Method and apparatus for multiple default beams and multiple TCI states with single DCI based multi-cell scheduling

Abstract

Methods, systems, devices, and computer programs for determining a default beam for each of a plurality of cells. In one aspect, the method may include receiving, by a UE, a plurality of PDSCHs each associated with a different cell and scheduled by a single DCI; determining, by the UE, that the UE is in an operational state that triggers default beam selection for a plurality of PDSCHs associated with a plurality of cells scheduled by a single DCI; and determining, by the UE, a default beam for each of the plurality of PDSCHs associated with one of the different cells.

Description

Background Art

[0001] The TCI state is used to indicate the transmission configuration of the UE. 3GPP has different categories of QCL relationships. These QCL relationships can be classified into multiple QCL types including A, B, C and D. Summary of the invention

[0002] According to an innovative aspect of the present disclosure, a method for determining a default beam for each of a plurality of cells is disclosed. In one aspect, the method may include receiving, by a UE, a plurality of PDSCHs each associated with a different cell and scheduled by a single DCI; determining, by the UE, that the UE is in an operating state that triggers a default beam selection for each of the plurality of PDSCHs each associated with a different cell scheduled by a single DCI; and determining, by the UE, a default beam for each of the plurality of PDSCHs associated with a cell in the different cells.

[0003] Other aspects include apparatus, systems, and computer programs for performing the actions of the aforementioned methods.

[0004] The innovative method may include other optional features. For example, in some implementations, the method may also include receiving, by the UE from an access node, network signaling that configures the UE to determine a default beam for multiple PDSCHs each associated with a different cell scheduled by a single downlink control information (DCI).

[0005] In some implementations, network signaling configures the UE to determine a default beam for multiple PDSCHs each associated with a different cell scheduled by a single downlink control information (DCI) by configuring the enableDefaultBeamForMCS RRC parameter.

[0006] In some specific implementations, determining, by the UE, that the UE is in an operating state that triggers default beam selection for each of a plurality of PDSCHs may include determining, by the UE, that a tci-PresentInDCI parameter is not enabled.

[0007] In some implementations, determining, by the UE, that the UE is in an operating state that triggers default beam selection for each of a plurality of PDSCHs may include determining, by the UE, whether a scheduling offset between a DCI and a corresponding scheduled PDSCH is shorter than timeDurationForQCL.

[0008] In some implementations, the UE is configured with at least one enhanced CORESET configuration associated with at least one TCI state corresponding to each of the different cells, and the UE receives multiple PDSCHs each associated with the different cells on the enhanced CORESET. In such implementations, determining, by the UE, a default beam for each of the multiple PDSCHs associated with one different cell may include determining, by the UE, a default beam for each of the multiple PDSCHs based on the enhanced CORESET configuration.

[0009] In some specific implementations, determining by the UE a default beam for each of a plurality of PDSCHs based on an enhanced CORESET may include selecting, for each particular PDSCH among the plurality of PDSCHs, at least one TCI state identified by an enhanced CORESET configuration for a cell associated with reception of the particular PDSCH.

[0010] In some implementations, the enhanced CORESET associates (i) a serving cell ID or (ii) a component carrier (CC) index corresponding to each of the different cells with the TCI state.

[0011] In some implementations, the TCI states of the enhanced CORESET are mapped sequentially to different cells in the enhanced CORESET configuration.

[0012] In some implementations, the UE is configured with at least one enhanced CORESET configuration associated with at least one TCI state corresponding to each of different cells that can be scheduled by a single DCI, and the UE receives multiple PDSCHs that are each associated with a CORESET of the different cells that is not configured with the enhanced CORESET configuration. In such implementations, determining, by the UE, a default beam for each of the multiple PDSCHs associated with one different cell may include determining, by the UE, a default beam for each of the multiple PDSCHs based on a CORESET with a lowest ID that is configured with multiple TCI states associated with the different cells.

[0013] In some implementations, the UE is configured with a CORESET configuration that associates at least one TCI state with only one cell. In such implementations, determining, by the UE, a default beam for each of a plurality of PDSCHs associated with a different cell may include using, by the UE, at least one TCI state of a CORESET associated with one cell as a default beam for the PDSCH associated with the one cell, and determining, by the UE, a default beam for each of the other PDSCHs based on a TCI state configured for a CORESET with a lowest index corresponding to each of the other PDSCHs.

[0014] In some implementations, the UE is semi-statically configured to have a TCI state corresponding to each of the different cells that may be scheduled by a single DCI, wherein the TCI state for each of the multiple cells has an associated index value, and the UE has not received a MAC CE for activating a subset of the TCI states. In such implementations, determining, by the UE, a default beam for each of the multiple PDSCHs associated with one different cell may include determining, by the UE, a default beam for each of the PDSCHs associated with the different cells based on a TCI state with a lowest index among the configured TCI states for each of the scheduled cells.

[0015] In some implementations, the UE is semi-statically configured with a TCI state corresponding to each of the different cells, wherein the TCI state for each of the plurality of cells has an associated index value, and the UE has received a MAC CE activating a subset of TCI states for each of the different cells schedulable by a single DCI. In such implementations, determining, by the UE, a default beam for each of a plurality of PDSCHs associated with one different cell may include determining, by the UE, a default beam for each of the PDSCHs associated with the different cells based on a TCI state having a lowest index among the activated TCI states for each of the different cells.

[0016] In some implementations, the UE is semi-statically configured with one or more TCI states corresponding to each of the different cells, the UE has received a MAC CE activating a subset of TCI states for each of the different cells, the index may include multiple TCI states, and each of the TCI states is associated with each of the cells that can be scheduled by a single DCI, and the multiple TCI states are indexed for at least one or more of the cells. In such implementations, determining, by the UE, a default beam for each of the multiple PDSCHs associated with one different cell may include determining, by the UE, a default beam for each of the PDSCHs associated with the different cells based on a lowest TCI index in the activated state.

[0017] In some implementations, the UE is configured with a set of TCI states, wherein the set of TCI states includes a default beam for each of the different cells that may be scheduled by the DCI, and the set of TCI states includes one TCI state for each of the different cells that may be scheduled by the DCI. In such implementations, determining, by the UE, a default beam for each of a plurality of PDSCHs associated with one of the different cells may include determining, by the UE, a default beam for each of a plurality of PDSCHs associated with one of the different cells based on the set of TCI states.

[0018] In some implementations, the UE is configured with multiple groups of TCI states, wherein one group of TCI states in the multiple groups of TCI states includes a default beam for each of the different cells that can be scheduled by the DCI, and wherein each group of TCI states includes one TCI state for each of the different cells that can be scheduled by the DCI. In such implementations, the method may also include receiving, by the UE, a MAC CE that activates a specific TCI group in the multiple TCI groups. In such implementations, determining, by the UE, a default beam for each of a plurality of PDSCHs associated with a cell in the different cells may include determining, by the UE, a default beam for each of a plurality of PDSCHs associated with a cell in the different cells based on the specific group of TCI states activated by the MAC CE.

[0019] According to an innovative aspect of the present disclosure, a method for TCI configuration and indication is disclosed. In one aspect, the method may include the following actions: receiving a set of TCI states corresponding to each of a plurality of cells by a UE; receiving a MAC CE by the UE from a network that activates a set of multiple TCI-to-cell mapping tables, wherein each TCI-to-cell mapping table has one or more entries that associate a TCI table identifier with a plurality of cells that can be scheduled by a single DCI, wherein the TCI table identifier identifies a TCI state table that specifies TCI states for the associated plurality of cells; receiving a single DCI by the UE that schedules a plurality of cells and indicates TCIs for a plurality of scheduled PDSCHs associated with the plurality of cells; determining a TCI-to-cell mapping table from a set of multiple TCI-to-cell mapping tables activated based on the plurality of cells scheduled by the single DCI scheduling by the UE; and using the indicated TCI state from the determined TCI-to-cell mapping table based on the TCI indication in the scheduling DCI by the UE.

[0020] Other aspects include apparatus, systems, and computer programs for performing the actions of the aforementioned methods.

[0021] The innovative method may include other optional features. For example, in some implementations, each TCI to cell mapping table corresponds to a combination of cells that can be configured by the UE.

[0022] In some implementations, receiving, by the UE, a set of TCI states corresponding to each of the plurality of cells may include receiving, from the network, an RRC configuration that configures the UE to include a set of TCI states corresponding to each of the plurality of cells.

[0023] In some implementations, the activated set of multiple TCI-to-cell mapping tables may include (i) a first TCI-to-cell mapping table, wherein the first TCI-to-cell mapping table associates a first TCI table identifier with a first cell and a second cell, wherein each index of a TCI state table identified by the first TCI table identifier includes at least two TCI states corresponding to the first cell and the second cell, and (ii) a second TCI-to-cell mapping table, wherein the second TCI-to-cell mapping table associates a second TCI table identifier with a first cell and a third cell, wherein each index of a TCI state table identified by the second TCI table identifier includes at least two TCI states corresponding to the first cell and the third cell. two TCI states, (iii) a third TCI to cell mapping table, wherein the third TCI to cell mapping table associates a third TCI table identifier with the second cell and the third cell, wherein each index of the TCI state table identified by the third TCI table identifier includes at least two TCI states corresponding to the second cell and the third cell, and (iv) a fourth TCI to cell mapping table, wherein the fourth TCI to cell mapping table associates a fourth TCI table identifier with the first cell, the second cell and the third cell, wherein each index of the TCI state table identified by the fourth TCI table identifier includes at least two TCI states corresponding to the first cell, the second cell and the third cell.

[0024] In some implementations, the received single DCI may schedule the first cell and the second cell. In such implementations, determining, by the UE, a TCI-to-cell mapping table from a set of activated multiple TCI-to-cell mapping tables based on multiple cells scheduled by the single DCI may include: determining, by the UE, based on a determination by the UE that the first cell and the second cell are scheduled by the single DCI, that the first TCI-to-cell mapping table is to be used to indicate a TCI state for the first cell and the second cell.

[0025] In some implementations, the received single DCI may schedule the first cell and the third cell. In such implementations, determining, by the UE, a TCI-to-cell mapping table from a set of activated multiple TCI-to-cell mapping tables based on multiple cells scheduled by the single DCI may include: determining, by the UE, based on a determination by the UE that the first cell and the third cell are scheduled by the single DCI, that a second TCI-to-cell mapping table is to be used to indicate a TCI state for the first cell and the third cell.

[0026] In some implementations, the received single DCI may schedule the second cell and the third cell. In such implementations, determining, by the UE, a TCI-to-cell mapping table from a set of activated multiple TCI-to-cell mapping tables based on multiple cells scheduled by the single DCI may include: determining, by the UE, based on a determination by the UE that the second cell and the third cell are scheduled by the single DCI, that a third TCI-to-cell mapping table is to be used to indicate a TCI state for the second cell and the third cell.

[0027] In some implementations, the received single DCI may schedule the first cell, the second cell, and the third cell. In such implementations, determining, by the UE, a TCI-to-cell mapping table from a set of activated multiple TCI-to-cell mapping tables based on multiple cells scheduled by the single DCI may include: determining, by the UE, based on a determination by the UE that the first cell, the second cell, and the third cell are scheduled by the single DCI, a fourth TCI-to-cell mapping table to be used to indicate a TCI state for the first cell, the second cell, and the third cell.

