triggered byEvent 7 may indicate (or may comprise) at least one of: CRI / SSBRI #1 through CRI / SSBRI #N for the N reported beam(s): L1-RSRP / L1-SINR value #1 for CRI / SSBRI #1 with the largest Ll- RSRP / L1-SINR value; differential L1-RSRP / L1-SINR value#2 through LI -RSRP / L1 -SINR value #N; differential L1-RSRP / L1-SINR value of the QCL RS; a CRI or SSBRI with lowest Ll- RSRP / L1-SINR value and satisfying the condition of Event 7; an identifier of the TCI state with M-th best quality in the activated TCI state list / pool; an identifier of Event 7; or the number of (how many) beams satisfying the condition of Event 7 in the reported beams.

[0270] FIG. 12E illustrates a diagram of an example embodiment for a procedure of beam management based on event triggered report. A wireless device may receive 1201, from a network controller, one or more radio resource control (RRC) messages comprising configuration parameters. The configuration parameters may indicate one or more reference signals (RSs) for beam measurements. The configuration parameters may indicate a plurality of first transmission configuration indicator (TCI) states. The configuration parameters may indicate a threshold value. The configuration parameters may indicate an association betw een the one or more RSs and one or more TCI states. The wireless device may receive 1202, from the network controller, a MAC CE activating a plurality of second TCI states from the plurality of first TCI states. The wireless device may receive 1203. from the netw ork controller, a downlink control information indicating a first TCI state from plurality of second TCI states. The wireless device may determine 1204, based on an event evaluation, with the beam measurements of the one or more RSs, for an event, that a quality of at least one RS of the one or more RSs becomes the threshold value better than a first RS associated with the first TCI state. The wireless device may transmit 1205 a beam measurement report indicating the at least one RS in response to the event being fulfilled. The wireless device may receive 1206 a confirmation command or an acknowledgement for the beam measurement report. The wireless device may replace 1207, based on the association and the at least one RS, one or more TCI states of the plurality of second TCI states in response to receiving the confirmation command or the acknowledgement.

[0271] FIG. 12F illustrates a diagram of another example embodiment for a procedure of beam management based on an event triggered report. A network controller may transmit 1251, to a w ireless device, one or more radio resource control (RRC) messages comprising configurationparameters. The configuration parameters may indicate one or more reference signals (RSs) for beam measurements. The configuration parameters may indicate a plurality of first transmission configuration indicator (TCI) states. The configuration parameters may indicate a threshold value. The configuration parameters may indicate an association between the one or more RSs and one or more TCI states. The network controller may transmit 1252 a MAC CE activating a plurality of second TCI states from the plurality of first TCI states. The network controller may transmit 1253 a downlink control information indicating a first TCI state from plurality of second TCI states. The network controller may receive 1254 a beam measurement report indicating at least one RS from the one or more RSs. The network controller may transmit 1255 a confirmation command or an acknowledgement for the beam measurement report. The network controller may replace 1256, based on the association and the at least one RS. one or more TCI states of the plurality of second TCI states in response to transmitting the confirmation command or the acknowledgement.

[0272] FIG. 13 illustrates an example communications system 1300 in which some embodiments may be implemented. Communications system 1300 includes an access node 1310 serving user equipments (UEs) with coverage 1301, such as UEs 1320. In a first operating mode, communications to and from a UE passes through access node 1310 with a coverage area 1301. The access node 1310 is connected to a backhaul network 1315 for comiecting to the internet, operations and management, and so forth. In a second operating mode, communications to and from a UE do not pass through access node 1310, however, access node 1310 typically allocates resources used by the UE to communicate when specific conditions are met. Communications between a pair of UEs 1320 can use a sidelink connection (shown as two separate one-way connections 1325). In FIG. 13, the sideline communication is occurring between two UEs operating inside of coverage area 1301. However, sidelink communications, in general, can occur when UEs 1320 are both outside coverage area 1301. both inside coverage area 1301, or one inside and the other outside coverage area 1301. Communication between a UE and access node pair occur over uni-directional communication links, where the communication links between the UE and the access node are referred to as uplinks 1330, and the communication links between the access node and UE is referred to as downlinks 1335.

