CN109788543B

CN109788543B - Method and device for determining uplink TA, storage medium and terminal

Info

Publication number: CN109788543B
Application number: CN201711115600.2A
Authority: CN
Inventors: 邓云; 顾祥新
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2017-11-13
Filing date: 2017-11-13
Publication date: 2020-10-09
Anticipated expiration: 2037-11-13
Also published as: CN109788543A

Abstract

A method and device for determining an uplink TA, a storage medium and a terminal are provided, the method comprises: receiving a TA (timing advance) adjusting command from a base station, and acquiring a TA adjusting value according to the TA adjusting command; determining the adjustment precision of the selected TA; determining a TA actual adjusting value according to the selected TA adjusting precision and the TA adjusting value; and determining the uplink TA according to the TA actual adjustment value. The scheme of the invention is beneficial to avoiding uplink transmission errors caused by adopting different TA adjustment precisions by the terminal and the base station, and reducing signaling overhead and saving wireless resources while meeting the adjustment requirement of the uplink TA.

Description

Method and device for determining uplink TA, storage medium and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for determining an uplink TA, a storage medium, and a terminal.

Background

In the existing LTE technology, in order to ensure time synchronization of receiving an Uplink signal by a receiving side (base station side), an Uplink Timing Advance (UL TA) mechanism is adopted.

When a terminal (User Equipment, UE) initially accesses a network, a random access procedure needs to be initiated, and in the random access process, the terminal obtains an uplink timing advance value. Afterwards, due to the movement of the UE, the base station may need to adjust the uplink Timing Advance value of the UE, and if the terminal receives a TA Adjustment Command (TAC) from the base station, the terminal needs to adjust the currently adopted uplink TA, so that the time when signals from different terminals in the same subframe (or timeslot) but in different frequency domain resources (e.g. different resource blocks) reach the base station are substantially aligned.

In the existing method for adjusting the uplink TA, the terminal obtains a TA adjustment value sent by the base station according to the TA adjustment command, determines an actual TA adjustment value according to a product of a default TA adjustment precision and the TA adjustment value, and then performs addition and subtraction operation on the actual TA adjustment value and the currently used uplink TA, thereby determining the uplink TA to be adjusted. In the LTE technology, only one subcarrier interval exists, so that only one TA adjustment accuracy, that is, the TA adjustment accuracy is the default.

However, in the 5G technology, there are multiple subcarrier intervals, that is, there are multiple optional TA adjustment accuracies, and the terminal determines that there is ambiguity in the actual TA adjustment value using which TA adjustment accuracy, which may cause uplink transmission error if the actual TA adjustment value is inconsistent with the expected TA adjustment value of the base station.

A method for determining an uplink TA amount is needed to enable a terminal to determine a proper TA adjustment accuracy, which is helpful for avoiding uplink transmission errors caused by different TA adjustment accuracies adopted by the terminal and a base station, and reducing signaling overhead and saving radio resources while meeting the adjustment requirement of the uplink TA.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a method and an apparatus for determining an uplink TA, a storage medium, and a terminal, which are helpful for avoiding uplink transmission errors caused by different TA adjustment accuracies adopted by the terminal and a base station, and reducing signaling overhead and saving radio resources while satisfying the adjustment requirement of the uplink TA.

To solve the foregoing technical problem, an embodiment of the present invention provides a method for determining an uplink TA, including the following steps: receiving a TA (timing advance) adjusting command from a base station, and acquiring a TA adjusting value according to the TA adjusting command; determining the adjustment precision of the selected TA; determining a TA actual adjusting value according to the selected TA adjusting precision and the TA adjusting value; and determining the uplink TA according to the TA actual adjustment value.

Optionally, the determining the selected TA adjustment precision includes: determining a target subcarrier interval according to the activation state of each subband of a serving cell; and determining the TA adjusting precision corresponding to the target subcarrier interval as the selected TA adjusting precision.

Optionally, the determining the target subcarrier spacing according to the activation state of each subband of the serving cell includes: determining a currently activated sub-band; if only one currently activated subband exists, determining the uplink subcarrier interval and the downlink subcarrier interval of the currently activated subband; and determining the larger subcarrier interval in the uplink subcarrier interval and the downlink subcarrier interval of the currently activated subband as the target subcarrier interval.

Optionally, the determining the target subcarrier spacing according to the activation state of each subband of the serving cell includes: determining a currently activated sub-band; if only one currently activated subband exists, determining the uplink subcarrier interval of the currently activated subband; and determining the uplink subcarrier interval of the currently activated subband as the target subcarrier interval.

Optionally, the determining the target subcarrier spacing according to the activation state of each subband of the serving cell includes: determining a currently activated sub-band; if the number of currently activated sub-bands is multiple, respectively determining the uplink sub-carrier interval and the downlink sub-carrier interval corresponding to each currently activated sub-band; determining the uplink subcarrier interval corresponding to each currently activated subband and the larger subcarrier interval in the downlink subcarrier intervals; determining the larger subcarrier spacing as the target subcarrier spacing.

Optionally, the determining the target subcarrier spacing according to the activation state of each subband of the serving cell includes: determining a currently activated sub-band; if the number of the currently activated sub-bands is multiple, respectively determining the uplink sub-carrier interval corresponding to each currently activated sub-band; determining a larger uplink subcarrier interval in the uplink subcarrier intervals corresponding to each currently activated subband; and determining the larger uplink subcarrier interval as the target subcarrier interval.

Optionally, the determining the target subcarrier spacing according to the activation state of each subband of the serving cell includes: determining an initially activated sub-band; determining an uplink subcarrier interval and a downlink subcarrier interval corresponding to the initially activated subband; and determining the larger subcarrier interval in the uplink subcarrier interval and the downlink subcarrier interval of the initially activated subband as the target subcarrier interval.

Optionally, the determining the target subcarrier spacing according to the activation state of each subband of the serving cell includes: determining an initially activated sub-band; determining an uplink subcarrier interval corresponding to the initially activated subband; and determining the uplink subcarrier interval of the initially activated subband as the target subcarrier interval.

Optionally, the determining the selected TA adjustment precision includes: determining an uplink subcarrier interval and a downlink subcarrier interval corresponding to a preset subband; determining the larger subcarrier interval in the uplink subcarrier interval and the downlink subcarrier interval corresponding to the preset subband as a target subcarrier interval; and determining the TA adjusting precision corresponding to the target subcarrier interval as the selected TA adjusting precision.

Optionally, the determining the selected TA adjustment precision includes: determining an uplink subcarrier interval corresponding to a preset subband; determining the uplink subcarrier interval corresponding to the preset subband as a target subcarrier interval; and determining the TA adjusting precision corresponding to the target subcarrier interval as the selected TA adjusting precision.

Optionally, the determining the selected TA adjustment precision includes: determining a receiving sub-band receiving the TA adjusting command; determining an uplink subcarrier interval and a downlink subcarrier interval corresponding to the receiving subband; determining the larger subcarrier interval in the uplink subcarrier interval and the downlink subcarrier interval corresponding to the receiving subband as a target subcarrier interval; and determining the TA adjusting precision corresponding to the target subcarrier interval as the selected TA adjusting precision.

Optionally, the determining the selected TA adjustment precision includes: determining a receiving sub-band receiving the TA adjusting command; determining the uplink subcarrier interval corresponding to the receiving subband; determining the uplink subcarrier interval corresponding to the receiving subband as a target subcarrier interval; and determining the TA adjusting precision corresponding to the target subcarrier interval as the selected TA adjusting precision.

