CN109769295A - Time advance method and corresponding user equipment and base station - Google Patents

Abstract

Present disclose provides the method for the time advance for determining multi-beam uplink in a user device and in a base station and corresponding user equipment and base stations.The method executed in a user device includes: receiving time advance command TAC；Determine subcarrier spacing SCS corresponding to received TAC；According to identified SCS determine the TAC corresponding to TA step-length；And the amount of time advance is determined according to the TA step-length of the determination.

Description

Time advance method and corresponding user equipment and base station

Technical field

This disclosure relates to wireless communication technology field, more specifically, this disclosure relates to multi-beam ascending transmission method and Corresponding user equipment and base station.

Background technique

In March, 2016, third generation partner program (3rd Generation Partnership Project: 3GPP) in RAN#71 plenary session, NTT DOCOMO proposes a new research project about 5G technical standard (referring to non-special Sharp document: RP-160671:New SID Proposal:Study on New Radio Access Technology), and obtain Approval.The purpose of the research project is to develop new wireless (New Radio:NR) access technology to answer to meet all of 5G With scene, demand and deployed environment.Mainly there are three application scenarios by NR: mobile broadband communication (the Enhanced Mobile of enhancing Broadband:eMBB), large-scale machines class communicates (massive Machine Type Communication:mMTC) and super Reliable low latency communication (Ultra Reliable and Low Latency Communications:URLLC).It is ground according to this Study carefully a goal programming, two stages of standardization point of NR carry out: the standardization effort of first stage will be completed in mid-terms in 2018； The standardization effort of second stage will be completed in the end of the year 2019.The standard criterion of first stage wants forward compatibility in second stage Standard criterion, and the standard criterion of second stage will be established on standard criterion in the first stage, and meet 5G NR technical bid Quasi- is required.

In NR, it can be carried out using different subcarrier spacings (Subcarrier spacing, SCS) in frequency domain Transmission, such as 15kHz, 30KHz, 60kHz etc..In the system for supporting a variety of subcarrier spacings, how to handle uplink and send and determine Shi Chengwei needs the problem of studying.

Summary of the invention

The purpose of the embodiment of the present disclosure is to propose a solution aiming at the problem that how to handle uplink transmission timing.Specifically Ground, the embodiment of the present disclosure provide the method for determining the time advance of multi-beam uplink in a user device and in a base station And corresponding user equipment and base station.

According to the disclosure in a first aspect, proposing a kind of method executed in user equipment (UE), comprising: receiving time Advance command TAC；Determine subcarrier spacing SCS corresponding to received TAC；The TAC institute is determined according to identified SCS Corresponding TA step-length；And the amount of the time advance is determined according to the TA step-length of the determination.

In some embodiments, determine that SCS corresponding to the received TAC of institute may include using one of following SCS conduct SCS corresponding to received TAC:

Default SCS；

The maximum SCS broadcasted in system information；

The maximum SCS configured in dedicated RRC signaling；

The maximum SCS configured in all uplink BWP in activated state；

Indicated SCS in subcarrier spacing common configuration information element；

Default SCS corresponding to BWP；

SCS corresponding to initial activation BWP；

The TAC, SCS indicated in RAR the or TAC MAC CE of the TAC is carried；

SCS corresponding to first uplink after receiving the TAC；

SCS corresponding to the last one uplink before receiving the TAC

The SCS of message 3 in a nearest random access procedure；

The SCS that the uplink of main plot is configured or used；And

SCS indicated by instruction information in RRC information.

In some embodiments, two kinds of TAC MAC CE is defined in system, is respectively used to the SCS that UE is configured Different change situations.

According to the second aspect of the disclosure, a kind of method executed in a base station is provided, comprising: generation is mentioned comprising the time The message of preceding order TAC, wherein the message package is containing the information for indicating SCS applied by the TAC；And disappear described in transmission Breath.

According to the third aspect of the disclosure, a kind of method executed in a base station is provided, comprising: in user equipment (UE) institute The media that the time advance order of the first kind is sent when the subcarrier spacing SCS of configuration becomes larger or becomes larger more than certain thresholding connect Enter to control control element TAC MAC

CE；And second is sent when the SCS that UE is configured is not changed, become smaller or larger and be less than certain thresholding The TAC MAC CE of type.Wherein, the length of the TACMAC CE of the first kind is greater than the TAC MAC CE's of Second Type Length.

According to the fourth aspect of the disclosure, a kind of user equipment (UE) is provided, comprising: receiving module, when being configured that reception Between advance command TAC；And processing module, be configured that determine subcarrier spacing SCS corresponding to received TAC；According to Identified SCS determines TA step-length corresponding to the TAC；And determine that the time mentions according to the TA step-length of the determination Preceding amount.

In some embodiments, the processing module can be further configured to be used as using one of following SCS and be received TAC corresponding to SCS:

Default SCS；

The maximum SCS broadcasted in system information；

The maximum SCS configured in dedicated RRC signaling；

The maximum SCS configured in all uplink BWP in activated state；

Indicated SCS in subcarrier spacing common configuration information element；

Default SCS corresponding to BWP；

SCS corresponding to initial activation BWP；

The TAC, SCS indicated in RAR the or TAC MAC CE of the TAC is carried；

SCS corresponding to first uplink after receiving the TAC；

SCS corresponding to the last one uplink before receiving the TAC

The SCS of message 3 in a nearest random access procedure；

The SCS that the uplink of main plot is configured or used；And

SCS indicated by instruction information in RRC information.

In some embodiments, two kinds of TAC MAC CE is defined in system, is respectively used to the SCS that UE is configured Different change situations.

According to the 5th of the disclosure the aspect, a kind of base station is provided, comprising: processing module is configured that generation includes the time The message of advance command TAC, the message include to indicate the information of SCS applied by the TAC；And sending module, configuration Are as follows: send the message.

According to the 6th of the disclosure the aspect, a kind of base station is provided, comprising: processing module is configured that generation time advance The media access control control element TAC MAC CE of order；And sending module, send TAC MAC CE generated.Its In, the TACMAC CE generated when the subcarrier spacing SCS that user equipment (UE) is configured becomes larger or becomes larger more than certain thresholding For the TAC MAC CE of the first kind；It does not change in the SCS that UE is configured, become smaller or larger and be less than certain thresholding and given birth to At TAC MAC CE be Second Type TAC MAC CE.The length of the TAC MAC CE of the first kind is greater than the second class The length of the TAC MAC CE of type.

