CN113395773A

CN113395773A - Subcarrier interval indication method, terminal and base station

Info

Publication number: CN113395773A
Application number: CN202010177465.XA
Authority: CN
Inventors: 王俊伟; 赵锐
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2021-09-14
Anticipated expiration: 2040-03-13
Also published as: CN113395773B; WO2021179812A1

Abstract

The embodiment of the invention provides a subcarrier interval indication method, a terminal and a base station, wherein the method comprises the following steps: acquiring at least one candidate subcarrier spacing SCS adopted by a physical downlink control channel PDCCH, and receiving a physical broadcast channel PBCH sent by a base station, wherein the PBCH carries indication information for indicating a target SCS adopted by the PDCCH, and the target SCS is one of the at least one candidate SCS; and acquiring the target SCS from the at least one candidate SCS based on the indication information. The invention realizes the indication of the target SCS adopted by the PDCCH in the NR system.

Description

Subcarrier interval indication method, terminal and base station

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a subcarrier spacing indication method, a terminal, and a base station.

Background

With the development of wireless communication, people have higher and higher requirements on mobile communication, especially on communication bandwidth and communication rate, a rate of a gigabit order is expected to be achieved, and in order to meet the requirement of people on high communication rate, a frequency spectrum with a larger bandwidth needs to be developed. In the current New Radio (NR) technology of 5G, a terminal and a base station are already supported to communicate on two Frequency bands, FR1 and FR2, which are Frequency Ranges (FRs). Wherein FR1 does not range from 410MHz to 7.125 GHz; FR2 ranges from 24.25GHz to 52.6 GHz.

The current 3GPP standard starts to research mobile wireless communication in the frequency band of 52.6 GHz-71 GHz, and although higher communication frequency can bring greater bandwidth advantage, it brings greater challenge to wireless communication design, mainly that higher frequency has greater doppler frequency offset, and at the same time, greater phase noise is generated. In order to solve the influence of doppler and phase noise caused by high frequency, sub-carrier spacing (SCS) is used, for example, 240KHz, 480KHz, 960KHz, etc.

In the NR system, when a Physical Downlink Control Channel (PDCCH) with type (type) of 0 adopts a new SCS, and then adds an original SCS value (e.g., 120KHz, 60KHz), the SCS of type0-PDCCH is made to have various options. The terminal needs to know the SCS values used in the channel before detecting or receiving type0-PDCCH, and how to effectively indicate the SCS values needs to be studied and clarified.

Disclosure of Invention

The embodiment of the invention provides a subcarrier interval indication method, a terminal and a base station, which are used for indicating SCS adopted by type0-PDCCH in an NR system.

The embodiment of the invention provides a method for indicating subcarrier spacing, which comprises the following steps:

acquiring at least one candidate subcarrier spacing SCS adopted by a physical downlink control channel PDCCH, and receiving a physical broadcast channel PBCH sent by a base station, wherein the PBCH carries indication information for indicating a target SCS adopted by the PDCCH, and the target SCS is one of the at least one candidate SCS;

and acquiring the target SCS from the at least one candidate SCS based on the indication information.

the method comprises the steps of obtaining at least one candidate subcarrier spacing SCS adopted by a physical downlink control channel PDCCH, and sending a physical broadcast channel PBCH to a terminal, wherein the PBCH carries indication information for indicating a target SCS adopted by the PDCCH, and the target SCS is one of the at least one candidate SCS.

The embodiment of the invention provides a subcarrier interval indicating device, which comprises:

a first obtaining module, configured to obtain at least one candidate subcarrier spacing SCS used by a physical downlink control channel PDCCH, and receive a physical broadcast channel PBCH sent by a base station, where the PBCH carries indication information indicating a target SCS used by the PDCCH, and the target SCS is one of the at least one candidate SCS;

a second obtaining module, configured to obtain the target SCS from the at least one candidate SCS based on the indication information.

the apparatus comprises an obtaining module, configured to obtain at least one candidate subcarrier spacing SCS used by a physical downlink control channel PDCCH, and send a physical broadcast channel PBCH to a terminal, where the PBCH carries indication information indicating a target SCS used by the PDCCH, and the target SCS is one of the at least one candidate SCS.

The embodiment of the invention provides a terminal, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the program to realize the steps of the terminal side method.

The embodiment of the invention provides a base station, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the program to realize the steps of the method at the side of the base station.

An embodiment of the present invention provides a non-transitory computer readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps of the subcarrier spacing indication method.

