Beam collision handling for multiple transmit receive point systems

Abstract

Systems, methods, and apparatus for wireless communication are described. A wireless communication method includes receiving, by a wireless device, a transmission configuration indication (TCI) state specific to a first indication of a first control resource set pool index and a TCI state specific to a second indication of a second control resource set pool index. The method also includes receiving, by the wireless device, downlink control information (DCI) that schedules a physical downlink shared channel (PDSCH), wherein the DCI is associated with a control resource set pool index from the first control resource set pool index and the second control resource set pool index. The method also includes determining, by the wireless device and based on the DCI, a TCI state of the PDSCH.

Description

Beam collision handling in multi-transmitter receiver systems Technical Field

[0001] This patent document typically relates to wireless communication. Background Technology

[0002] Mobile communication technologies are driving the world toward an increasingly interconnected and networked society. Compared to existing wireless networks, next-generation systems and wireless communication technologies will need to support a wider range of use case characteristics and provide more complex and sophisticated access requirements and flexibility.

[0003] LTE (Long Term Evolution) is a wireless communication standard for mobile devices and data terminals developed by the 3rd Generation Partnership Project (3GPP). LTE Evolution (LTE-A) is a wireless communication standard that enhances the LTE standard. The fifth-generation wireless system (5G) further develops upon the LTE and LTE-A wireless standards, aiming to support higher data rates, massive connectivity, ultra-low latency, high reliability, and other emerging service requirements. Summary of the Invention

[0004] A technique is disclosed for determining the Transmission Configuration Indicator (TCI) state of the Physical Downlink Shared Channel (PDSCH) and the Quasi-Co-location (QCL) attributes of the Aperiodic Channel State Information Reference Signal (AP-CSI-RS) in Multiple Transmitter Receiver Point (MTRP) operation. This determination can be based on Downlink Control Information (DCI) or Downlink (DL) signals. The determination can also be based on the type of DL signal and whether the User Equipment (UE) supports multiple default beams.

[0005] A first example wireless communication method includes: receiving, by a wireless device, a Transmission Configuration Indication (TCI) state specific to a first control resource set pool index and a TCI state specific to a second control resource set pool index. The method further includes receiving, by the wireless device, downlink control information (DCI) scheduling a physical downlink shared channel (PDSCH), wherein the DCI is associated with a control resource set pool index from both the first and second control resource set pool indices. The method also includes: determining, by the wireless device, the TCI state of the PDSCH based on the DCI.

[0006] A second example wireless communication method includes: receiving downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH) by a wireless device, wherein the scheduling offset between the PDSCH and the DCI is less than a threshold. The method further includes: prioritizing the reception of a physical downlink control channel (PDCCH) by the wireless device, wherein the PDCCH and PDSCH overlap in at least one time unit. The method also includes: receiving the PDCCH by the wireless device.

[0007] A third example of a wireless communication method includes: receiving a downlink (DL) signal by a wireless device. The method further includes: receiving downlink control information (DCI) that triggers an aperiodic channel state information reference signal (AP-CSI-RS) by the wireless device, wherein the trigger offset between the AP-CSI-RS and the DCI is less than a threshold, and wherein the AP-CSI-RS and the DL signal overlap in at least one time unit. The method further includes: determining a quasi-co-address (QCL) attribute of the AP-CSI-RS by the wireless device based on the DL signal.

[0008] A fourth example wireless communication method includes: a network node transmitting a Transmission Configuration Indication (TCI) state specific to a first indication of a first control resource set pool index and a TCI state specific to a second control resource set pool index. The method further includes: a network node transmitting downlink control information (DCI) scheduling a Physical Downlink Shared Channel (PDSCH), wherein the DCI is associated with a control resource set pool index from both the first and second control resource set pool indices. The method also includes: a network node transmitting the PDSCH according to the TCI state based on the DCI.

[0009] A fifth example of a wireless communication method includes: a network node transmitting downlink control information (DCI) that schedules a physical downlink shared channel (PDSCH), wherein the scheduling offset between the PDSCH and the DCI is less than a threshold. The method further includes: a network node prioritizing the transmission of a physical downlink control channel (PDCCH), wherein the PDCCH and PDSCH overlap in at least one time unit. The method also includes: a network node transmitting the PDCCH.

[0010] A sixth example of a wireless communication method includes: transmitting downlink (DL) signals by a network node. The method further includes transmitting downlink control information (DCI) by the network node to trigger an aperiodic channel state information reference signal (AP-CSI-RS), wherein the trigger offset between the AP-CSI-RS and the DCI is less than a threshold, and wherein the AP-CSI-RS and the DL signal overlap in at least one time unit. The method also includes transmitting the AP-CSI-RS by the network node based on the DL signal, according to quasi-co-location (QCL) properties.

[0011] In yet another exemplary embodiment, an apparatus configured or operable to perform the methods described above is disclosed. The apparatus may include a processor configured to implement the methods described above.

[0012] In another exemplary embodiment, the above-described method is embodied in processor-executable code and stored in a non-transitory computer-readable storage medium. When the processor executes the code contained in the computer-readable storage medium, the code causes the processor to implement the method described in this patent document.

[0013] The above and other aspects and their embodiments will be described in more detail in the accompanying drawings, specification and claims. Attached Figure Description

[0014] Figure 1 illustrates an exemplary beam-based transmission.

[0015] Figure 2 illustrates an exemplary Multiple Transmitter Receiver Point (MTRP) operation.

[0016] Figure 3 illustrates an exemplary method for determining the Transmission Configuration Indication (TCI) status.

[0017] Figure 4 illustrates an exemplary beam collision with a set of control resources in MTRP operation based on a single downlink control information (S-DCI).

[0018] Figure 5 illustrates an exemplary beam collision with the downlink (DL) signal during S-DCI-based MTRP operation.

[0019] Figure 6 illustrates an exemplary beam collision in MTRP operation based on multiple downlink control information (M-DCI).

[0020] Figure 7 is an exemplary flowchart for determining the TCI status.

[0021] Figure 8 is an exemplary flowchart for prioritizing the Physical Downlink Control Channel (PDCCH).

[0022] Figure 9 is an exemplary flowchart for determining quasi-co-located (QCL) attributes.

[0023] Figure 10 is an exemplary flowchart for transmitting the Physical Downlink Shared Channel (PDSCH).

[0024] Figure 11 is an exemplary flowchart for transmitting PDCCH.

[0025] Figure 12 is an exemplary flowchart for transmitting aperiodic channel state information reference signals (AP-CSI-RS).

[0026] Figure 13 shows an exemplary block diagram of a hardware platform that may be part of a network node or a wireless device.

[0027] Figure 14 illustrates an exemplary wireless communication including a base station (BS) and a user equipment (UE) based on some implementations of the disclosed technology. Detailed Implementation

[0028] The example headings in the following sections are used to facilitate understanding of the disclosed subject matter and do not limit the scope of the claimed subject matter in any way. Therefore, one or more features of one example section may be combined with one or more features of another example section. Furthermore, for clarity, the term "5G" is used; however, the technologies disclosed in this document are not limited to 5G technology and can be used in wireless systems implementing other protocols.

[0029] I. Introduction

[0030] In 5G New Radio (NR), analog beamforming is introduced into mobile communications for the first time to ensure the robustness of high-frequency communication. For downlink (DL) transmission, a Quasi-Co-location (QCL) state (also known as Transmission Configuration Indication (TCI) state or beamforming state) is introduced to support beamforming of the DL control channel (i.e., Physical Downlink Control Channel (PDCCH)), DL data channel (i.e., Physical Downlink Shared Channel (PDSCH)), and Channel State Information Reference Signaling (CSI-RS). Similarly, for uplink (UL) transmission, spatial relation information (from a technical documentation perspective, the corresponding higher-layer parameter is called spatialRelationInfo) is introduced to support beamforming of the UL control channel (i.e., Physical Uplink Control Channel (PUCCH)) and Sounding Reference Signal (SRS). Furthermore, beamforming of the UL data channel (i.e., Physical Uplink Shared Channel (PUSCH)) is achieved by mapping one or more SRS resources indicated by the gNodeB (gNB) and the port of the UL data channel. This means that the beam configuration of the UL data channel can be derived accordingly from the spatial relationship information associated with SRS resources or ports. Then, a unified TCI architecture is introduced, on which a single TCI state can be applied to two or any one of DL signaling (e.g., PDSCH, PDCCH and / or CSI-RS) and UL signaling (e.g., PUSCH, PUCCH and / or SRS) to determine one or more corresponding transmit / receive (Tx / Rx) beams.

[0031] Subsequently, as a further development of the unified TCI architecture, it can be extended to operation based on multiple transmit receiver points (MTRPs). In short, the first and second TCI states corresponding to the first and second transmit receiver points (TRPs) can be indicated / activated via downlink control information (DCI) and media access control (MAC) control unit (MAC-CE), and then applied to the corresponding DL / UL channels / reference signals (RS) corresponding to different TRPs.

[0032] Although a unified TCI indication corresponding to the corresponding TRP can minimize the beam collision probability caused by individual TCI / spatial relationship updates of individual DL / UL channels / RS, beam collisions of DL channels / RS still exist in the unified TCI architecture of MTRP operation for the following situations: PDSCH / aperiodic CSI-RS (AP-CSI-RS) with scheduling / trigger offset < threshold + other DL signals. Specifically, we need to address the following issues to improve the flexibility of gNB scheduling, even under the constraints of analog beam switching.

[0033] 1) Considering that the collision rules are highly correlated with the user equipment (UE) behavior for other DL signals, we need to identify the type of the corresponding DL signal, namely Type-A: normal DL signal, such as periodic / semi-static CSI-RS (P / SP-CSI-RS), PDSCH with scheduling offset > threshold; Type-B: AP-CSI-RS, such as AP-CSI-RS with scheduling offset > threshold, and then AP-CSI-RS is configured to have repetition or not. For example, if AP-CSI-RS is configured with repetition = off, it is assumed that the UE does not need to change its Rx beam when initiating gNB-side beam scanning.