Detailed description of the invention

In order to which the disclosure and its advantage is more fully understood, referring now to being described below in conjunction with attached drawing, in which:

Fig. 1 is to diagrammatically illustrate an exemplary schematic diagram of random access response；

Fig. 2 is to diagrammatically illustrate an exemplary signal of the media access control element comprising time advance order Figure；

Fig. 3 is the schematic diagram for diagrammatically illustrating the upstream time of user equipment and shifting to an earlier date；

Fig. 4 is to diagrammatically illustrate the flow chart of the method for determining TA at UE in NR according to the embodiment of the present disclosure；

Fig. 5 is to diagrammatically illustrate to determine time advance to be applied according to the UE after receiving TAC of the embodiment of the present disclosure Process flow chart；

Fig. 6 is to diagrammatically illustrate to determine the process of the method for TA in base station in NR according to the embodiment of the present disclosure Figure；

Fig. 7 diagrammatically illustrates the structural schematic diagram of the user equipment according to the embodiment of the present disclosure.

Fig. 8 diagrammatically illustrates the structural schematic diagram of the base station according to the embodiment of the present disclosure.

Fig. 9 is diagrammatically illustrated according to the base station that can be used for realizing the disclosure of the embodiment of the present disclosure or the meter of user equipment The block diagram of calculation system.

In the accompanying drawings, the same or similar structure is identified with the same or similar appended drawing reference.

Specific embodiment

According in conjunction with attached drawing to the described in detail below of disclosure exemplary embodiment, other aspects, the advantage of the disclosure Those skilled in the art will become obvious with prominent features.

In the disclosure, term " includes " and " containing " and its derivative mean including rather than limit；Term "or" is packet Containing property, mean and/or.

In the present specification, following various embodiments for describing disclosure principle only illustrate, should not be with any Mode is construed to limitation scope of disclosure.Referring to attached drawing the comprehensive understanding described below that is used to help by claim and its equivalent The exemplary embodiment for the disclosure that object limits.Described below includes a variety of details to help to understand, but these details are answered Think to be only exemplary.Therefore, it will be appreciated by those of ordinary skill in the art that without departing substantially from the scope of the present disclosure and spirit In the case where, embodiment described herein can be made various changes and modifications.In addition, for clarity and brevity, The description of known function and structure is omitted.In addition, running through attached drawing, same reference numbers are used for identity function and operation.

Hereafter using LTE mobile communication system and its subsequent evolution version as sample application environment, root has been described in detail According to multiple embodiments of the disclosure.It should be noted, however, that the present disclosure is not limited to following implementation, but it is applicable In more other wireless communication systems.

Below first pair this disclosure relates to some concepts be illustrated.It is worth noting that, in the following description Some names are only that example is illustrative and not restrictive, can also make other names.

Main plot: refer to cell of the work in basic frequency.It is that UE executes initial connection and establishes or initiate the connection and re-establish Indicated main plot in cell or switching command where process.In the embodiment of the present disclosure, main plot also can refer to major-minor small Area, if i.e. UE be indicated on thereon execute random access or when secondary cell group change when random access procedure be ignored when it is initial Secondary cell group cell where PUSCH transmission.For major-minor cell, base station by RRC signaling inform its major-minor cell ID of UE, Frequency and other major-minor community configured informations.

Secondary cell: for providing the cell of additional radio resource.It is in wireless heterogeneous networks (Radio Resource Control, abbreviation RRC) connection is allocated to UE after establishing.

Serving cell: referring to main plot under non-carrier polymerization or non-dual link scene, in carrier wave polymerization or dual link scene The lower all cells referred to as UE service.

Portions of bandwidth (Bandwidth Part):, can be on up to the 100M even wide bandwidth of GHz magnitude in NR system Operation.One broadband (Wideband) carrier wave can be divided into multiple portions on frequency domain, these parts are known as portions of bandwidth.It is described Portions of bandwidth is also referred to as carrier bandwidths part (carrier bandwidth part), it includes one group of continuous Physical Resource Block PRB set, these PRB are selected from some carrier wave attribute that has on a bandwidth carrier, and (i.e. OFDMnumerolog is by son A carrier wave attribute defined in carrier wave interval and CP type/length, specifically refers to 4.2 sections of 3GPP protocol specification 38211) Carrier resource block continuation subset in.The division of portions of bandwidth is adapted to support the UE of different bandwidth range, while can be with Reduce the energy consumption etc. that UE is transmitted on bandwidth carrier.Different portions of bandwidth can be overlapped or be not overlapped.Different bandwidth Part can use different parameter values (numerologies), such as subcarrier spacing, TTI length, bandwidth, cyclic prefix It (cyclicPrefix) etc. can be different.

Random access response (Random Access Response, RAR): the Article 2 message in random access procedure. Base station can be after receiving the random access preamble of UE, by sending accidental access response message come to the random access preamble Reception responded.It include time advance (Time advance or Timing advance, letter in accidental access response message Claim TA) domain, uplink license domain, UE identification field etc..

Message 3: the Article 3 message during random access response.In the disclosure, the system of message 3 refers to that UE is wrapped in RAR Transmitted uplink on the indicated ascending resource of the uplink license contained.Both it can refer to random access procedure competition-based In Article 3 transmission, can also refer to based on first uplink after non-competing random access procedure.

NR-PDCCH: refer to Physical Downlink Control Channel (the New Radio Physical Downlink Control in NR Channel), it is used for transmission Downlink Control Information, can be also simply referred to as PDCCH.

NR-PDSCH: refer to Physical Downlink Shared Channel (the New Radio Physical Downlink Shared in NR Channel), it is used for transmission downlink data, can be also simply referred to as PDSCH.

NR-PUCCH: refer to Physical Uplink Control Channel (the New Radio Physical Uplink Control in NR Channel), it is used for transmission ascending control information, can be also simply referred to as PUCCH.

NR-PUSCH: refer to Physical Uplink Shared Channel (the New Radio Physical Uplink Shared in NR Channel), it is used for transmission upstream data, can also be used for transmitting uplink control information such as aperiodic channel status under some cases Instruction.It can be also simply referred to as PUSCH.

Media access control element (Media Access Control layer Control Element, abbreviation MAC CE): MAC layer signaling.

Time advance (Time advance or Timing advance, TA): refer to the time advance value that UE uplink is sent.For The uplink alignment of base station, different UE need to send uplink since different time points, i.e. UE needs to know it The time advance value that uplink is sent.

Time advance group (Timing Advance Group, TAG): by wireless heterogeneous networks (Radio resource Control, RRC) configuration one group of serving cell or wave beam, these serving cells or wave beam are configured for uplink, and use phase Same time reference cell and identical time advance value.

Descending reference: descending reference refers to reference time point of the UE for uplink in the disclosure.That is UE is under it Row receiving time is as reference, in addition its Timing Advance obtains the time point of its uplink transmission, also referred to as time reference.Its is right The cell answered is known as time reference cell.