According to the subcarrier spacing indication method, the terminal and the base station provided by the embodiment of the invention, the terminal can obtain the target SCS from at least one candidate SCS based on the indication information by obtaining at least one candidate SCS adopted by the PDCCH and receiving the PBCH sent by the base station, and the PBCH carries the indication information for indicating the target SCS adopted by the PDCCH, so that the indication of the SCS adopted by the type0-PDCCH in the NR system is realized, and the problem that the SCS of the type0-PDCCH in the frequency spectrum of 52.6GHz and above cannot be effectively indicated in the prior art is solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a flowchart illustrating steps of a subcarrier spacing indication method applied to a terminal according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating steps of a subcarrier spacing indication method applied to a base station according to an embodiment of the present invention;

fig. 3 is a block diagram of a subcarrier spacing indication apparatus applied to a terminal in an embodiment of the present invention;

fig. 4 is a block diagram of a subcarrier spacing indication apparatus applied to a base station in an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 6 is a second schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a base station in an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

For the convenience of clearly describing the technical solutions of the embodiments of the present invention, in each embodiment of the present invention, if words such as "first" and "second" are used to distinguish the same items or similar items with basically the same functions and actions, those skilled in the art can understand that the words such as "first" and "second" do not limit the quantity and execution order.

Specifically, the Synchronization Signal Block (SSB) includes a Primary Synchronization Signal (PSS), a secondary Synchronization Signal (SSB), and a Physical Broadcast Channel (PBCH), and the terminal performs synchronization search according to the PSS/SSS during cell search and receives the PBCH after completing the synchronization search. The PBCH indicates type0-PDCCH information, which mainly comprises the following three aspects: first, type 0-control resource set (CORESET) of PDCCH, such as that SCS has two options of 60KHz and 120KHz when FR2, 15KHz and 30KHz when FR1, and is indicated with 1 bit; secondly, the resource size information of the CORESET of the type0-PDCCH comprises the number of PRBs (three types of 24RB, 48RB and 96 RB) occupied on the frequency domain, the number of OFDM symbols (three types of 1, 2 and 3) occupied on the time domain, and the total of 4 bits represents 16 conditions; thirdly, 4 bits in total represent 16 cases by type 0-search space (search space) information of PDCCH, i.e. detection opportunity in time.

In addition, in the cell search process, after the terminal is started, the PSS/SSS search is firstly carried out, the PBCH information is demodulated after the PSS/SSS search is completed, the configuration information of the type0-PDCCH is read from a Master Information Block (MIB) of the PBCH, and then the terminal detects and receives the type0-PDCCH according to the configuration information. In addition, when there are multiple SCS's for the SSB, the terminal is required to traverse different candidate SCS's until PSS/SSS is searched.

In addition, after receiving the PBCH, the terminal parses the configuration of type0-PDCCH in the PBCH, and detects and receives the type0-PDCCH configuration parameters according to the configuration: PDCCH-ConfigSIB 1. Specifically, the PDCCH-ConfigSIB1 includes two parameters (control resource set control resource zero with a length of 4bit and search space searchbacezero with a length of 4 bit), where control resource set zero represents the CORESET configuration of type0-PDCCH, i.e., the size of the configured resource block (time domain length and frequency domain width), and searchbacezero represents the transmission time position of type 0-PDCCH.

For the above cell search procedure, the existing standard only determines the SCS method of type0-PDCCH in case of FR1 and FR2, which is only for SCS indication in case of two candidate SCS. However, for 52.6GHz and above, there may be 1, or two, or more candidate SCS's, which results in an inability to efficiently indicate the SCS for type0-PDCCH in the spectrum of 52.6GHz and above using existing methods. To this end, the invention provides the following examples:

as shown in fig. 1, a flowchart of a method for indicating a subcarrier spacing applied to a terminal in an embodiment of the present invention is shown, where the method includes the following steps:

step 101: and acquiring at least one candidate SCS adopted by the PDCCH, and receiving the PBCH sent by the base station.

Specifically, the PBCH carries indication information indicating a target SCS used by the PDCCH, and the target SCS is one of the at least one candidate SCS.

In addition, the PDCCH may be type 0-PDCCH.

Step 102: and acquiring the target SCS from at least one candidate SCS based on the indication information.

In this step, specifically, when receiving the PBCH, the terminal may obtain the target SCS from the obtained at least one candidate SCS based on the indication information carried in the PBCH, so as to achieve obtaining of the target SCS used by the PDCCH.

That is, in the embodiment, by acquiring at least one candidate SCS employed by the PDCCH and receiving the PBCH transmitted by the base station, and carrying the indication information indicating the target SCS employed by the PDCCH in the PBCH, the terminal can acquire the target SCS from the at least one candidate SCS based on the indication information, so that the SCS employed by the type0-PDCCH in the NR system is indicated, and the problem that the SCS of the type0-PDCCH in the spectrum of 52.6GHz and above cannot be effectively indicated in the prior art is solved.

