RU2776353C1 - Method implemented by user equipment and user equipment - Google Patents

Abstract

FIELD: wireless communication.

SUBSTANCE: method includes obtaining a parameter related to the formation of a baseband signal with orthogonal frequency division multiplexing (OFDM) for a physical random access channel (PRACH); and forming an OFDM signal of the PRACH baseband in accordance with said parameter applying an expression describing the formation of a baseband OFDM signal for PRACH. The expression describing the formation of a baseband OFDM signal for PRACH includes an element indicating the location of the subcarrier with the lowest number from the resource block with the lowest number occupied by the PRACH transmission resource area in the frequency domain used by the OFDM signal of the PRACH baseband in the resource grid.

EFFECT: accurate positioning of the location of the physical random access channel (PRACH) transmission resource area in the frequency domain used by the OFDM signal of the PRACH baseband.

10 cl, 8 dwg

Description

FIELD OF THE INVENTION

[0001] The present invention relates to the field of wireless communication technology, and more specifically, to a method performed by a user equipment, a method performed by a base station, and related user equipment.

BACKGROUND OF THE INVENTION

[0002] At the March 2016 RAN Plenary Meeting No. 71 of the 3rd Generation Systems Partnership Project (3GPP), a new subject of study regarding the 5G technical standard was approved (see non-patent document 1). The aim of the research subject is to develop an access technology for a new radio network (NR) in order to meet all 5G practical application scenarios, requirements and needs of the deployment environment. NR has three main use cases: Evolved Mobile Broadband (eMBB), Massive Machine Type Communications (mMTC), and Ultra Reliable Low Latency Communications (URLLC). The 3rd Generation Partnership Project (3GPP) RAN Plenary Meeting No. 75 held in June 2017 approved the related NR 5G Working Paper (see Non-Patent Document 2).

[0003] In 5G, the signal supported in the downlink direction is CP-OFDM (Cyclic Prefix Orthogonal Frequency Division Multiplexing), and the signals supported in the uplink direction include CP-OFDM and DFT- s-OFDM (Discrete Fourier Transform Orthogonal Frequency Division Multiplexing).

[0004] In 5G, the difference between CP-OFDM and DFT-s-OFDM is that the latter performs an operation called "transform precoding" after the layer matching operation, while the former does not.

[0005] The key parameters of CP-OFDM and DFT-s-OFDM are subcarrier spacing and cyclic prefix length. In 5G, for a given signal (eg, CP-OFDM or DFT-s-OFDM) in a cell, the use of a plurality of numerical values (relating to a subcarrier interval or to a subcarrier interval and a cyclic prefix length) is supported. The numerical values of the signal supported by 5G are shown in Table 1, which defines two types of cyclic prefixes - "normal" and "extended".

Table 1. Numerical signal values supported by 5G

µ Δ f= 2 ^μ 15[kHz] Cyclic prefix 0 fifteen Normal one thirty Normal 2 60 normal, extended 3 120 Normal four 240 Normal

поднесущих (т. е.

ресурсных блоков, причем каждый ресурсный блок содержит

поднесущих) в частотной области и

символов OFDM (т. е. количество символов OFDM на подкадр со своим конкретным значением, относящимся к μ) во временной области, где

относится к количеству поднесущих в одном ресурсном блоке (называемом RB, который может быть пронумерован с общими ресурсными блоками или физическими ресурсными блоками и т. п.), и=

12. Общий ресурсный блок (CRB) с наименьшим номером из ресурсной сетки сконфигурирован параметром offsetToCarrier более высокого уровня, а количество ресурсных блоков

в частотной области сконфигурировано параметром carrierBandwidth более высокого уровня, где[0006] In a given direction of transmission of the carrier (denoted as x , where in case x =DL, this represents a downlink; in case x =UL, this represents an uplink or an additional uplink) resource the grid for each numerical value of the signal is defined and contains

subcarriers (i.e.

resource blocks, each resource block containing

subcarriers) in the frequency domain and

of OFDM symbols (i.e., the number of OFDM symbols per subframe with its particular value related to μ ) in the time domain, where

refers to the number of subcarriers in one resource block (called RB, which may be numbered with common resource blocks or physical resource blocks, etc.), and=

12. The lowest-numbered common resource block (CRB) from the resource grid is configured with the higher-level offsetToCarrier parameter, and the number of resource blocks

in the frequency domain configured by the carrierBandwidth parameter of the higher level, where

• a common resource block is defined for the numerical value of the signal, for example, for μ= 0 (i.e. Δ f= 15 kHz) the size of one common resource block is 15 × 12=180 kHz, and for μ= 1 (i.e. Δ f =30 kHz) the size of one common resource block is 30 × 12=360 kHz;

• for all signal values, the center frequency of subcarrier 0 of common resource block 0 coincides with the same location in the frequency domain. This location is also called "Point A".

и длина

должны соответствовать следующим соотношениям: [0007] For each numerical signal value, one or more "parts of bandwidth (BWP)" may be defined. Each BWP includes one or more contiguous common resource blocks. If the number of a certain BWP is assumed to be i , then its starting point

and length

must comply with the following ratios:

может использовать нумерацию общих ресурсных блоков, т. е. она представляет собой расстояние (которое может быть выражено количеством ресурсных блоков) от ресурсного блока с наименьшим номером в BWP до «точки A ».In other words, the common resource blocks included in the BWP must be within the corresponding resource grid. starting point

may use shared resource block numbering, i.e. it is the distance (which can be expressed in the number of resource blocks) from the lowest numbered resource block in the BWP to "Point A ".

где физический ресурсный блок 0 представляет собой ресурсный блок с наименьшим номером в BWP и соответствует общему ресурсному блоку

Когда UE выполняет первоначальный доступ, используемые BWP восходящей линии связи и BWP нисходящей линии связи соответственно называют начальной активной BWP восходящей линии связи и начальной активной BWP нисходящей линии связи. Когда UE выполняет непервоначальный доступ (т. е. в других условиях помимо первоначального доступа), используемые BWP восходящей линии связи и BWP нисходящей линии связи соответственно называют активной BWP восходящей линии связи и активной BWP нисходящей линии связи.[0008] Resource blocks within a BWP are also referred to as "Physical Resource Blocks (PRBs)" and are numbered from 0 to

where physical resource block 0 is the lowest numbered resource block in the BWP and corresponds to the total resource block

When the UE performs initial access, the uplink BWP and downlink BWP used are respectively called the initial active uplink BWP and the initial active downlink BWP. When the UE performs a non-initial access (ie, under conditions other than initial access), the uplink BWP and downlink BWP used are respectively referred to as the active uplink BWP and the active downlink BWP.

(т. е. поднесущая с наименьшим номером представляет собой поднесущую 0, а поднесущая с наибольшим номером представляет собой поднесущую

), независимо от того, использует ли ресурсный блок нумерацию общих ресурсных блоков или нумерацию физических ресурсных блоков.[0009] The subcarriers in a resource block are numbered from 0 to

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

), regardless of whether the resource block uses shared resource block numbering or physical resource block numbering.

