TRANSMISSION CONFIGURATION INSTRUCTIONS FOR DOWNLINK TRANSMISSIONS USING MULTIPLE TRANSMITTING AND RECEIVER POINTS - Patent application

Abstract

Methods, apparatus, and systems related to efficient indication of beam states under a unified framework for downlink channel and reference signal transmission in multiple transmitting / receiving point operation are disclosed. In one exemplary aspect, a method for wireless communication includes determining one or more beam states associated with a transmission from a base station to a terminal device and performing the transmission according to the one or more beam states. A beam state is associated with multiple channels and reference signals.

Description

[Technical Field]

[0001] This patent document relates to digital communications. [Background technology]

[0002] Mobile communication technologies are moving the world toward an increasingly connected and networked society. The rapid growth of mobile communications and technological advances are resulting in greater demands for capacity and connectivity. Other aspects, such as energy consumption, device cost, spectral efficiency, and latency, are also important to meet the needs of various communication scenarios. Various technologies, including new methods, are being discussed to provide higher quality of service, longer battery life, and improved performance. Summary of the Invention [Means for solving the problem]

[0003] This patent document describes, inter alia, techniques relating to efficient indication of beam states under a unified framework for downlink channel and reference signal transmission in multiple transmitting and receiving point operations.

[0004] In one exemplary aspect, a method for wireless communication includes determining one or more beam states associated with a transmission from a base station to a terminal device, and performing the transmission according to the one or more beam states, wherein a plurality of channels and a reference signal are associated with a single beam state.

[0005] In another exemplary aspect, a communications apparatus is disclosed, the apparatus including a processor configured to implement the above-described method.

[0006] In yet another exemplary aspect, a computer program storage medium is disclosed that includes stored code that, when executed by a processor, causes the processor to implement a described method.

[0007] The disclosed techniques can be used to implement precoding matrices suitable for both short-range and long-range communications, thereby enabling flexible switching between different types of communications. Furthermore, the disclosed techniques reduce signaling overhead for indicating a precoding matrix and provide exemplary methods for determining specific parameters of a precoding matrix to enable the precoding matrix to match a communication channel between two wireless communication nodes.

[0008] These and other aspects are described herein. The present invention provides, for example, the following. (Item 1) 1. A method for wireless communication, the method comprising: determining one or more beam states associated with transmissions from a base station to a terminal device, wherein a plurality of channels and reference signals are associated with a single beam state; performing said transmission in accordance with said one or more beam states; 12. A method for wireless communication, comprising: (Item 2) Item 1, wherein the beam state comprises at least one of a transmission configuration indicator (TCI) state, a quasi-collocation (QCL) state, a spatial relationship, a reference signal (RS), a spatial filter, or a precoding matrix. (Item 3) The method of item 1 or 2, wherein a beam state of the one or more beam states corresponds to at least one of a port associated with the transmission, a port group associated with the transmission, a reference signal resource associated with the transmission, or a set of reference signal resources associated with the transmission. (Item 4) 4. The method of claim 1, wherein the transmission comprises at least one of a physical downlink control channel (PDCCH) transmission, a physical downlink shared channel (PDSCH) transmission, or a channel state information reference signal (CSI-RS) transmission. (Item 5) transmitting, by the base station to the terminal device, a first signaling message configuring a plurality of beam states; transmitting, by the base station to the terminal device, a second signaling message, the second signaling message activating one or more beam code points, each of the one or more beam code points corresponding to at least one beam state of the plurality of beam states; transmitting, by the base station, a first downlink control information (DCI) message to the terminal device, the first DCI message comprising a first field indicating a beam code point from the one or more beam code points activated by the second signaling message, and a selected beam state being determined according to the beam code point; transmitting, by the base station to the terminal device, a second DCI message scheduling the transmission, wherein the one or more beam states are applied to the transmission, the one or more beam states being from the selected beam state or a specific beam state; 5. The method according to any one of items 1 to 4, further comprising: (Item 6) receiving, by the terminal device, from a base station, a first signaling message configuring a plurality of beam states; receiving, by the terminal device, from the base station, a second signaling message activating one or more beam code points, each of the one or more beam code points corresponding to at least one beam state of the plurality of beam states; receiving, by the terminal, from the base station, a first downlink control information (DCI) message, the first DCI message comprising a first field indicating a beam code point from the one or more beam code points activated by the second signaling message; determining a selected beam state according to the beam code points; receiving, by the terminal device, from the base station, a second DCI message scheduling the transmission, wherein the one or more beam states are to be applied to the transmission, the one or more beam states being from a selected beam state or a specific beam state; 5. The method according to any one of items 1 to 4, further comprising: (Item 7) 7. The method of claim 5, wherein a second field for indicating the one or more beam states is present in the second DCI message, and candidate values ​​of the second field comprise at least one of a first value corresponding to having a first beam state for the transmission, a second value corresponding to having a second beam state for the transmission, or a third value corresponding to having both the first beam state and the second beam state for the transmission. (Item 8) the third value corresponding to having both the first beam state and the second beam state for the transmission is: a value corresponding to having both the first and second beam states for the resource group of the transmission; a value corresponding to having the first beam state for a first resource group of the transmission followed by the second beam state for a second resource group of the transmission; or a value corresponding to having the second beam state for the first resource group of the transmission followed by having the first beam state for the second resource group of the transmission Item 8. The method of item 7, further comprising at least one of: (Item 9) Item 9. The method of item 8, wherein the resource group comprises at least one of a reference signal port, a reference signal port group, a reference signal resource, a reference signal resource set, a resource block (RB) group, or a transmission repetition. (Item 10) Item 8. The method of item 7, wherein the third value is associated with a non-coherent joint transmission mode, a coherent joint transmission mode, a single frequency network mode, a first mode in which the first and second beam states are applied to respective demodulation reference signal (DMRS) port groups of the transmission, and / or a second mode in which the first and second beam states are applied to DMRS ports of the transmission. (Item 11) The second field is present in the second DCI signaling due to a condition being met, the condition being: (1) the selected beam states include two or more beam states associated with a QCL type parameter; (2) one of the one or more beam code points corresponds to two or more beam states associated with a QCL type parameter; (3) the presence of the second field is configured by a higher layer signaling message; or (4) The control resource set corresponding to the second DCI signaling has an index of 0, is associated with a terminal device-specific search space or a type 3 common search space, or is configured to follow one or more beam states or selected beam states; 7. The method according to item 5 or 6, comprising at least one of: (Item 12) 12. The method according to any of items 7 to 11, wherein the candidate values ​​of the second field are configured by a higher layer signaling message. (Item 13) 13. A method according to any of items 5 to 12, wherein the second field indicates whether multiple beam states in the selected beam state are applied to respective demodulation reference signal (DMRS) port groups of the transmission or DMRS ports of the transmission. (Item 14) a second field associated with the indication of the beam state is not present in the second DCI message; (1) the selected beam state is applied to the transmission, or (2) the particular beam state is applied to the transmission; Item 7. The method according to item 5 or 6. (Item 15) 15. The method of any of items 5 to 14, wherein the second DCI message has a format that is at least one of DCI format 1_1 or DCI format 1_2. (Item 16) 16. The method of any of items 5 to 15, wherein the transmission relates to a channel state information (CSI) reference signal (RS), and the second DCI message indicates an association between the one or more beam states from the selected beam state and the CSI-RS. (Item 17) Item 17. The method of item 16, wherein the second field or the third field associated with a sounding reference signal (SRS) resource set indicator in the second DCI message indicates the association. (Item 18) 18. The method of any of items 1 to 17, wherein the transmission is related to a channel state information (CSI) reference signal (RS), and the association between the one or more beam states and the CSI-RS is configured for a CSI-RS resource, a CSI-RS resource set, a CSI-RS resource configuration, a CSI reporting configuration, a trigger state, a CORESET, or a search space set. (Item 19) 19. The method of any of items 17 to 18, wherein the second DCI message has a format that is at least one of DCI format 0_0, DCI format 0_1, or DCI format 0_2. (Item 20) 20. The method of any of items 1 to 19, wherein time domain parameters for periodic or semi-persistent CSI-RS are associated with the beam state. (Item 21) 21. The method of claim 20, wherein the time domain parameters comprise at least one of a time domain offset. (Item 22) A method according to any of items 5 to 21, wherein determining the one or more beam states from the selected beam state is based on association parameters, the association parameters being carried in a DCI message or associated with a control resource set (CORESET) corresponding to the DCI message. (Item 23) the one or more beam states from the selected beam state are determined based on a time unit of the transmission or the DCI message; The beam state of the indicated beam code point is applied to transmissions associated with the same association parameters as said beam state, or the selected beam state comprises at least one beam state valid for each association parameter; 23. The method according to any one of items 5 to 22. (Item 24) 24. The method of any of items 16 to 23, wherein the association is indicated by a controlled resource set pool identifier. (Item 25) the second DCI message has DCI format 1_0; (1) the selected beam state is applied to the transmission, or (2) the particular beam state is applied to the transmission; Item 7. The method according to item 5 or 6. (Item 26) 26. The method according to claim 25, wherein the selected beam state is applied to transmission, and the terminal device is configured to have two or more default beam states. (Item 27) 27. The method of any of items 5 to 26, wherein one or more beam states applied to a control resource set or search space set for scheduling the transmission are applied to the transmission. (Item 28) Item 28. The method of item 27, wherein the one or more beam states associated with the control resource set are applied to the transmission in response to (1) the control resource set being associated with a single beam state, (2) the schedule offset of the transmission being greater than or equal to a threshold, (3) the QCL type or spatial relationship being not applicable or configured, or (4) the transmission being within a first frequency range. (Item 29) 29. A method according to any of items 1 to 28, wherein two or more beam states are applied to a control resource set or a search space set configured to schedule the transmission, and a specific beam state is applied to the transmission, the specific beam state comprising at least one of a first beam state of the two or more beam states, a first beam state in the selected beam state, or a beam state configured for the control resource set or the search space set. (Item 30) 30. A method according to any of items 5 to 29, wherein the specific beam state is applied to the transmission, and the specific beam state comprises at least one of a first beam state in the selected beam state, a beam state indicated by an upper layer signaling message, a beam state associated with a given time unit, or a beam state associated with a control resource set. (Item 31) 31. The method of claim 30, wherein the set of controlled resources has a specific identifier, is associated with the transmission, is monitored, or is in the latest slot of the transmission. (Item 32) 32. A method according to any of items 29 to 31, wherein whether the particular beam state or the selected beam state is applied to the transmission is based on the capabilities or configuration parameters of the terminal device. (Item 33) Item 33. The method of any of items 1 to 32, wherein the scheduling offset of the transmission is less than a threshold value. (Item 34) Item 34. The method of any of items 1 to 33, wherein a trigger offset of a CSI-RS associated with the transmission is less than a threshold value. (Item 35) 35. A communications device comprising a processor configured to implement the method according to one or more of items 1 to 34. (Item 36) 35. A computer program product storing code that, when executed by a processor, causes the processor to implement the method of any one or more of items 1 to 34. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 illustrates an exemplary beam-based transmission between one transmit / receive point (TRP) and one user equipment (UE) panel.