[0028] In some embodiments, the activated set of multiple TCI-to-cell mapping tables may include (i) a first TCI-to-cell mapping table, wherein the first TCI-to-cell mapping table associates a first TCI table identifier with a first group of cells, wherein each index of a TCI state table identified by the first TCI table identifier includes at least one TCI state corresponding to each cell in the first group of cells, (ii) a second TCI-to-cell mapping table, wherein the second TCI-to-cell mapping table associates a second TCI table identifier with a second group of cells, wherein each index of the TCI state table identified by the second TCI table identifier includes at least one TCI state corresponding to each cell in the second group of cells, and (iii) a third TCI-to-cell mapping table, wherein the third TCI-to-cell mapping table associates a third TCI table identifier with a third group of cells, wherein each index of the TCI state table identified by the third TCI table identifier includes at least one TCI state corresponding to each cell in the third group of cells.

[0029] In some implementations, the received single DCI may schedule the first group of cells. In such implementations, determining, by the UE, a TCI-to-cell mapping table from a set of activated multiple TCI-to-cell mapping tables based on the multiple cells scheduled by the single DCI may include: based on the UE's determination that the first group of cells are scheduled by the single DCI, determining, by the UE, that the first TCI-to-cell mapping table is to be used to indicate a TCI state for the first group of cells.

[0030] In some implementations, the received single DCI may schedule the second group of cells. In such implementations, determining, by the UE, a TCI-to-cell mapping table from a set of activated multiple TCI-to-cell mapping tables based on multiple cells scheduled by the single DCI may include: determining, by the UE, based on a determination by the UE that the second group of cells is scheduled by the single DCI, that a second TCI-to-cell mapping table is to be used to indicate a TCI state for the second group of cells.

[0031] In some implementations, the received single DCI may schedule a third group of cells. In such implementations, determining, by the UE, a TCI-to-cell mapping table from a set of activated multiple TCI-to-cell mapping tables based on multiple cells scheduled by the single DCI may include: determining, by the UE, based on a determination by the UE that the third group of cells is scheduled by the single DCI, that a third TCI-to-cell mapping table is to be used to indicate a TCI state for the third group of cells.

[0032] According to an innovative aspect of the present disclosure, another method for TCI configuration and indication is disclosed. In one aspect, the method may include the following actions: receiving, by a UE, a TCI-to-cell mapping table including a plurality of entries, wherein each entry in the plurality of entries associates a TCI table index with a group of one or more cells that can be scheduled by a single DCI; receiving, by the UE, a MAC CE that activates a subset of TCI table indexes of the configured TCI-to-cell mapping table; receiving, by the UE, a single DCI that schedules a plurality of cells and indicates TCIs for a plurality of scheduled PDSCHs associated with the plurality of cells; determining, by the UE, a TCI table index in the activated TCI table index based on the received single DCI; and using, by the UE, the indicated TCI and applying a TCI state associated with the determined TCI table index to the scheduled cell.

[0033] Other aspects include apparatus, systems, and computer programs for performing the actions of the aforementioned methods.

[0034] The innovative method may include other optional features. For example, in some specific implementations, receiving by the UE a table including multiple entries, wherein each entry in the multiple entries associates a TCI table index with a TCI state for a group of one or more cells that can be scheduled by a single DCI may include: receiving an RRC configuration from a network, the RRC configuration configuring the UE to include a table including multiple entries, wherein each entry in the multiple entries associates a TCI table index with a TCI state for a group of one or more cells that can be scheduled by a single DCI.

[0035] In some embodiments, the activated subset of TCI table indices may include (i) a first TCI table index, wherein the first TCI table index indicates a TCI state for a first group of one or more cells, (ii) a second TCI table index, wherein the second TCI table index indicates a TCI state for a second group of one or more cells, (iii) a third TCI table index, wherein the third TCI table index indicates a TCI state for a third group of one or more cells, and (iv) a fourth TCI table index, wherein the fourth TCI table index indicates a TCI state for a fourth group of one or more cells.

[0036] In some implementations, the first group of one or more cells may include multiple cells, the second group of one or more cells may include multiple cells, the third group of one or more cells may include multiple cells, or the fourth group of one or more cells may include multiple cells.

[0037] In some implementations, the first group of one or more cells may include multiple cells, the second group of one or more cells may include multiple cells, the third group of one or more cells may include multiple cells, and the fourth group of one or more cells may include multiple cells.

[0038] In some implementations, the UE receives a single DCI that schedules a first set of one or more cells. In such implementations, determining a TCI table index in the activated TCI table indexes based on the received single DCI may include determining, by the UE, to use a first TCI table index for the scheduled first set of one or more cells.

[0039] In some implementations, the UE receives a single DCI that schedules a second plurality of cells. In some implementations, determining a TCI table index in the activated TCI table indexes based on the received single DCI may include determining, by the UE, to use a second TCI table index for the scheduled second plurality of cells.

[0040] In some implementations, the UE receives a single DCI that schedules a third set of multiple cells. In such implementations, determining a TCI table index in the activated TCI table indexes based on the received single DCI may include determining, by the UE, to use a third TCI table index for the scheduled third set of multiple cells.

[0041] In some implementations, the UE receives a single DCI that schedules a fourth set of multiple cells. In such implementations, determining a TCI table index in the activated TCI table indexes based on the received single DCI may include determining, by the UE, to use a fourth TCI table index for the scheduled fourth set of multiple cells.

[0042] According to an innovative aspect of the present disclosure, another method for TCI configuration and indication is disclosed. In one aspect, the method may include: receiving, by a UE, a TCI-to-cell mapping table including a plurality of entries, wherein each entry in the plurality of entries associates a TCI table index with a group of one or more cells that can be scheduled by a single DCI; receiving, by the UE, a MAC CE that activates a subset of TCI table indexes of the configured TCI-to-cell mapping table; receiving, by the UE, a single DCI indicating TCI for a plurality of scheduled PDSCHs associated with a plurality of cells; determining, by the UE, a TCI table index in the activated TCI table index based on the received single DCI; and using, by the UE, the indicated TCI and applying a TCI state associated with the determined TCI table index to the scheduled cell.

[0043] In some specific embodiments, receiving, by a UE, a table comprising multiple entries, wherein each entry in the multiple entries associates a TCI table index with a TCI state for a group of one or more cells that can be scheduled by a single DCI may include: receiving an RRC configuration from a network, wherein the RRC configuration configures the UE to include a table comprising multiple entries, wherein each entry in the multiple entries associates a TCI table index with a TCI state for a group of one or more cells that can be scheduled by a single DCI.

[0044] In some implementations, the activated subset of TCI table indexes may include (i) a first TCI table index, wherein the first TCI table index includes a first column indicating a first group of cells including at least the first cell and a second column indicating a TCI state for the first cell, (ii) a second TCI table index, wherein the second TCI table index includes a first column indicating a second group of cells including at least the first cell and a third cell, a second column indicating a TCI state for the first cell, and a third column indicating a TCI state for the second cell, (iii) a third TCI table index, wherein the third TCI table index includes a first column indicating a third group of cells including the first cell and the third cell, a second column indicating a TCI state for the first cell, and a third column indicating a TCI state for the second cell. (iv) a fourth TCI table index, wherein the fourth TCI table index includes a first column indicating a fourth group of cells including the second cell and the third cell, a second column indicating the TCI state for the second cell, and a third column indicating the TCI state for the third cell; (v) a fifth TCI table index, wherein the fifth TCI table index includes a first column indicating a fifth group of cells including the first cell, the second cell, and the third cell, a second column indicating the TCI state for the first cell, a third column indicating the TCI state for the second cell, and a third column indicating the TCI state for the third cell.

[0045] In some implementations, the first group of one or more cells may include multiple cells, the second group of one or more cells may include multiple cells, the third group of one or more cells may include multiple cells, the fourth group of one or more cells may include multiple cells, or the fifth group of one or more cells may include multiple cells.

[0046] In some implementations, the first group of one or more cells may include multiple cells, the second group of one or more cells may include multiple cells, the third group of one or more cells may include multiple cells, the fourth group of one or more cells may include multiple cells, and the fifth group of one or more cells may include multiple cells.

[0047] In some implementations, the received single DCI indicating TCI for multiple scheduled PDSCHs associated with multiple cells includes an indication of a TCI table index.

[0048] In some implementations, the received DCI indicating the TCI corresponds to a first TCI table index. In such implementations, the UE determines, based on a first column of the first TCI table index, that the cells to be scheduled by the received single DCI include a first group of one or more cells.

[0049] In some implementations, the received DCI indicating the TCI corresponds to a second TCI table index. In some implementations, the UE determines, based on a first column of the second TCI table index, that the cells to be scheduled by the received single DCI include a second group of one or more cells.

[0050] In some implementations, the received DCI indicating the TCI corresponds to a first TCI table index. In such implementations, determining the TCI table index in the activated TCI table index based on the received single DCI may include determining, by the UE, to use the first TCI table index, and using, by the UE, the indicated TCI and applying the TCI state in the determined TCI table index to the scheduled cell may include using, by the UE, the indicated TCI and applying the TCI state in the second column of the first TCI table index to the scheduled cell.

[0051] In some implementations, the received DCI indicating the TCI corresponds to a second TCI table index. In such implementations, determining the TCI table index in the activated TCI table index based on the received single DCI may include determining, by the UE, to use the second TCI table index, and using, by the UE, the indicated TCI and applying the TCI state in the determined TCI table index to the scheduled cell may include using, by the UE, the indicated TCI and applying the TCI state in the second column of the second TCI table index and the third column of the second TCI table index to the scheduled cell.

[0052] In some implementations, the received DCI indicating the TCI corresponds to a third TCI table index. In such implementations, determining the TCI table index in the activated TCI table index based on the received single DCI may include determining, by the UE, to use the third TCI table index, and using, by the UE, the indicated TCI and applying the TCI state in the determined TCI table index to the scheduled cell may include using, by the UE, the indicated TCI and applying the TCI state in the second column of the third TCI table index and the third column of the third TCI table index to the scheduled cell.

[0053] In some implementations, the received DCI indicating the TCI corresponds to a fifth TCI table index. In such implementations, determining the TCI table index in the activated TCI table index based on the received single DCI may include determining, by the UE, to use the fifth TCI table index, and using, by the UE, the indicated TCI and applying the TCI state in the determined TCI table index to the scheduled cell may include using, by the UE, the indicated TCI and applying the TCI state in the second column of the third TCI table index, the third column of the fifth TCI table index, and the fourth column of the fifth TCI table index to the scheduled cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 A flow chart of an example of a process for a UE to select a default transmission beam for each of multiple physical data shared channels (PDSCHs) associated with multiple cells using a single downlink control information (DCI).

[0055] Figure 2 A flowchart of an example of a process for TCI configuration and indication.

[0056] Figure 3 Flowchart of an example of another process for TCI configuration and indication.

[0057] Figure 3A Flowchart of an example of another process for TCI configuration and indication.

[0058] Figure 4 is an example of a wireless communication system.

[0059] Figure 5 A block diagram of an example of a user equipment (UE) is shown.

[0060] Figure 6 is a block diagram of an example of an access node.