Time advance order (Timing advance command, referred to as TAC): what base station issued includes time advance The order of information.It may include two kinds of forms, one is include time advance order in RAR.Fig. 1, which is shown, to be included in An example of TAC in RAR.Another kind is the media access control (Media for individually including time advance order Access Control, abbreviation MAC) control element, upstream time lead is calculated for UE.Fig. 2 shows TAC MAC CE An example.

Below by taking LTE system as an example, the meaning of time advance is schematically illustrated with reference to Fig. 3.Fig. 3 shows the up-link wireless of UE The initial time of the transmission of frame i is advanced by T seconds relative to the initial time of corresponding downlink radio frame i.UE can be according to reception To TAC calculate Timing Advance T.

In existing LTE, when UE receives TAC (being 11 bits in LTE system) in random access response, to corresponding TAG, using the TAC.It is assumed that the value of TAC instruction is T_A, then actual Timing Advance is T=(N_TA+N_TAoffset)×T_s, Middle N_TA=T_A× N, N are TA quantization step, i.e.,It is fixed in existing LTE, such as 16；N_TAoffsetIt is to take Certainly in the offset of frame structure, such as at frame structure Class1 (FDD), N_TAoffset=0, at frame structure type 2 (TDD), N_TAoffset=624；Ts is chronomere, such as Ts length is 1/30720 millisecond in LTE system.

It, should to corresponding TAG application when UE receives TAC MAC CE (being 6 bits in LTE system) in existing LTE TAC.In order to save bit number, the TAC in TAC MAC CE indicates the absolute of time advance usually unlike the TAC in RAR Amount, but rather indicate that the adjustment amount relative to current time advance.It is assumed that the value of TAC instruction is T_A, then the actual time mentions Preceding amount is T=(N_{TA, new}+N_TAoffset)×T_sSecond, wherein N_{TA, new}It is N adjusted_TAValue, N_{TA, new}=N_{TA, old}+(T_A- 31) * N, N_{TA, old}To receive the N before TAC_TAValue.N,N_TAoffsetIt is identical as front with the meaning of Ts.

In the NR system discussed at present, a variety of subcarrier spacings (SCS) of NR support, including but not limited to 15kHz, 30kHz, 60kHz, 120kHz, 240kHz, 360kHz, 480kHz etc..Timing Advance (hereinafter referred to as TA amount) is with one The multiple of adjusting step (or granularity or unit) is adjusted.And the step-length and SCS are relevant.In general, SCS Bigger, the time demand precision of required TA adjustment can be thinner, so that required TA step-length is also smaller.The following table 1 lattice are exemplary to be given The corresponding relationship of SCS and TA step-length.It should be understood that table 1 is merely illustrative, the corresponding relationship of SCS and TA step-length may include table 1 Any one or more combination, or may exist other corresponding relationships.With it is similar above, Ts indicate chronomere, for example, Chronomere Ts in NR is 1/ (64*30.72*10⁶) second.

The corresponding relationship of table 1:SCS and TA step-length

The SCS of uplink	TA step-length
		15kHz	16*64Ts
30kHz	8*64Ts
		60kHz	4*64Ts
120kHz	2*64Ts
		240kHz	64Ts
480kHz	32Ts

In NR system, the frequency band of a cell is divided into multiple BWP, and the upstream or downstream transmission on different BWP can To use different SCS.Further, transmitting SCS used by different physical channels or different message may also can It is different.Different cells also can be used different SCS and carry out upstream or downstream transmission.In current discussion, under connection status UE used in BWP can carry out dynamic change, for example pass through Downlink Control Information (Downlink Control Information, DCI) variation of BWP is notified alternatively, alternatively can be the BWP change based on timer.To a UE Speech, in the case where being configured with multiple BWP (or serving cell) of SCS not of the same race or being configured for the dynamic change of BWP, when When receiving TAC (TAC that the TAC or TAC MAC CE that such as RAR is carried is carried), TA step-length how is obtained, to be calculated just True TA amount, becomes the embodiment of the present disclosure and mainly solves the problems, such as.

In NR, upstream time alignment or uplink and downlink time unifying can be and equally use radio frames in LTE system (radio frame) alignment is also possible to time slot (slot) alignment, subframe (subframe) alignment or symbol (such as OFDM (Orthogonal Frequency Division Multiplexing) symbol or SC-FDMA (Single-carrier Frequency-Division Multiple Access) symbol) alignment.Even, the chronomere of alignment can also be several Time slot/subframe/symbol combination.

In the following embodiments, unless otherwise noted, uplink includes NR-PUCCH and/or NR-PUSCH, can be with It can not also include Physical Random Access Channel including Physical Random Access Channel (random access preamble).Optionally, uplink passes Defeated can also include uplink reference signals.

Fig. 4 shows the method 100 for determining TA at UE in NR according to the embodiment of the present disclosure.

Following description is also applied for for a TAG for all TAG.

As shown, in step s 110: UE receives TAC.TAC herein can be the TAC of RAR carrying, or can be with It is the TAC that TAC MAC CE is carried.For example, UE receives TAC MAC CE in subframe n.For example, UE receives TAC in subframe n MACCE。

In the step s 120: UE carries out time adjustment using the TAC, wherein the amount of time adjustment is depending on described The value of TAC and the corresponding TA step-length of the TAC.In order to save transfer resource (e.g., bit number), the value of TAC is usually a mark Amount indicates multiple of the amount (TA amount or TA adjustment amount) of time adjustment relative to TA step-length.Specifically, UE can be according to connecing The TAC received step-length corresponding with the TAC determines TA amount to be applied or TA adjustment amount, then applies the TA for uplink Amount or TA adjustment amount.For example, UE is adjusted since subframe n+k using corresponding uplink transmission time.

Fig. 5, which is shown, determines TA amount to be applied (or TA adjustment amount) according to the UE after receiving TAC of the embodiment of the present disclosure Process 200 an example.The process 200 can be considered as a specific implementation of step S120.

As shown, in step S210: UE determines the SCS that the TAC is corresponding or uses.It, will be under about this point It is described in detail in text with reference to various embodiments.

In step S220: UE determines the TAC institute according to identified SCS and SCS and the corresponding relationship of TA step-length TA step-length that is corresponding or using.For example, can be according to true in the corresponding relationship and step S210 of SCS the and TA step-length in table 1 Fixed SCS determines corresponding TA step-length.

In step S230: UE determines TA amount or TA adjustment amount according to identified TA step-length.