[0034] 2) Next, we need to consider the different UE behaviors that enable this functionality: For example, a UE can receive PDSCH / AP-CSI-RS with a scheduling offset < threshold using two default beams (i.e., the indicated TCI states). For example, if the UE can support two default beams (e.g., the UE supports two default beams based on a single DCI (S-DCI) MTRP within frequency range 2 (FR2), we can assume that when an AP-CSI-RS with a scheduling offset < threshold collides with a PDSCH with two indicated TCI states, no additional rules are needed; otherwise, only one type of TCI state (i.e., the first TCI state) can be applied to AP-CSI-RS reception.

[0035] 3) Finally, the thresholds mentioned above may be PDSCH / CSI-RS specific or CSI-RS with repeat=on / off (i.e., introducing new thresholds / threshold combinations or reusing traditional thresholds (such as those in NR Rel-15 / 16)). For thresholds with repeat=on (on), this means that the UE may need to activate the idle mode panel for subsequent beam training.

[0036] As a trade-off for wide or ultra-wide spectrum resources, the considerable propagation loss at extremely high frequencies presents a significant challenge. To address this, antenna arrays using massively multi-input multiple-output (MIMO) architectures (e.g., up to 1024 antenna elements per node) and beamforming training techniques can be tailored to achieve beam alignment and sufficiently high antenna gain. To benefit from antenna arrays while maintaining low implementation costs, analog phase shifters become very attractive for implementing millimeter-wave beamforming, implying a finite number of controllable phases and constant-mode constraints imposed on these antenna elements. Given a pre-specified beam pattern, the training objective of variable-phase-shift-based beamforming (BF) is typically to identify the optimal pattern for subsequent data transmission in a TRP and panel configuration.

[0037] Figure 1 illustrates beam-based UL / DL transmission, where solid lines represent the selected Tx / Rx beams used for transmission.

[0038] It should be noted that in this patent document, the definition of "TCI state" is equivalent to Quasi-Co-location (QCL) state, Transmission Configuration Indication (TCI) state, Spatial Relationship (also known as Spatial Relationship Information), Reference Signal (RS), Spatial Filter, or Precoding. Furthermore, in this patent document, "TCI state" is also referred to as "beam" or "beam state." Additionally, in this patent document, "TCI state" is equivalent to "Indicated TCI state." Furthermore, in this patent document, "TCI state" is equivalent to "Joint / DL TCI state," "TCI state," or "DL TCI state."

[0039] Specifically:

[0040] a) The definition of “Tx beam” is equivalent to QCL state, TCI state, spatial relationship state, DL reference signal, UL reference signal, Tx spatial filter or Tx precoding;

[0041] b) The definition of “Rx beam” is equivalent to QCL state, TCI state, spatial relation state, spatial filter, Rx spatial filter or Rx precoding;

[0042] c) The definition of “beam ID” is equivalent to QCL state index, TCI state index, spatial relationship state index, reference signal index, spatial filter index, or precoding index.

[0043] Specifically, spatial filters can be filters on the UE side or gNB side, and spatial filters are also known as spatial domain filters.

[0044] It should be noted that in this patent document, "spatial relationship information" includes one or more reference RSs, which are used to indicate the same or quasi-spatial relationship between the target "RS or channel" and one or more reference RSs.

[0045] It should be noted that in this patent document, "spatial relationship" refers to beam, spatial parameters, or spatial domain filters.

[0046] It should be noted that in this patent document, “TCI state” includes one or more reference RS and their corresponding QCL type parameters, wherein the QCL type parameters include at least one of the following aspects or combinations: [1] Doppler spread, [2] Doppler frequency shift, [3] delay spread spectrum, [4] average delay, [5] average gain and [6] spatial parameters (also referred to as spatial Rx parameters). In this patent document, “TCI state” is equivalent to “QCL ​​state”. In this patent document, “QCL-Type A”, “QCL-Type B”, “QCL-Type C” and “QCL-Type D” are defined as follows:

[0047] "QCL-Type A": {Doppler frequency shift, Doppler spread, average delay, delay spread}

[0048] "QCL-Type B": {Doppler frequency shift, Doppler spread}

[0049] "QCL-Type C": {Doppler frequency shift, average delay}

[0050] “QCL-Type D”: {Spatial Rx parameter}

[0051] It should be noted that in this patent document, RS includes Channel State Information Reference Signal (CSI-RS), Synchronization Signal Block (SSB) (also known as SS / Physical Broadcast Channel (PBCH)), Demodulation Reference Signal (DMRS), Probe Reference Signal (SRS), and Physical Random Access Channel (PRACH). Furthermore, RS includes at least DL Reference Signal and UL Reference Signaling.

[0052] DL RS includes at least CSI-RS, SSB, and DMRS (e.g., DL DMRS).

[0053] UL RS includes at least SRS, DMRS (e.g., UL DMRS) and PRACH.

[0054] It should be noted that in this patent document, "UL signal" can be PUCCH, PUSCH, or SRS.

[0055] It should be noted that in this patent document, "DL signal" can be PDCCH, PDSCH, or CSI-RS.

[0056] It should be noted that in this patent document, "time unit" can be a sub-symbol, symbol, time slot, subframe, frame, or transmission timing.

[0057] It should be noted that in this patent document, the CSI-RS used for CSI is equivalent to the CSI-RS without high-level parameter repetition and trs-Info configured.

[0058] It should be noted that in this patent document, the CSI-RS used for tracking is equivalent to a CSI-RS configured with high-level parameters and trs-Info.

[0059] It should be noted that in this patent document, the CSI-RS used for beam management is equivalent to a CSI-RS configured with repeated high-level parameters.

[0060] It should be noted that in this patent document, PDCCH is equivalent to DCI or DCI format.

[0061] It should be noted that in this patent document, the first TCI state is equivalent to the TCI state specific to the coresetPoolIndex value 0. Furthermore, the first indicated TCI state is equivalent to the indicated TCI state specific to the coresetPoolIndex value 0.

[0062] It should be noted that in this patent document, the second TCI state is equivalent to the TCI state specific to the coresetPoolIndex value 1. Furthermore, the second indicated TCI state is equivalent to the indicated TCI state specific to the coresetPoolIndex value 1.

[0063] It should be noted that in this patent document, "the device does not report its supported capabilities" is equivalent to "the device does not support them".

[0064] II. Example 1

[0065] Determine the default TCI state for PDSCH and aperiodic CSI-RS when the scheduling / trigger offset is less than the threshold.

[0066] When extending the unified TCI to MTRP operation, there are two indicated TCI states instead of the single indicated TCI state in a single Transmit Receive Point (STRP) operation. Figure 2 illustrates the extension of the unified TCI to MTRP operation using two indicated TCI states. As shown in Figure 2, the first TCI state and the second TCI state correspond to TRP-1 and TRP-2, respectively, and then, for a given DL transmission, one or both of these first and second TCI states should be applied according to specified rules.

[0067] In the next section, we first clarify the rules for determining one or both of the first TCI state and the second TCI state for a PDSCH with a scheduling offset < threshold or a CSI-RS with a trigger offset < threshold.

[0068] For PDSCH with scheduling offset < threshold

[0069] For MTRP operations based on a single DCI (S-DCI), there are two indicated TCI states (there is no coresetPoolIndex associated with the control resource set (CORESET)).

[0070] If the UE is in frequency range 1, or the UE reports its ability to support two default beams in frequency range 2 (i.e., the UE can support two default beams) (e.g., for S-DCI based MTRP).

[0071] For PDSCH scheduling via DCI format 1_0, the UE should apply the first, second, or both TCI states based on the RRC parameter (e.g., applyIndicatedTCIState). As with the default mode, if not configured, the first TCI state should be applied.

[0072] For PDSCH scheduled via DCI format 1_1 / 2, the UE should apply the first, second, or both TCI states according to the TCI selection field in DCI format 1_1 / 2. If the TCI selection field does not exist in the DCI format, the UE should apply both TCI states in this case.

[0073] Otherwise (i.e., the UE does not report its ability to use two default beams, for example, for S-DCI-based MTRP), the UE should apply the first indicated TCI state (regardless of whether the PDSCH is scheduled by DCI format 0_0 / 1 / 2).

[0074] For MTRP operations based on multiple DCIs (M-DCI), that is, there is a coresetPoolIndex associated with CORESET (e.g., there are two different coresetPoolIndex values ​​in different ControlResourceSets).

[0075] It should be noted that, in principle, for a PDSCH scheduled by a CORESET with a coresetPoolIndex, the UE should apply the TCI state corresponding to the same coresetPoolIndex. However, there may be some specific situations that need to be clarified as follows.

[0076] If the UE is in frequency range 1, or the UE reports its ability to support two default beams in frequency range 2 (i.e., the UE can support two default beams) (e.g., for M-DCI based MTRP).

[0077] Regardless of whether the PDSCH is scheduled by DCI format 0_0 / 1 / 2, for a PDSCH scheduled by a PDCCH in a CORESET with a coresetPoolIndex, the UE should apply the TCI state corresponding to the same coresetPoolIndex.

[0078] Otherwise (i.e., the UE does not report its ability to use two default beams, for example, for S-DCI-based MTRP), the UE should apply the first indicated TCI state (regardless of whether the PDSCH is scheduled by DCI format 0_0 / 1 / 2).

[0079] The first indicated TCI state corresponds to the indicated TCI state specific to the coresetPoolIndex value.

[0080] In addition, in this case, we have at least one of the following additional requirements:

[0081] A PDSCH with a scheduling offset less than a threshold can be scheduled by a PDCCH in a CORESET with a specific coresetPoolIndex (e.g., coresetPoolIndex=0).

[0082] The case where a PDSCH with a scheduling offset less than a threshold is excluded from scheduling by a PDCCH in a CORESET with another specific coresetPoolIndex (e.g., coresetPoolIndex=1).

[0083] In addition to the PDSCH rule, we also need to establish another rule for AP-CSI-RS where the trigger offset is less than the threshold. It should be noted that the thresholds for AP-CSI-RS and PDSCH can be the same or different, and further details are discussed in Example #4.

[0084] Furthermore, if the offset between the scheduled / activated DCI format 1_0 / 1_1 / 1_2 reception and the scheduled or activated PDSCH reception is less than a threshold within frequency range 2, the UE should apply the TCI state indicated by the coresetPoolIndex value 0 to the scheduled or activated PDSCH reception.

[0085] In this case, there exists a coresetPoolIndex associated with CORESET.