[0061] Like reference symbols in the various drawings indicate like elements. DETAILED DESCRIPTION

[0062] In 5G NR systems, when a transmission beam or beams (TCIQCL type-D) are indicated by DCI, they are applied to the scheduled PDSCH, but only when timeDurationForQCL (the time offset to apply the indicated beam) is less than or equal to the scheduling offset (which is the time offset between the last symbol of the scheduling DCI and the start symbol of the scheduled PDSCH). In a specific implementation, if the time offset of the beam is longer than the scheduling offset, the default beam is applied to the scheduled PDSCH. In addition, if tci-PresentInDCI is not enabled, the UE is also expected to apply the default beam.

[0063] In conventional systems, a single downlink control information (DCI) can only perform scheduling operations for a single cell. Therefore, when scheduling is performed for N cells (where N is greater than 1), multiple (i.e., N) DCI transmissions need to occur. When the number N increases, this may cause significant signaling overhead to the network.

[0064] The technology of the present disclosure aims to solve this problem by implementing N cell scheduling with only a single DCI transmission, where N is greater than 1 (referred to herein as "multi-cell scheduling"). Using only a single DCI transmission to perform multi-cell scheduling will reduce the signaling overhead of the network, thereby freeing up network resources for other uses. Therefore, the present disclosure provides a scheme for configuring and determining a default beam that can be associated with multiple PDSCHs corresponding to multiple cells scheduled by a single DCI.

[0065] In addition, there is a need to enhance the indication of TCI for multi-cell scenarios through a single DCI. Therefore, in the present disclosure, we also provide a solution for configuring, activating and indicating the TCI status for multiple cells scheduled by a single DCI.

[0066] For the purposes of this disclosure, TCI states refer to transmission configuration indicator (TCI) states. Such TCI states, once determined or otherwise selected using the techniques of this disclosure, can be used by various implementations to indicate configurations such as the QCL relationship between the source RS and the target RS to transmit or receive the target RS and associated channels, for example, the source RS can be a CSI-RS ID, and the target can be a PDSCH DMRS port that can be used by the UE, and the QCL assumption can be type D.

[0067] Default beam determination for multi-cell scheduling overview

[0068] A procedure for default beam determination for multi-cell scheduling overview is disclosed. A UE may be configured via enableDefaultBeamForMCS(multi-cell scheduling), and after being configured with parameters, the UE is expected to be able to determine a default beam for multiple PDSCHs associated with multiple cells scheduled by a single DCI in at least the following cases:

[0069] ■tci-PresentInDCI is not enabled, i.e., the scheduling DCI is expected to contain no TCI indication field and in this case, the PDSCH reception at the UE (antenna port associated with the PDSCH) requires a default beam (e.g., TCI state with QCL Type-D);

[0070] ■ The scheduling offset between the DCI and the corresponding scheduled PDSCH is shorter than timeDurationForQCL, i.e. there is not enough time at the UE between DCI reception and applying the indicated beam at the start of PDSCH reception.

[0071] In such cases, one or more of the following implementations may be used to determine a default beam for each of the PDSCHs associated with the multiple cells.

[0072] In a first specific implementation, for example, a CORESET (associated with a serving cell) for a PDCCH carrying multi-cell scheduling DCI, which is configured to have at least one TCI state corresponding to each cell in the scheduled cells (with a QCL type D assumption), can be used to determine a default beam for each PDSCH in a PDSCH associated with multiple cells.

[0073] In this first specific implementation for determining a default beam for scheduled PDSCHs associated with different cells, the UE is configured with at least one enhanced CORESET configuration associated with at least one TCI state corresponding to each cell in the same cell (which can be scheduled by a single DCI), and the UE receives a PDCCH carrying a multi-cell scheduling DCI on the CORESET configured with the enhanced configuration.

[0074] As an example of this specific implementation, if a serving cell can schedule 4 cells, at least one TCI state corresponding to each of the 4 cells is configured for at least one CORESET associated with the serving cell.

[0075] As an alternative to the first specific implementation, the serving cell ID and / or CC index is also explicitly configured in the enhanced CORESET configuration together with the TCI state.

[0076] As another alternative to the first specific implementation, in another alternative, the TCI states may be mapped to the scheduled cells in sequence, where the scheduled cell IDs and / or CC indexes are separately indicated, for example, via DCI.

[0077] In a second specific implementation, for example, a CORESET (associated with a serving cell) having the lowest CORESET ID and configured to have at least one TCI state (with a QCL type D assumption) corresponding to each of the cells that can be scheduled can be used to determine a default beam for each of the PDSCHs associated with multiple cells.

[0078] In this second specific implementation for determining a default beam for scheduled PDSCHs associated with different cells, the UE is configured to have at least one enhanced CORESET configuration associated with at least one TCI state corresponding to each cell in the same cell (which can be scheduled by a single DCI), and the UE receives a PDCCH carrying a multi-cell scheduling DCI on a CORESET that is not configured with the enhanced configuration, and the UE determines the TCI state for all scheduled cells based on the CORESET with the lowest ID that is configured to have multiple TCI states associated with multiple cells.

[0079] The second implementation is different from the first implementation because the CORESET associated with the received PDCCH for multi-cell scheduling is not configured with multiple TCI states for multiple cells. Therefore, another CORESET configured to the UE with multiple TCI states for multiple cells and with the lowest CORESET ID is used to determine the default beam for all scheduled cells.

[0080] As an example of a second specific implementation, if a CORESET with index 2 is scheduling multiple cells (using a single DCI), but it is not configured to have multiple TCI states for multiple cells, and a CORESET with index 1 is configured to have multiple TCI states for multiple cells, then the TCI state from CORESET index 1 is used to determine the default beam for the scheduled cell.

[0081] In an alternative to this example of the second specific implementation, the default beam for the serving cell may be determined from the TCI state of CORESET Index 2 (if configured).

[0082] In a third specific implementation, for example, a default beam for each PDSCH associated with multiple cells can be determined using a lowest CORESET ID (associated with each of the scheduled cells) that is configured to have at least one TCI state (with a QCL type D assumption) corresponding to the associated cell.

[0083] In this third specific implementation for determining a default beam for a scheduled PDSCH associated with different cells, if the UE is not configured with an enhanced CORESET configuration with multiple TCI states for multiple cells, the UE determines a default beam for the scheduling cell (if scheduled) based on the TCI state of the CORESET configured for the PDCCH associated with the multi-cell scheduling DCI. The UE determines a default beam for other scheduled cells (except the scheduling cell) based on the TCI state of the CORESET configured for the lowest index corresponding to each of the scheduled cells.

[0084] As an example of a third specific implementation, if the serving cell is cell 1 and it schedules cell 1, cell 2, and cell 3, the default beam for cell 1 is based on the TCI state of the CORESET of the serving cell (i.e., cell 1) associated with the scheduling PDCCH, and the default beam for cell 2 is based on the TCI state of the CORESET with the lowest index (such as index 0) associated with cell 2, and similarly, the default beam for cell 2 is based on the TCI state of the CORESET with the lowest index (such as index 0).

[0085] If CORESET index 0 is not configured with TCI, but a higher index (such as index 1) is configured with a TCI state, then the TCI state is used to determine the default beam for the corresponding cell.

[0086] In a fourth specific implementation, for example, the default beam for each of the PDSCHs associated with multiple cells may be determined using the activated TCI state with the lowest index corresponding to each of the scheduled cells.

[0087] In this fourth specific implementation for determining a default beam for a scheduled PDSCH associated with different cells, if the UE is semi-statically configured to have a TCI state corresponding to each of the cells, but a subset of TCI states is not activated by the MAC CE, then the default beam for each of the scheduled PDSCHs associated with multiple cells by a single DCI is determined based on the TCI state with the lowest index in the configured states for each of the scheduled cells.

[0088] In a fifth specific implementation, for example, the configured TCI state with the lowest index corresponding to each of the scheduled cells (if not activated) can be used to determine the PDSCH default beam for each of the PDSCHs associated with multiple cells.

[0089] In this fifth specific implementation for determining a default beam for a scheduled PDSCH associated with different cells, if the UE is semi-statically configured to have a TCI state corresponding to each of the cells, and a subset of TCI states for each of the cells is also activated by the MAC CE, then the default beam for each of the scheduled PDSCHs associated with multiple cells by a single DCI is determined based on the TCI state with the lowest index in the activation state for each of the scheduled PDSCHs, respectively. If only some of the cells have the activated TCI state, then for these cells, the configured TCI state can be used for the default beam determination as described in the fourth specific implementation.

[0090] In a sixth specific implementation, for example, the default beam for each PDSCH in PDSCHs associated with multiple cells can be determined using the lowest index from an activated TCI table, where at least one index of the activated TCI table consists of at least the same number of cells scheduled by the DCI.

[0091] In this sixth specific implementation for determining a default beam for a scheduled PDSCH associated with different cells, if the UE is activated with a set of TCI states, where an index may include multiple TCI states and where each of the TCI states is associated with each of the cells that can be scheduled by a single DCI, then the default beam for each of the scheduled cells is based on the lowest TCI index in the activation state, where multiple cells include multiple TCI states.

[0092] The mapping of TCI states (within an index) is mapped to cells in a sequential manner in increasing order. For example, index 0 contains TCI state 3, TCI state 2, and TCI state 7, then cell 0 is mapped to TCI state 3, cell 1 is mapped to TCI state 2, and cell 2 is mapped to TCI state 7.

[0093] In a seventh specific implementation, a dedicated configuration for a default beam is adopted.

[0094] In this seventh specific implementation for determining a default beam for scheduled PDSCH associated with different cells, the UE is configured to have one or more groups of TCI states, wherein each group of TCI states includes a default beam for all serving cells that can be scheduled by DCI, one TCI state for each cell.

[0095] If a single group is configured in the seventh specific implementation, the TCI state is used as the default beam.

[0096] Alternatively, if multiple groups are configured in the seventh specific implementation, one of the groups may be activated by the MAC CE, and the TCI state in the activated group is used as the default beam.

[0097] As an exception to the seventh specific implementation, if the scheduling cell (in which the DCI is transmitted) is also scheduled, the TCI state of the PDSCH follows the TCI state of the CORESET (if configured) on which the DCI is transmitted.

[0098] Figure 1 A flowchart of an example of a process 100 for a UE to select a default transmission beam for each of multiple physical data shared channels (PDSCHs) associated with multiple cells using a single downlink control information (DCI). The process 100 will be described as being performed by a UE such as Figure 4 UE 405 executes.

[0099] The UE may begin performing process 100 (110) by receiving multiple PDSCHs each associated with a different cell and scheduled by a single DCI. In some implementations, the UE is a UE that has been configured, for example, to determine a default beam for each of the multiple PDSCHs each associated with a different cell scheduled by a single downlink control information (DCI).

[0100] The UE may continue to perform process 100 (120) by determining that the UE is in an operating state that triggers default beam selection for each of a plurality of PDSCHs that are each associated with a different cell and scheduled by a single DCI. In some implementations, the UE may determine that the UE is in an operating state that triggers default beam selection for each of a plurality of PDSCHs by determining that a tci-PresentInDCI parameter is not enabled. In some implementations, the UE may determine that the UE is in an operating state that triggers default beam selection for each of a plurality of PDSCHs by determining that a scheduling offset between the DCI and the corresponding scheduled PDSCH is shorter than timeDurationForQCL.