[0010] [Figure 2] FIG. 2 illustrates an exemplary multi-TRP operation in accordance with one or more embodiments of the present technology.

[0011] [Figure 3] FIG. 3 illustrates an exemplary association between beam states and target channels / reference signals for multi-TRP operation under a unified transmission configuration indicator (TCI) framework in accordance with one or more embodiments of the present technology.

[0012] [Figure 4] FIG. 4 illustrates an exemplary unified TCI framework for indicating downlink channel and reference signal transmission in multi-TRP operation in accordance with one or more embodiments of the present technology.

[0013] [Figure 5] FIG. 5 illustrates an exemplary signaling framework in accordance with one or more embodiments of the present technology.

[0014] [Figure 6] FIG. 6 is a flowchart diagram of a method for digital communication in accordance with one or more embodiments of the present technology.

[0015] [Figure 7] FIG. 7 illustrates an example of a wireless communication system in which techniques according to one or more embodiments of the present technology may be applied.

[0016] [Figure 8] FIG. 8 is a block diagram representation of a portion of a wireless station in which one or more embodiments of the present technology may be applied. DETAILED DESCRIPTION OF THE INVENTION

[0017] Section headings are used in this document solely to improve readability and are not intended to limit the scope of the disclosed embodiments and techniques in each section to that section alone. Additionally, some embodiments are described with reference to the 3rd Generation Partnership Project (3GPP®), Fifth Generation (5G), New Radio (NR), or Sixth Generation (6G) standards for ease of understanding, and the described techniques may be implemented in different wireless systems implementing protocols other than NR or 6G protocols.

[0018] As wide-area or ultra-wide-area spectrum resources become expensive, the significant propagation losses caused by very high frequencies pose a significant challenge. To address this issue, antenna arrays and beamforming training techniques (e.g., up to 1024 antenna elements per node) using massive multiple-input, multiple-output (MIMO) technology have been adopted to achieve beam alignment and obtain sufficiently high antenna gain. To maintain low implementation costs while benefiting from antenna arrays, analog phase shifters have become very attractive for implementing millimeter-wave beamforming (BF), which means that the number of controllable phases is finite and certain modulus constraints are imposed on these antenna elements. Given a pre-specified beam pattern, a variable phase-shift-based BF training target can identify the desired pattern for subsequent data transmission. Figure 1 shows an example beam-based transmission between one transmit / receive point (TRP) and one user equipment (UE) panel.

[0019] Multi-TRP operation is considered an emerging technology for balancing deployment costs and throughput / robustness. Figure 2 illustrates an example multi-TRP operation in accordance with one or more embodiments of the present technology. In multi-TRP operation, particularly for cell-edge UEs in frequency division duplexing (FDD) or time division duplexing (TDD), channel state information (CSI) (such as a precoding matrix indicator (PMI), rank indicator (RI), and channel quality indicator (CQI)) for determining downlink precoding is reported from the UE to the base station. In some cases, even for a single transmission layer or demodulation reference signal (DMRS) port, precoding is provided accordingly for transmit antennas across multiple TRPs.

[0020] In Long Term Evolution (LTE) systems, transmission configuration indicator (TCI) state indications are flexibly employed to indicate the mapping of beam-related information (e.g., reference signals, quasi-co-location (QCL) information, and / or between resources) to transmissions. However, the flexibility of TCI state indication also results in significant signaling overhead. In 5G NR, a unified TCI framework is adopted for single TRP transmission. The unified TCI framework associates a single TCI state (or a single beam state) with multiple channels and reference signals (including the physical downlink control channel (PDCCH), the physical downlink shared channel (PDSCH), the CSI reference signal (CSI-RS), the physical uplink control channel (PUCCH), the physical uplink shared channel (PUSCH), and / or the sounding reference signal (SRS)).

[0021] The extension of the unified TCI framework to multi-TRP operation, including non-coherent joint transmission (NCJT), coherent joint transmission (CJT), and single frequency network (SFN), is urgently needed to enable efficient indication of beam-related information or beam state for mTRP operation. Several aspects need to be considered to enable efficient indication of beam state for mTRP under the unified TCI framework.

[0022] (1) To facilitate dynamic switching between multi-TRP and single-TRP operation, a new field is required to indicate the TCI / beam state for scheduling PDSCH using multi-TRP. When multiple TRPs are used for transmission instead of the conventional beam indication mechanism using radio resource control (RRC) signaling, medium access control (MAC) control element (CE) signaling, and single downlink control information (DCI) signaling, additional fields or signaling messages are required to identify the corresponding characteristics.