After TA step-length has been determined, according to TAC carry information be indicate time advance absolute magnitude, or instruction when Between in advance adjustment amount, can correspondingly calculate TA amount or TA adjustment amount.It should be understood that TAC in RAR, usually carrying and time The relevant information of absolute magnitude in advance.TAC in TAC MAC CE can be carried and time advance as the TAC in RAR The relevant information of absolute magnitude, it is preferable that in order to save transfer resource (such as bit number) its can carry with time advance The relevant information of adjustment amount.Specifically, for example, in NR can using with the similar calculating of the TA amount in existing LTE, but it is attached Add and considers TA step-length.It is introduced in two kinds of situation below.

When the absolute magnitude for the information instruction time advance that TAC is carried, it is assumed that the value of TAC instruction is T_A, then UE is determined New TA amount is T=(N_TA+N_TAoffset)×T_s, whereinT_stepFor identified TA step-length.N_TAoffsetIt is Offset, it is predefined to can be system, can also be configured by base station, as base station is configured by RRC.Preferably, N_TAoffsetDifferent values can have for different frame structure types.Ts is chronomere, such as the Ts length in NR system It can be 1/ (64*30.72*10⁶) second.

When the adjustment amount for the information instruction time advance that TAC is carried, it is assumed that the value of TAC instruction is T_A, then UE is determined New TA amount is T=(N_{TA, new}+N_TAoffset)×T_sSecond, whereinN_{TA, new}It is adjustment N afterwards_TAValue, N_{TA, old}To receive the N before TAC_TAValue.X is constant, and the maximum time that the system of depending on can adjust is inclined Difference optionally additionally depends on TA step-length used in adjustment.T_stepFor identified TA step-length.N_TAoffsetIt is offset, it can It to be that system is predefined, can also be configured by base station, as base station is configured by RRC.Preferably, N_TAoffsetFor different Frame structure type can have different values.Ts is chronomere, such as Ts length can be 1/ (64* in NR system 30.72*10⁶) second.

The example that the UE in step S230 determines TA amount according to identified TA step-length is described above.Alternatively, exist UE can determine TA adjustment amount according to identified TA step-length in step S230.This is commonly available to following situations: UE is received What the TAC to TAC MAC CE, and in TAC MAC CE was carried is information relevant to the adjustment amount of time advance.It is assumed that should The value of TAC instruction is T_A, then UE can determine that TA adjustment amount isWherein X is constant, is depended on In the maximum time deviation that system can adjust, optionally, TA step-length used in adjustment is additionally depended on.T_stepIt is identified TA step-length.Ts is chronomere, such as Ts length can be 1/ (64*30.72*10 in NR system⁶) second.

Fig. 4 is returned to, in the step s 120, after TA amount or TA adjustment amount has been determined, UE can apply the TA amount Or TA adjustment amount.For example, UE applies the TA amount or TA adjustment amount since subframe n+k, for corresponding uplink.

The method for describing to determine TA at UE below by specific example.

A usual TAC is directed to same TAG.For this TAG, identical SCS can be used to determine corresponding TA Step-length.In some implementations, a TAC can be directed to different TAG.It, can also be using identical SCS come really for this TAC Fixed corresponding TA step-length.The determination TAC of embodiment described below 1~15 is applied or the method for corresponding SCS is for upper Two kinds of TAC are stated to be applicable in.

Further it should be noted that after being aware of any of the corresponding TA amount to be applied of TAC and TA adjustment amount, Another can be readily derived in conjunction with current TA amount.It therefore, for ease of description, in embodiments below will be mainly with determination It is described for TA amount to be applied, but described method is equally applicable to determine TA adjustment amount to be applied.

Embodiment 1:

In this embodiment, UE, which is determined, is applied to received TAC for default SCS.Correspondingly, UE will be according to default SCS TA step-length is determined, so that TA amount be calculated.In other words, it is used for calculating the SCS of (or determination) TA amount (or TA step-length) Default SCS.

Optionally, the default SCS can be predefined, for example, 480kHz.

Optionally, the default SCS can be the maximum SCS that UE is supported.In this embodiment, UE needs will be certainly Oneself SCS ability (the maximum SCS of the SCS type or support supported) is reported to base station.Such as it reports and disappears in UE ability information It include the information for being used to indicate the maximum SCS of SCS type or support that UE is supported in breath.Further, the SCS is referred to The corresponding SCS of uplink.

Optionally, the default SCS is the maximum SCS that base station is supported.In this embodiment, base station can pass through The maximum SCS that the mode of broadcast or dedicated signaling is supported informs UE.

Further, the SCS is uplink SCS.

Embodiment 2

In this embodiment, UE, which is determined, is applied to received TAC for the maximum SCS broadcasted in system information.Accordingly Ground, UE will determine TA step-length by SCS accordingly, so that TA amount be calculated.In other words, for calculating (or determine) TA amount (or TA Step-length) SCS using the maximum SCS broadcasted in system information.

The maximum SCS broadcasted in the system information refers to including that host system message block and/or system information block exist The maximum value of SCS value included in interior broadcast message.

Further, the SCS is uplink SCS.

Embodiment 3

In this embodiment, UE, which is determined, is applied to received TAC for the maximum SCS configured in dedicated RRC signaling.Phase SCS determines TA step-length accordingly by Ying Di, UE, so that TA amount be calculated.In other words, for calculating (or determine) TA amount (or TA Step-length) SCS using the maximum SCS configured in dedicated RRC signaling.The dedicated RRC signaling refers to that UE is received from base station Just for the RRC information of the UE, for configuring the wireless parameter of the UE.Such as can be RRC reconfiguration message (or RRC connect Connect reconfiguration message), RRC re-establishes message (or RRC connection re-establishment message), RRC restores message (or RRC connection is extensive Multiple message), RRC release message (or RRC connection release message), etc..

Optionally, in this embodiment, the maximum SCS configured in the dedicated RRC signaling is corresponding for TAC In TAG all serving cells (or all serving cells uplink or all serving cells uplink BWP) configured Maximum SCS.

Optionally, in this embodiment, the maximum SCS configured in the dedicated RRC signaling is to all serving cells (or all serving cells uplink or all serving cells uplink BWP) the maximum SCS that is configured.

Embodiment 4

In this embodiment, the maximum SCS configured in all uplink BWP in activated state is applied to by UE determination The TAC received.Correspondingly, SCS determines TA step-length to UE accordingly, so that TA amount be calculated.In other words, for calculate (or Determining) SCS of TA amount (or TA step-length) uses the maximum SCS configured in all BWP in activated state.

