Beam information determination for a channel or a signal
By defining the relationship between TCI state and RS index in cell switch commands, the solution enhances L1/L2 mobility, reducing latency and overhead in wireless communication systems by enabling efficient beam switching during cell transitions.
Patent Information
- Application Number
- PCT/CN2024/073255
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-01-19
- Publication Date
- 2025-07-24
AI Technical Summary
Current wireless communication systems face challenges in reducing latency, overhead, and interruption time during cell switching due to the need for complete L2 (and L1) resets, particularly in L1/L2 mobility enhancements, where the relationship between TCI state and RS index for CFRA is unclear, leading to inefficiencies in beam switching.
The solution involves clarifying the relationship between TCI state and RS index for contention-free random access (CFRA) by including TCI state and RS index in the cell switch command, enabling early DL synchronization and UL synchronization through MAC CE, and specifying beam application after random access procedures.
This approach reduces latency, overhead, and interruption time by enabling efficient L1/L2 mobility with pre-configured candidate cells, ensuring seamless beam switching during cell transitions.
Smart Images

Figure CN2024073255_24072025_PF_FP_ABST
Abstract
Description
BEAM INFORMATION DETERMINATION FOR A CHANNEL OR A SIGNALTECHNICAL FIELD
[0001] This patent document is directed generally to wireless communications.BACKGROUND
[0002] Mobile telecommunication technologies are moving the world toward an increasingly connected and networked society. In comparison with the existing wireless networks, next-generation systems and wireless communication techniques will need to support a much wider range of use-case characteristics and provide a more complex and sophisticated range of access requirements and flexibilities.
[0003] Long-Term Evolution (LTE) is a standard for wireless communication for mobile devices and data terminals developed by 3rd Generation Partnership Project (3GPP) . LTE Advanced (LTE-A) is a wireless communication standard that enhances the LTE standard. The 5th generation of wireless system, known as 5G, advances the LTE and LTE-Awireless standards and is committed to supporting higher data rates, large number of connections, ultra-low latency, high reliability, and other emerging business needs.SUMMARY
[0004] Techniques are disclosed for determining beam information based on relationships between a reference signal (RS) in a transmission configuration indication (TCI) state and a RS index in a random access procedure. Techniques are also disclosed for determining a TCI state application time.
[0005] An example wireless communication method includes performing, by a wireless device, an information transmission or reception using a spatial domain filter or a transmission configuration indication (TCI) state. The method further includes receiving, by the wireless device, a cell switch command or a signaling of a cell switch command. In some embodiments, the cell switch command or the signaling of the cell switch command includes at least one of a TCI state or a reference signal (RS) index for a random access procedure.
[0006] Note that where the patent document discloses a method of transmitting an information by a first device to a second device, it will be understood that a method of receiving the information by the second device from the first device is also disclosed.
[0007] In yet another example embodiment, a device that is configured or operable to perform the above-described methods is disclosed. The device includes at least one processor configured to implement the above-described methods.
[0008] In yet another example embodiment, the above-described methods are embodied in the form of processor-executable code and stored in a non-transitory computer-readable storage medium. The code included in the computer readable storage medium when executed by a processor, causes the processor to implement the methods described in this patent document.
[0009] The above and other aspects and their implementations are described in greater detail in the drawings, the descriptions, and the claims.BRIEF DESCRIPTION OF THE DRAWINGS
[0010] FIG. 1 illustrates example information in a cell switch command.
[0011] FIGS. 2-8 illustrate example transmission configuration indication (TCI) state application time.
[0012] FIG. 9 is an example flowchart for performing an information transmission or reception.
[0013] FIG. 10 illustrates an example block diagram of a hardware platform that may be a part of a network device or a wireless device.
[0014] FIG. 11 illustrates example wireless communication including a Base Station (BS) and User Equipments (UEs) based on some implementations of the disclosed technology.DETAILED DESCRIPTION
[0015] The example headings for the various sections below are used to facilitate the understanding of the disclosed subject matter and do not limit the scope of the claimed subject matter in any way. Accordingly, one or more features of one example section can be combined with one or more features of another example section. Furthermore, 5G terminology is used for the sake of clarity of explanation, but the techniques disclosed in the present document are not limited to 5G technology only and may be used in wireless systems that implemented other protocols.
[0016] I. Introduction
[0017] The present patent document describes beam information determination based on relationships between a reference signal (RS) in a transmission configuration indication (TCI) state and a RS index in a random access procedure.
[0018] When a user equipment (UE) moves from the coverage area of one cell to another cell, at some point a serving cell change needs to be performed. Currently serving cell change is triggered by L3 measurements and is done by radio resource control (RRC) signaling triggered reconfiguration with synchronization for change of primary cell (PCell) and primary secondary cell (PSCell) , as well as release add for secondary cells (SCells) when applicable. All cases involve complete L2 (and L1) resets, leading to greater latency, greater overhead, and longer interruption time than beam switch mobility. The goal of L1 / L2 mobility enhancements is to enable a serving cell change via L1 / L2 signaling, in order to reduce the latency, overhead, and interruption time. In Release 18 L1 / L2 triggered mobility, transmission configuration indication (TCI) state is allowed to be indicated in a cell switch command and a contention-free random access (CFRA) procedure can be triggered by the cell switch command. With this case, an open issue on relationship between TCI state and reference signal (RS) index for CFRA indicated in cell switch command needs to be clarified. Besides, some other issues also need to be clarified, such as which beam will be used for reception or transmission of a channel / signal of a target cell or during access procedure triggered or initiated after receiving the cell switch command, when TCI state indicated in the cell switch command will take effect and so on.
[0019] L1 / L2 triggered mobility is to enable a serving cell change via L1 / L2 signaling in order to reduce the latency, overhead, and interruption time by pre-configuration of multiple candidate cells by RRC, early L1 measurement reporting of target cells / beams, early downlink (DL) synchronization (TCI state activation) , early uplink (UL) synchronization (timing advance (TA) acquisition) , and cell switch using medium access control (MAC) control element (CE) . However, in Release 18 L1 / L2 triggered mobility, TCI state is allowed to be indicated in cell switch command. Besides, a CFRA is also allowed to be triggered by the cell switch command. Based on this, we need to discuss what relationship between RS in TCI state and RS index for CFRA is. Furthermore, legacy CFRA or contention-based random access (CBRA) can be initiated after cell switch command, then relationship between RS in TCI state in cell switch command and RS associated with random access channel (RACH) Occasion (RO) for legacy CFRA or CBRA also need to be clarified. And then after MAC CE based CFRA, legacy CFRA or CBRA, which beam will be applied to receive or transmit channel / signal from or to target cell, TCI state or RS identified during random access procedure. Finally, when TCI state indicated in cell switch command can be applied for UE is an issue to be clarified as well.
[0020] In the patent document, candidate cell can be equivalent to at least one of serving cell, non-serving cell, candidate cell, target cell.
[0021] In the patent document, cell can be PCell, SCell, secondary primary cell (SpCell) .
[0022] In the patent document, regarding configuration of TCI state:
[0023] In some examples, a list of TCI states is configured per candidate cell or for one or multiple candidate cells.
[0024] In some examples, a list of TCI state is configured by at least one of: RRC, MAC CE, downlink control information (DCI) , or pre-configuration.
[0025] In some examples, TCI state can be at least one of: joint TCI state, DL TCI state, UL TCI state.
[0026] In some examples, TCI state list can be configured based on UE capability, or TCI state list can be configured mandatorily or optionally.
[0027] In some examples, if TCI state list is configured before receiving handover command or cell switch command, UE can know TCI state related information in advance. In some cases, the TCI state list can be called as Lower-layer Triggered Mobility (LTM) TCI state list.
[0028] In some examples, if TCI state list is configured under serving cell or target cell, then UE cannot know the TCI state list related information till decoding related information included in cell switch command or handover command. In some cases, the TCI state list can be called legacy TCI state list or TCI state list.
[0029] In the patent document, regarding activation or deactivation and / or indication of TCI state:
[0030] In some examples, one or multiple TCI states can be activated or deactivated or updated by MAC CE for one or multiple candidate cells or MAC CE signaling or MAC CE for target cell.
[0031] In some examples, one or multiple TCI states can be activated or deactivated or update by MAC CE of cell switch command or MAC CE signaling.
[0032] In some examples, one or multiple TCI sates can be activated and indicated by MAC CE of cell switch command.
[0033] In some examples, one or multiple TCI states can be indicated by a DCI for one or multiple candidate cells.
[0034] In some examples, one or multiple TCI states can be indicated by a MAC CE or MAC CE of cell switch command.
[0035] In some examples, one or multiple TCI states for target cell or serving cell can be indicated by a MAC CE or MAC CE of cell switch command.
[0036] In the patent document, regarding TA acquisition for candidate cell or target cell:
[0037] In some examples, TA can be obtained before or by or after cell switch command, or when receiving cell switch command.
[0038] In some examples, cell switch command can be carried by a MAC CE signaling, or DCI signaling, or based on triggering condition.
[0039] In some examples, TA acquisition is configured or triggered before cell switch command, or when receiving cell switch command.
[0040] In some examples, TA can be acquired or TA acquisition is triggered by physical downlink control channel (PDCCH) order. In some examples, PDCCH order includes at least one of: a preamble index, a RS index, a physical random access channel (PRACH) mask index, an UL carrier indicator, a cell indicator, power ramping size, or the number of transmission. In some examples, RS can be at least one of: Synchronization Signal Block (SSB) , channel state information reference signal (CSI-RS) , Tracking Reference Signal (TRS) , demodulation reference signal (DMRS) , sounding reference signal (SRS) , phase tracking reference signal (PTRS) . In some examples, at least one of power ramping size, or the number of transmission can be configured by at least one of RRC or MAC CE or pre-configuration. In some examples, one or multiple values for at least one of power ramping size, or the number of transmission can be configured by at least one of RRC or MAC CE or pre-configuration. In some examples, at least one value for at least one of power ramping size, or the number of transmission can be indicated or configured by at least one of RRC, MAC CE, DCI, or pre-configuration.
[0041] In some examples, TA acquisition triggered by PDCCH order can be with Random Access Response (RAR) reception or without RAR reception.
[0042] In some examples, TA acquisition is configured or triggered by cell switch command, or when receiving cell switch command.
[0043] In some examples, cell switch command or MAC CE of cell switch command can trigger a contention-free random access (CFRA) or contention-based random access (CBRA) or two-step RACH for TA acquisition. In some examples, the TA is acquired for target cell.
[0044] In some examples, cell switch command or MAC CE of cell switch command includes at least one of: TCI state identification, TA identification, CSI acquisition identification, RS resource identification, RS resource set identification, trigger state identification, CSI reporting identification, offset in time and / or frequency domain, TRS tracking identification, beam application time, a preamble index, a RS index, a PRACH mask index, an UL carrier indicator, a cell indicator, power ramping size, the number of transmission, resource to preamble transmission, resource to data transmission, offset between resource for preamble transmission and resource for data transmission in time and / or frequency domain, timeline, or identification to indicate whether a specific feature is present.
[0045] In some examples, TA acquisition is configured or triggered after cell switch command, or when receiving cell switch command.
[0046] In some examples, CBRA or CFRA can be used for TA acquisition for target cell after cell switch command, or when receiving cell switch command.
[0047] In the patent document, quasi co location (QCL) type can be at least one of: Type A, Type B, Type C, Type D. 'typeA' : {Doppler shift, Doppler spread, average delay, delay spread} ; 'typeB' : {Doppler shift, Doppler spread} ; 'typeC' : {Doppler shift, average delay} ; 'typeD' : {Spatial Rx parameter} .
[0048] In the patent document, the information mentioned in claims includes at least one of: Channel State Information-Reference Signal (CSI-RS) , Synchronization Signal and PBCH block (SSB) , Sounding reference signal (SRS) , Demodulation Reference Signal (DMRS) , Tracking reference signal (TRS) , Physical Uplink Shared Channel (PUSCH) , Physical Downlink Shared Channel (PDSCH) , Physical Uplink Control Channel (PUCCH) , Physical Downlink Control Channel (PDCCH) , Control Resource Set (CORESET) , MSG1, MSG2, MSG3, MSG4, MSG A, or MSG B, data, Physical Random Access Channel (PRACH) , Random Access Response (RAR) , RACH occasion, Scheduling request (SR) .
[0049] In the patent document, MSG1 can be equivalent to “preamble” or “PRACH” . User equipment can transmit a preamble to base station. The preamble is transmitted on a RACH occasion.
[0050] In the patent document, MSG2 can be regarded as “RAR response” . That is to say, a UE attempts to detect a DCI format 1_0 or a DCI with CRC scrambled by a corresponding MsgB-RNTI or RA-RNTI during a window controlled by higher layers.
[0051] In the patent document, MSG A includes at least one of PRACH and PUSCH or data.
[0052] In the patent document, a random access procedure can be performed after cell switch command or a signaling of cell switch command or a signaling. In some examples, a random access procedure can be triggered by cell switch command, or a signaling of cell switch command, or a signaling. In some examples, related information for random access procedure can be included or indicated in cell switch command, or a signaling of cell switch command, or a signaling. In some examples, the related information can be at least one of: RS index, preamble index, a PRACH mask index, an UL carrier indicator, a cell indicator, power ramping size, the number of transmission, resource to preamble transmission, resource to data transmission, offset between resource for preamble transmission and resource for data transmission in time and / or frequency domain, timeline, or identification to indicate whether a specific feature is present.