[0273] Access nodes may also be commonly referred to as Node Bs. evolved Node Bs (eNBs). next generation (NG) Node Bs (gNBs). master eNBs (MeNBs), secondary eNBs (SeNBs). master gNBs (MgNBs), secondary gNBs (SgNBs), network controllers, control nodes, base stations, access points, transmission points (TPs), transmission-reception points (TRPs). cells, carriers, macro cells, femtocells, pico cells, and so on, while UEs may also be commonly referred to as mobile stations, mobiles, terminals, users, subscribers, stations, and the like. Access nodes may provide wireless access in accordance with one or more wireless communication protocols, e.g.. the Third Generation Partnership Project (3GPP) long term evolution (LTE), LTEadvanced (LTE-A), 5G, 5G LTE, 5G NR, sixth generation (6G), High Speed Packet Access (HSPA), the IEEE 802.11 family of standards, such as 802.11a / b / g / n / ac / ad / ax / ay / be, etc. While it is understood that communications systems may employ multiple access nodes capable of communicating with a number of UEs, only one access node and tw o UEs are illustrated for simplicity .

[0274] FIG. 14 illustrates an example communication system 1400 in which some embodiments discussed herein may be implemented. In general, the system 1400 enables multiple wireless or wired users to transmit and receive data and other content. The system 1400 may implement one or more channel access methods, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), single-carrier FDMA (SC-FDMA), or non-orthogonal multiple access (NOMA).

[0275] In this example, the communication system 1400 includes electronic devices (ED) 1410a-1410c, radio access networks (RANs) 1420a-1420b. a core network 1430, a public switched telephone network (PSTN) 1440, the Internet 1450, and other networks 1460. While certain numbers of these components or elements are shown in FIG. 14, any number of these components or elements may be included in the sy stem 1400.

[0276] The EDs 1410a-1410c are configured to operate or communicate in the system 1400. For example, the EDs 1410a-1410c are configured to transmit or receive via wireless or wired communication channels. Each ED 1410a-1410c represents any suitable end user device and may include such devices (or may be referred to) as a user equipment or device (UE). wireless transmit or receive unit (WTRU), mobile station, fixed or mobile subscriber unit, cellular telephone, personal digital assistant (PDA), smartphone, laptop, computer, touchpad. wireless sensor, or consumer electronics device.

[0277] The RANs 1420a-1420b here include base stations 1470a-1470b, respectively. Each base station 1470a-1470b is configured to wirelessly interface with one or more of the EDs 1410a-1410c to enable access to the core network 1430, the PSTN 1440, the Internet 1450. or the other networks 1460. For example, the base stations 1470a-1470b may include (or be) one or more of several well-known devices, such as a base transceiver station (BTS), a Node-B (NodeB), an evolved NodeB (eNB), a Next Generation (NG) NodeB (gNB), a gNB centralized unit (gNB- CU), a gNB distributed unit (gNB-DU), a Home NodeB, a Home eNodeB, a site controller, an access point (AP), or a wireless router. The EDs 1410a-1410c are configured to interface and communicate with the Internet 1450 and may access the core network 1430, the PSTN 1440, or the other networks 1460.

[0278] In the embodiment shown in FIG. 14, the base station 1470a forms part of the RAN 1420a, which may include other base stations, elements, or devices. Also, the base station 1470b forms part of the RAN 1420b, which may include other base stations, elements, or devices. Each base station 1470a-1470b operates to transmit or receive wireless signals within a particular geographic region or area, sometimes referred to as a “cell.” In some embodiments, multiple-input multiple-output (MIMO) technology may be employed having multiple transceivers for each cell.

[0279] The base stations 1470a-1470b communicate with one or more of the EDs 1410a- 1410c over one or more air interfaces 1490 using wireless communication links. The air interfaces 1490 may utilize any suitable radio access technology.

[0280] It is contemplated that the system 1400 may use multiple channel access functionality, including such schemes as described above. In particular embodiments, the base stations and EDs implement 5G New Radio (NR), LTE, LTE-A, or LTE-B. Of course, other multiple access schemes and wireless protocols may be utilized.