[0101] The UE may continue process 100 by determining a default beam for each of a plurality of PDSCHs associated with one of the different cells (130).

[0102] In some implementations, the UE is configured with at least one enhanced CORESET configuration associated with at least one TCI state corresponding to each of the different cells, and the UE receives a plurality of PDSCHs each associated with the different cells on the enhanced CORESET configuration. In such implementations, the UE's determination at stage 130 may include the UE determining a default beam for each of the plurality of PDSCHs based on the enhanced CORESET. In such implementations, the UE's determination at stage 130 may also include determining a default beam for each of the plurality of PDSCHs based on the enhanced CORESET by selecting, for each particular PDSCH of the plurality of PDSCHs, at least one TCI state identified by the enhanced CORESET configuration for the cell associated with reception of the particular PDSCH. In some implementations, the enhanced CORESET associates (i) a serving cell ID or (ii) a component carrier (CC) index corresponding to each of the different cells with a TCI state. In some implementations, the TCI states of the enhanced CORESET are sequentially mapped to the different cells in the enhanced CORESET configuration.

[0103] For the purposes of this disclosure, the term "enhanced CORESET" is intended to mean a CORESET that includes one or more TCI states associated with each of multiple cells that can be scheduled using a single DCI. In contrast, a non-"enhanced" CORESET only stores one or more TCI states for a single scheduled cell.

[0104] In some implementations, the UE is configured with at least one enhanced CORESET configuration associated with at least one TCI state corresponding to each of the different cells that can be scheduled by a single DCI, and the UE receives multiple PDSCHs each associated with a CORESET of the different cells that is not configured with the enhanced CORESET configuration. In such implementations, the UE's determination at stage 130 may include the UE determining a default beam for each of the multiple PDSCHs based on the CORESET with the lowest ID that is configured with multiple TCI states associated with the different cells.

[0105] In some implementations, the UE is configured with a CORESET configuration that associates at least one TCI state with only one cell. In such implementations, the UE's determination at stage 130 may include determining a default beam for each of the PDSCHs associated with different cells by using, by the UE, at least one TCI state of the CORESET associated with one cell as the default beam for the PDSCH associated with the one cell, and determining, by the UE, the default beam for each of the other PDSCHs based on the TCI state configured for the CORESET with the lowest index corresponding to each of the other PDSCHs.

[0106] In some implementations, the UE is semi-statically configured to have a TCI state corresponding to each of the different cells that may be scheduled by a single DCI, wherein the TCI state for each of the plurality of cells has an associated index value, and the UE has not received a MAC CE for activating a subset of the TCI states. In such implementations, the UE's determination at stage 130 may include determining a default beam for each of the PDSCHs associated with the different cells based on a TCI state having a lowest index among the configured TCI states for each of the scheduled cells.

[0107] In some implementations, the UE is semi-statically configured to have a TCI state corresponding to each of the different cells that can be scheduled by a single DCI, wherein the TCI state for each of the multiple cells has an associated index value. In some implementations, the associated index value may be implicitly determined by, for example, a sequential index. In other implementations, the associated index value may be explicitly determined for the cell corresponding to each of the TCI states. In such implementations, the UE may receive a MAC CE that activates a subset of TCI states for each of the different cells that can be scheduled by a single DCI. In such implementations, the UE's determination at stage 130 may include determining a default beam for each of the PDSCHs associated with the different cells based on the TCI state with the lowest index in the activated TCI states for each of the different cells.

[0108] In some implementations, the UE is semi-statically configured with one or more TCI states corresponding to each of the different cells. In such implementations, the UE may receive a MAC CE activating a subset of TCI states for each of the different cells, wherein the index may include multiple TCI states, and wherein each of the TCI states is associated with each of the cells that may be scheduled by a single DCI. In such implementations, multiple TCI states are indexed for at least one or more of the cells. In such implementations, the UE's determination at stage 130 may include determining a default beam for each of the PDSCHs associated with the different cells based on the lowest TCI index in the activated state.

[0109] In some implementations, the UE is configured with a set of TCI states, wherein the set of TCI states includes a default beam for each of the different cells that may be scheduled by the DCI. In such implementations, the set of TCI states includes one TCI state for each of the different cells that may be scheduled by the DCI. In such implementations, the UE's determination at stage 130 may include determining a default beam for each of a plurality of PDSCHs associated with a cell in the different cells based on the set of TCI states.

[0110] In some implementations, the UE is configured with multiple groups of TCI states, wherein one group of TCI states in the multiple groups of TCI states includes a default beam for each of the different cells that can be scheduled by the DCI, and wherein each group of TCI states includes one TCI state for each of the different cells that can be scheduled by the DCI. In such implementations, the UE may continue to perform process 100 by receiving a MAC CE that activates a specific TCI group in the multiple TCI groups. In such implementations, the UE's determination at stage 1310 may include determining a default beam for each of a plurality of PDSCHs associated with a cell in the different cells based on the specific group of TCI states activated by the MAC CE.

[0111] In some implementations, the UE may continue to perform process 100 by receiving network signaling from an access node, the network signaling configuring the UE to determine a default beam for multiple PDSCHs each associated with a different cell scheduled by a single downlink control information (DCI). In some implementations, the network signaling configures the UE to determine a default beam for multiple PDSCHs each associated with a different cell scheduled by a single downlink control information (DCI) by configuring an enableDefaultBeamForMCS radio power control (RRC) parameter.

[0112] First Implementation for TCI Indication Enhancement

[0113] One aspect of the present disclosure relates to TCI indication enhancement. If the UE is capable of supporting up to N cell scheduling through a single DCI, and if the UE is capable of supporting (and if configured) indication of TCI status for multiple cells via a single DCI field (joint field in DCI), the UE can be activated by a MAC CE having multiple tables corresponding to a combination of multiple cells that can be configured by the UE, and depending on the cell actually scheduled by the single DCI, the corresponding table is used to indicate the TCI status for the corresponding cell.

[0114] An illustration of this specific implementation is shown below.

[0115] ■UE can be scheduled with a single DCI, up to 3 cells in total, such as cell 0, cell 1 and cell 2

[0116] ■ For cell 0, the UE is configured with 128 TCI states, and similarly, another two sets of 128 TCI states are configured for cell 1 and cell 2 respectively

[0117] ■UE receives a MAC CE command to activate multiple sets of TCI states / multiple TCI state tables (in addition to the TCI table for a single cell), such as:

[0118] ○ TCI table 1 for cell 0 and cell 1, where each index contains at least 2 TCI states corresponding to cell 0 and cell 1

[0119] ○ TCI table 2 for cell 0 and cell 2, where each index contains at least 2 TCI states corresponding to cell 0 and cell 2

[0120] ○ TCI table 3 for cell 1 and cell 2, where each index contains at least 2 TCI states corresponding to cell 1 and cell 2

[0121] o TCI table 4 for cell 0, cell 1 and cell 2, where each index contains at least 3 TCI states corresponding to cell 0, cell 1 and cell 2

[0122] For the above example, a sequential mapping of TCI states within the index can be assumed.

[0123] The UE may then receive a single DCI scheduling multiple cells and based on the scheduled cells, the UE uses one of the activated TCI tables:

[0124] ○ If cell 0 and cell 1 are scheduled, use TCI table 1

[0125] ○ If cell 0 and cell 2 are scheduled, use TCI table 2

[0126] ○ If cell 1 and cell 2 are scheduled, use TCI table 3

[0127] ○ If all cells are scheduled, use TCI table 4

[0128] In a specific implementation of the solution, the number of activated states of each table in the table may depend on the number of associated cells. This may be a fixed or semi-static configuration. For example, for two cells, 8 states may be activated, and for three cells, 16 states may be activated. Accordingly, the number of DCI bits indicating TCI may also be adjusted.

[0129] Figure 2 FIG. 2 is a flow chart of an example of a process 200 for TCI configuration and indication. The process 200 will be described as being performed by a UE such as Figure 4 UE 405 executes.

[0130] The UE may begin performing process 200 by receiving a set of TCI states corresponding to each of a plurality of cells (210). In some implementations, the performance of the receiving operation at stage 210 may include the UE receiving an RRC configuration from the network that configures the UE to include a set of TCI states corresponding to each of the plurality of cells.

[0131] The UE may continue process 200 by receiving a MAC CE from the network activating a set of multiple TCI-to-cell mapping tables, each of which has one or more entries associating a TCI table identifier with multiple cells that can be scheduled by a single DCI, wherein the TCI table identifier identifies a TCI state table that specifies TCI states for the associated multiple cells (220). In some implementations, each TCI-to-cell mapping table corresponds to a combination of cells that can be configured by the UE.

[0132] The UE may continue process 200 by receiving a single DCI that schedules multiple cells and indicates TCI for multiple scheduled PDSCHs associated with the multiple cells (230).

[0133] The UE may continue process 200 by determining a TCI-to-cell mapping table from an activated set of multiple TCI-to-cell mapping tables based on multiple cells scheduled by a single DCI schedule (240).

[0134] The UE may continue to perform process 200 (250) by using the indicated TCI states from the determined TCI to cell mapping table based on the TCI indication in the scheduling DCI. In some specific implementations, using the indicated TCI states from the determined TCI to cell mapping table may include, for example, using these TCI states to indicate a transmission configuration for the UE. For example, the TCI state may define one or more QCL relationships between resources in a resource set and a PDSCH DMRS port.

[0135] In some implementations, a first set of multiple TCI-to-cell mapping tables may be activated by a MAC CE. In such implementations, the first set of activated TCI-to-cell mapping tables may include (i) a first TCI-to-cell mapping table, wherein the first TCI-to-cell mapping table associates a first TCI table identifier with a first cell and a second cell, wherein each index of a TCI state table identified by the first TCI table identifier includes at least two TCI states corresponding to the first cell and the second cell, (ii) a second TCI-to-cell mapping table, wherein the second TCI-to-cell mapping table associates a second TCI table identifier with a first cell and a third cell, wherein each index of a TCI state table identified by the second TCI table identifier includes at least two TCI states corresponding to the first cell and the third cell. TCI states, (iii) a third TCI-to-cell mapping table, wherein the third TCI-to-cell mapping table associates a third TCI table identifier with the second cell and the third cell, wherein each index of the TCI state table identified by the third TCI table identifier includes at least two TCI states corresponding to the second cell and the third cell, and (iv) a fourth TCI-to-cell mapping table, wherein the fourth TCI-to-cell mapping table associates a fourth TCI table identifier with the first cell, the second cell, and the third cell, wherein each index of the TCI state table identified by the fourth TCI table identifier includes at least two TCI states corresponding to the first cell, the second cell, and the third cell.

[0136] In some implementations using the first set of activated TCI-to-cell mapping tables identified above, the received single DCI may schedule the first cell and the second cell. In such implementations, the UE's performance of the determining stage 240 may include, based on the UE's determination that the first cell and the second cell are scheduled by the single DCI, determining by the UE that the first TCI-to-cell mapping table is to be used to indicate the TCI state for the first cell and the second cell.

