Timing Adjustment Techniques for Uplink Transmissions

Abstract

In response to receiving the at least one reference signal, a start time of the second radio time unit is based on the at least one timing value of the at least one radio time unit and the timing advance related information.

Description

[Technical Field]

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

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

[0003] Long Term Evolution (LTE) is a wireless communication standard for mobile devices and data terminals developed by the 3rd Generation Partnership Project (3GPP®). LTE Advanced (LTE-A) is a wireless communication standard that enhances the LTE standard. The fifth generation of wireless systems, known as 5G, promises to evolve the LTE and LTE-A wireless standards and support higher data rates, a larger number of connections, ultra-low latency, high reliability, and other emerging business needs. Summary of the Invention [Means for solving the problem]

[0004] Techniques for adjusting timing for uplink transmissions are disclosed.

[0005] A first exemplary wireless communication method includes receiving, by a communication device, at least one reference signal in at least one radio time unit and a timing advance adjustment message, where the timing advance adjustment message indicates timing advance related information; and transmitting an uplink transmission in a second radio time unit in response to receiving the at least one reference signal, where a start time of the second radio time unit is based on at least one timing value of the at least one radio time unit and the timing advance related information.

[0006] In some embodiments, the start time of the second radio time unit is obtained by advancing the second radio time unit using a timing advance value indicated by the timing advance-related information. In some embodiments, the timing advance adjustment message is associated with transmission parameters that are the same as those associated with at least one reference signal. In some embodiments, at least one timing value of the at least one radio time unit is associated with a transmission parameter that is different from another transmission parameter of another timing value of another radio time unit in which the reference signal is received. In some embodiments, the transmission parameters include one or more reference signals, a reference signal resource set, a physical uplink control channel (PUCCH) resource set, panel-related information, a subarray, an antenna group, an antenna port group, a group of antenna ports, a beam group, a beam state, a candidate cell, a candidate cell list, a physical cell index (PCI), a time alignment group (TAG), TRP-related information, a CORESET pool index, a set of power control parameters, an index of a TCI state within a TCI state code point, a wireless communication device capability value, or information grouping wireless communication device capability sets.

[0007] In some embodiments, the at least one radio time unit includes at least one radio frame, and the second radio time unit includes a second radio frame. In some embodiments, the method further includes receiving information indicating a plurality of time alignment groups (TAGs) or a plurality of TAG indices and a plurality of transmission parameters, wherein the plurality of TAGs or the plurality of TAG indices are associated with the plurality of transmission parameters based on an order in which the plurality of TAGs or the plurality of TAG indices are indicated in the information. In some embodiments, the method further includes receiving information indicating a plurality of time alignment groups (TAGs) or a plurality of TAG indices and a plurality of transmission parameters, wherein the plurality of TAGs or the plurality of TAG indices are associated with the plurality of transmission parameters based on index values ​​of the plurality of TAGs or the plurality of TAG indices. In some embodiments, transmission of an uplink transmission is scheduled or configured for the communication device, wherein the transmission of the uplink transmission is not associated with transmission parameters, and the association between the transmission of the uplink transmission and default transmission parameters is based on a default rule or a message from the network device.

[0008] In some embodiments, the start time for transmission of the uplink transmission is based on (1) timing advance-related information, (2) at least one reference signal, and / or (3) at least one timing value associated with default transmission parameters. In some embodiments, the default transmission parameters indicated by a message from the network device or determined by default rules include any one or more of the following: a lowest CORESETPoolIndex value, a highest CORESETPoolIndex value, a time alignment group (TAG) with a lowest or highest TAG ID, a transmission configuration indicator (TCI) state associated with a lowest or highest TAG-ID, a transmission reception point (TRP)-related indication with a lowest or highest value, pre-configured transmission parameters, and / or a particular physical cell ID (PCI). In some embodiments, in response to the uplink transmission and the second uplink transmission overlapping in the time domain and / or the frequency domain, the uplink transmission is associated with a first transmission parameter and the second uplink transmission is associated with a second transmission parameter, the uplink transmission and the second uplink transmission are scheduled or configured for transmission using the first transmission parameter, the second transmission parameter is pre-configured or indicated by the network device, and the first transmission parameter is different from the second transmission parameter.

[0009] In some embodiments, the first transmission parameter or the second transmission parameter includes a sounding reference signal (SRS) resource set. In some embodiments, the uplink transmission and the second uplink transmission overlap in the time domain in response to different timing advance values ​​being applied to the uplink transmission and the second uplink transmission. In some embodiments, the method further includes determining, by the communications device, not to transmit the second uplink transmission associated with the second timing advance value within the time gap. In some embodiments, the time gap starts from an end of the uplink transmission associated with the first timing advance value or starts from an end of the radio frame associated with the first timing advance value. In some embodiments, the time gap is determined based on any one or more of a predetermined value set, a predetermined table, a predetermined default rule, or a message including at least one of a number of symbols, an index of the predetermined value set, or an index of an entry in the predetermined table.

[0010] In some embodiments, the method further includes performing, by the communications device, an operation in response to expiration of a timer associated with a Time Alignment Group (TAG). In some embodiments, performing the operation includes suspending all uplink transmissions except for a Physical Random Access Channel (PRACH) associated with all TAGs and maintaining timing advance values ​​for all TAGs in response to expiration of a timer associated with any of a plurality of Primary TAGs (PTAGs). In some embodiments, performing the operation includes suspending all uplink transmissions except for a Physical Random Access Channel (PRACH) associated with all TAGs and maintaining timing advance values ​​for all TAGs in response to expiration of a timer associated with a TAG having a particular TAG index. In some embodiments, the particular TAG index is zero or a particular TAG index value associated with a TAG that includes an SPCell. In some embodiments, the timer includes a Time Alignment Timer (TAT). In some embodiments, the at least one reference signal includes at least one downlink reference signal.

[0011] A second exemplary wireless communication method includes transmitting, by a network device, at least one reference signal in at least one radio time unit and a timing advance adjustment message, where the timing advance adjustment message indicates timing advance related information; and receiving an uplink transmission in a second radio time unit in response to transmitting the at least one reference signal, where a start time of the second radio time unit is based on at least one timing value of the at least one radio time unit and the timing advance related information.

[0012] In some embodiments, the second radio time unit is advanced using a timing advance value indicated by the timing advance-related information to obtain a start time of the second radio time unit. In some embodiments, the timing advance adjustment message is associated with transmission parameters that are the same as those associated with at least one reference signal. In some embodiments, at least one timing value of the at least one radio time unit is associated with a transmission parameter that is different from another transmission parameter of another timing value of another radio time unit in which the reference signal is received. In some embodiments, the transmission parameters include one or more reference signals, a reference signal resource set, a physical uplink control channel (PUCCH) resource set, panel-related information, a subarray, an antenna group, an antenna port group, a group of antenna ports, a beam group, a beam state, a candidate cell, a candidate cell list, a physical cell index (PCI), a time alignment group (TAG), TRP-related information, a CORESET pool index, a set of power control parameters, an index of a TCI state within a TCI state code point, a wireless communication device capability value, or information grouping wireless communication device capability sets.