[0023] (2) Further consideration is needed for aperiodic CSI-RS in multi-TRP operation to optimize CSI-RS resource usage and facilitate transmission with a specific scheduling offset (e.g., a time-domain offset smaller than a threshold). Aperiodic CSI-RS transmission may follow one of the indicated TCI states (respectively mapped to each TRP of the multiple TRPs) as a default option, although semi-static or dynamic association may be considered.

[0024] (3) To support a unified TCI framework for CJT and SFN, it is necessary to consider a mechanism for indicating the transmission mode and corresponding DMRS port to facilitate CJT / SFN transmission for PDSCH.

[0025] This patent document discloses techniques that can be implemented in various embodiments to enable efficient indication of beam / TCI states under a unified TCI framework for downlink channel and reference signal transmission in multi-TRP operation (e.g., PDCCH, PDSCH, and CSI-RS). The disclosed techniques provide a multi-TRP beam state indication framework without introducing unnecessary signaling overhead and can enable dynamic point selection for multi-TRP operation and dynamic switching between multi-TRP (mTRP) and single-TRP (sTRP) operation.

[0026] (term)

[0027] The term "beam state" generally encompasses relevant information related to beamforming in communications. A "beam state" may be interchangeable with a quasi-co-location (QCL) state, a transmission configuration indicator (TCI) state, a spatial relationship (also referred to as spatial relationship information), a reference signal (RS) in the downlink or uplink direction, a spatial filter, and / or a precoding matrix (or precoding information). Furthermore, a "beam state" may also be referred to as a "beam." Furthermore, a TCI state includes at least one of a DL TCI state or a joint TCI state for both DL and UL. Furthermore, a DL TCI state or a joint TCI state for both DL and UL includes one or more reference RSs and their corresponding QCL type parameters.

[0028] Specifically, a "beam state" is associated with or includes one or more reference RSs and / or their corresponding QCL-type parameters, where the QCL-type parameters include at least one of the following aspects or combinations: [1] Doppler spread, [2] Doppler shift, [3] delay spread, [4] mean delay, [5] mean gain, and [6] spatial parameters. The definitions of "QCL-TypeA", "QCL-TypeB", "QCL-TypeC", and "QCL-TypeD" are as follows:

[0029] 'QCL-TypeA': {Doppler shift, Doppler spread, mean delay, delay spread}

[0030] 'QCL-TypeB':{Doppler shift, Doppler spread}

[0031] 'QCL-TypeC': {Doppler shift, average delay}

[0032] 'QCL-TypeD':{Spatial Rx parameters}

[0033] The term "TCI state" is interchangeable with "beam state."

[0034] The term "transmit (Tx) beam" may be interchangeable with QCL state, TCI state, spatial relationship state, reference signal (e.g., CSI-RS, synchronization signal block (SSB), also known as synchronization signal / physical broadcast channel (SS / PBCH), DMRS, SRS, and / or physical random access channel (PRACH)), Tx spatial filter, or Tx precoding.

[0035] The term "receive (Rx) beam" may be interchangeable with QCL state, TCI state, spatial relationship state, Rx spatial filter, and / or Rx precoding.

[0036] The term "beam identifier (ID)" may be interchangeable with QCL state index, TCI state index, spatial relationship state index, reference signal index, spatial filter index, or precoding index.

[0037] The term "spatial relationship information" includes one or more reference RSs used to represent the same or near-identical spatial relationship between a target RS / channel and one or more reference RSs.

[0038] The term "spatial parameters" may be interchangeable with spatial Tx parameters, spatial Rx parameters, or spatial filters. Spatial filters are also referred to as spatial domain filters. Specifically, the spatial filters may be either on the UE side or the gNB side.

[0039] The term "channel" may be a UL channel or a DL channel.

[0040] The term "RS" can be UL RS or DL ​​RS.

[0041] The term "UL channel" may be a PUCCH or a PUSCH.

[0042] The term "DL channel" may be a PDCCH or a PDSCH.

[0043] The term "UL RS" may be SRS, PRACH, or DMRS for PUSCH and / or PUCCH.

[0044] The term "DL RS" may be SSB, CSI-RS, DMRS for PDSCH and / or PDCCH.

[0045] The term "UL signal" may be an UL channel or an UL RS (e.g., SRS, PRACH, DMRS, PUSCH, or PUCCH).

[0046] The term "DL signal" may be a DL channel or DL ​​RS (SSB, CSI-RS, DMRS, PDSCH, or PDCCH).

[0047] The term "time unit" may be a sub-symbol, a symbol, a slot, a sub-frame, a frame, or a transmission opportunity.

[0048] The term "first beam state" includes at least one of a beam state having a first position and a beam state having a particular identifier.

[0049] The term "particular identifier" includes at least one of the lowest identifier, the highest identifier, an identifier equal to 0, or an identifier equal to 1.

[0050] The term "selected beam state" may be interchangeable with effective beam state, pool of beam states, or commanded beam state.

[0051] The term "DCI" is interchangeable with "PDCCH."

[0052] The term "precoding information" includes at least one of a precoding matrix index (PMI), a transmit precoding matrix index (TPMI), a precoding, or a beam.

[0053] The term "TRP" is interchangeable with and can be represented by an RS port, an RS port group, an RS resource, and / or an RS resource set.

[0054] The term "port group" is interchangeable with antenna group or UE port group. The term "CSI reporting configuration" is interchangeable with CSI-AssociatedReportConfigInfo or CSI-ReportConfig. The term "beam state is applied to transmission" is interchangeable with "perform transmission according to beam state."

[0055] (Unified framework for beam state indication for multi-TRP)

[0056] Under the LTE framework, one or more beam states (e.g., TCI states) can be indicated by commands (e.g., DCI or MAC-CE commands) for determining QCL assumptions for DL ​​signals or spatial relationship / power control parameters for UL signals. Under the unified TCI framework, instead of indicating one beam state per channel / reference signal in the downlink or uplink direction, an indicated beam state may be applicable to multiple channels / RSs. For multi-TRP operation, it is necessary to introduce an "anchor" to connect the association between a beam state and each channel / RS. In this document, such an anchor is referred to as an association entry or association parameter.

[0057] FIG. 3 illustrates an example association between beam states and target channels / reference signals for multi-TRP operation under a unified TCI framework according to one or more embodiments of the present technology. The term "M-DCI" in FIG. 3 represents the use of multiple DCI signaling messages to schedule mTRP transmissions. The term "S-DCI" in FIG. 3 represents the use of a single DCI signaling message to schedule mTRP transmissions. DCI signaling can be used as M-DCI or S-DCI without explicit distinction in DCI format and / or fields. In the case of M-DCI, each DCI can be associated with a CORESET pool (e.g., via coresetPoolIndex) that indicates the set of control resources corresponding to the TRP. Thus, the identifier of the CORESET pool (e.g., coresetPoolIndex) can serve as an anchor (association entry, association parameter) for connecting beam states with the respective channels / reference signals.

[0058] In the case of S-DCI, different or additional fields can be used as association entries to indicate connections. When activating multiple TCI / beam code points at the MAC-CE level, one or more beam states for the beam code points are activated, and each beam state for the beam code point can be provided with a respective association entry. A beam / TCI code point includes a set of beam / TCI states, each with a respective index. The association entry can be a renumbered index for the TCI state within the code point (e.g., first beam state, second beam state, i-th beam state, first beam state group, second beam state group, j-th beam state group), where i and j represent integers. One of the beam states can then be indicated by the DCI message. Furthermore, the association parameter can include none (e.g., a null value). "none" (or a "null" value) indicates that the channel / reference signal does not follow any of the indicated beam / TCI states.