[0137] In some implementations using the first set of activated TCI-to-cell mapping tables identified above, the received single DCI may schedule the first cell and the third cell. In such implementations, the UE's performance of the determining stage 240 may include, based on the UE's determination that the first cell and the third cell are scheduled by the single DCI, determining by the UE that the second TCI-to-cell mapping table is to be used to indicate the TCI state for the first cell and the third cell.

[0138] In some implementations using the first set of activated TCI-to-cell mapping tables identified above, the received single DCI may schedule the second cell and the third cell. In such implementations, the UE's performance of the determining stage 240 may include, based on the UE's determination that the second cell and the third cell are scheduled by the single DCI, determining, by the UE, that a third TCI-to-cell mapping table is to be used to indicate the TCI state for the second cell and the third cell.

[0139] In some implementations using the first set of activation-threshold TCI-to-cell mapping tables identified above, the received single DCI may schedule the first cell, the second cell, and the third cell. In such implementations, the UE's performance of the determination stage 240 may be based on the UE's determination that the first cell, the second cell, and the third cell are scheduled by the single DCI, and the UE determines that the fourth TCI-to-cell mapping table will be used to indicate the TCI state for the first cell, the second cell, and the third cell.

[0140] In some implementations, a second set of multiple TCI-to-cell mapping tables may be activated by the MAC CE. In such implementations, the second set of activated TCI-to-cell mapping tables may include (i) a first TCI-to-cell mapping table, wherein the first TCI-to-cell mapping table associates a first TCI table identifier with a first set of cells, wherein each index of a TCI state table identified by the first TCI table identifier includes at least one TCI state corresponding to each cell in the first set of cells, (ii) a second TCI-to-cell mapping table, wherein the second TCI-to-cell mapping table associates a second TCI table identifier with a second set of cells, wherein each index of a TCI state table identified by the second TCI table identifier includes at least one TCI state corresponding to each cell in the second set of cells, and (iii) a third TCI-to-cell mapping table, wherein the third TCI-to-cell mapping table associates a third TCI table identifier with a third set of cells, wherein each index of a TCI state table identified by the third TCI table identifier includes at least one TCI state corresponding to each cell in the third set of cells.

[0141] In some implementations using the second set of activated TCI-to-cell mapping tables identified above, the received single DCI may schedule the first set of cells. In such implementations, the UE's performance of the determining stage 240 may include, based on the UE's determination that the first set of cells are scheduled by the single DCI, determining by the UE that the first TCI-to-cell mapping table is to be used to indicate the TCI state for the first set of cells.

[0142] In some implementations using the second set of activated TCI-to-cell mapping tables identified above, the received single DCI may schedule the second set of cells. In such implementations, the UE's performance of the determining stage 240 may include, based on the UE's determination that the second set of cells are scheduled by the single DCI, determining by the UE that the second TCI-to-cell mapping table is to be used to indicate the TCI state for the second set of cells.

[0143] In some implementations using the second set of activated TCI-to-cell mapping tables identified above, the received single DCI may schedule the third set of cells. In such implementations, the UE's performance of the determining stage 240 may include, based on the UE's determination that the third set of cells is scheduled by the single DCI, determining by the UE that the third TCI-to-cell mapping table is to be used to indicate the TCI state for the third set of cells.

[0144] Second Implementation for TCI Indication Enhancement

[0145] Another aspect of the present disclosure relates to another TCI indication enhancement. If the UE is capable of supporting up to N cell scheduling through a single DCI, and if the UE is capable of supporting (and if configured) indication of TCI states for multiple cells via a single DCI field (joint field in the DCI), the UE can be activated through a MAC CE with one table, where a single index of the TCI table can indicate up to N TCI states corresponding to N cells.

[0146] An illustration of this specific implementation is shown below:

[0147] The UE may be scheduled with a single DCI for up to 3 cells in total, such as cell 0, cell 1, and cell 2. For cell 0, the UE is configured with 128 TCI states, and similarly, another two sets of 128 TCI states are configured for cell 1 and cell 2, respectively. The UE receives a MAC CE command to activate a TCI state table, where the index may contain one or more of the following TCI states:

[0148] ■TCI table index may indicate TCI status for cell 0 only

[0149] ■TCI table index can indicate TCI status for cell 0 and cell 1

[0150] ■TCI table index can indicate TCI status for cell 0 and cell 2

[0151] ■TCI table index can indicate TCI status for cell 1 and cell 2

[0152] ■TCI table index can indicate TCI status for cell 0, cell 1 and cell 2

[0153] In some embodiments, the mapping of the TCI states in the indicated index can be implicit or explicit. For implicit indication, it is expected that another DCI field is used to indicate to the UE which cells are scheduled, and then the indicated TCI states can be mapped sequentially. For explicit indication, it is expected to indicate the UE with only TCI indication, where an enhanced table can be used in which each index also specifically indicates the cell index and the corresponding TCI state. For example, TCI index 0 can indicate scheduled cells, such as cell 0 and cell 1, in one column, and indicate a first TCI state corresponding to cell 0 and another TCI state corresponding to cell 1 in another column. This can also be considered as a method of indicating scheduled cells, in which case no additional DCI field is required to indicate the scheduled cells.

[0154] In one specific implementation, the size of the TCI table (ie, the activated TCI index) may depend on the maximum number of cells for which the TCI status needs to be indicated. This may be a fixed or semi-static configuration.

[0155] In some implementations, a single table is defined and each entry includes the TCI state for all cells that can be scheduled. If only a subset of cells are scheduled, only the corresponding TCI state is used.

[0156] Figure 3 FIG. 1 is a flowchart of another example of a process 300 for TCI configuration and indication. The process 300 will be described as being performed by a UE such as Figure 4 UE 405 executes.

[0157] The UE may begin performing process 300 by receiving a TCI-to-cell mapping table including a plurality of entries, wherein each entry in the plurality of entries associates a TCI table index with a set of one or more cells that may be scheduled by a single DCI (310). In some implementations, the performance of the receiving operation at stage 310 may include the UE receiving an RRC configuration from a network, the RRC configuration configuring the UE to include a table including a plurality of entries, wherein each entry in the plurality of entries associates a TCI table index with a TCI state for a set of one or more cells that may be scheduled by a single DCI.

[0158] The UE may continue process 300 by receiving a MAC CE activating a subset of TCI table indices of the configured TCI-to-cell mapping table (320).

[0159] The UE may continue process 300 by receiving a single DCI that schedules multiple cells and indicates TCI for multiple scheduled PDSCHs associated with the multiple cells (330).

[0160] The UE may continue process 300 by determining a TCI table index among the activated TCI table indices based on the received single DCI (340).

[0161] The UE may continue process 300 (350) by using the indicated TCI and applying the TCI state associated with the determined TCI table index for the scheduled cell. In some implementations, using the indicated TCI state associated with the determined TCI table index for the scheduled cell may include, for example, using these TCI states to indicate a transmission configuration for the UE. For example, the TCI state may define one or more QCL relationships between resources in a resource set and a PDSCH DMRS port.

[0162] In some specific implementations of process 300, a subset of TCI table indexes activated by a MAC CE may include (i) a first TCI table index, wherein the first TCI table index indicates a TCI state for a first group of one or more cells, (ii) a second TCI table index, wherein the second TCI table index indicates a TCI state for a second group of one or more cells, (iii) a third TCI table index, wherein the third TCI table index indicates a TCI state for a third group of one or more cells, and (iv) a fourth TCI table index, wherein the fourth TCI table index indicates a TCI state for a fourth group of one or more cells.

[0163] In some specific implementations, a first group of one or more cells associated with a first TCI table index may include multiple cells, a second group of one or more cells associated with a second TCI table index may include multiple cells, a third group of one or more cells associated with a third TCI table index may include multiple cells, or a fourth group of one or more cells associated with a fourth TCI table may include multiple cells.

[0164] In some specific implementations, a first group of one or more cells associated with a first TCI table index may include multiple cells, a second group of one or more cells associated with a second TCI table index may include multiple cells, a third group of one or more cells associated with a third TCI table index may include multiple cells, and a fourth group of one or more cells associated with a fourth TCI table index may include multiple cells.

[0165] In some implementations of process 300 using a subset of TCI table indexes activated by a MAC CE activated in process 300, the UE may receive a single DCI that schedules a first set of one or more cells. In such implementations, performance of the determination stage at 340 may include the UE determining to use the first TCI table index for the first set of one or more cells being scheduled.

[0166] In some implementations of process 300 using a subset of TCI table indexes activated by a MAC CE activated in process 300, the UE may receive a single DCI scheduling a second plurality of cells. In such implementations, performance of the determination stage at 340 may include the UE determining to use a second TCI table index for the scheduled second plurality of cells.

[0167] In some implementations of process 300 using a subset of TCI table indexes activated by a MAC CE activated in process 300, the UE may receive a single DCI scheduling a third plurality of cells. In such implementations, performance of the determination stage at 340 may include the UE determining to use a third TCI table index for the third plurality of cells being scheduled.

[0168] In some implementations of process 300 using a subset of TCI table indexes activated by a MAC CE activated in process 300, the UE may receive a single DCI scheduling a fourth plurality of cells. In such implementations, performance of the determination stage at 340 may include the UE determining to use a fourth TCI table index for the scheduled fourth plurality of cells.

[0169] Figure 3A FIG. 1 is a flow chart of another example of a process 300A for TCI configuration and indication. The process 300A will be described as being performed by a UE such as Figure 4 UE 405 executes.

[0170] Process 300A is similar to process 300. However, stage 330A differs from Figure 3 The UE in stage 330A receives a single DCI indicating TCIs for multiple scheduled PDSCHs associated with multiple cells, but in the example of process 300A, the received DCI in stage 330A does not indicate multiple cells scheduled for PDSCH by the single DCI. Instead, in certain implementations of process 300A below, the UE may determine multiple cells scheduled for PDSCH by the single DCI based on the TCI indicated in the single DCI using the activated set of TCI table indices, as described in more detail below.

[0171] The UE may begin performing process 300A by receiving a TCI-to-cell mapping table including a plurality of entries, wherein each entry in the plurality of entries associates a TCI table index with a set of one or more cells that may be scheduled by a single DCI (310). In some implementations, the performance of the receiving operation at stage 310 may include the UE receiving an RRC configuration from a network, the RRC configuration configuring the UE to include a table including a plurality of entries, wherein each entry in the plurality of entries associates a TCI table index with a TCI state for a set of one or more cells that may be scheduled by a single DCI.

[0172] The UE may continue process 300A by receiving a MAC CE activating a subset of TCI table indices of the configured TCI-to-cell mapping table (320).

[0173] The UE may continue process 300A by receiving a single DCI indicating TCI for multiple scheduled PDSCHs associated with multiple cells (330).

[0174] The UE may continue process 300A by determining a TCI table index among the activated TCI table indices (340).

[0175] The UE may continue to perform process 300A (350) by using the indicated TCI and applying the TCI state associated with the determined TCI table index to the scheduled cell. In some specific implementations, applying the indicated TCI state associated with the determined TCI table index may include, for example, using these TCI states to indicate the transmission configuration of the UE. For example, the TCI state may define one or more QCL relationships between resources in a resource set and a PDSCH DMRS port.