[0013] In some embodiments, the at least one radio time unit includes at least one radio frame, and the second radio time unit includes a second radio frame. In some embodiments, the method further includes transmitting information indicating a plurality of time alignment groups (TAGs) or a plurality of TAG indices and a plurality of transmission parameters, wherein the plurality of TAGs or the plurality of TAG indices are associated with the plurality of transmission parameters based on an order in which the plurality of TAGs or the plurality of TAG indices are indicated in the information. In some embodiments, the method further includes transmitting information indicating a plurality of time alignment groups (TAGs) or a plurality of TAG indices and a plurality of transmission parameters, wherein the plurality of TAGs or the plurality of TAG indices are associated with the plurality of transmission parameters based on index values ​​of the plurality of TAGs or the plurality of TAG indices.

[0014] In some embodiments, transmission of the uplink transmission is scheduled by or configured for the communication device, the transmission of the uplink transmission is not associated with transmission parameters, and the association between the transmission of the uplink transmission and the transmission parameters is based on a default rule or a message from the network device. In some embodiments, a start time for transmission of the uplink transmission is based on (1) timing advance-related information, (2) at least one reference signal, and / or (3) at least one timing value associated with the default transmission parameters. In some embodiments, the default transmission parameters indicated by the message from the network device or determined by the default rule include any one or more of the following: a lowest CORESETPoolIndex value, a highest CORESETPoolIndex value, a time alignment group (TAG) with a lowest or highest TAG ID, a transmission configuration indicator (TCI) state associated with a lowest or highest TAG-ID, a transmission reception point (TRP)-related indication with a lowest or highest value, a pre-configured value, and / or a specific physical cell ID (PCI).

[0015] In some embodiments, the method further includes determining, by the network device, not to schedule a second uplink transmission associated with the second timing advance value within the time gap. In some embodiments, the time gap starts from an end of the uplink transmission associated with the first timing advance value or starts from an end of the radio frame associated with the first timing advance value. In some embodiments, the time gap is determined based on any one or more of a predetermined value set, a predetermined table, a predetermined default rule, or a message including at least one of a number of symbols, an index of the predetermined value set, or an index of an entry in a predetermined table. In some embodiments, the at least one reference signal includes at least one downlink reference signal.

[0016] In yet another exemplary aspect, the methods described above are embodied in the form of processor-executable code and stored in a non-transitory computer-readable storage medium, the code contained in the computer-readable storage medium, when executed by a processor, causing the processor to perform the methods described in this patent document.

[0017] In yet another exemplary embodiment, a device configured or operable to perform the above-described method is disclosed.

[0018] These and other aspects and their implementations are described in more detail in the drawings, description, and claims. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 illustrates inter-cell or transmission reception point (TRP) uplink transmissions from multiple user equipments (UEs).

[0020] [Figure 2]FIG. 2 shows adjacent frames that overlap due to applying different timing advances (TA).

[0021] [Figure 3] FIG. 3 illustrates an embodiment of downlink and uplink timing determination.

[0022] [Figure 4] FIG. 4 shows an example of two downlink and uplink timing determinations.

[0023] [Figure 5] FIG. 5 illustrates an exemplary association between uplink transmissions and time alignment groups (TAGs).

[0024] [Figure 6] FIG. 6 illustrates an example of a wireless communication system including a base station (BS) and user equipment (UE) in accordance with some implementations of the disclosed technology.

[0025] [Figure 7] FIG. 7 shows an exemplary block diagram of a hardware platform that may be part of a network or communication device.

[0026] [Figure 8] FIG. 8 shows an exemplary flowchart for transmitting an uplink transmission.

[0027] [Figure 9] FIG. 9 shows an exemplary flowchart for receiving an uplink transmission. DETAILED DESCRIPTION OF THE INVENTION

[0028] Detailed Description Multiple Transmit Receiving Point (MTRP) transmission technology has been developed with advancements, and multiple TRPs can be realized by multiple base stations or multiple antenna panels of one base station. Uplink time alignment technology can ensure that the arrival timing of transmissions from multiple user equipments (UEs) is within an acceptable range, enabling reliable demodulation at the network side. Uplink time alignment can require the UE to adjust the transmission timing of its uplink transmissions to be earlier than the reference downlink timing, and individual reference downlink timing for each TRP / Cell may be required when a unified downlink reference timing cannot meet certain requirements.

[0029] The UE may receive a Timing Advance Command (TAC) corresponding to a Time Alignment Group (TAG) index, and the UE will determine the uplink transmission timing of the uplink transmission associated with the TAG based on the received TAC. The association between different uplink transmissions and their corresponding TAGs may vary due to scheduling schemes, configurations, etc.

[0030] With the development of UEs, some UEs with higher capabilities have multiple panels and multiple RF links. Therefore, it may be possible for a UE to transmit uplink transmissions through multiple panels at the same time. A UE that transmits more than one uplink signal / channel through multiple panels at the same time may be referred to as simultaneous transmission across multiple panels (ST×MP). When a timing advance timeline is associated with a TRP, two uplink transmissions associated with different TRPs may overlap in the time domain due to different timing advances. Due to the shortened slot duration, a UE with ST×MP capability may be enabled to transmit both uplink transmissions rather than aborting one of them.

[0031] The example headings for the various sections below are used to facilitate understanding of the disclosed subject matter and do not limit the scope of the claimed subject matter in any way. Thus, one or more features of one example section can be combined with one or more features of another example section. Furthermore, although 5G terminology is used for clarity of explanation, the techniques disclosed herein are not limited to only 5G technology and may also be used in wireless systems implementing other protocols.

[0032] I. Introduction

[0033] Downlink and uplink synchronization are necessary steps to ensure reliable wireless communication in LTE and NR wireless systems. Downlink synchronization is achieved by receiving a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS), and uplink synchronization is achieved by a random access procedure and uplink timing alignment maintenance.

[0034] Figure 1 shows inter-cell / TRP uplink transmissions from multiple UEs. As shown in Figure 1, different geographic locations of the base station or different physical orientations of the panel may result in different transmission delays for all uplink and downlink signals. Uplink synchronization is to ensure that the arrival times of uplink signals from various UEs can be within the cyclic preamble of a downlink subframe / slot / subslot, and it can be seen that the uplink signals from the UEs are approximately aligned with each other.