Optionally, the determining the selected TA adjustment precision includes: receiving a TA adjustment accuracy from the base station.

Optionally, the TA adjustment accuracy is received from the base station when the TA adjustment command is received.

To solve the foregoing technical problem, an embodiment of the present invention provides an apparatus for determining an uplink TA, including: the TA adjusting command receiving module is suitable for receiving a TA adjusting command from a base station and acquiring a TA adjusting value according to the TA adjusting command; the TA adjusting precision determining module is suitable for determining the selected TA adjusting precision; the TA actual adjustment value determining module is suitable for determining a TA actual adjustment value according to the selected TA adjustment precision and the TA adjustment value; and the uplink TA determining module is suitable for determining the uplink TA according to the TA actual adjusting value.

Optionally, the TA adjustment accuracy determining module includes: a target subcarrier interval determination unit adapted to determine a target subcarrier interval according to an activation state of each subband of a serving cell; and the TA adjusting precision determining unit is suitable for determining the TA adjusting precision corresponding to the target subcarrier interval as the selected TA adjusting precision.

Optionally, the target subcarrier spacing determining unit includes: a first current subband determining subunit adapted to determine a currently activated subband; a first uplink and downlink sub-carrier interval determining sub-unit, adapted to determine the uplink sub-carrier interval and the downlink sub-carrier interval of the currently activated sub-band when there is only one currently activated sub-band; and a first target subcarrier spacing determining subunit, adapted to determine a larger subcarrier spacing of the uplink subcarrier spacing and the downlink subcarrier spacing of the currently activated subband as the target subcarrier spacing.

Optionally, the target subcarrier spacing determining unit includes: a second current sub-band determining sub-unit adapted to determine a currently activated sub-band; a first uplink subcarrier spacing determining subunit, adapted to determine the uplink subcarrier spacing of the currently activated subband when there is only one currently activated subband; and a second target subcarrier spacing determining subunit, adapted to determine the uplink subcarrier spacing of the currently activated subband as the target subcarrier spacing.

Optionally, the target subcarrier spacing determining unit includes: a third current subband determining subunit adapted to determine a currently activated subband; a second uplink and downlink sub-carrier interval determining sub-unit, adapted to determine, when a plurality of currently activated sub-bands are present, an uplink sub-carrier interval and a downlink sub-carrier interval corresponding to each currently activated sub-band, respectively; a first larger sub-carrier interval determining sub-unit, adapted to determine an uplink sub-carrier interval corresponding to each currently activated sub-band and a larger sub-carrier interval in the downlink sub-carrier intervals; a third target subcarrier spacing determination subunit adapted to determine the larger subcarrier spacing as the target subcarrier spacing.

Optionally, the target subcarrier spacing determining unit includes: a fourth current subband determining subunit adapted to determine a currently activated subband; a second uplink sub-carrier interval determining sub-unit, adapted to determine, when a plurality of currently activated sub-bands are present, an uplink sub-carrier interval corresponding to each currently activated sub-band, respectively; a second larger subcarrier spacing determining subunit, adapted to determine a larger uplink subcarrier spacing in the uplink subcarrier spacing corresponding to each currently activated subband; a fourth target subcarrier spacing determining subunit, adapted to determine the larger uplink subcarrier spacing as the target subcarrier spacing.

Optionally, the target subcarrier spacing determining unit includes: a first initial subband determining subunit adapted to determine an initially activated subband; a third uplink and downlink sub-carrier interval determining sub-unit, adapted to determine an uplink sub-carrier interval and a downlink sub-carrier interval corresponding to the initially activated sub-band; a fifth target subcarrier spacing determining subunit, adapted to determine a larger subcarrier spacing of the uplink subcarrier spacing and the downlink subcarrier spacing of the initially activated subband as the target subcarrier spacing.

Optionally, the target subcarrier spacing determining unit includes: a second initial subband determining subunit adapted to determine an initially activated subband; a third uplink sub-carrier interval determining sub-unit, adapted to determine an uplink sub-carrier interval corresponding to the initially activated sub-band; a sixth target subcarrier spacing determining subunit, adapted to determine the uplink subcarrier spacing of the initially activated subband as the target subcarrier spacing.

Optionally, the TA adjustment accuracy determining module includes: the first uplink and downlink subcarrier interval determining unit is suitable for determining an uplink subcarrier interval and a downlink subcarrier interval corresponding to a preset subband; a first target subcarrier spacing determining unit, adapted to determine a larger subcarrier spacing of an uplink subcarrier spacing and a downlink subcarrier spacing corresponding to the preset subband as a target subcarrier spacing; and the first TA adjusting precision determining unit is suitable for determining the TA adjusting precision corresponding to the target subcarrier interval as the selected TA adjusting precision.

Optionally, the TA adjustment accuracy determining module includes: the first uplink subcarrier interval determining unit is suitable for determining the uplink subcarrier interval corresponding to the preset subband; a second target subcarrier interval determining unit, adapted to determine the uplink subcarrier interval corresponding to the preset subband as a target subcarrier interval; and the second TA adjusting precision determining unit is suitable for determining the TA adjusting precision corresponding to the target subcarrier interval as the selected TA adjusting precision.

Optionally, the TA adjustment accuracy determining module includes: a first receiving sub-band determining unit adapted to determine a receiving sub-band in which the TA adjustment command is received; a second uplink and downlink sub-carrier interval determining unit, adapted to determine an uplink sub-carrier interval and a downlink sub-carrier interval corresponding to the receiving sub-band; a third target subcarrier spacing determining unit, adapted to determine the larger subcarrier spacing of the uplink subcarrier spacing and the downlink subcarrier spacing corresponding to the receiving subband as a target subcarrier spacing; and a third TA adjustment accuracy determining unit, adapted to determine the TA adjustment accuracy corresponding to the target subcarrier interval as the selected TA adjustment accuracy.

Optionally, the TA adjustment accuracy determining module includes: a second receiving sub-band determining unit adapted to determine a receiving sub-band in which the TA adjustment command is received; a second uplink subcarrier interval determining unit, adapted to determine an uplink subcarrier interval corresponding to the receiving subband; a fourth target subcarrier spacing determining unit, adapted to determine the uplink subcarrier spacing corresponding to the receiving subband as a target subcarrier spacing; and the fourth TA adjustment accuracy determining unit is suitable for determining the TA adjustment accuracy corresponding to the target subcarrier interval as the selected TA adjustment accuracy.

Optionally, the TA adjustment accuracy determining module includes: a TA adjustment accuracy receiving unit adapted to receive TA adjustment accuracy from the base station.

To solve the foregoing technical problem, an embodiment of the present invention provides a storage medium, on which computer instructions are stored, and when the computer instructions are executed, the steps of the method for determining an uplink TA are executed.

In order to solve the foregoing technical problem, an embodiment of the present invention provides a terminal, including a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the method for determining an uplink TA when executing the computer instructions.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

in the embodiment of the invention, a TA adjusting command is received from a base station, and a TA adjusting value is obtained according to the TA adjusting command; determining the adjustment precision of the selected TA; determining a TA actual adjusting value according to the selected TA adjusting precision and the TA adjusting value; and determining the uplink TA according to the TA actual adjustment value. By adopting the scheme, the terminal adopts proper TA adjustment accuracy to determine the actual TA adjustment value through the step of determining the selected TA adjustment accuracy, and further determines the uplink TA quantity to be adjusted according to the actual TA adjustment value.

