CN110971553A

CN110971553A - Method performed by user equipment and user equipment

Info

Publication number: CN110971553A
Application number: CN201811145155.9A
Authority: CN
Inventors: 罗超; 刘仁茂
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2018-09-28
Filing date: 2018-09-28
Publication date: 2020-04-07
Also published as: WO2020063478A1

Abstract

The invention provides a method executed by user equipment and the user equipment, wherein the method comprises the following steps: acquiring configuration information of parameters related to generation of an Orthogonal Frequency Division Multiplexing (OFDM) baseband signal of a physical channel or signal; and generating an OFDM baseband signal of the physical channel or signal according to the acquired configuration information of the parameter, wherein a correction parameter for correcting a frequency offset is used when the OFDM baseband signal of the physical channel or signal is generated. Therefore, resource block alignment of NR and LTE can be realized, and efficient dynamic time-frequency resource sharing between NR and LTE can be realized.

Description

Method performed by user equipment and user equipment

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a method performed by a user equipment, a method performed by a base station, and a corresponding user equipment.

Background

In 2016, a new research Project (see non-patent document 1) on the 5G technical standard was approved at 3GPP (3rd Generation Partnership Project) RAN #71 congress. The purpose of the research project is to develop a New wireless (New Radio: NR) access technology to meet all application scenarios, requirements and deployment environments of 5G. NR has mainly three application scenarios: enhanced mobile broadband Communications (eMBB), massive Machine type Communications (mMTC), and Ultra-Reliable low-latency Communications (URLLC). In 6 months 2017, at 3GPP RAN #75 times congress, the corresponding work item for 5G NR (see non-patent document 2) was approved.

The waveform (waveform) supported by 5G in the downlink direction is CP-OFDM (Cyclic Prefix orthogonal frequency Division Multiplexing), and the waveform supported in the uplink direction includes CP-OFDM and DFT-s-OFDM (Discrete Fourier transform Spread orthogonal frequency Division Multiplexing).

In 5G, CP-OFDM and DFT-s-OFDM differ in that the latter performs an operation called "transform precoding" after a layer mapping (layer mapping) operation, while the former does not.

The key parameters for CP-OFDM and DFT-s-OFDM are subcarrier spacing (subcarrier spacing) and cyclic prefix (cyclic prefix) length. In 5G, for a given waveform (e.g., CP-OFDM, or DFT-s-OFDM), the use of multiple parameter sets (numerology, which, as not specifically illustrated, refers to subcarrier spacing; and sometimes also to subcarrier spacing and cyclic prefix length) in a cell is supported. The 5G supported waveform parameter set is shown in table 1, in which two cyclic prefix types, "normal" and "extended" are defined.

Table 15G supported waveform parameter sets

μ	Δf＝2^μ·15[kHz]	Cyclic prefix (Cyclic prefix)
			0	15	Normal (Normal)
1	30	Is normal
			2	60	Normal, Extended (Extended)
3	120	Is normal
			4	240	Is normal

On a carrier (carrier) of a given transmission direction (denoted x, wherein DL denotes downlink, i.e. downlink, UL denotes uplink, i.e. uplink, or supplemental uplink), for each waveform parameter set μ (configured by a higher-level parameter, sub-carrier spacing) a resource grid (also called sub-carrier-specific carrier, SCS-specific carrier) is defined, which contains in the frequency domain a resource grid (also called sub-carrier-specific carrier) for each waveform parameter set μ (configured by a higher-level parameter, sub-carrier spacing)

Sub-carriers (i.e.

A plurality of resource blocks, each resource block comprising

Subcarriers) included in the time domain

Each OFDM symbol (i.e. the number of OFDM symbols in a subframe, specifically related to μ), where

Is referred to as oneThe number of subcarriers in a resource block (RB, which may be numbered with a common resource block or a physical resource block, etc.),

a Common Resource Block (CRB) of the lowest number of the resource grid

Configured by a high-level parameter offset ToCarrier, the number of frequency domain resource blocks

Configured by the higher layer parameter carrierBandwidth. Wherein,

common resource blocks are defined for the set of waveform parameters. For example, for μ ═ 0 (i.e., Δ f ═ 15kHz), the size of one common resource block is 15 × 12 ═ 180kHz, and for μ ═ 1 (i.e., Δ f ═ 30kHz), the size of one common resource block is 30 × 12 ═ 360 kHz.

For all waveform parameter sets, the center frequency of subcarrier 0 of common resource block 0 points to the same position in the frequency domain. This position is also called "point a".

The spacing configuration of all sub-carriers defined in a carrier and its corresponding resource grid can be configured by the parameter scs-specific carrierlist.

For each waveform parameter set, one or more "bandwidth parts" (BWP for short) may be defined. Each BWP contains one or more consecutive common resource blocks. Assuming that the number of a BWP is i, its starting point

And length

The following relationship must be satisfied simultaneously:

i.e. the common resource blocks comprised by the BWP must be located within the corresponding resource grid.

A common resource block number is used, i.e. it represents the distance (in number of resource blocks) of the lowest numbered resource block of the BWP to point "a".

Resource blocks within a BWP are also referred to as "physical resource blocks" (PRBs), which are numbered as

Wherein the physical resource block 0 is the lowest numbered resource block of the BWP and corresponds to the common resource block

The uplink and downlink BWPs used by the UE during initial access are respectively referred to as an initial effective uplink BWP (initial active uplink BWP) and an initial effective downlink BWP (initial active downlink BWP), and the uplink and downlink BWPs used during non-initial access (i.e. other than initial access) are respectively referred to as an effective uplink BWP (active uplink BWP) and an effective downlink BWP (active downlink BWP).

The number of subcarriers in one resource block is

(i.e., the lowest numbered subcarrier is subcarrier 0 and the highest numbered subcarrier is subcarrier 0

) Whether the resource block uses a common resource block number or a physical resource block number.