[0035] The value of the uplink transmission timing advance is determined by RRC signaling and the Timing Advance Command (TAC) contained within the MAC CE. TA,offsetTypically, a network configures multiple time alignment groups (TAGs) to indicate timing advances for multiple serving cells, with each TAG containing one or more serving cells. A base station transmits a TAC associated with the TAG, and a UE applies the TAC to determine timing advances for all serving cells within the TAG. TA,offset For , the UE expects the same value to be configured for serving cells within the same TAG.

[0036] For m-TRP, the UE transmits signals to TRPs in the same serving cell and can obtain associations between the TRPs and signals based on CORESETPoolIndex, PCI, or other information. For configured grant-based PUSCH transmission, periodic PUCCH transmission, or sounding reference signal transmission, the UE transmits the corresponding signals based on configured transmission information, e.g., time / frequency domain location and periodicity, which means that the uplink signals are not associated with DCI or CORESETPoolIndex. The association between SRS / CG-PUSCH / P-PUCCH and TRPs can only be obtained by RRC messages, e.g., associated TCI status, associated reference signal, or explicit information element.

[0037] When a UE receives two TACs and determines two uplink transmission timelines, two uplink transmissions scheduled to be non-overlapping may be transmitted by the UE in an overlapped manner in the time domain. As shown in Figure 2, two uplink transmissions are respectively applied with TA1 and TA2 and overlap in the time domain, and simultaneous uplink transmissions can be operated to avoid canceling one of the overlapped uplink transmissions. Figure 2 shows adjacent frames that overlap due to the application of different TAs.

[0038] In this patent document, the term "transmission parameter" includes any one or more of a transmission reception point (TRP), a physical cell, a base station, or a set of panels of one base station. Furthermore, a TRP may include any one or more of "information grouping one or more reference signals," "resource set," "panel," "sub-array," "antenna group," "antenna port group," "group of antenna ports," "beam group," "physical cell index (PCI)," "TRP related indication index," "CORESET pool index," "candidate cell," "candidate cell list," "UE capability value," or "UE capability set."

[0039] In this patent document, the term "TRP indication" includes any one or more of a CORESET index, a CORESET pool index, an SS / PBCH block index, a transmission configuration indicator (TCI) state index, a PCI, an RS set index, an SRS resource set index, a spatial relationship index, a power control parameter set index, a panel index, a beam group index, a subarray index, an index of a CDM group of a DMRS port, a group index of a CSI-RS resource, a CMR set index, a candidate cell index, or a candidate cell list index.

[0040] In this patent document, the term "TCI state" includes any one or more of a TCI state for the downlink, a TCI state for the uplink, or a TCI state for both the uplink and downlink. In this patent document, the term "uplink signal" can be a PUCCH, a PUSCH, an SRS, or a PRACH. In this patent document, the term "uplink transmission" can be a transmission opportunity for an uplink signal, a repetition of an uplink signal, or an uplink signal. In this patent document, the term "downlink reference signal" can be a path loss RS, a CSI RS, or an SSB. In this patent document, the term "slot" is equivalent to a subslot, a frame, or a subframe. In this patent document, the term "Uplink Control Information (UCI)" includes HARQ-ACK information, an SR, an LRR, or a CSI. In this patent document, the term "Time Alignment Group (TAG)" may include one or more serving cells or one or more serving cells associated with at least one transmission parameter. In this patent document, a timing advance adjustment message includes any one or more of the following: a TAG index, a timing advance command, a reference timing advance command, a timing advance offset, or a timing advance offset of a transmission parameter.

[0041] Several approaches or techniques for adjusting uplink transmission times are considered in the following exemplary aspects. Aspect (1): A UE receives at least one downlink reference signal and at least one timing advance adjustment message from a base station; the UE determines at least one downlink reference timing based on the reception of the downlink reference signal; and the UE determines a transmission timing of an uplink transmission to be advanced from the downlink reference timing; the amount of advance is determined based on a timing advance adjustment message; The timing advance adjustment message includes any one or more of the following: a TAG index, a timing advance command, a reference timing advance command, a timing advance offset, or a timing advance offset of the transmitted information; The downlink reference signal includes any one or more of the following: a path loss reference signal, a CSI-reference signal, or an SSB; The transmission parameters include any one or more of the following: TRP, cell, TRP indication, TRP related information, cell related information, TAG, TCI status indicated by MAC CE, TCI status indicated by PDCCH, etc. The uplink transmission includes any one or more of an uplink signal transmission opportunity, a repetition of an uplink signal, or an uplink signal, the uplink signal including a PUCCH, a PUSCH, an SRS, or a PRACH; and / or The timing advance adjustment message, the downlink reference signal, and the downlink reference timing are associated with corresponding transmission parameters.

[0042] Details relating to aspect (1) are further described in Exemplary Embodiment 1 within this patent document. Aspect (2): The UE receives an information element including at least one time alignment group index (TAG-ID), and the UE determines the association between the TAG index and the transmission parameters based on the position of the TAG-ID within the information element, the ascending / descending order of the TAG-ID, or explicit signaling within the information element.

[0043] Details relating to aspect (2) are further described in Exemplary Embodiment 2 within this patent document. Aspect (3): The UE is scheduled or configured for uplink transmission that is not associated with a transmission parameter; the UE determines a transmission timing for the uplink transmission based on (a) the timing advance adjustment message, (b) the downlink reference signal, and / or (c) a downlink reference timing associated with default transmission parameters; and / or The default transmission parameters include any one or more of the following: minimum / maximum CORESETPoolIndex values, TAGs with minimum / maximum TAG-IDs, TCI states associated with the minimum / maximum TAG-IDs, TRP indications with minimum / maximum values, pre-configured transmission parameters, or specific transmission parameters.

[0044] Details relating to aspect (3) are further described in Exemplary Embodiment 3 within this patent document. Aspect (4): The UE is scheduled or configured for first and second transmissions associated with the first transmission parameters; The UE determines transmission timings of the first and second transmissions based on the corresponding timing advance adjustment messages, and then the two transmissions are overlapped in the time domain; The UE determines to transmit a first transmission associated with a first transmission parameter, where the association between the first transmission and the first transmission parameter may be configured or scheduled; the UE determines to transmit a second transmission associated with second transmission parameters; and / or The second transmission parameters are pre-configured or indicated by the base station.

[0045] Details relating to aspect (4) are further described in Exemplary Embodiment 4 within this patent document. Aspect (5): The UE is configured with at least one TAG and at least one time alignment timer (TAT) for each TAG; The UE determines to discontinue uplink transmission associated with at least the corresponding TAG upon expiration of the TAT; The UE determines to discontinue uplink transmissions associated with all configured TAGs upon expiration of a TAT associated with a particular TAG; Aborting uplink transmission includes flushing HARQ buffers, releasing configured PUCCH / SRS, clearing configured downlink assignments, clearing configured uplink grants, or clearing PUSCH resources for semi-persistent CSI reporting.

[0046] Details relating to aspect (5) are further described in Exemplary Embodiment 5 within this patent document.