Further, in the embodiment of the present invention, the target subcarrier interval may be determined according to the currently activated subband, and further, the selected TA adjustment accuracy may be determined according to the TA adjustment accuracy corresponding to the target subcarrier interval. The TA adjusting precision is determined by adopting the subcarrier interval of the currently activated subband, the current actual situation of the terminal is better met, the thickness degree of the granularity is more suitable for adjusting, the requirement of adjusting the uplink TA is met, meanwhile, the signaling overhead is reduced, and the wireless resources are saved.

Further, in the embodiment of the present invention, for the case that the currently activated subband of the terminal in the serving cell is a single subband or multiple subbands, multiple methods are respectively used to determine the TA adjustment accuracy, which is helpful for the user to select and use according to the actual situation, thereby improving the convenience.

Drawings

Fig. 1 is a flowchart of a method for determining an uplink TA according to an embodiment of the present invention;

FIG. 2 is a flowchart of a first embodiment of step S12 of FIG. 1;

FIG. 3 is a flowchart of a first embodiment of step S21 of FIG. 2;

FIG. 4 is a flowchart of a second embodiment of step S21 of FIG. 2;

FIG. 5 is a flowchart of a third embodiment of step S21 of FIG. 2;

FIG. 6 is a flowchart of a fourth embodiment of step S21 of FIG. 2;

FIG. 7 is a flowchart of a fifth embodiment of step S21 of FIG. 2;

FIG. 8 is a flowchart of a sixth embodiment of step S21 of FIG. 2;

FIG. 9 is a flowchart of a second embodiment of step S12 of FIG. 1;

FIG. 10 is a flowchart of a third embodiment of step S12 of FIG. 1;

FIG. 11 is a flowchart of a fourth embodiment of step S12 of FIG. 1;

FIG. 12 is a flow chart of a fifth embodiment of step S12 of FIG. 1;

fig. 13 is a schematic structural diagram of an uplink TA determination apparatus in an embodiment of the present invention;

fig. 14 is a schematic structural diagram of a first specific implementation of the TA adjustment accuracy determining module 132 in fig. 13;

fig. 15 is a schematic structural diagram of a first specific embodiment of the target subcarrier spacing determination unit 141 in fig. 14;

fig. 16 is a schematic structural diagram of a second specific embodiment of the target subcarrier spacing determination unit 141 in fig. 14;

fig. 17 is a schematic structural diagram of a third specific embodiment of the target subcarrier spacing determination unit 141 in fig. 14;

fig. 18 is a schematic structural diagram of a fourth specific embodiment of the target subcarrier spacing determination unit 141 in fig. 14;

fig. 19 is a schematic structural diagram of a fifth specific embodiment of the target subcarrier spacing determination unit 141 in fig. 14;

fig. 20 is a schematic structural diagram of a sixth specific embodiment of the target subcarrier spacing determination unit 141 in fig. 14;

fig. 21 is a schematic structural diagram of a second embodiment of the TA adjustment accuracy determining module 132 in fig. 13;

fig. 22 is a schematic structural diagram of a third specific implementation of the TA adjustment accuracy determining module 132 in fig. 13;

fig. 23 is a schematic structural diagram of a fourth embodiment of the TA adjustment accuracy determining module 132 in fig. 13;

fig. 24 is a schematic structural diagram of a fifth specific implementation of the TA adjustment accuracy determining module 132 in fig. 13.

Detailed Description

In the existing uplink transmission technology, an important feature is that different terminals are Orthogonal Multiple Access (Orthogonal Multiple Access) in time and frequency, that is, uplink transmissions from different terminals in the same cell do not interfere with each other.

The base station requires that the time of arrival of the signals of different terminals from the same subframe (or slot) but different frequency domain resources (different resource blocks) at the base station are substantially aligned. Specifically, the base station can correctly decode the uplink data as long as receiving the uplink data sent by the terminal within the Cyclic Prefix (CP) range, and therefore, in order to ensure the orthogonality of uplink transmission and avoid Intra-cell (Intra-cell) interference, the uplink synchronization requires that the time when signals from different terminals in the same subframe reach the base station falls within the CP.

In order to ensure time synchronization on the receiving side (e.g., the base station side), an uplink timing advance mechanism is adopted in the conventional LTE technology. Specifically, the TA may be regarded as a Negative Offset (Negative Offset) between the start time of receiving the downlink subframe and the time of transmitting the uplink subframe. The base station can control the arrival time of uplink signals from different terminals at the base station by appropriately controlling the negative offset of each terminal. For a terminal farther from the base station, due to a larger transmission delay, uplink data is transmitted earlier than for a terminal closer to the base station.

In a New Radio (NR), i.e., 5G technology, a serving cell may include multiple Subbands (BWPs), which may also be referred to as Bandwidth parts. Each subband may include a portion for uplink data transmission (e.g., may be referred to as an uplink subband) and a portion for downlink data transmission (e.g., may be referred to as a downlink subband).

Further, each uplink subband corresponds to a kind of mathematical parameter (Numerology), each downlink subband corresponds to a kind of mathematical parameter, and the mathematical parameters corresponding to the uplink subband and the downlink subband may be the same or different.

Further, each mathematical parameter corresponds to a Subcarrier Spacing (Subcarrier Spacing) and a corresponding CP length. Specifically, in 5G, one cell may support different subcarrier spacings (e.g., 15KHz, 30KHz, 60KHz, 120KHz, etc.), and the subcarrier spacings may be recorded in the mathematical parameters of each uplink subband and downlink subband.

For a serving cell, there is usually a sub-band to allow idle UE to camp on, and the base station transmits System Information (SI) and paging messages on the sub-band.

The example is described in which one serving cell includes 4 sub-bands (BWP0 to BWP 3). For an idle terminal, the base station may transmit a synchronization signal and a physical broadcast channel on BWP0, and simultaneously transmit a system message (SI) and a paging message on BWP0, and the idle terminal may reside on the subband (or reside on the serving cell via the subband).

Further, when the terminal in idle state enters connected state, the terminal successfully accesses BWP0 through random access procedure, and BWP0 becomes the initial active sub-band of the terminal. The base station may configure different sub-bands for the terminal according to the capability of the terminal and the service requirement, for example, configure parameters of BWP1 and BWP2, and the base station may send parameters of the sub-bands, such as bandwidth, frequency location, and subcarrier spacing, to the terminal through Radio Resource Control (RRC) connection reconfiguration signaling. So that some terminals can only have one active sub-band (including the uplink sub-band and the downlink sub-band) and some terminals can have multiple active sub-bands.

In the 5G technique, the adjustment value of TA is closely related to the subcarrier spacing. The latest 3GPP sets different TA adjustment accuracies for different subcarrier spacings (without excluding that the adjustment accuracy will be modified later), as described in table 1.

Subcarrier spacing (kHz)	TA tuning accuracy (Ts)
		15	16x64
30	8x64
		60	4x64
120	2x64

TABLE 1

In table 1, the subcarrier spacing is used to indicate a subcarrier spacing of a First Uplink Transmission (First Uplink Transmission) after a Random Access Response (RAR).

Wherein the TA adjusting precision unit is time unit Ts, T_s1/(15000 × 2048) seconds.

However, in the 5G technology, for a terminal in a connected state, the base station may configure multiple subbands, which may cause the base station to adjust TA when the terminal moves. After the base station sends the TA adjustment value to the terminal, the terminal determines that the actual TA adjustment value is fuzzy according to which TA adjustment precision is adopted, and uplink transmission errors can be caused if the actual TA adjustment value is inconsistent with the expected TA adjustment value of the base station.