In the time domain, the uplink and downlink are both composed of multiple radio frames (or system frames, sometimes referred to as frames, numbered 0-1023) with a length of 10msWherein each frame comprises 10 subframes (subframe, numbered 0-9 within the frame) of length 1ms, each subframe comprising

A slot (number in a subframe) of

) And each time slot includes

One OFDM symbol. Table 2 shows different subcarrier spacing configurations

And

the value of (a). Obviously, the number of OFDM symbols within each sub-frame

TABLE 2 time-domain parameters related to subcarrier spacing configuration μ

Basic time unit of 5G is T_c＝1/(Δf_max·N_f) Wherein Δ f_max＝480·10³Hz，N_f4096. Constant k ═ T_s/T_c64 where T_s＝1/(Δf_ref·N_f，ref)，Δf_ref＝15·10³Hz，N_f，ref＝2048。

When there is no risk of confusion, the x in the subscript of a mathematical symbol indicating the transmission direction can be removed. For example, for a given downlink physical channel or signal, the use of a channel allocation table may be used

The number of resource blocks of the resource grid corresponding to the subcarrier spacing configuration mu in the frequency domain is shown.

In the existing 3GPP standard specification for 5G, the OFDM baseband signal generation formula of other Physical channels or signals besides PRACH (Physical random-access channel) can be expressed as

Wherein,

p is the antenna port.

μ is the subcarrier spacing configuration and Δ f is its corresponding subcarrier spacing, see table 1.

L is the number of OFDM symbols within one subframe,

·

·

the ratio of p to l is 0,

for l ≠ 0,

·

for an extended cyclic prefix, the cyclic prefix is extended,

for normal cyclic prefix, and l ═0 or l is 7.2^μ，

For normal cyclic prefix, and l ≠ 0 and l ≠ 7 · 2^μ，

·μ₀Is the maximum value in the subcarrier spacing configuration for the respective carrier, e.g., the maximum value in all subcarrier spacing configurations configured in the higher layer parameter scspspecificcarrierlist (also referred to as scs-SpecificCarrierList).

In the existing 3GPP standard specification for 5G, the OFDM baseband signal generation formula of PRACH can be expressed as

Wherein,

p is the antenna port.

For initial access, μ is the subcarrier spacing configuration for the initial valid upstream BWP and Δ f is its corresponding subcarrier spacing, see table 1. For non-initial access, μ is the subcarrier spacing configuration for valid uplink BWP and Δ f is its corresponding subcarrier spacing, see table 1.

·K＝Δf/Δf_RA。

·

·

·μ₀Is the maximum value among the subcarrier spacing configurations for the respective carriers, e.g., the maximum value among all the subcarrier spacing configurations configured in the higher layer parameter scsSpecificCarrierListThe value is obtained.

For the initial access, the mobile station may,

is the lowest numbered resource block of the initial valid uplink BWP. For a non-initial access the mobile station will,

is the lowest numbered resource block of the effective uplink BWP.

For the initial access, the mobile station may,

is the offset (expressed in the number of resource blocks) of the lowest-numbered resource block occupied by the lowest PRACH transmission opportunity (transmission occasion) in the frequency domain with respect to the lowest-numbered resource block (i.e., physical resource block 0) of the initial effective uplink BWP. For a non-initial access the mobile station will,

is the offset (expressed in the number of resource blocks) of the lowest-numbered resource block occupied by the lowest PRACH transmission opportunity (transmission occasion) in the frequency domain relative to the lowest-numbered resource block (i.e., physical resource block 0) of the effective uplink BWP.

·n_RAIs an index of a PRACH transmission opportunity on a frequency domain used by an OFDM baseband signal of the PRACH. One PRACH transmission described by the OFDM baseband signal of the PRACH corresponds to a PRACH transmission opportunity (n) on one frequency domain_RADescription) and one PRACH transmission opportunity in the time domain (composed of

Description).

·

Is the number of resource blocks occupied by the PRACH transmission opportunity on each frequency domain. For initial access, the number of PUSCH (Physical uplink shared channel) resource blocks on an initial effective uplink BWP is expressed; to pairIn non-initial access, the number of PUSCH resource blocks on the effective uplink BWP is expressed.

·

·

Wherein for Δ f_RAE {1.25, 5} kHz, n is 0; for Δ f_RAE {15, 30, 60, 120} kHz, n is the interval

[ and time 0 or time in one subframe

The number of ms overlaps.

For Δ f_RA∈{1.25，5，15，30}kHz，

Is the starting position of the PRACH preamble (preamble) within one subframe; for Δ f_RA∈{60，120}kHz，

Is the starting position of the PRACH preamble within one 60kHz slot.

For a value of 0, the ratio of l,

for l ≠ 0,

wherein,

■ assume that the subframe or 60kHz slot starts at t-0.

■ assume time advance N_TA＝0。

■ pairs

And

the explanation of (b) is the same as that in the OFDM baseband signal generation formula of the other Physical channel or signal than PRACH (Physical random-access channel) corresponding quantity.

■ for Δ f_RAE {1.25, 5} kHz, assuming μ ═ 0; in other cases μ is taken from Δ f_RAE {15, 30, 60, 120} kHz, see Table 1.

■

Wherein,

◆l₀from a "starting symbol" in a random access configuration.

For example, if the PRACH configuration index (PRACH configuration index) is 0, the starting symbol is 0.

◆

Is the PRACH transmission opportunity (transmission opportunity) within the PRACH time slot, which is numbered as

Wherein, for L_RA＝839，

To L_RA＝139，

Time domain PRACH opportunity within PRACH slot from random access configurationNumber "(number of time-domain PRACH occasingswithhi a PRACH slot).

◆

From the "PRACH duration" (PRACH duration) in the random access configuration.

