Beam indication method and device

Abstract

A method of wireless communication includes transmitting, by a network device, a message including a cell handover command and N transmission configuration indicator (TCI) states for one or more candidate cells or a target cell, where N is a positive integer. Another method of wireless communication includes transmitting, by a network device, a message indicating N TCI states for one or more candidate cells or a target cell, where N is a positive integer, the message not including a cell handover command.

Description

Technical Field

[0001] The present disclosure relates generally to wireless communications. Background Art

[0002] Wireless communication technology is moving the world toward an increasingly connected networked society. The rapid growth of wireless communications and technological advances have led to greater demand for capacity and connectivity as well as location information for wireless devices. Other aspects such as energy consumption, device cost, spectrum efficiency, and latency are also important to meet the needs of various communication scenarios. Compared to existing wireless networks, next-generation systems and wireless communication technologies need to support an increased number of users and devices, as well as an increasingly mobile society that includes location information. Summary of the invention

[0003] Several technical schemes are described for indicating beam status in a wireless network.

[0004] In one aspect, a wireless communication method is disclosed, which includes sending a message through a network device, the message including cell switching information and N transmission configuration indicator (TCI) states, the N TCI states being used for one or more candidate cells or a target cell, where N is a positive integer.

[0005] In another aspect, another wireless communication method is disclosed. The method includes sending a message by a network device, the message indicating N TCI states for one or more candidate cells or a target cell, where N is a positive integer, so that the message does not include cell switching information.

[0006] On the other hand, another wireless communication method is disclosed. The method includes receiving a message from a network device through a wireless device, the message including cell switching information and N TCI states, the cell switching information and the N TCI states are for one or more candidate cells or a target cell, where N is a positive integer; and operating the wireless device according to the message.

[0007] On the other hand, another wireless communication method is disclosed, which includes operating a wireless communication device to send or receive a reference signal (RS) or a channel or a signal in a network, wherein it is assumed that the RS is quasi-colocated (QCLed) with another RS.

[0008] On the other hand, another wireless communication method is disclosed. The method includes receiving a message from a network device through a wireless device, the message indicating N TCI states for one or more candidate cells or a target cell, where N is a positive integer, so that the message does not include cell switching information; and operating the wireless device according to the message.

[0009] In another aspect, a device is disclosed, which includes a processor configured to execute the above method.

[0010] In yet another aspect, a computer readable medium is disclosed. The computer readable medium stores code that, when executed by a processor, causes the processor to perform the method described herein.

[0011] This document describes these and other aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figures 1 to 12 Describes various configurations of TCI states and TCI state pools.

[0013] Figures 13 to 17 Flowcharts depicting various examples of wireless communication methods.

[0014] Fig.18 An example of a block diagram of a wireless communication system is shown.

[0015] Fig.19 An example of a block diagram of a wireless communication device or network node is shown. DETAILED DESCRIPTION

[0016] Section headings are used in this document only to improve readability and do not limit the scope of the embodiments and techniques disclosed in each section to that section. Certain features are described using examples of fifth generation (5G) wireless protocols. However, the applicability of the disclosed techniques is not limited to 5G wireless systems.

[0017] When a UE moves from the coverage area of ​​one cell to another, at some point a serving cell change needs to be performed. Currently, serving cell changes are triggered by Layer 2 (L3) measurements and are performed via Radio Resource Control (RRC) signaling to trigger the reconfiguration of the PCell and PSCell synchronization changes and the addition of released SCells when appropriate. All cases involve a full L2 (and L1) reset, resulting in higher latency, higher overhead and longer disruption time compared to beam switching mobility. The goal of L1 / L2 mobility enhancements is to initiate serving cell changes via L1 / L2 signaling in order to reduce latency, overhead and disruption time.

[0018] This document provides, among other solutions, a beam indication method for L1 / L2 mobility enhancement.

[0019] At the 94th electronic meeting of the RAN Plenary Meeting, a new work item (WI) on further enhancing New Radio (NR) mobility was approved. The goal of this project is to initiate a serving cell change through L1 / L2 signaling, low latency, low overhead and low interruption time. In order to support cell changes, some enhancements to the TCI status indication need to be considered, such as the TCI status indication and application time in the case of TCI status indication of the candidate cell or target cell, together with the cell handover command, the related quasi-co-location (QCL) assumption, etc.

[0020] This document provides some feasible solutions to the above problems.

[0021] In this document, quasi-co-located QCL can be defined as: if the large-scale properties of the channel for transmitting symbols on one antenna port can be inferred from the channel for transmitting symbols on the other antenna port, then the two antenna ports are considered to be quasi-co-located. In the existing specifications, the QCL type includes one of the following: "QCL-TypeA", "QCL-TypeB", "QCL-TypeC", "QCL-TypeD", where 'typeA': {Doppler shift, Doppler spread, average delay, delay spread}; 'typeB': {Doppler shift, Doppler spread}; 'typeC': {Doppler shift, average delay}; 'typeD': {spatial Rx parameters}.

[0022] Currently, in the fifth generation (5G) protocol, TCI status is used to provide or indicate some information that helps signal transmission or reception. For example, TCI status may include QCL source reference signal, QCL type, cell information, path loss information, etc. Typically, TCI status only indicates large-scale properties that can be obtained from one or more reference signals. Reference signals can be considered as source reference signals. In addition, available TCI status can be configured or indicated for target reference signals or channels.

[0023] In this document, the term cell switching information or cell switching command may include at least one of the following: target cell (or cell group) identifier, target candidate cell (or cell group) identifier, timing advance (TA), synchronization signal (SS) / physical broadcast channel (PBCH) SS / PBCH block configuration or index, received signal strength indicator (RSSI) measurement timing configuration (RMTC), channel state information (CSI) reference signal (RS) CSI-RS configuration, CSI-RS resource set index, SRS resource index, SRS resource set index, CSI-RS resource index, CSI report configuration index, gap between consecutive CSI-RS transmission opportunities, number of CSI-RS transmission opportunities, TCI state index, beam indication, TCI state set, preamble index, frequency information, bandwidth part (Bandwidth Part, BWP) index, measurement gap, the number of times allowed to send cell switching commands or information, control resource set (ControlResourceSet, CORESET) information, search space information, one or more TCI states activated or updated, and enabling or maintaining one or more TCI states activated or updated.