[0086] Furthermore, the UE does not expect the offset between the reception of the scheduled / activated DCI format 1_0 / 1_1 / 1_2 associated with the coresetPoolIndex value 1 and the scheduled or activated PDSCH reception to be less than a threshold within frequency range 2.

[0087] In this case, there exists a coresetPoolIndex associated with CORESET.

[0088] For AP-CSI-RS with trigger offset < threshold.

[0089] For S-DCI-based MTRP operations, there are two indicated TCI states (there is no coresetPoolIndex associated with CORESET).

[0090] If the UE is in frequency range 1, or the UE reports its ability to support two default beams in frequency range 2 (i.e., the UE can support two default beams) (e.g., for S-DCI based MTRP).

[0091] The UE shall apply the first or second TCI state to the aperiodic CSI-RS according to one or more higher-level configurations provided to the AP-CSI-RS resource or the aperiodic CSI-RS resource set.

[0092] Otherwise (i.e., the UE does not report its ability to use two default beams, for example, for S-DCI-based MTRP), the UE should apply the first TCI state to AP-CSI-RS.

[0093] For MTRP operations based on M-DCI, there exists a coresetPoolIndex associated with a control resource set (CORESET) (e.g., there are two different coresetPoolIndex values ​​in different CORESETs).

[0094] If the UE is in frequency range 1, or the UE reports its ability to support two default beams in frequency range 2 (i.e., the UE can support two default beams) (e.g., for M-DCI based MTRP).

[0095] The UE shall apply the first or second TCI state to AP-CSI-RS according to one or more higher-level configurations provided to the aperiodic CSI-RS resource or the aperiodic CSI resource set.

[0096] Otherwise (i.e., the UE does not report its ability to use two default beams, e.g. for S-DCI-based MTRP), the UE should apply the joint / DL TCI state indicated by the specific coresetPoolIndex (e.g., coresetPoolIndex=0) to the aperiodic CSI-RS resource set.

[0097] If the QCL-Type D attributes of the component carriers (CCs) in the frequency band are different, the above one or more TCI states of the CC with the lowest ID are prioritized, that is, the default beam of the CC with the lowest ID will be applied to all CCs in the frequency band.

[0098] Figure 3 illustrates one or both of the first and second TCI states (i.e., default beam rules) for determining PDSCH / CSI-RS with an offset < threshold. For example, as shown in Figure 3, we have the following example of an S-DCI-based MTRP, where we consider two typical cases: Case #1, for an S-DCI-based MTRP, the UE has the capability to support two default beams in FR2 or PDSCH / AP-CSI-RS transmission in FR1; Case #2, for an S-DCI-based MTRP, the UE does not support the capability of two default beams in FR2, i.e., only one default beam is supported. Based on the above rules, we performed the following analysis.

[0099] In case #1, for PDSCH scheduled by DCI format 1_1, where the “TCI selection field” in DCI format 1_1 indicates two TCI states, the UE should use these two TCI states to schedule subsequent PDSCH transmissions with offset < threshold; then, for AP-CSI-RS, following the first or second TCI state is configured via Radio Resource Control (RRC) parameters, and if AP-CSI-RS is configured to “follow the second TCI state”, the UE should apply the second TCI state to AP-CSI-RS.

[0100] Then, in case #2, for PDSCH scheduled by DCI1_1, the UE should use the first TCI state for PDSCH reception regardless of the indication value of the "TCI selection field"; similarly, for AP-CSI-RS, the UE should directly use the first TCI state for AP-CSI-RS.

[0101] III. Example 2

[0102] Beam collision in MTRP based on S-DCI.

[0103] In this embodiment, we elaborate in detail the beam collision rules for PDSCH / AP-CSI-RS+ other DL signals with scheduling / triggering offsets less than a threshold in S-DCI-based MTRP operations (it should be noted that "S-DCI-based MTRP operations" are equivalent to the conditions of "the existence of two indicated TCI states" and / or "the absence of a coresetPoolIndex associated with CORESET").

[0104] For PDSCH with a scheduling offset less than the threshold, we consider the case of "PDSCH with a scheduling offset less than the threshold + CORESET / PDCCH", that is, other DL signals are CORESET / PDCCH.

[0105] If the PDSCH and PDCCH / CORESET overlap in at least one time unit (e.g., symbol / OFDM symbol), then the reception of the PDCCH takes precedence over the PDSCH.

[0106] Furthermore, in this case, one or more TCI states corresponding to PDCCH / CORESET are "outside the range of a specific TCI state" or "different from" a specific TCI state, or the "QCL-Type D" (i.e., the QCL-Type D assumption for DL ​​reception) of one or more specific TCI states (e.g., the first or second TCI state corresponding to PDSCH) is different from this.

[0107] Furthermore, if the UE is in frequency range 1, or the UE reports its ability to support two default beams in frequency range 2 (i.e., the UE can support two default beams) (e.g., for S-DCI-based MTRP), then a specific TCI state includes a first TCI state and a second TCI state.

[0108] Furthermore, “different from” includes combinations of TCI state / “QCL-Type D” (if more than one), or, for each TCI state or “QCL-Type D”, there is no identical TCI state and “QCL-Type D”.

[0109] Furthermore, in this case, the UE does not report its ability to use two default beams (i.e., the UE cannot support two default beams) (e.g., for S-DCI-based MTRP).

[0110] Figure 4 illustrates beam collisions of PDSCH + CORESET / PDCCH with scheduling offsets < threshold in S-DCI-based MTRP. For example, as shown in Figure 4, we have the following example where, in time slot n+1, there are two simultaneous transmissions of CORESET / PDCCH and PDSCH with scheduling offsets < threshold, based on the rules described above.

[0111] If the UE can report its ability to use two default beams, this means that one or more specific TCI states include both a first and a second TCI state, and the TCI state corresponding to the PDCCH / CORESET is not outside the range of the specific TCI state. Therefore, the PDSCH can be received well, and we do not need to specify any UE behavior that prioritizes the CORESET / PDCCH in slot n+2 transmission.

[0112] However, if the UE is unable to report its ability to use both default beams, meaning that one or more specific TCI states correspond to the first TCI state, then the TCI state of the CORESET / PDCCH (i.e., the second TCI state) differs from the specific TCI state. Therefore, in this case, PDCCH reception should take precedence over PDSCH.

[0113] Then, we further elaborate on the beam collision rules for AP-CSI-RS+ other DL signals with scheduling / trigger offsets less than a threshold in S-DCI-based MTRP operations (it should be noted that "S-DCI-based MTRP operations" is equivalent to the conditions of "the existence of two indicated TCI states" and / or "the absence of a coresetPoolIndex associated with CORESET").

[0114] When the UE has two indicated TCI states, the offset between the reception of the scheduled / activated DCI format 1_0 / 1_1 / 1_2 and the reception of the scheduled or activated PDSCH is less than a threshold, and if the PDSCH and PDCCH overlap in at least one symbol.

[0115] Furthermore, if the UE reports its ability to support two default beams (i.e., the two default beams of the MTRP based on S-DCI), and if one or more “QCL-Type D” corresponding to the PDCCH DMRS differs from either of the two indicated joint / DLTCI states, the UE is expected to prioritize the reception of the PDCCH.

[0116] Furthermore, if the UE does not report its two default beam capabilities (i.e., the two default beams of the MTRP based on S-DCI), and if one or more “QCL-Type D” corresponding to the PDSCH DMRS do not belong to the “QCL-Type D” of the PDCCH DMRS, the UE is expected to prioritize the reception of the PDCCH.

[0117] When the UE has two indicated TCI states, the offset between the reception of the scheduled / activated DCI format 1_0 / 1_1 / 1_2 and the reception of the scheduled or activated PDSCH is less than a threshold, and if the PDSCH and PDCCH overlap in at least one symbol.

[0118] Furthermore, if the UE reports its ability to use two default beams (i.e., the two default beams of the MTRP based on S-DCI), and if one or more “QCL-Type D” corresponding to the PDCCH DMRS are not from the two indicated joint / DL TCI states, the UE is expected to prioritize receiving the PDCCH.

[0119] Furthermore, if the UE does not report its two default beam capabilities (i.e., the two default beams of the MTRP based on S-DCI), and if the “QCL-Type D” corresponding to the PDSCH DMRS is different from any of the PDCCH DMRS, the UE is expected to prioritize the reception of the PDCCH.

[0120] For AP-CSI-RS with a trigger offset less than a threshold, we consider the case of "AP-CSI-RS trigger offset + other DL signals", where the DL signals can be divided into three categories: Type-1 DL signals that apply both the first TCI state and the second TCI state (e.g., PDSCH scheduled by DCI and applying both TCI states) and Type-2 DL signals that apply either the first or the second TCI state (e.g., P / SP-CSI-RS with RRC configuration that "follows the first DL signal"), and Type-3 DL signals that do not follow one or more indicated TCI states (i.e., one of the first or second TCI states) (e.g., TCI states configured separately without the first or second TCI state), or one or more indicated TCI states that have been applied.

[0121] Furthermore, if the AP-CSI-RS with the first TCI state and the second TCI state overlaps with the Type-1 DL signal in at least one time unit (e.g., symbol / OFDM symbol).

[0122] If the UE is in frequency range 1, or the UE reports its ability to use two default beams in frequency range 2 (i.e., the UE can support two default beams) (e.g., for S-DCI-based MTRP), then the following UE behavior (i.e., collision-free) mentioned in Example #1 is used.

[0123] The UE shall apply the first or second TCI state to the aperiodic CSI-RS according to one or more higher-level configurations provided to the AP-CSI-RS resource or the aperiodic CSI-RS resource set.

[0124] Otherwise (i.e., the UE does not report its ability to use two default beams, e.g., for S-DCI-based MTRP), at least one of the following should apply:

[0125] Option 1: The UE should apply the first TCI state to AP-CSI-RS (i.e., the same UE behavior mentioned in Implementation #1 (i.e., no collision)).

[0126] Option 2: The UE should apply the first or second TCI state to the aperiodic CSI-RS according to one or more higher-layer configurations provided to the AP-CSI-RS resource or the aperiodic CSI-RS resource set. It should be assumed that the UE has already used the first and second TCI states to buffer the DL signal.