интервалов (которые пронумерованы от 0 до

в подкадре), при этом каждый интервал содержит

символов OFDM. В таблице 2 показаны значения

и

при различных конфигурациях разноса поднесущих. Очевидно, что количество символов OFDM на подкадр составляет

.[0010] In the time domain, both uplink and downlink transmissions consist of multiple radio frames (otherwise referred to as system frames, sometimes simply referred to as frames, and are numbered from 0 to 1023), with each radio frame having a duration of 10 ms, where each frame contains 10 subframes (which are numbered 0 to 9 in the frame), each subframe having a duration of 1 ms, each subframe contains

intervals (which are numbered from 0 to

in a subframe), with each interval containing

OFDM symbols. Table 2 shows the values

and

with different subcarrier spacing configurations. Obviously, the number of OFDM symbols per subframe is

.

Table 2. Time domain parameters related to subcarrier spacing configuration μ

µ

0 fourteen one one fourteen 2 2 fourteen four 3 fourteen eight four fourteen 16

[0011] The basic unit time interval 5G is T _c =1 / (Δ f _max ·N _f ), where Δ f _max =480·10 ³ Hz and N _f =4096. The constant κ= T _s / T _c =64, where T _s = 1 / (Δ f _ref N _{f, ref} ), Δ f _re =15 10 ³ Hz, and N _{f, ref} =2048.

можно использовать для выражения количества ресурсных блоков ресурсной сетки, соответствующей конфигурации μ разноса поднесущих в частотной области.[0012] If there is no risk of confusion, x , which is the direction of transmission in the subscript of the mathematical symbol, can be removed. For example, for a given physical channel or downlink signal

can be used to express the number of resource blocks of the resource grid corresponding to the frequency domain subcarrier spacing configuration μ .

[0013] In the currently existing 3GPP standard specification, an expression describing baseband OFDM signal generation for any physical channel or signal other than PRACH (Physical Random Access Channel) can be expressed as:

where

p is the antenna port;

µ is the subcarrier spacing configuration, and Δf is the corresponding subcarrier spacing (see Table 1);

l is the OFDM symbol number in the subframe.

.

.

For l =0,

.For l ≠ 0,

.

.For extended cyclic prefix,

.

.For a normal cyclic prefix and l =0 or l =7 2 ^µ ,

.

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

.

µ0 is the largest value of µ of the subcarrier spacing patterns provided to the UE for the respective carrier.

[0014] In the currently existing 3GPP standard specification, an expression describing baseband OFDM signal generation for PRACH can be expressed as:

The following is observed.

p represents the antenna port.

For initial access, µ is the subcarrier spacing configuration of the initial active uplink BWP, and Δ f is the corresponding subcarrier spacing (see Table 1). For non-initial access, μ is the uplink active BWP subcarrier spacing configuration and Δ f is the corresponding subcarrier spacing (see Table 1).

µ0 is the largest value of µ of the subcarrier spacing patterns provided to the UE for the respective carrier.

представляет собой ресурсный блок с наименьшим номером (где используется нумерация общих ресурсных блоков) в начальной активной BWP восходящей линии связи. Для непервоначального доступа

представляет собой ресурсный блок с наименьшим номером (где используется нумерация общих ресурсных блоков) в активной BWP восходящей линии связи.For initial access

represents the lowest numbered resource block (where common resource block numbering is used) in the initial active uplink BWP. For non-initial access

represents the lowest numbered resource block (where common resource block numbering is used) in the active uplink BWP.

представляет собой смещение (которое выражается количеством ресурсных блоков) ресурсного блока с наименьшим номером, занятого наименьшей областью ресурсов передачи PRACH в частотной области относительно ресурсного блока с наименьшим номером (т. е. физического ресурсного блока 0) в начальной активной BWP восходящей линии связи. Для непервоначального доступа

представляет собой смещение (которое выражается количеством ресурсных блоков) ресурсного блока с наименьшим номером, занятого наименьшей областью ресурсов передачи PRACH в частотной области относительно ресурсного блока с наименьшим номером (т. е. физического ресурсного блока 0) в активной BWP восходящей линии связи.For initial access

is the offset (expressed by the number of resource blocks) of the lowest numbered resource block occupied by the smallest PRACH transmission resource area in the frequency domain relative to the lowest numbered resource block (i.e., physical resource block 0) in the initial active uplink BWP. For non-initial access

represents the offset (which is expressed in the number of resource blocks) of the lowest numbered resource block occupied by the smallest PRACH transmission resource area in the frequency domain relative to the lowest numbered resource block (i.e., physical resource block 0) in the active uplink BWP.

) в частотной области и области ресурсов передачи PRACH (описанной как

) во временной области. n _RA is an index of the PRACH transmission resource area in the frequency domain used by the PRACH baseband OFDM signal. One PRACH transmission described by the PRACH baseband OFDM signal corresponds to the PRACH transmission resource region (described as

) in the frequency and PRACH transmission resource domains (described as

) in the time domain.

представляет собой количество ресурсных блоков, занятых каждой областью ресурсов передачи PRACH в частотной области. Для первоначального доступа это выражается количеством ресурсных блоков для PUSCH (физического совместно применяемого канала для передачи данных по восходящей линии связи) в начальной активной BWP восходящей линии связи. Для непервоначального доступа это выражается количеством ресурсных блоков для PUSCH в активной BWP восходящей линии связи.

is the number of resource blocks occupied by each PRACH transmission resource area in the frequency domain. For initial access, this is expressed as the number of resource blocks for the PUSCH (Physical Uplink Shared Data Channel) in the initial active uplink BWP. For non-initial access, this is expressed as the number of resource blocks for PUSCH in the active uplink BWP.

.

.

, где для

, n=0;

, where for

, n =0;

значение n представляет собой количество наложений

интервала либо с моментом времени 0, либо с моментом

времени в подкадре.for

the value n is the number of overlaps

interval either with time 0 or with time

time in a subframe.

представляет собой начальное положение преамбулы PRACH в подкадре; для

представляет собой начальное положение преамбулы PRACH в интервале 60 кГц.

.For

represents the starting position of the PRACH preamble in the subframe; for

represents the starting position of the PRACH preamble in the 60 kHz interval.

.

; для l≠ 0

, гдеFor l =0,

; for l ≠ 0

, where

the subframe or 60 kHz interval is assumed to start at t =0.

The advance value N _TA= 0 is assumed.

и

являются такими же, как и значения в выражении, описывающем формирование сигнала OFDM основной полосы для любого физического канала или сигнала, за исключением PRACH.Definitions and related meanings

and

are the same as the values in the baseband OFDM signal generation expression for any physical channel or signal except PRACH.

, в противном случае μ получают из значений μ, соответствующих

(см. таблицу 1). µ =0 is assumed for

, otherwise μ is obtained from the values of μ corresponding to

(see table 1).