[0281] The RANs 1420a-1420b are in communication with the core network 1430 to provide the EDs 1410a-1410c with voice, data, application, Voice over Internet Protocol (VoIP), or other sendees. Understandably, the RANs 1420a-1420b or the core network 1430 may be in direct or indirect communication with one or more other RANs (not shown). The core network 1430 may also serve as a gateway access for other networks (such as the PSTN 1440, the Internet 1450. and the other netw orks 1460). In addition, some or all of the EDs 1410a-1410c may include functionality' for communicating with different wireless netw orks over different w ireless links using different wtireless technologies or protocols. Instead of wireless communication (or in addition thereto), the EDs may communicate via wired communication channels to a service provider or switch (not shown), and to the Internet 1450.

[0282] Although FIG. 14 illustrates one example of a communication system, various changes may be made to FIG. 14. For example, the communication system 1300 could include any number of EDs, base stations, networks, or other components in any suitable configuration.

[0283] Figures 15A and 15B illustrate example devices that may implement some embodiments discussed herein. In particular, FIG. 15A illustrates an example ED 1510, and FIG. 15B illustrates an example base station 1570. These components could be used in the system 1400 or in any other suitable system.

[0284] As shown in FIG. 15A, the ED 1510 includes at least one processing unit 1500. The processing unit 1500 implements various processing operations of the ED 1510. For example, the processing unit 1500 could perform signal coding, data processing, power control, input / output processing, or any other functionality enabling the ED 1510 to operate in the system 1400. The processing unit 1500 also supports the methods and teachings described in more detail above.Each processing unit 1500 includes any suitable processing or computing device configured to perform one or more operations. Each processing unit 1500 could, for example, include a microprocessor, microcontroller, digital signal processor, field programmable gate array, or application specific integrated circuit.

[0285] The ED 1510 also includes at least one transceiver 1502. The transceiver 1502 is configured to modulate data or other content for transmission by at least one antenna or NIC (Network Interface Controller) 1504. The transceiver 1502 is also configured to demodulate data or other content received by the at least one antenna 1504. Each transceiver 1502 includes any suitable structure for generating signals for wireless or wired transmission or processing signals received wirelessly or by wire. Each anteima 1504 includes any suitable structure for transmitting or receiving wireless or wired signals. One or multiple transceivers 1502 could be used in the ED 1510, and one or multiple antennas 1504 could be used in the ED 1510. Although shown as a single functional unit, a transceiver 1502 could also be implemented using at least one transmitter and at least one separate receiver.

[0286] The ED 1510 further includes one or more input / output devices 1506 or interfaces (such as a wired interface to the Internet 1450, FIG. 14). The input / output devices 1506 facilitate interaction with a user or other devices (network communications) in the network. Each input / output device 1506 includes any suitable structure for providing information to or receiving information from a user, such as a speaker, microphone, keypad, keyboard, display, or touch screen, including network interface communications.

[0287] In addition, the ED 1510 includes at least one memory 1508. The memory 1508 stores instructions and data used, generated, or collected by the ED 1510. For example, the memory 1508 could store software or firmware instructions executed by the processing rmit(s) 1500 and data used to reduce or eliminate interference in incoming signals. Each memory 1508 includes any suitable volatile or non-volatile storage and retrieval device(s). Any suitable ty pe of memory may be used, such as random access memory (RAM), read only memory (ROM), hard disk, optical disc, subscriber identity' module (SIM) card, memory' stick, secure digital (SD) memory card, and the like.

[0288] As shown in FIG. 15B, the base station 1570 includes at least one processing rmit 1550, at least one transceiver 1552, which includes functionality for a transmitter and a receiver, one or more antennas 1556. at least one memory 1558, and one or more input / output devices or interfaces 1566. A scheduler, which would be understood by one skilled in the art, is coupled to the processing unit 1550. The scheduler could be included within or operated separately from the base station 1570. The processing rmit 1550 implements various processing operations of the base station 1570, such as signal coding, data processing, power control, input / output processing, orany other functionality . The processing unit 1550 can also support the methods and teachings described in more detail above. Each processing unit 1550 includes any suitable processing or computing device configured to perform one or more operations. Each processing unit 1550 could, for example, include a microprocessor, microcontroller, digital signal processor, field programmable gate array, or application specific integrated circuit.

