Timing adjustment techniques for uplink transmissions

Abstract

Techniques for performing uplink transmissions are described. An example wireless communication method includes a communication device receiving at least one reference signal in at least one wireless time unit and receiving a timing advance adjustment message, wherein the timing advance adjustment message indicates timing advance related information; and in response to receiving the at least one reference signal, transmitting an uplink transmission in a second wireless time unit, where a start time of the second wireless time unit is based on at least one timing value of the at least one wireless time unit and the timing advance related information.

Description

Technical Field

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

[0002] Mobile telecommunication technology is driving the world towards an increasingly connected and networked society. Compared with existing wireless networks, next-generation systems and wireless communication technologies need to support a wider range of use case characteristics and provide more complex and sophisticated 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 wireless system, known as 5G, advances the LTE and LTE-A wireless standards and is committed to supporting higher data rates, a large number of connections, ultra-low latency, high reliability, and other emerging business needs. Summary of the invention

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

[0005] A first example wireless communication method includes: a communication device receiving at least one reference signal in at least one wireless time unit and receiving a timing advance adjustment message, wherein the timing advance adjustment message indicates timing advance related information; and in response to receiving the at least one reference signal, sending an uplink transmission in a second wireless time unit, wherein a start time of the second wireless time unit is based on at least one timing value of the at least one wireless 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 by a timing advance value indicated by the timing advance related information. In some embodiments, the timing advance adjustment message is associated with a transmission parameter that is the same as a transmission parameter associated with at least one reference signal. In some embodiments, at least one timing value of 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 for which the reference signal is received. In some embodiments, the transmission parameters include information for grouping 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), transmit-receive point (TRP) related information, a CORESET pool index, a power control parameter set, a TCI state index in a transmission configuration indicator (TCI) state code point, a wireless communication device capability value, or a wireless communication device capability set.

[0007] In some embodiments, at least one radio time unit includes at least one radio frame, and wherein the second radio time unit includes a second radio frame. In some embodiments, the method further includes receiving information indicating a plurality of TAGs or a plurality of TAG indexes and a plurality of transmission parameters, and wherein the plurality of TAGs or a plurality of TAG indexes are associated with a plurality of transmission parameters based on an order of the plurality of TAGs or a plurality of TAG indexes indicated in the information. In some embodiments, the method further includes receiving information indicating a plurality of TAGs or a plurality of TAG indexes and a plurality of transmission parameters, and wherein the plurality of TAGs or a plurality of TAG indexes are associated with a plurality of transmission parameters based on an index value of the plurality of TAGs or a plurality of TAG indexes. In some embodiments, the transmission of an uplink transmission is scheduled or configured for the communication device, the transmission of the uplink transmission is not associated with the transmission parameters, and 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.

[0008] In some embodiments, a transmission start time of an 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 a default transmission parameter. In some embodiments, the default transmission parameter indicated by a message from the network device or determined by a default rule includes any one or more of the following: a lowest CORESETPoolIndex value, a highest CORESETPoolIndex value, a TAG with a lowest TAG ID or a highest TAG ID, a TCI state associated with a lowest TAG ID or a highest TAG ID, a TRP related indication with a lowest value or a highest value, a preconfigured transmission parameter, and / or a specific physical cell ID (Physical Cell ID, PCI). In some embodiments, in response to an uplink transmission and a second uplink transmission overlapping in a time domain and / or a frequency domain, the uplink transmission is associated with a first transmission parameter and the second uplink transmission is associated with a second transmission parameter, wherein the uplink transmission and the second uplink transmission are scheduled or configured to be transmitted using the first transmission parameter, wherein the second transmission parameter is preconfigured or indicated by the network device, and wherein 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, in response to applying different timing advance values ​​to the uplink transmission and the second uplink transmission, the uplink transmission and the second uplink transmission overlap in the time domain. In some embodiments, the method also includes the communication device determining 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 the end of the uplink transmission associated with the first timing advance value, or from the 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 the following: a predetermined value set, a predetermined table, a predetermined default rule, or a message including at least one of the number of symbols, an index to a predetermined value set, or an index to an entry in a predetermined table.

[0010] In some embodiments, the method further includes the communication device performing an operation in response to the expiration of a timer associated with the TAG. In some embodiments, performing the operation includes canceling all uplink transmissions except the Physical Random Access Channel (PRACH) associated with all TAGs in response to the expiration of a timer associated with any one of a plurality of primary TAGs (PTAGs), and maintaining the timing advance values ​​of all TAGs. In some embodiments, performing the operation includes canceling all uplink transmissions except the PRACH associated with all TAGs in response to the expiration of a timer associated with a TAG with a specific TAG index, and maintaining the timing advance values ​​of all TAGs. In some embodiments, the specific TAG index is zero or a specific TAG index value associated with a TAG containing 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 example wireless communication method includes: a network device sending at least one reference signal in at least one wireless time unit and sending a timing advance adjustment message, wherein the timing advance adjustment message indicates timing advance related information; and in response to sending at least one reference signal, receiving an uplink transmission in a second wireless time unit, wherein a start time of the second wireless time unit is based on at least one timing value of at least one wireless time unit and the timing advance related information.

[0012] In some embodiments, the second radio time unit is advanced by 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 a transmission parameter, which is the same as the transmission parameter associated with at least one reference signal. In some embodiments, at least one timing value of at least one radio time unit is associated with a transmission parameter, which 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 parameter includes information for grouping one or more reference signals, a reference signal resource set, a 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 PCI, a TAG, TRP related information, a CORESET pool index, a power control parameter set, a TCI state index in a TCI state code point, a wireless communication device capability value, or a wireless communication device capability set.