[0053] In some examples, random access procedure includes at least one of preamble transmission (MSG1) , RAR reception (MSG2) , MSG3, MSG4, MSG A (preamble and / or data) , or MSG B.
[0054] In some examples, a UL / DL transmission or a channel / signal is transmitted after cell switch command or a signaling of cell switch command or a signaling. In some examples, transmission or a channel / signal can be at least one of: CSI-RS, SSB, SRS, DMRS, TRS, PUSCH, PDSCH, PUCCH, PDCCH, CORESET.
[0055] In some examples, a random access procedure can be performed after cell switch command or a signaling of cell switch command or a signaling, before a UL / DL channel / signal or data transmission.
[0056] In this patent document, relationships between RS in TCI state and RS index for CFRA triggered in cell switch command are described in embodiment 1, which includes embodiments 1-1 to 1-2. Relationships between RS in TCI state and RS index during legacy CFRA / CBRA after cell switch command are described in embodiment 2. QCL assumption or beam after legacy CFRA / CBRA or MAC CE based CFRA is described in embodiment 3. Definition of TCI state application time is described in embodiment 4. Default beam before TCI state takes effect is described in embodiment 5.
[0057] II. Embodiment 1
[0058] Embodiment 1 includes embodiments 1-1 and 1-2.
[0059] Embodiment 1-1
[0060] In the embodiment, cell switch command or a signaling of cell switch command or a signaling can include or indicate at least one of: TCI state, whether related information for random access procedure is present, RS index for random access procedure, preamble index, a PRACH mask index, an UL carrier indicator, a cell indicator, power ramping size, the number of transmission, resource to preamble transmission, resource to data transmission, offset between resource for preamble transmission and resource for data transmission in time and / or frequency domain, timeline. In some examples, one of the above information in cell switch command or a signaling of cell switch command or a signaling can be mandatory or optional.
[0061] In the embodiment, we will introduce or discuss relationship between TCI state and RS index for random access procedure, or between spatial domain filter corresponding to TCI state and spatial domain filter for information during random access procedure.
[0062] In some examples, at least one of the following can be considered:
[0063] In some examples, TCI state and RS index for random access procedure are present or indicated or included in cell switch command or a signaling of cell switch command or a signaling.
[0064] In some examples, TCI state is present or indicated or included in cell switch command or a signaling of cell switch command or a signaling.
[0065] In some examples, RS index for random access procedure is present or indicated or included in cell switch command or a signaling of cell switch command or a signaling.
[0066] In some examples, if TCI state is present or indicated or included in cell switch command or a signaling of cell switch command or a signaling, then RS index for random access is absent or not present in cell switch command or a signaling of cell switch command or a signaling.
[0067] In some examples, if TCI state is present or indicated or included in cell switch command or a signaling of cell switch command or a signaling, RS index for random access procedure can be present or indicated or included in cell switch command or a signaling of cell switch command or a signaling.
[0068] In some examples, if TCI state and RS index for random access procedure are present or indicated or included in cell switch command or a signaling of cell switch command or a signaling, at least one of the RS index, or a field to indicate RS index, or TCI state or a field to indicate TCI state is ignored.
[0069] In some examples, UE does not expect that RS index in TCI state is different from or not associated with RS index for random access procedure in cell switch command. In some examples, UE does not expect that spatial domain filter corresponding to TCI state is different from that corresponding to RS index for random access procedure.
[0070] In some examples, UE does not expect that TCI state and RS index are present or included or indicated in cell switch command simultaneously or together.
[0071] In some examples, UE does not expect that TCI state is present or included or indicated in cell switch command.
[0072] In some examples, UE does not expect that RS index is present or included or indicated in cell switch command.
[0073] In some examples, UE expects that RS index in TCI state is the same as or associated with RS index for random access in cell switch command. In some examples, UE expects that spatial domain filter corresponding to TCI state is same as that corresponding to RS index for random access procedure.
[0074] In some examples, UE expects that TCI state is present or included or indicated or absent in cell switch command.
[0075] In some examples, UE expects that RS index for random access procedure is present or included or indicated or absent in cell switch command.
[0076] In some examples, UE expects that TCI state and RS index are not present or included or indicated in cell switch command simultaneously or together.
[0077] In some examples, if TCI state and RS index are present or included or indicated in cell switch command simultaneously or together, which one will be used to determine RO for preamble transmission or relationship between TCI state and RS index for random access procedure can be determined by rule or based on UE capability. In some examples, the rule can refer to related method mentioned in this embodiment, or embodiment 1-1.
[0078] Embodiment 1-2
[0079] Regarding relationship between TCI state and RS index for contention-free random access, or relationship between TCI state and RS index for random access procedure, at least one of the following can be considered:
[0080] Alternative-1: RS in TCI state is same as a RS for random access procedure in cell switch command.
[0081] In some examples, RS can be at least one of: SSB, CSI-RS, TRS, SRS.
[0082] In some examples, at least one of the following can be considered:
[0083] Alternative-1-1: If SSB is included in TCI state, the SSB index in TCI state is the same as SSB index for random access procedure in cell switch command, or the SSB index in TCI state is the same as SSB index for random access procedure in cell switch command, as shown in FIG. 1. FIG. 1 shows information indicated or included in a cell switch command.
[0084] Alternative-1-2: If SSB is included in TCI state, the SSB index in TCI state is the same as SSB index associated with CSI-RS or TRS index for random access procedure in cell switch command. or the SSB index in TCI state is the same as SSB index associated with CSI-RS or TRS index for random access procedure in cell switch command.
[0085] Alternative-1-3: If TRS or CSI-RS is included in TCI state, a SSB index associated with TRS or CSI-RS in TCI state is the same as SSB index for random access procedure in cell switch command. or a SSB index associated with TRS or CSI-RS in TCI state is the same as SSB index for random access procedure in cell switch command.
[0086] Alternative-1-4: If TRS or CSI-RS is included in TCI state, a SSB index associated with TRS or CSI-RS in TCI state is the same as SSB index associated with CSI-RS or TRS index for random access procedure in cell switch command. or a SSB index associated with TRS or CSI-RS in TCI state is the same as SSB index associated with CSI-RS or TRS index for random access procedure in cell switch command.
[0087] Alternative-1-5: If SRS is included in TCI state, a SSB index associated with SRS in TCI state is same as SSB index for random access procedure in cell switch command. or a SSB index associated with SRS in TCI state is same as SSB index for random access procedure in cell switch command.
[0088] Alternative-1-6: If SRS is included in TCI state, a SSB index associated with SRS in TCI state is same as SSB index associated with CSI-RS or TRS index for random access procedure in cell switch command. or a SSB index associated with SRS in TCI state is same as SSB index associated with CSI-RS or TRS index for random access procedure in cell switch command.
[0089] Alternative-2: RS in TCI state is associated with a RS in cell switch command.
[0090] Alternative-2-1: If SSB is included in TCI state, the SSB index in TCI state is associated with SSB index for random access procedure in cell switch command. or the SSB index in TCI state is associated with SSB index for random access procedure in cell switch command.
[0091] Alternative-2-2: If SSB is included in TCI state, the SSB index in TCI state is associated with SSB index associated with CSI-RS or TRS index for random access procedure in cell switch command. or the SSB index in TCI state is associated with SSB index associated with CSI-RS or TRS index for random access procedure in cell switch command.
[0092] Alternative-2-3: If SSB is included in TCI state, the SSB index in TCI state is associated with CSI-RS or TRS index for random access procedure in cell switch command. or the SSB index in TCI state is associated with CSI-RS or TRS index for random access procedure in cell switch command.
[0093] Alternative-2-4: If TRS or CSI-RS is included in TCI state, a SSB index associated with TRS or CSI-RS in TCI state is associated with SSB index for random access procedure in cell switch command. or a SSB index associated with TRS or CSI-RS in TCI state is associated with SSB index for random access procedure in cell switch command.
[0094] Alternative-2-5: If TRS or CSI-RS is included in TCI state, TRS or CSI-RS in TCI state is associated with SSB index for random access procedure in cell switch command. or TRS or CSI-RS in TCI state is associated with SSB index for random access procedure in cell switch command.
[0095] Alternative-2-6: If TRS or CSI-RS is included in TCI state, a SSB index associated with TRS or CSI-RS in TCI state is associated with SSB index associated with CSI-RS or TRS index for random access procedure in cell switch command. or a SSB index associated with TRS or CSI-RS in TCI state is associated with SSB index associated with CSI-RS or TRS index for random access procedure in cell switch command.
[0096] Alternative-2-7: If TRS or CSI-RS is included in TCI state, a SSB index associated with TRS or CSI-RS in TCI state is associated with CSI-RS or TRS index for random access procedure in cell switch command. or a SSB index associated with TRS or CSI-RS in TCI state is associated with CSI-RS or TRS index for random access procedure in cell switch command.
[0097] Alternative-2-8: If TRS or CSI-RS is included in TCI state, TRS or CSI-RS in TCI state is associated with SSB index associated with CSI-RS or TRS index for random access procedure in cell switch command. or TRS or CSI-RS in TCI state is associated with SSB index associated with CSI-RS or TRS index for random access procedure in cell switch command.
[0098] Alternative-2-9: If TRS or CSI-RS is included in TCI state, TRS or CSI-RS in TCI state is associated with CSI-RS or TRS index for random access procedure in cell switch command. or TRS or CSI-RS in TCI state is associated with CSI-RS or TRS index for random access procedure in cell switch command.
[0099] Alternative-2-10: If SRS is included in TCI state, a SSB index associated with SRS in TCI state is associated with SSB index for random access procedure in cell switch command. or a SSB index associated with SRS in TCI state is associated with SSB index for random access procedure in cell switch command.
[0100] Alternative-2-11: If SRS is included in TCI state, SRS in TCI state is associated with SSB index for random access procedure in cell switch command. or SRS in TCI state is associated with SSB index for random access procedure in cell switch command.
[0101] Alternative-2-12: If SRS is included in TCI state, a SSB index associated with SRS in TCI state is associated with SSB index associated with CSI-RS or TRS index for random access procedure in cell switch command. or a SSB index associated with SRS in TCI state is associated with SSB index associated with CSI-RS or TRS index for random access procedure in cell switch command.
[0102] Alternative-2-13: If SRS is included in TCI state, a SSB index associated with SRS in TCI state is associated with CSI-RS or TRS index for random access procedure in cell switch command. or a SSB index associated with SRS in TCI state is associated with CSI-RS or TRS index for random access procedure in cell switch command.
[0103] Alternative-2-14: If SRS is included in TCI state, SRS in TCI state is associated with SSB index associated with CSI-RS or TRS index for random access procedure in cell switch command. or SRS in TCI state is associated with SSB index associated with CSI-RS or TRS index for random access procedure in cell switch command.
[0104] Alternative-2-15: If SRS is included in TCI state, SRS in TCI state is associated with CSI-RS or TRS index for random access procedure in cell switch command. or SRS in TCI state is associated with CSI-RS or TRS index for random access procedure in cell switch command.
[0105] Alternative-3: RS in TCI state is not limited as the same or different from or associated with a RS for random access procedure in cell switch command.
[0106] At least one of the following can be applied for any mentioned above.
[0107] In some examples, cell switch command can be equivalent to “asignaling” or “MAC CE of cell switch command” or “cell switch command MAC CE” .
[0108] In some examples, RS in cell switch command can be used to determine spatial domain filter or beam for contention free random access (CFRA) or contention based random access (CBRA) or random access or 4-step RACH or 2-steps RACH or information during random access procedure or TA acquisition.
[0109] In some examples, RS in TCI state can include or be equivalent to at least one of: SSB, CSI-RS, TRS, DMRS, PTRS, SRS.
[0110] In some examples, RS in cell switch command can include or be equivalent to at least one of: SSB, CSI-RS, TRS.
[0111] In some examples, TCI state can be indicated or included in cell switch command, or TCI state is indicated and / or activated before cell switch command.
[0112] In some examples, TCI state and / or RS index for random access procedure is associated with a target cell or serving cell or candidate cell.
[0113] In some examples, TCI state includes at least one of RS index, QCL type, cell identification, cell group identification, BWP identification, pathloss RS, power control, offset in time and / or frequency domain.
[0114] In some examples, CSI-RS can be used for at least one of: channel measurement, interference measurement, beam management, CSI acquisition, TRS tracking, Tracking, or, mobility. In some examples, CSI-RS can be at least one of: NZP CSI-RS, ZP CSI-RS, CSI-IM.
[0115] In some examples, QCL type can be at least one of: Type A, Type B, Type C, Type D.
[0116] In some examples, a signaling to trigger contention free random access (CFRA) or contention based random access (CBRA) or random access or 4-step RACH or 2-steps RACH or information during random access procedure or TA acquisition includes or indicates at least one of: a preamble index, a RS index, a PRACH mask index, an UL carrier indicator, a cell indicator, power ramping size, the number of transmission, resource to preamble transmission, resource to data transmission, offset between resource for preamble transmission and resource for data transmission in time and / or frequency domain, timeline, or identification to indicate whether a specific feature are present. In some examples, the signaling can be at least one of: a MAC CE, a DCI, a PDCCH order, a RRC. In some examples, MAC CE signaling can be a MAC CE of cell switch command.