[0127] In addition, the Type-1 DL signal includes a scheduling offset >= threshold and a PDSCH with a first TCI state and a second TCI state applied, or a PDCCH in the CORESET (e.g., following the first TCI state and the second TCI state).

[0128] Furthermore, if the AP-CSI-RS applying the first or second TCI state overlaps with the Type-2 DL signal in at least one time unit (e.g., symbol / OFDM symbol), at least one of the following should be considered:

[0129] Option 1: The UE should apply the TCI status of the Type-2 DL signal to the AP-CSI-RS;

[0130] Option 2: Determine the TCI status applied to AP-CSI-RS based on whether the UE is in FR1 or whether the UE reports its two default beams.

[0131] In addition, if the UE is within frequency range 1, or the UE reports its ability to use two default beams (i.e., the UE can support two default beams), then the following UE behavior (i.e., collision-free) mentioned in Example #1 is used.

[0132] The UE should apply the first or second TCI state to the aperiodic CSI-RS based on one or more higher-level configurations (e.g., RRC) provided to the AP-CSI-RS resource or the aperiodic CSI-RS resource set.

[0133] Otherwise (i.e., the UE does not report its ability to use two default beams, for example, for S-DCI-based MTRP), the UE should apply the TCI status of the Type-2 DL signal to AP-CSI-RS.

[0134] In addition, the Type-2 DL signal includes at least a PDSCH with a scheduling offset >= threshold, a periodic CSI-RS (P-CSI-RS), a semi-static CSI-RS (SP-CSI-RS), an aperiodic CSI-RS with a trigger offset >= threshold, or a PDCCH in the CORESET (e.g., following the indicated TCI state).

[0135] Furthermore, two corresponding thresholds may exist for different types of CSI-RS. For example, a first type of threshold is used for: CSI-RS for tracking, CSI-RS for CSI, and / or CSI-RS for beam management (also repeat = off); a second type of threshold is used for CSI-RS for beam management (repeat = on).

[0136] In addition, the first type threshold is reported by the UE, and then the second type threshold is fixed, for example, 48 symbols.

[0137] In addition to the PDSCH with two indicated TCI states, the Type-2 DL signal includes at least a PDSCH with a scheduling offset >= the threshold.

[0138] Furthermore, if the AP-CSI-RS overlaps with a Type-3 DL signal that does not follow one or more indications of TCI state (i.e., first or second TCI state) in at least one time unit (e.g., symbol / OFDM symbol), the UE should apply the TCI state of the Type-3 DL to the AP-CSI-RS.

[0139] Furthermore, if the Type-3 DL signal has more than one TCI state / QCL assumption, then the collision between the AP-CSI-RS and the Type-3 DL signal is excluded (i.e., the UE does not expect the AP-CSI-RS and the Type-3 DL signal to overlap in at least one time unit).

[0140] In addition, Type-3 DL signals include at least periodic CSI-RS (P-CSI-RS), semi-static CSI-RS (SP-CSI-RS), non-periodic CSI-RS with trigger offset >= threshold, or PDCCH in CORESET (e.g., TCI state that does not follow the indication).

[0141] Furthermore, when the UE has two indicated TCI states, and if the offset between the last symbol of the PDCCH that triggers DCI and the first symbol of the aperiodic CSI resource in the aperiodic CSI-RS resource set is less than a threshold:

[0142] Furthermore, if a DL signal exists in the same symbol as the non-periodic CSI-RS within frequency range 2.

[0143] Furthermore, if the UE reports its ability to have two default beams within frequency range 2, and if the DL signal is applied by either or both of the first and second indicated joint / DL TCI states, the UE shall apply the first or second indicated joint / DL TCI state to the aperiodic CSI-RS according to one or more higher-layer configurations provided to the aperiodic CSI-RS resource or the aperiodic CSI resource set.

[0144] Otherwise, the UE should apply the QCL assumptions for other DL signals to the aperiodic CSI-RS.

[0145] Furthermore, if there is no DL signal in the same symbol as the non-periodic CSI-RS within frequency range 2.

[0146] Furthermore, if the UE is in frequency range 1, or if the UE reports that it has the capability to have two default beams in frequency range 2, the UE should apply the first or second indicated joint / DL TCI state to the aperiodic CSI-RS according to one or more higher-layer configurations provided to the aperiodic CSI-RS resource or aperiodic CSI resource set.

[0147] Otherwise, the UE should apply the first indicated joint / DL TCI state to the aperiodic CSI-RS.

[0148] In addition, DL signals refer to PDSCH with scheduling offset greater than or equal to a threshold, periodic CSI-RS, semi-static CSI-RS, and / or non-periodic CSI-RS with scheduling offset greater than or equal to a threshold.

[0149] Figure 5 illustrates beam collisions of AP-CSI-RS with scheduling offset < threshold and other DL signals in S-DCI-based MTRP operations. For example, we have the following example as shown in Figure 5, where there is simultaneous transmission between CSI-RS with scheduling offset < threshold and other DL signals, including a PDSCH (i.e., Type-1 DL signal) with scheduling offset >= threshold and having a first TCI state and a second TCI state in time slot n, P-CSI-RS#1 (i.e., Type-2 DL signal) following the first TCI state (configured by RRC parameters) in time slot n+1, and P-CSI-RS#2 (i.e., Type-3 DL signal) not following the indicated TCI state. Based on the above rules, we derive the following points.

[0150] When a PDSCH with a scheduling offset >= threshold is transmitted simultaneously in slot n, if the UE reports the capability of its two default beams, then the second TCI state (configured by RRC) is applied to AP-CSI-RS; otherwise, we have two options: Option 1: Apply the first TCI state to AP-CSI-RS, or Option 2: Apply the second TCI state (configured by RRC) to AP-CSI-RS.

[0151] When transmitting simultaneously with P-CSI-RS#1 following the first TCI state in time slot n+1, if the UE reports the capability of its two default beams, the second TCI state (configured by RRC) is applied; otherwise, the first TCI state is applied to AP-CSI-RS.

[0152] When transmitted simultaneously with a P-CSI-RS#2 that is not in a TCI state, the TCI state of the P-CSI-RS#2 is applied to the AP-CSI-RS.

[0153] IV. Example 3

[0154] Beam collision in MTRP based on M-DCI.

[0155] In this embodiment, we elaborate on the beam collision rules for PDSCH / AP-CSI-RS + other DL signals with scheduling / trigger offsets less than a threshold in M-DCI-based MTRP operations (it should be noted that "M-DCI-based MTRP operation" is equivalent to the condition "there exists a coresetPoolIndex associated with the control resource set (CORESET) (e.g., there are two different coresetPoolIndex values ​​in different CORESETs)").

[0156] For PDSCH with a scheduling offset less than the threshold, we consider the case of "scheduling offset PDSCH + CORESET / PDCCH", that is, other DL signals are CORESET / PDCCH.

[0157] If the PDSCH and PDCCH / CORESET overlap in at least one time unit (e.g., symbol / OFDM symbol), and if the TCI state of the PDSCH corresponding to the coresetPoolIndex or the "QCL-Type D" of the TCI state (i.e., the QCL-Type D assumption for DL ​​reception) is different from the TCI state of the PDCCH / CORESET, then the reception of the PDCCH takes precedence over the PDSCH.

[0158] Furthermore, PDCCH / CORESET and PDSCH are associated with the same coresetPoolIndex or the same TCI state.

[0159] Furthermore, PDCCH / CORESET and PDSCH are associated with different coresetPoolIndex or different TCI states.

[0160] In addition, the UE is in FR2.

[0161] In addition, the UE does not report its ability to use two default beams, such as MTRP based on M-DCI.

[0162] For AP-CSI-RS with a trigger offset less than a threshold, we consider the case of "AP-CSI-RS trigger offset + other DL signals", where the DL signals can be divided into three categories: Type-1 DL signals associated with the AP-CSI-RS in the same TCI state (i.e., the same first TCI state or the same second TCI state) or the same coresetPoolIndex; Type-2 DL signals associated with the AP-CSI-RS in different types of TCI states or different coresetPoolIndex; and Type-3 DL signals that do not follow one or more indications of TCI state (i.e., the first or second TCI state) (e.g., configuring the TCI state separately instead of the first or second TCI state).

[0163] Furthermore, if the AP-CSI-RS overlaps with a Type-1 DL signal associated with the same TCI state (i.e., the same first TCI state or the same second TCI state) or the same coresetPoolIndex in at least one time unit (e.g., symbol / OFDM symbol),

[0164] If the UE is in frequency range 1, or the UE reports its ability to use two default beams in frequency range 2 (i.e., the UE can support two default beams) (e.g., for M-DCI-based MTRP), then the following UE behavior (i.e., collision-free) mentioned in Example #1 is used.

[0165] The UE shall apply the first or second TCI state to AP-CSI-RS according to one or more higher-level configurations provided to the aperiodic CSI-RS resource or the aperiodic CSI resource set.

[0166] Otherwise (i.e., the UE does not report its ability to use two default beams, for example, for M-DCI-based MTRP), the UE should apply the TCI state of the Type-1 DL signal to the AP-CSI-RS, or reuse the same UE behavior mentioned in Implementation #1.

[0167] In addition, the Type-1 DL signal includes at least a PDSCH with a scheduling offset >= threshold, a periodic CSI-RS (P-CSI-RS), a semi-static CSI-RS (SP-CSI-RS), an aperiodic CSI-RS with a trigger offset >= threshold, or a PDCCH in a CORESET (e.g., following the indicated TCI state).

[0168] Furthermore, two corresponding thresholds may exist for different types of CSI-RS. For example, a first type of threshold is used for: CSI-RS for tracking, CSI-RS for CSI, and / or CSI-RS for beam management (also repeat = off); a second type of threshold is used for CSI-RS for beam management (repeat = on).

[0169] In addition, the first type threshold is reported by the UE, and then the second type threshold is fixed, for example, 48 symbols.

[0170] Furthermore, if the AP-CSI-RS overlaps with a Type-2 DL signal associated with a different type of TCI state or a different coresetPoolIndex in at least one time unit (e.g., symbol / OFDM symbol), at least one of the following should be considered:

[0171] Option 1: The UE should apply the TCI status of the Type-2 DL signal to the AP-CSI-RS;

[0172] Option 2: Determine the TCI status applied to AP-CSI-RS based on whether the UE is in FR1 or whether the UE reports its two default beams.