[0047] II. Exemplary Embodiment 1

[0048] Exemplary embodiment 1 describes a technique for determining at least one downlink reference timing (e.g., one or more start times of one or more downlink frames) associated with corresponding transmission parameters based on a received downlink reference signal (e.g., within one or more downlink frames), and using one of the at least one downlink reference timing to determine an uplink transmission timing of an uplink transmission.

[0049] In some embodiments, the timing advance adjustment message is associated with at least one TCI state, one TCI state group, or one TCI state pool, and at least one downlink reference signal is associated with a TCI state, a TCI state group, or a TCI state pool.

[0050] In some embodiments, the timing advance adjustment message and the at least one downlink reference signal are associated with the same transmission parameters. In some embodiments, each downlink reference timing is associated with a different transmission parameter. In some embodiments, the transmission parameters may include TRP-related information or cell-related information.

[0051] In some embodiments, the UE receives a downlink reference signal and determines a corresponding downlink timing, and the UE further determines the downlink timing of a downlink frame (e.g., the start time of downlink frame i in FIG. 3). The UE determines the transmission timing of an uplink transmission (e.g., the start time of uplink frame i+2 in FIG. 3) based on the downlink timing of the downlink frame and the timing advance adjustment message.

[0052] In one embodiment, an uplink transmission associated with a downlink reference signal is to be transmitted within an uplink frame, and the UE determines the transmission timing of the uplink frame to be advanced from the downlink frame timing by an amount determined by a corresponding timing advance adjustment message.

[0053] In one embodiment, the uplink transmission is indicated / configured to use the downlink reference signal as the path loss RS. In another embodiment, the QCL type information of the uplink transmission and the downlink reference signal is Type A or Type C. In another embodiment, the uplink transmission is indicated / configured with spatial relationship information associated with the downlink reference signal.

[0054] In one embodiment, the UE receives the downlink reference signal and determines the corresponding downlink timing. The UE determines the transmission timing of the uplink transmission based on the downlink timing, the timing advance adjustment message, and the plurality of time-domain transmission parameters.

[0055] In one embodiment, the time domain transmission parameters include a start symbol and length indication, a system frame number, an SCS, or a slot index.

[0056] 3 illustrates an example of downlink and uplink timing determination. In the example illustrated in FIG. 3, a UE receives a downlink reference signal and determines corresponding downlink timing of one or more downlink frames. The UE further determines uplink transmission timing of an uplink transmission associated with the downlink reference signal, where the timing advance amount is determined based on a corresponding timing advance adjustment message.

[0057] 4 illustrates an example of two downlink and uplink timing determinations. In the example illustrated in FIG. 4, a UE receives a first downlink reference signal and determines corresponding downlink timing of one or more downlink frames, and further receives a second downlink reference signal and determines corresponding downlink timing of one or more downlink frames. The UE further determines uplink transmission timing of an uplink transmission based on the timing of the downlink frame determined by a corresponding timing advance adjustment message and the associated downlink reference signal.

[0058] III. Exemplary Embodiment 2

[0059] Exemplary embodiment 2 describes a technique for determining the association between a TAG index and a transmission parameter.

[0060] In some embodiments, the UE is configured with more than one TAG or TAG index for the serving cell in an information element received by the UE.

[0061] In one embodiment, the UE associates a first TAG / TAG index with a first transmission parameter and associates a second TAG / TAG index with a second transmission parameter.

[0062] In one embodiment, the UE associates a first transmission parameter with a TAG having a lower TAG index value and associates a second transmission parameter with a TAG having a higher TAG index value.

[0063] In one embodiment, the UE associates the TAG / TAG index with the transmission parameters according to an explicit indication / configuration in the information element, e.g., a field described as TAG-Id is associated with a first transmission parameter and a field described as TAG-Id-additional is associated with a second transmission parameter.

[0064] In the above embodiment, the first transmission information may be a CORESETPoolIndex value of 0, a physical cell index configured in ServingCellConfigCommon, or a reference signal group index associated with the CORESETPoolIndex value of 0, and the second transmission information may be a CORESETPoolIndex value of 1, an additional physical cell index, or a reference signal group index associated with the CORESETPoolIndex value of 1.

[0065] In some embodiments, a UE is configured with more than one TAG associated with at least one serving cell configuration.

[0066] In some embodiments, the TAG associated with the SPCell has the lowest TAG index among all configured TAGs. In one example, only one TAG is associated with the SPCell, and its TAG index is 0. In one example, two TAGs are associated with the SPCell, and their TAG indexes are 0 and 1, respectively.

[0067] In some embodiments, the TAG index of one of the TAGs associated with the SPCell is 0.

[0068] In some embodiments, the TAG index of the TAG associated with a particular transmission parameter is 0, and the particular transmission parameter includes a CORESETPoolIndex value of 0, a TCI state associated with the CORESETPoolIndex value of 0, or a downlink reference signal group associated with CORESETPoolIndex0.

[0069] In some embodiments, the TAG with TAG index 0 is the primary TAG (PTAG).

[0070] In some embodiments, the TAG associated with the SPCell is a PTAG.

[0071] In this embodiment, the UE determines the transmission timing of the uplink transmission associated with the transmission parameters based on the timing advance adjustment message associated with the corresponding TAG / TAG index.

[0072] IV. Exemplary Embodiment 3

[0073] Exemplary embodiment 3 describes a technique for determining the association between a TAG index and an uplink transmission that is not associated with a transmission parameter based on a default rule or a message from the network.

[0074] In some embodiments, uplink transmissions are associated with no transmission parameters or, in general, with more than one transmission parameter.

[0075] In one embodiment, for uplink transmission resource sets that are typically configured without association with specific transmission parameters, the UE determines to associate a default TAG / TAG index with the uplink transmission resource set.

[0076] In one embodiment, for uplink transmissions that are configured to be transmitted periodically and that are not associated with specific transmission parameters, the UE determines to associate a default TAG / TAG index with the uplink transmission.

[0077] In the above examples, the default TAG / TAG index is a TAG / TAG index associated with a particular CORESETPoolIndex value, a physical cell index configured in ServingCellConfigCommon, a reference signal group index associated with a particular transmission parameter, or a TCI state associated with a particular transmission parameter.

[0078] In some embodiments, a TCI state indication MAC CE is used to indicate to the UE at least one TCI state index to be associated with at least one uplink transmission.

[0079] In one embodiment, the TCI state indication MAC CE consists of any one or more of the following fields: serving cell index, PCI, DL BWP index, UL BWP index, TCI state index, or TCI state type indication. The TCI state type can be a downlink TCI state, an uplink TCI state, or a joint TCI state.

[0080] In one embodiment, the UE receives the TCI state indication MAC CE and determines an association between the uplink transmission and the indicated TCI state.

[0081] In an embodiment, the at least one uplink transmission is not associated with a TCI state, further associated with a TAG / TAG index prior to receipt of the TCI state indication MAC CE.