[0289] Each transceiver 1552 includes any suitable structure for generating signals for wireless or wired transmission to one or more EDs or other devices. Each transceiver 1552 further includes any suitable structure for processing signals received wirelessly or by wire from one or more EDs or other devices. Although shown combined as a transceiver 1552, a transmitter and a receiver could be separate components. Each antenna 1556 includes any suitable structure for transmitting or receiving wireless or wired signals. While a common antenna 1556 is shown here as being coupled to the transceiver 1552, one or more anteimas 1556 could be coupled to the transceiver(s) 1552, allowing separate antennas 1556 to be coupled to the transmitter and the receiver if equipped as separate components. Each memory' 1558 includes any suitable volatile or non-volatile storage and retrieval device(s). Each input / output device 1566 facilitates interaction with a user or other devices (network communications) in the network. Each input / output device 1566 includes any suitable structure for providing information to or receiving / providing information from a user, including network interface communications.

[0290] FIG. 16 is a block diagram of a computing system 1600 that may be used for implementing the devices and methods disclosed herein. For example, tire computing system can be any entity' of UE, access netw ork (AN), mobility management (MM), session management (SM), user plane gateway (UPGW), or access stratum (AS). Specific devices may utilize all of the components shown or only a subset of the components, and levels of integration may vary from device to device. Furthermore, a device may contain multiple instances of a component, such as multiple processing units, processors, memories, transmitters, receivers, etc. The computing system 1600 includes a processing unit 1602. The processing unit includes a central processing unit (CPU) 1614, memory 1608, and may further include a mass storage device 1604, a video adapter 1610, and an I / O interface 1612 connected to a bus 1620.

[0291] The bus 1620 may be one or more of any type of several bus architectures including a memory bus or memory controller, a peripheral bus, or a video bus. The CPU 1614 may comprise any type of electronic data processor. The memory 1608 may comprise any type of non-transitory system memory such as static random access memory (SRAM), dynamic random access memory' (DRAM), synchronous DRAM (SDRAM), read-only memory (ROM), or a combination thereof. In an embodiment, the memory 1608 may include ROM for use at boot-up, and DRAM for program and data storage for use while executing programs.

[0292] The mass storage 1604 may comprise any ty pe of non-transitorv storage device configured to store data, programs, and other information and to make the data, programs, and other information accessible via the bus 1620. The mass storage 1604 may comprise, for example, one or more of a solid state drive, hard disk drive, a magnetic disk drive, or an optical disk drive.

[0293] The video adapter 1610 and the I / O interface 1612 provide interfaces to couple external input and output devices to the processing unit 1602. As illustrated, examples of input and output devices include a display 1618 coupled to the video adapter 1610 and a mouse, keyboard, or printer 1616 coupled to the I / O interface 1612. Other devices may be coupled to the processing unit 1602, and additional or fewer interface cards may be utilized. For example, a serial interface such as Universal Serial Bus (USB) (not shown) may be used to provide an interface for an external device.

[0294] The processing unit 1602 also includes one or more network interfaces 1606, which may comprise wired links, such as an Ethernet cable, or wireless links to access nodes or different networks. The network interfaces 1606 allow the processing unit 1602 to communicate with remote units via the networks. For example, the network interfaces 1606 may provide wireless communication via one or more transmitters / transmit antennas and one or more receivers / receive antennas. In an embodiment, the processing unit 1602 is coupled to a local-area netw ork 1622 or a widc-arca netw ork for data processing and communications with remote devices, such as other processing units, the Internet, or remote storage facilities.

[0295] It should be appreciated that one or more steps of the embodiment methods provided herein may be performed by corresponding units or modules. For example, a signal may be transmitted by a transmitting unit or a transmitting module. A signal may be received by a receiving unit or a receiving module. A signal may be processed by a processing unit or a processing module. Other steps may be performed by a performing unit or module, a generating unit or module, an obtaining unit or module, a setting unit or module, an adjusting unit or module, an increasing unit or module, a decreasing unit or module, a determining unit or module, a modifying unit or module, a reducing unit or module, a removing unit or module, or a selecting unit or module. The respective units or modules may be hardware, software, or a combination thereof. For instance, one or more of the units or modules may be an integrated circuit, such as field programmable gate arrays (FPGAs) or application-specific integrated circuits (ASICs).