It should be noted that: the spectrum above 52.6GHz operates, and two definitions may be adopted in the standard, one is an extension of the current FR2, i.e. the spectrum above 52.6GHz also falls within the range of FR 2. Another new name is called FR3, or FR2+ or others.

In addition, in this embodiment, when acquiring at least one candidate SCS employed by the PDCCH, the terminal may acquire at least one candidate SCS employed by the PDCCH predefined by the protocol; or receiving an indication message sent by the base station, where the indication message carries a subcarrier spacing common configuration information element parameter, and the subcarrier spacing common configuration information element parameter carries the at least one candidate SCS.

That is, at least one candidate SCS adopted by the PDCCH may be indicated in a protocol predefined manner, and at least one candidate SCS adopted by the PDCCH may also be indicated in a network side configuration manner, which is not limited herein. For example, when predefined by a protocol, the candidate SCS of PDCCH can be directly explicit when specifying the interface protocol of the base station and the terminal, such as indicating type0 in the radio frequency related interface protocol-the association between the candidate SCS of PDCCH and the operating frequency band.

In addition, specifically, the indication information may be a higher layer message or a broadcast message, for example, the broadcast message includes the following fields: type 0-PDCCH-SCS ENUMERATED { SCS240or SCS960, SCS480or SCS1920}, where ENUMERATED means an enumeration meaning that one is selected from SCS240KHz, SCS960KHz, SCS480KHz and SCS1920 KHz.

In addition, when a spectrum above 52.6GHz is named as a new Frequency Range (Frequency Range), such as FR3, in order to be compatible with the indication modes of FR1 and FR2, in the indication mode of the candidate SCS of the newly added 52.6GHz, when at least one candidate SCS is carried in the subcarrier spacing common configuration information element parameter (subcarriersspacingmom), the following may be expressed:

subanticrier spacing common estimated { SCS15or 60or SCS1, SCS30or 120or SCS2 }; wherein subcarrierspaceingcommon represents a candidate SCS defining type0-PDCCH or an SCS corresponding to CORESET referenced by type 0-PDCCH. At this time, when the terminal searches on the FR1 frequency band, its candidate SCS is 15KHz or 30 KHz; when the terminal searches on the FR2 frequency band, the candidate SCS is 60KHz or 120 KHz; when the terminal searches at 52.6GHz and above, its candidate SCS is SCS1 or SCS2, with SCS1 and SCS2 both representing candidate SCS.

Furthermore, when the spectrum multiple above 52.6GHz is considered as the extension of the current FR2, i.e. belonging to the frequency range of FR2, the newly added candidate SCS can be expressed as follows: subCrierSpacingCommon ENGERED { SCS15or {60or SCS1}, SCS30or {120or SCS2} }; wherein subcarrierspaceingcommon represents a candidate SCS defining type0-PDCCH or an SCS corresponding to CORESET referenced by type 0-PDCCH. At this time, when the terminal searches on the FR1 frequency band, its candidate SCS is 15KHz or 30 KHz; when the terminal searches on the FR2 frequency band, its candidate SCS is 60KHz or 120KHz or SCS1 or SCS 2.

It should be noted that, in the subsequent description of the present technical solution, when 52.6GHz is defined as a new frequency range, such as FR3, the candidate SCS selects one or more from 60KHz, 120KHz,240KHz, 480KHz, 960KHz and 1920 KHz.

When 52.6GHz is defined as an extension of the frequency range FR2, then the candidate SCS selects one or more from 240KHz, 480KHz, 960KHz and 1920KHz, and the selected candidate SCS and the candidate SCS supported by the original FR2 constitute a new candidate SCS. Such as: the new candidate value is 1, SCS240 KHz. The candidate SCS number indicated to the base station in PBCH is actually required to be added with the original candidate number of FR2 (60KHz, 120KHz), i.e., three in total {60KHz, 120KHz and 240KHz }.

Furthermore, the number of the at least one candidate SCS may be one or more, for example, one or more of 60KHz, 120KHz,240KHz, 480KHz, 960KHz and 1920 KHz. At this time, the at least one candidate SCS may be explained by differentiating the number of the at least one candidate SCS:

first, when the number of the at least one candidate SCS is 2, the at least one candidate SCS includes a first SCS and a second SCS in any combination of:

in the first combination, a first SCS with the smallest value and a second SCS with the largest value are selected from the N selectable SCS corresponding to the PDCCH.

Specifically, N is a positive integer greater than or equal to 2; further, for example, the optional SCS comprises at least two of: 60KHz, 120KHz,240KHz, 480KHz, 960KHz, 1920KHz, etc. Of course, it should be noted that the above-mentioned optional SCS is only an example, and the specific value of the optional SCS is not specifically limited herein.