Embodiment 5

In this embodiment, UE determines the subcarrier spacing common configuration information element that will be received (i.e. Subcarrierspacingcommon information element) in indicated SCS be applied to received TAC.Correspondingly, UE is accordingly SCS determines TA step-length, so that TA amount be calculated.In other words, it is adopted for calculating the SCS of (or determination) TA amount (or TA step-length) With SCS indicated in subcarrierspacingcommon information element.Optionally, described Subcarrierspacingcommon information element may be embodied in system information.Optionally, described Subcarrierspacingcommon information element can refer to the corresponding subcarrierspacingcommon information in main plot Element.

Embodiment 6

In this embodiment, if UE is configured with default BWP, UE is determined for SCS corresponding to default BWP to be applied to and be received The TAC arrived.Correspondingly, SCS determines TA step-length to UE accordingly, so that TA amount be calculated.In other words, for calculating (or determination) The SCS of TA amount (or TA step-length) is using SCS corresponding to default BWP.

In one embodiment, the default BWP can refer to the default BWP of main plot.The main plot can be master Main plot (PCell) in cell group, the major-minor cell (PSCell) being also possible in secondary cell group.

In another embodiment, the default BWP can refer in multiple default BWP that all serving cells are configured One.For example it is configured with the default BWP of maximum SCS.Optionally, all serving cells can refer to the institute in a TAG There is serving cell.

The default BWP refers to default upstream BWP or defaults the uplink BWP of BWP centering.Default BWP is led to by base station It crosses RRC signaling and is allocated to UE.In general, default includes synchronization signal block (Sycnronization Signal on BWP Block, SSB).Default BWP can be BWP identical with initial activation BWP, be also possible to different BWP.For UE, if One serving cell is not configured to default BWP, then it is assumed that default BWP is exactly initial activation BWP.It is being configured with based on timer When BWP is changed, if timer expiry, UE is returned on default BWP and is transmitted, it is believed that activation BWP is default BWP.Preferably, BWP 0 BWP is identified as default BWP.Alternatively, having the BWP of explicit default BWP instruction information is default BWP.

Embodiment 7

In this embodiment, SCS corresponding to initial activation BWP is applied to received TAC by UE determination.Correspondingly, SCS determines TA step-length to UE accordingly, so that TA amount be calculated.In other words, for calculating (or determination) TA amount (or TA step-length) SCS using SCS corresponding to initial activation BWP.

In one embodiment, the initial activation BWP can refer to the initial activation BWP of main plot.The main plot It can be the main plot (PCell) in the group of main plot, the major-minor cell (PSCell) being also possible in secondary cell group.

In another embodiment, what the initial activation BWP can refer to that all serving cells are configured is multiple initial Activate one in BWP.For example it is configured with the initial activation BWP of maximum SCS.Optionally, all serving cells can refer to All serving cells in one TAG.

The initial activation BWP refers to the uplink BWP, Ke Yili of initial activation uplink BWP or initial activation BWP centering Xie Wei, for a UE, explicitly configure or reconfigure BWP before available uplink BWP, it is described it is explicit configuration or reconfigure BWP can occur in RRC connection establishment process or later.In general, to an allocated frequency band, initial activation BWP be by It is limited in UE minimum bandwidth.Preferably, initial activation BWP is generally used for initial access process, but being also can be initial Access continues to use initial activation BWP, or for a serving cell (such as secondary cell) after completing, and is also possible to institute The BWP of first activation of configuration.Therefore in the present embodiment, initial activation BWP (initial active BWP) can also claim The BWP (first active BWP) activated for first.I.e. in short, initial activation BWP refers to UE on one cell The BWP of used first activation.

Preferably, for main plot, the configuration of initial activation BWP is included in system information；For secondary cell, The configuration of its initial activation BWP is included in the RRC signaling comprising secondary cell configuration information.

Embodiment 8

In this embodiment, in TAC, or in RAR the or TAC MAC CE of carrying TAC, may include instruction application should TAC uses the domain SCS of the SCS of (or association or corresponding) when calculating TA.RAR the or TAC MAC that UE determines TAC, carries TAC In CE indicated SCS is applied to received TAC, TA step-length is determined with this SCS, so that TA amount be calculated.In other words, SCS for calculating (or determination) TA amount (or TA step-length) uses TAC, carries meaning in RAR the or TAC MAC CE of TAC The SCS shown.

In this embodiment, which is a newly-increased domain, can be used as an extension field in TAC, Huo Zhezuo To include except the domain TAC the extension field in RAR or TAC MAC CE.

Embodiment 9

In this embodiment, UE, which is determined, to be applied to receiving SCS used in first after the TAC uplink The TAC received determines TA step-length with this SCS, so that TA amount be calculated.In other words, for calculating (or determination) TA amount The SCS of (or TA step-length) is using SCS corresponding to first uplink after receiving the TAC.

Optionally, first uplink can be first PUSCH uplink or first PUCCH uplink passes It is defeated.

Optionally, first uplink can be sends out in all serving cells in the TAG associated by the TAC First uplink sent.

Embodiment 10

In this embodiment, UE, which is determined, to receive the application of SCS used in the last one uplink before the TAC In the TAC received, TA step-length is determined with this SCS, so that TA amount be calculated.In other words, for calculating (or determination) TA The SCS of amount (or TA step-length) is using SCS corresponding to the last one uplink before receiving the TAC.

Optionally, the last one described uplink can be the last one PUSCH uplink or the last one PUCCH Uplink.

Optionally, the last one described uplink can be in all serving cells in the TAG associated by the TAC The last one uplink sent.

Embodiment 11

In this embodiment, UE, which is determined, is applied to the reception for the SCS of the message 3 in a nearest random access procedure The TAC arrived obtains TA step-length required for calculating TA with this SCS, so that TA amount be calculated.In other words, for calculate (or really The SCS of TA amount (or TA step-length) uses the SCS of the message 3 in a nearest random access procedure calmly).

Optionally, a nearest random access procedure can refer to the nearest random access before receiving the TAC Process.

Optionally, the message 3 refers to the uplink carried out in the indicated resource of the uplink license in RAR.

Embodiment 12

In the present embodiment, it is received to determine that the SCS that the uplink of main plot is configured or used is applied to by UE TAC, to determine TA step-length, for calculating TA amount.In other words, after UE receives TAC, for calculating (or determine) TA amount (or TA Step-length) SCS using main plot the uplink SCS that configures or use.

Optionally, which can be applied under the scene that a cell only supports a SCS.

Optionally, in this embodiment, the main plot can be the main plot PCell of main plot group, be also possible to auxiliary Major-minor cell PSCell in cell group.

Embodiment 13

In the present embodiment, UE is determined SCS indicated by the instruction information in RRC information applied to received TAC, to determine TA step-length, for calculating TA amount.In other words, after UE receives TAC, for calculating (or determine) TA amount (or TA Step-length) SCS using SCS indicated by the instruction information in RRC information.The instruction information is configured comprising SCS, is used to indicate Corresponding SCS when UE application TAC.