◆ for Δ f_RA∈{1.25，5，15，60}kHz，

◆ for Δ f_RABelongs to {30, 120} kHz, and the Number of PRACH time slots in a subframe (Number of PRACH slots with a subframe) or the Number of PRACH time slots in a 60kHz time slot (Number of PRACH slots with a 60kHz slot) in the random access configuration is equal to 1, then

◆ in other cases, the flow rate of the air,

·L_RA、Δf_RA、N_uand

depending on the format of the PRACH preamble. For example, for format 0, L_RA＝839、Δf_RA＝1.25kHz、N_u＝24576κ，

·

And

is dependent on L_RA、Δf_RAΔ f. For example, for L_RA＝839，Δf_RA1.25kHz and Deltaf＝15kHz，

If the PRACH preamble format in the random access configuration is a1/B1, a2/B2 or A3/B3, then

■ if

The PRACH preamble of the corresponding B1, B2 or B3 format is transmitted in the PRACH transmission opportunity.

■ otherwise transmitting a PRACH preamble of the respective A1, A2 or A3 format in the PRACH transmission opportunity.

In contrast, the SC-FDMA baseband signal of the LTE uplink can be expressed as follows:

wherein,

·0≤t＜(N_CP，l+N)×T_s。

·N＝2048。

·T_Sis the basic time unit of LTE. T is_S1/(15000 × 2048) seconds.

·

·Δf＝15kHz。

P is the antenna port.

·

Is the content of the resource element (k, l) on antenna port p.

L is the number of SC-FDMA symbols within one uplink slot. The SC-FDMA symbols in one uplink slot must be transmitted in increasing order of l, starting at l-0. For SC-FDMA symbols with l > 0, the start time is within the slot

·

The uplink carrier bandwidth is represented by RB (resource block).

·

The RB size in the frequency domain is represented by the number of subcarriers.

For extended cyclic prefix, and l ═ 0, 1_CP，l＝512。

For normal cyclic prefix, and l ═ 0, N_CP，l＝160。

For normal cyclic prefix, and l ═ 1, 2_CP，l＝144。

In the base band signal of LTE, is introduced

Frequency shift (frequency shift). In order to make NR and LTE dynamically share time-frequency resources on the same uplink carrier frequency, NR design introduces realizable

The option of frequency offset, so that NR and LTE can achieve subcarrier alignment (subcarrier alignment). Of course, since LTE only supports Δ f of 15kHz in uplink (except PRACH), and a scenario in which NR and LTE coexist only takes into account Δ f of 15kHz (for NR, μ of 0) in this case

In particular, for some specific frequency bands, such as the SUL band and the bands n1, n2, n3, n5, n7, n8, n20, n28N66, n71, an offset Δ is introduced to the RF reference frequency of the NR uplink carrier or the supplemental uplink carrier_shift：

F_{REF_shift}＝F_REF+Δ_shift

Wherein, Delta_shiftIs determined by the high layer parameter frequency shift7p5 khz: if the parameter frequencyShift7p5khz is not configured, then Δ_shift0 kHz; if the parameter frequencyShift7p5khz is configured, Δ_shift＝7.5kHz。

It can be seen that unlike LTE, which is offset by 7.5kHz at baseband, NR is offset by 7.5kHz at the RF end.

The problem is that, as can be seen from the OFDM baseband signal generation formula for NR described above, NR also introduces the following offset at baseband which is not present in LTE:

as can be seen,

always equal to 0, and for other values of μ, i.e. when μ ≠ μ₀When the temperature of the water is higher than the set temperature,

generally not equal to 0. In particular, the number of frequency domain resource blocks of the resource grid corresponding to mu

In the case of an odd number of the groups,

is certainly not

Integer multiple of, which also means

Is certainly not

Integer multiples of, i.e.

The corresponding frequency offset is not an integer number of RBs, resulting in misalignment of the RB boundaries between the resource grid for NR corresponding to Δ f 15kHz and the LTE carriers when NR and LTE share the same uplink carrier frequency (or the uplink carrier frequencies partially overlap). Fig. 1 shows such a case where RB boundaries are not aligned. The RB boundaries are not aligned so that time-frequency resource sharing between NR and LTE is very inefficient, e.g., since one RB in LTE overlaps with two RBs (partially) in NR at the same time, when a certain RB is used in LTE, neither of the corresponding two RBs in NR can be scheduled. Therefore, there is a need to improve the way of uplink carrier frequency offset in the existing 3GPP standard specification for 5G to achieve efficient dynamic time-frequency resource sharing between NR and LTE.

Documents of the prior art

Non-patent document

Non-patent document 1: RP-160671, New SID Proposal: studio on New Radio Access technology

Non-patent document 2: RP-170855, New WID on New Radio Access Technology

Disclosure of Invention

In order to solve at least part of the above problems, the present invention provides a method performed by a user equipment and a user equipment, which can align resource blocks of NR and LTE, thereby enabling efficient dynamic time-frequency resource sharing between NR and LTE.

According to the invention, there is provided a method performed by a user equipment, comprising: acquiring configuration information of parameters related to generation of an Orthogonal Frequency Division Multiplexing (OFDM) baseband signal of a physical channel or signal; and generating an OFDM baseband signal of the physical channel or signal according to the acquired configuration information of the parameter, wherein a correction parameter for correcting a frequency offset is used when the OFDM baseband signal of the physical channel or signal is generated.

In the above method, the physical channel or signal may be a physical random access channel, PRACH, or another physical channel or signal other than the PRACH.

According to the invention, there is provided a method performed by a user equipment, comprising: acquiring configuration information of parameters related to configuration of uplink carriers or supplementary uplink carriers; determining the offset of the radio frequency RF reference frequency of the uplink carrier or the supplementary uplink carrier according to the acquired configuration information of the parameters; and applying the offset to the RF reference frequency, a correction parameter that corrects for frequency offset being utilized in determining the offset.