[0059] FIG. 4 illustrates an exemplary unified TCI framework for indicating downlink channel and reference signal transmission in multi-TRP operation according to one or more embodiments of the present technology. As shown in Case 1 of FIG. 4, the DCI indication in step 3 may indicate a beam state code point associated with a beam state. The association may be provided with an association entry (e.g., corresponding to a TRP or a first / second beam state). As shown in Case 2 of FIG. 4, the DCI indication in step 3 may indicate beam code points associated with two beam states. Each of them may be associated with a respective association entry corresponding to a TRP.

[0060] In some embodiments, a channel / RS can be configured with an association parameter, whereby a TCI / beam state corresponding to the association parameter is applied to the channel / RS. For example, candidate values ​​for the association parameter include at least one of: none, a first beam state, a second beam state, both the first and second beam states, the i-th beam state, all beam states at the code point, a first beam state group, a second beam state group, both the first and second beam state groups, a j-th beam state group, and all beam state groups at the code point, where i and j represent integers.

[0061] For M-DCI-based mTRP operation, an association entry can be included in the MAC-CE command associated with the activated beam state. The association entry can be a control resource set pool identifier (e.g., CORESETPoolId). The activated beam state is then applied to the channels / RSs associated with the same association entry.

[0062] Beam indication for PDSCH in S-DCI based mTRP operation

[0063] For S-DCI based mTRP operation, it is necessary to consider different transmission modes such as dynamic switching between sTRP, NCJT, CJT, and / or SFN modes to accommodate channel changes (e.g., unpredicted link failures). To support dynamic switching, a new DCI field may be provided to indicate one or both of the TCI states that may apply to a scheduled PDSCH transmission.

[0064] To apply a beam state to the PDSCH, multiple beam states (e.g., TCI states) can be configured in a first command (e.g., an RRC signaling message). A second command (e.g., a MAC-CE command) can activate one or more beam code points (e.g., TCI code points). Each beam / TCI code point includes one or more beam states from multiple beam states. A third command including a beam code point field (e.g., a TCI code point indication field) indicates a code point from one or more beam code points. The beam state corresponding to the code point can be applied to the transmission (or can be considered as the selected / effective beam state for the transmission).

[0065] Finally, given a PDSCH transmission, a fourth command (e.g., a DCI message) including a beam state indication field (e.g., a TCI state indication field) indicates one or more beam states from the applicable / valid beam states. That is, the fourth command provides one or more association parameters via the beam state indication field. In some embodiments, for a given association entry / parameters, only one beam state is determined and applied. Furthermore, the beam state corresponding to the indicated code point is applied to the DL channel / RS associated with the same association entry as the beam state. In some embodiments, the applied beam state is determined according to the time unit of the PDSCH transmission. In some embodiments, the DCI includes DCI format 1_1 and DCI format 1_2.

[0066] Furthermore, the conditions for the beam status field indication field to be present in the fourth command (e.g., DCI message) include at least one of the following:

[0067] 1. Two or more beam states (e.g., associated with DL or joint TCI states, or QCL type parameters) are associated with the activated beam code point;

[0068] 2. An RRC parameter is provided to indicate that a TCI status indication field is present in the DCI;

[0069] 3. The control resource set (CORESET) corresponding to the fourth command includes at least one of the following:

[0070] 3a. A CORESET other than CORESET0 (CORESET with index 0) is associated only with a UE-specific search space (USS) set and / or a Type 3-PDCCH common search space (CSS) set;

[0071] 3b. The CORESET is configured (e.g., by RRC) to follow the TCI state indicated for PDCCH reception on the CORESET; or

[0072] 3c. The CORESET is CORESET0 (CORESET with index 0), or the CORESET is associated with one or more CSS sets other than the Type 3-PDCCH CSS set.

[0073] In some embodiments, the beam state indication field is absent in the fourth command, for example, when at least one of the above conditions is not met. Under such circumstances, the beam state at the indicated code point is applied to the PDSCH transmission. Alternatively or additionally, the beam state valid / applicable for the transmission opportunity of the PDSCH transmission is applied to the PDSCH transmission. The application of the beam state can be performed regardless of the PDSCH scheduling offset (e.g., greater than, equal to, or less than a threshold).

[0074] Further, candidate values ​​for the beam state indication field (e.g., TCI state indication field) include (1) a first value for the first beam state, (2) a second value for the second beam state, and (3) one or more values ​​for both the first and second beam states. The one or more values ​​for "both the first and second beam states" may include a third value corresponding to having both the first beam state and the second beam state for transmission. The third value corresponding to having both the first beam state and the second beam state for transmission further includes at least one of values ​​corresponding to the following: a value corresponding to having both the first and second beam states for a resource group of transmission; a value corresponding to having a first beam state for a first resource group of transmission followed by a second beam state for a second resource group of transmission; or a value corresponding to having a second beam state for a first resource group of transmission followed by a first beam state for a second resource group of transmission.

[0075] In some embodiments, the beam state indication field may indicate whether one or more valid TCI states apply to each DMRS port or to all DMRS ports of a given PDSCH transmission.

[0076] 5 shows an example signaling framework according to one or more embodiments of the present technology. The example signaling framework shown in FIG. 4 includes RRC+MAC-CE+DCI (TCI code point indication field: down-selection for code point)+DCI format 1_1 / 2 (TCI state indication field for scheduling PDSCH). That is, there are four levels of selection for indicating the beam state: TCI / beam state set → a part (combination) of it → one code point of the part → one or more TCI states from the code point.

[0077] In some embodiments, the TCI status indication field is present in the DCI signaling when at least one of the following conditions is met:

[0078] (1) Separated from TCI_present_in_DCI. The presence of a TCI state in DCI may or may not be indicated by a field.

[0079] (2) Two or more TCI states (e.g., DL or joint TCI states, or QCL type parameters) are associated with the activated TCI codepoint; or

[0080] (3) RRC signaling (e.g., a new RRC parameter) indicating whether a TCI status indication field is present in the DCI.

[0081] If the TCI state indication field is not present, the TCI state of the indicated TCI codepoint applies to the PDSCH transmission scheduled by the DCI. Otherwise, the TCI state further indicated by the TCI state indication field applies. In some embodiments, the TCI state includes the TCI state valid / indicated for the PDSCH transmission opportunity. In some embodiments, the DCI includes DCI format 1_1 / 2.

[0082] In some embodiments, the DCI signaling message scheduling the PDSCH transmission includes only a TCI state indication field, rather than both a TCI codepoint indication field and a TCI state indication field.

[0083] In some embodiments, the candidate values ​​of the TCI status indication field include "1st" indicating the first TPR, "2nd" indicating the second TPR, and "both" indicating both the first and second TPRs, where "both" can refer to at least one of "1st-2nd," "2nd-1st," "SFN," "CJT," or "NCJT"-TDM / FDM / SDM. The candidate values ​​can be configured by RRC.

[0084] In some embodiments, the TCI state indication field of the RRC signaling or an RRC parameter may indicate whether the two TCI states at the indicated codepoint apply to each DMRS port or to all DMRS ports associated with the PDSCH transmission.

[0085] In some embodiments, for PDSCHs with a scheduling offset less than a threshold, at least one of the following schemes is considered:

[0086] Scheme 1-1: The beam state indication field of the fourth command indicates one or more beam states for PDSCH transmission, regardless of the value of the scheduling offset. This is due to the fact that, from the UE's perspective, the beam buffer (analog) is determined in advance before receiving the signaling. The pool of valid beam states (e.g., selected beam states) indicated by the third command (e.g., the beam code point field in the DCI) can provide a clear indication of the UE's behavior regarding how to buffer the beams in advance. Correspondingly, for a given PDSCH reception by the UE, demodulation / decoding can be performed in a digital field and is not related to the scheduling offset threshold. In such a case, the UE can use UE capability signaling to indicate its support for multiple default beams (e.g., "two default beams") to the base station.