Embodiment 14

Above-described embodiment is not only suitable for the TAC that the TAC in RAR is also applied in TAC MAC CE.Different from aforementioned implementation , the method in the present embodiment is especially suitable for the TAC in RAR.More specifically, how the present embodiment actually determines TAC in RAR SCS that is associated or using, with TA step-length when TAC in RAR that is applied, to calculate TA amount.

In this embodiment, UE determines the TAC that maximum SCS is applied in received RAR, to determine TA step-length, For calculating TA amount.In other words, after UE receives the TAC in RAR, for calculating the SCS of (or determination) TA amount (or TA step-length) Using maximum SCS.

In a kind of mode, the maximum SCS can refer to the maximum SCS that message 3 is supported.In a further mode of operation, The maximum SCS can refer to the maximum SCS that cell or system are supported.In another mode, the maximum SCS is solid Fixed setting, such as 120kHz or 60kHz.It in a further mode of operation, is its serving cell for the UE of connected state, the maximum SCS Or the maximum SCS that the BWP of serving cell is configured.Optionally, the serving cell can be the serving cell in a TAG.

The TA error compensating method when SCS change that UE is configured is described below

TA Error processing problem when the SCS change that the section Example is configured for UE proposes a solution.Because The time precision that different SCS adjust TA require it is different, thus can be using different TA step-lengths under different SCS configurations Signaling overheads is reduced under while meeting accuracy requirement.When the SCS that UE is configured occurs and changes (especially from lesser SCS Be altered to biggish SCS, such as from 15kHz to 480kHz when), due to different (e.g., required precision is got higher) to time required precision, Base station may issue TAC to UE to adjust TA amount, obtain more accurate TA.But since TA step-length before is larger, lead to it After the opposite adjustment of preceding TA for required TA, there are certain error, the usual difference is larger, can not use existing TAC MAC CE (such as 6 bits) completes the TA adjustment.For this purpose, following embodiments 15 of the application propose a kind of solution.

Embodiment 15

In this embodiment, two kinds of TAC MAC CE is defined.A kind of TAC MACCE has more bit number, Such as 12 bits, long TAC MAC CE or Class1 TAC MAC CE can be called.TAC in the long TAC MAC CE indicates the time Absolute magnitude in advance.Another TAC MAC CE has less bit number, such as 6 bits or 7 bits, can be called short TAC MAC CE or type 2TAC MAC CE.TAC instruction time advance in the short TAC MAC CE is relative to the adjustment currently measured Amount.It is worth noting that, the title of above-mentioned TAC MAC CE is merely for convenience of stating, it is not to defined in the present embodiment Both TAC MAC CE restriction.

The TAC MAC CE of above two type can be used for the different change situation for the SCS that UE is configured.

Optionally, when the long TAC MAC CE can be used for the SCS that UE is configured and change.More specifically, being used for When the SCS that UE is configured becomes larger or becomes larger more than a certain range/thresholding.

Optionally, when the short TAC MAC CE can be used for the SCS that UE is configured and not change.Optionally, described Short TAC MAC CE can also be used in the SCS that UE is configured and become smaller or larger when being less than a certain range/thresholding.

If UE receives TAC MAC CE, UE one long in application TAC progress TA calculating, execute in operations described below It is one or more:

N is calculated using the same procedure in the case of the absolute magnitude for indicating time advance with the TAC received_TA, such asWherein T_AFor the value obtained from TAC, T_stepFor TA step-length.The method of determination of TA step-length can be using this Any method in embodiment 1 to 12 in open.

Ignore the N that (or abandon or discharge) is saved_{TA, old}；Or by N_{TA, old}Zero setting.

Optionally, the uplink service cell that the corresponding SCS of TAC which carries can be configured using UE Or the SCS of uplink BWP.Further, the SCS can refer in the SCS for the uplink service cell or uplink BWP that UE is configured Maximum SCS.

If UE receives TAC MAC CE, UE one short in application TAC progress TA calculating, using in current TA base The mode being overlapped on plinth obtains new TA.Such as determine that new TA amount is T=(N_{TA, new}+N_TAoffset)×T_sSecond, whereinN_{TA, old}It is the TA value before current TA value adjusts；T_AIt is obtained from TAC Value；X is a constant；Ts is the chronomere in NR, for example, 1/ (64*30.72*10⁶) second；N_TAoffsetIt is deviant, it can To be that system is predefined, it is also possible to be configured by base station by RRC.T_stepFor TA step-length.The method of determination of TA step-length can Using the method any in embodiment 1 to 12 in the disclosure.

Optionally, the corresponding SCS of TAC that the short TAC MAC CE is carried can refer to the uplink service cell that UE is configured Or the SCS of uplink BWP.Further, the SCS can refer in the SCS for the uplink service cell or uplink BWP that UE is configured Maximum SCS.

Optionally, the TAC MAC CE of both types can use different Logic Channel Identifiers in MAC layer (Logical Channel Identity, LCID) is distinguished.For example, long TAC MAC CE can correspond to 5 bits LCID, short TAC MAC CE can correspond to another 5 different bit LCID.

Fig. 6, which is shown, determines the method 300 of TA in base station in NR according to the embodiment of the present disclosure.

As described in Figure, in step s310, the message comprising TAC is generated.The message can be RAR message.Alternatively, The message can be TAC MAC CE.

In step s 320, the message is sent.

The realization of method 300 is illustrated below by two embodiments.

Embodiment 16

The embodiment is executed in base station side, corresponding to the side the UE method in embodiment 8.

In this embodiment, the message comprising TAC that base station is sent to UE may include the domain SRS.The domain SCS is used to indicate The SCS of (or association or corresponding) is used when being used for using the TAC and calculate TA.In some implementations, which may be embodied in In the domain TAC.In other realizations, the domain SCS can be include carry the TAC RAR TACMAC CE in Domain except the domain TAC.

Optionally, method 300 can be comprising steps of determine the SCS for being used for TAC to be sent.

Embodiment 17

The embodiment is executed in base station side, which corresponds to the UE method of embodiment 14.

In this embodiment, two kinds of TAC MAC CE is defined.A kind of TAC MACCE has more bit number, Such as 12 bits, long TAC MAC CE or Class1 TAC MAC CE can be called；Another TAC MAC CE has less bit Number, such as 6 bits or 7 bits, can be called short TAC MAC CE or type 2TAC MAC CE.It is worth noting that, above-mentioned TAC The title of MAC CE is merely for convenience of stating, and is not the limit to both TAC MAC CE defined in the present embodiment It is fixed.