, где

, where

l ₀ is specified by the "start character" parameter in random access configurations.

For example, if the PRACH configuration index is 0, then the start symbol is 0.

представляет собой область ресурсов передачи PRACH в интервале PRACH и пронумерована от 0 до

, где для L _RA =839,

; для L _RA =139,

задается параметром «количество областей ресурсов передачи PRACH во временной области в интервале PRACH» в конфигурациях произвольного доступа.

represents the PRACH transmission resource area in the PRACH interval and is numbered from 0 to

, where for L _RA =839,

; for L _RA =139,

is set by the "number of PRACH transmission resource areas in the time domain in a PRACH slot" parameter in the random access configurations.

задается параметром «длительность PRACH» в конфигурациях произвольного доступа.

set by the "PRACH duration" parameter in the random access configurations.

, то

.If a

, then

.

или любое из «количества интервалов PRACH в пределах подкадра» или «количества интервалов PRACH в пределах интервала 60 кГц» равно 1, то

,If a

or any of "number of PRACH slots within a subframe" or "number of PRACH slots within a 60 kHz slot" is 1, then

,

.otherwise

.

зависят от формата преамбулы PRACH. Например, если формат представляет собой 0, то L _RA= 839, Δf _RA =1,25 кГц, N _u =24576κ, а=

3168κ. L _RA , Δ f _RA , N _u and

depend on the PRACH preamble format. For example, if the format is 0, then L _RA= 839, Δ f _RA =1.25 kHz, N _u =24576κ, a=

3168κ.

зависят от комбинации L _RA , Δf _RA и Δf. Например, если L _RA= 839, Δf _RA =1,25 кГц, а Δf=15 кГц, тогда

и

.

depend on the combination of L _RA , Δ f _RA and Δ f . For example, if L _RA= 839, Δ f _RA = 1.25 kHz, and Δ f = 15 kHz, then

and

.

If the PRACH preamble format in random access configurations is A1/B1, A2/B2, or A3/B3, then

, то преамбулу PRACH с соответствующим форматом B1, B2 или B3 передают в области ресурсов передачи PRACH;if

, then a PRACH preamble with the corresponding B1, B2, or B3 format is transmitted in the PRACH transmission resource region;

otherwise, a PRACH preamble with the appropriate A1, A2, or A3 format is transmitted in the PRACH transmission resource region.

[0015] In the current 3GPP standard specification, the parameter k ₁ in the expression describing baseband OFDM signal generation for PRACH is used to position the location of the lowest numbered subcarrier from the lowest numbered resource block that is occupied by the PRACH transmission resource area in the frequency used. areas in the resource grid where

соответствует поднесущей с наименьшим номером из ресурсного блока с наименьшим номером в ресурсной сетке;

corresponds to the lowest numbered subcarrier of the lowest numbered resource block in the resource grid;

представляет собой расстояние (которое выражается количеством поднесущих) между поднесущей с наименьшим номером из ресурсного блока с наименьшим номером, занятого наименьшей областью ресурсов передачи PRACH в частотной области, и поднесущей с наименьшим номером из ресурсного блока с наименьшим номером в начальной активной BWP восходящей линии связи или активной BWP восходящей линии связи;

is the distance (expressed as the number of subcarriers) between the lowest numbered subcarrier of the lowest numbered resource block occupied by the lowest PRACH transmission resource area in the frequency domain and the lowest numbered subcarrier of the lowest numbered resource block in the initial active uplink BWP, or active uplink BWP;

представляет собой расстояние (которое выражается количеством поднесущих) между поднесущей с наименьшим номером из ресурсного блока с наименьшим номером, занятого областью ресурсов передачи PRACH в частотной области, используемой сигналом OFDM основной полосы PRACH, и поднесущей с наименьшим номером из ресурсного блока с наименьшим номером, занятого наименьшей областью ресурсов передачи PRACH в частотной области;

is the distance (expressed as the number of subcarriers) between the lowest numbered subcarrier of the lowest numbered resource block occupied by the PRACH transmission resource area in the frequency domain used by the PRACH baseband OFDM signal and the lowest numbered subcarrier of the lowest numbered resource block occupied by the smallest PRACH transmission resource area in the frequency domain;

представляет собой расстояние (которое выражается количеством поднесущих) между поднесущей с наименьшим номером из ресурсного блока с наименьшим номером в начальной активной BWP восходящей линии связи или активной BWP восходящей линии связи и «точкой A».

is the distance (which is expressed in the number of subcarriers) between the lowest numbered subcarrier of the lowest numbered resource block in the initial active uplink BWP or active uplink BWP and "Point A".

[0016] FIG. 1 shows the relationship between the elements that make up k ₁ . FIG. 1, it can be seen that in the current 3GPP standard specification, parameter k ₁ can be considered as consisting of the following two elements:

соответствует поднесущей с наименьшим номером из ресурсного блока с наименьшим номером в ресурсной сетке.

corresponds to the lowest numbered subcarrier of the lowest numbered resource block in the resource grid.

соответствует расстоянию (которое выражается количеством поднесущих) между поднесущей с наименьшим номером из ресурсного блока с наименьшим номером, занятого областью ресурсов передачи PRACH в частотной области, используемой сигналом OFDM основной полосы PRACH, и «точкой A».

corresponds to the distance (which is expressed in the number of subcarriers) between the lowest numbered subcarrier of the lowest numbered resource block occupied by the PRACH transmission resource area in the frequency domain used by the PRACH baseband OFDM signal and "Point A".

[0017] Therefore, k ₁ cannot express the location of the lowest numbered subcarrier of the lowest numbered resource block that is occupied by the PRACH transmission resource area in the frequency domain used by the PRACH baseband OFDM signal in the resource grid. This can lead to a severe offset of the PRACH transmission resource region in the frequency domain used by the PRACH baseband OFDM signal relative to the assigned location. Thus, there is a need to improve the expression describing baseband OFDM signal generation for PRACH in the current 3GPP standard specification in order to accurately locate the PRACH transmission resource area in the frequency domain used by the PRACH baseband OFDM signal.

[0018] In addition, in the current 3GPP standard specifications, regardless of whether the channel is a PRACH or any physical channel or signal other than PRACH, in the expression describing baseband OFDM signal generation, it is necessary apply a reference subcarrier spacing μ ₀ , i.e., the largest value of μ of the subcarrier spacing patterns provided to the UE for the corresponding carrier. This results in two UEs using different sets of subcarrier spacing configurations possibly using different values of μ ₀ , resulting in a different understanding of the resource grid subcarrier frequency corresponding to the same subcarrier spacing μ, thus resulting in collisions of physical channels/signals transmitted by different UEs in the frequency domain. Thus, there is a need to improve the definition of μ ₀ in the currently existing 3GPP standard specification in order to eliminate possible conflicts.