[0296] Although the present disclosure and its advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope of this disclosure. For example, the technique described in this disclosure may include additional or few er operations than those shown and described and may be carried out or performed in a different order (c.g., similar steps in the reversed order compared tothe described order of operations). For another example, steps described herein apply to various sides of netw ork communications (for example, betw een a base station and a UE or betw een tw o UEs), and where steps for one side are disclosed then corresponding steps on the other side are also understood to be disclosed by those of skill in the art. Moreover, the scope of the disclosure is not intended to be limited to the particular embodiments described herein, as one of ordinary skill in the art will readily appreciate from this disclosure that processes, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed, may perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.

Claims

WHAT IS CLAIMED IS:

1. A method performed by a user equipment (UE), the method comprising: performing, by the UE with a network entity, a first communication with one or more signals based on a first transmission configuration indicator (TCI) state, wherein the first TCI state includes a first reference signal (RS) as a source RS for the one or more signals; reporting, by the UE to the network entity, a measurement quality of a second RS, wherein the measurement quality of the second RS and a measurement quality of the first RS meet an event criterion; receiving, by the UE from the network entity, a control message; applying, by the UE in response to receiving the control message, a second TCI state for the one or more signals, wherein the second TCI state comprises the second RS as a source RS for the one or more signals; and performing, by the UE with the network entity, a second communication based on the one or more signals with the second TCI state.

2. The method of claim 1. wherein applying, by the UE in response to receiving the control message, the second TCI state further comprises including, by the UE, the second TCI state into a list of TCI states configured for the one or more signals.

3. The method of claim 1 or 2, wherein applying, by the UE in response to receiving the control message, the second TCI state further comprises: configuring, by the UE, the second TCI state including the second RS as the source RS for the one or more signals; or generating, by the UE, the second TCI state including the second RS as the source RS for the one or more signals.

4. The method of any of claims 1 to 3. wherein applying, by the UE in response to receiving the control message, the second TCI state further comprises one or more of: applying, by the UE. the second TCI state including the second RS as the source RS for the one or more signals; and including, by the UE. the second TCI state into a list of TCI states activated for the one or more signals.

5. The method of any of claims 1-4, wherein applying, by the UE in response to receiving the control message, a second TCI state further comprises: switching, by the UE. from the first TCI state to the second TCI state, wherein the second TCI state includes the second RS as the source RS for the one or more signals, the second TCIstate is in a list of TCI states configured for the one or more signals, and the switching is within a time duration indicated by a parameter of time duration for quasi-co-location (QCL).

6. The method of any of claims 1-5, wherein the control message is one of a medium access control control element (MAC CE), a downlink control information (DCI), a radio resource control (RRC) message, or an acknowledgment.

7. The method of any of claims 1-6, wherein applying, by the UE in response to receiving the control message, a second TCI state further comprises: including, by the UE, the second TCI state into a list of TCI states configured for the one or more signals, wherein the second TCI state is configured in a first association between the second RS and the second TCI state.

8. The method of any of claims 1-7, further comprising: receiving, by the UE from the network entity, one or more configuration parameters indicating: one or more RSs for beam measurements including the second RS; a plurality of first TCI states including the first TCI state: a threshold value; and a first association between the one or more RSs and one or more first TCI states: receiving a MAC CE activating a plurality' of second TCI states from the plurality of first TCI states, the plurality of second TCI states comprising the first TCI state; receiving downlink control information (DCI) indicating the first TCI state from plurality of second TCI states; determining, based on an event evaluation, with the beam measurements of the one or more RSs, for an event, that a measurement quality of at least one RS of the one or more RSs including the second RS becomes the threshold value better than the first RS; transmitting, in response to the event being fulfilled, a beam measurement report indicating the at least one RS including the second RS; receiving a confirmation command or an acknowledgement for the beam measurement report in the control message; and replacing, in response to receiving the confirmation command or the acknowledgement, based on the first association and the at least one RS including the second RS, one or more second TCI states of the plurality of second TCI states by one or more third TCI states associated with the at least one RS.

9. The method of claim 8, wherein the configuration parameters indicating the one or more RSs indicate a first RS set comprising the one or more RSs.

10. The method of claim 8, wherein the configuration parameters indicating the one or more RSs indicate a plurality of RS sets comprising a second RS set comprising the one or more RSs.

11. The method of claim 10, further comprising receiving a second MAC CE activating the second RS set.

12. The method of any of claims 8-11, wherein the one or more RSs are quasi co-location (QCL) RSs of the one or more first TCI states.