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

[0014] In some embodiments, the transmission of uplink transmission is scheduled by a network device or configured for a communication device, the transmission of uplink transmission is not associated with a transmission parameter, and the association between the transmission of uplink transmission and the transmission parameter is based on a default rule or a message from the network device. In some embodiments, the transmission start time 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 parameter. In some embodiments, the default transmission parameter indicated by the message from the network device or determined by the default rule includes any one or more of the following: the lowest CORESETPoolIndex value, the highest CORESETPoolIndex, the TAG with the lowest TAG ID or the highest TAG ID, the TCI state associated with the lowest TAG ID or the highest TAG ID, the TRP related indication with the lowest value or the highest value, the preconfigured value and / or the specific PCI.

[0015] In some embodiments, the method further includes the network device determining 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 the end of the uplink transmission associated with the first timing advance value, or from the 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 to a predetermined value set, or an index to an entry in a predetermined table. In some embodiments, the at least one reference signal includes at least one downlink reference signal.

[0016] In another exemplary aspect, the above method is specifically implemented in the form of processor executable code and stored in a non-transitory computer readable storage medium. When the code included in the computer readable storage medium is executed by a processor, the processor implements the method described in this patent document.

[0017] In yet another exemplary embodiment, an apparatus configured or operable to perform the above method is disclosed.

[0018] The above and other aspects and embodiments thereof are described in more detail in the drawings, the description and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Inter-cell or TRP uplink transmissions from multiple User Equipment (UE) are shown.

[0020] Figure 2 Adjacent frames are shown overlapping due to applying different Timing Advances (TA).

[0021] Figure 3 An example of determining downstream and upstream timing is shown.

[0022] Figure 4 An example of determining both downstream and upstream timing is shown.

[0023] Figure 5 An example association between uplink transmission and TAG is shown.

[0024] Figure 6 An example of wireless communication including a base station (BS) and a UE based on some embodiments of the disclosed technology is shown.

[0025] Figure 7 An exemplary block diagram of a hardware platform that may be part of a network device or a communication device is shown.

[0026] Figure 8 An exemplary flow chart for transmitting an uplink transmission is shown.

[0027] Fig. 9 An exemplary flow chart for receiving an uplink transmission is shown. DETAILED DESCRIPTION

[0028] Multiple Transmit-Receive Points (MTRP) transmission technology has been greatly developed, and multiple TRPs can be implemented through multiple base stations or multiple antenna panels of a base station. Uplink time alignment technology can make the arrival timing of transmissions from multiple UEs within an acceptable range and allow reliable demodulation on the network side. Uplink time alignment can require the UE to adjust the transmission timing of the uplink transmission to advance it from the reference downlink timing, where when a unified downlink reference timing cannot meet certain requirements, each TRP / cell may need to have a separate reference downlink timing.

[0029] The UE may receive a timing advance command (TAC) corresponding to a TAG index, and the UE will determine the uplink transmission timing of the uplink transmission associated with the TAG based on the received TAC. Due to scheduling schemes, configurations, etc., the association between different uplink transmissions and their corresponding TAGs may be different.

[0030] With the development of UE, some UEs with higher capabilities have multiple panels and multiple RF links. Therefore, it is possible for the UE to transmit uplink transmissions through multiple panels at the same time. The simultaneous transmission of more than one uplink signal / channel by the UE through multiple panels can be referred to as simultaneous transmission across multiple panels (Simultaneous Transmission Across Multiple Panels, STxMP). When the 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. In order to transmit two uplink transmissions, rather than canceling one of the uplink transmissions due to reducing the duration of the timeslot, a UE with STxMP capability may be allowed to transmit simultaneously via multiple antenna panels.

[0031] The example titles of the following sections are intended to aid in understanding the disclosed subject matter and do not in any way limit the scope of the claimed subject matter. Therefore, one or more features of one example section may be combined with one or more features of another example section. In addition, for clarity of explanation, 5G terminology is used, but the technology disclosed in this document is not limited to 5G technology, but can also be used in wireless systems implementing other protocols.

[0032] I. Introduction

[0033] In LTE and New Radio (NR) wireless systems, downlink and uplink synchronization are necessary steps to ensure reliable wireless communication. Downlink synchronization is achieved by receiving the Primary Synchronization Signal (PSS) and the Secondary Synchronization Signal (SSS), and uplink synchronization is achieved through the random access process and uplink timing alignment maintenance.

[0034] Figure 1 Figure 2 shows inter-cell / TRP uplink transmissions from multiple UEs. Figure 1As shown, different geographical locations of base stations or different physical orientations of panels may result in different transmission delays for all uplink and downlink signals. Uplink synchronization is to ensure that the arrival time of uplink signals from different UEs can be within the range of the cyclic preamble of the downlink subframe / time slot / sub-time slot. 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 the radio resource control (RRC) signaling. TA,offset The TAC is related to the TAC contained in the Medium Access Control Control Element (MAC CE). Usually, the network configures multiple TAGs to indicate the timing advance of multiple serving cells, and each TAG includes one or more serving cells. The base station sends the TAC associated with the TAG, and the UE applies the TAC to determine the timing advance of all serving cells in the TAG. TA,offset , the UE expects to configure the same value for serving cells in the same TAG.