[0117] Note that Cell switch command can trigger a CFRA or CBRA for target cell or serving cell. For the case of without RAR, UE will transmit a preamble to target cell or serving cell. But UE does not detect a DCI format 1_0 with CRC scrambled by a corresponding RA-RNTI; For the case of with RAR, UE will transmit a preamble to target cell or serving cell. In some examples, in response to a PRACH transmission, a UE attempts to detect a DCI format 1_0 with CRC scrambled by a corresponding RA-RNTI during a window. In this case, PRACH transmission is triggered by MAC CE signaling, or cell switch command, or MAC CE of cell switch command.
[0118] III. Embodiment 2
[0119] In order to acquire TA for target cell after receiving cell switch command, a random access procedure will need to be initiated or triggered or done.
[0120] In some examples, if TCI state is included or indicated in cell switch command, at least one of the following can be considered:
[0121] Case-1: Tx spatial filter for preamble transmission is determined based on SSB identified during random access procedure.
[0122] For case-1, another expression is UE follows a SSB identified during random access procedure for preamble transmission.
[0123] Case-2: Tx spatial filter for preamble transmission is determined based on RS associated with or same as RS indicated in TCI state.
[0124] In some examples, RS can be a SSB or CSI-RS identified during random access procedure, or SRS.
[0125] In some examples, RS indicated in TCI state can be at least one of SSB, CSI-RS, TRS, SRS.
[0126] For case-2, another expression is UE follows a SSB for preamble transmission that is same as SSB index indicated in TCI state.
[0127] For case-2, another expression is UE follows a SSB for preamble transmission that is same as SSB index associated with CSI-RS or TRS indicated in TCI state.
[0128] For case-2, another expression is UE follows a SSB for preamble transmission that is associated with SSB index indicated in TCI state.
[0129] For case-2, another expression is UE follows a SSB for preamble transmission that is associated with CSI-RS or TRS indicated in TCI state.
[0130] For case-2, another expression is UE follows a SSB for preamble transmission that is associated with SRS indicated in TCI state.
[0131] For case-2, another expression is UE follows a CSI-RS or TRS for preamble transmission that is same as CSI-RS or TRS index indicated in TCI state.
[0132] For case-2, another expression is UE follows a CSI-RS or TRS for preamble transmission that is same as CSI-RS or TRS index associated with SSB index indicated in TCI state.
[0133] For case-2, another expression is UE follows a CSI-RS or TRS for preamble transmission that is associated with SSB index indicated in TCI state.
[0134] For case-2, another expression is UE follows a CSI-RS or TRS for preamble transmission that is associated with SSB index associated with CSI-RS or TRS indicated in TCI state.
[0135] For case-2, another expression is UE follows a CSI-RS or TRS for preamble transmission that is associated with SSB index indicated in TCI state.
[0136] For case-2, another expression is UE follows a CSI-RS or TRS for preamble transmission that is associated with CSI-RS or TRS indicated in TCI state.
[0137] Case-3: Tx spatial filter for preamble transmission is determined based on RS indicated in TCI state.
[0138] In some examples, RS indicated in TCI state can be at least one of SSB, CSI-RS, TRS, SRS.
[0139] For case-3, another expression is UE follows SSB index indicated in TCI state for preamble transmission.
[0140] For case-3, another expression is UE follows CSI-RS or TRS index indicated in TCI state for preamble transmission.
[0141] Case-4: Tx spatial filter for preamble transmission is determined based on SSB that UE detected.
[0142] In some examples, the SSB is associated with RS. In some examples, the RS can be at least one of CSI-RS, or TRS. In some examples, the RS can be indicated in TCI state. In some examples, the TCI state is indicated in cell switch command, or before cell switch command, or after cell switch command.
[0143] In some examples, the SSB is associated with RS by one or multiple steps, or directly or indirectly.
[0144] Case-5: Tx spatial filter for preamble transmission is determined based on TRS or CSI-RS that UE detected.
[0145] In some examples, TRS or CSI-RS is associated with a SSB. In some examples, at least one of CSI-RS, TRS, SSB is included in TCI state. In some examples, the TCI state is indicated in cell switch command, or before cell switch command, or after cell switch command.
[0146] Note that if TCI state included or indicated in cell switch command is not applied before preamble transmission or RACH occasion, at least one of the following can be considered:
[0147] In some examples, Tx spatial filter for preamble transmission is determined based on SSB. In some examples, the SSB is measured and / or reported by UE or the SSB is the best SSB or the SSB corresponding to the strongest RSRP, or SSB is identified during random access procedure or SSB is detected or selected by UE. In some examples, the random access procedure is the latest random access procedure.
[0148] IV. Embodiment 3
[0149] In the embodiment, we will introduce UE behavior after random access procedure or which beam will be applied for transmission or reception of target cell.
[0150] In some examples, transmission or reception can include at least one of: CSI-RS, SSB, SRS, DMRS, TRS, PUSCH, PDSCH, PUCCH, PDCCH, CORESET.
[0151] At least one of the following methods can be considered:
[0152] Case-0: UE will apply TCI state for transmission or reception of target cell. In some examples, the TCI state is indicated in cell switch command or a signaling of cell switch command or a signaling. In some examples, the signaling can be at least one of: MAC CE, DCI, RRC.
[0153] Case-0-1: UE will apply spatial domain filter or beam during random access procedure for transmission or reception of target cell.
[0154] Case-1: UE follows spatial filter or QCL assumption as TCI state indicated in cell switch command for transmission or reception of target cell.
[0155] Case-1-0: UE follows spatial filter or QCL assumption as RS associated with or same as RS in TCI state indicated in cell switch command for transmission or reception of target cell.
[0156] Case-1-1: UE follows spatial filter or QCL assumption as SSB included in TCI state included or indicated in cell switch command.
[0157] Case-1-2: UE follows spatial filter or QCL assumption as SSB that is associated with or same as RS included in TCI state included or indicated in cell switch command.
[0158] In some examples, RS in TCI state can be at least one of TRS, CSI-RS, SSB. In some examples, SSB associated with RS in TCI state can be root QCL source RS, or non-root QCL source RS. In some examples, association can be determined by one or multiple steps, or directly or indirectly.
[0159] Case-1-3: UE follows spatial filter or QCL assumption as CSI-RS or TRS included in TCI state included or indicated in cell switch command.
[0160] Case-1-4: UE follows spatial filter or QCL assumption as CSI-RS or TRS that is associated with or same as RS included in TCI state included or indicated in cell switch command.
[0161] In some examples, RS in TCI state can be at least one of TRS, CSI-RS, SSB. In some examples, CSI-RS or TRS associated with RS in TCI state can be root QCL source RS, or non-root QCL source RS. In some examples, association can be determined by one or multiple steps, or directly or indirectly.
[0162] Case-2: UE follows spatial filter or QCL assumption as SSB or CSI-RS identified during random access procedure.
[0163] Case-2-1: UE follows spatial filter or QCL assumption as RS in TCI state that is associated with or same as SSB or CSI-RS identified during random access procedure.
[0164] In some examples, RS in TCI state can be at least one of TRS, CSI-RS, SSB. In some examples, association can be determined by one or multiple steps, or directly or indirectly.
[0165] Case-2-2: UE follows spatial filter or QCL assumption as SSB or CSI-RS identified during random access procedure that is associated with or same as RS in TCI state.
[0166] For at least one of cases mentioned above, UE follows or updates spatial filter or QCL assumption when a TCI state or new beam is indicated, or association between RSs, or RS and TCI state, TCI states is updated.
[0167] V. Embodiment 4
[0168] In the embodiment, we will introduce or discuss on TCI state application time.
[0169] In some examples, some potential TCI state application time can be found in FIG. 2. FIG. 2 shows various TCI state application time.
[0170] At least one of the following can be considered for application of TCI state:
[0171] Case-1: the TCI state in cell switch command is applied starting from the first slot or symbol that is after
[0172] In some examples, can be equivalent to “Y” in slot.
[0173] In some examples, X or Y is an integer equal to or greater than 0 or 1. In some examples, X or Y is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 30, 40, 50, 60, 70, 80, 90, 100, or any combination of above value. In some examples, X or Y is configured or indicated for serving cell or candidate cell or target cell. In some examples, X or Y can be configured or indicated or determined by at least one of DCI or MAC CE or RRC or pre-configuration or UE capability.
[0174] In some examples, TCI state is indicated in a cell switch command. In some examples, the cell switch command is received from serving cell.
[0175] In some examples, slot n is a slot where PUSCH or PUCCH with HARQ-ACK information corresponding to a PDSCH carrying a cell switch command or a slot where PDSCH carrying a cell switch command.
[0176] In some examples, u is the SCS configuration of PUCCH or PUSCH or PDSCH or serving cell or candidate cell or target cell, or smallest or largest SCS configuration of serving cell and candidate cell or target cell, or smallest or largest SCS configuration of signal / channel on serving cell and candidate cell or target cell.
[0177] In some examples, timeline or offset between cell switch command and PUSCH or PUCCH with HARQ-ACK information corresponding to a PDSCH carrying a cell switch command is determined by at least one of DCI or MAC CE or RRC or pre-configuration.
[0178] In some examples, Case-1 can be applied for the situation that at least one of: (1) the SCS of serving cell is same as the SCS of target cell or candidate cell; (2) the SCS of PDSCH carrying cell switch command is same as the SCS of PUCCH or PUSCH with HARQ-ACK information corresponding to a PDSCH carrying a cell switch command; (3) serving cell and candidate cell is in sync scenario or frame or slot alignment scenarios, as shown in FIG. 3. FIG. 3 shows case-1 of TCI state application time.
[0179] In the following, there are some variants of case-1 mentioned above.
[0180] Case-1-1: the TCI state in cell switch command is applied starting from the first slot or symbol that is after or or
[0181] In some examples, can be equivalent to “Y” in slot.
[0182] In some examples, Case-1-1 is applied for the situation that at least one of: (1) the SCS of serving cell is different from the SCS of target cell or candidate cell; (2) the SCS of PDSCH carrying cell switch command is different from the SCS of PUCCH or PUSCH with HARQ-ACK information corresponding to a PDSCH carrying a cell switch command; (3) serving cell and candidate cell is in sync scenario or frame or slot alignment scenarios.
[0183] In some examples, determining TCI state application time can be achieved by adjusting or scaling at least one of parameter n, X, u, Y.
[0184] In some examples, for the above formula, at least one of the following can be considered:
[0185] n is a slot containing a HARQ-ACK or acknowledgement corresponding to cell switch command or a slot where PDSCH carrying a cell switch command; In some examples, HARQ-ACK or acknowledgement corresponding to cell switch command can be transmitted or received on serving cell or candidate cell or target cell.
[0186] μPDSCH is a SCS configuration of PDSCH. In some examples, the PDSCH carries cell switch command. In some examples, PDSCH carrying cell switch command or PDSCH is transmitted on serving cell.
[0187] μPUCCH or PUSCH is a SCS configuration of PUCCH or PUSCH. In some examples, PUCCH or PUSCH carries HARQ-ACK or acknowledgement corresponding to cell switch command.
[0188] μserving cell is a SCS configuration for serving cell or of BWP or CC for serving cell;
[0189] μcandidate cell is a SCS configuration for candidate cell or of BWP or CC for candidate cell; In some examples, μcandidate cell can be equivalent to μtarget cell. μtarget cellis a SCS configuration for target cell or of BWP or CC for target cell.
[0190] μ1 is a SCS configuration for cell#1 or, BWP or CC or, of BWP or CC for cell#1 or a SCS configuration of channel #1 or signal or a SCS configuration of channel or signal for cell#1 or BWP or CC#1 or, of BWP or CC for cell#1;
[0191] μ2 is a SCS configuration for cell#2 or, BWP or CC or, of BWP or CC for cell#2 or a SCS configuration of channel or signal #2 or a SCS configuration of channel or signal for cell#2 or BWP or CC#2 or, of BWP or CC for cell#2;
[0192] u is the SCS configuration of PUCCH or PUSCH or PDSCH or serving cell or candidate cell or target cell, or smallest or largest SCS configuration of serving cell and candidate cell or target cell, or smallest or largest SCS configuration of signal / channel on serving cell and candidate cell or target cell.
[0193] X or Y is an offset relative to slot or symbol where HARQ-ACK or acknowledgement corresponding to cell switch command is transmitted or received or where PDSCH carrying cell switch command;
[0194] In some examples, HARQ-ACK corresponding to cell switch command is transmitted on serving cell or candidate cell or target cell. In some examples, HARQ-ACK corresponding to cell switch command is transmitted on PUCCH or PUSCH.
[0195] In some examples, for the case that HARQ-ACK corresponding to cell switch command is transmitted on serving cell, gap X after slot in candidate cell or target cell corresponding to slot where HARQ-ACK corresponding to cell switch command is transmitted on serving cell is configured or indicated or determined based on candidate cell or target cell, or SCS of candidate cell or target cell, TCI state application time is determined by:
[0196] In some examples or this patent document or this embodiment, for the case that HARQ-ACK corresponding to cell switch command is transmitted on candidate cell, slot where HARQ-ACK corresponding to cell switch command is transmitted on candidate cell is determined based on or In some examples, for the former, offset between slot where cell switch command is transmitted or received and slot where HARQ-ACK corresponding to cell switch command is transmitted or received is determined or indicated or configured based on candidate cell or target cell. For the latter, offset#1 between slot where cell switch command is transmitted or received and slot where HARQ-ACK corresponding to cell switch command is transmitted or received is determined or indicated or configured based on serving cell.