[0082] 5 illustrates an exemplary association between uplink transmissions and TAGs. In the example illustrated in FIG. 5, for most uplink transmissions, the UE can determine the association between the uplink transmission and a TAG based on its configuration or indicated transmission parameters. For some uplink transmissions that are not associated with transmission parameters to indicate the association to the UE, the UE can determine the association based on a rule (e.g., a preconfigured default TAG) or a network message (e.g., a specific TCI status indication MAC CE).

[0083] V. Exemplary Embodiment 4

[0084] Exemplary embodiment 4 describes a technique for addressing the overlapping problem when applying different timing advance values ​​in a manner of simultaneous uplink transmission operation.

[0085] In the embodiments below, the UE is capable of simultaneous uplink transmission, and that operation is enabled, enabled, or indicated, where applicable.

[0086] In some embodiments, the UE simultaneously transmits more than one uplink transmission over multiple panel-related information, including antenna port groups, antenna panels, antenna panel groups, beam groups, or TCI states.

[0087] In some embodiments, the UE is scheduled or configured with first and second uplink transmissions, the two uplink transmissions overlapping in the time domain due to applying different timing advance adjustment values.

[0088] In one embodiment, the two uplink transmissions are associated with different panel-related information, and the UE transmits each of the two uplink transmissions based on the corresponding panel-related information, and does not shorten the transmission duration of any of the uplink transmissions or cancel any of the uplink transmissions.

[0089] In one embodiment, two uplink transmissions are associated with the same panel-related information. The UE transmits a first uplink transmission based on the associated panel-related information and transmits a second uplink transmission based on the panel-related information configured / indicated by the network. The UE does not shorten the transmission duration of either of the uplink transmissions or cancel any of the uplink transmissions.

[0090] In one embodiment, the network configures / indicates at least one panel-related information to be used in the case of simultaneous uplink transmission operation. When the indication or configuration is present, the UE can transmit uplink transmissions based on the indicated / configured panel-related information rather than the associated panel-related information. When the indication or configuration is absent, the UE transmits uplink transmissions based on the associated panel-related information.

[0091] In one embodiment, the UE decides to discontinue the first or second uplink transmission and reports a message to inform the base station that a simultaneous uplink transmission is required.

[0092] In one embodiment, the UE determines to shorten the transmission duration of the first or second uplink transmission and reports a message to inform the base station that simultaneous uplink transmission is required.

[0093] In one embodiment, after transmitting a report message carrying a simultaneous uplink transmission requirement, the UE may be indicated / enabled / configured to transmit two uplink transmissions based on different panel-related information.

[0094] In the above embodiment, the shortened transmission duration is at least equal to the length of the overlapped portion of the two uplink transmissions.

[0095] In some embodiments, the UE does not expect to transmit an uplink transmission associated with the first timing advance adjustment value within a time gap starting from the end of an uplink transmission associated with the second timing advance adjustment value.

[0096] In some embodiments, the UE does not expect to transmit an uplink transmission associated with the first timing advance adjustment value within a time gap starting from the end of the uplink frame associated with the second timing advance adjustment value.

[0097] In some embodiments, the time gap is determined based on a message including at least one of a predetermined value set (including multiple time gap values), a predetermined table, a predetermined default rule (e.g., several predetermined time gap values ​​to be used in certain conditions), or several symbols, an index of a predetermined value set, or an index of an entry in a predetermined table.

[0098] In some embodiments, the UE ignores the time gap when simultaneous uplink transmission is enabled / enabled / indicated. In such embodiments, the UE can perform the first and second uplink transmissions without having a time gap between the two transmissions.

[0099] In some embodiments, the UE is enabled / enabled / indicated for simultaneous uplink transmission. For uplink transmissions associated with different TAs but associated with the same transmission parameters (e.g., SRS resource set), the above time gap should be maintained. For uplink transmissions associated with different transmission parameters (e.g., SRS resource set), the time gap can be ignored.

[0100] VI. Exemplary Embodiment 5

[0101] Exemplary embodiment 5 describes a technique for specifying the behavior of a UE when a time alignment timer (TAT) associated with a TAG expires.

[0102] In some embodiments, the TAT associated with a TAG will start or restart when a timing advance adjustment message associated with the TAG is received by the UE, and the TAT expiration is equal to the gap between the current timing and the received timing of the last timing advance adjustment message exceeding the TAT.

[0103] In some embodiments, ceasing uplink transmission in response to expiration of the TAT timer includes flushing HARQ buffers, releasing configured PUCCH / SRS, clearing configured downlink assignments, clearing configured uplink grants, or clearing PUSCH resources for semi-persistent CSI reporting.

[0104] In some embodiments, when the TAT associated with only one PTAG expires, the UE ceases all uplink transmissions associated with all TAGs and maintains the timing advance adjustment values ​​of all TAGs.

[0105] In some embodiments, when the TAT associated with any of the PTAGs expires, the UE ceases all uplink transmissions associated with all TAGs and maintains the timing advance values ​​of all TAGs.

[0106] In some embodiments, when a TAT associated with a PTAG having a particular TAG index expires, the UE ceases all uplink transmissions associated with all TAGs and maintains the timing advance values ​​of all TAGs.

[0107] In some embodiments, when a TAT associated with a PTAG that does not have a particular TAG index expires, the UE ceases all uplink transmissions associated with that TAG and maintains the timing advance value of that TAG.

[0108] In some embodiments, when a TAT associated with a PTAG that does not have a particular TAG index expires, the UE ceases all uplink transmissions associated with that TAG and maintains the timing advance value of that TAG.

[0109] In some embodiments, when the TAT associated with a STAG having a particular TAG index expires, the UE ceases all uplink transmissions associated with all TAGs and maintains the timing advance values ​​of all TAGs.

[0110] In some embodiments, when the TAT associated with any of the STAGs expires, the UE ceases all uplink transmissions associated with that TAG and maintains the timing advance value of that TAG.

[0111] In the above embodiment, the particular TAG index may be a TAG index value of 0 or a TAG index value associated with the TAG that includes the SPCell.

[0112] In some embodiments, when a TAT associated with a TAG expires, the TAG includes at least one serving cell configured with more than one TAG, and at least one TAT associated with these TAGs does not expire, the UE determines the uplink transmission timing associated with the TAG based on a timing advance adjustment message associated with one of the TAGs whose TAT does not expire, and maintains the timing advance value of the TAG.

[0113] In the above embodiment, maintaining the timing advance value includes determining the uplink transmission timing based on the received timing advance adjustment message.

[0114] This patent document describes exemplary techniques for adjusting transmission timing of uplink signals / channels when multiple downlink / uplink timings are applied. Thus, exemplary techniques are described to describe downlink / uplink timing according to reception of downlink reference signals, association between uplink transmissions and downlink reference signals, association between TAG index and uplink transmissions, and simultaneous uplink transmission operation in case of overlap between uplink transmissions.