[0036] For MTRP, the UE can send a signal to the TRP in the same serving cell and obtain the association between the TRP and the signal based on CORESETPoolIndex, PCI or other information. For PUSCH (Configured Grantbased PUSCH, CG-PUSCH) transmission based on configuration authorization, periodic PUCCH transmission or sounding reference signal transmission, the UE sends the corresponding signal based on the configured transmission information (such as time domain / frequency domain position and period), which means that the uplink signal is not associated with downlink control information (Downlink control link, DCI) or CORESETPoolIndex. The association between SRS / CG-PUSCH / P-PUCCH and TRP can only be obtained through RRC messages, such as associated TCI status, associated reference signal or explicit information elements.

[0037] When the UE receives two TACs and determines two uplink transmission timelines, the two uplink transmissions scheduled to be non-overlapping may be transmitted by the UE in an overlapping manner in the time domain. Figure 2 As shown, TA is applied to the two uplink transmissions respectively. 1 and TA 2 , and the two uplink transmissions overlap in the time domain, the simultaneous uplink transmissions may be operated to avoid canceling one of the overlapping uplink transmissions. Figure 2 Adjacent frames are shown overlapping due to applying different TAs.

[0038] In this patent document, the term "transmission parameter" includes any one or more of a TRP, a physical cell, a base station, or a group of panels of a base station. In addition, a TRP may include any one or more of "information for grouping one or more reference signals", "resource set", "panel", "subarray", "antenna group", "antenna port group", "a group of antenna ports", "beam group", "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, a SS / PBCH block index, a TCI state index, a PCI, an RS set index, an SRS resource set index, a spatial relation 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 CSI-RS resources, 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 the downlink TCI state, the uplink TCI state, or the uplink and downlink TCI states. In this patent document, the term "uplink signal" may be PUCCH, PUSCH, SRS, or PRACH. In this patent document, the term "uplink transmission" may be the transmission timing of an uplink signal, the retransmission of an uplink signal, or an uplink signal. In this patent document, the term "downlink reference signal" may be a path loss RS, a CSI RS, or an SSB. In this patent document, the term "time slot" is equivalent to a sub-time slot, a frame, or a subframe. In this patent document, the term "uplink control information (UCI)" includes HARQ-ACK information, SR, LRR, or CSI. In this patent document, the term "TAG" may include one or more service cells or one or more service 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] Various methods or techniques for adjusting uplink transmission timing are contemplated in the following example aspects:

[0042] Aspect (1): The UE receives at least one downlink reference signal and at least one timing advance adjustment message from the base station, the UE determines at least one downlink reference timing based on the received downlink reference signal, and the UE determines a transmission timing of an uplink transmission that will be advanced from the downlink reference timing,

[0043] The advance amount is determined based on a timing advance adjustment message;

[0044] 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 transmission information;

[0045] The downlink reference signal includes any one or more of the following: a path loss reference signal, a CSI reference signal or an SSB;

[0046] The transmission parameters include any one or more of the following: TRP, cell, TRP indication, TRP related information, cell related information, TAG, TCI state indicated by MAC CE, TCI state indicated by PDCCH, etc.;

[0047] The uplink transmission includes any one or more of the following: a transmission opportunity of an uplink signal, a retransmission of an uplink signal, or an uplink signal, wherein the uplink signal includes PUCCH, PUSCH, SRS, or PRACH; and / or

[0048] The timing advance adjustment message, the downlink reference signal, and the downlink reference timing are associated with corresponding transmission parameters.

[0049] Details related to aspect (1) are further described in Example Embodiment 1 of this patent document.

[0050] Aspect (2): The UE receives an information element including at least one time alignment group index (TAG-ID), wherein the UE determines the association between the TAG index and the transmission parameter based on the position of the TAG-ID in the information element, the ascending / descending order of the TAG-ID, or explicit signaling in the information element.

[0051] Details related to aspect (2) are further described in Example Embodiment 2 of this patent document.

[0052] Aspect (3): The UE is scheduled or configured for uplink transmission that is not associated with transmission parameters,

[0053] wherein the UE determines the transmission timing of the uplink transmission based on (a) the timing advance adjustment message, (b) the downlink reference signal and / or (c) the downlink reference timing associated with the default transmission parameters, and / or

[0054] The default transmission parameters include any one or more of the following: lowest / highest CORESETPoolIndex value, TAG with lowest / highest TAG-ID, TCI state associated with lowest / highest TAG-ID, TRP indication with lowest / highest value, preconfigured transmission parameters or specific transmission parameters.

[0055] Details related to aspect (3) are further described in Example Embodiment 3 of this patent document.

[0056] Aspect (4): the UE is scheduled or configured with a first transmission and a second transmission associated with a first transmission parameter,

[0057] The UE determines the transmission timing of the first transmission and the second transmission based on the corresponding timing advance adjustment message, and then the two transmissions overlap in the time domain,

[0058] wherein the UE determines to transmit a first transmission associated with a first transmission parameter, wherein the association between the first transmission and the first transmission parameter may be configured or scheduled,

[0059] wherein the UE determines to transmit a second transmission associated with a second transmission parameter, and / or

[0060] The second transmission parameter is preconfigured or indicated by the base station.

[0061] Details related to aspect (4) are further described in example embodiment 4 of this patent document.

[0062] Aspect (5): The UE is configured with at least one TAG, and at least one TAT is configured for each TAG, wherein when the TAT expires, the UE determines to cancel uplink transmission associated with at least the corresponding TAG,

[0063] When the TAT associated with a specific TAG expires, the UE determines to cancel the uplink transmission associated with all configured TAGs, wherein the cancellation of the uplink transmission includes clearing the HARQ buffer, releasing the configured PUCCH / SRS, clearing the configured downlink allocation, clearing the configured uplink grant, or clearing the PUSCH resources used for semi-persistent CSI reporting.

[0064] Details related to aspect (5) are further described in example embodiment 5 of this patent document.