[0197] In some examples, as shown in FIG. 4, it is assumed that SCS of serving cell or PDSCH carrying cell switch command on serving cell is 30kHz. While SCS of candidate cell or target cell or PUCCH or PUSCH carrying HARQ-ACK corresponding to cell switch command is 15kHz. Cell switch command is transmitted by base station or network or received by UE on slot #2 on serving cell. HARQ-ACK corresponding to cell switch command is transmitted by UE on slot #4 (e.g., slot n) on serving cell. How to determine slot (e.g., slot n’ ) in candidate cell or target cell corresponding to slot where HARQ-ACK corresponding to cell switch command is transmitted or received on serving cell? A potential solution is Slot n’ = slot n * (2^u_PUCCH or PUSCH or serving cell / 2^u_candidate cell or target cell) = slot 4* (2^0 / 2^1) = slot 2. Note that gap after slot in candidate cell or target cell corresponding to slot where HARQ-ACK corresponding to cell switch command is transmitted on serving cell is 3 slot.
[0198] Based on determined slot in candidate cell or target cell corresponding to slot where HARQ-ACK corresponding to cell switch command to be transmitted or received on serving cell, the indicated TCI state is applied starting from the first slot or symbol that is after slot 5 (slot 2 + 3) .
[0199] In some examples, the indicated TCI state is applied starting from the first slot or symbol that is after slot (n+x*u_serving cell / u_candidate cell) * (u_candidate cell / u_serving cell) =slot (4 + 3*2^1 / 2^0) * (2^0 / 2^1) = slot 10*1 / 2=slot 5.
[0200] As shown in FIG. 5, assuming that SCS of serving cell or PDSCH carrying cell switch command on serving cell is 15kHz. While SCS of candidate cell or target cell or PUCCH or PUSCH carrying HARQ-ACK corresponding to cell switch command is 30kHz. Cell switch command is transmitted by base station or network or received by UE on slot #2 on serving cell. HARQ-ACK corresponding to cell switch command is transmitted by UE on slot #4 (e.g., slot n) on serving cell. How to determine slot (e.g., slot n’ ) or first slot in candidate cell or target cell corresponding to slot where HARQ-ACK corresponding to cell switch command is transmitted or received on serving cell? A potential solution is Slot n’ = slot n * (2^u_PUCCH or PUSCH or serving cell / 2^u_candidate cell or target cell) = slot 4* (2^1 / 2^0) = slot 8. In some cases, slot #9 on candidate cell or target cell besides slot #8 also corresponds to slot where HARQ-ACK corresponding to cell switch command is transmitted or received on serving cell. Note that gap after slot in candidate cell or target cell corresponding to slot where HARQ-ACK corresponding to cell switch command may be transmitted on serving cell is 3 slot. Based on slot in candidate cell or target cell corresponding to slot where HARQ-ACK corresponding to cell switch command to be transmitted or received on serving cell, the indicated TCI state is applied starting from the first slot or symbol that is after slot 11 (slot 8 + 3) or slot 12 (slot 9 + 3) .
[0201] In some examples, the indicated TCI state is applied starting from the first slot or symbol that is after slot (n+x) * (u_candidate cell / u_serving cell) =slot (4 + 3) * (2^1 / 2^0) = slot 7*2=slot 14.
[0202] Case-1-2: the TCI state in cell switch command is applied starting from the first slot or symbol that is after
[0203] In some examples, can be equivalent to “Y” in slot.
[0204] In some examples, for the above formula, at least one of the following can be considered:
[0205] n is a slot containing a HARQ-ACK or acknowledgement corresponding to cell switch command or a slot where PDSCH carrying a cell switch command; In some examples, HARQ-ACK or acknowledgement corresponding to cell switch command can be transmitted or received on serving cell or candidate cell or target cell.
[0206] X or Y is an offset relative to slot or symbol where HARQ-ACK or acknowledgement corresponding to cell switch command is transmitted or received or where PDSCH carrying cell switch command;
[0207] Z is a slot or frame offset between the serving cell and the candidate cell or target cell; In some examples, Z can be positive or negative value. In some examples, Z can be configured or indicated by at least one of RRC, MAC CE, DCI, pre-configuration, UE capability.
[0208] u is the SCS configuration of PUCCH or PUSCH or PDSCH or serving cell or candidate cell or target cell, or smallest or largest SCS configuration of serving cell and candidate cell or target cell, or smallest or largest SCS configuration of signal / channel on serving cell and candidate cell or target cell.
[0209] As shown in FIG. 6, cell switch command is transmitted by base station or network or received by UE on slot #2 on serving cell. HARQ-ACK corresponding to cell switch command is transmitted by UE on slot #4 (e.g., slot n) on serving cell. How to determine slot (e.g., slot n’ ) or first slot in candidate cell or target cell corresponding to slot where HARQ-ACK corresponding to cell switch command is transmitted or received on serving cell? A potential solution is Slot n’ = slot n + Z = slot 4 + 2 = slot 6. Note that gap after slot in candidate cell or target cell corresponding to slot where HARQ-ACK corresponding to cell switch command may be transmitted on serving cell is 3 slot. Based on slot in candidate cell or target cell corresponding to slot where HARQ-ACK corresponding to cell switch command to be transmitted or received on serving cell, the indicated TCI state is applied starting from the first slot or symbol that is after slot n + Z+ Y =9 (slot 4 +2 + 3) .
[0210] In some examples, “mod the number of slot in frame” is needed.
[0211] Case-1-3: the TCI state in cell switch command is applied starting from the first slot or symbol that is after or or
[0212] In some examples, can be equivalent to “Y” in slot.
[0213] In some examples, for the above formula, at least one of the following can be considered:
[0214] n is a slot containing a HARQ-ACK or acknowledgement corresponding to cell switch command or a slot where PDSCH carrying a cell switch command; In some examples, HARQ-ACK or acknowledgement corresponding to cell switch command can be transmitted or received on serving cell or candidate cell or target cell.
[0215] μPDSCH is a SCS configuration of PDSCH; In some examples, the PDSCH carries cell switch command. In some examples, PDSCH carrying cell switch command or PDSCH is transmitted on serving cell.
[0216] μPUCCH or PUSCH is a SCS configuration of PUCCH or PUSCH; In some examples, PUCCH or PUSCH carries HARQ-ACK or acknowledgement corresponding to cell switch command.
[0217] μserving cell is a SCS configuration for serving cell or of BWP or CC for serving cell;
[0218] μcandidate cell is a SCS configuration for candidate cell or of BWP or CC for candidate cell; In some examples, μcandidate cell can be equivalent to μtarget cell. μtarget cellis a SCS configuration for target cell or of BWP or CC for target cell.
[0219] μ1 is a SCS configuration for cell#1 or, BWP or CC or, of BWP or CC for cell#1 or a SCS configuration of channel #1 or signal or a SCS configuration of channel or signal for cell#1 or BWP or CC#1 or, of BWP or CC for cell#1;
[0220] μ2 is a SCS configuration for cell#2 or, BWP or CC or, of BWP or CC for cell#2 or a SCS configuration of channel or signal #2 or a SCS configuration of channel or signal for cell#2 or BWP or CC#2 or, of BWP or CC for cell#2;
[0221] umax {PUCCH or PUSCH, PDSCH} is a maximum SCS of a SCS of PUCCH or PUSCH and a SCS of PDSCH. In some examples, PUCCH or PUSCH carries HARQ-ACK or acknowledgement corresponding to cell switch command. In some examples, PDSCH carrying cell switch command or PDSCH is transmitted on serving cell.
[0222] umax {candidate cell, serving cell} is a maximum SCS configuration among SCSs of the serving cell and the candidate cell or target cell;
[0223] max {μ1, μ2} is a maximum SCS configuration among SCSs of cell#1 and cell #2, or BWP / CC#1 and BWP / CC#2, or BWP / CC in cell#1 and BWP / CC in cell#2, or channel / signal#1 and channel / signal#2, or channel or signal for cell / BWP / CC#1 and channel or signal for cell / BWP / CC#2, or channel or signal of cell / BWP / CC for cell#1 and channel or signal of cell / BWP / CC for cell#2.
[0224] u is the SCS configuration of PUCCH or PUSCH or PDSCH or serving cell or candidate cell or target cell, or smallest or largest SCS configuration of serving cell and candidate cell or target cell, or smallest or largest SCS configuration of signal / channel on serving cell and candidate cell or target cell.
[0225] Z is a slot or frame offset between the serving cell and the candidate cell or target cell; In some examples, Z can be positive or negative value. In some examples, Z can be configured or indicated by at least one of RRC, MAC CE, DCI, pre-configuration, UE capability.
[0226] X or Y is an offset relative to slot or symbol where HARQ-ACK or acknowledgement corresponding to cell switch command is transmitted or received or where PDSCH carrying cell switch command;
[0227] In some examples, “mod the number of slot in frame” is needed.
[0228] As shown in FIG. 7, assumed that SCS of serving cell or PDSCH carrying cell switch command on serving cell is 30kHz. While SCS of candidate cell or target cell or PUCCH or PUSCH carrying HARQ-ACK corresponding to cell switch command is 15kHz. Cell switch command is transmitted by base station or network or received by UE on slot #2 on serving cell. HARQ-ACK corresponding to cell switch command is transmitted by UE on slot #4 (e.g., slot n) on serving cell. How to determine slot (e.g., slot n’ ) or first slot in candidate cell or target cell corresponding to slot where HARQ-ACK corresponding to cell switch command is transmitted or received on serving cell? A potential solution is Slot n’ = slot n * (2^u_PUCCH or PUSCH or serving cell / 2^u_candidate cell or target cell) + Y = slot 4* (2^0 / 2^1) -1= slot 1. Note that gap after slot in candidate cell or target cell corresponding to slot where HARQ-ACK corresponding to cell switch command may be transmitted on serving cell is 3 slot. Based on slot in candidate cell or target cell corresponding to slot where HARQ-ACK corresponding to cell switch command to be transmitted or received on serving cell, the indicated TCI state is applied starting from the first slot or symbol that is after n * (2^u_PUCCH or PUSCH or serving cell / 2^u_candidate cell or target cell) + Y + X =4 (slot 4* (2^0 / 2^1) -1 + 3) .
[0229] In some examples, the indicated TCI state is applied starting from the first slot or symbol that is after slot (n+x) * (u_candidate cell / u_serving cell) +Z=slot (4 + 3) * (2^0 / 2^1) + 1=slot 7 / 2 + 1=slot 4.
[0230] As shown in FIG. 8, assumed that SCS of serving cell or PDSCH carrying cell switch command on serving cell is 15kHz. While SCS of candidate cell or target cell or PUCCH or PUSCH carrying HARQ-ACK corresponding to cell switch command is 30kHz. Cell switch command is transmitted by base station or network or received by UE on slot #2 on serving cell. HARQ-ACK corresponding to cell switch command is transmitted by UE on slot #4 (e.g., slot n) on serving cell. How to determine slot (e.g., slot n’ ) or first slot in candidate cell or target cell corresponding to slot where HARQ-ACK corresponding to cell switch command is transmitted or received on serving cell? A potential solution is Slot n’ = slot n * (2^u_PUCCH or PUSCH or candidate cell or target cell / 2^u_serving cell) = slot 4* (2^1 / 2^0) + 2 = slot 10. In some cases, slot #11 on candidate cell or target cell besides slot #10 also corresponds to slot where HARQ-ACK corresponding to cell switch command is transmitted or received on serving cell. Note that gap after slot in candidate cell or target cell corresponding to slot where HARQ-ACK corresponding to cell switch command may be transmitted on serving cell is 3 slot. Based on slot in candidate cell or target cell corresponding to slot where HARQ-ACK corresponding to cell switch command to be transmitted or received on serving cell, the indicated TCI state is applied starting from the first slot or symbol that is after slot 13 or slot 14.
[0231] In some examples, the indicated TCI state is applied starting from the first slot or symbol that is after slot (n+x) * (u_candidate cell / u_serving cell) +Z=slot (4 + 3) * (2^1 / 2^0) + 2=slot 7*2 + 2 =slot 16 or 17.
[0232] Case-2: the TCI state in cell switch command is applied starting from the first slot or symbol that is at least Y symbol or slot after starting or ending of slot or first or last symbol of PUCCH or PUSCH or PDSCH carrying cell switch command.
[0233] In some examples, PUCCH or PUSCH carries HARQ-ACK or acknowledgement corresponding to cell switch command. In some examples, HARQ-ACK or acknowledgement corresponding to cell switch command can be transmitted or received on serving cell or candidate cell or target cell.
[0234] In some examples, if HARQ-ACK or acknowledgement corresponding to cell switch command can be transmitted or received on serving cell, then slot in candidate cell or target cell corresponding to slot where HARQ-ACK corresponding to cell switch command to be transmitted or received on serving cell needs to be determined. In some examples, related methods can be found in other case.