[0019] Prior Art Documents

[0020] Non-Patent Documents

[0021] Non-Patent Document 1: PR-160671, New SID Proposal: Study on New Radio Access Technology

[0022] Non-Patent Document 2: PR-170855, New WID on New Radio Access Technology

SUMMARY OF THE INVENTION

[0023] In order to solve at least one part of the above problems, the present invention provides a method performed by a user equipment and a user equipment that can accurately position the location of a PRACH transmission resource area in the frequency domain used by the PRACH baseband OFDM signal.

[0024] In addition, the present invention further proposes a method performed by a user equipment and a user equipment that can improve the determination of μ ₀ in the currently existing 3GPP standard specification to avoid collisions of physical channels/signals transmitted by different UEs in the frequency domain. .

[0025] In accordance with the present invention, a method performed by a user equipment is provided, which includes obtaining a parameter related to generating an Orthogonal Frequency Division Multiplexing (OFDM) baseband signal for a Physical Random Access Channel (PRACH), and generating a baseband OFDM signal. of the PRACH according to this parameter using an expression describing the generation of the baseband OFDM signal for the PRACH, wherein the expression describing the generation of the baseband OFDM signal for the PRACH includes an element indicating the location of the lowest numbered subcarrier from the lowest numbered resource block , which is occupied by the PRACH transmission resource area in the frequency domain used by the PRACH baseband OFDM signal, in the resource grid, wherein the resource grid is the resource grid corresponding to the uplink BWP subcarrier spacing pattern µ, and the BWP ascend The downlink is the initial active uplink BWP for initial access or the active uplink BWP for non-initial access.

[0026] In the above method, the element includes the offset of the lowest numbered subcarrier from the lowest numbered resource block in the uplink BWP relative to the lowest numbered subcarrier from the lowest numbered resource block in the resource grid, and the offset is expressed by the number of subcarriers.

[0027] In the above method, the element includes the offset of the lowest numbered subcarrier of the lowest numbered resource block occupied by the PRACH transmission resource area with respect to the lowest numbered subcarrier of the lowest numbered resource block in the resource grid, and the offset is expressed by the number of subcarriers.

[0028] In the above method, the offset of the lowest numbered subcarrier of the lowest numbered resource block occupied by the PRACH transmission resource area relative to the lowest numbered subcarrier of the lowest numbered resource block in the resource grid is expressed as:

представляет собой ресурсный блок с наименьшим номером BWP восходящей линии связи, и ресурсный блок использует нумерацию общих ресурсных блоков;

представляет собой ресурсный блок с наименьшим номером в ресурсной сетке, и ресурсный блок использует нумерацию общих ресурсных блоков;

представляет собой количество поднесущих в одном ресурсном блоке;

представляет собой смещение ресурсного блока с наименьшим номером, занятого наименьшей областью ресурсов передачи PRACH в частотной области, относительно ресурсного блока с наименьшим номером в BWP восходящей линии связи, а смещение выражено количеством ресурсных блоков; n _RA представляет собой индекс области ресурсов передачи PRACH в частотной области, используемой сигналом OFDM основной полосы PRACH;

представляет собой количество ресурсных блоков, занятых каждой областью ресурсов передачи PRACH в частотной области.where

represents the resource block with the smallest uplink BWP number, and the resource block uses the numbering of common resource blocks;

represents the lowest numbered resource block in the resource grid, and the resource block uses the numbering of common resource blocks;

represents the number of subcarriers in one resource block;

is the offset of the lowest numbered resource block occupied by the smallest PRACH transmission resource area in the frequency domain relative to the lowest numbered resource block in the uplink BWP, and the offset is expressed by the number of resource blocks; n _RA is an index of the PRACH transmission resource area in the frequency domain used by the PRACH baseband OFDM signal;

is the number of resource blocks occupied by each PRACH transmission resource area in the frequency domain.

[0029] In the above method, the element is expressed as follows:

соответствует поднесущей с наименьшим номером из ресурсного блока с наименьшим номером в ресурсной сетке.where

corresponds to the lowest numbered subcarrier of the lowest numbered resource block in the resource grid.

[0030] In the above method, in the expression describing baseband OFDM signal generation for PRACH, the reference subcarrier spacing pattern μ ₀ is set as a value determined according to one or more subcarrier spacing patterns in the indication information received by the user equipment.

[0031] In the above method, the reference subcarrier spacing pattern μ ₀ is set as the subcarrier spacing pattern used by the Synchronization Signal/Physical Broadcast Channel (SSB) block.

[0032] In accordance with the present invention, a method performed by a user equipment is provided, which includes obtaining a parameter related to generating an orthogonal frequency division multiplexing (OFDM) baseband signal for a physical channel or signal, and generating a baseband OFDM signal for a physical channel or signal according to a parameter using an expression describing generation of the baseband OFDM signal for the physical channel or signal, wherein in the expression describing generation of the baseband OFDM signal for the physical channel or signal, the reference subcarrier spacing pattern μ ₀ is set as a value, determined in accordance with one or more subcarrier spacing patterns in the indication information received by the user equipment.

[0033] In the above method, the reference subcarrier spacing pattern μ ₀ is set as the subcarrier spacing pattern used by the Synchronization Signal/Physical Broadcast Channel (SSB) block.

[0034] In accordance with the present invention, a user equipment is provided that includes a processor and a memory configured to store instructions, the instructions being executed by the processor to perform the above methods.

[0035] Effect of invention

[0036] According to the method performed by the user equipment and the user equipment of the present invention, the location of the PRACH transmission area in the frequency domain used by the PRACH baseband OFDM signal can be accurately located.

[0037] In addition, in accordance with the method performed by the user equipment and the user equipment of the present invention, the definition of μ ₀ in the current 3GPP standard specification is improved to prevent collisions of physical channels/signals transmitted by different UEs in the frequency domain.

BRIEF DESCRIPTION OF GRAPHICS

[0038] The above and other features of the present invention will be better understood from the following detailed description with reference to the accompanying drawings.

[0039] FIG. 1 is a diagram showing the relationships between elements constituting k1 in an expression describing baseband OFDM signal generation for PRACH in the current 3GPP standard specification.

[0040] FIG. 2 is a flowchart illustrating the steps performed by a user equipment of the present invention to generate a PRACH baseband OFDM signal.

[0041] FIG. 3 is a flowchart illustrating the steps performed by a user equipment of the present invention to generate a baseband OFDM signal of physical channels or signals other than PRACH.

[0042] FIG. 4 is a flowchart of a method performed by a user equipment according to the first embodiment of the present invention.

[0043] FIG. 5 is a diagram showing relationships between elements constituting k1 in an expression describing the generation of a baseband OFDM signal for PRACH in the first embodiment of the present invention.

[0044] FIG. 6 is a flowchart of a method performed by a user equipment according to a third embodiment of the present invention.

[0045] FIG. 7 is a flowchart of a method performed by a user equipment according to a fourth embodiment of the present invention.

[0046] FIG. 8 is a block diagram of user equipment in accordance with the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0047] The present invention will be described in detail below with reference to the drawings and embodiments. It should be noted that the present invention is not limited to the embodiments described below. In addition, for the sake of brevity, detailed descriptions of well-known technologies that are not directly related to the present invention are omitted to prevent confusion in understanding the present invention.