[0065] II. Example Embodiment 1

[0066] Example embodiment 1 describes a technology for determining at least one downlink reference timing associated with corresponding transmission parameters (e.g., one or more start times of one or more downlink frames) based on a received downlink reference signal (e.g., in 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.

[0067] In some embodiments, the timing advance adjustment message is associated with at least one TCI state, a TCI state group, or a TCI state pool, and at least one downlink reference signal is associated with the TCI state, the TCI state group, or the TCI state pool.

[0068] In some embodiments, the timing advance adjustment message and at least one downlink reference signal are associated with the same transmission parameter. In some embodiments, each downlink reference timing is associated with a different transmission parameter. In some embodiments, the transmission parameter may include TRP-related information or cell-related information.

[0069] In some embodiments, the UE receives a downlink reference signal and determines a corresponding downlink timing, and the UE also determines a downlink timing of a downlink frame (eg, Figure 3 The UE determines the transmission timing of the uplink transmission based on the downlink timing of the downlink frame and the timing advance adjustment message (for example, Figure 3 The start time of uplink frame i+2 in .

[0070] In one example, the uplink transmission associated with the downlink reference signal will be transmitted in an uplink frame, and the UE determines that the transmission timing of the uplink frame will be advanced from the downlink frame timing by an amount determined by the corresponding timing advance adjustment message.

[0071] In one example, uplink transmission is indicated / configured to use a downlink reference signal as a path loss RS. In another example, QCL type information of the uplink transmission and the downlink reference signal is type A or type C. In another example, uplink transmission is indicated / configured to use spatial relationship information associated with the downlink reference signal.

[0072] In some embodiments, the UE receives a downlink reference signal and determines a corresponding downlink timing. The UE determines a transmission timing of an uplink transmission based on the downlink timing, the timing advance adjustment message and a plurality of time domain transmission parameters.

[0073] In one example, the time domain transmission parameters include a start symbol and length indication, a system frame number, SCS or slot index.

[0074] Figure 3 An example of determining downlink and uplink timing is shown. Figure 3In the example shown, the 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 uplink transmissions associated with the downlink reference signal, wherein the timing advance is determined based on the corresponding timing advance adjustment message.

[0075] Figure 4 An example of determining both downlink and uplink timing is shown. Figure 4 In the example shown, the UE receives a first downlink reference signal and determines corresponding downlink timing of one or more downlink frames, further receives a second downlink reference signal and determines corresponding downlink timing of one or more downlink frames. The UE further determines the uplink transmission timing of the uplink transmission based on the corresponding timing advance adjustment message and the timing of the downlink frame determined by the associated downlink reference signal.

[0076] III. Example Embodiment 2

[0077] Example embodiment 2 describes a technique for determining an association between a TAG index and a transmission parameter.

[0078] In some embodiments, more than one TAG or TAG index for a serving cell is configured for the UE in an information element received by the UE.

[0079] In one example, 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.

[0080] In one example, the UE associates a TAG having a lower TAG index value with a first transmission parameter and associates a TAG having a higher TAG index value with a second transmission parameter.

[0081] In one example, the UE associates the TAG / TAG index with the transmission parameter according to the explicit indication / configuration in the information element. For example, the field described as TAG-Id is associated with the first transmission parameter, and the field described as TAG-Id-additional is associated with the second transmission parameter.

[0082] In the above example, the first transmission information can be a CORESETPoolIndex value of 0, a physical cell index configured in ServingCellConfigCommon, or a reference signal group index associated with a CORESETPoolIndex value of 0, and the second transmission information can be a CORESETPoolIndex value of 1, an additional physical cell index, or a reference signal group index associated with a CORESETPoolIndex value of 1.

[0083] In some embodiments, the UE is configured with more than one TAG associated with at least one serving cell configuration.

[0084] 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.

[0085] In some embodiments, the TAG index of one of the TAGs associated with the SPCell is 0.

[0086] In some embodiments, the TAG index of the TAG associated with a specific transmission parameter is 0, where the specific transmission parameter includes a CORESETPoolIndex value of 0, a TCI state associated with a CORESETPoolIndex value of 0, or a downlink reference signal group associated with CORESETPoolIndex0.

[0087] In some embodiments, the TAG with a TAG index of 0 is the primary TAG (PTAG).

[0088] In some embodiments, the TAGs associated with the SPCell are PTAGs.

[0089] In this embodiment, the UE determines the transmission timing of the uplink transmission associated with the transmission parameter based on the timing advance adjustment message associated with the corresponding TAG / TAG index.

[0090] IV. Example 3

[0091] Example embodiment 3 describes a technique for determining an 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.

[0092] In some embodiments, uplink transmissions are not associated with a transmission parameter or are typically associated with more than one transmission parameter.

[0093] In one example, for an uplink transmission resource set that is generally not configured in association with a specific transmission parameter, the UE determines to associate the uplink transmission resource set with a default TAG / TAG index.

[0094] In one example, for an uplink transmission that is configured as periodic transmission and is not associated with a specific transmission parameter, the UE determines to associate the uplink transmission with a default TAG / TAG index.

[0095] In the above examples, the default TAG / TAG index is a TAG / TAG index associated with a specific CORESETPoolIndex value, a physical cell index configured in ServingCellConfigCommon, a reference signal group index associated with specific transmission parameters, or a TCI state associated with specific transmission parameters.

[0096] In some embodiments, the 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.

[0097] In one example, the TCI state indication MAC CE includes 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 downlink TCI state, uplink TCI state, or joint TCI state.

[0098] In one example, the UE receives a TCI status indication MAC CE and determines an association between an uplink transmission and the indicated TCI status.