[0115] Implementations such as those discussed above would be applied to wireless communications. Figure 6 shows an example of a wireless communication system (e.g., a 5G or NR cellular network) including a base station 620 and one or more user equipments (UEs) 611, 612, and 613. In some embodiments, the UE accesses a BS (e.g., a network) using a communication link to the network (depicted by dashed arrows 631, 632, 633, sometimes referred to as the uplink direction), which then enables subsequent communication from the BS to the UE (e.g., shown in the network-to-UE direction, sometimes referred to as the downlink direction, as depicted by arrows 641, 642, 643). In some embodiments, the BS transmits information to the UE (depicted by arrows 641, 642, 643, sometimes referred to as the downlink direction), which then enables subsequent communication from the UE to the BS (e.g., shown in the UE-to-BS direction, sometimes referred to as the uplink direction, as depicted by dashed arrows 631, 632, 633). 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 the like.

[0116] FIG. 7 shows an example block diagram of a hardware platform 700, which may be part of a network device (e.g., a base station) or a communication device (e.g., user equipment (UE)). The hardware platform 700 includes at least one processor 710 and a memory 705 having instructions stored thereon. The instructions, upon execution by the processor, configure the hardware platform 500 to perform the operations described in FIGS. 1-6 and 8-9 and in various embodiments described within this patent document. The transmitter 715 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 720 receives information or data transmitted or sent by another device. For example, a user equipment can receive a message from a network device.

[0117] 8 shows an example flowchart for transmitting an uplink transmission. Operation 802 includes receiving, by a communications device, at least one reference signal in at least one radio time unit and a timing advance adjustment message, the timing advance adjustment message indicating timing advance-related information. Operation 902 includes, in response to receiving the at least one reference signal, transmitting an uplink transmission in a second radio time unit, a start time of the second radio time unit based on at least one timing value of the at least one radio time unit and the timing advance-related information.

[0118] In some embodiments, the start time of the second radio time unit is obtained by advancing the second radio time unit using a timing advance value indicated by the timing advance-related information. In some embodiments, the timing advance adjustment message is associated with transmission parameters that are the same as those associated with at least one reference signal. In some embodiments, at least one timing value of the at least one radio time unit is associated with a transmission parameter that is different from another transmission parameter of another timing value of another radio time unit in which the reference signal is received. In some embodiments, the transmission parameters include one or more reference signals, a reference signal resource set, a physical uplink control channel (PUCCH) resource set, panel-related information, a subarray, an antenna group, an antenna port group, a group of antenna ports, a beam group, a beam state, a candidate cell, a candidate cell list, a physical cell index (PCI), a time alignment group (TAG), TRP-related information, a CORESET pool index, a set of power control parameters, an index of a TCI state within a TCI state code point, a wireless communication device capability value, or information grouping wireless communication device capability sets.

[0119] In some embodiments, the at least one radio time unit includes at least one radio frame, and the second radio time unit includes a second radio frame. In some embodiments, the method further includes receiving information indicating a plurality of time alignment groups (TAGs) or a plurality of TAG indices and a plurality of transmission parameters, wherein the plurality of TAGs or the plurality of TAG indices are associated with the plurality of transmission parameters based on an order in which the plurality of TAGs or the plurality of TAG indices are indicated in the information. In some embodiments, the method further includes receiving information indicating a plurality of time alignment groups (TAGs) or a plurality of TAG indices and a plurality of transmission parameters, wherein the plurality of TAGs or the plurality of TAG indices are associated with the plurality of transmission parameters based on index values ​​of the plurality of TAGs or the plurality of TAG indices. In some embodiments, transmission of an uplink transmission is scheduled or configured for the communication device, wherein the transmission of the uplink transmission is not associated with transmission parameters, and the association between the transmission of the uplink transmission and default transmission parameters is based on a default rule or a message from the network device.

[0120] In some embodiments, the start time for transmission of the uplink transmission is based on (1) timing advance-related information, (2) at least one reference signal, and / or (3) at least one timing value associated with default transmission parameters. In some embodiments, the default transmission parameters indicated by a message from the network device or determined by default rules include any one or more of the following: a lowest CORESETPoolIndex value, a highest CORESETPoolIndex value, a time alignment group (TAG) with a lowest or highest TAG ID, a transmission configuration indicator (TCI) state associated with a lowest or highest TAG-ID, a transmission reception point (TRP)-related indication with a lowest or highest value, pre-configured transmission parameters, and / or a particular physical cell ID (PCI). In some embodiments, in response to the uplink transmission and the second uplink transmission overlapping in the time domain and / or the frequency domain, the uplink transmission is associated with a first transmission parameter and the second uplink transmission is associated with a second transmission parameter, the uplink transmission and the second uplink transmission are scheduled or configured for transmission using the first transmission parameter, the second transmission parameter is pre-configured or indicated by the network device, and the first transmission parameter is different from the second transmission parameter.

[0121] In some embodiments, the first transmission parameter or the second transmission parameter includes a sounding reference signal (SRS) resource set. In some embodiments, the uplink transmission and the second uplink transmission overlap in the time domain in response to different timing advance values ​​being applied to the uplink transmission and the second uplink transmission. In some embodiments, the method further includes determining, by the communications device, not to transmit the second uplink transmission associated with the second timing advance value within the time gap. In some embodiments, the time gap starts from an end of the uplink transmission associated with the first timing advance value or starts from an end of the radio frame associated with the first timing advance value. In some embodiments, the time gap is determined based on any one or more of a predetermined value set, a predetermined table, a predetermined default rule, or a message including at least one of a number of symbols, an index of the predetermined value set, or an index of an entry in the predetermined table.

[0122] In some embodiments, the method further includes performing, by the communications device, an operation in response to expiration of a timer associated with a Time Alignment Group (TAG). In some embodiments, performing the operation includes suspending all uplink transmissions except for a Physical Random Access Channel (PRACH) associated with all TAGs and maintaining timing advance values ​​for all TAGs in response to expiration of a timer associated with any of a plurality of Primary TAGs (PTAGs). In some embodiments, performing the operation includes suspending all uplink transmissions except for a Physical Random Access Channel (PRACH) associated with all TAGs and maintaining timing advance values ​​for all TAGs in response to expiration of a timer associated with a TAG having a particular TAG index. In some embodiments, the particular TAG index is zero or a particular TAG index value associated with a TAG that includes an SPCell. In some embodiments, the timer includes a Time Alignment Timer (TAT). In some embodiments, the at least one reference signal includes at least one downlink reference signal.