[0173] In addition, if the UE is within frequency range 1, or the UE reports its ability to use two default beams (i.e., the UE can support two default beams), then the following UE behavior (i.e., collision-free) mentioned in Example #1 is used.

[0174] The UE shall apply the first or second TCI state to the aperiodic CSI-RS according to one or more higher-level configurations provided to the AP-CSI-RS resource or the aperiodic CSI-RS resource set.

[0175] Otherwise (i.e., the UE does not report its ability to use two default beams, for example, for MTRP based on M-DCI), the UE should apply the TCI status of the Type-2 DL signal to AP-CSI-RS.

[0176] In addition, the Type-2 DL signal includes at least a PDSCH with a scheduling offset >= threshold, a periodic CSI-RS (P-CSI-RS), a semi-static CSI-RS (SP-CSI-RS), an aperiodic CSI-RS with a trigger offset >= threshold, or a PDCCH in the CORESET (e.g., following the indicated TCI state).

[0177] Furthermore, two corresponding thresholds may exist for different types of CSI-RS. For example, a first type of threshold is used for: CSI-RS for tracking, CSI-RS for CSI, and / or CSI-RS for beam management (also repeat = off); a second type of threshold is used for CSI-RS for beam management (repeat = on).

[0178] In addition, the first type threshold is reported by the UE, and then the second type threshold is fixed, for example, 48 symbols.

[0179] In addition, the Type-2 DL signal includes at least a PDSCH with a scheduling offset >= the threshold, except for PDSCHs associated with the AP-CSI-RS in the same TCI state.

[0180] Furthermore, if the AP-CSI-RS overlaps with a Type-3 DL signal that does not follow one or more indications of TCI state (i.e., first or second TCI state) in at least one time unit (e.g., symbol / OFDM symbol), the UE should apply the TCI state of the Type-3 DL to the AP-CSI-RS.

[0181] In addition, Type-3 DL signals include at least periodic CSI-RS (P-CSI-RS), semi-static CSI-RS (SP-CSI-RS), non-periodic CSI-RS with trigger offset >= threshold, or PDCCH in CORESET (e.g., TCI state that does not follow the indication).

[0182] In short, we can merge Type-1 and Type-2 DL signals into a Type-A DL signal (i.e., with a first or second TCI state), and then we get the following rules:

[0183] Furthermore, if the AP-CSI-RS overlaps with (AP-CSI-RS) a Type-A DL signal associated with the first or second TCI state or a different coresetPoolIndex in at least one time unit (e.g., symbol / OFDM symbol), at least one of the following should be considered:

[0184] Option 1: The UE should apply the TCI status of the Type-A DL signal to the AP-CSI-RS;

[0185] Option 2: Determine the TCI status applied to AP-CSI-RS based on whether the UE is in FR1 or whether the UE reports its two default beams.

[0186] In addition, if the UE is within frequency range 1, or the UE reports its ability to use two default beams (i.e., the UE can support two default beams), then the following UE behavior (i.e., collision-free) mentioned in Example #1 is used.

[0187] The UE shall apply the first or second TCI state to the aperiodic CSI-RS according to one or more higher-level configurations provided to the AP-CSI-RS resource or the aperiodic CSI-RS resource set.

[0188] Otherwise (i.e., the UE does not report its ability to use two default beams, for example, for MTRP based on M-DCI), the UE should apply the TCI status of the Type-A DL signal to AP-CSI-RS.

[0189] In addition, the Type-A DL signal includes at least the PDSCH with a scheduling offset >= the threshold, periodic CSI-RS (P-CSI-RS), semi-static CSI-RS (SP-CSI-RS), and non-periodic CSI-RS with a trigger offset >= the threshold.

[0190] Furthermore, two corresponding thresholds may exist for different types of CSI-RS. For example, a first type of threshold is used for: CSI-RS for tracking, CSI-RS for CSI, and / or CSI-RS for beam management (also repeat = off); a second type of threshold is used for CSI-RS for beam management (repeat = on).

[0191] In addition, the first type threshold is reported by the UE, and then the second type threshold is fixed, for example, 48 symbols.

[0192] Figure 6 illustrates beam collisions of AP-CSI-RS with scheduling offset < threshold and other DL signals in M-DCI-based MTRP operation. For example, we have the following example as shown in Figure 6, where simultaneous transmission exists between CSI-RS with scheduling offset < threshold and other DL signals, including P-CSI-RS#1 (i.e., a Type-A DL signal or a Type-2 DL signal) that follows the first TCI state (configured by RRC parameters) in time slot n and P-CSI-RS#2 (i.e., a Type-3 DL signal) that does not follow the indicated TCI state. Based on the above rules, we derive the following points.

[0193] When transmitting simultaneously with P-CSI-RS#1 following the first TCI state in time slot n+1, if the UE reports the capability of its two default beams, the second TCI state (configured by RRC) is applied; otherwise, the first TCI state is applied to AP-CSI-RS.

[0194] When transmitted simultaneously with a P-CSI-RS#2 that is not in a TCI state, the TCI state of the P-CSI-RS#2 is applied to the AP-CSI-RS.

[0195] V. Example 4

[0196] UE capability report for PDSCH / CSI-RS related thresholds.

[0197] In this embodiment, we focus on UE capability reporting based on PDSCH / CSI-RS related thresholds. We then derive the following two candidate options:

[0198] Option 1: The UE can indicate the common threshold for PDSCH and CSI-RS.

[0199] For example, the candidate values ​​for the common threshold are {14, 28, 48}.

[0200] Option 2: The UE can indicate separate thresholds for PDSCH and CSI-RS.

[0201] In addition, the UE can indicate another threshold for CSI-RS (e.g., for CSI-RS used for beam management with repeat=on).

[0202] Another candidate value for the threshold could be {224, 336}, which is used to enable idle UE panels for further UE-side Rx beam scanning.

[0203] In addition, another threshold is reported by the UE, and then the threshold for the CSI-RS used for beam management (as a Type-II CSI-RS) for repeated = on is fixed, for example, 48 symbols.

[0204] In addition, for the reporting format in the corresponding UE capability signaling, for option 1, the UE can indicate a combination of {common threshold, another threshold of CSI-RS}, such as {14, 224}.

[0205] In this patent document, we propose a comprehensive method for handling beam collisions between downlink channels and RS during MTRP operations within a unified TCI architecture, thereby improving the flexibility of NW scheduling even considering beam switching delays (i.e., corresponding to thresholds). First, we provide specified default beam / TCI state determination rules for PDSCH with scheduling offset < threshold or AP-CSI-RS with trigger offset < threshold. Then, for MTRP operations based on S-DCI and M-DCI, we provide detailed rules for each if these two DL channels / signals are transmitted simultaneously with other DL signals in the same time unit. Finally, we provide a detailed analysis of UE capability reports for the corresponding PDSCH and CSI-RS thresholds.

[0206] Figure 7 is an exemplary flowchart for determining the TCI state. Operation 702 includes: receiving, by the wireless device, a Transmission Configuration Indication (TCI) state specific to a first indication of a first control resource set pool index and a TCI state specific to a second control resource set pool index. Operation 704 includes: receiving, by the wireless device, downlink control information (DCI) scheduling the Physical Downlink Shared Channel (PDSCH), wherein the DCI is associated with a control resource set pool index from the first control resource set pool index and the second control resource set pool index. Operation 706 includes: determining the TCI state of the PDSCH by the wireless device based on the DCI. In some embodiments, the method may be implemented according to Embodiment 1. In some embodiments, further steps of performing the method may be based on better system performance than conventional protocols.

[0207] In some embodiments, the scheduling offset between PDSCH and DCI is less than a threshold. In some embodiments, determining the TCI state includes applying an indication of the control resource set pool index associated with the DCI when the wireless device is in frequency range 1 or when the wireless device reports its ability to support more than one default beam in frequency range 2.

[0208] In some embodiments, when the wireless device is within frequency range 2, or the wireless device does not report its ability to support more than one default beam, at least one of the following applies: if the control resource set pool index associated with the DCI has a specific value (the specific value is "0"), or if the DCI is associated with a first control resource set pool index, then determining the TCI state includes the TCI state with the first indication applied; or if the first control resource set pool index and the control resource set pool index associated with the DCI have different values, then the PDSCH is unschedulable.

[0209] In some embodiments, when the scheduling offset between PDSCH and DCI is greater than or equal to a threshold, at least one of the following applies: DCI is associated with a second control resource pool index (e.g., the second control source pool index has a value of "1"); DCI is not associated with a first control resource pool index (e.g., the first control resource pool index has a value of "0"); or the control resource pool index associated with DCI has a specific value (e.g., the specific value is "1").

[0210] Figure 8 is an exemplary flowchart for prioritizing the Physical Downlink Control Channel (PDCCH). Operation 802 includes: receiving downlink control information (DCI) by a radio device to schedule the Physical Downlink Shared Channel (PDSCH), wherein the scheduling offset between the PDSCH and the DCI is less than a threshold. Operation 804 includes: prioritizing the reception of the Physical Downlink Control Channel (PDCCH) by a radio device, wherein the PDCCH and PDSCH overlap in at least one time unit. Operation 806 includes: receiving the PDCCH by a radio device. In some embodiments, the method may be implemented according to embodiments 2 and 3. In some embodiments, further steps of performing the method may be based on better system performance than conventional protocols.

[0211] In some embodiments, the method further includes: receiving a first indicated Transmission Configuration Indication (TCI) state and a second indicated TCI state by a wireless device, wherein one or more TCI states corresponding to the PDCCH are different from, do not originate from, do not belong to, or do not include one or more specific TCI states from the first indicated TCI state and the second indicated TCI state; wherein one or more TCI states corresponding to the PDCCH are different from any one of the first indicated TCI state and the second indicated TCI state; wherein the corresponding Quasi-Co-address (QCL-Type D) attribute of the PDCCH is different from, does not originate from, does not belong to, or does not include one or more specific TCI states from the first indicated TCI state and the second indicated TCI state; or wherein the QCL-Type D attribute corresponding to the PDCCH is different from, does not originate from, does not belong to, or does not include the QCL-Type D attribute corresponding to one or more specific TCI states from the first indicated TCI state and the second indicated TCI state.