[0099] In one example, the at least one uplink transmission is not associated with a TCI state, and before receiving the TCI state indication MAC CE, the TCI state is further associated with a TAG / TAG index.

[0100] Figure 5 An example association between uplink transmission and TAG is shown. Figure 5 In the example shown, for most uplink transmissions, the UE can determine the association between the uplink transmission and the TAG based on the transmission parameters configured or indicated for it. For some uplink transmissions that are not associated with the transmission parameters indicated to the UE, the UE can determine the association based on a rule (e.g., a pre-configured default TAG) or a network message (e.g., a specific TCI status indication MAC CE).

[0101] V. Example 4

[0102] Example embodiment 4 describes a technique for resolving the overlap problem when different timing advance values ​​are applied when performing simultaneous uplink transmission operations.

[0103] In the following embodiments, the UE has the capability of simultaneous uplink transmission, and the operation has been enabled, allowed or indicated (if any).

[0104] In some embodiments, the UE simultaneously transmits more than one uplink transmission via multiple panel-related information including antenna port groups, antenna panels, antenna panel groups, beam groups, or TCI states.

[0105] In some embodiments, the UE is scheduled or configured with a first uplink transmission and a second uplink transmission, and the two uplink transmissions overlap in the time domain due to application of different timing advance adjustment values.

[0106] In one example, the two uplink transmissions are associated with different panel-related information. The UE transmits each of the two uplink transmissions based on the corresponding panel-related information, and does not reduce the transmission duration of any uplink transmission or cancel any uplink transmission.

[0107] In one example, 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 reduce the transmission duration of any uplink transmission or cancel any uplink transmission.

[0108] In one example, the network configures / indicates at least one panel-related information to be used in the case of a simultaneous uplink transmission operation. When there is an indication or configuration, the UE may transmit uplink transmission based on the indicated / configured panel-related information rather than based on the associated panel-related information. When there is no indication or configuration, the UE transmits uplink transmission based on the associated panel-related information.

[0109] In one example, the UE determines to cancel the first uplink transmission or the second uplink transmission, and reports a message to notify the base station that simultaneous uplink transmission is required.

[0110] In one example, the UE determines to reduce the transmission duration of the first uplink transmission or the second uplink transmission, and reports a message to notify the base station that simultaneous uplink transmission is required.

[0111] In one example, after sending a reporting message carrying a simultaneous uplink transmission requirement, the UE may be instructed / enabled / configured to transmit two uplink transmissions based on different panel related information.

[0112] In the above example, the reduced transmission duration is at least equal to the length of the overlapping portion of the two uplink transmissions.

[0113] In some embodiments, the UE does not desire to transmit an uplink transmission associated with the first timing advance adjustment value during a time slot beginning at the end of an uplink transmission associated with the second timing advance adjustment value.

[0114] In some embodiments, the UE does not expect to transmit an uplink transmission associated with the first timing advance adjustment value in a time slot starting from the end of an uplink frame associated with the second timing advance adjustment value.

[0115] In some embodiments, the time gap is determined based on a predetermined value set (including multiple time gap values), a predetermined table, a predetermined default rule (for example, some predetermined time gap values ​​used under specific conditions), or a message including at least one of the number of symbols, an index to a predetermined value set, or an index to an entry in a predetermined table.

[0116] In some embodiments, when simultaneous uplink transmission is enabled / permitted / indicated, the UE ignores the time gap. In such an embodiment, the UE may perform a first uplink transmission and a second uplink transmission without a time gap between the two transmissions.

[0117] In some embodiments, the UE is enabled / permitted / instructed to perform simultaneous uplink transmissions. For uplink transmissions associated with different TAs but with the same transmission parameters (e.g., SRS resource sets), the above time gap should be maintained. For uplink transmissions associated with different transmission parameters (e.g., SRS resource sets), the time gap may be ignored.

[0118] VI. Example Embodiment 5

[0119] Example embodiment 5 describes techniques for UE behavior when the TAT associated with a TAG expires.

[0120] In some embodiments, when the UE receives a timing advance adjustment message associated with the TAG, the TAT associated with the TAG will start or restart. TAT expiration is equivalent to the gap between the current timing and the reception timing of the last timing advance adjustment message exceeding the TAT.

[0121] In some embodiments, canceling uplink transmission upon expiration of the TAT timer includes clearing a HARQ buffer, releasing a configured PUCCH / SRS, clearing a configured downlink allocation, clearing a configured uplink grant, or clearing PUSCH resources for semi-persistent CSI reporting.

[0122] In some embodiments, when the TAT associated with a unique PTAG expires, the UE cancels all uplink transmissions associated with all TAGs and maintains the timing advance adjustment values ​​of all TAGs.

[0123] In some embodiments, when the TAT associated with any PTAG expires, the UE cancels all uplink transmissions associated with all TAGs and maintains the timing advance values ​​of all TAGs.

[0124] In some embodiments, when the TAT associated with a PTAG with a specific TAG index expires, the UE cancels all uplink transmissions associated with all TAGs and maintains the timing advance values ​​of all TAGs.

[0125] In some embodiments, when the TAT associated with a PTAG without a specific TAG index expires, the UE cancels all uplink transmissions associated with the TAG and maintains the timing advance value of the TAG.

[0126] In some embodiments, when the TAT associated with a PTAG without a specific TAG index expires, the UE cancels all uplink transmissions associated with the TAG and maintains the timing advance value of the TAG.

[0127] In some embodiments, when the TAT associated with a STAG with a specific TAG index expires, the UE cancels all uplink transmissions associated with all TAGs and maintains the timing advance values ​​of all TAGs.