[0024] The following description provides some example embodiments that provide various solutions to the problems discussed above and other problems.

[0025] Embodiment 1:

[0026] In this embodiment, we mainly introduce the signaling framework for indicating the TCI status.

[0027] In some examples, the TCI status of a candidate cell or a target cell may be indicated independently of or in conjunction with a cell handover command.

[0028] For the case where the TCI status indication of the candidate cell or target cell is combined with the cell handover command , at least one of the following methods can be used to indicate the TCI status:

[0029] -Method-1:

[0030] nStep-1: RRC configures TCI state pool or TCI state or TCI state set;

[0031] More details about the TCI status pool for at least one of the serving cell, candidate cell or target cell can be found in Example 2.

[0032] nStep-2: The Medium Access Control Element (MAC CE) used for the cell handover command indicates or updates one or two or more TCI states of the candidate cell or the target cell.

[0033] More details regarding the TCI status indication of at least one of the serving cell, candidate cell or target cell can be found in Example 4.

[0034] -Method-2:

[0035] nStep-1: RRC configures TCI state pool or TCI state or TCI state set;

[0036] More details about the TCI status pool for at least one of the serving cell, candidate cell or target cell can be found in Example 2.

[0037] nStep-2: MAC CE activates or deactivates at least one of the TCI state and the TCI state pool;

[0038] More details on activation or deactivation can be found in Example 3.

[0039] nStep-3: The MAC CE for the cell handover command indicates or updates one or two or more TCI states of the candidate cell or the target cell, where the TCI state is from at least one of an activated or deactivated TCI state and a TCI state pool.

[0040] More details regarding the TCI status indication of at least one of the serving cell, candidate cell or target cell can be found in Example 4.

[0041] -Method-3:

[0042] nStep-1: RRC configures TCI state pool or TCI state or TCI state set;

[0043] More details about the TCI status pool for at least one of the serving cell, candidate cell or target cell can be found in Example 2.

[0044] nStep-2: MAC CE activates or deactivates at least one of the TCI state and the TCI state pool;

[0045] More details on activation or deactivation can be found in Example 3.

[0046] nStep-3: The DCI indicates or selects one or more TCI states of the candidate cell or the target cell.

[0047] In some examples, if the target cell is unknown before the DCI indicates one or more TCI states for the candidate cell or the target cell, the DCI may indicate one or more TCI states for each candidate cell.

[0048] In some examples, if the target cell is known before the DCI indicates one or more TCI states of the candidate cell or the target cell, the DCI only indicates one or more TCI states of the target cell.

[0049] More details regarding the TCI status indication of at least one of the serving cell, candidate cell or target cell can be found in Example 4.

[0050] nStep-4: The MAC CE for the cell handover command indicates or updates one or two or more TCI states of the candidate cell or the target cell from the indicated or selected TCI states.

[0051] More details regarding the TCI status indication of at least one of the serving cell, candidate cell or target cell can be found in Example 4.

[0052] In some examples, the MAC CE used to trigger cell switching can indicate to the UE the same TCI state as the TCI state indicated by the DCI or another TCI state.

[0053] In some examples, after the DCI indicates one or more TCI states of the target cell, the MAC CE used to trigger cell switching no longer indicates the TCI state to the UE.

[0054] -Method-4: Beam information can be determined by QCL assumption between the source RS and the target RS.

[0055] More details on the relationship between QCL assumptions or RS can be found in Example 6.

[0056] For the case where the TCI status indication of the candidate cell or target cell is independent of the cell handover command , at least one of the following methods can be considered to indicate the TCI status:

[0057] - Method-1: A signaling framework similar to Rel-17 ICBM for indicating TCI status, for example, RRC+MAC CE, RRC+MAC CE+DCI.

[0058] For example, the RRC of the serving cell and / or the candidate cell configures a TCI state pool or a TCI state set; the MAC CE activates or deactivates one or L TCI states of the serving cell and / or the candidate cell; if the number of activated or deactivated TCI states is greater than or equal to a threshold, the DCI indicates one or K TCI states of the candidate cell or the target cell, where K is less than or equal to L.

[0059] -Method-2:

[0060] nStep-1: RRC configures TCI state pool or TCI state or TCI state set;

[0061] More details about the TCI status pool for at least one of the serving cell, candidate cell or target cell can be found in Example 2.

[0062] nStep-2: MAC CE directly activates or deactivates or updates one or more TCI states of the candidate cell or the target cell, and / or indicates or updates a TCI state to the UE to receive or send a DL or UL channel / signal from or to the target cell or the candidate cell.

[0063] In some examples, relevant details regarding activation or deactivation of a TCI state or TCI state pool may be found in Example 3.

[0064] More details regarding the TCI status indication of at least one of the serving cell, candidate cell or target cell can be found in Example 4.

[0065] -Method-3:

[0066] nStep-1: RRC configures TCI state pool or TCI state or TCI state set;

[0067] More details about the TCI status pool for at least one of the serving cell, candidate cell or target cell can be found in Example 2.

[0068] nStep-2: MAC CE directly activates or deactivates or updates one or more TCI states of the candidate cell or target cell.

[0069] In some examples, relevant details regarding activation or deactivation of a TCI state or TCI state pool may be found in Example 3.

[0070] nStep-3: The DCI indicates one or more TCI states to the UE to receive or send DL or UL channels / signals from or to the candidate cell or target cell. Optionally, an activated TCI state set of the target cell or candidate cell is maintained.

[0071] More details regarding the TCI status indication of at least one of the serving cell, candidate cell or target cell can be found in Example 4.

[0072] -Method-4:

[0073] nStep-1: RRC configures TCI state pool or TCI state or TCI state set;

[0074] More details about the TCI status pool for at least one of the serving cell, candidate cell or target cell can be found in Example 2.

[0075] nStep-2: MAC CE activates or deactivates or updates one or more TCI states of the candidate cell or the target cell.

[0076] In some examples, relevant details regarding activation or deactivation of a TCI state or TCI state pool may be found in Example 3.

[0077] nStep-3: MAC CE indicates one or more TCI states to the UE to receive or send DL or UL channels / signals from or to the candidate cell or target cell. Optionally, an activated TCI state set of the target cell or candidate cell is maintained.