In the above method, the value of the correction parameter may be a predefined value, or the value of the correction parameter may be a predefined value

Or

Wherein,

equal to the frequency offset term associated with the subcarrier spacing configuration mu

Mu is₁Value of [ mu ] corresponding to₁Equal to a value selected according to a predefined rule in the subcarrier spacing configuration for the respective carrier.

In the above method, it may be that the frequency offset term

Calculated from the following formula:

wherein,

and

respectively configuring the number of the public resource block with the lowest number and the number of frequency resource blocks of the resource grid corresponding to mu at intervals of subcarriers;

and

respectively reference subcarrier spacing configuration mu₀The number of the public resource block with the lowest number and the number of the frequency resource blocks of the corresponding resource grid;

is the number of subcarriers in a resource block.

In the above method, the correction parameter may be a first constant when the given condition is not satisfied, and may be a second constant different from the first constant when the given condition is satisfied.

In the above method, it may be that the given condition includes at least one of the following conditions:

number of frequency resource blocks of resource grid

Is odd;

configuring an indication parameter for performing 7.5kHz frequency offset on uplink transmission;

the corresponding carrier of the OFDM baseband signal of the physical channel or signal, or the uplink carrier or the supplementary uplink carrier is on any frequency band of SUL, n1, n2, n3, n5, n7, n8, n20, n28, n66, n 71;

the configuration of μ ═ 0 exists in the subcarrier spacing configuration for the corresponding carrier, or the uplink carrier or the supplemental uplink carrier.

In the above method, the obtained parameters may include an indication parameter for performing a frequency offset of 7.5kHz on uplink transmission.

In the above method, the RF reference frequency may be shifted by an offset Δ_shiftBy a_shift＝S₁+S₂Is shown in which S₁0kHz when the indicating parameter is not configured and 7.5kHz when the indicating parameter is configured; s₂Is the correction parameter.

According to the present invention, there is provided a user equipment comprising: a processor; and a memory storing instructions; wherein the instructions, when executed by the processor, perform the above method.

Effects of the invention

According to the method executed by the user equipment and the user equipment, the uplink carrier frequency offset mode in the existing 3GPP standard specification about 5G is improved, the resource block alignment of NR and LTE can be realized, and the efficient dynamic time-frequency resource sharing between NR and LTE can be realized.

Drawings

The above and other features of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a diagram illustrating the existing standard specification of 3GPP for 5G

A schematic diagram of RB boundary misalignment in NR and LTE coexistence scenarios may result.

Fig. 2 is a flowchart illustrating a method performed by a user equipment according to a first embodiment of the present invention.

Fig. 3 is a flow chart illustrating a method performed by a user equipment according to a second embodiment of the present invention.

Fig. 4 is a flowchart illustrating a method performed by a user equipment according to a third embodiment of the present invention.

Fig. 5 is a flowchart illustrating a method performed by a user equipment according to a fourth embodiment of the present invention.

Fig. 6 is a block diagram showing a user equipment UE according to the present invention.

Detailed Description

The invention is described in detail below with reference to the figures and the detailed description. It should be noted that the present invention should not be limited to the specific embodiments described below. In addition, for the sake of brevity, detailed descriptions of well-known technologies not directly related to the present invention are omitted to prevent confusion of understanding of the present invention.

Embodiments according to the present invention are described in detail below with a 5G mobile communication system and its subsequent evolution as an example application environment. However, it is to be noted that the present invention is not limited to the following embodiments, but is applicable to more other wireless communication systems, such as a communication system after 5G and a 4G mobile communication system before 5G, and the like.

Some terms to which the present invention relates will be described below, and the terms to which the present invention relates are defined herein, unless otherwise specified. The terms given in the invention may adopt different naming manners in LTE, LTE-Advanced Pro, NR and the following communication systems, but the unified terms adopted in the invention can be replaced by the terms adopted in the corresponding systems when being applied to the specific systems.

3 GPP: 3rd Generation partnershift Project, third Generation Partnership Project

BWP: bandwidth Part, Bandwidth fragment

CP-OFDM: cyclic Prefix Orthogonal Frequency Division Multiplexing, Cyclic Prefix Orthogonal Frequency Division Multiplexing

CRB: common Resource Block, physical Resource Block

CSI-RS: channel-state information reference signal, Channel-state information reference signal

DCI: downlink Control Information, Downlink Control Information

DFT-s-OFDM: discrete Fourier transform Spread orthogonal frequency Division Multiplexing

DM-RS: demodulation reference signal, Demodulation reference signal

eMBB: enhanced Mobile Broadband communications

IE: information Element, Information Element

LTE: long Term Evolution, Long Term Evolution

LTE-A: long Term Evolution-Advanced, a Long Term Evolution technology upgrade

MAC: medium Access Control, Medium Access Control

MAC CE: MAC Control Element, MAC Control Element

mMTC: massive Machine Type Communication

NR: new Radio, New Radio

OFDM: orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing

PBCH: physical Broadcast Channel, Physical Broadcast Channel

PDCCH: physical Downlink Control Channel, Physical Downlink Control Channel

PDSCH: physical Downlink Shared Channel (pdcch)

PRACH: physical random-access channel, Physical random-access channel

PRB: physical Resource Block, Physical Resource Block

PT-RS: phase-tracking reference signal, Phase-tracking reference signal

PUCCH: physical Uplink Control Channel, Physical Uplink Control Channel

PUSCH: physical uplink shared channel (PRCH)

Random Access Preamble, Random Access Preamble

RB: resource Block, Resource Block

RF: radio Frequency, Radio Frequency

RRC: radio Resource Control, Radio Resource Control

SC-FDMA: single-carrier Frequency-division Multiple Access, Single Carrier Frequency division Multiple Access

SRS: sounding reference signal

And (3) SSB: SS/PBCH block, Sync Signal/physical broadcast channel Block

SUL: supplement Uplink, supplement Uplink

UE: user Equipment, User Equipment

URLLC: Ultra-Reliable and Low Latency Communication

In all the examples and embodiments of the invention, unless otherwise specified:

for initial access, "upstream BWP" refers to "initial active upstream BWP" (initial active upstream BWP). For example, the configuration may be performed by initialuplinklonbwp in uplinkConfigCommon in SIBl (System information block 1).