In addition, specifically, in the scenario of 52.6GHz and above, if the optional SCS value category supported by the system exceeds 2 { for example: SCS (0), SCS (1), … SCS (N-1), where N >2, then the first SCS with the smallest value and the second SCS with the largest value in the selectable SCS can be selected as two candidate SCSs.

The following can be illustrated by the following table.

Taking PDCCH as type0-PDCCH as an example, for example, the first SCS and the second SCS may be described in the following table:

optional SCS

60KHz

120KHz

240KHz

480KHz

960KHz

1920KHz

Of optional SCS

0

1

2

3

4

5

First SCS

Candidates

Second SCS

Candidates

For another example, the first SCS and the second SCS may be described in the following tables:

optional SCS (4 ═ N)	120KHz	240KHz	480KHz	960KHz
					Indexing of optional SCS	0	1	2	3
First SCS	Candidates
					Second SCS				Candidates

optional SCS (N is 3)	120KHz	240KHz	480KHz
				Indexing of optional SCS	0	1	2
First SCS	Candidates
				Second SCS			Candidates

In this way, the first SCS with the smallest value and the second SCS with the largest value among the N selectable SCS corresponding to the PDCCH are used as the candidate SCS, so that the 2 candidate SCS can satisfy the combination requirement of the SCS with the larger value and the SCS with the smaller value, and the design requirement of the SCS with the larger value or the SCS with the smaller value can be better satisfied.

In a second combination, when N selectable SCS corresponding to PDCCH are ordered according to magnitude, the first SCS located at or adjacent to the first trisection point of N is ordered, and the second SCS located at or adjacent to the second trisection point of N is ordered.

Specifically, in the 52.6GHz and above scenarios, if the optional SCS types supported by the system exceed 2 { for example: SCS (0), SCS (1), … SCS (N-1), provided SCS (1) < SCS (2). < SCS (N) }, candidate SCS may be determined by a trisection point of the number of optional SCS.

At this time, the N selectable SCS may be sorted according to the magnitude, for example, the order may be from small to large, and then the N selectable SCS is divided into three segments according to the manner of trisection point, so that the first SCS may be the SCS on the first trisection point, and the second SCS is the SCS on the second trisection point; of course, if the value of N is not evenly divisible by 3, the SCS at the ranking position adjacent to the first trisection point may be the first SCS and the SCS at the ranking position adjacent to the second trisection point may be the second SCS. The following is a table.

optional SCS (N ═ 6)

60KHz

120KHz

240KHz

480KHz

960KHz

1920KHz

Indexing of optional SCS

0

1

2

3

4

5

First SCS

Candidates

Second SCS

Candidates

Namely, the SCS index corresponding to the first SCS is N/3, and the SCS index corresponding to the second SCS is 2N/3. Of course, when N cannot be divided by 3, the SCS index may be rounded up or rounded down, which is not limited herein.

Therefore, the candidate SCS is determined by the way of trisection points, so that the two candidate SCSs can meet the combined requirements of the SCS with a larger numerical value and the SCS with a smaller numerical value, and the design requirements of the SCS with the larger or smaller numerical value can be better met.

In the third combination, when the N selectable SCSs corresponding to the PDCCH are sorted from small to large according to the numerical value, the first SCS corresponding to the first trisection point of the N or the sorting position adjacent to the first trisection point of the N is shifted to the left by one sorting position based on the SCS corresponding to the sorting position, and the second SCS corresponding to the second trisection point of the N or the sorting position adjacent to the second trisection point of the N is sorted.

Specifically, the N selectable SCS may be sorted according to the magnitude of the value, for example, the order may be from small to large, and then the N selectable SCS is divided into three segments according to the manner of trisection points, so that the first SCS may be the SCS when the first trisection point is shifted to the left by one sort position, and the second SCS is the SCS on the second trisection point; of course, if the value of N is not evenly divisible by 3, the SCS at the sorting position adjacent to the first trisection point shifted to the left by one may be used as the first SCS, and the SCS at the sorting position adjacent to the second trisection point may be used as the second SCS. The following is a table.

optional SCS (N ═ 6)

60KHz

120KHz

240KHz

480KHz

960KHz

1920KHz

Indexing of optional SCS

0

1

2

3

4

5

First SCS

Candidates

Second SCS

Candidates

Namely, the SCS index corresponding to the first SCS is N/3-1, and the SCS index corresponding to the second SCS is 2N/3. Of course, when N cannot be divided by 3, the SCS index may be rounded up or rounded down, which is not limited herein.

In this way, the candidate SCS is determined by shifting based on the trisection point, so that the two candidate SCS can satisfy the combined requirements of the SCS with a larger value and the SCS with a smaller value, and the design requirement of the SCS with a smaller value can be better satisfied.