[0087] Scheme 1-2: A specific beam state is applied to the PDSCH. The specific beam state includes at least one of the following: (1) the first beam state, (2) a beam state indicated by a higher layer signaling message such as MAC-CE or RRC, (3) a beam state associated with a given time unit, or (4) a beam state associated with a CORESET having a specific identifier (e.g., the lowest ID). The CORESET may be associated with the same association entry / parameters as the PDSCH. In some embodiments, the CORESET is monitored (e.g., by the UE). In some embodiments, the CORESET with the specific identifier is in the latest slot of transmission. That is, the beam state is associated with the CORESET with the lowest ID in the latest slot of transmission.

[0088] Whether Scheme 1-1 or Scheme 1-2 is used is determined by RRC or MAC-CE based on UE capabilities and / or base station configuration. In some embodiments, the above scheme is only applicable to UEs operating in Frequency Range 2 (FR2). This is due to the fact that in FR2, a UE needs to use two or more analog beams established simultaneously by two or more UE antenna panels, and having two or more UE antenna panels is up to the UE capabilities / implementation.

[0089] In some embodiments, the PDSCH is scheduled by DCI format 1_0, which does not include any TCI / beam state indication field. In these cases, at least one of the following is considered:

[0090] Scheme 2-1: The beam state applied to the CORESET or search space set for scheduling the PDSCH is applied to the PDSCH.

[0091] In some embodiments, only one beam state is applied in CORESET, and the same beam state is applied to the PDSCH.

[0092] In some embodiments, two or more beam states are applied to the CORESET. Both or all of the two or more beam states can be applied to the PDSCH (Scheme 2-1a). Alternatively, one specific beam state of the two or more beam states is applied (Scheme 2-1b). The one specific beam state includes at least one of the following: (1) the first beam state of the two or more beam states, or (2) a beam state predetermined for each CORESET or search space set. Whether Scheme 2-1a or Scheme 2-1b is applied is based on UE capabilities or can be configurable by RRC or MAC-CE. Due to energy saving concerns or UE capability limitations, having two or more valid beam states by default increases the complexity of UE implementation. Furthermore, as a condition, the CORESET can only be associated with one TCI state, a scheduling offset of the PDSCH ≥ threshold, or FR-1.

[0093] Scheme 2-2: A specific beam state is applied to the PDSCH. The specific beam state includes at least one of the following: (1) the first beam state, (2) a beam state indicated by a higher layer signaling message such as MAC-CE or RRC, (3) a beam state associated with a given time unit, or (4) a beam state associated with a CORESET having a specific identifier (e.g., the lowest ID). The CORESET may be associated with the same association entry / parameters as the PDSCH. In some embodiments, the CORESET is monitored (e.g., by the UE). In some embodiments, the CORESET with the specific identifier is in the latest slot of transmission. That is, the beam state is associated with the CORESET with the lowest ID in the latest slot of transmission.

[0094] In some embodiments, beam code points are associated with association entries / parameters. That is, given an association entry, only one beam code point is activated and the beam state of the beam code point is applied. As an example, when only one beam code point is activated, the following two cases may occur:

[0095] Case 1: RRC+MAC-CE+DCI format 1_0 (to schedule PDSCH).

[0096] Case 2: RRC+MAC-CE+DCI format 1_1 / 2 (to schedule PDSCH).

[0097] As another example, two beam code points are activated in MAC-CE, each of which is associated with a different association entry / parameter. Then, the two beam code points are applied.

[0098] Regarding dynamic switching between CJT / SFN and NCJT, the switching can be enabled by a beam state indication (e.g., a new field in the DCI) that indicates the beam state corresponding to the transmission mode. If the UE does not support dynamic switching, the switching can also be enabled using semi-static configuration by RRC.

[0099] (Beam direction for CSI-RS in S-DCI based mTRP)

[0100] The CSI-RS has three time domain behaviors: aperiodic, semi-persistent, and periodic.

[0101] For aperiodic CSI-RS (AP-CSI-RS), the beam state applied to the AP-CSI-RS can be determined according to an indication field in a DCI command (e.g., DCI format 0_0 / 1 / 2). The indication field includes at least one of an SRS resource set indicator and / or a beam state indication field. The beam state indication field can be introduced as a new field in DCI format 0_1 / 2.

[0102] For example, the TCI state applied to the AP-CSI-RS may be determined according to an SRS resource set indicator (e.g., according to the first or second TCI state), additional association parameters, and / or a new TCI state indication field for the AP-CSI-RS / PUSC. Furthermore, association parameters for indicating which TCI state is applied to the AP-CSI-RS may be configured per CORESET / SS set. Association parameters for the AP-CSI-RS may also be configured per CSI-RS resource, CSI-RS resource set, CSI-RS configuration, CSI-RS configuration, or CSI-RS trigger state.

[0103] If the trigger offset for the AP-CSI-RS is less than the threshold, the following scheme may be considered.

[0104] Scheme 3-1: The beam state applied to the AP-CSI-RS is still determined based on the indication field of the DCI command or association parameters for the AP-CSI-RS, regardless of the scheduling offset.

[0105] Scheme 3-2: A specific beam state is applied to the PDSCH. The specific beam state includes at least one of the following: (1) the first beam state, (2) a beam state indicated by a higher layer signaling message such as MAC-CE or RRC, (3) a beam state associated with a given time unit, or (4) a beam state associated with a CORESET having a specific identifier (e.g., the lowest ID). The CORESET may be associated with the same association entry / parameters as the PDSCH. In some embodiments, the CORESET is monitored (e.g., by the UE). In some embodiments, the CORESET with the specific identifier is in the latest slot of transmission. That is, the beam state is associated with the CORESET with the lowest ID in the latest slot of transmission.

[0106] Scheme 3-3: The beam / TCI state applied to a given CORESET is applied to the AP-CSI-RS. The given CORESET may be the latest monitored CORESET with the lowest ID, or the first CORESET indicated by MAC-CE / RRC or with a time unit pattern.

[0107] Whether Scheme 3-1, Scheme 3-2, or Scheme 3-3 is used may be based on UE capabilities or may be configurable by RRC or MAC-CE. Furthermore, in the trigger state or configuration of the AP-CSI-RS, the setting / configuration may be further associated with an indication of the first, second, or both beam / TCI states that may be applied to the AP-CSI-RS.

[0108] With respect to semi-persistent CSI-RS (SP-CSI-RS) and periodic CSI-RS (P-CSI-RS), the following may be considered:

[0109] (1) SP-CSI-RS / P-CSI-RS association parameters may be configured per CSI-RS resource / CSI-RS resource set / CSI-RS setting / configuration.

[0110] (2) Time domain parameters (eg, time domain offset) may be provided simultaneously (eg, within a TCI state).

[0111] When activating SP-CSI-RS transmission, association parameters of the SP-CSI-RS can be provided in the MAC-CE. Furthermore, time-domain parameters (e.g., time-domain offset) can be associated with the beam state.

[0112] (Beam indication for PDSCH in M-DCI based mTRP)

[0113] For a PDSCH with a scheduling offset greater than or equal to the threshold, there is sufficient time for the UE to determine that the PDSCH should follow the beam state associated with the same identifier (e.g., CORESETPoolId) as the scheduling PDCCH / DCI.

[0114] For PDSCHs with a scheduling offset smaller than the threshold, on the other hand, the following scheme may be considered.

[0115] Scheme 4-1: Regardless of the scheduling offset, the beam state associated with the same CORESET pool of CORESETs is applied.