[0235] In some examples, Y can be configured or indicated or determined based on at least one of RRC, MAC CE, DCI, pre-configuration, UE capability, or TCI state. In some examples, X can be at least one of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 30, 40, 50, 60, 70, 80, 90, 100 or any combination or operation of mentioned above. In some examples, operation can be at least one of plus, minus, times, divided by.
[0236] In some examples, the indicated TCI state is applied starting from the first slot or symbol after slot or symbol n + Y. In some examples, n is a slot or starting or ending of slot containing a HARQ-ACK or acknowledgement corresponding to cell switch command, or a slot or starting or ending of slot where PDSCH carrying cell switch command, or first or last symbol where a HARQ-ACK or acknowledgement corresponding to cell switch command is transmitted or received; In some examples, HARQ-ACK or acknowledgement corresponding to cell switch command can be transmitted or received on serving cell or candidate cell or target cell.
[0237] In some examples, if the SCS of serving cell is different from the SCS of target cell or candidate cell or the SCS of PDSCH carrying cell switch command is different from the SCS of PUCCH or PUSCH with HARQ-ACK information corresponding to a PDSCH carrying a cell switch command or serving cell and candidate cell is in sync scenario or frame or slot alignment scenarios, then at least one of n, Y is scaled based on (u_candidate cell / u_serving cell) , and / or adding Z value. In some examples, Z is a slot or frame offset between the serving cell and the candidate cell or target cell; In some examples, Z can be positive or negative value. In some examples, Z can be configured or indicated by at least one of RRC, MAC CE, DCI, pre-configuration, UE capability.
[0238] In some examples, Y can be configured or indicated or determined based on at least one of RRC, MAC CE, DCI, pre-configuration, UE capability, or TCI state. In some examples, X can be at least one of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 30, 40, 50, 60, 70, 80, 90, 100 or any combination or operation of mentioned above. In some examples, operation can be at least one of plus, minus, times, divided by.
[0239] Case-3: the TCI state in cell switch command is applied starting from preamble transmission or RACH occasion for preamble or MSG1 transmission or slot of RACH occasion for preamble or MSG1 transmission or the time where random access procedure starts.
[0240] Case-4: the TCI state in cell switch command is applied until the time UE transits first UL signal / channel or receives first DL signal / channel to or from target cell, or before first UL / DL signal / channel for transmission or reception of target cell.
[0241] Case-5: the TCI state in cell switch command is applied starting from the first slot or symbol that is after the completing of random access procedure.
[0242] Case-5-1: the TCI state in cell switch command is applied starting from the first slot or symbol that is at least W slot or symbol after the completing of random access procedure.
[0243] Case-5-2: the TCI state in cell switch command is applied starting from the first slot or symbol after information during random access procedure.
[0244] Case-5-3: the TCI state in cell switch command is applied starting from the first slot or symbol that is at least W slot or symbol after information during random access procedure.
[0245] Case-6: the TCI state in cell switch command is applied starting from the first slot or symbol that is after slot n + Y + Z.
[0246] In some examples, for the above formula, at least one of the following can be considered:
[0247] In some examples, n is a slot or starting or ending of slot containing a HARQ-ACK or acknowledgement corresponding to cell switch command, or a slot where PDSCH carrying a cell switch command, or first or last symbol where a HARQ-ACK or acknowledgement corresponding to cell switch command is transmitted or received; In some examples, HARQ-ACK or acknowledgement corresponding to cell switch command can be transmitted or received on serving cell or candidate cell or target cell.
[0248] In some examples, Y is an offset relative to slot or symbol where HARQ-ACK or acknowledgement corresponding to cell switch command is transmitted or received or where PDSCH carrying cell switch command.
[0249] In some examples, Z is the time including detecting or measuring RS in TCI state or RS associated with RS in TCI state, and / or RS processing and / or TCI state to be known or identified.
[0250] Case-7: the TCI state in cell switch command is applied starting from the first slot or symbol that is after cell switch command or information included in cell switch command is received and / or parsed and / or decoded and / or processed or cell switch delay.
[0251] In some examples, T can include at least one of Y, or Z.
[0252] In some examples, at least one of X, Y, Z, T can be at least one of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 30, 40, 50, 60, 70, 80, 90, 100 or any combination or operation of mentioned above. In some examples, operation can be at least one of plus, minus, times, divided by.
[0253] VI. Embodiment 5
[0254] After a UE receives a TCI state in cell switch command or indicated in cell switch command MAC CE and before applying the indicated TCI state, at least one of the following can be considered:
[0255] UE assumes that the UL TX spatial filter for preamble transmission or RACH occasion for preamble transmission is same as or quasi co-located with the SS / PBCH block or the CSI-RS resource the UE identified during the random access procedure or latest random access procedure;
[0256] UE assumes that SSB or CSI-RS associated with or for preamble transmission or RACH occasion for preamble transmission is same as or quasi co-located with the SS / PBCH block or the CSI-RS resource the UE identified during the random access procedure or latest random access procedure;
[0257] UE assumes that the UL TX spatial filter for preamble transmission or RACH occasion for preamble transmission is determined by or associated with RS index indicated in cell switch command or cell switch command MAC CE; in some examples, the RS index can be from reported RS that has been measured.
[0258] Regarding DMRS of PDCCH or PDSCH or CSI-RS, at least one of the following can be considered:
[0259] UE assumes that DM-RS of PDSCH and DM-RS of PDCCH, or CSI-RS is quasi co-located with or associated with the SS / PBCH block or the CSI-RS resource the UE identified during the random access procedure or latest random access procedure;
[0260] UE assumes that DM-RS of PDSCH and DM-RS of PDCCH or CSI-RS is quasi co-located with or associated with SS / PBCH block or CSI-RS indicated in TCI state or associated with RS indicated in TCI state; In some examples, TCI state can be indicated in or before or after cell switch command. In some examples, RS in TCI state can be at least one of SSB, CSI-RS, TRS, SRS, DMRS.
[0261] Regarding PUCCH or PUSCH or SRS, at least one of the following can be considered:
[0262] The UE assumes that the UL TX spatial filter for PUSCH and PUCCH or SRS is the same as or associated with that for a PUSCH transmission scheduled by a RAR UL grant during random access procedure or latest random access procedure;
[0263] The UE assumes that the UL TX spatial filter for PUSCH and PUCCH or SRS is the same as or associated with RS in TCI state or RS indicated in cell switch command; In some examples, TCI state can be indicated in or before or after cell switch command. In some examples, RS in TCI state can be at least one of SSB, CSI-RS, TRS, SRS, DMRS.
[0264] In some cases, UE assumes that SSB or CSI-RS associated with or for preamble transmission or RACH occasion for preamble transmission is same as or quasi co-located with SSB or CSI-RS or SRS indicated in TCI state.
[0265] In some cases, UE that the UL TX spatial filter for preamble transmission or RACH occasion for preamble transmission is same as or quasi co-located with the SS / PBCH block or the CSI-RS resource the UE identified during the random access procedure or latest random access procedure.
[0266] In some examples, random access procedure is initiated or triggered by PDCCH order or cell switch command or cell switch command MAC CE or RRC or rule. In some examples, random access procedure can includes or does not include at least one of: preamble transmission, MSG 1, MSG A, RAR reception, MSG 2, MSG 3, MSG 4, MSG B.
[0267] FIG. 9 is an example flowchart for performing an information transmission or reception. Operation 902 includes performing, by a wireless device, an information transmission or reception using a spatial domain filter or a transmission configuration indication (TCI) state. In some embodiments, the method can be implemented according to Embodiments 1-5. In some embodiments, performing further steps of the method can be based on a better system performance than a legacy protocol.
[0268] In some embodiments, the method further includes receiving, by the wireless device, a cell switch command or a signaling of a cell switch command. In some embodiments, the cell switch command or the signaling of the cell switch command includes at least one of a TCI state or a reference signal (RS) index for a random access procedure.
[0269] In some embodiments, the wireless device performs the information transmission or reception during a random access procedure if a random access procedure is initiated or triggered.
[0270] In some embodiments, at least one of the following applies: the wireless device applies a TCI state or a spatial domain filter corresponding to the TCI state used for the information transmission or reception; the wireless device applies a quasi co location (QCL) assumption or parameter of the TCI state used for the information transmission or reception; the wireless device applies a QCL assumption or parameter of a reference signal (RS) included in the TCI state used for the information transmission or reception; the wireless device applies a QCL assumption or parameter of a RS associated with a RS included in the TCI state used for the information transmission or reception; the wireless device applies a TCI state or a spatial domain filter corresponding to the TCI state used for the information transmission or reception during a random access procedure; the wireless device applies a QCL assumption or parameter of a TCI state or a spatial domain filter corresponding to the TCI state used for the information transmission or reception during a random access procedure; the wireless device applies a QCL assumption or parameter of a RS included in a TCI state or a spatial domain filter corresponding to the TCI state used for the information transmission or reception during a random access procedure; the wireless device applies a QCL assumption or parameter of a RS associated with a RS included in a TCI state or a spatial domain filter corresponding to the TCI state used for the information transmission or reception during a random access procedure; the wireless device applies a TCI state or a spatial domain filter corresponding to the TCI state used for the information transmission or reception after a random access procedure; the wireless device applies a QCL assumption or parameter of the TCI state used for the information transmission or reception after a random access procedure; the wireless device applies a QCL assumption or parameter of a RS included in the TCI state used for the information transmission or reception after a random access procedure; the wireless device applies a QCL assumption or parameter of a RS associated with a RS included in the TCI state used for the information transmission or reception after a random access procedure; the wireless device applies a QCL assumption or parameter or a spatial domain filter corresponding to an information during a random access procedure used for the information transmission or reception; the wireless device ignores a RS index for a random access procedure or a TCI state indicated in a cell switch command; or a RS index for a random access procedure is absent, not present, or included in a cell switch command.
[0271] In some embodiments, at least one of a TCI state or a reference signal (RS) index for a random access procedure is present, indicated, or included in a cell switch command, and at least one of the following applies: a field that indicates a RS index for a random access procedure is ignored, absent, or not present; a RS index for a random access procedure is ignored, absent, or not present; a TCI state is ignored, absent, or not present; a field that indicates a TCI state is ignored, absent, or not present; a RS index in a TCI state is same as or associated with a RS index for a random access procedure; or a RS index in a TCI state is different from or not associated with a RS index for a random access procedure.
[0272] In some embodiments, if a synchronization / physical broadcast channel (PBCH) signal block (SSB) is included in a TCI state, at least one of the following applies: a SSB index in a TCI state is same as or associated with a SSB index for a random access procedure; a SSB index associated with a SSB index in a TCI state is same as or associated with a SSB index for a random access procedure; a tracking reference signal (TRS) or a channel state information (CSI) reference signal (CSI-RS) associated with a SSB index in a TCI state is same as or associated with a SSB index for a random access procedure; a SSB index in a TCI state is same as or associated with a SSB index associated with a CSI-RS or a TRS for a random access procedure; a SSB index associated with a SSB index in a TCI state is same as or associated with a SSB index associated with a CSI-RS or a TRS for a random access procedure; a TRS or a CSI-RS associated with a SSB index in a TCI state is same as or associated with a SSB index associated with a CSI-RS or a TRS for a random access procedure; a SSB index in a TCI state is same as or associated with a CSI-RS or a TRS for a random access procedure; a SSB index associated with a SSB index in a TCI state is same as or associated with a CSI-RS or a TRS for a random access procedure; or a TRS or a CSI-RS associated with a SSB index in a TCI state is same as or associated with a CSI-RS or a TRS for a random access procedure.
[0273] In some embodiments, if a tracking reference signal (TRS) or a channel state information (CSI) reference signal (CSI-RS) is included in a TCI state, at least one of the following applies: a synchronization / physical broadcast channel (PBCH) signal block (SSB) index associated with a TRS or a CSI-RS in a TCI state is same as or associated with a SSB index for a random access procedure; a TRS or a CSI-RS in a TCI state is same as or associated with a SSB index for a random access procedure; a SSB index associated with a TRS or a CSI-RS in a TCI state is same as or associated with a SSB index associated with a CSI-RS or a TRS for a random access procedure; a SSB index associated with a TRS or a CSI-RS in a TCI state is same as or associated with a CSI-RS or a TRS for a random access procedure; a TRS or a CSI-RS in a TCI state is same as or associated with a SSB index associated with a CSI-RS or a TRS for a random access procedure; or a TRS or a CSI-RS in a TCI state is same as or associated with a CSI-RS or a TRS for a random access procedure.
[0274] In some embodiments, if a sounding reference signal (SRS) is included in a TCI state, at least one of the following applies: a synchronization / physical broadcast channel (PBCH) signal block (SSB) index associated with a SRS in a TCI state is same as or associated with a SSB index for a random access procedure; a SSB index associated with a SRS in a TCI state is same as or associated with a channel state information (CSI) reference signal (CSI-RS) or a tracking reference signal (TRS) for a random access procedure; a SSB index associated with a SRS in a TCI state is same as or associated with a SSB index associated with a CSI-RS or a TRS for a random access procedure; a SSB index associated with a SRS in a TCI state is same as or associated with a CSI-RS or a TRS associated with a SSB index for a random access procedure; a SRS in a TCI state is same as or associated with a SSB index for a random access procedure; a SRS in a TCI state is same as or associated with a CSI-RS or a TRS for a random access procedure; a SRS in a TCI state is same as or associated with a SSB index associated with a CSI-RS or a TRS for a random access procedure; or a SRS in a TCI state is same as or associated with a CSI-RS or a TRS associated with a SSB index for a random access procedure.