13. The method of any of claims 8-12, wherein the threshold value is a physical layer reference signal received power (RSRP) value or a physical layer signal to interference and noise ratio (SINR) value.

14. The method of any of claims 8-13, wherein the one or more RSs comprise at least one of: one or more channel state information reference signals (CSI-RSs); one or more synchronization signal blocks (SSBs): or one or more demodulation reference signals (DMRSs).

15. The method of any of claims 8-14, wherein the beam measurements comprise physical layer (LI) reference signal received power (RSRP) measurements or LI signal to interference and noise ratio (SINR) measurements of the one or more RSs.

16. The method of any of claims 8-15, wherein the measurement quality of the at least one RS comprises an Ll-RSRP value or an Ll-SINR value of the at least one RS.

17. The method of any of claims 8-16, wherein the event being fulfilled comprises that a value of a counter is equal to or greater than a second threshold value before a timer expires.

18. The method of claim 17, further comprising incrementing the counter by one in response to determining that the measurement quality of the at least one RS of the one or more RSs becomes at least the threshold value better than the first RS associated with the first TCI state.

19. The method of claim 18, wherein the configuration parameters indicate at least one of: the second threshold value, the counter, and the timer.

20. The method of any of claims 8-19, wherein the beam measurement report is a physical layer (LI) beam measurement report.

21. The method of any of claims 8-20, wherein transmitting the beam measurement report comprises transmitting a first uplink signal via a first uplink channel and transmitting the beam measurement report via a second uplink channel.

22. The method of claim 21, wherein die first uplink signal indicates one or more resources used for transmission of the beam measurement report via the second uplink channel.

23. The method of any of claims 8-22, wherein the confirmation command or the acknowledgement for die beam measurement report comprises at least one of: a physical downlink control channel (PDCCH) scrambled by a beam confirmation radio network temporary identifier (RNTI) (BC-RNTI); a new data indicator (NDI) included in an uplink grant carried by a PDCCH; a PDCCH within a first search space; a MAC CE; an ACK; or PDCCH carried by a search space being different from the first search space.

24. The method of any of claims 8-23, wherein the replacing, based on the first association and the at least one RS, one or more TCI states comprises deactivating the one or more TCI states and activating one or more second TCI states for the plurality of second TCI states.

25. The method of claim 24, further comprising determining the one or more second TCI states based on the first association and the at least one RS.

26. The method of claim 25, wherein the one or more second TCI states are associated with the at least one RS.

27. The method of claim 26, wherein the association between the one or more second TCI states and the at least one RS indicates that the at least one RS are quasi-co-location (QCL) RS(s) of the one or more second TCI states.

28. The method of any of claims 26-27. wherein the association between the one or more second TCI states and the at least one RS indicates that the at least one RS have a QCL relationship with QCL RS(s) of the one or more second TCI states.

29. The method of any of claims 8-28, further comprising receiving a second downlink control information indicating a second TCI state from the one or more third TCI states.

30. The method of claim 29, further comprising transmitting or receiving a transport block based on the second TCI state.

31. The method of any of claims 1-30, wherein the first communication or the second communication is a transmission, a reception, or both.

32. The method of any of claims 1-31, wherein the one or more signals are transmitted or received via one or more channels.

33. The method of any of claims 1-32, wherein the control message comprises a plurality of messages.

34. The method of any of claims 1-32, wherein the control message is a single message.

35. The method of any of claims 1-34, wherein the source RS is a QCL source RS.

36. A user equipment (UE) comprising: at least one processor; and a non-transitory computer readable storage medium storing programming, the programming including instructions that, when executed by the at least one processor, cause the UE to perform a method according to any of claims 1-35.

37. A non-transitory computer-readable medium having instructions stored thereon that, when executed by a user equipment (UE). cause the UE to perform a method according to any of claims 1-35.

38. A method performed by a network entity, the method comprising: transmitting, to a wireless device, one or more configuration parameters indicating: one or more reference signals (RSs) for beam measurements; a plurality of first transmission configuration indicator (TCI) states; a threshold value; and an association between the one or more RSs and one or more first TCI states; transmitting a medium access control control element (MAC CE) activating a plurality of second TCI states from the plurality' of first TCI states; transmitting a downlink control information indicating a first TCI state from plurality of second TCI states; receiving, from the wireless device, a beam measurement report indicating at least one RSfrom the one or more RSs; transmitting a confirmation command or an acknowledgement for the beam measurement report; and replacing, in response to transmitting the confirmation command or the acknowledgement and based on the association and the at least one RS, one or more second TCI states from the plurality of second TCI states with one or more third TCI states associated with the at least one RS.