[0078] More details regarding the TCI status indication of at least one of the serving cell, candidate cell or target cell can be found in Example 4.

[0079] Embodiment 2: (Relationship between TCI status pool and cell and configuration method)

[0080] In this embodiment, the relationship between the TCI state and the cell, and how to configure the TCI state for the cell or how the UE obtains the TCI state are disclosed. In some embodiments, the cell corresponds to at least one of a serving cell, a candidate cell, and a target cell.

[0081] Regarding the relationship between TCI status and cells, one of the following methods may be used:

[0082] Method-1: A joint TCI status pool may be used or configured for a cell.

[0083] The term "federated TCI state pool" may be replaced with one of a public TCI state pool, a public TCI state set, a public TCI state list, a federated TCI state set, a federated TCI state list, or other similar terms.

[0084] In some embodiments, the joint TCI state pool includes one or more TCI states. In some examples, it is assumed that the number of TCI states in the joint TCI state pool is M. M is an integer greater than or equal to 1. The (maximum) number of TCI states in the TCI state pool can be a configurable value or a fixed value or depends on the UE capability.

[0085] In some examples, the candidate cell is a potential target cell to be handed over. Assume that the number of candidate cells is N. Optionally, the number of candidate cells is an integer greater than or equal to 0 or 1. The (maximum) number of candidate cells may be a configurable value or a fixed value or depend on UE capabilities or measurement results.

[0086] In some examples, the joint TCI state pool includes M TCI states, which can be used for serving cells and / or candidate cells. X1 TCI states can be used for candidate cell #1, X2 TCI states can be used for candidate cell #2, ..., Xn TCI states can be used for candidate cell #N. Y TCI states can be used for serving cells. Optionally, the sum of X1, X2, ..., Xn and Y can be less than or equal to M. Optionally, the number of TCI states for each cell can be the same or different, or fixed or configurable or changeable. Optionally, the relationship or mapping between TCI states and cells can be defined or introduced or updated or yet to be implemented. This relationship or mapping can be determined or updated or changed by at least one of a default method, RRC signaling, a predefined method, MAC CE signaling, and DCI signaling.

[0087] exist Figure 1 In the example, it is assumed that there are 128 TCI states (corresponding to the TCI state pool) for the serving cell and the candidate cell. The number of candidate cells is 7. The number of TCI states is marked as X1, X2, X3, X4, X5, X6, X7, corresponding to candidate cells #1, #2, #3, #4, #5, #6, #7, respectively. For the serving cell, the number of TCI states is 128-X1-X2-X3-X4-X5-X6-X7.

[0088] Method-2: Separate TCI status pools can be used or configured for serving cells and candidate cells. Districts share a common TCI state pool.

[0089] Specifically, a TCI state pool (eg, a first TCI state pool) is used for a serving cell, and another TCI state pool (eg, a second TCI state pool) is used for a candidate cell, and the TCI state pool is shared or used in common by all candidate cells.

[0090] In some examples, it is assumed that the number of TCI states in the first TCI state pool is T. It is assumed that the number of TCI states in the second TCI state pool is S. Figure 2 As shown. T or S is an integer greater than or equal to 1. The (maximum) value of T or S may be a configurable value or a fixed value or depend on UE capabilities. Optionally, the number of TCI states in the first TCI state pool and the second TCI state pool may be the same or different.

[0091] In some examples, the candidate cell is a potential target cell for handing over the coverage of the UE. Assume that the number of candidate cells is N (a positive integer). Optionally, the number of candidate cells is an integer greater than or equal to 0 or 1. The (maximum) number of candidate cells may be a configurable value or a fixed value or may depend on UE capabilities or measurement results.

[0092] In some examples, the second TCI state pool includes S TCI states, which can be used for candidate cells. Among them, X1 TCI states can be used for candidate cell #1, X2 TCI states can be used for candidate cell #2, ..., Xn TCI states can be used for candidate cell #N. Optionally, the sum of X1, X2, ..., Xn-1 and Xn can be less than or equal to S. Optionally, the relationship or mapping between the TCI states in the second TCI state pool and the candidate cells can be defined or introduced or updated or yet to be implemented. Such a relationship or mapping can be determined or updated or changed by at least one of a default method, RRC signaling, a predefined method, MAC CE signaling and DCI signaling.

[0093] Method-3: Separate TCI status pools may be used or configured for the serving cell and candidate cells. Each selected cell has its own TCI status pool.

[0094] Here, it is assumed that the number of candidate cells is N. The candidate cells are potential target cells to be handed over.

[0095] Specifically, the first TCI state pool is used for the serving cell. N TCI state pools are used for candidate cells. The second TCI state pool is used for candidate cell #1, the third TCI state pool is used for candidate cell #2, ..., and the N+1th TCI state pool is used for candidate cell #N.

[0096] In some examples, it is assumed that the number of TCI states in the first TCI state pool is T. It is assumed that the number of TCI states in the second TCI state pool is S1, it is assumed that the number of TCI states in the third TCI state pool is S2, ..., it is assumed that the number of TCI states in the N+1th TCI state pool is S. N ,like Figure 3 As shown. T, S1, S2, ..., or S N is an integer greater than or equal to 1. T, S1, S2, ..., or S N The (maximum) value of may be a configurable value or a fixed value or may depend on UE capabilities. Optionally, the number of TCI states of different TCI state pools may be the same or different.

[0097] Regarding the configuration of the TCI state pool, you can consider one of the following methods:

[0098] For method-1, a joint TCI state pool may be configured under the serving cell, or may be configured outside the serving cell and candidate cell configurations.

[0099] For method-2, the first TCI state pool may be configured under the serving cell. The second TCI state pool may be configured under the candidate cell configuration or outside the candidate cell configuration.

[0100] For method-3, a first TCI state pool may be configured under a serving cell. N TCI state pools may be configured under a corresponding candidate cell configuration or outside a candidate cell configuration.

[0101] Embodiment 3:

[0102] In this embodiment, we mainly introduce the TCI state of the candidate cell or the target cell and / or the activation or deactivation of the TCI state pool.

[0103] Regarding the activation or deactivation of the TCI state of the candidate cell or the target cell, at least one of the following methods may be considered:

[0104] Method-1: Once a TCI state or TCI state pool is configured or indicated, the TCI state or TCI state pool is considered is activated without additional MAC CE signaling or activation signaling.