[0275] In some embodiments, at least one of the following applies: the wireless device does not expect that a reference signal (RS) index in a TCI state is different from or not associated with a RS index for a random access procedure; the wireless device does not expect that a TCI state and a RS index for a random access procedure are present, included, or indicated in a cell switch command simultaneously or together; the wireless device does not expect that a RS index for a random access procedure is present, included, or indicated in a cell switch command; the wireless device does not expect that a TCI state is present, included, or indicated in a cell switch command; the wireless device expects that a RS index in a TCI state is same as or associated with a RS index for a random access procedure; the wireless device expects that a TCI state and a RS index for a random access procedure are present, included, or indicated in a cell switch command simultaneously or together; the wireless device expects that a RS index for a random access procedure is absent, ignored, not present, not included, or not indicated in a cell switch command; or the wireless device expects that a TCI state is absent, ignored, not present, not included, or not indicated in a cell switch command.
[0276] In some embodiments, at least one of the following applies: a TCI state in a cell switch command or a signaling of a cell switch command is used to receive or transmit information during a random access procedure; a reference signal (RS) index in a cell switch command or a signaling of a cell switch command is used to receive or transmit information during a random access procedure; a spatial domain filter corresponding to a TCI state in a cell switch command or a signaling of a cell switch command is used to receive or transmit information during a random access procedure; a spatial domain filter of a RS index in a cell switch command or a signaling of a cell switch command is used to receive or transmit information during a random access procedure; a quasi co location (QCL) assumption or parameter of a TCI state in a cell switch command or a signaling of a cell switch command is used to receive or transmit information during a random access procedure; a QCL assumption or parameter of a RS index in a cell switch command or a signaling of a cell switch command is used to receive or transmit information during a random access procedure; a QCL assumption or parameter of a RS index identified by the wireless device is used to receive or transmit information during a random access procedure; a TCI state or a RS index used to receive or transmit information during a random access procedure is based on a user equipment (UE) capability; a spatial domain filter corresponding to a TCI state or of a RS index used to receive or transmit information during a random access procedure is based on a UE capability; or a QCL assumption or parameter of a TCI state or a RS index used to receive or transmit information during a random access procedure is based on a UE capability.
[0277] In some embodiments, at least one of the following applies: the wireless device applies a TCI state indicated in a cell switch command or a signaling of a cell switch command for receiving or transmitting information on a cell or a cell group; the wireless device applies a quasi co location (QCL) assumption or parameter of a TCI state indicated in a cell switch command or a signaling of a cell switch command for receiving or transmitting information on a cell or a cell group; the wireless device applies a spatial domain filter corresponding to a TCI state indicated in a cell switch command or a signaling of a cell switch command for receiving or transmitting information on a cell or a cell group; the wireless device applies a spatial domain filter used or identified during a random access procedure for receiving or transmitting information on a cell or a cell group; the wireless device applies a spatial domain filter that is same as that of a RS index for a random access procedure for receiving or transmitting information on a cell or a cell group; the wireless device applies a spatial domain filter corresponding to a RS included in a TCI state in a cell switch command or a signaling of a cell switch command for receiving or transmitting information on a cell or a cell group; the wireless device applies a spatial domain filter corresponding to a RS that is associated with a RS included in a TCI state in a cell switch command or a signaling of a cell switch command for receiving or transmitting information on a cell or a cell group; or the wireless device applies a spatial domain filter that is same as at least one of a TCI state or a RS index for a random access procedure or identified during a random access procedure for receiving or transmitting information on a cell or a cell group.
[0278] In some embodiments, a TCI state or a spatial domain filter corresponding to a TCI state or a reference signal (RS) index for a random access procedure is applied at a slot or symbol determined by at least one of the following: starting from a first slot or symbol that is at least T slots or symbols after a starting or ending slot or symbol of receiving a cell switch command or a signaling of a cell switch command that includes at least one of a TCI state or a RS index for a random access procedure; starting from a first slot or symbol that is at least T slots or symbols after a first or last slot or symbol of a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) with a hybrid automatic repeat request acknowledge (HARQ-ACK) information corresponding to a physical downlink shared channel (PDSCH) carrying a cell switch command or a signaling of a cell switch command that includes at least one of a TCI state or a RS index for a random access procedure; starting from a first slot or symbol that is at least T slots or symbols after a completion of a random access procedure; starting from a first slot or symbol that is after a completion of a random access procedure; starting from a first slot or symbol that is at least T slots or symbols after a completion of a TCI state being identified or known; starting from a first slot or symbol that is after a completion of a TCI state being identified or known; starting from a first slot or symbol that is after a completion of a cell switch; starting from a first slot or symbol that is after a cell switch delay; until a start of a slot or symbol of information transmission during a random access procedure; or starting from an ending slot or symbol of a completion of a random access procedure.
[0279] In some examples, cell switch delay can be replaced with “cell switch time. ”
[0280] In some examples, cell switch delay can be understood as the delay or time that is from starting or ending of slot containing cell switch command or signaling of cell switch command to starting or first slot or symbol where wireless device transmits or receives the first UL or DL channel or signal or information on target cell.
[0281] In some examples, cell switch delay can include at least one of the following: time between a signaling of cell switch command or cell switch command and PUSCH or PUCCH with HARQ-ACK information corresponding to PDSCH carrying a cell switch command or a signaling of cell switch command, time corresponding to X slots or symbols, time for at least one of ASN. 1 decoding, validity, compliance check for RRC configuration corresponding to target cell, time for UE processing, time for detecting first RS, time for RS processing, time for acquiring the first RACH occasion, time for RAR reception, time for MSG 3, time for MSG 4.
[0282] In some examples, one of the above mentioned time can be equal to 0, or a value greater than or equal to 1. the unit of value is one of millisecond, second, microsecond, slot, symbol, frame, subframe.
[0283] In some examples, UE processing can include at least one of applying one or more or all parameters corresponding to target cell, applying Layer 1 or Layer 2 change.
[0284] In some embodiments, a T value is determined based on at least one of the following: a user equipment (UE) capability, a radio resource control (RRC) signaling, a medium access control (MAC) control element (CE) signaling, a downlink control information (DCI) signaling, a pre-configuration, a time of a TCI state being known, a time for a UE processing, a time for a decoding and / or a checking of a RRC configuration of a cell, a time for an information transmission during a random access procedure, a time of a completion of a random access procedure, a time of a HARQ-ACK feedback corresponding to a PDSCH carrying a cell switch command or a signaling of a cell switch command.
[0285] In some embodiments, a T value is at least one of the following: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 30, 40, 50, 60, 70, 80, 90, 100, or any combination or operation of the abovementioned values.
[0286] In some embodiments, a TCI state in a cell switch command is applied starting from a first slot or symbol that is after a where one or more parameters are defined as follows: n is a slot where a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH) with a hybrid automatic repeat request acknowledge (HARQ-ACK) information corresponds to a physical downlink shared channel (PDSCH) carrying a cell switch command or where a PDSCH carries a cell switch command or a signaling of a cell switch command; X is an integer equal to or greater than 0 or 1; and u is a subcarrier spacing (SCS) configuration of an information on a serving cell or a target cell, a SCS configuration of a PUCCH, a PUSCH, a PDSCH, a serving cell, a candidate cell, or a target cell, a smallest or greatest SCS configuration of a serving cell and a candidate cell or a target cell, or a smallest or greatest SCS configuration of a signal or a channel on a serving cell and a candidate cell or a target cell.
[0287] In some embodiments, a TCI state in a cell switch command is applied starting from a first slot or symbol that is after a a or a where one or more parameters are defined as follows: n is a slot containing a hybrid automatic repeat request acknowledge (HARQ-ACK) or an acknowledgement corresponding to a cell switch command or where a physical downlink shared channel (PDSCH) carries a cell switch command or a signaling of a cell switch command; μPDSCH is a subcarrier spacing (SCS) configuration of a PDSCH; μPUCCH or PUSCH is a SCS configuration of a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) ; μserving cell is a SCS configuration, a bandwidth part (BWP) , or a component carrier (CC) for a serving cell; μcandidate cell is a SCS configuration, a BWP, or a CC for a candidate cell; μtarget cell is a SCS configuration, a BWP, or a CC for a target cell; μ1 is a SCS configuration, a BWP, or a CC for a first cell, a first channel, or a first signal; μ2 is a SCS configuration, a BWP, or a CC for a second cell, a second channel, or a second signal; X is an offset relative to a slot or symbol where a HARQ-ACK or an acknowledgement corresponding to a cell switch command is transmitted or received or where a PDSCH carries a cell switch command; and u is a SCS configuration of an information on a serving cell or a target cell, a SCS configuration of a PUCCH, a PUSCH, a PDSCH, a serving cell, a candidate cell, or a target cell, a smallest or greatest SCS configuration of a serving cell and a candidate cell or a target cell, or a smallest or greatest SCS configuration of a signal or a channel on a serving cell and a candidate cell or a target cell.
[0288] In some embodiments, a TCI state in a cell switch command is applied starting from a first slot or symbol that is after a where one or more parameters are defined as follows: n is a slot containing a hybrid automatic repeat request acknowledge (HARQ-ACK) or an acknowledgement corresponding to a cell switch command or where a physical downlink shared channel (PDSCH) carries a cell switch command or a signaling of a cell switch command; X is an offset relative to a slot or symbol where a HARQ-ACK or acknowledgement corresponding to a cell switch command is transmitted or received or where a PDSCH carries a cell switch command; Z is a slot or frame offset between a serving cell and a candidate cell or a target cell; and u is a subcarrier spacing (SCS) configuration of an information on a serving cell or a target cell, a SCS configuration of a physical uplink control channel (PUCCH) , a physical uplink shared channel (PUSCH) , a PDSCH, a serving cell, a candidate cell, or a target cell, a smallest or greatest SCS configuration of a serving cell and a candidate cell or a target cell, or a smallest or greatest SCS configuration of a signal or a channel on a serving cell and a candidate cell or a target cell.
[0289] In some embodiments, a TCI state in a cell switch command is applied starting from a first slot or symbol that is after a a or a where one or more parameters are defined as follows: n is a slot containing a hybrid automatic repeat request acknowledge (HARQ-ACK) or an acknowledgement corresponding to a cell switch command or where a physical downlink shared channel (PDSCH) carries a cell switch command or a signaling of a cell switch command; μPDSCH is a subcarrier spacing (SCS) configuration of a PDSCH; μPUCCH or PUSCH is a SCS configuration of a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) ; μserving cell is a SCS configuration, a bandwidth part (BWP) , or a component carrier (CC) for a serving cell; μcandidate cell is a SCS configuration, a BWP, or a CC for a candidate cell; μtarget cell is a SCS configuration, a BWP, or a CC for a target cell; μ1 is a SCS configuration, a BWP, or a CC for a first cell, a first channel, or a first signal; μ2 is a SCS configuration, a BWP, or a CC for a second cell, a second channel, or a second signal; umax {PUCCH or PUSCH, PDSCH} is a maximum SCS of a SCS of a PUCCH or a PUSCH and a SCS of a PDSCH; umax {candidate cell, serving cell} is a maximum SCS configuration among SCSs of a serving cell and a candidate cell or a target cell; max {μ1, μ2} is a maximum SCS configuration, a maximum BWP configuration, or a maximum CC configuration among SCSs, BWPs, or CCs of a first cell and a second cell, a first channel and a second channel, or a first signal and a second signal; Z is a slot or frame offset between a serving cell and a candidate cell or a target cell; X is an offset relative to a slot or symbol where a HARQ-ACK or an acknowledgement corresponding to a cell switch command is transmitted or received or where a PDSCH carries a cell switch command; and u is a SCS configuration of an information on a serving cell or a target cell, a SCS configuration of a PUCCH, a PUSCH, a PDSCH, a serving cell, a candidate cell, or a target cell, a smallest or greatest SCS configuration of a serving cell and a candidate cell or a target cell, or a smallest or greatest SCS configuration of a signal or a channel on a serving cell and a candidate cell or a target cell.
[0290] In some embodiments, a TCI state in a cell switch command is applied starting from a first slot or symbol that is at least X symbols or slots after a starting or an ending of a slot or a first or a last symbol of a physical uplink control channel (PUCCH) , a physical uplink shared channel (PUSCH) , or a physical downlink shared channel (PDSCH) carrying a cell switch command or a signaling of cell switch command, and X is an offset relative to a slot or symbol where a hybrid automatic repeat request acknowledge (HARQ-ACK) or an acknowledgement corresponding to a cell switch command is transmitted or received or where a PDSCH carries a cell switch command.
[0291] In some embodiments, a TCI state in a cell switch command is applied starting from a preamble transmission, a random access channel (RACH) occasion (RO) for a preamble or a MSG1 transmission, a slot of RO for a preamble or a MSG1 transmission, or a time when a random access procedure starts.
[0292] In some embodiments, a TCI state in a cell switch command is applied until a time when the wireless device transits a first uplink (UL) signal or channel or receives a first downlink (DL) signal or channel to or from a target cell.