For non-initial access, "upstream BWP" refers to "active upstream BWP" (active uplink BWP). For example, it may be configured by uplinkBWP-ToAddModList in uplinkConfig in ServingCellConfig IE.

The use and explanation of mathematical symbols and mathematical expressions follow the prior art. For example,

■

refers to the number of sub-carriers in a resource block (e.g., a common resource block, or a physical resource block),

■

is the number of resource blocks occupied by the PRACH transmission opportunity on each frequency domain. For initial access, the number of PUSCH (Physical uplink shared channel) resource blocks on an initial effective uplink BWP is expressed; for non-initial access, the number of PUSCH resource blocks on the effective uplink BWP is expressed.

[ example one ]

In a first embodiment of the present invention, a user equipment UE performs steps including:

in step 101, configuration information of parameters related to generation of OFDM baseband signals of other physical channels or signals than PRACH is acquired. For example, the configuration information of the parameters is acquired from the base station. The parameters include:

the configuration of the resource grid corresponding to the set of waveform parameters related to the OFDM baseband signal that generates the physical channel or signal other than the PRACH.

For example, the number of the lowest-numbered common resource block of the resource grid corresponding to the subcarrier spacing configuration μ used for the OFDM baseband signal of the physical channel or signal other than the PRACH is

The number of frequency domain resource blocks is

The above-mentioned

And

can be configured respectively through the parameter offsetttocarrier and the parameter carrierBandwidth in the SCS-specific carrier IE corresponding to mu.

As another example, the reference subcarrier spacing configures μ₀The number of the lowest numbered common resource block of the corresponding resource grid is

The number of frequency domain resource blocks is

Wherein the reference subcarrier spacing configuration μ₀In a subcarrier spacing configuration for the respective carrierMaximum value, e.g., the maximum value among all subcarrier spacing configurations configured in the higher layer parameter scspspecificcarrierlist. The above-mentioned

And

can pass through mu respectively₀The parameter offsettToCarrier and the parameter carrierBandwidth in the corresponding SCS-specific Carrier IE are configured respectively.

In step 103, the OFDM baseband signals of the other physical channels or signals except the PRACH are generated according to the configuration information of the parameters related to the generation of the OFDM baseband signals of the other physical channels or signals except the PRACH. For example, the OFDM baseband signal of the physical channel or signal other than the PRACH may be a time-continuous signal (time-continuous signal)

Expressed as one of the following three formulas (referred to in order of occurrence as formula one, formula two, and formula three, respectively):

·

·

·

wherein,

p is the antenna port.

L is the number of OFDM symbols within one subframe,

·

·

the ratio of p to l is 0,

for l ≠ 0,

·

for an extended cyclic prefix, the cyclic prefix is extended,

for normal cyclic prefix, and l 0 or l 7 · 2^μ，

For normal cyclic prefix, and l ≠ 0 and l ≠ 7 · 2^μ，

·μ₀Is the maximum value in the subcarrier spacing configuration for the respective carrier, e.g., the maximum value in all subcarrier spacing configurations configured in the higher layer parameter scspspecificcarrierlist.

·k_sIs a correction parameter for correcting the frequency offset, and the unit can be kHz. k is a radical of_sThe value of (a) may be one of the following:

■k_sequal to a predefined value. For example, the predefined value is equal to 0,or

Or

Or

Or

Wherein,

◆

is equal to

I.e. substituting mu-0

The value obtained after the expression (2).

◆ if

Then since Δ f is 2^μ15kHz, used to indicate this time

Said formula one can also be expressed as

■k_sIs one of a set of predefined values. For example, k is determined according to predefined conditions or preconfigured information or indication of DCI or indication of MAC CE or indication of RRC signaling or configuration of RRC parameters_sThe value of (a).

For example, k is when the predefined condition is not satisfied_sIs absent or equal to said oneOne of a set of predefined values; k when the predefined condition is satisfied_sEqual to another one of the set of predefined values.

For example, the predefined condition may be any combination of one or more of the following in relation to "and" or ":

◆

is odd;

the ◆ parameter frequency Shift7p5khz is configured.

◆ the carrier corresponding to the OFDM baseband signal of the other physical channel or signal except the PRACH is in the SUL band or one of the bands n1, n2, n3, n5, n7, n8, n20, n28, n66, n 71.

◆ there is a configuration of μ -0 in the subcarrier spacing configuration for the respective carrier (e.g., all subcarrier spacing configurations configured in the higher layer parameter scspspecificcarrierlist).

For example, 0 may be included in the set of predefined values,

and

one or more of the above.

■

Wherein,

is equal to

I.e. mu is equal to mu₁Substitution into

The value obtained after the expression (2).

E.g. mu₁May be equal to a value, e.g., a minimum value, selected according to a predefined rule among the subcarrier spacing configurations for the respective carriers, e.g., all subcarrier spacing configurations configured in the higher layer parameter scs-specific carrier list.

■

Wherein,

is equal to

I.e. mu is equal to mu₁Substitution into

The value obtained after the expression (2).

Optionally, k_sWhether or not there is a parameter may be indicated by DCI, MAC CE, or RRC signaling, or determined by configuration of RRC parameters.

In a first embodiment of the present invention, the physical channels or signals other than the PRACH may include: PUSCH, PUCCH, SRS, PT-RS, DM-RS, CSI-RS, PSS, SSS, PDSCH, PDCCH, PBCH, etc.