The inventor of the present invention has found, through research, that in the 5G technology, if the method in the LTE technology is used, and the same default TA adjustment accuracy is adopted in any case, it is difficult to meet the adjustment requirement of the uplink TA. Specifically, the smaller TA adjustment precision may cause the adjustment granularity to be too fine, and the TA adjustment value that the base station needs to send to the terminal is too large, thereby causing too many bits to be occupied by the TA adjustment command, too high signaling overhead, and wasting wireless resources; the adoption of a large TA adjustment precision may cause that the adjustment particles are too coarse, the terminal is difficult to realize fine adjustment, and the terminal is difficult to be adjusted in place.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Referring to fig. 1, fig. 1 is a flowchart of a method for determining an uplink TA in an embodiment of the present invention. The method for determining the uplink TA may include steps S11 to S14:

step S11: receiving a TA (timing advance) adjusting command from a base station, and acquiring a TA adjusting value according to the TA adjusting command;

step S12: determining the adjustment precision of the selected TA;

step S13: determining a TA actual adjusting value according to the selected TA adjusting precision and the TA adjusting value;

step S14: and determining the uplink TA according to the TA actual adjustment value.

In step S11, in a specific implementation, the terminal receives a TA adjustment command from the base station, and obtains a TA adjustment value according to the TA adjustment command.

Specifically, the TA adjustment command may be sent by the base station to the terminal through a Medium Access Control (MAC) cell. In the embodiment of the present invention, a specific implementation manner of receiving the TA adjustment command and acquiring the TA adjustment value by the terminal is not limited.

In the implementation of step S12, the step of determining the selected TA adjustment accuracy by the terminal may have various implementations.

Fig. 2 is a flowchart of a first specific implementation of step S12 in fig. 1, and the step of determining the selected TA adjustment accuracy may include steps S21 to S22:

step S21: determining a target subcarrier interval according to the activation state of each subband of a serving cell;

step S22: and determining the TA adjusting precision corresponding to the target subcarrier interval as the selected TA adjusting precision.

In the implementation of step S21, the terminal may determine the target subcarrier spacing according to the activation status of each subband of the serving cell in various embodiments. In this embodiment, only a scenario that the terminal has only one serving cell is considered, and a plurality of subbands all belong to the serving cell.

Referring to the first embodiment of step S21 in fig. 2 shown in fig. 3, the step of determining the target subcarrier spacing according to the activation state of each subband of the serving cell may include steps S31 to S33, and the respective steps are explained below.

In step S31, the terminal determines the currently activated sub-band.

Specifically, initially, the terminal performs uplink and downlink data transmission at BWP0, and therefore, the TA adjustment precision corresponding to BWP0 is adopted, that is, the currently activated subband is BWP 0.

When the terminal receives Downlink Control Information (DCI) and needs to switch from BWP0 to BWP1, the terminal adjusts its radio frequency receiving/transmitting bandwidth to BWP1, and then needs to transmit/receive data to/from the base station through BWP 1. It should be noted that the step of the terminal adjusting its radio frequency receiving bandwidth/transmitting bandwidth requires a certain time duration, for example, a time interval such as several symbols (Symbol).

When the terminal sends and receives data to and from the base station through BWP1, the terminal needs to adopt TA adjustment accuracy corresponding to BWP1, that is, the currently activated subband is BWP 1.

In step S32, if there is only one currently activated subband, the uplink subcarrier spacing and the downlink subcarrier spacing of the currently activated subband are determined.

Specifically, the uplink subcarrier spacing may be obtained according to the mathematical parameters of the uplink subband of the currently activated subband, and the downlink subcarrier spacing may be obtained according to the mathematical parameters of the downlink subband of the currently activated subband.

In step S33, the larger subcarrier spacing of the uplink subcarrier spacing and the downlink subcarrier spacing of the currently activated subband is determined as the target subcarrier spacing.

Specifically, for the case where the uplink subcarrier spacing and the downlink subcarrier spacing of the currently activated subband are different, the larger value of the two may be used as the target subcarrier spacing.

It can be understood that, for the case that the uplink subcarrier spacing of the currently activated subband is the same as the downlink subcarrier spacing, the same subcarrier spacing may be directly adopted as the target subcarrier spacing.

Referring to the second specific embodiment of step S21 in fig. 2 shown in fig. 4, the step of determining the target subcarrier spacing according to the activation state of each subband of the serving cell may include steps S41 to S43, and the respective steps are explained below.

In step S41, the terminal determines the currently activated sub-band.

In step S42, if there is only one currently activated subband, the uplink subcarrier spacing of the currently activated subband is determined.

In step S43, the uplink subcarrier spacing of the currently activated subband is determined as the target subcarrier spacing.

Specifically, for the case where the uplink subcarrier spacing of the currently activated subband is different from the downlink subcarrier spacing, the uplink subcarrier spacing may be adopted as the target subcarrier spacing. Since the uplink TA is used for uplink transmission of the terminal, compared with the downlink subcarrier spacing, the uplink subcarrier spacing is more suitable for the current actual situation of the terminal.

In a specific implementation, please refer to the description of the steps in fig. 3 for further details regarding the method for determining the uplink TA shown in fig. 4, which is not described herein again.

Fig. 5 is a flowchart of a third embodiment of step S21 in fig. 2. The step of determining the target subcarrier spacing according to the activation state of each subband of the serving cell may include steps S51 to S54, which are explained below.

In step S51, the terminal determines the currently activated sub-band.

In step S52, if there are multiple currently activated subbands, the uplink subcarrier spacing and the downlink subcarrier spacing corresponding to each currently activated subband are determined respectively.

Specifically, initially, the terminal performs uplink and downlink data transmission at BWP0, that is, the terminal has only one active BWP 0. Then, the base station activates multiple sub-bands, such as BWP1 and BWP2, again through DCI, and then the terminal has 3 activated sub-bands. And further respectively determining uplink subcarrier intervals and downlink subcarrier intervals corresponding to the 3 activated subbands.

In step S53, the uplink subcarrier spacing and the larger subcarrier spacing in the downlink subcarrier spacing corresponding to each currently activated subband are determined.

Specifically, after determining the uplink subcarrier spacing and the downlink subcarrier spacing corresponding to a plurality of currently activated subbands, if different values of subcarrier spacing exist in the plurality of uplink subcarrier spacings and the plurality of downlink subcarrier spacings, a maximum value may be determined, where the uplink subcarrier spacing or the downlink subcarrier spacing corresponding to the maximum value is a larger subcarrier spacing.

In step S54, the larger subcarrier spacing is determined as the target subcarrier spacing.

In a specific implementation, please refer to the description of the steps in fig. 3 to 4 for further details of the method for determining an uplink TA shown in fig. 5, which will not be described herein again.

Fig. 6 is a flowchart of a fourth embodiment of step S21 in fig. 2, and the step of determining the target subcarrier spacing according to the activation state of each subband of the serving cell may include steps S61 to S64, which are described below.

In step S61, the terminal determines the currently activated sub-band.

In step S62, if there are multiple currently activated subbands, the uplink subcarrier spacing corresponding to each currently activated subband is determined.

In step S63, the larger uplink subcarrier spacing in the uplink subcarrier spacing corresponding to each currently activated subband is determined.

Specifically, after determining the uplink subcarrier spacing corresponding to the plurality of currently activated subbands, if different values of subcarrier spacing exist in the plurality of uplink subcarrier spacings, a maximum value may be determined, where the uplink subcarrier spacing corresponding to the maximum value is a larger uplink subcarrier spacing.