[0293] In some embodiments, a TCI state in a cell switch command is applied starting from a first slot or symbol that is after a completing of a random access procedure.
[0294] In some embodiments, a TCI state in a cell switch command is applied starting from a first slot or symbol that is after a slot n + X + Z, where one or more parameters are defined as follows: n is a slot or a starting or an ending of a slot containing a hybrid automatic repeat request acknowledge (HARQ-ACK) or an acknowledgement corresponding to a cell switch command, a slot where a physical downlink shared channel (PDSCH) carries a cell switch command or a signaling of a cell switch command, or a first or a last symbol where a HARQ- ACK or an acknowledgement corresponding to a cell switch command is transmitted or received; X is an offset relative to a slot or symbol where a HARQ-ACK or an acknowledgement corresponding to a cell switch command is transmitted or received or where a PDSCH carries a cell switch command; and Z is a time including detecting or measuring a reference signal (RS) in a TCI state or a RS associated with a RS in a TCI state and / or processing a RS.
[0295] In some embodiments, a TCI state in a cell switch command is applied starting from a first slot or symbol that is after a cell switch command or an information included in a cell switch command is received, parsed, decoded, and / or processed.
[0296] In some embodiments, the information transmitted or received includes at least one of the following: a channel state information (CSI) reference signal (CSI-RS) , a synchronization / physical broadcast channel (PBCH) signal block (SSB) , a sounding reference signal (SRS) , a demodulation reference signal (DMRS) , a tracking reference signal (TRS) , a physical uplink shared channel (PUSCH) , a physical downlink shared channel (PDSCH) , a physical uplink control channel (PUCCH) , a physical downlink control channel (PDCCH) , a control resource set (CORESET) , a MSG1, a MSG2, a MSG3, a MSG4, a MSG A, a MSG B, a data, a physical random access channel (PRACH) , a random access response (RAR) , a random access channel (RACH) occasion (RO) , or a scheduling request (SR) .
[0297] FIG. 10 shows an example block diagram of a hardware platform 1000 that may be a part of a network device (e.g., a base station (BS) or a transmission and reception point (TRP) ) or a wireless device (e.g., a user equipment (UE) ) . The hardware platform 1000 includes at least one processor 1010 and a memory 1005 having instructions stored thereupon. The instructions upon execution by the processor 1010 configure the hardware platform 1000 to perform the operations described in FIGS. 1 to 9 and in the various embodiments described in this patent document. The transmitter 1015 transmits or sends information or data to another device. For example, a network device transmitter can send a message to a user equipment. The receiver 1020 receives information or data transmitted or sent by another device. For example, a user equipment can receive a message from a network device. For example, a UE, a wireless device, or a network device, as described in the present document, may be implemented using the hardware platform 1000.
[0298] The implementations as discussed above will apply to a wireless communication. FIG. 11 shows an example of a wireless communication system (e.g., a 5G or NR cellular network) that includes a base station 1120 and one or more user equipment (UE) 1111, 1112, and 1113. In some embodiments, the UEs access the BS (e.g., the network) using a communication link to the network (sometimes called uplink direction, as depicted by dashed arrows 1131, 1132, 1133) , which then enables subsequent communication (e.g., shown in the direction from the network to the UEs, sometimes called downlink direction, shown by arrows 1141, 1142, 1143) from the BS to the UEs. In some embodiments, the BS sends information to the UEs (sometimes called downlink direction, as depicted by arrows 1141, 1142, 1143) , which then enables subsequent communication (e.g., shown in the direction from the UEs to the BS, sometimes called uplink direction, shown by dashed arrows 1131, 1132, 1133) from the UEs to the BS. The UE may be, for example, a smartphone, a tablet, a mobile computer, a machine to machine (M2M) device, an Internet of Things (IoT) device, and so on. The UEs described in the present document may be communicatively coupled to the base station 1120 depicted in FIG. 11.
[0299] It will be appreciated by one of skill in the art that the present patent document discloses methods of determining beam information based on relationships between a reference signal (RS) in a transmission configuration indication (TCI) state and a RS index in a random access procedure. Techniques are also disclosed for determining a TCI state application time. The patent document improves cell switching efficiencies.
[0300] Some of the embodiments described herein are described in the general context of methods or processes, which may be implemented in one embodiment by a computer program product, embodied in a computer-readable medium, including computer-executable instructions, such as program code, executed by computers in networked environments. A computer-readable medium may include removable and non-removable storage devices including, but not limited to, Read Only Memory (ROM) , Random Access Memory (RAM) , compact discs (CDs) , digital versatile discs (DVD) , etc. Therefore, the computer-readable media can include a non-transitory storage media. Generally, program modules may include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. Computer-or processor-executable instructions, associated data structures, and program modules represent examples of program code for executing steps of the methods disclosed herein. The particular sequence of such executable instructions or associated data structures represents examples of corresponding acts for implementing the functions described in such steps or processes.
[0301] Some of the disclosed embodiments can be implemented as devices or modules using hardware circuits, software, or combinations thereof. For example, a hardware circuit implementation can include discrete analog and / or digital components that are, for example, integrated as part of a printed circuit board. Alternatively, or additionally, the disclosed components or modules can be implemented as an Application Specific Integrated Circuit (ASIC) and / or as a Field Programmable Gate Array (FPGA) device. Some implementations may additionally or alternatively include a digital signal processor (DSP) that is a specialized microprocessor with an architecture optimized for the operational needs of digital signal processing associated with the disclosed functionalities of this application. Similarly, the various components or sub-components within each module may be implemented in software, hardware, or firmware. The connectivity between the modules and / or components within the modules may be provided using any one of the connectivity methods and media that is known in the art, including, but not limited to, communications over the Internet, wired, or wireless networks using the appropriate protocols.
[0302] While this document contains many specifics, these should not be construed as limitations on the scope of an invention that is claimed or of what may be claimed, but rather as descriptions of features specific to particular embodiments. Certain features that are described in this document in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable sub-combination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a sub-combination or a variation of a sub-combination. Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results.
[0303] Only a few implementations and examples are described, and other implementations, enhancements and variations can be made based on what is described and illustrated in this patent document.
Claims
1.A method of wireless communication, comprising:performing, by a wireless device, an information transmission or reception using a spatial domain filter or a transmission configuration indication (TCI) state.2.The method of claim 1, further comprising:receiving, by the wireless device, a cell switch command or a signaling of a cell switch command.3.The method of claim 2, wherein the cell switch command or the signaling of the cell switch command comprises at least one of a TCI state or a reference signal (RS) index for a random access procedure.4.The method of any of claims 1-3, wherein the wireless device performs the information transmission or reception during a random access procedure if a random access procedure is initiated or triggered.5.The method of any of claims 1-4, wherein at least one of the following applies:the wireless device applies a TCI state or a spatial domain filter corresponding to the TCI state used for the information transmission or reception;the wireless device applies a quasi co location (QCL) assumption or parameter of the TCI state used for the information transmission or reception;the wireless device applies a QCL assumption or parameter of a reference signal (RS) included in the TCI state used for the information transmission or reception;the wireless device applies a QCL assumption or parameter of a RS associated with a RS included in the TCI state used for the information transmission or reception;the wireless device applies a TCI state or a spatial domain filter corresponding to the TCI state used for the information transmission or reception during a random access procedure;the wireless device applies a QCL assumption or parameter of a TCI state or a spatial domain filter corresponding to the TCI state used for the information transmission or reception during a random access procedure;the wireless device applies a QCL assumption or parameter of a RS included in a TCI state or a spatial domain filter corresponding to the TCI state used for the information transmission or reception during a random access procedure;the wireless device applies a QCL assumption or parameter of a RS associated with a RS included in a TCI state or a spatial domain filter corresponding to the TCI state used for the information transmission or reception during a random access procedure;the wireless device applies a TCI state or a spatial domain filter corresponding to the TCI state used for the information transmission or reception after a random access procedure;the wireless device applies a QCL assumption or parameter of the TCI state used for the information transmission or reception after a random access procedure;the wireless device applies a QCL assumption or parameter of a RS included in the TCI state used for the information transmission or reception after a random access procedure;the wireless device applies a QCL assumption or parameter of a RS associated with a RS included in the TCI state used for the information transmission or reception after a random access procedure;the wireless device applies a QCL assumption or parameter or a spatial domain filter corresponding to an information during a random access procedure used for the information transmission or reception;the wireless device ignores a RS index for a random access procedure or a TCI state indicated in a cell switch command; ora RS index for a random access procedure is absent, not present, or included in a cell switch command.6.The method of any of claims 1-5, wherein at least one of a TCI state or a reference signal (RS) index for a random access procedure is present, indicated, or included in a cell switch command, and wherein at least one of the following applies:a field that indicates a RS index for a random access procedure is ignored, absent, or not present;a RS index for a random access procedure is ignored, absent, or not present;a TCI state is ignored, absent, or not present;a field that indicates a TCI state is ignored, absent, or not present;a RS index in a TCI state is same as or associated with a RS index for a random access procedure; ora RS index in a TCI state is different from or not associated with a RS index for a random access procedure.7.The method of any of claims 1-6, wherein if a synchronization / physical broadcast channel (PBCH) signal block (SSB) is included in a TCI state, at least one of the following applies:a SSB index in a TCI state is same as or associated with a SSB index for a random access procedure;a SSB index associated with a SSB index in a TCI state is same as or associated with a SSB index for a random access procedure;a tracking reference signal (TRS) or a channel state information (CSI) reference signal (CSI-RS) associated with a SSB index in a TCI state is same as or associated with a SSB index for a random access procedure;a SSB index in a TCI state is same as or associated with a SSB index associated with a CSI-RS or a TRS for a random access procedure;a SSB index associated with a SSB index in a TCI state is same as or associated with a SSB index associated with a CSI-RS or a TRS for a random access procedure;a TRS or a CSI-RS associated with a SSB index in a TCI state is same as or associated with a SSB index associated with a CSI-RS or a TRS for a random access procedure;a SSB index in a TCI state is same as or associated with a CSI-RS or a TRS for a random access procedure;a SSB index associated with a SSB index in a TCI state is same as or associated with a CSI-RS or a TRS for a random access procedure; ora TRS or a CSI-RS associated with a SSB index in a TCI state is same as or associated with a CSI-RS or a TRS for a random access procedure.8.The method of any of claims 1-7, wherein if a tracking reference signal (TRS) or a channel state information (CSI) reference signal (CSI-RS) is included in a TCI state, at least one of the following applies:a synchronization / physical broadcast channel (PBCH) signal block (SSB) index associated with a TRS or a CSI-RS in a TCI state is same as or associated with a SSB index for a random access procedure;a TRS or a CSI-RS in a TCI state is same as or associated with a SSB index for a random access procedure;a SSB index associated with a TRS or a CSI-RS in a TCI state is same as or associated with a SSB index associated with a CSI-RS or a TRS for a random access procedure;a SSB index associated with a TRS or a CSI-RS in a TCI state is same as or associated with a CSI-RS or a TRS for a random access procedure;a TRS or a CSI-RS in a TCI state is same as or associated with a SSB index associated with a CSI-RS or a TRS for a random access procedure; ora TRS or a CSI-RS in a TCI state is same as or associated with a CSI-RS or a TRS for a random access procedure.9.The method of any of claims 1-8, wherein if a sounding reference signal (SRS) is included in a TCI state, at least one of the following applies:a synchronization / physical broadcast channel (PBCH) signal block (SSB) index associated with a SRS in a TCI state is same as or associated with a SSB index for a random access procedure;a SSB index associated with a SRS in a TCI state is same as or associated with a channel state information (CSI) reference signal (CSI-RS) or a tracking reference signal (TRS) for a random access procedure;a SSB index associated with a SRS in a TCI state is same as or associated with a SSB index associated with a CSI-RS or a TRS for a random access procedure;a SSB index associated with a SRS in a TCI state is same as or associated with a CSI-RS or a TRS associated with a SSB index for a random access procedure;a SRS in a TCI state is same as or associated with a SSB index for a random access procedure;a SRS in a TCI state is same as or associated with a CSI-RS or a TRS for a random access procedure;a SRS in a TCI state is same as or associated with a SSB index associated with a CSI-RS or a TRS for a random access procedure; ora SRS in a TCI state is same as or associated with a CSI-RS or a TRS associated with a SSB index for a random access procedure.10.The method of any of claims 1-9, wherein at least one of the following applies:the wireless device does not expect that a reference signal (RS) index in a TCI state is different from or not associated with a RS index for a random access procedure;the wireless device does not expect that a TCI state and a RS index for a random access procedure are present, included, or indicated in a cell switch command simultaneously or together;the wireless device does not expect that a RS index for a random access procedure is present, included, or indicated in a cell switch command;the wireless device does not expect that a TCI state is present, included, or indicated in a cell switch command;the wireless device expects that a RS index in a TCI state is same as or associated with a RS index for a random access procedure;the wireless device expects that a TCI state and a