The TAC MAC CE of above two type can be used for the different change situation for the SCS that UE is configured.Specifically, exist In the case of first, the TAC MAC CE of the first kind is sent.In a second situation, the TAC MAC CE of Second Type is sent.

As an example, in the first case, when changing such as the SCS configured as UE, base station uses long TAC MAC CE issues TAC, is adjusted with the uplink lead to UE.More specifically, when the UE SCS configured becomes larger or becomes larger more than one When determining range/thresholding, base station issues TAC using the long TAC MAC CE, is adjusted with the uplink lead to UE.It is optional Ground, the SCS can refer to the SCS of the uplink service cell that UE is configured or uplink BWP.Further, the SCS can refer to Maximum SCS in the SCS of uplink service cell or uplink BWP that UE is configured.

To send TAC MAC CE one long, then the feelings with the absolute magnitude of TAC instruction time advance can be used in base station The same calculation method obtains the value of the TAC in long TAC MAC CE under shape.

As an example, in a second situation, when not changed such as the SCS configured as UE, or configured as UE SCS becomes smaller or larger when being less than a certain range/thresholding, and base station sends short TAC MAC CE to UE, is shifted to an earlier date with the uplink to UE Amount is adjusted.Optionally, the SCS can refer to the SCS for the uplink service cell or uplink BWP that UE is configured.Further Ground, the SCS can refer to the maximum SCS in the SCS of the uplink service cell that UE is configured or uplink BWP.

To send TAC MAC CE one short, then base station is adjusted based on TA value before, i.e. in TAC MAC CE TA value be relative to old N_TAThe adjustment amount of value.

Optionally, long TAC MAC CE and short TAC MAC CE can use different Logic Channel Identifiers in MAC layer (Logical Channel Identity, LCID) is distinguished.The LCID, short TAC of i.e. long corresponding 5 bits of TAC MAC CE MAC CE corresponds to another 5 different bit LCID.

Fig. 7 shows the schematic block diagram of the user equipment (UE) 20 according to the embodiment of the present disclosure.As shown, user equipment 20 may include receiving module 22 and processing module 24.Optionally, UE 20 can also include other modules, such as memory module 26.

Receiving module 22 is configurable to receiving time advance command TAC.

Processing module 24 is configurable to carry out time adjustment to uplink using the received TAC of institute, wherein when described Between the amount that adjusts depend on the value and the corresponding time advance TA step-length of the TAC of the TAC.

Fig. 8 shows the schematic block diagram of the base station 10 according to the embodiment of the present disclosure.As shown, base station 10 may include hair Send module 12 and processing module 14.Optionally, base station 10 can also include memory module 16.

Processing module 14 is configurable to generate the message comprising TAC.The message can be RAR message.Alternatively, institute Stating message can be TAC MAC CE.

Sending module 12 is configurable to send the message generated comprising TAC.

It is configurable to execute the above method 100 according to the user equipment (UE) 20 of the embodiment of the present disclosure.Particularly, 20 UE It is configurable to execute any method in above-described embodiment 1~15.It can according to the base station 10 of the embodiment of the present disclosure To be configured to execute the above method 300.Particularly, base station 10 can execute method described in above-described embodiment 16 or 17.About The concrete operations of user equipment and base station may refer to the description above as described in method, and details are not described herein.

Fig. 9 is diagrammatically illustrated according to the base station that can be used for realizing the disclosure of the embodiment of the present disclosure or the meter of user equipment The block diagram of calculation system.

As shown in figure 9, computing system 600 include processor 610, computer readable storage medium 620, output interface 630, And input interface 640.The computing system 600 can execute the method 100 or 300 above with reference to Fig. 4 or Fig. 6 description, with true Determine the TA in NR.

Specifically, processor 610 for example may include general purpose microprocessor, instruction set processor and/or related chip group And/or special microprocessor (for example, specific integrated circuit (ASIC)), etc..Processor 610 can also include using for caching The onboard storage device on way.Processor 610 can be each movement for executing the method flow for referring to Fig. 4 or Fig. 6 description Single treatment unit either multiple processing units.

Computer readable storage medium 620, such as can be times can include, store, transmitting, propagating or transmitting instruction Meaning medium.For example, readable storage medium storing program for executing can include but is not limited to electricity, magnetic, optical, electromagnetic, infrared or semiconductor system, device, Device or propagation medium.The specific example of readable storage medium storing program for executing includes: magnetic memory apparatus, such as tape or hard disk (HDD)；Optical storage Device, such as CD (CD-ROM)；Memory, such as random access memory (RAM) or flash memory；And/or wire/wireless communication chain Road.

Computer readable storage medium 620 may include computer program 621, which may include generation Code/computer executable instructions execute processor 610 for example above in conjunction with Fig. 4~figure Method flow described in 6 and its any deformation.

Computer program 621 can be configured to have the computer program code for example including computer program module.Example Such as, in the exemplary embodiment, the code in computer program 621 may include one or more program modules, for example including 621A, module 621B ....It should be noted that the division mode and number of module are not fixation, those skilled in the art can To be combined according to the actual situation using suitable program module or program module, when these program modules are combined by processor 610 When execution, processor 610 is executed for example above in conjunction with method flow described in Fig. 4~Fig. 6 and its any deformation.

In accordance with an embodiment of the present disclosure, output interface 630 and input interface 640 can be used to execute in processor 610 Face combines method flow and its any deformation described in Fig. 4~Fig. 6.

Preferred embodiment is had been combined above disclosed method and the equipment being related to is described.The disclosure provides The mechanism of uplink transmission timing is handled in NR of the frequency domain using different subcarrier spacings.According to the embodiment of the present disclosure The uplink alignment of base station may be implemented in mode.It, can be with according to the mode of preferred embodiment of the present disclosure (such as embodiment 14) In the SCS change that UE is configured, the uplink alignment of base station is still ensured that.

In this application, " base station " refers to the mobile data with larger transmission power and wider area coverage and control The functions such as switching centre processed, including the transmission of resource allocation scheduling, data receiver." user equipment " refers to customer mobile terminal, example The terminal device that can be such as carried out wireless communication with base station or micro-base station including mobile phone, notebook.

Preferred embodiment is had been combined above disclosed method and the equipment being related to is described.Art technology Personnel are appreciated that method illustrated above is merely exemplary.Disclosed method is not limited to step illustrated above And sequence.Base station and user equipment illustrated above may include more modules, for example, can also include can develop or The module etc. that can be used for base station, MME or UE of person's exploitation in the future.Above shown in it is various mark be merely exemplary and It is not limiting, the disclosure is not limited to the exemplary specific cell as these marks.Those skilled in the art according to The introduction of illustrated embodiment can carry out many change and modification.