[0176] In some specific implementations of process 300A, a subset of TCI table indexes activated by the MAC CE may include (i) a first TCI table index, wherein the first TCI table index includes a first column indicating a first group of cells including at least the first cell and a second column indicating a TCI state for the first cell, (ii) a second TCI table index, wherein the second TCI table index includes a first column indicating a second group of cells including at least the first cell and a third cell, a second column indicating a TCI state for the first cell, and a third column indicating a TCI state for the second cell, (iii) a third TCI table index, wherein the third TCI table index includes a first column indicating a third group of cells including the first cell and the third cell, a second column indicating a TCI state for the first cell, and a third column indicating a TCI state for the second cell. (iv) a fourth TCI table index, wherein the fourth TCI table index includes a first column indicating a fourth group of cells including the second cell and the third cell, a second column indicating the TCI state for the second cell, and a third column indicating the TCI state for the third cell; (v) a fifth TCI table index, wherein the fifth TCI table index includes a first column indicating a fifth group of cells including the first cell, the second cell, and the third cell, a second column indicating the TCI state for the first cell, a third column indicating the TCI state for the second cell, and a third column indicating the TCI state for the third cell.

[0177] In some specific implementations, a first group of one or more cells associated with a first TCI table index may include multiple cells, a second group of one or more cells associated with a second TCI table index may include multiple cells, a third group of one or more cells associated with a third TCI table index may include multiple cells, a fourth group of one or more cells associated with a fourth TCI table index may include multiple cells, or a fifth group of one or more cells associated with a fifth TCI table index may include multiple cells.

[0178] In some specific implementations, a first group of one or more cells associated with a first TCI table index may include multiple cells, a second group of one or more cells associated with a second TCI table index may include multiple cells, a third group of one or more cells associated with a third TCI table index may include multiple cells, a fourth group of one or more cells associated with a fourth TCI table index may include multiple cells, and a fifth group of one or more cells associated with a fifth TCI table index may include multiple cells.

[0179] In some implementations, the received single DCI indicating TCI for multiple scheduled PDSCHs associated with multiple cells includes an indication of a TCI table index.

[0180] In some implementations of process 300A using a subset of TCI table indexes activated by a MAC CE in process 300A, the received DCI indicating the TCI corresponds to a first TCI table index. In such implementations, the execution of determining stage 340A may include the UE determining, based on a first column of the first TCI table index, that the cells to be scheduled by the received single DCI include a first group of one or more cells. Thus, even if there is no explicit indication in the DCI that multiple cells are scheduled for PDSCH by a single DCI, the UE may use a subset of TCI table indexes activated by a MAC CE in process 300A to determine multiple cells scheduled for PDSCH by a single DCI.

[0181] In some implementations of process 300A using a subset of TCI table indexes activated by a MAC CE in process 300A, the received DCI indicating the TCI corresponds to a second TCI table index. In such implementations, the execution of determining stage 340A may include the UE determining, based on a first column of the second TCI table index, that the cells to be scheduled by the received single DCI include a second set of one or more cells. Thus, even if there is no explicit indication in the DCI that a plurality of cells are scheduled for PDSCH by a single DCI, the UE may determine in process 300A a plurality of cells scheduled for PDSCH by a single DCI using a subset of TCI table indexes activated by a MAC CE.

[0182] In some implementations of process 300A using a subset of TCI table indexes activated by a MAC CE in process 300A, the received DCI indicating the TCI corresponds to a first TCI table index. In such implementations, the execution of the determination phase 340A may include the UE determining to use the first TCI table index. In such implementations, the execution of the use phase at 350A may include the UE using the indicated TCI and the TCI state in the second column of the first TCI table index is applied to the scheduled cell.

[0183] In some implementations of process 300A using a subset of TCI table indexes activated by a MAC CE in process 300A, the received DCI indicating the TCI corresponds to a second TCI table index. In such implementations, the performance of the determination phase 340A may include the UE determining to use the second TCI table index. In such implementations, the UE's performance of the use phase 350A may include using the indicated TCI and applying the TCI state in the second column of the second TCI table index and the third column of the second TCI table index to the scheduled cell.

[0184] In some implementations of process 300A using a subset of TCI table indexes activated by a MAC CE in process 300A, the received DCI indicating TCI corresponds to a third TCI table index. In such implementations, the performance of determining phase 340A may include the UE determining to use the third TCI table index. In such implementations, the UE's performance of using phase 350A may include the UE using the indicated TCI and applying the TCI state in the second column of the third TCI table index and the third column of the third TCI table index to the scheduled cell.

[0185] In some implementations of process 300A using a subset of TCI table indexes activated by a MAC CE in process 300A, the received DCI indicating the TCI corresponds to a fifth TCI table index. In such implementations, the performance of determining stage 340A may include the UE determining to use the fifth TCI table index. In such implementations, the performance of using stage 350A may include the UE using the indicated TCI and applying the TCI states in the second column of the third TCI table index, the third column of the fifth TCI table index, and the fourth column of the fifth TCI table index to the scheduled cell.

[0186] Other specific implementations

[0187] In some embodiments, more than one TCI field may be indicated in a DCI that schedules multiple cells, where the size of each field may depend on one or more of the following. In such implementations, the number of TCI fields may depend on the number of cells scheduled. For example, for 2 cells, 1 field may be used with up to 8 indices, while for 4 cells, 2 fields may be used with up to 4 indices each. In some implementations, the number of cells whose TCI status is indicated by one field.

[0188] In some embodiments, a single TCI field is indicated in the DCI that schedules multiple cells, where the TCI field can be used to indicate an index from a single table, but the index is separated for different cells. For example, if 2 cells are scheduled, 8 indexes are activated, where the first 4 indexes are associated with cell 0 and the last 4 indexes are associated with cell 1. In practice, it is similar to mapping a specific bit field value for TCI to a specific cell.

[0189] Figure 4 4 is a diagram of an example of a wireless communication system 400 according to some specific implementations. Note that Figure 4 The system is just one example of a possible system, and features of the present disclosure may be implemented in other wireless communication systems.

[0190] The following description is provided for an example communication system 400 operating in conjunction with a fifth generation (5G) network provided by the 3rd Generation Partnership Project (3GPP) Technical Specification (TS). However, the example implementation is not limited in this regard, and the described implementation may be applied to other networks that may benefit from the principles described herein, such as 3GPP Long Term Evolution (LTE) networks, Wi-Fi or Worldwide Microwave Access Interoperability (WiMax) networks, etc. In addition, other types of communication standards are also possible, including future 3GPP systems (e.g., sixth generation (6G)) systems, IEEE 802.16 protocols (e.g., WMAN, WiMAX, etc.), etc. Although various aspects may be described herein using terms typically associated with 5G NR, various aspects of the present disclosure may be applied to other systems, such as 3G, 4G, and / or systems after 5G (e.g., 6G).

[0191] As shown, the communication system 400 includes a plurality of user devices. As used herein, "user device" may generally refer to a device associated with a mobile participant or a traffic participant in the communication system 400, for example, a mobile (capable of moving) communication device such as a vehicle and a pedestrian user equipment (PUE) device. More specifically, the V2X communication system 400 includes two UEs 405 (UE 405-1 and UE 405-2 are collectively referred to as "UE 405" or "multiple UEs 405"), two base stations 410 (base station 410-1 and base station 410-2 are collectively referred to as "base station 410" or "multiple base stations 410"), two cells 415 (cell 415-1 and cell 415-2 are collectively referred to as "cell 415" or "multiple cells 415"), and one or more servers 435 in a core network (CN) 440 connected to the Internet 445.

[0192] As shown, some user equipments may be able to communicate directly with each other, i.e., without intermediate infrastructure equipment (such as base station 410-1). As shown, UE 405-1 may communicate directly with UE 405-2 (e.g., V2X-related communications). Similarly, UE 405-2 may communicate directly with UE 405-2. This peer-to-peer communication may utilize a "side link" interface such as a PC5 interface. In some specific implementations, the PC5 interface supports direct cellular communication between user equipments (e.g., between UE 405), while the Uu interface supports cellular communication with infrastructure equipment (such as a base station). For example, UE 405 may use the PC5 interface for radio resource control (RRC) signaling exchange between UEs. The PC5 / Uu interface is used only as an example, and PC5 as used herein may represent various other possible wireless communication technologies that allow direct side link communication between user equipments, while Uu may represent cellular communication between user equipments and infrastructure equipment (such as a base station).

[0193] The PC5 interface may alternatively be referred to as the SL interface and may include one or more logical channels, including but not limited to a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH), a physical sidelink discovery channel (PSDCH), and a physical sidelink broadcast channel (PSBCH). In some examples, the SL interface may operate on an unlicensed spectrum (e.g., in the unlicensed 5 gigahertz (GHz) and 6 GHz bands) or a (licensed) shared spectrum.

[0194] In some implementations, UE 405 may be a physical hardware device capable of running one or more applications, capable of accessing network services with corresponding base stations 410 via one or more radio links 420, and capable of communicating with each other via side links 425. Links 420 may allow UE 405 to send and receive data from base stations 410 providing links 420. Side links 425 may allow UE 405 to send and receive data with each other. Side links 425 between UEs 405 may include a method for transmitting data from UE 405-1 to UE 405-2 (or vice versa) and / or between UE 405 and UE type RSU ( Figure 4 One or more channels for transmitting information between the two devices (not shown) (and vice versa).

[0195] In some implementations, the channel may include a physical sidelink broadcast channel (PSBCH), a physical sidelink control channel (PSCCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), a physical sidelink feedback channel (PSFCH), and / or any other similar communication channel. The PSFCH carries feedback related to successful or failed reception of sidelink transmissions. The PSSCH may be scheduled by sidelink control information (SCI) carried in the sidelink PSCCH. The SCI in NR V2X is sent in two phases. The Phase 1 SCI in NR V2X is carried on the PSCCH, while the Phase 2 SCI is carried on the corresponding PSSCH. For example, the 2-phase SCI may be used in the following situations: by applying the 1st SCI for sensing and broadcast communication purposes, and applying the 2nd SCI carrying the remaining information to data scheduling for unicast / multicast data transmission.

[0196] In some implementations, the side link 425 is established through an initial beam pairing process. In the process, the UE 405 identifies (e.g., using a beam selection process) one or more potential beam pairs that can be used for the side link 425. The beam pair includes a transmitter beam from a transmitter UE (e.g., UE 405-1) to a receiver UE (e.g., UE 405-2) and a receiver beam from the receiver UE to the transmitter UE. In some examples, the UE 405 ranks the one or more potential beam pairs. Then, the UE 405 may select one of the one or more potential beam pairs for the side link 425 based on the ranking.

[0197] As stated, between two or more UEs 405 or between a UE 405 and a UE type RSU ( Figure 4 The air interface between the base stations 410 and UE 405 (not shown) may be referred to as a PC5 interface. In order to send data to / receive data from one or more eNBs 410 or UE 405, UE 405 may include a transmitter / receiver (or alternatively, a transceiver), a memory, one or more processors, and / or other similar components that enable UE 405 to operate according to one or more wireless communication protocols and / or one or more cellular communication protocols. UE 405 may have multiple antenna elements that enable UE 405 to maintain multiple links 420 and / or side links 425 to send data to / receive data from multiple base stations and / or multiple UEs 405. For example, as Figure 4 As shown, UE 405 may be connected to base station 410 - 1 via link 420 and simultaneously connected to UE 405 - 2 via side link 425 .