[0116] Scheme 4-2: A specific beam state is applied to the PDSCH. The specific beam state includes at least one of the following: (1) the first beam state, (2) a beam state indicated by a higher layer signaling message such as MAC-CE or RRC, (3) a beam state associated with a given time unit, or (4) a beam state associated with a CORESET having a specific identifier (e.g., the lowest ID). The CORESET may be associated with the same association entry / parameters as the PDSCH. In some embodiments, the CORESET is monitored (e.g., by the UE). In some embodiments, the CORESET with the specific identifier is in the latest slot of transmission. That is, the beam state is associated with the CORESET with the lowest ID in the latest slot of transmission.

[0117] Whether scheme 4-1 or scheme 4-2 is used may be based on UE capabilities or may be configurable by RRC or MAC-CE.

[0118] Beam direction for CSI-RS in M-DCI-based mTRP

[0119] In some embodiments, coresetPoolIndex may be an association entry / parameter. For P-CSI-RS / SP-CSI-RS, coresetPoolIndex may be configured per CSI-RS resource, CSI-RS resource set, CSI-RS resource configuration, or reporting configuration. Then, the beam state associated with the same coresetPoolIndex can be applied to the CSI-RS. In some embodiments, time domain parameters (e.g., time domain offset) can be provided simultaneously. For example, the time domain parameters can be associated with the beam state (e.g., provided by RRC).

[0120] With respect to AP-CSI-RS, the following options may be considered:

[0121] Option-1: The coresetPoolIndex is determined according to the PDCCH / CORESET that triggers the AP-CSI-RS, and then the beam state associated with the same coresetPoolIndex may be applied to the CSI-RS.

[0122] Option-2: coresetPoolIndex may be configured per CSI-RS resource, CSI-RS resource set, CSI-RS resource setting or CSI reporting configuration.

[0123] If the AP-CSI-RS trigger offset is less than the threshold, the following schemes may be considered.

[0124] Scheme 5-1: Regardless of the scheduling offset, the beam state associated with the same CORESET pool of CORESETs is applied.

[0125] Scheme 5-2: A specific beam state is applied to the PDSCH. The specific beam state includes at least one of the following: (1) the first beam state, (2) a beam state indicated by a higher layer signaling message such as MAC-CE or RRC, (3) a beam state associated with a given time unit, or (4) a beam state associated with a CORESET having a specific identifier (e.g., the lowest ID). The CORESET may be associated with the same association entry / parameters as the PDSCH. In some embodiments, the CORESET is monitored (e.g., by the UE). In some embodiments, the CORESET with the specific identifier is in the latest slot of transmission. That is, the beam state is associated with the CORESET with the lowest ID in the latest slot of transmission.

[0126] Whether Scheme 5-1 or Scheme 5-2 is used may be based on UE capabilities or may be configurable by RRC or MAC-CE. Furthermore, in a trigger state or configuration, the CSI-RS setting / configuration may be further associated with a coresetPoolIndex.

[0127] FIG. 6 is a flowchart diagram of a method 600 for digital communication in accordance with one or more embodiments of the present technology. The method 600 includes, at operation 610, determining one or more beam states associated with a transmission from a base station to a terminal device. In the method 600, multiple channels and reference signals are associated with a single beam state (e.g., using a unified TCI framework). The method 600 also includes, at operation 620, performing a transmission according to the one or more beam states. The beam state includes at least one of a transmission configuration indicator (TCI) state, a quasi-co-location (QCL) state, a spatial relationship, a reference signal (RS), a spatial filter, or a precoding matrix. The beam state may correspond to at least one of a port associated with the transmission, a port group associated with the transmission, a reference signal resource associated with the transmission, or a reference signal resource set associated with the transmission. The transmission includes at least one of a physical downlink control channel (PDCCH) transmission, a physical downlink shared channel (PDSCH) transmission, or a channel state information reference signal (CSI-RS) transmission.

[0128] In some embodiments, a method includes transmitting, by a base station to a terminal device, a first signaling message (e.g., an RRC) configuring a plurality of beam states, and transmitting, by the base station, a second signaling message (e.g., a MAC CE) to the terminal device to activate one or more beam code points. Each of the one or more beam code points corresponds to at least one beam state of the plurality of beam states. The method includes transmitting, by the base station, a first downlink control information (DCI) message to the terminal device. The first DCI message includes a first field indicating a beam code point from the one or more beam code points activated by the second signaling message, and a pool of beam states or a selected beam state can be determined according to the beam code point. The method also includes transmitting, by the base station to the terminal device, a second DCI message scheduling a transmission. One or more beam states are applied to the transmission, and the one or more beam states are from a selected beam state or a specific beam state.

[0129] In some embodiments, a method includes receiving, by a terminal device, from a base station a first signaling message (e.g., an RRC) configuring a plurality of beam states, and receiving, by the terminal device, from the base station a second signaling message activating one or more beam code points (e.g., MAC CE). Each of the one or more beam code points corresponds to one or more beam states of the plurality of beam states. The method includes receiving, by the terminal device, a first downlink control information (DCI) message from the base station. The first DCI message includes a first field indicating a beam code point from the one or more beam code points activated by the second signaling message. The method includes determining a pool of beam states or a selected beam state according to the beam code point, and receiving, by the terminal device, a second DCI message from the base station scheduling a transmission. One or more beam states are applied to the transmission, and the one or more beam states are from the selected beam state or a specific beam state.

[0130] In some embodiments, a second field is present in the second DCI message to indicate one or more beam states. Candidate values ​​for the second field include at least one of a first value corresponding to having a first beam state for transmission, a second value corresponding to having a second beam state for transmission, and a third value corresponding to having both the first beam state and the second beam state for transmission. In some embodiments, the third value corresponding to having both the first beam state and the second beam state for transmission further includes at least one of a value corresponding to having both the first and second beam states for a resource group for transmission, a value corresponding to having a first beam state for a first resource group for transmission followed by a second beam state for a second resource group for transmission, or a value corresponding to having a second beam state for a first resource group for transmission followed by a first beam state for a second resource group for transmission. In some embodiments, the resource group includes at least one of a reference signal port, a reference signal port group, a reference signal resource, a reference signal resource set, a resource block (RB) group, or a transmission repetition. In some embodiments, the third value is associated with a non-coherent joint transmission mode, a coherent joint transmission mode, a single frequency network mode, a first mode in which first and second beam states are applied to respective demodulation reference signal (DMRS) port groups of transmission, and / or a second mode in which first and second beam states are applied to DMRS ports of transmission.

[0131] In some embodiments, the second field is present in the second DCI signaling because certain conditions are met, including at least one of the following: (1) the pool of beam states or the selected beam state includes two or more beam states associated with the QCL type parameter, (2) one of the one or more beam code points corresponds to two or more beam states associated with the QCL type parameter, (3) the presence of the second field is configured by a higher layer signaling message, or (4) the control resource set corresponding to the second DCI signaling has an index of 0, is associated with a terminal device-specific search space or a Type 3 common search space, or is configured to follow one or more beam states or valid / selected beam states (e.g., in the pool of beam states).

[0132] In some embodiments, the candidate values ​​of the second field are configured by a higher layer signaling message. In some embodiments, the second field indicates whether multiple beam states within a pool of beam states (e.g., within a selected beam state) are applied to each demodulation reference signal (DMRS) port or DMRS ports of the transmission.

[0133] In some embodiments, the second field associated with the beam state indication is not present in the second DCI message, and (1) all beam states within the pool of beam states (e.g., within the selected beam states) are applied to the transmission, or (2) a subset of the beam states within the pool of beam states (e.g., within the selected beam states) are applied to the transmission (e.g., a particular beam is applied to the transmission).

[0134] In some embodiments, the second DCI message includes a format that is at least one of DCI format 1_1 or DCI format 1_2.

[0135] In some embodiments, the transmission is related to a channel state information (CSI) reference signal (RS), and the second DCI message indicates an association between one or more beam states from an available pool of beam states (e.g., from a selected beam state) and the CSI-RS. In some embodiments, a second field or a third field associated with a sounding reference signal (SRS) resource set indicator in the second DCI message indicates the association.