In step S64, the larger uplink subcarrier spacing is determined as the target subcarrier spacing.

In a specific implementation, please refer to the description of the steps in fig. 3 to fig. 5 for further details of the method for determining an uplink TA shown in fig. 6, which is not described herein again.

In the specific embodiments shown in fig. 3 to fig. 6, the target subcarrier spacing is determined according to the currently activated subband, and then the TA adjustment precision corresponding to the target subcarrier spacing is determined as the selected TA adjustment precision in the subsequent step. The TA adjusting precision is determined by adopting the subcarrier interval of the currently activated subband, the current actual situation of the terminal is better met, the thickness degree of the granularity is more suitable for adjusting, the requirement of adjusting the uplink TA is met, meanwhile, the signaling overhead is reduced, and the wireless resources are saved.

Fig. 7 is a flowchart of a fifth specific implementation of step S21 in fig. 2, where the step of determining the target subcarrier spacing according to the activation state of each subband of the serving cell may include steps S71 to S73, and the steps are described below.

In step S71, the terminal determines the initially activated sub-band.

In step S72, the uplink subcarrier spacing and the downlink subcarrier spacing corresponding to the initially activated subband are determined.

In step S73, the larger subcarrier spacing of the uplink subcarrier spacing and the downlink subcarrier spacing of the initially activated subband is determined as the target subcarrier spacing.

Fig. 8 is a flowchart of a sixth specific implementation of step S21 in fig. 2, where the step of determining the target subcarrier spacing according to the activation state of each subband of the serving cell may include steps S81 to S83, and the steps are described below.

In step S81, the terminal determines the initially activated sub-band.

In step S82, the uplink subcarrier spacing corresponding to the initially activated subband is determined.

In step S83, the uplink subcarrier spacing of the initially activated subband is determined as the target subcarrier spacing.

In a specific implementation, please refer to the description of the steps in fig. 3 to 6 for further details regarding the method for determining the uplink TA shown in fig. 7 and 8, which are not described herein again.

In the specific embodiments shown in fig. 7 and fig. 8, the target subcarrier spacing is determined according to the initially activated subband, and then the TA adjustment accuracy corresponding to the target subcarrier spacing is determined as the selected TA adjustment accuracy in the subsequent step. The TA adjustment precision is determined by adopting the initially activated sub-band, so that the confirmation times of confirming the target sub-carrier interval are reduced, and the calculation amount is reduced.

With continued reference to fig. 2, in a specific implementation of step S22, the TA adjustment precision corresponding to the target subcarrier spacing is determined as the selected TA adjustment precision.

In the embodiment of the invention, aiming at the condition that the currently activated subband of the terminal is a single subband or a plurality of subbands, the target subcarrier interval is determined by adopting a plurality of methods respectively, and the TA adjusting precision is determined according to the target subcarrier interval, so that the method is beneficial to a user to select and adopt according to the actual condition, and the convenience is improved.

With continued reference to fig. 1, in the implementation of step S12, the step of determining the selected TA adjustment accuracy by the terminal may also have the following various implementations.

Fig. 9 is a flowchart of a second embodiment of step S12 in fig. 1, and the step of determining the adjustment accuracy of the selected TA by the terminal may include steps S91 to S93, which are described below.

In step S91, the terminal determines an uplink subcarrier interval and a downlink subcarrier interval corresponding to a preset subband.

Specifically, the preset subband (Default BWP) may be a preset Default subband, for example, a certain subband is set as the preset subband by the base station to the terminal through RRC signaling, or the preset subband is a subband when the terminal initially accesses the cell.

In step S92, the larger subcarrier spacing of the uplink subcarrier spacing and the downlink subcarrier spacing corresponding to the preset subband is determined as the target subcarrier spacing.

In step S93, the TA adjustment accuracy corresponding to the target subcarrier spacing is determined as the selected TA adjustment accuracy.

Fig. 10 is a flowchart of a third specific implementation of step S12 in fig. 1, and the step of determining the adjustment accuracy of the selected TA by the terminal may include steps S101 to S103, which are described below.

In step S101, the terminal determines an uplink subcarrier interval corresponding to a preset subband.

In step S102, the uplink subcarrier spacing corresponding to the preset subband is determined as a target subcarrier spacing.

In step S103, the TA adjustment accuracy corresponding to the target subcarrier interval is determined as the selected TA adjustment accuracy.

In a specific implementation, please refer to the description of the steps in fig. 3 to 8 for further details regarding the method for determining the uplink TA shown in fig. 9 and 10, which will not be described herein again.

In the specific embodiments shown in fig. 9 and fig. 10, the target subcarrier spacing is determined according to the preset subband, and then the TA adjustment precision corresponding to the target subcarrier spacing is determined as the selected TA adjustment precision in the subsequent step. The TA adjustment precision is determined by adopting the preset sub-band, which is beneficial to reducing the confirmation times of confirming the target sub-carrier interval and reducing the calculation amount.

Fig. 11 is a flowchart of a fourth specific embodiment of step S12 in fig. 1, and the step of determining the adjustment accuracy of the selected TA by the terminal may include step S111 to step S114, which are described below.

In step S111, the terminal determines the receiving subband in which the TA adjustment command is received.

Specifically, according to which sub-band receives the TA adjustment command, the terminal and the base station can uniquely determine the sub-band, thereby avoiding that different TA adjustment accuracies are adopted due to the fact that the terminal and the base station determine different sub-bands.

In step S112, the uplink subcarrier spacing and the downlink subcarrier spacing corresponding to the receiving subband are determined.

In step S113, the larger subcarrier spacing of the uplink subcarrier spacing and the downlink subcarrier spacing corresponding to the receiving subband is determined as the target subcarrier spacing.

In step S114, the TA adjustment accuracy corresponding to the target subcarrier interval is determined as the selected TA adjustment accuracy.

Fig. 12 is a flowchart of a fifth embodiment of step S12 in fig. 1, and the step of determining the adjustment accuracy of the selected TA by the terminal may include step S121 to step S124, which are described below.

In step S121, the terminal determines a receiving subband in which the TA adjustment command is received.

In step S122, an uplink subcarrier spacing corresponding to the receiving subband is determined.

In step S123, the uplink subcarrier spacing corresponding to the receiving subband is determined as a target subcarrier spacing.

In step S124, the TA adjustment accuracy corresponding to the target subcarrier interval is determined as the selected TA adjustment accuracy.

In the specific implementation, please refer to the description of the steps in fig. 3 to 10 for further details regarding the method for determining the uplink TA shown in fig. 11 and 12, which will not be described herein again.

In the specific embodiments shown in fig. 11 and 12, the target subcarrier spacing is determined according to the receiving subband, and then the TA adjustment accuracy corresponding to the target subcarrier spacing is determined as the selected TA adjustment accuracy in the subsequent step. The method and the device have the advantages that the TA adjustment accuracy is determined by adopting the receiving sub-band, so that the terminal and the base station can uniquely determine the sub-band, and the condition that different TA adjustment accuracies are adopted due to the fact that the terminal and the base station are determined to be different sub-bands is avoided.

In a specific implementation, the step of determining, by the terminal, the adjustment accuracy of the selected TA may further include: receiving a TA adjustment accuracy from the base station.

Specifically, when the base station configures a plurality of subbands for the terminal, a specific TA adjustment accuracy may be specified, and the specific TA adjustment accuracy is adopted regardless of which subband the terminal adopts to transmit and receive data to and from the base station. If the base station simultaneously specifies a specific TA adjustment accuracy when configuring a plurality of sub-bands, RRC signaling is used for specification.