In a fourth combination, when N selectable SCSs corresponding to the PDCCH are sorted from small to large according to numerical values, the first SCS is sorted at a first trisection point of the N or a sorting position adjacent to the first trisection point of the N, and the second SCS is sorted at a sorting position shifted to the right by one sorting position on the basis of the SCS sorted at a second trisection point of the N or a sorting position adjacent to the second trisection point of the N.

Specifically, the N selectable SCS may be sorted according to the numerical value, for example, the order may be from small to large, and then the N selectable SCS is divided into three segments according to the manner of trisection points, so that the first SCS may be the SCS at the first trisection point, and the second SCS is the SCS when the second trisection point is shifted to the large numerical value by 1 sort position; of course, if the value of N is not evenly divisible by 3, the SCS at the ranking position adjacent to the first trisection point may be the first SCS and the SCS at the ranking position adjacent to the second trisection point shifted to the right by one ranking position may be the second SCS. The following is a table.

optional SCS (N ═ 6)

60KHz

120KHz

240KHz

480KHz

960KHz

1920KHz

Indexing of optional SCS

0

1

2

3

4

5

First SCS

Candidates

Second SCS

Candidates

that is, the SCS index corresponding to the first SCS is N/3, the SCS index corresponding to the second SCS is 2N/3+1, and the maximum index value corresponding to the second SCS is N-1. Of course, when N cannot be divided by 3, the SCS index may be rounded up or rounded down, which is not limited herein.

In this way, the candidate SCS is determined by shifting based on the trisection point, so that the two candidate SCS can satisfy the combined requirements of the SCS with a larger value and the SCS with a smaller value, and the design requirement of the SCS with a larger intermediate bias can be better satisfied.

The second step is as follows: when the number of the at least one candidate SCS is 3, the at least one candidate SCS includes a first SCS, a second SCS, and a third SCS in any combination of:

in the first combination, when the N selectable SCSs corresponding to the PDCCH are sorted from small to large according to the numerical values, the first SCS with the smallest numerical value, the second SCS which is located at the first trisection point of the N or at the sorting position adjacent to the first trisection point of the N and the third SCS which is located at the second trisection point of the N or at the sorting position adjacent to the second trisection point of the N are sorted.

Specifically, N is a positive integer greater than or equal to 3, for example, the optional SCS includes at least three of the following: 60KHz, 120KHz,240KHz, 480KHz, 960KHz and 1920 KHz. It should be noted that, of course, the above-mentioned optional SCS is only an example, and the specific value of the optional SCS is not specifically limited herein.

Further, specifically, in the scenario of 52.6GHz and above, if the number of selectable SCS of the channel/signal is greater than 3 { for example: SCS (0), SCS (1), … SCS (N-1), provided SCS (1) < SCS (2). < SCS (N) }, candidate SCS may be determined by a trisection point of the number of optional SCS.

At this time, the N selectable SCS may be sorted according to the numerical value, for example, the order may be from small to large, and then the N selectable SCS is divided into three segments according to the trisection point, so that the first SCS may be the SCS with the smallest numerical value, the second SCS may be the SCS on the first trisection point, and the third SCS is the SCS on the second trisection point; of course, if the value of N is not evenly divisible by 3, the SCS at the ranking position adjacent to the first trisection point may be taken as the second SCS, and the SCS at the ranking position adjacent to the second trisection point may be taken as the third SCS. The following is a table.

Taking PDCCH as type0-PDCCH as an example, for example, the first, second and third SCS may be described in the following table:

optional SCS (N ═ 6)

60KHz

120KHz

240KHz

480KHz

960KHz

1920KHz

Indexing of optional SCS

0

1

2

3

4

5

First SCS

Candidates

Second SCS

Candidates

Third SCS

Candidates

I.e. three candidate SCS's of 60KHz, 240KHz and 960KHz, respectively.

For another example, the first, second, and third SCS may be described in the following tables:

optional SCS (4 ═ N)	120KHz	240KHz	480KHz	960KHz
					Indexing of optional SCS	0	1	2	3
First SCS	Candidates
					Second SCS		Candidates
Third SCS			Candidates

That is, the first SCS is the SCS with the smallest value, the index of SCS corresponding to the second SCS is N/3, and the index of SCS corresponding to the third SCS is 2N/3. Of course, when N cannot be divided by 3, the indexes of the second SCS and the third SCS may be rounded up or rounded down, which is not limited herein.

Thus, the three candidate SCSs are determined through the method, and the design requirement of low SCS can be well met.

In the second combination, when the N selectable SCSs corresponding to the PDCCH are sorted from small to large according to the numerical values, the first SCS with the largest numerical value, the second SCS which is arranged at the first trisection point of the N or at the sorting position adjacent to the first trisection point of the N, and the third SCS which is arranged at the second trisection point of the N or at the sorting position adjacent to the second trisection point of the N are sorted.