[0105] In some examples, the TCI state or TCI state pool is deactivated or updated through at least one of MAC CE signaling, RRC signaling, DCI signaling, and conditions. The condition may be one of a measurement result, an event, historical information, etc. The event may be a situation where the UE switches from one cell to another, or a measurement result is less than, equal to, or greater than a threshold, or other similar rules.

[0106] Method-2: Activate or deactivate W TCI states from the configured TCI states and / or TCI state pool.

[0107] In some examples, the signaling used for activation or deactivation can be at least one of MAC CE and DCI signaling.

[0108] In some examples, the device for activating or deactivating may be at least one of a UE, a network function, or a base station.

[0109] In some examples, the device may activate or deactivate P TCI state pools. In some examples, the TCI state pool may be used for a serving cell and / or a candidate cell. That is, the TCI state pool is associated with a serving cell and / or a candidate cell identifier.

[0110] In some examples, the device may activate or deactivate Q TCI states from at least one of a configured TCI state pool, an activated or deactivated TCI state pool.

[0111] In some examples, the device may activate or deactivate W TCI states. In some examples, the TCI state may be at least one of an activated or deactivated TCI state pool in a configured TCI state pool, an activated or deactivated TCI state pool, a TCI state of a configured TCI state pool, and a TCI state of an activated or deactivated TCI state pool.

[0112] In some examples, the TCI state is associated with or identified as uplink UL or downlink DL.

[0113] In some examples, P, Q or W is an integer greater than or equal to 1. The (maximum) value of P, Q or W may be a configurable value or a fixed value or depend on UE capabilities.

[0114] Note that any of the above methods can be used alone or in combination, such as Figures 4 to 12 shown.

[0115] Embodiment 4:

[0116] In this embodiment, we mainly introduce the TCI status indication of the candidate cell or the target cell. Optionally, the TCI status indication can be used for the serving cell.

[0117] In some examples, the TCI status of the candidate cell or target cell may be indicated together with the cell switching command to indicate the cell switching and / or some information.

[0118] In some examples, the TCI status of the candidate cell or target cell may be independent of the cell handover command indication.

[0119] In some examples, the signaling used to indicate the cell switching command may be MAC CE and / or DCI.

[0120] In some examples, the signaling used to indicate the TCI status can be MAC CE and / or DCI.

[0121] The indicated or updated TCI status may be based on at least one of the following:

[0122] nCase-1: TCI status pool is configured. Figure 4 as shown in .

[0123] nCase-2: The TCI status of the target cell in the configured TCI status pool. Figure 4 as shown in .

[0124] nCase 3: M2 TCI states are activated.

[0125] Case-3.1: M2 TCI states come from one or more different candidate cells, such as Figure 5 shown.

[0126] Case-3.2: M2 TCI states come from the activated TCI state pool, such as Figure 6 Optionally, the M2 TCI states may come from one or more different candidate cells.

[0127] Case-3.3: M2 TCI states are from the activated TCI states corresponding to one or more candidate cells, such as Figure 7 As shown. Optionally, an activated TCI state corresponding to one or more candidate cells is determined from a TCI state pool or an activated TCI state pool. Optionally, the M2 TCI states may come from one or more different candidate cells.

[0128] Case-3.4: M2 TCI states come from one or more TCI state pools. Each TCI state pool corresponds to a candidate cell. Fig.11 as shown in .

[0129] Case-3.5: M2 TCI states come from one or more activated TCI state pools. Each activated TCI state pool corresponds to a candidate cell, such as Fig.12 shown.

[0130] Case-3.6: M2 TCI states are from one or more activated TCI states corresponding to one or more different activated TCI state pools.

[0131] Case-4: Activated M iTCI states, where i is the index corresponding to the activated TCI state and / or TCI state pool.

[0132] Case-4.1: M i The TCI states come from the configured Si-1 TCI states or TCI state pool #i-1. TCI state pool #i-1 corresponds to candidate cell #i-1. i TCI states correspond to Si-1 TCI states or TCI state pool #i-1, such as Figure 8 shown.

[0133] Case -4.2: M i TCI states come from the corresponding activated Si-1 TCI states or TCI state pool #i-1. i Each TCI state corresponds to a corresponding Si-1 TCI state or TCI state pool #i-1, such as Fig. 9 shown.

[0134] Case -4.3: M i TCI states come from the corresponding activated TCI state pool #i-1. i Each TCI state corresponds to the corresponding TCI state pool #i-1, such as Fig.10 shown.

[0135] Embodiment 5:

[0136] In this embodiment, we mainly introduce the application time of the TCI status indication of the candidate cell or the target cell and / or the cell switching command.

[0137] In some examples, the TCI status of the candidate cell or the target cell may be indicated independently of the cell handover command or in conjunction with the cell handover command.

[0138] For the case where the TCI status indication of the candidate cell or the target cell is combined with the cell switching command, at least one of the following methods regarding the application time of the TCI status indication and / or the cell switching command may be considered:

[0139] Solution 1: The beam indication and cell switching command take effect at the same time

[0140] For scheme-1, the reference point for determining the application time of the beam indication and the cell switching command may be determined by at least one of the following options:

[0141] - Option-1: the end or start time of receiving MAC CE signaling or DCI signaling;

[0142] - Option-2: If confirmation corresponding to MAC CE signaling is required, it is the end or start time of sending the confirmation corresponding to MAC CE signaling.

[0143] In multiple embodiments, MAC CE or DCI signaling is used to indicate a cell switching command and / or a beam indication.

[0144] For scheme-1, the time gap for determining the application time of the beam indication and the cell switching command may be determined by at least one of the following options:

[0145] -Option-1: 3N, N is the number of subframes, time slots, symbols, or frames.

[0146] - Option-2: Define a new gap by considering at least one of the beam switching time, the cell (or cell group) switching time, and the timer used to determine whether the UE receives the MAC CE triggering the cell switching.

[0147] Solution-2: Beam indication and cell switching command take effect at independent times

[0148] Different from scheme-1, different time gaps may be defined for the application of beam indication and the application of cell switching command.

[0149] If the cell switching command takes effect earlier than the beam indication, the following methods can be considered:

[0150] - Data is sent or received only when beam indication is in effect.