[0212] In some embodiments, when the wireless device is within frequency range 1, or when the wireless device reports its ability to support more than one default beam within frequency range 2, one or more specific TCI states include both a first indicated TCI state and a second indicated TCI state. In some embodiments, one or more specific TCI states from the first indicated TCI state and the second indicated TCI state are applied to the PDSCH, either when the wireless device is within frequency range 2, or when the wireless device does not report its ability to support more than one default beam.

[0213] In some embodiments, the quasi-colocation type D (QCL-Type D) attribute corresponding to PDCCH is different from, does not come from, does not belong to, or does not include the QCL-Type D attribute corresponding to PDSCH, the QCL-Type D attribute corresponding to PDCCH is different from any QCL-Type D attribute corresponding to PDSCH, or wherein the QCL-Type D attribute corresponding to PDSCH is different from any QCL-Type D attribute corresponding to PDCCH.

[0214] In some embodiments, the PDCCH is associated with a control resource set pool index, and the Transport Configuration Indication (TCI) status or Quasi-Co-location Type D (QCL-Type D) attribute of the PDSCH is different from that of the PDCCH.

[0215] In some embodiments, the Transmission Configuration Indication (TCI) state of the PDCCH corresponds to the same Control Resource Set Pool Index as the PDSCH. In some embodiments, the Transmission Configuration Indication (TCI) state of the PDCCH corresponds to a different Control Resource Set Pool Index than the PDSCH. In some embodiments, the wireless device is in frequency range 2, or the wireless device does not report its ability to support more than one default beam.

[0216] Figure 9 is an exemplary flowchart for determining quasi-co-location (QCL) attributes. Operation 902 includes receiving a downlink (DL) signal by a wireless device. Operation 904 includes receiving downlink control information (DCI) that triggers an aperiodic channel state information reference signal (AP-CSI-RS) by the wireless device, wherein the trigger offset between the AP-CSI-RS and the DCI is less than a threshold, and wherein the AP-CSI-RS and the DL signal overlap in at least one time unit. Operation 906 includes determining the quasi-co-location (QCL) attribute of the AP-CSI-RS by the wireless device based on the DL signal. In some embodiments, the method may be implemented according to embodiments 2 and 3. In some embodiments, further steps of performing the method may be based on better system performance than conventional protocols.

[0217] In some embodiments, at least one of the following applies: one or more Transmission Configuration Indication (TCI) states corresponding to the DL signal are different from or do not include a specific TCI state provided to the AP-CSI-RS by a higher-layer configuration indication; one or more QCL attributes corresponding to the DL signal are different from or do not include the QCL attributes of the AP-CSI-RS; or one or more TCI states corresponding to the DL signal are different from or do not include the TCI states corresponding to the AP-CSI-RS.

[0218] In some embodiments, at least one of the following applies: the DCI is associated with the control resource pool index; or the control resource pool index associated with the DL signal and the control resource pool index associated with the AP-CSI-RS have different values.

[0219] In some embodiments, the method further includes: receiving a first indicated Transmission Configuration Indication (TCI) state and a second indicated TCI state by a wireless device, wherein the DL signal includes one of a Type-1 DL signal, a Type-2 DL signal, or a Type-3 DL signal.

[0220] In some embodiments, the Type-1 DL signal applies both the first indicated TCI state and the second indicated TCI state, the Type-2 DL signal applies either the first indicated TCI state or the second indicated TCI state, and the Type-3 DL signal does not apply or does not follow the indicated TCI state.

[0221] In some embodiments, the Type-1 DL signal includes one or more of the following: a Physical Downlink Shared Channel (PDSCH), wherein the scheduling offset of the PDSCH is greater than or equal to a threshold; or a Physical Downlink Control Channel (PDCCH) in a control resource set.

[0222] In some embodiments, the Type-2 DL signal includes one or more of the following: a Physical Downlink Shared Channel (PDSCH), wherein the scheduling offset of the PDSCH is greater than or equal to a first threshold; an Additional PDSCH, unless the Additional PDSCH has two indicated TCI states; a Periodic Channel State Information Reference Signal (P-CSI-RS); a Semi-Static Channel State Information Reference Signal (SP-CSI-RS); an Additional AP-CSI-RS, wherein the trigger offset of the Additional AP-CSI-RS is greater than or equal to a second threshold; or a Physical Downlink Control Channel (PDCCH) in a control resource set.

[0223] In some embodiments, the Type-3 DL signal includes one or more of the following: periodic channel state information reference signal (P-CSI-RS); semi-static channel state information reference signal (SP-CSI-RS); additional AP-CSI-RS, wherein the trigger offset of the additional AP-CSI-RS is greater than or equal to a threshold; or physical downlink control channel (PDCCH) in the control resource set.

[0224] In some embodiments, when the DL signal includes a Type-1 DL signal, when the wireless device is in frequency range 1, or when the wireless device reports its ability to support more than one default beam in frequency range 2, determining the QCL attribute includes either a TCI state with a first indication or a TCI state with a second indication, based on the higher-level configuration provided to the AP-CSI-RS.

[0225] In some embodiments, when the DL signal includes a Type-1 DL signal, when the wireless device is within frequency range 2, or when the wireless device does not report its ability to support more than one default beam, at least one of the following applies: determining that the QCL attribute includes a TCI state with a first indication; determining that the QCL attribute includes a TCI state with a Type-1 DL signal or a QCL attribute; or determining that the QCL attribute includes one of a TCI state with a first indication or a TCI state with a second indication, based on the higher-level configuration provided to the AP-CSI-RS.

[0226] In some embodiments, where the DL signal includes a Type-2 DL signal, at least one of the following applies: determining the QCL attribute includes the TCI state or QCL attribute of the DL signal applied in Type-2; or determining the QCL attribute based on whether the wireless device is within frequency range 1 or whether the wireless device reports its ability to support more than one default beam.

[0227] In some embodiments, when the wireless device is in frequency range 1, or when the wireless device reports its ability to support more than one default beam in frequency range 2, determining the QCL attribute includes applying one of a first indicated TCI state or a second indicated TCI state based on the higher-level configuration provided to the AP-CSI-RS.

[0228] In some embodiments, when the wireless device is in frequency range 2, or when the wireless device does not report its ability to support more than one default beam, determining the QCL attribute includes the TCI state or QCL attribute of the applied Type-2 DL signal.

[0229] In some embodiments, when the DL signal includes a Type-3 DL signal, determining the QCL attribute includes either the TCI state of the applied Type-3 DL or the QCL attribute.

[0230] In some embodiments, if the DL signal includes more than one TCI state or QCL attribute, the overlap between the AP-CSI-RS and the DL signal in at least one time unit is excluded.

[0231] In some embodiments, if the scheduling offset between PDSCH and DCI is less than a first threshold, and the trigger offset between AP-CSI-RS and DCI is less than a second threshold, the wireless device indicates a common threshold for the first and second thresholds, or the wireless device indicates different thresholds for the first and second thresholds. In some embodiments, the first threshold among the different thresholds is a value indicated by the wireless device, and the second threshold among the different thresholds is a fixed value or a value specified by the wireless device.

[0232] Figure 10 is an exemplary flowchart for transmitting PDSCH. Operation 1002 includes: transmitting by a network node a Transmission Configuration Indication (TCI) state specific to a first indication of a first control resource set pool index and a TCI state specific to a second control resource set pool index. Operation 1004 includes: transmitting by a network node downlink control information (DCI) for scheduling the Physical Downlink Shared Channel (PDSCH), wherein the DCI is associated with a control resource set pool index from the first control resource set pool index and the second control resource set pool index. Operation 1006 includes: transmitting by a network node, based on the DCI and according to the TCI state. In some embodiments, the method may be implemented according to Embodiment 1. In some embodiments, further steps of performing the method may be based on better system performance than conventional protocols.

[0233] Figure 11 is an exemplary flowchart for transmitting the PDCCH. Operation 1102 includes: transmitting downlink control information (DCI) for scheduling the Physical Downlink Shared Channel (PDSCH) by a network node, wherein the scheduling offset between the PDSCH and the DCI is less than a threshold. Operation 1104 includes: prioritizing the transmission of the Physical Downlink Control Channel (PDCCH) by a network node, wherein the PDCCH and PDSCH overlap in at least one time unit. Operation 1106 includes: transmitting the PDCCH by a network node. In some embodiments, the method may be implemented according to embodiments 2 and 3. In some embodiments, further steps of performing the method may be based on better system performance than conventional protocols.

[0234] In some embodiments, the method further includes: transmitting a first indicated Transmission Configuration Indication (TCI) state and a second indicated TCI state from a network node to a wireless device, wherein one or more specific TCI states from the first indicated TCI state and the second indicated TCI state are applied to the PDSCH, and wherein one or more TCI states corresponding to the PDCCH are different from, do not originate from, do not belong to, or do not include one or more specific TCI states.

[0235] In some embodiments, when the wireless device is in frequency range 1, or when the wireless device reports its ability to support more than one default beam in frequency range 2, one or more specific TCI states include both a first indicated TCI state and a second indicated TCI state.

[0236] In some embodiments, the wireless device is in frequency range 2, or the wireless device does not report its ability to support more than one default beam.

[0237] Figure 12 is an exemplary flowchart for transmitting AP-CSI-RS. Operation 1202 includes: transmitting downlink (DL) signals by a network node. Operation 1204 includes: transmitting downlink control information (DCI) that triggers an aperiodic channel state information reference signal (AP-CSI-RS) by a network node, wherein the trigger offset between AP-CSI-RS and DCI is less than a threshold, and wherein AP-CSI-RS and DL signals overlap in at least one time unit. Operation 1206 includes: transmitting AP-CSI-RS by a network node based on the DL signals, according to quasi-co-location (QCL) attributes. In some embodiments, the method may be implemented according to embodiments 2 and 3. In some embodiments, further steps of performing the method may be based on better system performance than conventional protocols.

[0238] In some embodiments, the method further includes: transmitting a first indicated Transmission Configuration Indication (TCI) state and a second indicated TCI state by a network node and a wireless device, wherein the DL signal includes one of a Type-1 DL signal, a Type-2 DL signal, or a Type-3 DL signal.