[0123] 9 shows an example flowchart for receiving an uplink transmission. Operation 902 includes transmitting, by the network device, at least one reference signal in at least one radio time unit and a timing advance adjustment message, where the timing advance adjustment message indicates timing advance-related information. Operation 904 includes receiving, in response to transmitting the at least one reference signal, an uplink transmission in a second radio time unit, where a start time of the second radio time unit is based on at least one timing value of the at least one radio time unit and the timing advance-related information.

[0124] In some embodiments, the second radio time unit is advanced using a timing advance value indicated by the timing advance-related information to obtain a start time of the second radio time unit. In some embodiments, the timing advance adjustment message is associated with transmission parameters that are the same as those associated with at least one reference signal. In some embodiments, at least one timing value of the at least one radio time unit is associated with a transmission parameter that is different from another transmission parameter of another timing value of another radio time unit in which the reference signal is received. In some embodiments, the transmission parameters include one or more reference signals, a reference signal resource set, a physical uplink control channel (PUCCH) resource set, panel-related information, a subarray, an antenna group, an antenna port group, a group of antenna ports, a beam group, a beam state, a candidate cell, a candidate cell list, a physical cell index (PCI), a time alignment group (TAG), TRP-related information, a CORESET pool index, a set of power control parameters, an index of a TCI state within a TCI state code point, a wireless communication device capability value, or information grouping wireless communication device capability sets.

[0125] In some embodiments, the at least one radio time unit includes at least one radio frame, and the second radio time unit includes a second radio frame. In some embodiments, the method further includes transmitting information indicating a plurality of time alignment groups (TAGs) or a plurality of TAG indices and a plurality of transmission parameters, wherein the plurality of TAGs or the plurality of TAG indices are associated with the plurality of transmission parameters based on an order in which the plurality of TAGs or the plurality of TAG indices are indicated in the information. In some embodiments, the method further includes transmitting information indicating a plurality of time alignment groups (TAGs) or a plurality of TAG indices and a plurality of transmission parameters, wherein the plurality of TAGs or the plurality of TAG indices are associated with the plurality of transmission parameters based on index values ​​of the plurality of TAGs or the plurality of TAG indices.

[0126] In some embodiments, transmission of the uplink transmission is scheduled by or configured for the communication device, the transmission of the uplink transmission is not associated with transmission parameters, and the association between the transmission of the uplink transmission and the transmission parameters is based on a default rule or a message from the network device. In some embodiments, a start time for transmission of the uplink transmission is based on (1) timing advance-related information, (2) at least one reference signal, and / or (3) at least one timing value associated with the default transmission parameters. In some embodiments, the default transmission parameters indicated by the message from the network device or determined by the default rule include any one or more of the following: a lowest CORESETPoolIndex value, a highest CORESETPoolIndex value, a time alignment group (TAG) with a lowest or highest TAG ID, a transmission configuration indicator (TCI) state associated with a lowest or highest TAG-ID, a transmission reception point (TRP)-related indication with a lowest or highest value, a pre-configured value, and / or a specific physical cell ID (PCI).

[0127] In some embodiments, the method further includes determining, by the network device, not to schedule a second uplink transmission associated with the second timing advance value within the time gap. In some embodiments, the time gap starts from an end of the uplink transmission associated with the first timing advance value or starts from an end of the radio frame associated with the first timing advance value. In some embodiments, the time gap is determined based on any one or more of a predetermined value set, a predetermined table, a predetermined default rule, or a message including at least one of a number of symbols, an index of the predetermined value set, or an index of an entry in a predetermined table. In some embodiments, the at least one reference signal includes at least one downlink reference signal.

[0128] In this document, the term "exemplary" is used to mean "an example of," and does not imply an ideal or preferred embodiment, unless otherwise specified.

[0129] Some of the embodiments described herein are described in the general context of methods or processes, which in one embodiment may be implemented by a computer program product embodied in a computer-readable medium including computer-executable instructions, such as program code, executed by computers in a networked environment. Computer-readable media may include removable and non-removable storage devices, including, but not limited to, read-only memory (ROM), random access memory (RAM), compact discs (CDs), digital versatile discs (DVDs), and the like. Thus, computer-readable media may include 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.

[0130] Some of the disclosed embodiments can be implemented as devices or modules using hardware circuits, software, or a combination thereof. For example, a hardware circuit implementation may include discrete analog and / or digital components integrated, for example, as part of a printed circuit board. Alternatively or additionally, the disclosed components or modules can be implemented as application-specific integrated circuits (ASICs) and / or field-programmable gate array (FPGA) devices. Some implementations may also or alternatively include a digital signal processor (DSP), which is a specialized microprocessor with an architecture optimized for the needs of digital signal processing operations associated with the disclosed functionality. Similarly, various components or subcomponents within each module may be implemented in software, hardware, or firmware. Connectivity between modules and / or components within a module may be provided using any one of connectivity methods and mediums known in the art, including, but not limited to, communication via the Internet, wired, or wireless networks using appropriate protocols.

[0131] While this document contains many details, these should be construed as descriptions of features specific to particular embodiments, rather than as limitations on the scope of the claimed invention or what may be claimed. Certain features described herein in the context of a separate embodiment can also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Also, while features may be described above as acting in a combination and even initially claimed as such, one or more features from the claimed combination can, in some cases, be deleted from the combination, and the claimed combination may be directed to a subcombination or a variation of the subcombination. Similarly, although operations are depicted in the figures in a particular order, this should not be understood as requiring such operations to be performed in the particular order shown, or in a sequential order, or that all of the illustrated operations be performed, to achieve desirable results.

[0132] Only a few implementations and examples have been described; other implementations, enhancements, and variations can be made based on what is described and illustrated in this disclosure.

Claims

1. 1. A wireless communication method, comprising: receiving, by a communications device, at least one reference signal in at least one radio time unit and a timing advance adjustment message; the timing advance adjustment message indicating timing advance related information; and transmitting an uplink transmission in a second radio time unit in response to receiving the at least one reference signal; a start time of the second radio time unit is based on at least one timing value of the at least one radio time unit and the timing advance related information; A method comprising:

2. The method of claim 1 , wherein the start time of the second radio time unit is obtained by advancing the second radio time unit using a timing advance value indicated by the timing advance related information.

3. The method of claim 1 , wherein the timing advance adjustment message is associated with transmission parameters that are the same as those associated with the at least one reference signal.

4. 2. The method of claim 1, wherein at least one timing value of the at least one radio time unit is associated with a transmission parameter that differs from another transmission parameter of another timing value of another radio time unit in which the reference signal is received.

5. 5. The method of claim 3, wherein the transmission parameters include one or more reference signals, reference signal resource sets, physical uplink control channel (PUCCH) resource sets, panel-related information, subarrays, antenna groups, antenna port groups, groups of antenna ports, beam groups, beam states, candidate cells, candidate cell lists, physical cell indices (PCIs), time alignment groups (TAGs), TRP-related information, CORESET pool indices, sets of power control parameters, indices of TCI states within TCI state code points, wireless communication device capability values, or information grouping wireless communication device capability sets.