[0151] -Send or receive data using the default beam.

[0152] - Abandon the current data sending or receiving.

[0153] If the effective time of the cell switching command is later than the effective time of the beam indication, the following methods can be considered:

[0154] - Delay sending or receiving until the cell switching command takes effect.

[0155] - Send information to avoid resending the cell handover command due to timer expiration.

[0156] For the case where the TCI status indication of the candidate cell or target cell is independent of the cell handover command , at least one of the following methods may be considered regarding the application time of the TCI status indication and / or the cell switching command:

[0157] In principle, there is no limit on the effective time of the beam indication and the cell switching command. However, it is best to make the beam indication and the cell switching command effective before the timer determines whether the UE receives the MAC CE that triggers the cell switching.

[0158] Embodiment 6:

[0159] In this embodiment, the Tracking Reference Signal (TRS) can be regarded as a type of CSI-RS. The TRS or CSI-RS can be periodic, semi-persistent or aperiodic; the CSI-RS can be one of the CSI-RS for CSI, CSI-RS beam management, CSI-RS for interference management, CSI-RS for mobility and other types of CSI-RS.

[0160] In some examples, the TRS may be configured by at least one of the following methods: configuring the TRS for a candidate cell or a target cell; configuring the TRS under a serving cell or a source cell; and associating the TRS with the candidate cell or the target cell.

[0161] In some examples, the SS / PBCH block may be configured by at least one of the following methods: configuring the SS / PBCH block for the candidate cell or the target cell; configuring the SS / PBCH block under the serving cell or the source cell; and associating the SS / PBCH block with the candidate cell or the target cell. Optionally, for CSI-RS or SRS, a method identical or similar to the above method may be applied.

[0162] In some examples, at least one of the following relationships may be defined: TRS is associated with SS / PBCH blocks, or is quasi-co-located with SS / PBCH blocks; TRS is associated with CSI-RS, or is quasi-co-located with CSI-RS; CSI-RS may be associated with SS / PBCH blocks, or is quasi-co-located with SS / PBCH blocks; TRS or SS / PBCH blocks or CSI-RS may be associated with or quasi-co-located with SRS, or PDSCH or PUSCH or PDCCH or PUCCH (referring to Physical Downlink Shared Channel, Physical Uplink Shared Channel, Physical Downlink Control Channel and Physical Uplink Control Channel) demodulation reference signal DMRS. The type of the above QCL may be at least one of QCL-TypeA, QCL-TypeB, QCL-TypeC and QCL-TypeD.

[0163] Note that one or more of the above methods may be used alone or in combination.

[0164] The following solutions can be implemented through some preferred embodiments.

[0165] 1. A wireless communication method, such as Fig.13 The method 1300 depicted in , includes: sending (1302) a message by a network device, the message including cell switching information and N TCI states, the N TCI states being used for one or more candidate cells or a target cell, where N is a positive integer.

[0166] 2. A wireless communication method, such as Fig.15 The method 1500 depicted in the embodiment includes: sending (1502) a message by a network device, the message indicating N TCI states, the N TCI states being used for one or more candidate cells or a target cell, wherein N is a positive integer, and the message does not include cell switching information.

[0167] 3. A wireless communication method, such as Fig.14 The method 1400 depicted in the figure includes: receiving (1402) a message by a wireless device from a network device, the message including cell switching information and N TCI states, the N TCI states being used for one or more candidate cells or a target cell, where N is a positive integer; and operating (1404) the wireless device according to the message.

[0168] 4. A wireless communication method, such as Fig.16 The method 1600 depicted in the figure includes: receiving (1602) a message by a wireless device from a network device, the message indicating N TCI states, the N TCI states being used for one or more candidate cells or a target cell, wherein N is a positive integer, and the message does not include cell switching information; and operating (1604) the wireless device according to the message.

[0169] In this document, operating a wireless device may include sending or receiving a data signal or a control signal. For example, the TCI state indicated to the UE may be used by the UE for the next transmission or reception of a signal.

[0170] Examples 1 to 5 provide additional details and examples for Solutions 1 to 4.

[0171] 5. The method according to any one of solutions 1 to 4, wherein a joint TCI state pool is configured to indicate N TCI states of at least one of the one or more candidate cells, target cells or serving cells. Embodiment 2, additional examples are disclosed in method 1.

[0172] 6. A method according to any one of solutions 1 to 4, wherein a common TCI state pool is configured to indicate N TCI states of at least one of the one or more candidate cells and the target cell, and another TCI state pool is configured to indicate the TCI state of the serving cell. Embodiment 2, additional examples are disclosed in Method 2.

[0173] 7. The method according to any one of solutions 1 to 4, wherein a separate TCI state pool is configured for at least one of the one or more candidate cells, target cells or serving cells. Additional examples are disclosed in Embodiment 2, Method 3.

[0174] 8. The method according to any one of solutions 1 to 7, wherein a specific TCI state is considered to be activated or deactivated or updated after configuration or indication without transmitting activation or deactivation or update signaling. Embodiment 3, additional examples are disclosed in method 1.

[0175] 9. The method according to any one of solutions 1 to 7, wherein the specific TCI state is activated or deactivated or updated by activation or deactivation or update signaling. Embodiment 3, additional examples are disclosed in method 2.

[0176] 10. The method according to any one of solutions 1 to 9, wherein the TCI state of at least one of a specific candidate cell, a target cell or a serving cell is activated or deactivated or updated by activation or deactivation or update signaling. Figure 7 Additional examples are disclosed.

[0177] 11. The method according to any one of solutions 1 to 10, wherein the TCI status pool of at least one of a specific candidate cell, a target cell or a serving cell is activated or deactivated or updated through activation or deactivation or update signaling. Fig.10 Additional examples are disclosed.

[0178] 12. According to the method of any one of solutions 8 to 11, the activated or deactivated or updated specific TCI state of the candidate cell or the target cell comes from at least one of the following:

[0179] A common TCI status pool of at least one of the one or more candidate cells or target cells;

[0180] A combination of one or more different candidate cell TCI states of a combined TCI state pool of at least one of the one or more candidate cells or target cells; and

[0181] The TCI state set corresponding to or associated with the candidate cell or the target cell;

[0182] An activated or deactivated or updated TCI state set or TCI state pool corresponding to or associated with the candidate cell or the target cell;

[0183] The activated or deactivated or updated TCI state set or TCI state pool from the activated or deactivated or updated candidate cell or target cell. Figures 6 to 12 Additional examples are disclosed.