RS index for a random access procedure are present, included, or indicated in a cell switch command simultaneously or together;the wireless device expects that a RS index for a random access procedure is absent, ignored, not present, not included, or not indicated in a cell switch command; orthe wireless device expects that a TCI state is absent, ignored, not present, not included, or not indicated in a cell switch command.11.The method of any of claims 1-10, wherein at least one of the following applies:a TCI state in a cell switch command or a signaling of a cell switch command is used to receive or transmit information during a random access procedure;a reference signal (RS) index in a cell switch command or a signaling of a cell switch command is used to receive or transmit information during a random access procedure;a spatial domain filter corresponding to a TCI state in a cell switch command or a signaling of a cell switch command is used to receive or transmit information during a random access procedure;a spatial domain filter of a RS index in a cell switch command or a signaling of a cell switch command is used to receive or transmit information during a random access procedure;a quasi co location (QCL) assumption or parameter of a TCI state in a cell switch command or a signaling of a cell switch command is used to receive or transmit information during a random access procedure;a QCL assumption or parameter of a RS index in a cell switch command or a signaling of a cell switch command is used to receive or transmit information during a random access procedure;a QCL assumption or parameter of a RS index identified by the wireless device is used to receive or transmit information during a random access procedure;a TCI state or a RS index used to receive or transmit information during a random access procedure is based on a user equipment (UE) capability;a spatial domain filter corresponding to a TCI state or of a RS index used to receive or transmit information during a random access procedure is based on a UE capability; ora QCL assumption or parameter of a TCI state or a RS index used to receive or transmit information during a random access procedure is based on a UE capability.12.The method of any of claims 1-11, wherein at least one of the following applies:the wireless device applies a TCI state indicated in a cell switch command or a signaling of a cell switch command for receiving or transmitting information on a cell or a cell group;the wireless device applies a quasi co location (QCL) assumption or parameter of a TCI state indicated in a cell switch command or a signaling of a cell switch command for receiving or transmitting information on a cell or a cell group;the wireless device applies a spatial domain filter corresponding to a TCI state indicated in a cell switch command or a signaling of a cell switch command for receiving or transmitting information on a cell or a cell group;the wireless device applies a spatial domain filter used or identified during a random access procedure for receiving or transmitting information on a cell or a cell group;the wireless device applies a spatial domain filter that is same as that of a RS index for a random access procedure for receiving or transmitting information on a cell or a cell group;the wireless device applies a spatial domain filter corresponding to a RS included in a TCI state in a cell switch command or a signaling of a cell switch command for receiving or transmitting information on a cell or a cell group;the wireless device applies a spatial domain filter corresponding to a RS that is associated with a RS included in a TCI state in a cell switch command or a signaling of a cell switch command for receiving or transmitting information on a cell or a cell group; orthe wireless device applies a spatial domain filter that is same as at least one of a TCI state or a RS index for a random access procedure or identified during a random access procedure for receiving or transmitting information on a cell or a cell group.13.The method of any of claims 1-12, wherein a TCI state or a spatial domain filter corresponding to a TCI state or a reference signal (RS) index for a random access procedure is applied at a slot or symbol determined by at least one of the following:starting from a first slot or symbol that is at least T slots or symbols after a starting or ending slot or symbol of receiving a cell switch command or a signaling of a cell switch command that includes at least one of a TCI state or a RS index for a random access procedure;starting from a first slot or symbol that is at least T slots or symbols after a first or last slot or symbol of a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) with a hybrid automatic repeat request acknowledge (HARQ-ACK) information corresponding to a physical downlink shared channel (PDSCH) carrying a cell switch command or a signaling of a cell switch command that includes at least one of a TCI state or a RS index for a random access procedure;starting from a first slot or symbol that is at least T slots or symbols after a completion of a random access procedure;starting from a first slot or symbol that is after a completion of a random access procedure;starting from a first slot or symbol that is at least T slots or symbols after a completion of a TCI state being identified or known;starting from a first slot or symbol that is after a completion of a TCI state being identified or known;starting from a first slot or symbol that is after a completion of a cell switch;starting from a first slot or symbol that is after a cell switch delay;until a start of a slot or symbol of information transmission during a random access procedure; orstarting from an ending slot or symbol of a completion of a random access procedure.14.The method of claim 13, wherein a T value is determined based on at least one of the following: a user equipment (UE) capability, a radio resource control (RRC) signaling, a medium access control (MAC) control element (CE) signaling, a downlink control information (DCI) signaling, a pre-configuration, a time of a TCI state being known, a time for a UE processing, a time for a decoding and / or a checking of a RRC configuration of a cell, a time for an information transmission during a random access procedure, a time of a completion of a random access procedure, a time of a HARQ-ACK feedback corresponding to a PDSCH carrying a cell switch command or a signaling of a cell switch command.15.The method of claim 13 or 14, wherein a T value is at least one of the following: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 30, 40, 50, 60, 70, 80, 90, 100, or any combination or operation of the abovementioned values.16.The method of any of claims 1-15, wherein a TCI state in a cell switch command is applied starting from a first slot or symbol that is after a slot and wherein one or more parameters are defined as follows:n is a slot where a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH) with a hybrid automatic repeat request acknowledge (HARQ-ACK) information corresponds to a physical downlink shared channel (PDSCH) carrying a cell switch command or where a PDSCH carries a cell switch command or a signaling of a cell switch command;X is an integer equal to or greater than 0 or 1; andu is a subcarrier spacing (SCS) configuration of an information on a serving cell or a target cell, a SCS configuration of a PUCCH, a PUSCH, a PDSCH, a serving cell, a candidate cell, or a target cell, a smallest or greatest SCS configuration of a serving cell and a candidate cell or a target cell, or a smallest or greatest SCS configuration of a signal or a channel on a serving cell and a candidate cell or a target cell.17.The method of any of claims 1-16, wherein a TCI state in a cell switch command is applied starting from a first slot or symbol that is after a slot a slot or a slot and wherein one or more parameters are defined as follows:n is a slot containing a hybrid automatic repeat request acknowledge (HARQ-ACK) or an acknowledgement corresponding to a cell switch command or where a physical downlink shared channel (PDSCH) carries a cell switch command or a signaling of a cell switch command;μPDSCH is a subcarrier spacing (SCS) configuration of a PDSCH;μPUCCH or PUSCH is a SCS configuration of a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) ;μserving cell is a SCS configuration, a bandwidth part (BWP) , or a component carrier (CC) for a serving cell;μcandidate cell is a SCS configuration, a BWP, or a CC for a candidate cell;μtarget cell is a SCS configuration, a BWP, or a CC for a target cell;μ1 is a SCS configuration, a BWP, or a CC for a first cell, a first channel, or a first signal;μ2 is a SCS configuration, a BWP, or a CC for a second cell, a second channel, or a second signal;X is an offset relative to a slot or symbol where a HARQ-ACK or an acknowledgement corresponding to a cell switch command is transmitted or received or where a PDSCH carries a cell switch command; andu is a SCS configuration of an information on a serving cell or a target cell, a SCS configuration of a PUCCH, a PUSCH, a PDSCH, a serving cell, a candidate cell, or a target cell, a smallest or greatest SCS configuration of a serving cell and a candidate cell or a target cell, or a smallest or greatest SCS configuration of a signal or a channel on a serving cell and a candidate cell or a target cell.18.The method of any of claims 1-17, wherein a TCI state in a cell switch command is applied starting from a first slot or symbol that is after a slot and wherein one or more parameters are defined as follows:n is a slot containing a hybrid automatic repeat request acknowledge (HARQ-ACK) or an acknowledgement corresponding to a cell switch command or where a physical downlink shared channel (PDSCH) carries a cell switch command or a signaling of a cell switch command;X is an offset relative to a slot or symbol where a HARQ-ACK or acknowledgement corresponding to a cell switch command is transmitted or received or where a PDSCH carries a cell switch command;Z is a slot or frame offset between a serving cell and a candidate cell or a target cell; andu is a subcarrier spacing (SCS) configuration of an information on a serving cell or a target cell, a SCS configuration of a physical uplink control channel (PUCCH) , a physical uplink shared channel (PUSCH) , a PDSCH, a serving cell, a candidate cell, or a target cell, a smallest or greatest SCS configuration of a serving cell and a candidate cell or a target cell, or a smallest or greatest SCS configuration of a signal or a channel on a serving cell and a candidate cell or a target cell.19.The method of any of claims 1-18, wherein a TCI state in a cell switch command is applied starting from a first slot or symbol that is after a slot a slot or a slot and wherein one or more parameters are defined as follows:n is a slot containing a hybrid automatic repeat request acknowledge (HARQ-ACK) or an acknowledgement corresponding to a cell switch command or where a physical downlink shared channel (PDSCH) carries a cell switch command or a signaling of a cell switch command;μPDSCH is a subcarrier spacing (SCS) configuration of a PDSCH;μPUCCH or PUSCH is a SCS configuration of a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) ;μserving cell is a SCS configuration, a bandwidth part (BWP) , or a component carrier (CC) for a serving cell;μcandidate cell is a SCS configuration, a BWP, or a CC for a candidate cell;μtarget cell is a SCS configuration, a BWP, or a CC for a target cell;μ1 is a SCS configuration, a BWP, or a CC for a first cell, a first channel, or a first signal;μ2 is a SCS configuration, a BWP, or a CC for a second cell, a second channel, or a second signal;umax {PUCCH or PUSCH, PDSCH} is a maximum SCS of a SCS of a PUCCH or a PUSCH and a SCS of a PDSCH;umax {candidate cell, serving cell} is a maximum SCS configuration among SCSs of a serving cell and a candidate cell or a target cell;max {μ1, μ2} is a maximum SCS configuration, a maximum BWP configuration, or a maximum CC configuration among SCSs, BWPs, or CCs of a first cell and a second cell, a first channel and a second channel, or a first signal and a second signal;Z is a slot or frame offset between a serving cell and a candidate cell or a target cell;X is an offset relative to a slot or symbol where a HARQ-ACK or an acknowledgement corresponding to a cell switch command is transmitted or received or where a PDSCH carries a cell switch command; andu is a SCS configuration of an information on a serving cell or a target cell, a SCS configuration of a PUCCH, a PUSCH, a PDSCH, a serving cell, a candidate cell, or a target cell, a smallest or greatest SCS configuration of a serving cell and a candidate cell or a target cell, or a smallest or greatest SCS configuration of a signal or a channel on a serving cell and a candidate cell or a target cell.20.The method of any of claims 1-19, wherein a TCI state in a cell switch command is applied starting from a first slot or symbol that is at least X symbols or slots after a starting or an ending of a slot or a first or a last symbol of a physical uplink control channel (PUCCH) , a physical uplink shared channel (PUSCH) , or a physical downlink shared channel (PDSCH) carrying a cell switch command or a signaling of cell switch command, and wherein X is an offset relative to a slot or symbol where a hybrid automatic repeat request acknowledge (HARQ-ACK) or an acknowledgement corresponding to a cell switch command is transmitted or received or where a PDSCH carries a cell switch command.21.The method of any of claims 1-20, wherein a TCI state in a cell switch command is applied starting from a preamble transmission, a random access channel (RACH) occasion (RO) for a preamble or a MSG1 transmission, a slot of RO for a preamble or a MSG1 transmission, or a time when a random access procedure starts.22.The method of any of claims 1-21, wherein a TCI state in a cell switch command is applied until a time when the wireless device transits a first uplink (UL) signal or channel or receives a first downlink (DL) signal or channel to or from a target cell.23.The method of any of claims 1-22, wherein a TCI state in a cell switch command is applied starting from a first slot or symbol that is after a completing of a random access procedure.24.The method of any of claims 1-23, wherein a TCI state in a cell switch command is applied starting from a first slot or symbol that is after a slot n + X + Z, and wherein one or more parameters are defined as follows:n is a slot or a starting or an ending of a slot containing a hybrid automatic repeat request acknowledge (HARQ-ACK) or an acknowledgement corresponding to a cell switch command, a slot where a physical downlink shared channel (PDSCH) carries a cell switch command or a signaling of a cell switch command, or a first or a last symbol where a HARQ-ACK or an acknowledgement corresponding to a cell switch command is transmitted or received;X is an offset relative to a slot or symbol where a HARQ-ACK or an acknowledgement corresponding to a cell switch command is transmitted or received or where a PDSCH carries a cell switch command; andZ is a time including detecting or measuring a reference signal (RS) in a TCI state or a RS associated with a RS in a TCI state and / or processing a RS.25.The method of any of claims 1-24, wherein a TCI state in a cell switch command is applied starting from a first slot or symbol that is after a cell switch command or an information included in a cell switch command is received, parsed, decoded, and / or processed.26.The method of any of claims 1-25, wherein the information transmitted or received comprises at least one of the following: a channel state information (CSI) reference signal (CSI-RS) , a synchronization / physical broadcast channel (PBCH) signal block (SSB) , a sounding reference signal (SRS) , a demodulation reference signal (DMRS) , a tracking reference signal (TRS) , a physical uplink shared channel (PUSCH) , a physical downlink shared channel (PDSCH) , a physical uplink control channel (PUCCH) , a physical downlink control channel (PDCCH) , a control resource set (CORESET) , a MSG1, a MSG2, a MSG3, a MSG4, a MSG A, a MSG B, a data, a physical random access channel (PRACH) , a random access response (RAR) , a random access channel (RACH) occasion (RO) , or a scheduling request (SR) .27.An apparatus for wireless communication, comprising a processor, wherein the processor is configured to implement a method recited in any one or more of claims 1 to 26.28.A computer readable program storage medium having code stored thereon, the code, when executed by a processor, causing the processor to implement a method recited in any one or more of claims 1 to 26.
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