6. The method of any one of claims 1 to 5, wherein the at least one radio time unit comprises at least one radio frame, and the second radio time unit comprises a second radio frame.

7. receiving information indicating a plurality of time alignment groups (TAGs) or a plurality of TAG indices and a plurality of transmission parameters; The method of claim 1 , wherein the plurality of TAGs or the plurality of TAG indexes are associated with the plurality of transmission parameters based on an order in which the plurality of TAGs or the plurality of TAG indexes appear in the information.

8. receiving information indicating a plurality of time alignment groups (TAGs) or a plurality of TAG indices and a plurality of transmission parameters; The method of claim 1 , wherein the plurality of TAGs or the plurality of TAG indexes are associated with the plurality of transmission parameters based on index values ​​of the plurality of TAGs or the plurality of TAG indexes.

9. transmission of the uplink transmission is scheduled or configured for the communication device; the transmission of the uplink transmission is not associated with a transmission parameter; The association between the transmission of the uplink transmission and the default transmission parameters is based on a default rule or a message from a network device. The method of claim 1.

10. 10. The method of claim 9, wherein the start time for transmission of the uplink transmission is based on (1) the timing advance related information, (2) the at least one reference signal, and / or (3) the at least one timing value associated with the default transmission parameter.

11. The default transmission parameters indicated by the message from the network device or determined by the default rule are: The lowest CORESETPoolIndex value, The highest CORESETPoolIndex value, a time-aligned group (TAG) with the lowest or highest TAG ID; a transmission configuration indicator (TCI) state associated with the lowest TAG-ID or the highest TAG-ID; Transmission Receive Point (TRP) related indication with minimum or maximum value; Preconfigured transmission parameters, and / or Specific Physical Cell ID (PCI) 11. The method of claim 10, comprising any one or more of:

12. In response to the uplink transmission and a second uplink transmission overlapping in the time domain and / or the frequency domain, the uplink transmission is associated with a first transmission parameter and the second uplink transmission is associated with a second transmission parameter; the uplink transmission and the second uplink transmission are scheduled or configured for transmission using the first transmission parameters; the second transmission parameter is pre-configured or indicated by the network device; the first transmission parameter is different from the second transmission parameter; The method of claim 1.

13. The method of claim 12 , wherein the first transmission parameter or the second transmission parameter comprises a sounding reference signal (SRS) resource set.

14. 13. The method of claim 12, wherein the uplink transmission and the second uplink transmission overlap in the time domain in response to different timing advance values ​​being applied to the uplink transmission and the second uplink transmission.

15. The method of claim 1 , further comprising determining, by the communications device, not to transmit a second uplink transmission associated with a second timing advance value within the time gap.

16. 16. The method of claim 15, wherein the time gap starts from an end of the uplink transmission associated with a first timing advance value or from an end of a radio frame associated with the first timing advance value.

17. 16. The method of claim 15, wherein the time gap is determined based on any one or more of a message including at least one of a predetermined set of values, a predetermined table, a predetermined default rule, or a number of symbols, an index of a predetermined set of values, or an index of an entry in the predetermined table.

18. The method of claim 1 , further comprising: performing an action by the communications device in response to expiration of a timer associated with a time alignment group (TAG).

19. 1. A wireless communication method, comprising: transmitting, by the network device, at least one reference signal in at least one radio time unit and a timing advance adjustment message; the timing advance adjustment message indicating timing advance related information; and receiving an uplink transmission in a second radio time unit in response to transmitting the at least one reference signal; a start time of the second radio time unit is based on at least one timing value of the at least one radio time unit and the timing advance related information; A method comprising:

20. 20. The method of claim 19, wherein the second radio time unit is advanced using a timing advance value indicated by the timing advance related information to obtain a start time of the second radio time unit.

21. 20. The method of claim 19, wherein the timing advance adjustment message is associated with transmission parameters that are the same as those associated with the at least one reference signal.

22. 20. The method of claim 19, wherein at least one timing value of the at least one radio time unit is associated with a transmission parameter that differs from another transmission parameter of another timing value of another radio time unit in which the reference signal is received.

23. 23. The method of claim 21 or 22, wherein the transmission parameters include one or more reference signals, reference signal resource sets, physical uplink control channel (PUCCH) resource sets, panel-related information, subarrays, antenna groups, antenna port groups, groups of antenna ports, beam groups, beam states, candidate cells, candidate cell lists, physical cell indices (PCIs), time alignment groups (TAGs), TRP-related information, CORESET pool indices, sets of power control parameters, indices of TCI states within TCI state code points, wireless communication device capability values, or information grouping wireless communication device capability sets.

24. The method of any one of claims 19 to 23, wherein the at least one radio time unit comprises at least one radio frame and the second radio time unit comprises a second radio frame.

25. transmitting information indicating a plurality of time alignment groups (TAGs) or a plurality of TAG indices and a plurality of transmission parameters; 20. The method of claim 19, wherein the plurality of TAGs or the plurality of TAG indices are associated with the plurality of transmission parameters based on an order in which the plurality of TAGs or the plurality of TAG indices appear in the information.

26. transmitting information indicating a plurality of time alignment groups (TAGs) or a plurality of TAG indices and a plurality of transmission parameters; The method of claim 19 , wherein the plurality of TAGs or the plurality of TAG indices are associated with the plurality of transmission parameters based on index values ​​of the plurality of TAGs or the plurality of TAG indices.

27. transmission of the uplink transmission is scheduled by or configured for the communication device; the transmission of the uplink transmission is not associated with a transmission parameter; 20. The method of claim 19, wherein the association between the transmission of the uplink transmission and the transmission parameters is based on a default rule or a message from the network device.

28. 28. The method of claim 27, wherein the start time for transmission of the uplink transmission is based on (1) the timing advance related information, (2) the at least one reference signal, and / or (3) the at least one timing value associated with default transmission parameters.

29. The default transmission parameters indicated by the message from the network device or determined by the default rule are: The lowest CORESETPoolIndex value, The highest CORESETPoolIndex value, a time-aligned group (TAG) with the lowest or highest TAG ID; a transmission configuration indicator (TCI) state associated with the lowest TAG-ID or the highest TAG-ID; Transmission Receive Point (TRP) related indication with minimum or maximum value; pre-configured values, and / or Specific Physical Cell ID (PCI) 29. The method of claim 28, comprising any one or more of:

30. 20. The method of claim 19, further comprising determining, by the network device, not to schedule a second uplink transmission associated with a second timing advance value within the time gap.

31. An apparatus for wireless communication, said apparatus comprising a processor configured to perform a method according to one or more of claims 1-30.

32. A non-transitory computer readable program storage medium having stored thereon code that, when executed by a processor, causes the processor to perform a method according to one or more of claims 1-30.

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