[0128] In some embodiments, when the TAT associated with any STAG expires, the UE cancels all uplink transmissions associated with the TAG and maintains the timing advance value of the TAG.

[0129] In the above embodiment, the specific TAG index may be a TAG index value 0 or a TAG index value associated with a TAG including the SPCell.

[0130] In some embodiments, when the TAT associated with a TAG expires and the TAG contains at least one service cell configured with more than one TAG and at least one TAT associated with these TAGs has not expired, the UE determines the uplink transmission timing associated with the TAG based on the timing advance adjustment message associated with the TAG in the TAG whose TAT has not expired, and maintains the timing advance value of the TAG.

[0131] In the above embodiment, maintaining the timing advance value includes determining the uplink transmission timing based on the received timing advance adjustment message.

[0132] This patent document describes example techniques for adjusting transmission timing of uplink signals / channels when multiple downlink / uplink timings are applied. Thus, an example technique for describing downlink / uplink timing based on reception of downlink reference signals and association between uplink transmissions and downlink reference signals; an example technique for describing association between TAG indexes and uplink transmissions; and an example technique for describing simultaneous uplink transmission operations in the case of overlap between uplink transmissions is described.

[0133] The embodiments described above will be applicable to wireless communications. Figure 6An example of a wireless communication system (e.g., a 5G or NR cellular network) including a base station 620 and one or more UEs 611, 612, and 613 is shown. In some embodiments, the UE accesses the BS (e.g., the network) using a communication link to the network (sometimes referred to as an uplink direction, as shown by dashed arrows 631, 632, 633), and then enables subsequent communication from the BS to the UE (e.g., as shown in the direction from the network to the UE, sometimes referred to as a downlink direction, as shown by arrows 641, 642, 643). In some embodiments, the BS sends information to the UE (sometimes referred to as a downlink direction, as shown by arrows 641, 642, 643), which then enables subsequent communication from the UE to the BS (e.g., shown in the direction from the UE to the BS, sometimes referred to as an uplink direction, as shown by dashed arrows 631, 632, 633). The UE can be, for example, a smartphone, a tablet, a mobile computer, a machine to machine (M2M) device, an Internet of Things (IoT) device, etc.

[0134] Figure 7 FIG. 7 is an exemplary 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., a UE). The hardware platform 700 includes at least one processor 710 and a memory 705 having instructions stored thereon. When the instructions are executed by the processor 710, the hardware platform 500 is configured to execute Figures 1 to 6 and Figures 8 to 9 As well as the operations described in various embodiments described in this patent document. Transmitter 715 transmits or sends information or data to another device. For example, a network device transmitter can send a message to a user device. Receiver 720 receives information or data transmitted or sent by another device. For example, a user device can receive a message from a network device.

[0135] Figure 8 An exemplary flow chart for transmitting an uplink transmission is shown. Operation 802 includes a communication device receiving at least one reference signal in at least one radio time unit and a timing advance adjustment message, wherein the timing advance adjustment message indicates timing advance related information. Operation 902 includes sending an uplink transmission in a second radio time unit in response to receiving the at least one reference signal, wherein 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.

[0136] In some embodiments, the start time of the second radio time unit is obtained by advancing the second radio time unit by a timing advance value indicated by the timing advance related information. In some embodiments, the timing advance adjustment message is associated with a transmission parameter, which is the same as the transmission parameter associated with at least one reference signal. In some embodiments, at least one timing value of at least one radio time unit is associated with a transmission parameter, which is different from another transmission parameter of another timing value of another radio time unit for which the reference signal is received. In some embodiments, the transmission parameter includes information for grouping one or more reference signals, a reference signal resource set, a 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 PCI, a TAG, TRP related information, a CORESET pool index, a power control parameter set, a TCI state index in a TCI state code point, a wireless communication device capability value, or a wireless communication device capability set.

[0137] In some embodiments, the at least one radio time unit includes at least one radio frame, and wherein the second radio time unit includes a second radio frame. In some embodiments, the method further includes receiving information indicating a plurality of TAGs or a plurality of TAG indexes and a plurality of transmission parameters, and wherein the plurality of TAGs or a plurality of TAG indexes are associated with a plurality of transmission parameters based on an order in which the plurality of TAGs or a plurality of TAG indexes are indicated in the information. In some embodiments, the method further includes receiving information indicating a plurality of TAGs or a plurality of TAG indexes and a plurality of transmission parameters, and wherein the plurality of TAGs or a plurality of TAG indexes are associated with a plurality of transmission parameters based on index values ​​of the plurality of TAGs or a plurality of TAG indexes. In some embodiments, the transmission of an uplink transmission is scheduled or configured for the communication device, the transmission of the uplink transmission is not associated with the transmission parameters, and 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.

[0138] In some embodiments, a transmission start time of an 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 a default transmission parameter. In some embodiments, the default transmission parameter indicated by a message from the network device or determined by a default rule includes any one or more of the following: a lowest CORESETPoolIndex value, a highest CORESETPoolIndex value, a TAG with a lowest TAG ID or a highest TAG ID, a TCI state associated with a lowest TAG-ID or a highest TAG-ID, a TRP related indication with a lowest value or a highest value, a preconfigured transmission parameter, and / or a specific PCI. In some embodiments, in response to an uplink transmission and a second uplink transmission overlapping in a time domain and / or a frequency domain, the uplink transmission is associated with a first transmission parameter and the second uplink transmission is associated with a second transmission parameter, wherein the uplink transmission and the second uplink transmission are scheduled or configured to be transmitted using the first transmission parameter, wherein the second transmission parameter is preconfigured or indicated by the network device, and wherein the first transmission parameter is different from the second transmission parameter.