[0048] In the following description, the 5G mobile communication system and its subsequent enhancements are considered as exemplary application circumstances in which several embodiments according to the present invention are described in detail. However, it should be noted that the present invention is not limited to the following embodiments, but is applicable to other wireless communication systems such as communication systems released after the 5G mobile communication system and a 4G mobile communication system released before the 5G mobile communication system.

[0049] Some of the terms used in the present invention are described below. Unless otherwise indicated, the terms used in the present invention are defined below as follows. For the terms given in the present invention, different naming conventions may be adopted in the communication systems of LTE, LTE-Advanced, LTE-Advanced Pro, NR and subsequent communication systems. The present invention uses agreed terms; however, if these terms apply to specific systems, they may be replaced by the terms adopted in the respective system.

3GPP: 3rd Generation Partnership Project

BWP: Bandwidth Part

CP-OFDM: Cyclic Prefix Orthogonal Frequency Division Multiplexing

DFT-s-OFDM: Discrete Fourier Transformation Spread Orthogonal Frequency Division Multiplexing

eMBB: Enhanced Mobile Broadband

CRB: Common Resource Block

CSI-RS: Channel-state information reference signal

DCI: Downlink Control Information

DM-RS: Demodulation reference signal

IE: Information Element

LTE-A: Long Term Evolution-Advanced

MAC: Medium Access Control

MAC CE: MAC Control Element

mMTC: massive Machine Type Communication

NR: New Radio, new radio network

OFDM: Orthogonal Frequency Division Multiplexing

PBCH: Physical Broadcast Channel

PDCCH: Physical Downlink Control Channel

PDSCH: Physical Downlink Shared Channel

PRACH: Physical Random Access Channel

PRB: Physical Resource Block

PT-RS: Phase-tracking reference signal

PUCCH: Physical Uplink Control Channel

PUSCH: Physical Uplink Shared Channel

Random Access Preamble

RB: Resource Block, resource block

RRC: Radio Resource Control

SRS: Sounding reference signal

SSB: SS/PBCH block, SS/PBCH block

UE: User Equipment

URLLC: Ultra-Reliable and Low Latency Communication

[0050] Unless otherwise indicated, the following is observed in all embodiments and examples of the methods of the present invention.

• For initial access, the term "uplink BWP" refers to "initial active uplink BWP". For example, it can be configured by initialUplinkBWP in uplinkConfigCommon in SIB1 (System Information Block 1).

• For non-initial access, the term "uplink BWP" refers to "active uplink BWP". For example, it can be configured with uplinkBWP-ToAddModList in uplinkConfig in IE ServingCellConfig.

• The offset or distance between two subcarriers (or the offset or distance of one subcarrier relative to another subcarrier) refers to the frequency offset or distance between the center frequencies of two subcarriers and is expressed as the number of subcarriers.

• The offset or distance between two resource blocks (or the offset or distance of one resource block relative to another resource block) refers to the frequency offset or distance between the center frequencies of the lowest numbered subcarriers of two resource blocks and is expressed in the number of resource blocks.

• The use and interpretation of mathematical symbols and mathematical expressions follow those used in existing technology. For example:

относится к количеству поднесущих в одном ресурсном блоке (например, общем ресурсном блоке или физическом ресурсном блоке), и=

12.▪

refers to the number of subcarriers in one resource block (eg, common resource block or physical resource block), and=

12.

представляет собой количество ресурсных блоков, занятых каждой областью ресурсов передачи PRACH в частотной области. Для первоначального доступа это выражается количеством ресурсных блоков для PUSCH (физического совместно применяемого канала для передачи данных по восходящей линии связи) в начальной активной BWP восходящей линии связи. Для непервоначального доступа это выражается количеством ресурсных блоков для PUSCH в активной BWP восходящей линии связи.▪

is the number of resource blocks occupied by each PRACH transmission resource area in the frequency domain. For initial access, this is expressed as the number of resource blocks for the PUSCH (Physical Uplink Shared Data Channel) in the initial active uplink BWP. For non-initial access, this is expressed as the number of resource blocks for PUSCH in the active uplink BWP.

[0051] FIG. 2 is a flowchart illustrating the steps performed by a UE of the present invention to generate a PRACH baseband OFDM signal, the steps performed by a user equipment UE may include the following.

[0052] In step 201, a parameter related to generating the PRACH baseband OFDM signal is obtained. For example, one or more of the following parameters may be received from the base station and may be as follows.

.• Uplink BWP configuration. For example, the subcarrier spacing pattern for the uplink BWP is μ (with the corresponding subcarrier spacing being Δ f ), and the lowest numbered resource block (using common resource block numbering) is

.

, равно 6, а длительность PRACH, т. е.

, равна 2.• Random access configuration. For example, for paired spectrum in frequency band 1 (FR1), if the PRACH configuration index (which is configured, for example, by a higher layer prach-ConfigurationIndex parameter) is 87, then the preamble format is A1, the start symbol is 0, the number of PRACH intervals within a subframe is 1, the number of PRACH transmission resource regions in the time domain within a PRACH interval, i.e.

, is 6, and the duration of PRACH, i.e.

, is equal to 2.

, а количество соответствующих ресурсных блоков в частотной области составляет

. Для другого примера нумерация общего ресурсного блока с наименьшим номером из ресурсной сетки, соответствующей конфигурации μ ₀ разноса опорных поднесущих, представляет собой

, а количество соответствующих ресурсных блоков в частотной области составляет

.

могут быть сконфигурированы соответственно посредством параметров offsetToCarrier в IE SCS-SpecificCarrier, соответствующем μ и μ ₀, а

могут быть сконфигурированы соответственно посредством параметров carrierBandwidth в IE SCS-SpecificCarrier, соответствующем µ и µ ₀.• A resource grid configuration corresponding to the numerical signal value required to generate a PRACH baseband OFDM signal. For example, the numbering of the lowest numbered common resource block from the resource grid corresponding to the uplink BWP subcarrier spacing configuration μ is

, and the number of corresponding resource blocks in the frequency domain is

. For another example, the numbering of the lowest numbered common resource block from the resource grid corresponding to the reference subcarrier spacing configuration μ ₀ is

, and the number of corresponding resource blocks in the frequency domain is

.

may be configured respectively via the offsetToCarrier parameters in the SCS-SpecificCarrier IE corresponding to μ and μ ₀ , and

may be configured accordingly via the carrierBandwidth parameters in the SCS-SpecificCarrier IE corresponding to µ and µ ₀ .

, которое сконфигурировано, например, посредством параметра msg1-FrequencyStart более высокого уровня.• The configuration of the smallest PRACH transmission resource area in the frequency domain. For example, the offset of the smallest PRACH transmission resource area in the frequency domain relative to the resource block with the smallest uplink BWP number is

, which is configured, for example, through the higher level parameter msg1-FrequencyStart.