39. The method of claim 38, wherein the configuration parameters indicating the one or more RSs indicate a first RS set comprising the one or more RSs.

40. The method of claim 38 or 39, wherein the configuration parameters indicating the one or more RSs indicate a plurality of RS sets comprising a second RS set, the second RS set comprising the one or more RSs.

41. The method of claim 40, further comprising transmitting a second MAC CE activating the second RS set.

42. The method of any of claims 38-41. wherein the one or more RSs are quasi co-location RSs of the one or more first TCI states.

43. The method of any of claims 38-42. wherein the threshold value is a physical layer (LI) reference signal received power (RSRP) value or an LI signal to interference and noise ratio (S1NR) value.

44. The method of any of claims 38-43. wherein the one or more RSs comprise at least one of: one or more channel state information reference signals (CSI-RSs); one or more synchronization signal blocks (SSBs); or one or more demodulation reference signals (DMRSs).

45. The method of any of claims 38-44, wherein the beam measurements comprise LI RSRP measurements or LI SINR measurements of the one or more RSs.

46. The method of any of claims 38-45, wherein the configuration parameters indicate at least one of a second threshold value, a counter, and a timer.

47. The method of any of claims 38-46, wherein the beam measurement report is an LI beam measurement report.

48. The method of any of claims 38-47, wherein receiving the beam measurement report comprises receiving a first uplink signal via a first uplink channel and receiving the beam measurement report via a second uplink channel.

49. The method of claim 48, wherein die first uplink signal indicates one or more resources used for transmission of the beam measurement report via the second uplink channel.

50. The method of any of claims 38-49, wherein the confinnation command or the acknowledgement for die beam measurement report comprises at least one of: a physical downlink control channel (PDCCH) scrambled by a beam confirmation radio network temporary identifier (RNTI) (BC-RNTI); a new data indicator (NDI) included in an uplink grant carried by a PDCCH; a PDCCH within a first search space; a MAC CE; an acknowledgment (ACK); or PDCCH carried by a search space being different from the first search space.

51. The mediod of any of claims 38-50. wherein replacing, based on the association and the at least one RS, one or more TCI states comprises deactivating the one or more TCI states and activating one or more second TCI states for the plurality of second TCI states.

52. The method of claim 51, further comprising determining the one or more second TCI states based on the association and the at least one RS.

53. The method of claim 52, wherein the one or more second TCI states are associated with the at least one RS.

54. The method of claim 53, wherein the association between the one or more second TCI states and the at least one RS indicates that the at least one RS are quasi-co-location (QCL) RS(s) of the one or more second TCI states.

55. The method of claim 53, wherein the association between the one or more second TCI states and the at least one RS indicates that the at least one RS have a QCL relationship with QCL RS(s) of the one or more second TCI states.

56. The method of any of claims 38-55, further comprising transmitting a second downlink control information indicating a second TCI state from the one or more third TCI states.

57. The method of claim 56, further comprising receiving or transmitting a transport block based on the second TCI state.

58. The method of any of claims 38-57, wherein the wireless device is a user equipment.

59. The method of any of claims 38-58, wherein the confirmation command or acknowledgement for the beam measurement report comprises a plurality of messages.

60. The method of any of claims 38-58, wherein the confirmation command or acknowledgment for the beam measurement report comprises a single message.

61. A method performed by a network entity, comprising: performing, by the network entity with a user equipment (UE), a first communication based on one or more signals with a first transmission configuration indicator (TCI) state, wherein the first TCI state comprises a first reference signal (RS) as a source RS for the one or more signals; receiving, from the UE, a measurement quality of a second RS, wherein the measurement quality of the second RS and a measurement quality of the first RS meet an event criterion; transmitting, to the UE, a control message; and performing, by the network entity with the UE, in response to transmitting the control message, a second communication with the one or more signals according to a second TCI state, wherein the second TCI state comprises the second RS.