[0139] In some embodiments, the first transmission parameter or the second transmission parameter includes an SRS resource set. In some embodiments, in response to applying different timing advance values ​​to the uplink transmission and the second uplink transmission, the uplink transmission and the second uplink transmission overlap in the time domain. In some embodiments, the method also includes the communication device determining 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 the end of the uplink transmission associated with the first timing advance value, or from the 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 the following: a predetermined value set, a predetermined table, a predetermined default rule, or a message including at least one of the number of symbols, an index to a predetermined value set, or an index to an entry in a predetermined table.

[0140] In some embodiments, the method further includes the communication device performing an operation in response to the expiration of a timer associated with the TAG. In some embodiments, performing the operation includes canceling all uplink transmissions except the PRACH associated with all TAGs in response to the expiration of a timer associated with any one of a plurality of PTAGs, and maintaining the timing advance values ​​of all TAGs. In some embodiments, performing the operation includes canceling all uplink transmissions except the PRACH associated with all TAGs in response to the expiration of a timer associated with a TAG with a specific TAG index, and maintaining the timing advance values ​​of all TAGs. In some embodiments, the specific TAG index is zero or a specific TAG index value associated with a TAG containing an SPCell. In some embodiments, the timer includes a TAT. In some embodiments, the at least one reference signal includes at least one downlink reference signal.

[0141] Fig. 9 An exemplary flow chart for receiving an uplink transmission is shown. Operation 902 includes a network device sending at least one reference signal in at least one radio time unit and sending a timing advance adjustment message, wherein the timing advance adjustment message indicates timing advance related information. Operation 904 includes receiving an uplink transmission in a second radio time unit in response to sending the at least one reference signal, wherein 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.

[0142] In some embodiments, the second radio time unit is advanced by 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 a transmission parameter, which is the same as the transmission parameter 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, which 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 parameter includes information for grouping one or more reference signals, a reference signal resource set, a 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 PCI, a TAG, TRP related information, a CORESET pool index, a power control parameter set, a TCI state index in a TCI state code point, a wireless communication device capability value, or a wireless communication device capability set.

[0143] In some embodiments, the at least one radio time unit comprises at least one radio frame, and wherein the second radio time unit comprises a second radio frame. In some embodiments, the method further comprises transmitting information indicating a plurality of TAGs or a plurality of TAG indexes and a plurality of transmission parameters, and wherein the plurality of TAGs or a plurality of TAG indexes are associated with a plurality of transmission parameters based on an order in which the plurality of TAGs or a plurality of TAG indexes are indicated in the information. In some embodiments, the method further comprises transmitting information indicating a plurality of TAGs or a plurality of TAG indexes and a plurality of transmission parameters, and wherein the plurality of TAGs or a plurality of TAG indexes are associated with a plurality of transmission parameters based on index values ​​of the plurality of TAGs or a plurality of TAG indexes.

[0144] In some embodiments, the transmission of uplink transmission is scheduled by a network device or configured for a communication device, the transmission of uplink transmission is not associated with a transmission parameter, and the association between the transmission of uplink transmission and the transmission parameter is based on a default rule or a message from the network device. In some embodiments, the transmission start time 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 parameter. In some embodiments, the default transmission parameter indicated by the message from the network device or determined by the default rule includes any one or more of the following: the lowest CORESETPoolIndex value, the highest CORESETPoolIndex value, the TAG with the lowest TAG ID or the highest TAG ID, the TCI state associated with the lowest TAG-ID or the highest TAG-ID, the TRP related indication with the lowest value or the highest value, the preconfigured value and / or the specific PCI.

[0145] In some embodiments, the method further includes the network device determining 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 the end of the uplink transmission associated with the first timing advance value, or from the 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 to a predetermined value set, or an index to an entry in a predetermined table. In some embodiments, the at least one reference signal includes at least one downlink reference signal.

[0146] In this document, the term "exemplary" is used to mean "an example of," and is not meant to imply an ideal or preferred embodiment unless otherwise stated.

[0147] Some embodiments described herein are described in the general context of methods or processes, which can be implemented in one embodiment by a computer program product contained in a computer-readable medium, including computer executable instructions, such as program codes, executed by a computer in a network 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 disc (CD), digital versatile disc (DVD), etc. Therefore, computer-readable media may include non-transitory storage media. Generally, program modules may include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. Computer or processor executable instructions, related data structures, and program modules represent examples of program codes for executing the method steps disclosed herein. Such a specific sequence of executable instructions or related data structures represents an example of corresponding actions for implementing the functions described in such steps or processes.

[0148] Some disclosed embodiments can be implemented as devices or modules using hardware circuits, software or a combination thereof. For example, a hardware circuit implementation can include discrete analog and / or digital components, which are, for example, integrated as a part of a printed circuit board. Alternatively or additionally, the disclosed components or modules can be implemented as application specific integrated circuits (Application Specific Integrated Circuit, ASIC) and / or field programmable gate arrays (Field Programmable Gate Array, FPGA) devices. Some embodiments can additionally or alternatively include a digital signal processor (Digital Signal Processor, DSP), which is a dedicated microprocessor with an optimized architecture for the operational requirements of digital signal processing associated with the functionality disclosed in the present application. Similarly, various components or subcomponents within each module can be implemented with software, hardware or firmware. The connection between the components within the module and / or the module can be provided using any connection method and medium known in the art, including but not limited to communicating via the Internet, wired or wireless networks using appropriate protocols.