According to the method of the first embodiment of the invention, the uplink carrier frequency offset mode in the existing 3GPP standard specification about 5G is improved, and the resource block alignment of NR and LTE can be realized, so that the efficient dynamic time-frequency resource sharing between NR and LTE can be realized.

[ example two ]

In the second embodiment of the present invention, the steps performed by the user equipment UE include:

in step 201, configuration information of parameters related to generation of an OFDM baseband signal of a PRACH is acquired. For example, one or more of the following parameter configuration information is obtained from the base station:

configuration of upstream BWPs. For example, the uplink BWP has a subcarrier spacing configuration of μ (corresponding subcarrier spacing is Δ f) and the lowest numbered resource block (using a common resource block number) of

Random access configuration. For example, for a paired spectrum (paired spectrum) in the frequency range 1(frequency range 1, FR1), if the PRACH Configuration Index (PRACH Configuration Index, configured by the higher layer parameter PRACH-Configuration Index, for example) is 87, the Preamble format (Preamble format) is a1, the Starting symbol (Starting symbol) is 0, the Number of PRACH slots in a subframe (Number of PRACH slots with asubbramer) is 1, the Number of time-domain PRACH opportunities with a PRACH slot within a PRACH slot (Number of time-domain PRACH-hoc,

) At 6, the PRACH duration (PRACH duration,

) Is 2.

The configuration of the resource grid corresponding to the set of waveform parameters involved in generating the OFDM baseband signal of the PRACH.

For example, the number of the lowest-numbered common resource block of the resource grid corresponding to the uplink BWP subcarrier spacing configuration μ is

The number of frequency domain resource blocks is

The above-mentioned

And

can be configured respectively through the parameter offsetttocarrier and the parameter carrierBandwidth in the SCS-specific carrier IE corresponding to mu. As another example, the reference subcarrier spacing configures μ₀The number of the lowest numbered common resource block of the corresponding resource grid is

The number of frequency domain resource blocks is

Wherein the reference subcarrier spacing configuration μ₀Is the maximum value in the subcarrier spacing configuration for the respective carrier, e.g., the maximum value in all subcarrier spacing configurations configured in the higher layer parameter scspspecificcarrierlist. The above-mentioned

And

Configuration of the lowest PRACH transmission opportunity (transmission occasion) in the frequency domain. For example, the offset (expressed as the number of resource blocks) of the lowest PRACH transmission opportunity relative to the lowest numbered resource block of the uplink BWP in the frequency domain is

For example, by a higher layer parameter msg 1-FrequencyStart.

A given time (time instance) intoNumber of PRACH transmission opportunities (transmission opportunities) for frequency-division multiplexing (FDM). For example, the number of PRACH transmission opportunities for frequency division multiplexing at a given time is M, for example, configured by a higher layer parameter msgl-FDM; correspondingly, the index n of the PRACH transmission opportunity on the frequency domain used by the OFDM baseband signal of the PRACH_RAThe value set of (a) may be {0, 1., M-1 }.

In step 203, the OFDM baseband signal of the PRACH is generated according to the configuration information of the parameter related to the generation of the OFDM baseband signal of the PRACH. For example, the OFDM baseband signal of the PRACH may be a time-continuous signal (time-continuous signal)

Is shown as

Wherein,

p is the antenna port.

·K＝Δf/Δf_RA。

·

·

For the initial access, the mobile station may,

is the lowest numbered resource block of the effective uplink BWP.

For the initial access, the mobile station may,

Description).

·

·

·

[ and time 0 or time in one subframe

The number of overlaps.

For Δ f_RA∈{1.25，5，15，30}kHz，

Is the starting position of the PRACH preamble within one 60kHz slot.

For a value of 0, the ratio of l,

for l ≠ 0,

wherein,

■ assume that the subframe or 60kHz slot starts at t-0.

■ assume time advance N_TA＝0。

■ pairs

And

■

Wherein,

◆l₀from a "starting symbol" in a random access configuration.

◆

Wherein, for L_RA＝839，

To L_RA＝139，

The "number of time domain PRACH opportunity within a PRACH slot" (number of time-domain PRACH occasionswitching a PRACH slot) from the random access configuration.

◆

From the "PRACH duration" (PRACH duration) in the random access configuration.

◆ for Δ f_RA∈{1.25，5，15，60}kHz，

◆ in other cases, the flow rate of the air,

·L_RA、Δf_RA、N_uand

·

Seed of a plant

Is dependent on L_RA、Δf_RAΔ f. For example, for L_RA＝839，Δf_RA1.25kHz and af 15kHz,

■ if

■k_sequal to a predefined value. For example, the predefined value is equal to 0, or

Or

Or

Or

Wherein,

is equal to

I.e. substituting mu-0

The value obtained after the expression (2).

■k_sIs one of a set of predefined values. E.g. according to predefined conditions or pre-configured information or DCIIndication of MAC CE or indication of RRC signaling or configuration determination of RRC parameters k_sThe value of (a).

For example, k is when the predefined condition is not satisfied_s(ii) is absent or equal to one of the set of predefined values; k when the predefined condition is satisfied_sEqual to another one of the set of predefined values.

◆

is odd;

the ◆ parameter frequency Shift7p5khz is configured.

◆ the carrier corresponding to the OFDM baseband signal of the PRACH is in the SUL band, or one of the bands n1, n2, n3, n5, n7, n8, n20, n28, n66, n 71.

◆ there is a configuration of μ ═ 0 in the subcarrier spacing configuration for the respective carrier (e.g., all subcarrier spacing configurations configured in the high layer parameter scspcificcarrierlist).

For example, 0 may be included in the set of predefined values,

and

one or more of the above.

■

Wherein,

is equal to

I.e. mu is equal to mu₁Substitution into

The value obtained after the expression (2).

■

Wherein,

is equal to

I.e. mu is equal to mu₁Substitution into

The value obtained after the expression (2).