[0184] 13. The method according to any one of solutions 1 to 4, wherein at least one of the indicated TCI state or cell switching information or cell switching command is applied or effective from a specific time.

[0185] 14. A method according to any one of solutions 1 to 4, wherein the indicated TCI state and cell switching information are effective at the same time.

[0186] 15. According to any one of solutions 1 to 4, the indicated TCI state and cell switching information or cell switching command have independent effective time. It should be understood that the solution discloses two cases, one of which is to send the TCI state and the cell switching information in the same cell switching command, and the other is to send the TCI state and the cell switching command separately (note that the cell switching command may not include the TCI state).

[0187] 16. A method according to any one of solutions 13 to 15, wherein the start time is determined based on at least one of a reference time or a location or a time interval.

[0188] 17. The method according to solution 16, wherein the reference time or location is at least one of: an end time or a start time of signaling corresponding to sending or receiving at least one of a TCI state or a cell handover command or a cell handover information;

[0189] an end time or a start time of sending or receiving at least one of a TCI state or a cell switching command or a cell switching information;

[0190] The end or start time of confirmation of sending or receiving;

[0191] an end time or a start time of sending or receiving a confirmation corresponding to signaling for sending or receiving at least one of a TCI state or a cell handover command or a cell handover information;

[0192] Or the end time or start time of the sending of the confirmation, which confirmation corresponds to the sending or receiving of at least one of the TCI status or cell switching command or cell switching information.

[0193] 18. The method according to solution 16, wherein the time interval is at least one of the following: M*N time units, where M and N are positive integers; a time gap.

[0194] 19. The method of solution 18, wherein the unit of N or M is a subframe, a time slot, a symbol or a frame.

[0195] 20. A method according to solution 18, wherein the time gap depends on at least one of the following: beam switching time, cell or cell group switching time, a timer for determining whether the wireless device receives a MAC CE for triggering cell switching, the capability of the wireless device, the first symbol or time slot or subframe or frame after a fixed time interval, or the time processing capability of the wireless device.

[0196] 21. The method according to solution 15, wherein in the case where the effective time of the cell switching command or the cell switching information is earlier than the effective time of the beam indication, at least one of the following is performed:

[0197] Data is sent or received only when beam indication is in effect;

[0198] Send or receive data using the default beam; or

[0199] Abandon the current data sending or receiving;

[0200] Or if the effective time of the cell switching command is later than the effective time of the beam indication, perform one of the following:

[0201] Delay sending or receiving until the cell switching command takes effect;

[0202] Send information to or receive information from the target cell to avoid resending the cell handover command.

[0203] 22. The method according to any one of solutions 1 to 21, wherein the indicated TCI state comes from at least one of the following: an activated or updated TCI state set, a configured TCI state pool, a cell switching command, or signaling.

[0204] 23. A method according to any one of solutions 1 to 22, wherein the signaling used to send a message including cell switching information for one or more candidate cells or target cells and N TCI states, or the signaling used to activate or deactivate or update or indicate relevant TCI state information includes at least one of DCI signaling or MAC CE signaling.

[0205] 24. A method according to any one of solutions 1 to 21, wherein the cell switching command or cell switching information includes at least one of the following: a target cell or cell group identifier, a target candidate cell or cell group identifier, a timing advance (TA), an SS / PBCH block configuration or index, an RSSI measurement timing configuration (RMTC), a CSI-RS configuration, a CSI-RS resource set index, an SRS resource index, an SRS resource set index, a CSI-RS resource index, a CSI report configuration index, a gap between consecutive CSI-RS transmission opportunities, a number of CSI-RS transmission opportunities, a TCI state index, a beam indication, a TCI state set, a preamble index, a frequency information, a bandwidth part (BWP) index, a measurement gap, a number of times the cell switching command or information is allowed to be sent, a control resource set (CORESET) information, a search space information, one or more TCI states that are activated or updated, and one or more TCI states that are activated or updated are enabled or maintained. For example, in some embodiments, the cell switching information or command may indicate a TCI state to be used for sending or receiving DL / UL data of the target cell. In addition, the information or command may also determine whether it is necessary to enable or maintain the activated or updated or other candidate TCI states of the target cell.

[0206] 25. A wireless communication method, for example, Fig.17 The method 1700 depicted in the embodiment of the present invention comprises:

[0207] Operation (1702) The wireless communication device transmits or receives an RS or a channel or a signal in a network, wherein it is assumed that the RS is quasi co-located (QCLed) with another RS. Additional examples and features are described with reference to Embodiment 6.

[0208] 26. A method according to solution 25, wherein the RS includes at least one of the following: a tracking reference RS (TRS), a synchronization signal, an SS / PBCH block, a CSI-RS, a DMRS of a PDSCH, a DMRS of a PDCCH, an SRS, a DMRS of a PUSCH, a DMRS of a PUCCH, or a path loss reference signal (PL-RS).

[0209] 27. The method of solution 26, wherein the type of TRS or CSI-RS is: periodic, semi-persistent or aperiodic.

[0210] 28. The method according to solution 25, wherein the RS is configured for the candidate cell or the target cell; the RS is configured for the serving cell or the source cell; the RS is configured under the candidate cell or the target cell; or the RS is associated with the candidate cell or the target cell.

[0211] 29. A method according to any one of solutions 25 to 28, wherein the RS is a source RS of the indicated TCI state.

[0212] 30. A method according to any one of solutions 25 to 29, wherein the wireless communication device includes a UE.

[0213] 31. A method according to any one of solutions 25 to 29, wherein the wireless communication device includes a base station.

[0214] 32. A wireless communication device, comprising a processor, wherein the processor is configured to execute the method according to any one of solutions 1 to 31.

[0215] 33. A computer-readable medium having codes stored thereon, which, when executed by a processor, cause the processor to perform the method according to any one of solutions 1 to 31.