[0149] Although this document contains many details, these details should not be interpreted as limitations on the scope of the claimed invention or the scope that may be claimed, but should be understood as descriptions of features peculiar to a particular embodiment. Certain features described in the context of a separate embodiment in this document may also be implemented in combination in a single embodiment. On the contrary, the various features described in the context of a single embodiment may also be implemented in multiple embodiments individually or in any suitable sub-combination. In addition, although the above-mentioned features may be described as working in certain combinations, and even initially claimed as such, one or more features from the claimed combination may be deleted from the combination in some cases, and the claimed combination may be for a sub-combination or a variant of a sub-combination. Similarly, although operations are described in a particular order in the accompanying drawings, this should not be understood as requiring that these operations be performed in the particular order shown or in a continuous order, or requiring that all the operations shown be performed to obtain the desired results.

[0150] Only a few implementations and examples are described, and other implementations, enhancements, and variations may be made based on what is described and illustrated in this disclosure.

Claims

1. A wireless communication method, comprising: The communication device receives at least one reference signal and a timing advance adjustment message in at least one radio time unit, The timing advance adjustment message indicates timing advance related information; as well as sending an uplink transmission in a second radio time unit in response to said receiving said at least one reference signal, The 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. 2 . The method according to claim 1 , wherein the start time of the second radio time unit is obtained by advancing the second radio time unit by 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 a transmission parameter that is the same as a transmission parameter associated with the at least one reference signal.

4. The method according to claim 1, wherein the at least one timing value of the at least one radio time unit is associated with the transmission parameter, which is different from another transmission parameter of another timing value of another radio time unit of the reference signal received.

5. The method according to any one of claims 3 or 4, wherein the transmission parameters include information for grouping 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, transmit-receive point TRP related information, a CORESET pool index, a power control parameter set, a TCI state index in a transmission configuration indicator TCI state code point, a wireless communication device capability value or a wireless communication device capability set.

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

7. The method according to claim 1, further comprising: receiving information indicating a plurality of TAGs or a plurality of TAG indexes and a plurality of transmission parameters, and The plurality of TAGs or the plurality of TAG indexes are associated with the plurality of transmission parameters based on an order of the plurality of TAGs or the plurality of TAG indexes indicated in the information.

8. The method according to claim 1, further comprising: receiving information indicating a plurality of TAGs or a plurality of TAG indexes and a plurality of transmission parameters, and The multiple TAGs or the multiple TAG indexes are associated with the multiple transmission parameters based on index values ​​of the multiple TAGs or the multiple TAG indexes.

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

10. The method of claim 9, wherein the transmission start time 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 method according to claim 10, wherein 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: Minimum CORESETPool Index value, The highest CORESETPool Index value, The TAG with the lowest TAG ID or the highest TAG ID, The TCI status associated with the lowest TAG ID or the highest TAG ID, TRP related indication with lowest or highest value, preconfigured transmission parameters, and / or PCI specific.

12. The method according to claim 1, wherein 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, wherein the uplink transmission and the second uplink transmission are scheduled or configured to be transmitted using the first transmission parameter, wherein the second transmission parameter is preconfigured or indicated by the network device, and The first transmission parameter is different from the second transmission parameter. 13 . The method according to claim 12 , wherein the first transmission parameter or the second transmission parameter comprises a sounding reference signal (SRS) resource set.

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

15. The method according to claim 1, further comprising: The communications device determines not to send a second uplink transmission associated with a second timing advance value within the time gap.

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

17. The method according to claim 15, 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 comprising 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.

18. The method of claim 1, further comprising: The communications device performs an operation in response to expiration of a timer associated with the TAG.

19. A wireless communication method, comprising: The network device sends at least one reference signal and a timing advance adjustment message in at least one radio time unit, The timing advance adjustment message indicates timing advance related information; as well as receiving an uplink transmission in a second radio time unit in response to sending the at least one reference signal, The 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.

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

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

22. The method of claim 19, wherein the at least one timing value of the at least one radio time unit is associated with the transmission parameter, the transmission parameter being different from another transmission parameter of another timing value of another radio time unit for which the reference signal is received.

23. A method according to any one of claims 21 or 22, wherein the transmission parameters include information for grouping 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, transmit-receive point TRP related information, a CORESET pool index, a power control parameter set, a transmission configuration indicator TCI state index, a wireless communication device capability value or a wireless communication device capability set.

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

25. The method of claim 19, further comprising: transmitting information indicating a plurality of TAGs or a plurality of TAG indexes and a plurality of transmission parameters, and The multiple TAGs or the multiple TAG indexes are associated with the multiple transmission parameters based on an order of the multiple TAGs or the multiple TAG indexes indicated in the information.

26. The method of claim 19, further comprising: transmitting information indicating a plurality of TAGs or a plurality of TAG indexes and a plurality of transmission parameters, and The multiple TAGs or the multiple TAG indexes are associated with the multiple transmission parameters based on index values ​​of the multiple TAGs or the multiple TAG indexes.

27. The method according to claim 19, wherein the network device schedules or configures the transmission of the uplink transmission for the communication device, wherein the transmission of the uplink transmission is not associated with a transmission parameter, and The association between the transmission of the uplink transmission and the transmission parameter is based on a default rule or a message from the network device.

28. The method of claim 27, wherein the transmission start time 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 a default transmission parameter.

29. The method of claim 28, wherein 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: Minimum CORESETPool Index value, The highest CORESETPool Index value, The TAG with the lowest TAG ID or the highest TAG ID, the TCI status associated with the lowest TAG ID or the highest TAG ID, TRP related indication with lowest or highest value, preconfigured transmission parameters, and / or PCI specific.

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

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

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

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