Further, the terminal may receive the TA adjustment accuracy from the base station when receiving the TA adjustment command.

Specifically, when the base station sends the TA adjustment command to the terminal to instruct the TA adjustment value, the base station may instruct the TA adjustment accuracy corresponding to the TA adjustment value at the same time, and for example, 00 may be set to indicate the TA adjustment accuracy corresponding to the 15KHz subcarrier spacing, 01 may indicate the TA adjustment accuracy corresponding to the 30KHz subcarrier spacing, 10 may indicate the TA adjustment accuracy corresponding to the 60KHz subcarrier spacing, and 11 may indicate the TA adjustment accuracy corresponding to the 120KHz subcarrier spacing in a binary representation.

With continued reference to fig. 1, in an implementation of step S13, an actual TA adjustment value is determined according to the selected TA adjustment precision and the TA adjustment value.

Specifically, the TA adjustment value sent by the base station to the terminal may be represented by a binary value, for example, 100, and then the terminal may obtain the actual TA adjustment value by multiplying the selected TA adjustment precision by 100.

In a specific implementation of step S14, the uplink TA is determined according to the TA actual adjustment value.

Specifically, the terminal may perform addition and subtraction operation on the actual TA adjustment value and the currently used uplink TA, so as to determine the uplink TA to be adjusted.

It should be noted that, in the embodiment of the present invention, a specific implementation manner of determining the TA actual adjustment value and determining the uplink TA by the terminal is not limited.

In the embodiment of the invention, the terminal adopts proper TA adjustment accuracy to determine the actual TA adjustment value by the step of determining the selected TA adjustment accuracy, and further determines the uplink TA quantity to be adjusted according to the actual TA adjustment value.

Referring to fig. 13, fig. 13 is a schematic structural diagram of an uplink TA determination apparatus in an embodiment of the present invention. The apparatus for determining the uplink TA may include:

a TA adjustment command receiving module 131, adapted to receive a TA adjustment command from a base station, and obtain a TA adjustment value according to the TA adjustment command;

a TA adjustment accuracy determining module 132 adapted to determine a selected TA adjustment accuracy;

a TA actual adjustment value determining module 133, adapted to determine a TA actual adjustment value according to the selected TA adjustment precision and the TA adjustment value;

an uplink TA determining module 134, adapted to determine the uplink TA according to the TA actual adjustment value.

Fig. 14 is a schematic structural diagram of a first specific implementation of the TA adjustment precision determining module 132 in fig. 13, where the TA adjustment precision determining module 132 may include:

a target subcarrier interval determination unit 141 adapted to determine a target subcarrier interval according to an activation state of each subband of the serving cell;

a TA adjustment accuracy determining unit 142, adapted to determine the TA adjustment accuracy corresponding to the target subcarrier interval as the selected TA adjustment accuracy.

Further, fig. 15 is a schematic structural diagram of the first specific implementation of the target subcarrier spacing determining unit 141 in fig. 14, where the target subcarrier spacing determining unit 141 may include:

a first current sub-band determining subunit 151 adapted to determine a currently activated sub-band;

a first uplink/downlink subcarrier spacing determining subunit 152, adapted to determine, when there is only one currently activated subband, an uplink subcarrier spacing and a downlink subcarrier spacing of the currently activated subband;

a first target subcarrier spacing determining subunit 153, adapted to determine the larger subcarrier spacing of the uplink subcarrier spacing and the downlink subcarrier spacing of the currently activated subband as the target subcarrier spacing.

Fig. 16 is a schematic structural diagram of a second specific implementation of the target subcarrier spacing determining unit 141 in fig. 14, where the target subcarrier spacing determining unit 141 may include:

a second current sub-band determining sub-unit 161 adapted to determine a currently activated sub-band;

a first uplink subcarrier spacing determination subunit 162 adapted to determine, when there is only one currently activated subband, an uplink subcarrier spacing of the currently activated subband;

a second target subcarrier spacing determining subunit 163, adapted to determine the uplink subcarrier spacing of the currently activated subband as the target subcarrier spacing.

Fig. 17 is a schematic structural diagram of a third specific embodiment of the target subcarrier spacing determination unit 141 in fig. 14, where the target subcarrier spacing determination unit 141 may include:

a third current sub-band determining subunit 171 adapted to determine a currently activated sub-band;

a second uplink/downlink subcarrier interval determining subunit 172, adapted to determine, when a plurality of currently activated subbands are present, an uplink subcarrier interval and a downlink subcarrier interval corresponding to each currently activated subband respectively;

a first larger sub-carrier interval determining subunit 173 adapted to determine the uplink sub-carrier interval corresponding to each currently activated sub-band and the larger sub-carrier interval in the downlink sub-carrier intervals

A third target subcarrier spacing determination subunit 174 adapted to determine the larger subcarrier spacing as the target subcarrier spacing.

Fig. 18 is a schematic structural diagram of a fourth specific embodiment of the target subcarrier spacing determination unit 141 in fig. 14, where the target subcarrier spacing determination unit 141 may include:

a fourth current sub-band determining sub-unit 181 adapted to determine a currently activated sub-band;

a second uplink sub-carrier interval determining sub-unit 182, adapted to determine, when there are multiple currently activated sub-bands, an uplink sub-carrier interval corresponding to each currently activated sub-band, respectively;

a second larger sub-carrier interval determining sub-unit 183 adapted to determine a larger uplink sub-carrier interval in the uplink sub-carrier intervals corresponding to each currently activated sub-band

A fourth target subcarrier spacing determining subunit 184, adapted to determine the larger uplink subcarrier spacing as the target subcarrier spacing.

Fig. 19 is a schematic structural diagram of a fifth specific implementation of the target subcarrier spacing determining unit 141 in fig. 14, where the target subcarrier spacing determining unit 141 may include:

a first initial subband determining subunit 191 adapted to determine an initially activated subband;

a third uplink and downlink subcarrier interval determining subunit 192, adapted to determine an uplink subcarrier interval and a downlink subcarrier interval corresponding to the initially activated subband;

a fifth target subcarrier spacing determining subunit 193 is adapted to determine the larger subcarrier spacing of the uplink subcarrier spacing and the downlink subcarrier spacing of the initially activated subband as the target subcarrier spacing.

Fig. 20 is a schematic structural diagram of a sixth specific implementation of the target subcarrier spacing determining unit 141 in fig. 14, where the target subcarrier spacing determining unit 141 may include:

a second initial subband determining subunit 201 adapted to determine an initially activated subband;

a third uplink subcarrier interval determining subunit 202, adapted to determine an uplink subcarrier interval corresponding to the initially activated subband;

a sixth target subcarrier spacing determining subunit 203, adapted to determine the uplink subcarrier spacing of the initially activated subband as the target subcarrier spacing.

Fig. 21 is a schematic structural diagram of a second specific implementation of the TA adjustment precision determining module 132 in fig. 13, where the TA adjustment precision determining module 132 may include:

a first uplink and downlink subcarrier interval determining unit 211, adapted to determine an uplink subcarrier interval and a downlink subcarrier interval corresponding to a preset subband;

a first target subcarrier spacing determining unit 212, adapted to determine the larger subcarrier spacing of the uplink subcarrier spacing and the downlink subcarrier spacing corresponding to the preset subband as a target subcarrier spacing;

the first TA adjustment accuracy determining unit 213 is adapted to determine the TA adjustment accuracy corresponding to the target subcarrier interval as the selected TA adjustment accuracy.