[0216] Fig.18 An example of a wireless communication system (e.g., Long Term Evolution (LTE), 5G, or NR cellular network) including a BS 120 and one or more UEs 111, 112, and 113 is shown. In some embodiments, uplink transmissions (131, 132, 133) may include uplink control information (UCI), high-layer signaling (e.g., UE assistance information or UE capabilities), or uplink information. In some embodiments, downlink transmissions (141, 142, 143) may include DCI or high-layer signaling or downlink information. The UE may be, for example, a smartphone, a tablet computer, a mobile computer, a machine to machine (M2M) device, a terminal, a mobile device, an Internet of Things (IoT) device, and the like.

[0217] Fig.19205 is a block diagram representation of a portion of a device according to some embodiments of the disclosed technology. An apparatus 205, such as a network device or base station or wireless device (or UE), may include a processor electronic device 210, such as a microprocessor, that implements one or more technologies presented in this document. The apparatus 205 may include a transceiver electronic device 215 to send and / or receive wireless signals through one or more communication interfaces (such as antenna 220). The apparatus 205 may include other communication interfaces for sending and receiving data. The apparatus 205 may include one or more memories (not explicitly shown) configured to store information such as data and / or instructions. In some embodiments, the processor electronic device 210 may include at least a portion of the transceiver electronic device 215. In some embodiments, the apparatus 205 is used to implement at least some of the disclosed technologies, modules, or functions.

[0218] Those skilled in the art will appreciate that this document discloses a TCI state framework for indicating a TCI state (see Example 1). It will also be appreciated that this application discloses a TCI state pool for a serving cell and / or a candidate cell (see Example 2), activation or deactivation of a TCI state pool and / or a TCI state (see Example 3), a TCI state indication (see Example 4), application time of a TCI state indication and / or a cell switching command (see Example 5), and a QCL assumption (see Example 6).

[0219] Some embodiments described herein are described in the general context of methods or processes, which can be implemented in one embodiment by a computer program product (including computer executable instructions, such as program code, executed by a computer in a networked environment) contained in a computer-readable medium. Computer-readable media may include removable and non-removable storage devices, including but not limited to read-only memory (ROM), random access memory (RAM), compact disc (CD), digital versatile disc (DVD), etc. Therefore, computer-readable media may include non-transitory storage media. Generally, program modules may include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. Computer executable instructions or processor executable instructions, related data structures, and program modules represent examples of program codes for executing the steps of the methods disclosed herein. The specific order of these executable instructions or related data structures represents an example of corresponding actions for implementing the functions described in these steps or processes.

[0220] Some disclosed embodiments may be implemented as devices or modules using hardware circuits, software or combinations thereof. For example, a hardware circuit implementation may include discrete analog and / or digital components, which are, for example, integrated as a part of a printed circuit board. Alternatively or additionally, the disclosed components or modules may be implemented as application specific integrated circuits (Application Specific Integrated Circuit, ASIC) and / or field programmable gate arrays (Field Programmable Gate Array, FPGA) devices. Some embodiments may additionally or alternatively include a digital signal processor (Digital Signal Processor, DSP), which is a dedicated microprocessor with an optimized architecture for the operational requirements of digital signal processing associated with the functions disclosed in the present application. Similarly, various components or subcomponents within each module may be implemented with software, hardware or firmware. The connection between the components within the module and / or the module may be provided using any connection method and medium known in the art, including but not limited to communicating via the Internet, wired or wireless networks using suitable protocols.

[0221] Although this document contains many details, these details should not be understood as limitations on the scope of the claimed invention or the content that may be claimed, but rather as descriptions of features peculiar to a particular embodiment. Certain features described in the context of different embodiments in this document may also be implemented in a single embodiment in the form of a combination. On the contrary, the various features described in the context of a single embodiment may also be implemented in a plurality of embodiments, respectively, or in the form of any suitable sub-combination. In addition, although features may be described above as working in certain combinations and even initially claiming these features accordingly, one or more features from the combination may be deleted from the claimed combination in some cases, and the claimed combination may be for a sub-combination or a variation of a sub-combination. Similarly, although operations are described in a particular order in the accompanying drawings, this should not be understood as requiring these operations to be performed in the particular order or order shown or requiring all operations shown to be performed to obtain desired results.

[0222] From the foregoing it will be apparent that, although specific embodiments of the invention have been described herein for purposes of illustration, various modifications may be made without departing from the scope of the invention. Accordingly, the invention is not to be limited, except as by the appended claims.

[0223] Only a few implementations and examples are described, and other implementations, enhancements, and modifications may be made based on what is described and shown in this document.

Claims

1. A wireless communication method, comprising: A message is sent by a network device, the message including cell switching information and N transmission configuration indicator TCI states, the N transmission configuration indicator TCI states are used for one or more candidate cells or one target cell, where N is a positive integer.

2. A wireless communication method, comprising: A message is sent by a network device, where the message indicates N transmission configuration indicator TCI states, where the N transmission configuration indicator TCI states are used for one or more candidate cells or one target cell, where N is a positive integer, and the message does not include cell switching information.

3. A wireless communication method, comprising: Receiving, by a wireless device, a message from a network device, the message including cell handover information and N transmission configuration indicator (TCI) states, the N transmission configuration indicator (TCI) states being used for one or more candidate cells or a target cell, where N is a positive integer; as well as The wireless device is operated according to the message.

4. A wireless communication method, comprising: Receiving, by a wireless device, a message from a network device, the message indicating N transmission configuration indicator (TCI) states, the N transmission configuration indicator (TCI) states being used for one or more candidate cells or a target cell, wherein N is a positive integer, and the message does not include cell handover information; as well as The wireless device is operated according to the message.

5. The method according to any one of claims 1 to 4, wherein the joint TCI state pool is configured to indicate N TCI states of at least one of the one or more candidate cells, the target cell or the serving cell.

6. The method according to any one of claims 1 to 4, wherein a common TCI state pool is configured to indicate N TCI states, the N TCI states being used for at least one of the one or more candidate cells and the target cell, and another TCI state pool being configured to indicate the TCI state of the serving cell.

7. The method according to any one of claims 1 to 4, wherein a plurality of separate TCI state pools are configured for at least one of the one or more candidate cells, the target cell or the serving cell.

8. The method according to any one of claims 1 to 7, wherein a specific TCI state is considered to be activated or deactivated or updated after configuration or indication without transmitting activation or deactivation or update signaling.