[0198] In some implementations, UE 405 is configured to use a resource pool for sidelink communications. The sidelink resource pool may be divided into multiple time slots, frequency channels, and frequency subchannels. In some examples, UE 405 is synchronized and performs sidelink transmissions aligned with time slot boundaries. It may be desirable for the UE to select several time slots and subchannels for transmission of a transport block. In some aspects, the UE may use different subchannels to transmit a transport block across multiple time slots within its own resource selection window, which may be determined using packet delay budget information.

[0199] In some implementations, the communication system 400 supports different broadcast types, including unicast, broadcast, and groupcast (or multicast) communications. Unicast refers to direct communication between two UEs. Broadcast refers to communication broadcasted by a single UE to multiple other UEs. Groupcast refers to communication transmitted from a single UE to a set of UEs that meet a certain condition (e.g., as members of a specific group).

[0200] In some specific implementations, UE 405 is configured to perform a side link beam failure recovery process. The V2X communication system 400 may enable or disable support for the side link beam failure recovery process in UE 405. More specifically, the V2X communication system 400 may enable or disable support for each resource pool or each PC5-RRC configuration (which may depend on UE capabilities). In the side link beam failure recovery process, one UE in UE 405 is designated as a transmitter UE (e.g., UE 405-1), and the other UE is designated as a receiver UE (e.g., UE 405-2). For the purposes of this disclosure, the UE that detects the beam failure is designated as a receiver UE, and the other UE is designated as a transmitter UE. More generally, a transmitter UE is a UE that transmits side link data, and a receiver UE is a UE that receives side link data. In addition, although the present disclosure describes a single transmitter UE and a single receiver UE, the present disclosure is not limited to this arrangement and may include more than one transmitter UE and / or receiver UE.

[0201] Figure 5 5 is a block diagram of an example of a user equipment (UE). UE 500 may be similar to Figure 4 UE 405 and is essentially interchangeable therewith.

[0202] UE 500 can be any mobile or non-mobile computing device, such as, for example, a mobile phone, a computer, a tablet, an industrial wireless sensor (e.g., microphone, carbon dioxide sensor, pressure sensor, humidity sensor, thermometer, motion sensor, accelerometer, laser scanner, fluid level sensor, inventory sensor, voltage / current meter, actuator, etc.), video monitoring / surveillance equipment (e.g., camera, camcorder, etc.), a wearable device (e.g., a smart watch), a loose IoT device.

[0203] UE 500 may include a processor 502, RF interface circuitry 504, memory / storage 506, a user interface 508, a sensor 510, a driver circuit 512, a power management integrated circuit (PMIC) 514, antenna structures 516, and a battery 518. The components of UE 500 may be implemented as an integrated circuit (IC), a portion of an integrated circuit, a discrete electronic device or other module, logical component, hardware, software, firmware, or a combination thereof. Figure 5 The block diagram of UE 500 is intended to show a high-level view of some of the components of UE 500. However, some of the components shown may be omitted, additional components may be present, and different arrangements of the components shown may occur in other implementations.

[0204] Components of UE 500 may be coupled to various other components via one or more interconnects 520, which may represent any type of interface, input / output, bus (local, system, or extension), transmission line, trace, optical connection, etc., which allows various circuit components (on a common or different chip or chipset) to interact with each other.

[0205] The processor 502 may include processor circuits such as, for example, a baseband processor circuit (BB) 522A, a central processor unit circuit (CPU) 522B, and a graphics processor unit circuit (GPU) 522C. The processor 502 may include any type of circuit or processor circuit that executes or otherwise operates computer-executable instructions (such as program codes, software modules, or functional processes from the memory / storage device 506) to cause the UE 500 to perform operations as described herein.

[0206] In some implementations, the baseband processor circuit 522A may access a communication protocol stack 524 in the memory / storage device 506 to communicate over a 3GPP compatible network. In general, the baseband processor circuit 522A may access the communication protocol stack to: perform user plane functions at the PHY layer, MAC layer, RLC layer, PDCP layer, SDAP layer, and PDU layer; and perform control plane functions at the PHY layer, MAC layer, RLC layer, PDCP layer, RRC layer, and non-access layer. In some implementations, the PHY layer operations may be additionally / alternatively performed by components of the RF interface circuit 504. The baseband processor circuit 522A may generate or process a baseband signal or waveform that carries information in a 3GPP compatible network. In some implementations, the waveform for NR may be based on cyclic prefix OFDM "CP-OFDM" in the uplink or downlink, and discrete Fourier transform spread OFDM "DFT-S-OFDM" in the uplink.

[0207] The memory / storage 506 may include one or more non-transitory computer-readable media including instructions (e.g., the communication protocol stack 524) that may be executed by one or more of the processors 502 to cause the UE 500 to perform various operations described herein. The memory / storage 506 includes any type of volatile or non-volatile memory that may be distributed throughout the UE 500. In some implementations, some of the memory / storage 506 may be located on the processor 502 itself (e.g., L1 cache and L2 cache), while other memory / storage 506 are located external to the processor 502 but may be accessed via a memory interface. The memory / storage 506 may include any suitable volatile or non-volatile memory, such as, but not limited to, dynamic random access memory (DRAM), static random access memory (SRAM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), flash memory, solid-state memory, or any other type of memory device technology.

[0208] The RF interface circuit 504 may include a transceiver circuit and a radio frequency front end module (RFEM), which allows the UE 500 to communicate with other devices through a radio access network. The RF interface circuit 504 may include various components arranged in a transmit path or a receive path. These components may include, for example, switches, mixers, amplifiers, filters, synthesizer circuits, control circuits, etc.

[0209] In the receive path, the RFEM may receive the radiated signal from the air interface via the antenna structure 516 and then filter and amplify the signal (using a low noise amplifier). The signal may be provided to the transceiver's receiver, which down-converts the RF signal to a baseband signal, which is provided to the baseband processor of the processor 502.

[0210] In the transmit path, the transmitter of the transceiver up-converts the baseband signal received from the baseband processor and provides an RF signal to the RFEM. The RFEM may amplify the signal through a power amplifier before the RF signal is radiated across the air interface via the antenna 516.

[0211] In various implementations, the RF interface circuit 504 may be configured to transmit / receive signals in a manner compatible with NR access technology.

[0212] Antenna 516 may include antenna elements to convert electrical signals into radio waves to travel through the air and convert received radio waves into electrical signals. These antenna elements may be arranged into one or more antenna panels. Antenna 516 may have an antenna panel that is omnidirectional, directional, or a combination thereof to achieve beamforming and multiple-input / multiple-output communications. Antenna 516 may include a microstrip antenna, a printed antenna manufactured on the surface of one or more printed circuit boards, a patch antenna, a phased array antenna, etc. Antenna 516 may have one or more panels that are designed for a specific frequency band including a band in FR1 or FR2.

[0213] The user interface 508 includes various input / output (I / O) devices designed to enable a user to interact with the UE 500. The user interface 508 includes input device circuits and output device circuits. The input device circuit includes any physical or virtual components for accepting input, and in particular includes one or more physical or virtual buttons (e.g., a reset button), a physical keyboard, a keypad, a mouse, a touch pad, a touch screen, a microphone, a scanner, or a headset, etc. The output device circuit includes any physical or virtual components for displaying information or otherwise delivering information (such as sensor readings, actuator positions, or other similar information). The output device circuit may include any number or combination of audio or visual displays, in particular including one or more simple visual outputs / indicators (e.g., binary state indicators, such as light emitting diodes "LEDs" and multi-character visual outputs), or more complex outputs, such as display devices or touch screens (e.g., liquid crystal displays "LCDs", LED displays, quantum dot displays, projectors, etc.), where the output of characters, graphics, multimedia objects, etc. is generated or produced by the operation of the UE 500.

[0214] Sensor 510 may include a device, module, or subsystem whose purpose is to detect events or changes in its environment and to send information about the detected events (sensor data) to some other device, module, subsystem, etc. Examples of such sensors include, among others: an inertial measurement unit including an accelerometer, gyroscope, or magnetometer; a microelectromechanical system or nanoelectromechanical system including a three-axis accelerometer, three-axis gyroscope, or magnetometer; a liquid level sensor; a flow sensor; a temperature sensor (e.g., a thermistor); a pressure sensor; a barometric pressure sensor; a gravity meter; an altimeter; an image capture device (e.g., a camera or a lensless aperture); a light detection and ranging sensor; a proximity sensor (e.g., an infrared radiation detector, etc.); a depth sensor; an ambient light sensor; an ultrasonic transceiver; a microphone or other similar audio capture device; and the like.

[0215] The driver circuit 512 may include software and hardware elements that operate to control a specific device embedded in, attached to, or otherwise communicatively coupled to the UE 500. The driver circuit 512 may include separate drivers to allow other components to interact with or control various input / output (I / O) devices that may be present in or connected to the UE 500. For example, the driver circuit 512 may include: a display driver for controlling and allowing access to a display device, a touch screen driver for controlling and allowing access to a touch screen interface, a sensor driver for obtaining sensor readings of the sensor circuit 528 and controlling and allowing access to the sensor circuit 528, a driver for obtaining an actuator position of an electromechanical component or controlling and allowing access to an electromechanical component, a camera driver for controlling and allowing access to an embedded image capture device, and an audio driver for controlling and allowing access to one or more audio devices.

[0216] The PMIC 514 may manage the power provided to various components of the UE 500. Specifically, with respect to the processor 502, the PMIC 514 may control power source selection, voltage scaling, battery charging, or DC-DC conversion.

[0217] In some implementations, the PMIC 514 may control or otherwise be part of various power saving mechanisms of the UE 500, including DRX, as discussed herein. The battery 518 may power the UE 500, but in some examples, the UE 500 may be installed and deployed in a fixed location and may have a power source coupled to the power grid. The battery 518 may be a lithium-ion battery, a metal-air battery such as a zinc-air battery, an aluminum-air battery, a lithium-air battery, etc. In some implementations, such as in vehicle-based applications, the battery 518 may be a typical lead-acid automotive battery.

[0218] Figure 6 is a block diagram of an example of an access node. Figure 6 An access node 600 (e.g., a base station or gNB) is shown according to some implementations. Access node 600 can be similar to base station 410 and can be substantially interchangeable therewith. Access node 600 can include a processor 602, RF interface circuitry 604, core network (CN) interface circuitry 606, memory / storage circuitry 608, and antenna structures 610.

[0219] The components of access node 600 may be coupled to various other components via one or more interconnects 612. Processor 602, RF interface circuitry 604, memory / storage circuitry 608 (including communication protocol stack 614), antenna structures 610, and interconnects 612 may be similar to those described with reference to Figure 6Like-named elements are shown and described.For example, processor 602 may include processor circuits such as, for example, baseband processor circuit (BB) 616A, central processor unit circuit (CPU) 616B, and graphics processor unit circuit (GPU) 616C.

[0220] The CN interface circuit 606 may provide a connection to a core network (e.g., a 5GC using a 5th generation core network (5GC) compatible network interface protocol such as a carrier Ethernet protocol or some other suitable protocol). Network connectivity may be provided to / from the access node 600 via optical fiber or wireless backhaul. The CN interface circuit 606 may include one or more dedicated processors or FPGAs for communicating using one or more of the aforementioned protocols. In some implementations, the CN interface circuit 606 may include multiple controllers for providing connectivity to other networks using the same or different protocols.