• The number of FDMed PRACH transmission resource regions (ie, processed by frequency division multiplexing) at one particular time. For example, the number of FDMed PRACH transmission resource regions at one particular time is M , which is configured, for example, by a higher layer parameter msg1-FDM; accordingly, the set of _RA index values n of the PRACH transmission resource area in the frequency domain used by the PRACH baseband OFDM signal may be {0, 1,..., M -1}.

следующим образом:[0053] In step 203, the PRACH baseband OFDM signal is generated in accordance with a parameter related to generating the PRACH baseband OFDM signal. For example, a PRACH baseband OFDM signal can be expressed with a time-continuous signal

in the following way:

[0054] FIG. 3 is a flowchart illustrating steps performed by a UE of the present invention to generate a baseband OFDM signal of physical channels or signals other than PRACH, the steps performed by the UE include the following.

[0055] In step 301, a parameter related to baseband OFDM signal generation of physical channels or signals other than PRACH is obtained. For example, the following parameters may be received from the base station.

, а количество соответствующих ресурсных блоков в частотной области составляет

. Для другого примера нумерация общего ресурсного блока с наименьшим номером из ресурсной сетки, соответствующей конфигурации μ ₀ разноса опорных поднесущих, представляет собой

, а количество соответствующих ресурсных блоков в частотной области составляет

.

могут быть сконфигурированы соответственно посредством параметров offsetToCarrier в IE SCS-SpecificCarrier, соответствующем μ и μ ₀, а

могут быть сконфигурированы соответственно посредством параметров carrierBandwidth в IE SCS-SpecificCarrier, соответствующем µ и µ ₀.• A resource grid configuration corresponding to the numerical signal strength required to generate a baseband OFDM signal of physical channels or signals other than PRACH. For example, the numbering of the lowest numbered common resource block from the resource grid corresponding to the subcarrier spacing pattern µ used by the baseband OFDM signal of physical channels or signals other than PRACH is

, and the number of corresponding resource blocks in the frequency domain is

. For another example, the numbering of the lowest numbered common resource block from the resource grid corresponding to the reference subcarrier spacing configuration μ ₀ is

, and the number of corresponding resource blocks in the frequency domain is

.

may be configured respectively via the offsetToCarrier parameters in the SCS-SpecificCarrier IE corresponding to μ and μ ₀ , and

may be configured accordingly via the carrierBandwidth parameters in the SCS-SpecificCarrier IE corresponding to µ and µ ₀ .

следующим образом:[0056] In step 303, a baseband OFDM signal of physical channels or signals other than PRACH is generated in accordance with a parameter related to generating a baseband OFDM signal of physical channels or signals other than PRACH. For example, a baseband OFDM signal of physical channels or signals other than PRACH can be expressed with a time-continuous signal

in the following way:

[0057] Embodiments are listed below to illustrate preferred embodiments of the present invention.

[0058] [Embodiment 1]

[0059] FIG. 4 is a flowchart of a method performed by a user equipment according to the first embodiment of the present invention.

[0060] In the first embodiment of the present invention, the method performed by the user equipment UE includes the following steps.

[0061] In step 401, a parameter related to generating the PRACH baseband OFDM signal is obtained. For example, one or more of the parameters listed at step 201 in the flowchart (illustrating the steps performed by the user equipment UE to generate a PRACH baseband OFDM signal) and shown in FIG. 2 may be received from the base station.

[0062] In step 403, the baseband OFDM signal PRACH is generated in accordance with the obtained parameter using an expression describing the generation of the baseband OFDM signal for PRACH. An expression describing the formation of a baseband OFDM signal for a PRACH includes an element indicating the location of the lowest numbered subcarrier of the lowest numbered resource block that is occupied by the PRACH transmission resource area in the frequency domain used by the PRACH baseband OFDM signal in the resource grid , wherein the resource grid is the resource grid corresponding to the uplink BWP subcarrier spacing pattern μ, and the uplink BWP is the initial active uplink BWP or the active uplink BWP.

[0063] Specifically, in the expression describing the generation of the baseband OFDM signal for the PRACH, the offset (which is expressed by the number of subcarriers) of the lowest numbered subcarrier of the lowest numbered resource block occupied by the PRACH transmission resource area in the frequency domain used by the baseband OFDM signal The PRACH, relative to the lowest numbered subcarrier of the lowest numbered resource block in the resource grid corresponding to the uplink BWP subcarrier spacing configuration μ, is expressed as:

where

представляет собой ресурсный блок с наименьшим номером в BWP восходящей линии связи (где используется нумерация общих ресурсных блоков);•

represents the lowest numbered resource block in the uplink BWP (where common resource block numbering is used);

представляет собой ресурсный блок с наименьшим номером из ресурсной сетки (где используется нумерация общих ресурсных блоков);•

represents the lowest numbered resource block from the resource grid (where the numbering of common resource blocks is used);

представляет собой смещение (которое выражается количеством ресурсных блоков) ресурсного блока с наименьшим номером, занятого наименьшей областью ресурсов передачи PRACH в частотной области, относительно ресурсного блока с наименьшим номером в BWP восходящей линии связи;•

represents the offset (which is expressed in the number of resource blocks) of the lowest numbered resource block occupied by the smallest PRACH transmission resource area in the frequency domain, relative to the lowest numbered resource block in the uplink BWP;

• n _RA is an index of the PRACH transmission resource area in the frequency domain used by the PRACH baseband OFDM signal.

следующим образом:[0064] For example, a PRACH baseband signal can be expressed with a time-continuous signal

in the following way:

where

[0065] FIG. 5 is a diagram showing the relationships between the elements constituting the above parameter k ₁ in the first embodiment of the present invention. FIG. 5, it can be seen that the above parameter k ₁ in the first embodiment of the present invention can be considered to be composed of the following two elements:

соответствует поднесущей с наименьшим номером из ресурсного блока с наименьшим номером в ресурсной сетке, соответствующей конфигурации μ разноса поднесущих BWP восходящей линии связи;

corresponds to the lowest numbered subcarrier of the lowest numbered resource block in the resource grid corresponding to the uplink BWP subcarrier spacing configuration μ;

соответствует смещению (которое выражается количеством поднесущих) поднесущей с наименьшим номером из ресурсного блока с наименьшим номером, занятого областью ресурсов передачи PRACH в частотной области, используемой сигналом OFDM основной полосы PRACH, относительно поднесущей с наименьшим номером из ресурсного блока с наименьшим номером в ресурсной сетке, соответствующей конфигурации μ разноса поднесущих BWP восходящей линии связи.•

corresponds to the offset (which is expressed in the number of subcarriers) of the lowest numbered subcarrier of the lowest numbered resource block occupied by the PRACH transmission resource area in the frequency domain used by the PRACH baseband OFDM signal relative to the lowest numbered subcarrier of the lowest numbered resource block in the resource grid, corresponding configuration μ uplink BWP subcarrier spacing.