Fig. 22 is a schematic structural diagram of a third specific implementation of the TA adjustment precision determining module 132 in fig. 13, where the TA adjustment precision determining module 132 may include:

a first uplink subcarrier interval determining unit 221, adapted to determine an uplink subcarrier interval corresponding to a preset subband;

a second target subcarrier spacing determining unit 222, adapted to determine the uplink subcarrier spacing corresponding to the preset subband as a target subcarrier spacing;

the second TA adjustment accuracy determining unit 223 is adapted to determine the TA adjustment accuracy corresponding to the target subcarrier interval as the selected TA adjustment accuracy.

Fig. 23 is a schematic structural diagram of a fourth specific implementation of the TA adjustment precision determining module 132 in fig. 13, where the TA adjustment precision determining module 132 may include:

a first receiving subband determining unit 231 adapted to determine a receiving subband in which the TA adjustment command is received;

a second uplink/downlink subcarrier spacing determining unit 232, adapted to determine an uplink subcarrier spacing and a downlink subcarrier spacing corresponding to the receiving subband;

a third target subcarrier spacing determining unit 233, adapted to determine the larger subcarrier spacing of the uplink subcarrier spacing and the downlink subcarrier spacing corresponding to the receiving subband as a target subcarrier spacing;

the third TA adjustment accuracy determining unit 234 is adapted to determine the TA adjustment accuracy corresponding to the target subcarrier interval as the selected TA adjustment accuracy.

Fig. 24 is a schematic structural diagram of a fifth specific implementation of the TA adjustment precision determining module 132 in fig. 13, where the TA adjustment precision determining module 132 may include:

a second receiving subband determining unit 241 adapted to determine a receiving subband in which the TA adjustment command is received;

a second uplink subcarrier spacing determining unit 242, adapted to determine an uplink subcarrier spacing corresponding to the receiving subband;

a fourth target subcarrier spacing determining unit 243, adapted to determine the uplink subcarrier spacing corresponding to the receiving subband as a target subcarrier spacing;

a fourth TA adjustment accuracy determining unit 244, adapted to determine the TA adjustment accuracy corresponding to the target subcarrier interval as the selected TA adjustment accuracy.

The TA adjustment accuracy determination module may include: a TA adjustment accuracy receiving unit adapted to receive TA adjustment accuracy from the base station.

Further, the TA adjustment accuracy is received from the base station upon receiving the TA adjustment command.

For the principle, specific implementation and beneficial effects of the uplink TA determination apparatus, please refer to the foregoing and the related descriptions of the uplink TA determination method shown in fig. 1 to 12, which are not described herein again.

The embodiment of the present invention further provides a storage medium, where a computer instruction is stored, and when the computer instruction runs, the steps of the method for determining an uplink TA are executed. The storage medium may be a computer readable storage medium, and may include, for example, optical disks, mechanical hard disks, solid state hard disks, and the like

The embodiment of the present invention further provides a terminal, which includes a memory and a processor, where the memory stores a computer instruction capable of running on the processor, and the processor executes the steps of the method for determining an uplink TA when running the computer instruction. The terminal can be various terminal devices such as a smart phone and a tablet personal computer.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for determining an uplink TA is characterized by comprising the following steps:

receiving a TA (timing advance) adjusting command from a base station, and acquiring a TA adjusting value according to the TA adjusting command;

determining the adjustment precision of the selected TA;

determining a TA actual adjusting value according to the selected TA adjusting precision and the TA adjusting value;

determining the uplink TA according to the TA actual adjustment value;

the determining the adjustment precision of the selected TA comprises:

determining a target subcarrier interval according to the activation state of each subband of a serving cell;

and determining the TA adjusting precision corresponding to the target subcarrier interval as the selected TA adjusting precision.

2. The method of claim 1, wherein the determining the target subcarrier spacing according to the activation status of each subband in the serving cell comprises:

determining a currently activated sub-band;

if only one currently activated subband exists, determining the uplink subcarrier interval and the downlink subcarrier interval of the currently activated subband;

and determining the larger subcarrier interval in the uplink subcarrier interval and the downlink subcarrier interval of the currently activated subband as the target subcarrier interval.

3. The method of claim 1, wherein the determining the target subcarrier spacing according to the activation status of each subband in the serving cell comprises:

determining a currently activated sub-band;

if only one currently activated subband exists, determining the uplink subcarrier interval of the currently activated subband;

and determining the uplink subcarrier interval of the currently activated subband as the target subcarrier interval.

4. The method of claim 1, wherein the determining the target subcarrier spacing according to the activation status of each subband in the serving cell comprises:

determining a currently activated sub-band;

if the number of currently activated sub-bands is multiple, respectively determining the uplink sub-carrier interval and the downlink sub-carrier interval corresponding to each currently activated sub-band;

determining the uplink subcarrier interval corresponding to each currently activated subband and the larger subcarrier interval in the downlink subcarrier intervals;

determining the larger subcarrier spacing as the target subcarrier spacing.

5. The method of claim 1, wherein the determining the target subcarrier spacing according to the activation status of each subband in the serving cell comprises:

determining a currently activated sub-band;

if the number of the currently activated sub-bands is multiple, respectively determining the uplink sub-carrier interval corresponding to each currently activated sub-band;

determining a larger uplink subcarrier interval in the uplink subcarrier intervals corresponding to each currently activated subband;

and determining the larger uplink subcarrier interval as the target subcarrier interval.

6. The method of claim 1, wherein the determining the target subcarrier spacing according to the activation status of each subband in the serving cell comprises:

determining an initially activated sub-band;

determining an uplink subcarrier interval and a downlink subcarrier interval corresponding to the initially activated subband;

and determining the larger subcarrier interval in the uplink subcarrier interval and the downlink subcarrier interval of the initially activated subband as the target subcarrier interval.

7. The method of claim 1, wherein the determining the target subcarrier spacing according to the activation status of each subband in the serving cell comprises:

determining an initially activated sub-band;

determining an uplink subcarrier interval corresponding to the initially activated subband;

and determining the uplink subcarrier interval of the initially activated subband as the target subcarrier interval.

8. The method according to claim 1, wherein the determining the selected TA adjustment accuracy comprises:

determining an uplink subcarrier interval and a downlink subcarrier interval corresponding to a preset subband;

determining the larger subcarrier interval in the uplink subcarrier interval and the downlink subcarrier interval corresponding to the preset subband as a target subcarrier interval;

9. The method according to claim 1, wherein the determining the selected TA adjustment accuracy comprises:

determining an uplink subcarrier interval corresponding to a preset subband;

determining the uplink subcarrier interval corresponding to the preset subband as a target subcarrier interval;

10. The method according to claim 1, wherein the determining the selected TA adjustment accuracy comprises:

determining a receiving sub-band receiving the TA adjusting command;

determining an uplink subcarrier interval and a downlink subcarrier interval corresponding to the receiving subband;

determining the larger subcarrier interval in the uplink subcarrier interval and the downlink subcarrier interval corresponding to the receiving subband as a target subcarrier interval;

11. The method according to claim 1, wherein the determining the selected TA adjustment accuracy comprises:

determining a receiving sub-band receiving the TA adjusting command;

determining the uplink subcarrier interval corresponding to the receiving subband;

determining the uplink subcarrier interval corresponding to the receiving subband as a target subcarrier interval;

12. The method according to claim 1, wherein the determining the selected TA adjustment accuracy comprises:

receiving a TA adjustment accuracy from the base station.