[0221] As used herein, the terms "access node", "access point", etc. may describe equipment that provides radio baseband functionality for data and / or voice connections between a network and one or more users. These access nodes may be referred to as BS, gNB, RAN node, eNB, NodeB, RSU, TRxP or TRP, etc., and may include ground stations (e.g., terrestrial access points) or satellite stations that provide coverage within a geographic area (e.g., a cell). As used herein, the terms "NG RAN node", etc. may refer to an access node 600 (e.g., a gNB) operating in an NR or 5G system, and the terms "E-UTRAN node", etc. may refer to an access node 600 (e.g., an eNB) operating in an LTE or 4G system. According to various specific implementations, the access node 600 may be implemented as one or more of a dedicated physical device such as a macrocell base station and / or a low power (LP) base station for providing a femtocell, picocell or other similar cell with a smaller coverage area, smaller user capacity or higher bandwidth than a macrocell.

[0222] In some implementations, individual serving cells may provide individual CCs. The coverage of the serving cells may be different, for example, because CCs on different frequency bands will experience different path losses. The primary serving cell or PCell may provide the PCC for both UL and DL, and may handle activities related to RRC and NAS. Other serving cells are referred to as SCells, and each SCell may provide individual SCCs for both UL and DL. SCCs may be added and removed as needed, and changing PCCs may require the UE 405 to undergo a handover. In LAA, eLAA, and feLAA, some or all of the SCells may operate in an unlicensed spectrum (referred to as "LAA SCells"), and the LAA SCells are assisted by the PCells operating in the licensed spectrum. When a UE is configured with more than one LAA SCell, the UE may receive UL grants on the configured LAA SCells, indicating different PUSCH start positions within the same subframe.

[0223] In some implementations, all or part of the access node 600 may be implemented as one or more software entities running on a server computer as part of a virtual network that may be referred to as a CRAN and / or a virtual baseband unit pool (vBBUP). In these implementations, the CRAN or vBBUP may implement a RAN functional split, such as a PDCP split, where the RRC and PDCP layers are operated by the CRAN / vBBUP and other L2 protocol entities are operated by the access node 600; a MAC / PHY split, where the RRC, PDCP, RLC, and MAC layers are operated by the CRAN / vBBUP and the PHY layer is operated by the access node 600; or a "lower PHY" split, where the RRC, PDCP, RLC, MAC layers, and upper portions of the PHY layers are operated by the CRAN / vBBUP and the lower portions of the PHY layers are operated by the access node 600.

[0224] In the V2X scenario, the access node 600 may be an RSU or act as an RSU. The term "road side unit" or "RSU" may refer to any traffic infrastructure entity used for V2X communication. The RSU may be implemented in or by a suitable RAN node or a stationed (or relatively stationed) UE, wherein an RSU implemented in or by a UE may be referred to as a "UE-type RSU", an RSU implemented in or by an eNB may be referred to as an "eNB-type RSU", an RSU implemented in or by a gNB may be referred to as a "gNB-type RSU", and so on.

[0225] For ease of description, various components may be described as performing one or more tasks. Such descriptions should be interpreted as including the phrase "configured to". Representing a component configured to perform one or more tasks expressly intends that the component does not invoke the interpretation of 35 U.S.C. §112(f).

[0226] For one or more embodiments, at least one of the components shown in one or more of the foregoing figures may be configured to perform one or more operations, techniques, processes, or methods described in the following example section. For example, the baseband circuit described above in conjunction with one or more of the foregoing figures may be configured to operate according to one or more of the examples described below. For another example, the circuits associated with the UE, base station, network element, etc. described above in conjunction with one or more of the foregoing figures may be configured to operate according to one or more of the examples described below in the example section.

[0227] Unless explicitly stated otherwise, any of the above embodiments may be combined with any other embodiment (or combination of embodiments). The foregoing description of one or more specific implementations provides illustration and description, but is not intended to be exhaustive or to limit the scope of the embodiments to the precise form disclosed. Modifications and variations are possible in view of the above teachings or may be obtained from the practice of various embodiments.

[0228] Although the above embodiments have been described in considerable detail, numerous variations and modifications will become apparent to those skilled in the art once the above disclosure is fully appreciated. It is intended that the following claims be interpreted to include all such variations and modifications.

[0229] It is understood that the use of personally identifiable information should be subject to privacy policies and practices that are generally recognized to meet or exceed industry or government requirements for maintaining user privacy. Specifically, personally identifiable information data should be managed and processed to minimize the risk of unintentional or unauthorized access or use, and the nature of the authorized use should be clearly stated to users.

Claims

1. A method for TCI configuration and indication, the method comprising: Receiving, by the UE, a set of TCI states corresponding to each cell of a plurality of cells; receiving, by the UE from a network, a MAC CE activating a set of multiple TCI-to-cell mapping tables, wherein each TCI-to-cell mapping table has one or more entries associating a TCI table identifier with multiple cells that can be scheduled by a single DCI, wherein the TCI table identifier identifies a TCI state table that specifies TCI states for the associated multiple cells; receiving, by the UE, a single DCI that schedules a plurality of cells and indicates TCI for a plurality of scheduled PDSCHs associated with the plurality of cells; determining, by the UE, a TCI-to-cell mapping table from a set of multiple activated TCI-to-cell mapping tables based on the multiple cells scheduled by the single DCI scheduling; as well as The UE uses the indicated TCI state from the determined TCI-to-cell mapping table based on the TCI indication in the scheduling DCI.

2. The method of claim 1, wherein each TCI-to-cell mapping table corresponds to a combination of cells that can be configured by the UE.

3. The method of claim 1 , wherein receiving, by the UE, a set of TCI states corresponding to each of the plurality of cells comprises: An RRC configuration is received from the network, the RRC configuration configuring the UE to include a set of TCI states corresponding to each of a plurality of cells.

4. The method of claim 1, wherein the activated set of multiple TCI-to-cell mapping tables comprises: (i) a first TCI-to-cell mapping table, wherein the first TCI-to-cell mapping table associates a first TCI table identifier with a first cell and a second cell, wherein each index of the TCI state table identified by the first TCI table identifier includes at least two TCI states corresponding to the first cell and the second cell; (ii) a second TCI-to-cell mapping table, wherein the second TCI-to-cell mapping table associates a second TCI table identifier with the first cell and the third cell, wherein each index of the TCI state table identified by the second TCI table identifier includes at least two TCI states corresponding to the first cell and the third cell; (iii) a third TCI-to-cell mapping table, wherein the third TCI-to-cell mapping table associates a third TCI table identifier with the second cell and a third cell, wherein each index of the TCI state table identified by the third TCI state table identifier includes at least two TCI states corresponding to the second cell and the third cell; and (iv) a fourth TCI-to-cell mapping table, wherein the fourth TCI-to-cell mapping table associates a fourth TCI table identifier with the first cell, the second cell and the third cell, wherein each index of the TCI state table identified by the fourth TCI state table identifier includes at least three TCI states corresponding to the first cell, the second cell and the third cell.

5. The method according to claim 4, The received single DCI schedules the first cell and the second cell, Wherein determining, by the UE based on the multiple cells scheduled by the single DCI scheduling, a TCI-to-cell mapping table from an activated set of multiple TCI-to-cell mapping tables comprises: Based on the UE's determination that the first cell and the second cell are scheduled by the single DCI, the UE determines that the first TCI-to-cell mapping table will be used to indicate TCI states for the first cell and the second cell.

6. The method according to claim 4, The received single DCI schedules the first cell and the third cell, Wherein determining, by the UE based on the multiple cells scheduled by the single DCI scheduling, a TCI-to-cell mapping table from an activated set of multiple TCI-to-cell mapping tables comprises: Based on the UE's determination that the first cell and the third cell are scheduled by the single DCI, the UE determines that the second TCI-to-cell mapping table will be used to indicate TCI states for the first cell and the third cell.

7. The method according to claim 4, The received single DCI schedules the second cell and the third cell, Wherein determining, by the UE based on the multiple cells scheduled by the single DCI scheduling, a TCI-to-cell mapping table from an activated set of multiple TCI-to-cell mapping tables comprises: Based on the UE's determination that the second cell and the third cell are scheduled by the single DCI, the UE determines that the third TCI-to-cell mapping table will be used to indicate TCI states for the second cell and the third cell.

8. The method according to claim 4, The received single DCI schedules the first cell, the second cell and the third cell, Wherein determining, by the UE based on the multiple cells scheduled by the single DCI scheduling, a TCI-to-cell mapping table from an activated set of multiple TCI-to-cell mapping tables comprises: Based on the UE's determination that the first cell, the second cell, and the third cell are scheduled by the single DCI, the UE determines that the fourth TCI-to-cell mapping table will be used to indicate the TCI status for the first cell, the second cell, and the third cell.

9. The method of claim 1, wherein the activated set of multiple TCI-to-cell mapping tables comprises: (i) a first TCI-to-cell mapping table, wherein the first TCI-to-cell mapping table associates a first TCI table identifier with a first group of cells, wherein each index of the TCI state table identified by the first TCI table identifier comprises at least one TCI state corresponding to each cell in the first group of cells; (ii) a second TCI-to-cell mapping table, wherein the second TCI-to-cell mapping table associates a second TCI table identifier with a second set of cells, wherein each index of the TCI state table identified by the second TCI table identifier comprises at least one TCI state corresponding to each cell in the second set of cells; and (iii) a third TCI-to-cell mapping table, wherein the third TCI-to-cell mapping table associates a third TCI table identifier with a third group of cells, wherein each index of the TCI state table identified by the third TCI table identifier includes at least one TCI state corresponding to each cell in the third group of cells.

10. The method according to claim 9, The received single DCI schedules the first group of cells, Wherein determining, by the UE based on the multiple cells scheduled by the single DCI scheduling, a TCI-to-cell mapping table from an activated set of multiple TCI-to-cell mapping tables comprises: Based on the UE's determination that the first group of cells is scheduled by the single DCI, the UE determines that the first TCI-to-cell mapping table will be used to indicate a TCI state for the first group of cells.

11. The method according to claim 9, The received single DCI schedules the second group of cells, Wherein determining, by the UE based on the multiple cells scheduled by the single DCI scheduling, a TCI-to-cell mapping table from an activated set of multiple TCI-to-cell mapping tables comprises: Based on the UE's determination that the second group of cells is scheduled by the single DCI, the UE determines that the second TCI-to-cell mapping table is to be used to indicate a TCI state for the second group of cells.

12. The method according to claim 9, The received single DCI schedules the third group of cells, Wherein determining, by the UE based on the multiple cells scheduled by the single DCI scheduling, a TCI-to-cell mapping table from an activated set of multiple TCI-to-cell mapping tables comprises: Based on the UE's determination that the third group of cells is scheduled by the single DCI, the UE determines that the third TCI-to-cell mapping table will be used to indicate a TCI state for the third group of cells.

13. A UE, comprising: one or more computers; and One or more memory devices storing instructions which, when executed by the one or more computers, cause the one or more computers to perform the operations of the method according to claims 1-12.

14. A computer-readable medium storing instructions which, when executed by the one or more computers, cause the one or more computers to perform the operations of claims 1-12.

Images