[0239] In some embodiments, where the DL signal includes a Type-1 DL signal, where the wireless device is in frequency range 1, or where the wireless device reports its ability to support more than one default beam in frequency range 2, the receive QCL attribute includes applying one of a first indicated TCI state or a second indicated TCI state according to the higher-level configuration provided to the AP-CSI-RS.

[0240] In some embodiments, when the DL signal includes a Type-1 DL signal, when the wireless device is within frequency range 2, or when the wireless device does not report its ability to support more than one default beam, at least one of the following applies: receiving QCL attributes includes a TCI state with a first indication; or receiving QCL attributes includes either a TCI state with a first indication or a TCI state with a second indication, based on a higher-level configuration provided to the AP-CSI-RS.

[0241] In some embodiments, where the DL signal includes a Type-2 DL signal, at least one of the following applies: receiving QCL attributes including the TCI state or QCL attribute of the DL signal applied in Type-2; or receiving QCL attributes based on whether the wireless device is within frequency range 1 or whether the wireless device reports its ability to support more than one default beam.

[0242] In some embodiments, where the DL signal includes a Type-3 DL signal, receiving the QCL attribute includes the TCI state of applying the Type-3 DL or the QCL attribute.

[0243] Figure 13 illustrates an exemplary block diagram of a hardware platform 1300, which may be part of a network node (e.g., a base station, transmission parameters, or TRP) or a wireless device (e.g., a user equipment (UE)). The hardware platform 1300 includes at least one processor 1310 and a memory 1305 having instructions stored thereon. Instructions executed by the processor 1310 configure the hardware platform 1300 to perform the operations shown in Figures 1 through 12 and in the various embodiments described in this patent document. A transmitter 1315 transmits or sends information or data to another device. For example, a network node transmitter is capable of sending a message to a user equipment. A receiver 1320 receives information or data transmitted or sent by another device. For example, a user equipment is capable of receiving a message from a network device. For example, as described in this document, a UE or network node may be implemented using the hardware platform 1300.

[0244] The above implementation scheme is applicable to wireless communication. Figure 14 illustrates an example of a wireless communication system (e.g., a 5G or NR cellular network) including a base station 1420 and one or more user equipments (UEs) 1411, 1412, and 1413. In some embodiments, the UE uses a communication link to the network (sometimes referred to as the uplink direction, as depicted by dashed arrows 1431, 1432, and 1433) to access the BS (e.g., the network, TRP), which subsequently enables subsequent communication from the BS to the UE (e.g., shown in the direction from the network to the UE, sometimes referred to as the downlink direction, as shown by arrows 1441, 1442, and 1443). In some embodiments, the BS sends information to the UE (sometimes referred to as the downlink direction, as depicted by arrows 1441, 1442, and 1443), which subsequently enables subsequent communication from the UE to the BS (e.g., shown in the direction from the UE to the BS, sometimes referred to as the uplink direction, as shown by dashed arrows 1431, 1432, and 1433). The UE can be, for example, a smartphone, tablet, mobile computer, machine-to-machine (M2M) device, Internet of Things (IoT) device, etc. The UE described in this document can be communicatively coupled to the base station 1420 depicted in Figure 14. The UE can also communicate with the BS via PDSCH, PDCCH, DCI, DL signals, CSI, CSI-RS, QCL attributes, or TCI status.

[0245] Those skilled in the art will understand that this document discloses methods for determining the TCI state of a PDSCH and the QCL attributes of an AP CSI-RS. More specifically, this patent document discloses methods in which a wireless device receives DCI or DL ​​signals from different TRPs, obtains a PDCCH associated with a specific control resource set pool index, and determines the TCI state and QCL attributes.

[0246] Some embodiments described herein are described in the general context of methods or processes that may be implemented in one embodiment by a computer program product embodied in a computer-readable medium, including computer-executable instructions, such as program code, that are executed by a computer in a networked environment. Computer-readable media may include removable and non-removable storage devices, including but not limited to read-only memory (ROM), random access memory (RAM), optical disc (CD), digital versatile optical disc (DVD), etc. Therefore, computer-readable media may include non-transitory storage media. Generally, program modules may include routines, programs, objects, components, data structures, etc., that perform a specific task or implement a specific abstract data type. Computer or processor-executable instructions, associated data structures, and program modules represent examples of program code for performing steps of the methods disclosed herein. A particular sequence of such executable instructions or associated data structures represents examples of corresponding behaviors for implementing the functions described in these steps or processes.

[0247] Some of the disclosed embodiments can be implemented using devices or modules of hardware circuitry, software, or a combination thereof. For example, hardware circuitry implementations can include discrete analog and / or digital components, integrated, for example, as part of a printed circuit board. Alternatively or additionally, the disclosed components or modules can be implemented as application-specific integrated circuits (ASICs) and / or field-programmable gate arrays (FPGAs). Some implementations additionally or alternatively include digital signal processors (DSPs), which are special-purpose microprocessors whose architecture is optimized for the operational requirements of digital signal processing related to the functions disclosed herein. Similarly, various components or sub-components within each module can be implemented in software, hardware, or firmware. Connections between modules and / or components within modules can be provided using any of the connection methods and media known in the art, including but not limited to communication via the Internet, wired, or wireless networks using appropriate protocols.

[0248] Although this document contains numerous details, these details should not be construed as limiting the scope of the claimed invention or the content that may be claimed, but rather as descriptions of specific features of particular embodiments. Some features described herein in the context of individual embodiments can also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment can also be implemented individually or in any suitable sub-combination in multiple embodiments. Furthermore, although the foregoing features may be described as operating in a particular combination, and even initially claimed to be so, in certain circumstances it is possible to remove one or more features from the claimed combination, and the claimed combination may be for sub-combinations or variations thereof. Similarly, although operations are depicted in a specific order in the drawings, this should not be construed as requiring these operations to be performed in the specific order or sequence shown, or requiring all illustrated operations to achieve the desired result.

[0249] Only some implementation methods and examples have been described. Other implementation methods, improvements and variations can be made based on the content described and explained in this patent document.

Claims

1. A wireless communication method, the method comprising: The wireless device receives a Transmission Configuration Indication (TCI) state specific to a first indication of a first Control Resource Set Pool Index and a TCI state specific to a second Control Resource Set Pool Index; the wireless device receives Downlink Control Information (DCI) for scheduling the Physical Downlink Shared Channel (PDSCH), wherein the DCI is associated with a Control Resource Set Pool Index from the first Control Resource Set Pool Index and the second Control Resource Set Pool Index; and the wireless device determines the TCI state of the PDSCH based on the DCI.

2. The method according to claim 1, wherein, The scheduling offset between the PDSCH and the DCI is less than a threshold.

3. The method according to any one of claims 1 or 2, wherein, The wireless device is in frequency range 1, or the wireless device reports its ability to support more than one default beam in frequency range 2, and wherein determining the TCI state includes applying an indication specific to the control resource set pool index associated with the DCI.

4. The method according to any one of claims 1 or 2, wherein, The wireless device is in frequency range 2, or the wireless device does not report its ability to support more than one default beam, and at least one of the following applies: wherein determining the TCI state includes: applying the first indicated TCI state if the control resource set pool index associated with the DCI has a specific value, or if the DCI is associated with the first control resource set pool index; or wherein the PDSCH is unschedulable if the first control resource set pool index and the control resource set pool index associated with the DCI have different values.

5. The method according to claim 1, wherein, The scheduling offset between the PDSCH and the DCI is greater than or equal to a threshold, and at least one of the following applies: wherein the DCI is associated with the second control resource set pool index; wherein the DCI is not associated with the first control resource set pool index; or wherein the control resource set pool index associated with the DCI has a specific value.

6. A wireless communication method, the method comprising: The wireless device receives downlink control information (DCI) that schedules the physical downlink shared channel (PDSCH), wherein the scheduling offset between the PDSCH and the DCI is less than a threshold; the wireless device prioritizes the reception of the physical downlink control channel (PDCCH), wherein the PDCCH and the PDSCH overlap in at least one time unit; and the wireless device receives the PDCCH.

7. The method of claim 6, further comprising receiving, by the wireless device, a first indicated Transmission Configuration Indication (TCI) state and a second indicated TCI state, wherein at least one of the following applies: One or more TCI states corresponding to the PDCCH are different from, do not originate from, do not belong to, or do not include one or more specific TCI states from the first indicated TCI state and the second indicated TCI state; or wherein one or more TCI states corresponding to the PDCCH are different from any one of the one or more specific TCI states from the first indicated TCI state and the second indicated TCI state; wherein the Quasi-Coaddress Type D QCL-Type D attribute corresponding to the PDCCH is different from, does not originate from, does not belong to, or does not include one or more specific TCI states from the first indicated TCI state and the second indicated TCI state; or wherein the QCL-Type D attribute corresponding to the PDCCH is different from, does not originate from, does not belong to, or does not include the QCL-Type D attribute corresponding to one or more specific TCI states from the first indicated TCI state and the second indicated TCI state.

8. The method of claim 6, wherein at least one of the following applies: The quasi-colocation type D QCL-Type D attribute corresponding to the PDCCH is different from, does not originate from, does not belong to, or does not include the QCL-Type D attribute corresponding to the PDSCH; wherein, the QCL-Type D attribute corresponding to the PDCCH is different from any of the QCL-Type D attributes corresponding to the PDSCH; or wherein, the QCL-Type D attribute corresponding to the PDSCH is different from any of the QCL-Type D attributes corresponding to the PDCCH.

9. The method according to any one of claims 7 or 8, wherein, The wireless device is in frequency range 1, or the wireless device reports its ability to support more than one default beam in frequency range 2, and wherein one or more specific TCI states include both a first indicated TCI state and a second indicated TCI state.

10. The method according to claim 7 or 8, wherein, At least one of the following applies: wherein one or more specific TCI states from the first indicated TCI state and the second indicated TCI state are applied to the PDSCH; or wherein the wireless device is in frequency range 2, or the wireless device does not report its ability to support more than one default beam.

11. The method according to claim 6, wherein, The PDCCH is associated with the control resource set pool index, and the transmission configuration indication TCI status or quasi-co-location type D QCL-Type D attribute of the PDSCH is different from the transmission configuration indication TCI status or quasi-co-location type D QCL-Type D attribute of the PDCCH.