Specifically, the determination of this method may refer to the candidate SCS determination method in one of the above methods, which is not described herein again in detail, and is only exemplified by the following table:

optional SCS (N ═ 6)

60KHz

120KHz

240KHz

480KHz

960KHz

1920KHz

Indexing of optional SCS

0

1

2

3

4

5

First SCS

Candidates

Second SCS

Candidates

Third SCS

Candidates

As can be seen from the above table, the second SCS and the third SCS may also be uniformly distributed in SCS other than the first SCS among the alternative SCS, i.e. three candidate SCS are 1920KHz, 120KHz and 480KHz, respectively.

I.e. three candidate SCS are 960KHz, 240KHz and 480KHz, respectively.

Therefore, the three candidate SCSs are selected through the method, and the design requirement of high SCS can be well met.

In the third combination, when the N selectable SCSs corresponding to the PDCCH are ordered from small to large according to the numerical values, the first SCS with the minimum numerical value, the second SCS with the maximum numerical value and the third SCS are ordered and positioned at the bisection point of the N or the ordering position adjacent to the bisection point of the N.

Specifically, in this manner, the highest selectable SCS and the lowest selectable SCS supported by the system may be used as the first SCS and the second SCS, and the SCS in the middle of the N selectable SCS may be used as the third SCS.

optional SCS (N ═ 6)

60KHz

120KHz

240KHz

480KHz

960KHz

1920KHz

Indexing of optional SCS

0

1

2

3

4

5

First SCS

Candidates

Second SCS

Candidates

Third SCS

Candidates

It should be noted that the third SCS may also be 480 KHz.

it should be noted that the third SCS may also be 480 KHz.

Thus, three candidate SCSs are selected in the above manner, and the design requirements of high SCS and low SCS can be completely met.

Thirdly, when the number of the at least one candidate SCS is 4, the at least one candidate SCS includes a first SCS, a second SCS, a third SCS, and a fourth SCS in any combination of the following:

a first combination of: when N selectable SCSs corresponding to the PDCCH are sorted from small to large according to the numerical values, a first SCS with the smallest numerical value, a second SCS which is located at a first quartering point of the N or at a sorting position adjacent to the first quartering point of the N, a third SCS which is located at a second quartering point of the N or at a sorting position adjacent to the second quartering point of the N, and a fourth SCS which is located at a third quartering point of the N or at a sorting position adjacent to the third quartering point of the N are sorted;

a second combination of: when the N selectable SCSs corresponding to the PDCCH are sorted from small to large according to the numerical values, the first SCS with the largest numerical value, the second SCS which is arranged at the first quartering point of the N or at the sorting position adjacent to the first quartering point of the N, the third SCS which is arranged at the second quartering point of the N or at the sorting position adjacent to the second quartering point of the N, and the fourth SCS which is arranged at the third quartering point of the N or at the sorting position adjacent to the third quartering point of the N

In a third combination: when the N selectable SCSs corresponding to the PDCCH are sorted from small to large according to the numerical values, a first SCS with the smallest numerical value, a second SCS with the largest numerical value, a third SCS arranged at a first trisection point of the N or a sorting position adjacent to the first trisection point of the N, and a fourth SCS arranged at a second trisection point of the N or a sorting position adjacent to the second trisection point of the N are sorted;

wherein N is a positive integer greater than or equal to 4; for example, the optional SCS comprises at least four of: 60KHz, 120KHz,240KHz, 480KHz, 960KHz and 1920 KHz. It is understood that this is by way of example only and is not intended as limiting.

It should be noted that, the case where the number of the at least one candidate SCS is 4 may refer to the case where the number of the at least one candidate SCS is 3, and details are not repeated here.

It should be noted that, when the number of the at least one candidate SCS is 3 or 4, the at least one candidate SCS is located in two groups and each group includes at most two candidate SCS.

For example, when the number of candidate SCS is 3, the 3 SCS are divided into two groups, where group 1 is { SCS1, SCS2}, group 2 is { SCS3}, or group 1 is { SCS1}, and group 2 is { SCS2, SCS3 }; when the number of the candidate SCS is 4, the 4 SCS are divided into two groups, where group 1 is { SCS1, SCS2}, and group 2 is { SCS3, SCS4 }.

Fourthly, at least one candidate SCS comprises any one of the following items:

the first item: at least one candidate SCS is associated with the SCS of the synchronization signal block SSB;

specifically, in a specific frequency band, the candidate SCS of the PDCCH is associated with the SCS of the SSB, and at this time, the candidate SCS of the PDCCH may correspond to the searched SCS of the SSB one-to-one, and certainly, may have a preset mapping relationship, which is not limited herein.