9. The method according to any one of claims 1 to 7, wherein a specific TCI state is activated or deactivated or updated by activation or deactivation or update signaling.

10. The method according to any one of claims 1 to 9, wherein the TCI state of at least one of a specific candidate cell, a target cell or a serving cell is activated or deactivated or updated by activation or deactivation or update signaling.

11. The method according to any one of claims 1 to 10, wherein the TCI status pool of at least one of a specific candidate cell, a target cell or a serving cell is activated or deactivated or updated by activation or deactivation or update signaling.

12. According to the method of any one of claims 8 to 11, the activated or deactivated or updated specific TCI state of the candidate cell or the target cell is from at least one of the following: a common TCI state pool of at least one of the one or more candidate cells or the target cell, a combination consisting of one or more different candidate cell TCI states of a combined TCI state pool, wherein the combined TCI state pool consists of at least one of the one or more candidate cells or the target cell; a TCI state set corresponding to or associated with the candidate cell or the target cell; an activated or deactivated or updated TCI state set or TCI state pool corresponding to or associated with the candidate cell or the target cell; or An activated or deactivated or updated TCI state set or TCI state pool from the activated or deactivated or updated candidate cell or the target cell.

13. The method according to any one of claims 1 to 4, wherein at least one of the indicated TCI state or the cell switching information or the cell switching command is applied or effective from a specific time.

14. The method according to any one of claims 1 to 4, wherein the indicated TCI state and the cell switching information are effective at the same time.

15. The method according to any one of claims 1 to 4, wherein the indicated TCI state and the cell switching information or cell switching command have independent effective times.

16. The method according to any one of claims 13 to 15, wherein the start time is determined based on at least one of a reference time or a location or a time interval.

17. The method of claim 16, wherein the reference time or the location is at least one of: an end time or a start time of signaling, the signaling corresponding to sending or receiving at least one of the TCI state or the cell handover command or the cell handover information; an end time or a start time of sending or receiving at least one of the TCI state or the cell switching command or the cell switching information; The end or start time of confirmation of sending or receiving; an end time or a start time of sending or receiving a confirmation, the confirmation corresponding to signaling for sending or receiving at least one of the TCI state or the cell handover command or the cell handover information; or The end time or the start time of sending a confirmation, wherein the confirmation corresponds to sending or receiving at least one of the TCI status or the cell switching command or the cell switching information.

18. The method of claim 16, wherein the time interval is at least one of: M*N time units, where M and N are positive integers; or Time gap. The method according to claim 18 , wherein the unit of N or M is a subframe, a time slot, a symbol or a frame.

20. The method of claim 18, wherein the time gap depends on at least one of: a beam switching time, a cell or cell group switching time, a timer for determining whether the wireless device has received a media access control control element MAC CE for triggering a cell switching, the capability of the wireless device, the first symbol or time slot or subframe or frame after a fixed time interval, or the time processing capability of the wireless device.

21. The method of claim 15, wherein: If the effective time of the cell switching command or the cell switching information is earlier than the effective time of the beam indication, perform at least one of the following: Data is sent or received only when beam indication is in effect; Send or receive data using the default beam; or Abandon the current data transmission or reception; or If the effective time of the cell switching command is later than the effective time of the beam indication, perform one of the following: Delay sending or receiving until the cell switching command takes effect; or Send information to or receive information from the target cell to avoid resending the cell handover command.

22. The method according to any one of claims 1 to 21, wherein the indicated TCI state comes from at least one of: the activated or updated TCI state set, the configured TCI state pool, a cell handover command, or signaling.

23. A method according to any one of claims 1 to 22, wherein the signaling used to send the message includes at least one of downlink control information DCI signaling or MAC CE signaling, and the message includes cell switching information and N TCI states for the one or more candidate cells or the target cell, or signaling for activating or deactivating or updating or indicating relevant TCI state information.

24. The method according to any one of claims 1 to 21, wherein the cell switching command or cell switching information includes at least one of the following: a target cell or cell group identifier, a target candidate cell or cell group identifier, a timing advance TA, a synchronization signal / physical broadcast channel SS / PBCH block configuration or index, an RSSI measurement timing configuration RMTC, a CSI-RS configuration, a CSI-RS resource set index, an SRS resource index, an SRS resource set index, a CSI-RS resource index, a CSI report configuration index, a gap between consecutive CSI-RS transmission opportunities, a number of CSI-RS transmission opportunities, a TCI state index, a beam indication, a TCI state set, a preamble index, a frequency information, a bandwidth part BWP index, a measurement gap, a number of times a cell switching command or information is allowed to be sent, a control resource set CORESET information, a search space information, one or more TCI states activated or updated, and one or more TCI states activated or updated are enabled or maintained.

25. A wireless communication method, comprising: The wireless communication device is operated to send or receive a reference signal RS or a channel or a signal in a network, wherein it is assumed that the RS is quasi co-located QCLed with another RS.

26. The method according to claim 25, wherein the RS includes at least one of the following: a tracking reference RSTRS, a synchronization signal, a SS / PBCH block, a channel state information reference signal CSI-RS, a demodulation reference signal DMRS of a physical downlink shared channel PDSCH, a DMRS of a physical downlink control channel PDCCH, a sounding reference signal SRS, a DMRS of a physical uplink shared channel PUSCH, a DMRS of a physical uplink control channel PUCCH, or a path loss reference signal PL-RS.

27. The method of claim 26, wherein the type of the TRS or CSI-RS is: periodic, semi-persistent or aperiodic.

28. The method of claim 25, wherein: Configure RS for candidate cells or target cells; Configure RS for the serving cell or source cell; Configure RS in the candidate cell or target cell; or The RS is associated with the candidate cell or the target cell.

29. The method according to any one of claims 25 to 28, wherein the RS is a source RS of the indicated TCI state.

30. The method according to any one of claims 25 to 29, wherein the wireless communication device comprises a user equipment (UE).

31. The method of any one of claims 25 to 29, wherein the wireless communication device comprises a base station.

32. A wireless communication device comprising a processor configured to perform the method according to any one of claims 1 to 31.

33. A computer readable medium having stored thereon codes which, when executed by a processor, cause the processor to perform the method according to any one of claims 1 to 31.

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