The program operated in the equipment according to the disclosure, which can be through control central processing unit (CPU), to be made to calculate The program of machine realization embodiment of the disclosure function.The program or the information handled by the program can be temporarily stored in volatibility Memory (such as random access memory ram), hard disk drive (HDD), nonvolatile memory (such as flash memory) or its In his storage system.

Program for realizing each embodiment function of the disclosure can recorde on a computer readable recording medium.It can lead to Crossing makes computer system read the program being recorded in the recording medium and executes these programs to realize corresponding function.This So-called " computer system " at place can be built-in the computer system in the equipment, may include operating system or hardware (such as peripheral equipment)." computer readable recording medium " can be semiconductor recording medium, optical record medium, magnetic recording and be situated between Matter, the in short-term recording medium of dynamic memory program or any other computer-readable recording medium.

It can be by circuit (for example, monolithic or more with the various feature or function modules of equipment in the above-described embodiments Piece integrated circuit) Lai Shixian or execution.The circuit for being designed to carry out this specification described function may include general place Reason device, digital signal processor (DSP), specific integrated circuit (ASIC), field programmable gate array (FPGA) or other can compile Any combination of journey logical device, discrete door or transistor logic, discrete hardware component or above-mentioned device.General procedure Device can be microprocessor, be also possible to any existing processor, controller, microcontroller or state machine.Foregoing circuit can To be digital circuit, it is also possible to analog circuit.There is the new of the existing integrated circuit of substitution because of the progress of semiconductor technology Integrated circuit technique in the case where, these new integrated circuit techniques also can be used in one or more other embodiments of the present disclosure To realize.

In addition, the disclosure is not limited to above-described embodiment.Although it have been described that the various examples of the embodiment, but The disclosure is not limited thereto.The fixation or non-mobile electronic equipment for being mounted on indoor or outdoors may be used as terminal device or logical Equipment is believed, such as AV equipment, cooking apparatus, cleaning equipment, air-conditioning, office equipment, automatic vending machine and other household electrical appliance Deng.

As above, embodiment of the disclosure is described in detail by reference to attached drawing.But specific structure not office It is limited to above-described embodiment, the disclosure also includes any design change without departing from disclosure purport.Furthermore it is possible in claim In the range of the disclosure is variously changed, it is obtained by being appropriately combined technological means disclosed in different embodiments Embodiment is also contained in scope of the presently disclosed technology.In addition, with the component of same effect described in above-described embodiment It can be substituted for each other.

Claims (10)

1. a kind of method executed in user equipment (UE), comprising:

Receiving time advance command TAC；

Determine subcarrier spacing SCS corresponding to received TAC；

According to identified SCS determine the TAC corresponding to TA step-length；And

The amount of time advance is determined according to the TA step-length of the determination.

2. according to the method described in claim 1, wherein determine institute received TAC corresponding to SCS include use following SCS it One as SCS corresponding to received TAC:

Default SCS；

The maximum SCS broadcasted in system information；

The maximum SCS configured in dedicated RRC signaling；

The maximum SCS configured in all uplink BWP in activated state；

Indicated SCS in subcarrier spacing common configuration information element；

Default SCS corresponding to BWP；

SCS corresponding to initial activation BWP；

The TAC, SCS indicated in RAR the or TAC MAC CE of the TAC is carried；

SCS corresponding to first uplink after receiving the TAC；

SCS corresponding to the last one uplink before receiving the TAC

The SCS of message 3 in a nearest random access procedure；

The SCS that the uplink of main plot is configured or used；And

SCS indicated by instruction information in RRC information.

3. method according to claim 1 or 2, wherein the TAC includes two kinds of TAC, described two types TAC is carried by two kinds of TAC MAC CE respectively, and the TAC MAC CE of described two types is respectively used to what UE was configured The different change situations of SCS.

4. the method that one kind executes in a base station, comprising:

The message comprising time advance order TAC is generated, wherein the message package is containing the letter for indicating SCS applied by the TAC Breath；And

Send the message.

5. the method that one kind executes in a base station, comprising:

When the subcarrier spacing SCS that user equipment (UE) is configured becomes larger or becomes larger more than certain thresholding send the first kind when Between advance command media access control control element TAC MAC CE；And

The TAC MAC of transmission Second Type when being less than certain thresholding is not changed, become smaller or larger in the SCS that UE is configured CE,

Wherein, the length of the TAC MAC CE of the first kind is greater than the length of the TAC MAC CE of Second Type.

6. a kind of user equipment (UE), comprising:

Receiving module is configured that receiving time advance command TAC；And

Processing module is configured that

Determine subcarrier spacing SCS corresponding to received TAC；

According to identified SCS determine the TAC corresponding to TA step-length；And

The amount of the time advance is determined according to the TA step-length of the determination.

7. UE according to claim 6, wherein the processing module is further configured to using one of following SCS as institute SCS corresponding to received TAC:

Default SCS；

The maximum SCS broadcasted in system information；

The maximum SCS configured in dedicated RRC signaling；

The maximum SCS configured in all uplink BWP in activated state；

Indicated SCS in subcarrier spacing common configuration information element；

Default SCS corresponding to BWP；

SCS corresponding to initial activation BWP；

The TAC, SCS indicated in RAR the or TAC MAC CE of the TAC is carried；

SCS corresponding to first uplink after receiving the TAC；

SCS corresponding to the last one uplink before receiving the TAC

The SCS of message 3 in a nearest random access procedure；

The SCS that the uplink of main plot is configured or used；

SCS indicated by instruction information in RRC information.

8. UE according to claim 6 or 7, wherein the TAC includes two kinds of TAC, described two types TAC is carried by two kinds of TAC MAC CE respectively, and the TAC MAC CE of described two types is respectively used to what UE was configured The different change situations of SCS.

9. a kind of base station, comprising:

Processing module is configured that and generates the message comprising time advance order TAC, and the message includes to indicate that the TAC is answered The information of SCS；And

Sending module is configured that and sends the message.

10. a kind of base station, comprising:

Processing module is configured that the media access control control element TAC MAC CE for generating time advance order；And

Sending module sends TAC MAC CE generated,

Wherein,

The TAC MAC generated when the subcarrier spacing SCS that user equipment (UE) is configured becomes larger or becomes larger more than certain thresholding CE is the TAC MAC CE of the first kind；

It does not change in the SCS that UE is configured, become smaller or larger that be less than certain thresholding TAC MAC CE generated be the The TAC MAC CE of two types,

Wherein, the length of the TAC MAC CE of the first kind is greater than the length of the TAC MAC CE of Second Type.