For example, assuming that the PDCCH is type0-PDCCH and the number of candidate SCS is 1, the relationship between the candidate SCS and the SCS of the SSB can be shown in the following table,

	120KHz	240KHz	480KHz	960KHz
					SSB:60KHz	candidates
SSB:120KHz		Candidates
					SSB:240KHz		Candidates

That is, after the terminal performs the search and reception of the SSB, the SCS of the SSB can be obtained, and at this time, the candidate SCS of type0-PDCCH can be obtained, for example, when the SCS of the SSB is 240KHz, the candidate SCS of type0-PDCCH is 480 KHz.

For another example, in a specific frequency band, the SCS of one SSB corresponds to two candidate SCS, for example, as shown in the following table:

	120KHz	240KHz	480KHz	960KHz	1920KHz
						SSB:60KHz	candidates	Candidates
SSB:120KHz		Candidates	Candidates
						SSB:240KHz			Candidates	Candidates
SSB:480KHz				Candidates	Candidates

Of course, it should be noted here that the above-mentioned manner of determining 2 candidate SCS may be adopted when determining the candidate SCS associated with the SCS of the SSB, such as when the SCS of the SSB is 120KHz, the candidate SCS of type0-PDCCH is 240KHz and 480KHz, and further such as: when SCS of SSB is 240KHz, candidate SCS of type0-PDCCH are 480KHz and 960 Khz. The following steps are repeated: when the SCS of the SSB is 480KHz, the candidate SCSs of type0-PDCCH are 960KHz and 1920 KHz.

This enables the network to flexibly configure SCS parameters of the PDCCH and reduce the information overhead for indicating candidate SCS by determining at least one candidate SCS in a manner associated with the SCS of the SSB.

The second term is: at least one candidate SCS is associated with an operating frequency band;

specifically, at least one candidate SCS may be further associated with an operating frequency band, for example, when the frequency spectrum is greater than 52.6GHz, the frequency spectrum is divided into N frequency bands (N is an integer greater than or equal to 1), each frequency band is set with a frequency point, when the terminal searches for an SSB on the corresponding operating frequency band, the candidate SCS of Type0-PDCCH may correspond to 1 or more values, and the corresponding method may be determined by a protocol. The candidate SCS determined by the interface protocol is specifically shown in the following table:

frequency numbering	Frequency range	Type 0-SCS candidate for PDCCH
			FR2100	52.6-54.25	120KHz，240KHz
FR2101	54.25-55.78	120KHz，240KHz，480KHz
			FR2102	55.78-56.9	240KHz，480KHz
FR2103	56.9-57	240KHz，480KHz
			FR2104	57-58.2	240KHz，960KHz
FR2105	58.2-59	240KHz，480KHz，960KHz
			FR2106	59-59.3	480KHz，960KHz
FR2107	59.3-64	480KHz，960KHz
			FR2108	64-65	960KHz
FR2109	65-66	960KHz，1920KHz

That is, when the cell of the base station transmits type0-PDCCH in a specific certain operating frequency band, its candidate SCS can be selected from the corresponding SCS in the above table. For example, for FR2100, its type 0-candidate SCS of PDCCH has two kinds of 120KHz,240 KHz; for FR2108, for another example, there is 960KHz for candidate SCS for type 0-PDCCH.

The third item: at least one candidate SCS is associated with the SCS of the SSB and the operating frequency band.

Specifically, at least one candidate SCS may be determined by the SCS of the SSB and the operating frequency band, respectively.

For example, suppose that a frequency band greater than 52.6GHz is divided into several operating frequency bands, numbered from FR2100 to FR2109, where each operating frequency band is associated with SCS of an SSB first, and then SCS of each SSB is associated with candidate SCS of PDCCH. This can be shown, for example, in the following table:

that is, when the cell of the base station is in a specific operating frequency band, the SCS of the SSB is selected first, and then the candidate SCS is selected according to the SCS of the SSB. For example, when the terminal searches on FR2100, the SSB is searched first, and the SCS for searching SSB has 120KHz and 240 KHz; at this time, if the searched SCS of the SSB is 120KHz, the candidate SCSs of type0-PDCCH have 120KHz and 240 KHz; if the SCS of the searched SSB is 240KHz, then the candidate SCSs of type0-PDCCH have 240KHz and 480 KHz. For another example, when the terminal searches on FR2104, the SSB is searched first, and the SCS for searching SSB has 480KHz and 960 KHz; at this time, if the searched SCS of the SSB is 480KHz, the candidate SCSs of type0-PDCCH have 480KHz and 960 KHz; if the searched SCS of the SSB is 960KHz, the candidate SCS of type0-PDCCH has 960 KHz.

In addition, in the present embodiment, when the target SCS used in the PDCCH is indicated by the indication information, the indication information may be designed for the number of candidate SCS, which will be described below:

first, when the number of at least one candidate SCS is 1, the indication information is 1-bit information, and is further configured to indicate at least one of the following:

indicating whether the base station supports the preset terminal capability;

indicating whether the base station supports the preset service;

and indicating a channel interception mode configured by the base station when the spectrum is not authorized, wherein the channel interception mode comprises a static interception mode and a non-static interception mode.