62. The method of claim 61, wherein the control message is one of a medium access control control element (MAC CE), a downlink control information (DCI). or a radio resource control (RRC) message.

63. The method of claim 61 or 62, further comprising transmitting, to the UE. one or more configuration parameters indicating: one or more reference signals (RSs) for beam measurements: a plurality of first TCI states, wherein the plurality of first TCI states include the first TCI state; a threshold value; and an association between the one or more RSs and one or more of the plurality' of first TCI states.

64. The method of claim 63, wherein the configuration parameters indicating the one or more RSs indicate a first RS set comprising the one or more RSs.

65. The method of claim 63 or 64, wherein the configuration parameters indicating the one or more RSs indicate a plurality of RS sets comprising a second RS set, the second RS set comprising the one or more RSs.

66. The method of claim 65, further comprising transmitting a second MAC CE activating the second RS set.

67. The method of any of claims 63-66, wherein the one or more RSs are quasi co-location RSs of the one or more of the plurality of first TCI states.

68. The method of any of claims 63-67, wherein the threshold value is a physical layer (LI) reference signal received power (RSRP) value or an LI signal to interference and noise ratio (SINR) value.

69. The method of any of claims 63-68, wherein the one or more RSs comprise at least one of: one or more channel state information reference signals (CSI-RSs); one or more synchronization signal blocks (SSBs): or one or more demodulation reference signals (DMRSs).

70. The method of any of claims 63-69. wherein the configuration parameters indicate at least one of a second threshold value, a counter, and a timer.

71. The method of any of claims 61-70. wherein the measurement quality of the first RS or the measurement quality of the second RS comprise LI RSRP measurements or LI SINR measurements of the one or more RSs.

72. The method of any of claims 61-71. wherein the measurement quality of the first RS or the measurement quality of the second RS is an LI beam measurement report.

73. The method of any of claims 61-72. wherein receiving the measurement quality of the first RS or the measurement quality of the second RS comprises receiving a first uplink signal via a first uplink channel and receiving the measurement quality of the first RS or the measurement quality of the second RS via a second uplink channel.The method of claim 73, wherein die first uplink signal indicates one or more resources used for transmission of the measurement quality of the first RS or the measurement quality of the second RS via die second uplink channel.

75. The method of any of claims 61-74, wherein the control message comprises at least one of: a physical downlink control channel (PDCCH) scrambled by a beam confinnation radio network temporary identifier (RNTI) (BC-RNTI); a new data indicator (NDI) included in an uplink grant carried by a PDCCH; a PDCCH within a first search space; a MAC CE; an acknowledgment (ACK); or PDCCH carried by a search space being different from the first search space.

76. The method of any of claims 61-75. wherein performing, in response to transmiting the control message, a second communication with the one or more signals according to a second TCI state comprises deactivating the first TCI state and activating the second TCI state.

77. The method of claim 76, further comprising determining the second TCI state based on the second RS.

78. The method of claim 77, wherein the second TCI state is associated with at least one RS.

79. The method of claim 78, wherein the association between the second TCI state and the at least one RS indicates that the at least one RS are quasi-co-location (QCL) RS(s) of the second TCI state.

80. The method of claim 78, wherein the association between the second TCI state and the at least one RS indicates that the at least one RS have a QCL relationship with QCL RS(s) of the second TCI state.

81. The method of any of claims 61-80. further comprising transmiting a second downlink control information indicating the second TCI state from one or more third TCI states.

82. The method of claim 81, further comprising receiving or transmiting a transport block based on the second TCI state.

83. The method of any of claims 61-82. wherein the first communication or the second communication is a transmission, a reception, or both.

84. The method of any of claims 61-83, wherein the one or more signals are transmitted or received via one or more channels.

85. The method of any of claims 61-84, wherein the control message comprises a plurality of messages.

86. The method of any of claims 61-84, wherein the control message comprises a single message.

87. The method of any of claims 61-86, wherein the source RS is a QCL source RS.

88. A network controller comprising: at least one processor; and a non-transitory computer readable storage medium storing programming, the programming including instructions that, when executed by the at least one processor, cause the network controller to perform a method according to any of claims 38-87.

89. A non-transitory computer-readable medium having instructions stored thereon that, when executed by a network controller, cause the network controller to perform a method according to any of claims 38-87.

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