12. The method according to claim 6, wherein, The transmission configuration indication TCI state of the PDCCH corresponds to the same control resource set pool index as the PDSCH.

13. The method according to claim 6, wherein, The transmission configuration indication TCI state of the PDCCH corresponds to a different control resource set pool index than that of the PDSCH.

14. The method according to claim 13, wherein, The wireless device is in frequency range 2, or the wireless device does not report its ability to support more than one default beam.

15. A wireless communication method, the method comprising: The downlink DL signal is received by the wireless device; The wireless device receives downlink control information (DCI) that triggers an aperiodic channel state information reference signal (AP-CSI-RS), wherein the trigger offset between the AP-CSI-RS and the DCI is less than a threshold, and wherein the AP-CSI-RS overlaps with the DL signal in at least one time unit; and the wireless device determines the quasi-co-addressable (QCL) attribute of the AP-CSI-RS based on the DL signal.

16. The method according to claim 15, wherein, At least one of the following applies: wherein one or more transmission configuration indication TCI states corresponding to the DL signal are different from or do not include a specific TCI state indicated by a higher-layer configuration provided to the AP-CSI-RS; wherein one or more QCL attributes corresponding to the DL signal are different from or do not include the QCL attributes of the AP-CSI-RS; or wherein one or more TCI states corresponding to the DL signal are different from or do not include the TCI states corresponding to the AP-CSI-RS.

17. The method according to claim 15 or 16, wherein, At least one of the following applies: wherein the DCI is associated with a control resource pool index; or wherein the control resource pool index associated with the DL signal and the control resource pool index associated with the AP-CSI-RS have different values.

18. The method of claim 15, further comprising receiving, by the wireless device, a first indicated Transmission Configuration Indication (TCI) state and a second indicated TCI state, wherein, The DL signal includes one of the following: Type-1 DL signal, Type-2 DL signal, or Type-3 DL signal.

19. The method according to claim 18, wherein, The Type-1 DL signal applies the first indicated TCI state and the second indicated TCI state, wherein the Type-2 DL signal applies the first indicated TCI state or the second indicated TCI state, and wherein the Type-3 DL signal does not apply or follow the indicated TCI state.

20. The method according to claim 18 or 19, wherein, The Type-1 DL signal includes one or more of the following: Physical Downlink Shared Channel (PDSCH), wherein the scheduling offset of the PDSCH is greater than or equal to a threshold; or Physical Downlink Control Channel (PDCCH) in the control resource set.

21. The method according to claim 18 or 19, wherein, The Type-2 DL signal includes one or more of the following: a Physical Downlink Shared Channel (PDSCH), wherein the scheduling offset of the PDSCH is greater than or equal to a first threshold; an Additional PDSCH, unless the Additional PDSCH has two indicated TCI states; a Periodic Channel State Information Reference Signal (P-CSI-RS); a Semi-Static Channel State Information Reference Signal (SP-CSI-RS); an Additional AP-CSI-RS, wherein the trigger offset of the Additional AP-CSI-RS is greater than or equal to a second threshold; or a Physical Downlink Control Channel (PDCCH) in a control resource set.

22. The method according to claim 18 or 19, wherein, The Type-3 DL signal includes one or more of the following: periodic channel state information reference signal P-CSI-RS; semi-static channel state information reference signal SP-CSI-RS; additional AP-CSI-RS, wherein the trigger offset of the additional AP-CSI-RS is greater than or equal to a threshold; or physical downlink control channel PDCCH in the control resource set.

23. The method according to any one of claims 18 to 20, wherein, The DL signal includes the Type-1 DL signal, wherein the wireless device is in frequency range 1, or the wireless device reports its ability to support more than one default beam in frequency range 2, and wherein determining the QCL attribute includes applying one of the first indicated TCI state or the second indicated TCI state according to the higher-layer configuration provided to the AP-CSI-RS.

24. The method according to any one of claims 18 to 20, wherein, The DL signal includes the Type-1 DL signal, wherein the wireless device is in frequency range 2, or the wireless device does not report its ability to support more than one default beam, and at least one of the following applies: wherein determining the QCL attribute includes applying the TCI state of the first indication; wherein determining the QCL attribute includes applying the TCI state or QCL attribute of the Type-1 DL signal; or wherein determining the QCL attribute includes applying one of the TCI state of the first indication or the TCI state of the second indication according to the higher-layer configuration provided to the AP-CSI-RS.

25. The method according to any one of claims 18, 19 or 21, wherein, The DL signal includes the Type-2 DL signal, and at least one of the following applies: wherein determining the QCL attribute includes applying the TCI state or QCL attribute of the Type-2 DL signal; or wherein the QCL attribute is determined based on whether the wireless device is within frequency range 1 or whether the wireless device reports its ability to support more than one default beam.

26. The method according to claim 25, wherein, The wireless device is in frequency range 1, or the wireless device reports its ability to support more than one default beam in frequency range 2, and wherein determining the QCL attribute includes applying one of the first indicated TCI state or the second indicated TCI state according to the higher-level configuration provided to the AP-CSI-RS.

27. The method according to claim 25, wherein, The wireless device is in frequency range 2, or the wireless device does not report its ability to support more than one default beam, and wherein determining the QCL attribute includes applying the TCI state or QCL attribute of the Type-2 DL signal.

28. The method according to any one of claims 18, 19, or 22, wherein, The DL signal includes the Type-3 DL signal, and wherein determining the QCL attribute includes applying the TCI state or QCL attribute of the Type-3 DL signal.

29. The method according to any one of claims 18, 19 or 22, wherein, If the DL signal includes more than one TCI state or QCL attribute, then the overlap between the AP-CSI-RS and the DL in the at least one time unit is excluded.

30. The method according to any one of claims 2, 6, or 15, wherein, The scheduling offset between the PDSCH and the DCI is less than a first threshold, wherein the trigger offset between the AP-CSI-RS and the DCI is less than a second threshold, and wherein the wireless device indicates a common threshold for the first threshold and the second threshold, or the wireless device indicates different thresholds for the first threshold and the second threshold.

31. The method according to claim 30, wherein, The first threshold of the different thresholds is a value indicated by the wireless device, and the second threshold of the different thresholds is a fixed value or a value indicated by the wireless device.

32. A wireless communication method, the method comprising: The network node transmits a Transmission Configuration Indicator (TCI) state specific to a first indication of a first Control Resource Set Pool Index and a TCI state specific to a second Control Resource Set Pool Index; the network node transmits Downlink Control Information (DCI) for scheduling the Physical Downlink Shared Channel (PDSCH), wherein the DCI is associated with a Control Resource Set Pool Index from the first Control Resource Set Pool Index and the second Control Resource Set Pool Index; and the network node transmits the PDSCH according to the TCI state based on the DCI.

33. A wireless communication method, the method comprising: The network node transmits downlink control information (DCI) that schedules the physical downlink shared channel (PDSCH), wherein the scheduling offset between the PDSCH and the DCI is less than a threshold; the network node prioritizes the transmission of the physical downlink control channel (PDCCH), wherein the PDCCH and the PDSCH overlap in at least one time unit; and the network node transmits the PDCCH.

34. The method according to claim 33, further comprising: The network node transmits a first indicated transmission configuration indication TCI state and a second indicated TCI state to the wireless device, wherein one or more specific TCI states from the first indicated TCI state and the second indicated TCI state are applied to the PDSCH, and wherein one or more TCI states corresponding to the PDCCH are different from, do not come from, do not belong to, or do not include the one or more specific TCI states.

35. The method according to claim 34, wherein, The wireless device is in frequency range 1, or the wireless device reports its ability to support more than one default beam in frequency range 2, and wherein the one or more specific TCI states include both the first indicated TCI state and the second indicated TCI state.

36. The method according to claim 34, wherein, The wireless device is in frequency range 2, or the wireless device does not report its ability to support more than one default beam.

37. A wireless communication method, the method comprising: Downlink DL signals are transmitted by network nodes; The network node transmits downlink control information (DCI) that triggers the aperiodic channel state information reference signal (AP-CSI-RS), wherein the trigger offset between the AP-CSI-RS and the DCI is less than a threshold, and wherein the AP-CSI-RS overlaps with the DL signal in at least one time unit; and the network node transmits the AP-CSI-RS based on the DL signal according to the quasi-co-located QCL attribute.

38. The method according to claim 37, further comprising: The network node transmits a first indication of the transmission configuration indication (TCI) state and a second indication of the TCI state to the wireless device, wherein the DL signal includes one of a Type-1 DL signal, a Type-2 DL signal, or a Type-3 DL signal.

39. The method according to any one of claims 37 or 38, wherein, The DL signal includes a Type-1 DL signal, wherein the wireless device is in frequency range 1, or the wireless device reports its ability to support more than one default beam in frequency range 2, and wherein receiving the QCL attribute includes applying one of a first indicated TCI state or a second indicated TCI state according to the higher-layer configuration provided to the AP-CSI-RS.

40. The method according to any one of claims 37 or 38, wherein, The DL signal includes a Type-1 DL signal, wherein the wireless device is in frequency range 2, or the wireless device does not report its ability to support more than one default beam, and at least one of the following applies: wherein receiving the QCL attribute includes applying a first indicated TCI state; or wherein receiving the QCL attribute includes applying one of the first indicated TCI state or the second indicated TCI state according to the higher-layer configuration provided to the AP-CSI-RS.

41. The method according to any one of claims 37 or 38, wherein, The DL signal includes a Type-2 DL signal, and at least one of the following applies: wherein receiving the QCL attribute includes applying the TCI state or QCL attribute of the Type-2 DL signal; or wherein the QCL attribute is received based on whether the wireless device is within frequency range 1 or whether the wireless device reports its ability to support more than one default beam.

42. The method according to any one of claims 37 or 38, wherein, The DL signal includes a Type-3 DL signal, and wherein receiving the QCL attribute includes applying the TCI state or QCL attribute of the Type-3 DL signal.

43. An apparatus for wireless communication, the apparatus comprising a processor, wherein, The processor is configured to implement the method according to any one or more of claims 1 to 42.

44. A computer-readable program storage medium having code stored thereon, which, when executed by a processor, causes the processor to perform the method of any one or more of claims 1 to 42.

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