13. The method of claim 12, wherein the TA adjustment accuracy is received from the base station when the TA adjustment command is received.

14. An apparatus for determining an uplink TA, comprising:

the TA adjusting command receiving module is suitable for receiving a TA adjusting command from a base station and acquiring a TA adjusting value according to the TA adjusting command;

the TA adjusting precision determining module is suitable for determining the selected TA adjusting precision;

the TA actual adjustment value determining module is suitable for determining a TA actual adjustment value according to the selected TA adjustment precision and the TA adjustment value;

an uplink TA determining module, adapted to determine the uplink TA according to the actual TA adjustment value;

the TA adjustment precision determining module comprises;

a target subcarrier interval determination unit adapted to determine a target subcarrier interval according to an activation state of each subband of a serving cell;

and the TA adjusting precision determining unit is suitable for determining the TA adjusting precision corresponding to the target subcarrier interval as the selected TA adjusting precision.

15. The apparatus for determining uplink TA according to claim 14, wherein the target subcarrier spacing determining unit includes:

a first current subband determining subunit adapted to determine a currently activated subband;

a first uplink and downlink sub-carrier interval determining sub-unit, adapted to determine the uplink sub-carrier interval and the downlink sub-carrier interval of the currently activated sub-band when there is only one currently activated sub-band;

and a first target subcarrier spacing determining subunit, adapted to determine a larger subcarrier spacing of the uplink subcarrier spacing and the downlink subcarrier spacing of the currently activated subband as the target subcarrier spacing.

16. The apparatus for determining uplink TA according to claim 14, wherein the target subcarrier spacing determining unit includes:

a second current sub-band determining sub-unit adapted to determine a currently activated sub-band;

a first uplink subcarrier spacing determining subunit, adapted to determine the uplink subcarrier spacing of the currently activated subband when there is only one currently activated subband;

and a second target subcarrier spacing determining subunit, adapted to determine the uplink subcarrier spacing of the currently activated subband as the target subcarrier spacing.

17. The apparatus for determining uplink TA according to claim 14, wherein the target subcarrier spacing determining unit includes:

a third current subband determining subunit adapted to determine a currently activated subband;

a second uplink and downlink sub-carrier interval determining sub-unit, adapted to determine, when a plurality of currently activated sub-bands are present, an uplink sub-carrier interval and a downlink sub-carrier interval corresponding to each currently activated sub-band, respectively;

a first larger sub-carrier interval determining sub-unit adapted to determine the uplink sub-carrier interval corresponding to each currently activated sub-band and the larger sub-carrier interval in the downlink sub-carrier intervals

A third target subcarrier spacing determination subunit adapted to determine the larger subcarrier spacing as the target subcarrier spacing.

18. The apparatus for determining uplink TA according to claim 14, wherein the target subcarrier spacing determining unit includes:

a fourth current subband determining subunit adapted to determine a currently activated subband;

a second uplink sub-carrier interval determining sub-unit, adapted to determine, when a plurality of currently activated sub-bands are present, an uplink sub-carrier interval corresponding to each currently activated sub-band, respectively;

a second larger sub-carrier interval determining sub-unit, adapted to determine a larger uplink sub-carrier interval in the uplink sub-carrier intervals corresponding to each currently activated sub-band

A fourth target subcarrier spacing determining subunit, adapted to determine the larger uplink subcarrier spacing as the target subcarrier spacing.

19. The apparatus for determining uplink TA according to claim 14, wherein the target subcarrier spacing determining unit includes:

a first initial subband determining subunit adapted to determine an initially activated subband;

a third uplink and downlink sub-carrier interval determining sub-unit, adapted to determine an uplink sub-carrier interval and a downlink sub-carrier interval corresponding to the initially activated sub-band;

a fifth target subcarrier spacing determining subunit, adapted to determine a larger subcarrier spacing of the uplink subcarrier spacing and the downlink subcarrier spacing of the initially activated subband as the target subcarrier spacing.

20. The apparatus for determining uplink TA according to claim 14, wherein the target subcarrier spacing determining unit includes:

a second initial subband determining subunit adapted to determine an initially activated subband;

a third uplink sub-carrier interval determining sub-unit, adapted to determine an uplink sub-carrier interval corresponding to the initially activated sub-band;

a sixth target subcarrier spacing determining subunit, adapted to determine the uplink subcarrier spacing of the initially activated subband as the target subcarrier spacing.

21. The apparatus for determining an uplink TA according to claim 14, wherein the TA adjustment accuracy determining module comprises:

the first uplink and downlink subcarrier interval determining unit is suitable for determining an uplink subcarrier interval and a downlink subcarrier interval corresponding to a preset subband;

a first target subcarrier spacing determining unit, adapted to determine a larger subcarrier spacing of an uplink subcarrier spacing and a downlink subcarrier spacing corresponding to the preset subband as a target subcarrier spacing;

and the first TA adjusting precision determining unit is suitable for determining the TA adjusting precision corresponding to the target subcarrier interval as the selected TA adjusting precision.

22. The apparatus for determining an uplink TA according to claim 14, wherein the TA adjustment accuracy determining module comprises:

the first uplink subcarrier interval determining unit is suitable for determining the uplink subcarrier interval corresponding to the preset subband;

a second target subcarrier interval determining unit, adapted to determine the uplink subcarrier interval corresponding to the preset subband as a target subcarrier interval;

and the second TA adjusting precision determining unit is suitable for determining the TA adjusting precision corresponding to the target subcarrier interval as the selected TA adjusting precision.

23. The apparatus for determining an uplink TA according to claim 14, wherein the TA adjustment accuracy determining module comprises:

a first receiving sub-band determining unit adapted to determine a receiving sub-band in which the TA adjustment command is received;

a second uplink and downlink sub-carrier interval determining unit, adapted to determine an uplink sub-carrier interval and a downlink sub-carrier interval corresponding to the receiving sub-band;

a third target subcarrier spacing determining unit, adapted to determine the larger subcarrier spacing of the uplink subcarrier spacing and the downlink subcarrier spacing corresponding to the receiving subband as a target subcarrier spacing;

and a third TA adjustment accuracy determining unit, adapted to determine the TA adjustment accuracy corresponding to the target subcarrier interval as the selected TA adjustment accuracy.

24. The apparatus for determining an uplink TA according to claim 14, wherein the TA adjustment accuracy determining module comprises:

a second receiving sub-band determining unit adapted to determine a receiving sub-band in which the TA adjustment command is received;

a second uplink subcarrier interval determining unit, adapted to determine an uplink subcarrier interval corresponding to the receiving subband;

a fourth target subcarrier spacing determining unit, adapted to determine the uplink subcarrier spacing corresponding to the receiving subband as a target subcarrier spacing;

and the fourth TA adjustment accuracy determining unit is suitable for determining the TA adjustment accuracy corresponding to the target subcarrier interval as the selected TA adjustment accuracy.

25. The apparatus for determining an uplink TA according to claim 14, wherein the TA adjustment accuracy determining module comprises:

a TA adjustment accuracy receiving unit adapted to receive TA adjustment accuracy from the base station.

26. The apparatus of claim 25, wherein the TA adjustment accuracy is received from the base station when the TA adjustment command is received.

27. A storage medium having stored thereon computer instructions, wherein the computer instructions are operable to perform the steps of the method for uplink TA determination according to any of claims 1 to 13.

28. A terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor executes the computer instructions to perform the steps of the method for uplink TA determination according to any of claims 1 to 13.