According to the method in the second embodiment, as with the first embodiment, resource block alignment between NR and LTE can be realized, so that efficient dynamic time-frequency resource sharing between NR and LTE can be realized.

[ third example ]

In a third embodiment of the present invention, a user equipment UE performs steps including:

in step 301, configuration information of parameters related to uplink carrier or supplementary uplink carrier configuration is acquired. For example, the configuration information of the parameters is acquired from the base station. The parameters include:

an indication of a 7.5kHz frequency shift for the uplink transmission, for example configured by the parameter frequenchShift 7p5 kHz.

In step 302, determining an offset Δ of an RF reference frequency of an uplink carrier or a supplementary uplink carrier according to configuration information of the parameter related to the uplink carrier or the supplementary uplink carrier configuration_shift。

E.g. Δ_shift＝S₁+S₂. Wherein,

s if the parameter frequency Shift7p5khz is not configured₁0 kHz; if the parameter frequencyShift7p5khz is configured, S₁＝7.5kHz。

·S₂Is a correction parameter for correcting the frequency offset, and the unit can be kHz. S₂The value of (a) may be one of the following:

■S₂equal to a predefined value. For example, the predefined value is equal to 0, or

Or

Or

Or

Wherein,

is equal to

I.e. substituting mu-0

The value obtained after the expression (2).

■S₂Is one of a set of predefined values. For example, S is determined according to predefined conditions or preconfigured information or indication of DCI or indication of MAC CE or indication of RRC signaling or configuration of RRC parameters₂The value of (a).

For example, when the predefined condition is not satisfied, S₂(ii) is absent or equal to one of the set of predefined values; when the predefined condition is satisfied, S₂Equal to another one of the set of predefined values.

◆

is odd;

the ◆ parameter frequency Shift7p5khz is configured.

◆ the uplink carrier or the supplementary uplink carrier is in the SUL frequency band or one of the frequency bands n1, n2, n3, n5, n7, n8, n20, n28, n66 and n 71.

◆ there is a configuration of μ ═ 0 in the subcarrier spacing configuration (e.g., all subcarrier spacing configurations configured in the high layer parameter scspcificcarrierlist) for the upstream carrier or supplemental upstream carrier.

For example, 0 may be included in the set of predefined values,

and

one or more of the above.

■

Wherein,

is equal to

I.e. mu is equal to mu₁Substitution into

The value obtained after the expression (2).

E.g. mu₁May be equal to a value, e.g., a minimum value, selected according to a predefined rule among the subcarrier spacing configurations for the uplink carriers or supplementary uplink carriers, e.g., all subcarrier spacing configurations configured in the high layer parameter scs-specific carrier list.

■

Wherein,

is equal to

I.e. mu is equal to mu₁Substitution into

The value obtained after the expression (2).

E.g. mu₁May be equal to a value, e.g., a minimum value, selected according to a predefined rule among the subcarrier spacing configurations for the uplink carriers or supplementary uplink carriers, e.g., all subcarrier spacing configurations configured in the higher layer parameter scs-specific carrier list.

Alternatively, S₂Whether or not there is a parameter may be indicated by DCI, MAC CE, or RRC signaling, or determined by configuration of RRC parameters.

Wherein at oneIn some embodiments, the equation Δ is compared_shift＝S₁+S₂S in (1)₁And S₂The descriptions of (1) may be combined, e.g., Δ if the parameter frequency Shift7p5khz is not configured_shift0kHz (e.g. when S₁0kHz, and S₂0 kHz); if the parameter frequency Shift7p5khz is configured, then

(e.g., when S₁7.5kHz, and

)。

wherein

And

the definitions of (a) and (b) are the same as in the first embodiment, and repeated description is omitted here.

At step 303, an offset Δ is applied to the RF reference frequency_shiftFor example:

FR_{EF_shift}＝F_REF+Δ_shift

optionally, the third embodiment of the present invention is only applied to the SUL frequency band, and the frequency bands n1, n2, n3, n5, n7, n8, n20, n28, n66, and n 71.

According to the method in the third embodiment, as with the first embodiment, resource block alignment between NR and LTE can be realized, so that efficient dynamic time-frequency resource sharing between NR and LTE can be realized.

[ example four ]

In a fourth embodiment of the present invention, a user equipment UE performs the steps including:

in step 401, configuration information of parameters related to uplink carrier or supplementary uplink carrier configuration is acquired. For example, the configuration information of the parameters is acquired from the base station. The parameters include:

The resource grid configuration corresponding to all subcarrier spacing configurations and each subcarrier spacing configuration for the uplink carrier or the supplemental uplink carrier, e.g. configured by the parameter scs-specific carrierlist.

Wherein the configuration information of the parameter related to the uplink carrier or the supplementary uplink carrier configuration satisfies one or more of the following restrictions:

if the parameter scs-specific carrierlist includes the configuration related to μ ═ 0, then the number of frequency domain resource blocks of the resource grid corresponding to μ ═ 0 (frequency domain resource block number)

E.g., configured by the carrierBandwidth parameter in the SCS-specific carrier IE for which μ ═ 0 corresponds) must be even.

If the parameter frequencyShift7p5khz is already configured and the parameter scs-specific carrier list includes a configuration related to μ ═ 0, then the number of frequency domain resource blocks of the resource grid corresponding to μ ═ 0 (frequency domain resource blocks) is set to

In step 402, determining an offset Δ of an RF reference frequency of an uplink carrier or a supplementary uplink carrier according to configuration information of the parameter related to the uplink carrier or the supplementary uplink carrier configuration_shift。

For example, if the parameter frequency Shift7p5khz is not configured, Δ_shift0 kHz; if the parameter frequencyShift7p5khz is configured, Δ_shift＝7.5kHz。

At step 403, an offset Δ is applied to the RF reference frequency_shiftFor example:

F_{REF_shift}＝F_REF+Δ_shift

optionally, the fourth embodiment of the present invention is only applied to the SUL frequency band, and the frequency bands n1, n2, n3, n5, n7, n8, n20, n28, n66, and n 71.