[0136] In some embodiments, the transmission is associated with a channel state information (CSI) reference signal (RS), where an association between one or more beam states and a CSI-RS is configured for a CSI-RS resource, a CSI-RS resource set, a CSI-RS resource configuration, a CSI reporting configuration, a trigger state, a CORESET, or a search space set.

[0137] In some embodiments, the second DCI message includes a format that is at least one of DCI format 0_0, DCI format 0_1, or DCI format 0_2.

[0138] In some embodiments, the time domain parameters for the periodic or semi-persistent CSI-RS are associated with the beam state, hi some embodiments, the time domain parameters include at least one of the time domain offsets.

[0139] In some embodiments, the determination of one or more beam states is based on association parameters carried in the DCI message or associated with a control resource set (CORESET) corresponding to the DCI message. In some embodiments, one or more beam states from a pool of beam states (e.g., from selected beam states) are determined based on time units of a transmission or DCI message, or the beam state of an indicated beam code point applies to transmissions associated with the same association parameters as the beam state, or the pool of beam states (e.g., from selected beam states) includes at least one beam state valid for each association parameter. In some embodiments, the association parameters are indicated by a control resource set pool identifier.

[0140] In some embodiments, the second DCI message includes DCI format 1_0. In some embodiments, (1) a selected beam state is applied to the transmission, or (2) a specific beam state is applied to the transmission. In some embodiments, a selected beam state is applied to the transmission, and the terminal device is configured with two or more default beam states.

[0141] In some embodiments, one or more beam states applied to a control resource set or search space set for scheduling a transmission are applied to the transmission. In some embodiments, one or more beam states associated with the control resource set are applied to the transmission in response to (1) the control resource set being associated with a single beam state, (2) a schedule offset for the transmission being equal to or greater than a threshold, (3) a QCL type (e.g., QCL Type D) or spatial relationship not being applicable or configured, or (4) the transmission being within a first frequency range.

[0142] In some embodiments, two or more beam states are applied to a control resource set or search space set configured to schedule a transmission, and a specific beam state is applied to the transmission, the specific beam state including at least one of a first beam state of the two or more beam states, a first beam state in a pool of beam states (e.g., in a selected beam state), or a beam state configured for the control resource set or search space set.

[0143] In some embodiments, a specific beam state is applied to the transmission, the specific beam state including at least one of a first beam state in a pool of beam states (e.g., in a selected beam state), a beam state indicated by a higher layer signaling message, a beam state associated with a given time unit, or a beam state associated with a control resource set.

[0144] In some embodiments, the control resource set has a specific identifier, is associated with the transmission, is monitored, or is in the most recent slot of the transmission. In some embodiments, a specific beam state or all beam states within a pool of beam states (e.g., within selected beam states) are applied to the transmission based on the capabilities or configuration parameters of the terminal device. In some embodiments, the scheduling offset of the transmission is less than a threshold.

[0145] 7 illustrates an example of a wireless communication system 700 to which one or more embodiments of the present technology may be applied. The wireless communication system 700 may include one or more base stations (BSs) 705a, 705b, one or more wireless devices (UEs) 710a, 710b, 710c, and 710d, and a core network 725. The base stations 705a, 705b can provide wireless service to user devices 710a, 710b, 710c, and 710d in one or more wireless sectors. In some implementations, the base stations 705a, 705b include directional antennas that generate two or more directional beams to provide wireless communication coverage in different sectors. The core network 725 can communicate with the one or more base stations 705a, 705b. The core network 725 provides connectivity with other wireless communication systems and wired communication systems. The core network may include one or more service subscription databases for storing information related to subscribed user devices 710a, 710b, 710c, and 710d. A first base station 705a may provide wireless service based on a first radio access technology, and a second base station 705b may provide wireless service based on a second radio access technology. The base stations 705a and 705b may be co-located or may be separately installed in the field depending on the deployment scenario. The user devices 710a, 710b, 710c, and 710d may support multiple different radio access technologies. The techniques and embodiments described herein may be implemented by the base stations of the wireless devices described herein.

[0146] 8 is a block diagram representation of a portion of a radio station to which one or more embodiments of the present technology may be applied. A radio station 805, such as a network node, a base station, or a wireless device (or user device UE), may include processor electronics 810, such as a microprocessor, that implements one or more of the wireless technologies presented herein. The radio station 805 may include transceiver electronics 815 that transmit and / or receive wireless signals via one or more communication interfaces, such as an antenna 820. The radio station 805 may include other communication interfaces for transmitting and receiving data. The radio station 805 may include one or more memories (not explicitly shown) configured to store information such as data and / or instructions. In some implementations, the processor electronics 810 may include at least a portion of the transceiver electronics 815. In some embodiments, at least some of the disclosed techniques, modules, or functionality are implemented using the radio station 805. In some embodiments, the radio station 805 may be configured to perform the methods described herein.

[0147] The disclosed and other embodiments, modules, and functional operations described herein can be implemented in digital electronic circuitry, or in computer software, firmware, or hardware, including the structures disclosed herein and their structural equivalents, or in one or more combinations thereof. The disclosed and other embodiments can be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a computer-readable medium for execution by or controlling the operation of a data processing apparatus. The computer-readable medium can be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of matter providing a machine-readable propagated signal, or one or more combinations thereof. The term "data processing apparatus" encompasses all apparatuses, devices, and machines for processing data, including, by way of example, a programmable processor, a computer, or multiple processors or computers. In addition to hardware, an apparatus can include code that creates an execution environment for the computer program in question, such as code constituting processor firmware, a protocol stack, a database management system, an operating system, or one or more combinations thereof. A propagated signal is an artificially generated signal, such as a machine-generated electrical, optical, or electromagnetic signal, that is generated to encode information for transmission to an appropriate receiving device.

[0148] A computer program (also known as a program, software, software application, script, or code) can be written in any form of programming language, including compiled or interpreted languages, and can be deployed in any form, including as a stand-alone program or as modules, components, subroutines, or other units suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program can be stored as part of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), in a single file dedicated to the program in question, or in multiple cooperating files (e.g., files storing one or more modules, subprograms, or portions of code). A computer program can be deployed to be executed on one computer or on multiple computers located at one site or distributed across multiple sites and interconnected by a communications network.

[0149] The processes and logic flows described herein can be performed by one or more programmable processors executing one or more computer programs to perform functions by manipulating input data and generating output. The processes and logic flows can also be performed by, and an apparatus can be implemented as, special purpose logic circuitry, such as an FPGA (field programmable gate array) or an ASIC (application-specific integrated circuit). Processors suitable for executing computer programs include, by way of example, both general-purpose and special purpose microprocessors, and any one or more processors of any kind of digital computer. Generally, a processor receives instructions and data from a read-only memory or a random-access memory, or both. The essential elements of a computer are a processor for executing instructions and one or more memory devices for storing instructions and data. Generally, a computer also includes one or more mass storage devices, such as magnetic, magneto-optical, or optical disks, for storing data, or is operably coupled to receive data from them, transfer data to them, or both. However, a computer need not have such devices. Computer-readable media suitable for storing computer program instructions and data include, by way of example, all forms of non-volatile memory, media, and memory devices, including semiconductor memory devices such as EPROM, EEPROM, and flash memory devices; magnetic disks, e.g., internal hard disks or removable disks; magneto-optical disks; and CD-ROM and DVD-ROM disks. The processor and the memory can be supplemented by, or incorporated in, special purpose logic circuitry.