[0066] Thus, compared to FIG. 1, which shows related elements in the currently existing 3GPP standard specification, the location of the PRACH transmission resource area in the frequency domain used by the PRACH baseband OFDM signal can be accurately positioned by applying the baseband signal generation expression for the PRACH in the first embodiment of the present invention.

[0067] [Embodiment 2]

[0068] In the second embodiment of the present invention, the difference from the first embodiment of the present invention is that in the expression describing baseband OFDM signal generation for PRACH, the offset (which is expressed by the number of subcarriers) of the lowest numbered subcarrier of the lowest numbered resource block occupied by the PRACH transmission resource area in the frequency domain used by the PRACH baseband OFDM signal relative to the lowest numbered subcarrier of the lowest numbered resource block in the resource grid corresponding to configuration μ uplink BWP subcarrier spacing can be expressed as:

where

, как показано на ФИГ. 5;• X is the offset of the lowest numbered subcarrier from the lowest numbered resource block (where common resource block numbering is used) in the uplink BWP relative to the lowest numbered subcarrier from the lowest numbered resource block (where common resource block numbering is used) in the resource grid. , i.e.

as shown in FIG. 5;

представляет собой смещение (которое выражается количеством ресурсных блоков) ресурсного блока с наименьшим номером, занятого наименьшей областью ресурсов передачи PRACH в частотной области, относительно ресурсного блока с наименьшим номером в BWP восходящей линии связи;•

is an offset (which is expressed in the number of resource blocks) of the lowest numbered resource block occupied by the smallest PRACH transmission resource area in the frequency domain, relative to the lowest numbered resource block in the uplink BWP;

• n _RA is an index of the PRACH transmission resource area in the frequency domain used by the PRACH baseband OFDM signal.

следующим образом:[0069] For example, a PRACH baseband OFDM signal can be expressed with a time-continuous signal

in the following way:

where

[0070] Similar to the first embodiment of the present invention, the second embodiment according to the present invention can accurately position the location of the PRACH transmission resource area in the frequency domain used by the PRACH baseband OFDM signal.

[0071] [Embodiment 3]

[0072] FIG. 6 is a flowchart of a method performed by a user equipment according to a third embodiment of the present invention.

[0073] In the third embodiment of the present invention, the method performed by the user equipment UE includes the following steps:

[0074] In step 601, a parameter related to generating the PRACH baseband OFDM signal is obtained. For example, one or more of the parameters listed at step 201 in the flowchart (illustrating the steps performed by the user equipment UE to generate a PRACH baseband OFDM signal) and shown in FIG. 2 may be received from the base station.

[0075] In step 603, the PRACH baseband OFDM signal is generated in accordance with the obtained parameter using an expression describing the generation of the PRACH baseband OFDM signal. In an expression describing baseband OFDM signal generation for PRACH, the reference subcarrier spacing pattern μ ₀ is set to a value determined according to one or more subcarrier spacing patterns in the indication information received by the user equipment.

[0076] Specifically, in the expression describing baseband signal generation for PRACH, the reference subcarrier spacing pattern μ ₀ is identical to one of the following patterns:

• the subcarrier spacing configuration used by the SS/PBCH (SSB) block;

• subcarrier spacing configuration used by system information block 1 (SIB1); for example, the subcarrier spacing configuration used by SIB1 can be configured using the higher level subCarrierSpacingCommon parameter;

• the configuration with the largest subcarrier spacing configured in the scs-SpecificCarrierList in IE FrequencyInfoUL;

• the smallest subcarrier spacing configuration configured in scs-SpecificCarrierList in IE FrequencyInfoUL;

• the largest subcarrier spacing configuration configured in scs-SpecificCarrierList in IE FrequencyInfoDL;

• the smallest subcarrier spacing configuration configured in scs-SpecificCarrierList in IE FrequencyInfoDL.

[0077] According to the third embodiment of the present invention, since the definition of μ ₀ in the current 3GPP standard specification is improved, collisions of physical channels/signals transmitted by different UEs in the frequency domain can be avoided.

[0078] [Embodiment 4]

[0079] FIG. 7 is a flowchart of a method performed by a user equipment according to a fourth embodiment of the present invention.

[0080] In the fourth embodiment of the present invention, the method performed by the user equipment UE includes the following steps:

[0081] In step 701, a parameter related to baseband OFDM signal generation of physical channels or signals other than PRACH is obtained. For example, one or more of the parameters listed at step 301 in the flowchart (illustrating the steps performed by the user equipment UE to generate a PRACH baseband OFDM signal) and shown in FIG. 3 may be received from the base station.

[0082] In step 703, a baseband OFDM signal of physical channels or signals other than PRACH is generated in accordance with the obtained parameter using an expression describing the generation of a baseband OFDM signal for physical channels or signals other than PRACH. In an expression describing baseband OFDM signal generation for physical channels or signals other than PRACH, the reference subcarrier spacing pattern μ ₀ is set as a value determined according to one or more subcarrier spacing patterns in the indication information received by the user equipment.

[0083] In particular, in the expression describing baseband OFDM signal generation for physical channels or signals other than PRACH, the reference subcarrier spacing pattern μ ₀ is identical to one of the following patterns:

• the subcarrier spacing configuration used by the SS/PBCH (SSB) block;

• subcarrier spacing configuration used by system information block 1 (SIB1); for example, the subcarrier spacing configuration used by SIB1 can be configured using the higher level subCarrierSpacingCommon parameter;

• the configuration with the largest subcarrier spacing configured in the scs-SpecificCarrierList in IE FrequencyInfoUL;

• the smallest subcarrier spacing configuration configured in scs-SpecificCarrierList in IE FrequencyInfoUL;

• the largest subcarrier spacing configuration configured in scs-SpecificCarrierList in IE FrequencyInfoDL;

• the smallest subcarrier spacing configuration configured in scs-SpecificCarrierList in IE FrequencyInfoDL.

[0084] Similar to the third embodiment of the present invention, the fourth embodiment according to the present invention avoids collisions of physical channels/signals transmitted by different UEs in the frequency domain.

[0085] A fourth embodiment of the present invention is applicable to a user equipment UE that generates a baseband OFDM signal of physical channels or signals other than PRACH for an uplink carrier or an uplink supplemental carrier. The physical channels or signals that are generated for an uplink carrier or an uplink supplemental carrier other than PRACH may include PUSCH, PUCCH, DM-RS, PT-RS, SRS, and the like. of the fourth embodiment and related embodiments, the fourth embodiment is also applicable to a base station that generates a baseband OFDM signal of a physical channel or a signal for a downlink carrier, simply replacing "user equipment" with "base station" and replacing "with receiving from the user equipment” to “receiving from the base station”. The physical channel or signal configured for the downlink carrier may include PDSCH, PBCH, PDCCH, DM-RS, PT-RS, CSI-RS, PSS, SSS, and the like.