According to the method in the fourth embodiment, resource block alignment of the NR and the LTE can be realized within a parameter configuration range allowed by the system, so that efficient dynamic time-frequency resource sharing between the NR and the LTE can be realized.

Fig. 6 is a block diagram showing a user equipment UE according to the present invention. As shown in fig. 6, the user equipment UE60 includes a processor 601 and a memory 602. The processor 601 may include, for example, a microprocessor, a microcontroller, an embedded processor, or the like. The memory 602 may include, for example, volatile memory (e.g., random access memory RAM), a Hard Disk Drive (HDD), non-volatile memory (e.g., flash memory), or other memory, among others. The memory 602 has stored thereon program instructions. Which when executed by the processor 601 may perform the above-described method performed by the user equipment as described in detail herein.

The method of the invention and the apparatus involved have been described above in connection with preferred embodiments. It will be appreciated by those skilled in the art that the above illustrated approaches are exemplary only, and that the various embodiments described above can be combined with each other without conflict. The method of the present invention is not limited to the steps or sequence shown above. The network nodes and user equipment shown above may comprise further modules, e.g. modules that may be developed or developed in the future, which may be available to a base station, MME, or UE, etc. The various identifiers shown above are exemplary only and not limiting, and the invention is not limited to the specific information elements that are examples of these identifiers. Many variations and modifications may occur to those skilled in the art in light of the teachings of the illustrated embodiments.

It should be understood that the above-described embodiments of the present invention can be implemented by software, hardware, or a combination of both software and hardware. For example, various components within the base station and the user equipment in the above embodiments may be implemented by various means, including but not limited to: analog circuit devices, Digital Signal Processing (DSP) circuits, programmable processors, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), programmable logic devices (CPLDs), and the like.

In this application, a "base station" may refer to a mobile communication data and control switching center with a large transmission power and a wide coverage area, and includes functions of resource allocation scheduling, data receiving and transmitting, and the like. "user equipment" may refer to a user mobile terminal, including, for example, a mobile phone, a notebook, etc., which may wirelessly communicate with a base station or a micro base station.

Furthermore, embodiments of the invention disclosed herein may be implemented on a computer program product. More specifically, the computer program product is one of the following: there is a computer readable medium having computer program logic encoded thereon that, when executed on a computing device, provides related operations for implementing the above-described aspects of the present invention. When executed on at least one processor of a computing system, the computer program logic causes the processor to perform the operations (methods) described in embodiments of the present invention. Such arrangements of the invention are typically provided as downloadable software images, shared databases, etc. arranged or encoded in software, code and/or other data structures on a computer readable medium such as an optical medium (e.g., CD-ROM), floppy or hard disk or other medium such as firmware or microcode on one or more ROM or RAM or PROM chips or in one or more modules. The software or firmware or such configurations may be installed on a computing device to cause one or more processors in the computing device to perform the techniques described in embodiments of the present invention.

Further, each functional block or respective feature of the base station device and the terminal device used in each of the above embodiments may be implemented or executed by a circuit, which is typically one or more integrated circuits. Circuitry designed to perform the various functions described in this specification may include a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC) or a general purpose integrated circuit, a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, or discrete hardware components, or any combination thereof. A general-purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or state machine. The general-purpose processor or each circuit described above may be configured by a digital circuit, or may be configured by a logic circuit. Further, when advanced technology capable of replacing the current integrated circuit is developed due to the advancement of semiconductor technology, the present invention can also use the integrated circuit obtained by the advanced technology.

Although the present invention has been described in conjunction with the preferred embodiments thereof, it will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention. Accordingly, the present invention should not be limited by the above-described embodiments, but should be defined by the appended claims and their equivalents.

Claims

1. A method performed by a user equipment, comprising:

acquiring configuration information of parameters related to generation of an Orthogonal Frequency Division Multiplexing (OFDM) baseband signal of a physical channel or signal; and

generating an OFDM baseband signal of the physical channel or signal according to the acquired configuration information of the parameters,

in generating the OFDM baseband signal of the physical channel or signal, a correction parameter for correcting a frequency offset is used.

2. The method of claim 1,

the physical channel or signal is a physical random access channel, PRACH, or another physical channel or signal other than the PRACH.

3. A method performed by a user equipment, comprising:

acquiring configuration information of parameters related to configuration of uplink carriers or supplementary uplink carriers;

determining the offset of the radio frequency RF reference frequency of the uplink carrier or the supplementary uplink carrier according to the acquired configuration information of the parameters; and

applying the offset to the RF reference frequency,

in determining the offset, a correction parameter for correcting the frequency offset is used.

4. The method according to claim 1 or 3,

the value of the correction parameter is a predefined value, or the value of the correction parameter is

Or

Wherein,

5. The method of claim 4,

the frequency offset term

Calculated from the following formula:

wherein,

and

and

is the number of subcarriers in a resource block.

6. The method according to claim 1 or 3,

the correction parameter is a first constant when the given condition is not satisfied, and is a second constant different from the first constant when the given condition is satisfied.

7. The method of claim 6,

the given condition includes at least one of the following conditions:

number of frequency resource blocks of resource grid

Is odd;

8. The method of claim 3,

the obtained parameters comprise an indication parameter for carrying out 7.5kHz frequency offset on uplink transmission.

9. The method of claim 8,

offset of the RF reference frequency Δ_shiftBy a_shift＝S₁+S₂It is shown that,

wherein,

S₁0kHz when the indicating parameter is not configured and 7.5kHz when the indicating parameter is configured;

S₂is the correction parameter.

10. A user equipment, comprising:

a processor; and

a memory storing instructions;

wherein the instructions, when executed by the processor, perform the method of any of claims 1 to 9.