[0150] While this patent document contains many details, these should not be construed as limitations on the scope of any invention or what may be claimed, but rather as descriptions of features that may be specific to particular embodiments of a particular invention. Certain features described in this patent document in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable subcombination. Furthermore, while features may be described above as acting in particular combinations and initially claimed as such, one or more features from a claimed combination may, in some cases, be cut from the combination, and the claimed combination may be directed to a subcombination or a variation of the subcombination.

[0151] Similarly, although operations are shown in the figures in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown, or in any sequential order, or that all of the operations shown be performed, to achieve desirable results. Further, the separation of various system components in the embodiments described in this patent document should not be understood as requiring such separation in all embodiments.

[0152] Only some implementations and examples have been described; other implementations, extensions and variations can be made based on what is described and illustrated in this patent document.

Claims

1. 1. A method for wireless communication, the method comprising: a base station transmitting a first signaling message to a terminal device, the first signaling message configuring a plurality of transmission configuration indicator (TCI) states; the base station transmitting a second signaling message to the terminal device, the second signaling message activating one or more TCI states corresponding to one or more TCI code points; The base station transmits a first Downlink Control Information (DCI) message to the terminal device, the first DCI message including a first field indicating a TCI codepoint from the one or more TCI codepoints corresponding to the one or more TCI states activated by the second signaling message, and one or more selected TCI states are determined according to the TCI codepoint; the base station transmitting a second DCI message to the terminal device scheduling transmission; The base station performs the transmission using a specific TCI state, the specific TCI state being applied to a downlink channel associated with an association entry identical to the specific TCI state; Including, If an offset between the reception of the second DCI message and the scheduled transmission is less than a threshold, the specific TCI state is a first TCI state in the one or more selected TCI states.

2. 2. The method of claim 1, wherein the second DCI message includes a second field indicating one or more TCI states of the one or more selected TCI states, and candidate values ​​for the second field include at least one of a first value corresponding to having the first TCI state for the transmission, a second value corresponding to having a second TCI state for the transmission, or a third value corresponding to having both the first TCI state and the second TCI state for the transmission.

3. 3. The method of claim 2, wherein the third value is associated with a mode in which the first TCI state and the second TCI state are applied to a demodulation reference signal (DMRS) port of the transmission.

4. 4. The method of claim 2 or 3, wherein whether the second field is present in the second DCI message is configured by a higher layer signaling message, the specific TCI state is determined according to a time unit of the transmission, and the transmission is a Physical Downlink Shared Channel (PDSCH) transmission.

5. The method according to any one of claims 1 to 3, wherein the second DCI message comprises a format that is at least one of DCI format 1_1 or DCI format 1_2.

6. 1. A method for wireless communication, the method comprising: receiving, by a terminal device, a first signaling message from a base station, the first signaling message configuring a plurality of transmission configuration indicator (TCI) states; receiving, by the terminal device, from the base station, a second signaling message activating one or more TCI states corresponding to one or more TCI code points; the terminal device receiving, from the base station, a first Downlink Control Information (DCI) message, the first DCI message including a first field indicating a TCI codepoint among the one or more TCI codepoints corresponding to the one or more TCI states activated by the second signaling message, and one or more selected TCI states being determined according to the TCI codepoint; receiving, by the terminal device, from the base station, a second DCI message scheduling transmission; the terminal device receiving the transmission using a specific TCI state, the specific TCI state being applied to a downlink channel associated with the same association entry as the specific TCI state; Including, If an offset between the reception of the second DCI message and the scheduled transmission is less than a threshold, the specific TCI state is a first TCI state in the one or more selected TCI states.

7. 7. The method of claim 6, wherein the second DCI message includes a second field indicating one or more TCI states of the one or more selected TCI states, and candidate values ​​for the second field include at least one of a first value corresponding to having the first TCI state for the transmission, a second value corresponding to having a second TCI state for the transmission, or a third value corresponding to having both the first TCI state and the second TCI state for the transmission.

8. 8. The method of claim 7, wherein the third value is associated with a mode in which the first TCI state and the second TCI state are applied to a demodulation reference signal (DMRS) port of the transmission.

9. 9. The method of claim 7 or 8, wherein whether the second field is present in the second DCI message is configured by a higher layer signaling message, the specific TCI state is determined according to a time unit of the transmission, and the transmission is a Physical Downlink Shared Channel (PDSCH) transmission.

10. The second DCI message includes at least one of DCI format 1_1 and DCI format 1_2. How to post.

11. 1. A communication device, the communication device comprising: at least one processor; transmitting a first signaling message to a terminal device, the first signaling message configuring a plurality of transmission configuration indicator (TCI) states; transmitting a second signaling message to the terminal device activating one or more TCI states corresponding to one or more TCI code points; transmitting a first Downlink Control Information (DCI) message to the terminal device, the first DCI message including a first field indicating a TCI codepoint among the one or more TCI codepoints corresponding to the one or more TCI states activated by the second signaling message, and one or more selected TCI states are determined according to the TCI codepoint; transmitting a second DCI message to the terminal device scheduling transmission; performing the transmission using a specific TCI state, the specific TCI state being applied to a downlink channel associated with the same association entry as the specific TCI state; and If an offset between the reception of the second DCI message and the scheduled transmission is less than a threshold, the specific TCI state is a first TCI state in the one or more selected TCI states.

12. 12. The communications device of claim 11, wherein the second DCI message includes a second field indicating one or more TCI states of the one or more selected TCI states, and candidate values ​​for the second field include at least one of a first value corresponding to having the first TCI state for the transmission, a second value corresponding to having a second TCI state for the transmission, or a third value corresponding to having both the first TCI state and the second TCI state for the transmission.

13. 13. The communications device of claim 12, wherein the third value is associated with a mode in which the first TCI state and the second TCI state are applied to a demodulation reference signal (DMRS) port of the transmission.

14. 14. The communication device of claim 12 or 13, wherein whether the second field is present in the second DCI message is configured by a higher layer signaling message, the specific TCI state is determined according to a time unit of the transmission, and the transmission is a Physical Downlink Shared Channel (PDSCH) transmission.

15. The communication device according to any one of claims 11 to 13, wherein the second DCI message includes a format that is at least one of DCI format 1_1 or DCI format 1_2.

16. 1. A communication device, the communication device comprising: at least one processor; receiving a first signaling message from a base station, the first signaling message configuring a plurality of transmission configuration indicator (TCI) states; receiving a second signaling message from the base station activating one or more TCI states corresponding to one or more TCI code points; receiving a first Downlink Control Information (DCI) message from the base station, the first DCI message including a first field indicating a TCI codepoint among the one or more TCI codepoints corresponding to the one or more TCI states activated by the second signaling message, and one or more selected TCI states are determined according to the TCI codepoint; receiving a second DCI message from the base station scheduling a transmission; receiving the transmission using a specific TCI state, the specific TCI state being applied to a downlink channel associated with the same association entry as the specific TCI state; and If an offset between the reception of the second DCI message and the scheduled transmission is less than a threshold, the specific TCI state is a first TCI state in the one or more selected TCI states.

17. 17. The communications device of claim 16, wherein the second DCI message includes a second field indicating one or more TCI states of the one or more selected TCI states, and candidate values ​​for the second field include at least one of a first value corresponding to having the first TCI state for the transmission, a second value corresponding to having a second TCI state for the transmission, or a third value corresponding to having both the first TCI state and the second TCI state for the transmission.

18. 20. The communications device of claim 17, wherein the third value is associated with a mode in which the first TCI state and the second TCI state are applied to a demodulation reference signal (DMRS) port of the transmission.

19. 19. The communications device of claim 17 or 18, wherein whether the second field is present in the second DCI message is configured by a higher layer signaling message, the specific TCI state is determined according to a time unit of the transmission, and the transmission is a Physical Downlink Shared Channel (PDSCH) transmission.

20. The communication device according to any one of claims 16 to 18, wherein the second DCI message includes a format that is at least one of DCI format 1_1 or DCI format 1_2.

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