[0086] FIG. 8 is a block diagram of a user equipment UE according to the present invention. As shown in FIG. 8, the user equipment UE80 includes a processor 801 and a storage device 802. The processor 801 may include, for example, a microprocessor, a microcontroller, an embedded processor, and the like. The storage device 802 may include, for example, a volatile storage device (for example, , random access memory), hard disk drive (HDD), non-volatile storage device (such as flash memory), or other storage devices. Memory 802 stores program instructions. The instructions, when executed by the processor 801, may implement the aforementioned method executed by the user equipment as detailed in the present invention.

[0087] Methods and related devices in accordance with the present invention are described above in conjunction with the preferred embodiments. Those skilled in the art will appreciate that the methods described above are by way of example only, and the various embodiments described above may be combined with each other as long as there is no conflict. The methods of the present invention are not limited to the steps or sequences described above. The network nodes and user equipment described above may include more modules, such as modules that may be developed or will be developed in the future and used for base stations, MMEs or UEs, etc. The various identifiers described above are only by way of example and are non-limiting, and the present invention is not limited to specific information elements that exemplify such identifiers. Various changes and modifications may be made by those skilled in the art based on the idea of the illustrated embodiment.

[0088] It should be understood that the above embodiments of the present invention may be implemented using software, hardware, or a combination of software and hardware. For example, the various components of the base station and user equipment in the above embodiments may be implemented by a variety of devices, including, but not limited to, analog circuit devices, digital circuit devices, digital signal processor (DSP) circuits, programmable processors, application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), complex programmable logic devices (CPLDs), etc.

[0089] As used herein, the term "base station" may refer to a mobile communication and control data exchange center with higher transmission power and wider coverage area, and include functions such as resource allocation/scheduling and data reception/transmission. The term "user equipment" may refer to user mobile terminals, including, for example, terminal devices such as mobile phones, laptops, and the like, which can wirelessly communicate with base stations or micro-base stations.

[0090] In addition, the embodiments of the present invention described herein may be implemented on a computer program product. More specifically, a computer program product is a product having a computer-readable medium on which computer program logic is programmed, and when the computer program logic is executed by a computing device, it provides related operations for realizing the above technical solutions of the present invention. When executing computer program logic on at least one processor of a computing system, it instructs the processor to perform the operations (methods) described in the embodiments of the present invention. Such a configuration of the present invention is typically provided in the form of software, codes, and/or other data structures stored or encoded on a computer-readable medium such as an optical medium (e.g., CD-ROM), floppy disk, or hard disk, or provided as firmware. software or microcode in a ROM, RAM or PROM chip, or provided by downloading software images, common databases, etc. in one or more modules. Software or firmware, or a similar configuration, may be installed on a computing device such that one or more processors in the computing device perform the technical solutions described in the embodiments of the present invention.

[0091] In addition, each functional module or each function of the base station equipment and terminal equipment used in each of the above embodiments may be implemented or performed by an electrical circuit, the circuit typically being one or more integrated circuits. Circuitry capable of performing the functions described herein may include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), or general purpose integrated circuits, field programmable gate arrays (FPGAs), or other programmable logic devices, separate gate circuits or transistor logic circuits, or separate hardware components, or any combination of the above devices. 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 may be configured with a digital circuit or may be configured with a logic circuit. In addition, when an advanced technology appears that can replace the current integrated circuits due to advances in semiconductor technology, the present invention can also use integrated circuits obtained using this advanced technology.

[0092] While the present invention has been described in conjunction with the preferred embodiments of the present invention, those skilled in the art will appreciate that various modifications, substitutions, or changes may be made to the present invention without departing from the spirit and scope of the invention. Thus, the present invention should not be limited to the above-described embodiments, but should be limited to the appended claims or their equivalents.

Claims (37)

1. A method for positioning a location of a PRACH transmission resource area in a frequency domain performed by a user equipment, comprising: obtaining a parameter related to orthogonal frequency division multiplexing (OFDM) baseband signal generation for a physical random access channel (PRACH); and generating a PRACH baseband OFDM signal according to a parameter using an expression describing generating a baseband OFDM signal for PRACH, wherein the expression describing generation of the baseband OFDM signal includes an element indicating the location of the lowest numbered subcarrier of the lowest numbered resource block that is occupied by the PRACH transmission resource area in the frequency domain used by the baseband OFDM signal in the resource grid, and wherein the resource grid corresponds to the uplink BWP subcarrier spacing configuration µ, and the uplink BWP is either the initial active uplink BWP for initial access or the active uplink BWP for non-initial access. 2. The method according to p. 1, characterized in that the element includes the offset of the lowest numbered subcarrier from the lowest numbered resource block in the uplink BWP relative to the lowest numbered subcarrier from the lowest numbered resource block in the resource grid, and the offset is expressed by the number of subcarriers. 3. The method according to p. 1, characterized in that the element includes an offset of the lowest numbered subcarrier from the lowest numbered resource block occupied by the PRACH transmission resource area relative to the lowest numbered subcarrier from the lowest numbered resource block in the resource grid, and the offset is expressed by the number of subcarriers. 4. The method according to p. 3, characterized in that the offset is expressed as follows:

;

represents the lowest numbered resource block in the uplink BWP where common resource block numbering is used;

represents the lowest numbered resource block in the resource grid where common resource block numbering is used;

represents the number of subcarriers in one resource block;

is the offset of the lowest numbered resource block occupied by the smallest PRACH transmission resource area relative to the lowest numbered resource block in the uplink BWP; the offset is expressed by the number of resource blocks; n _RA is the PRACH transmission resource area index; a

is the number of resource blocks occupied by each PRACH transmission resource area in the frequency domain. 5. The method according to p. 4, characterized in that element is expressed as

, a

corresponds to the lowest numbered subcarrier of the lowest numbered resource block in the resource grid. 6. The method according to p. 1, characterized in that the reference subcarrier spacing pattern μ ₀ in an expression describing baseband OFDM signal generation is set to a value determined in accordance with one or more subcarrier spacing patterns in the indication information received by the user equipment. 7. The method according to p. 6, characterized in that the reference subcarrier spacing pattern μ ₀ is set as the subcarrier spacing pattern used by the Signal/Physical Broadcast Channel (SSB) timing block. 8. The method for positioning the location of the PRACH transmission resource area in the frequency domain, performed by the user equipment, including: obtaining a parameter related to generating an orthogonal frequency division multiplexing (OFDM) baseband OFDM signal for the physical channel, and generating a baseband OFDM signal for a physical channel according to a parameter using an expression describing generating a baseband OFDM signal for a physical channel, wherein the reference subcarrier spacing pattern μ ₀ in an expression describing baseband OFDM signal generation is set to a value determined in accordance with one or more subcarrier spacing patterns in the indication information received by the user equipment. 9. The method according to p. 8, characterized in that the reference subcarrier spacing pattern μ ₀ is set as the subcarrier spacing pattern used by the Signal/Physical Broadcast Channel (SSB) timing block. 10. User equipment, comprising: CPU; and a memory device configured to store instructions, moreover, the instructions when executed by the processor perform the method according to any one of paragraphs. 1-9.

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