That is, when the number of candidate SCS is 1, the indication information may indicate a default target SCS, and at least one of the above information may be indicated by the indication information; for example, when indicating whether the base station supports the preset terminal capability, 0 indicates that the terminal supporting the preset terminal capability is accessed, and 1 indicates that the terminal not supporting the preset terminal capability is accessed; for another example, when indicating whether the base station supports the preset service, the preset service may be a low-latency high-reliability service or a broadcast multicast service, for example, 0 indicates that the preset service is supported, and 1 indicates that the preset service is not supported; for another example, when the channel sensing scheme configured by the base station is indicated when the unlicensed spectrum is not available, 0 indicates that the static channel sensing scheme is used, and 1 indicates that the non-static channel sensing scheme is used.

Secondly, when the number of at least one candidate SCS is 2, the indication information is 1-bit information.

Wherein the target SCS adopted by the PDCCH is indicated as a first SCS when the value of the 1-bit information is a first preset value, and the target SCS adopted by the PDCCH is indicated as a second SCS when the value of the 1-bit information is a second preset value.

Specifically, the first SCS and the second SCS are both SCS of the candidate SCS. In this case, the target SCS may be indicated as the first SCS when the value of the 1-bit information is 0 and indicated as the second SCS when the value of the 1-bit information is 1.

Thirdly, when the number of at least one candidate SCS is 3 or 4, the indication information is 2-bit information;

specifically, the target SCS used by the PDCCH is indicated as a first SCS when the numerical combination of the 2-bit information is a first combination, the target SCS used by the PDCCH is indicated as a second SCS when the numerical combination of the 2-bit information is a second combination, the target SCS used by the PDCCH is indicated as a third SCS when the numerical combination of the 2-bit information is a third combination, and the target SCS used by the PDCCH is indicated as a fourth SCS when the numerical combination of the 2-bit information is a fourth combination.

That is, in this manner, the target SCS is indicated by using 2-bit information, for example, 00 in the 2-bit information indicates that the target SCS is the first SCS in the candidate SCS, 01 indicates that the target SCS is the second SCS in the candidate SCS, 10 indicates that the target SCS is the third SCS in the candidate SCS, and 11 indicates that the target SCS is the fourth SCS in the candidate SCS.

Fourthly, when the number of the at least one candidate SCS is 3 or 4, and the at least one candidate SCS is located in two groups and each group comprises at most two candidate SCSs, the indication information comprises first indication information and second indication information.

The first indication information is 1-bit information and is used for indicating the grouping where the target SCS is located;

the second indication information is 1-bit PBCH reservation information used for indicating the position of the target SCS in the packet where the target SCS is located; or, the second indication information is a state combination corresponding to the control resource set parameter indicated by the PBCH or a state combination corresponding to the search space, where a first state combination in the state combinations indicates that the target SCS is the first SCS in the group where the target SCS is located, and a second state combination in the state combinations indicates that the target SCS is the second SCS in the group where the target SCS is located.

This mode will be described below by way of example.

It is assumed that the number of candidate SCS is 3, and the 3 SCS are divided into two groups, where group 1 is { SCS1, SCS2}, and group 2 is { SCS3 }. At this time, the first indication information is 1-bit information, for example, 1bit in the MIB indicates the adopted SCS group, and 0 may be adopted to represent group 1, and 1 may be adopted to represent group 2. It is assumed that group 1 is indicated in the present embodiment.

Then, the target SCS is distinguished by using a "control channel system message block 1(PDCCH-ConfigSIB 1)" parameter, and in this case, the second indication information may be a state combination corresponding to a control resource set parameter (ControlResourceSetZero) indicated by the PBCH, or may be a state combination corresponding to a search space. The second indication information will be described below.

Specifically, when the second indication information is the state combination corresponding to the ControlResourceSetZero indicated by the PBCH, 4-bit information can be occupied in the ControlResourceSetZero, and 16 state combinations (0, 1, 2-15) are shared. At this time, among the 16 state combinations, the first state combination indicates one of the SCS's in the group, for example, indicates SCS1 or SCS2 in group 1, and the second state combination indicates the other SCS in group 1. The indication process can be illustrated by the following table:

in the above table, the CORESET configuration of two SCS of PDCCH is shown when SSB is 240KHz, the target SCS of PDCCH is 480KHz when index value of control set parameter is 0-7, and the target SCS of PDCCH is 240KHz when index value is 8-15.

It should be noted that, of course, the index indication is used in the above table to identify and distinguish SCS, but it is also possible to make the above table into 2 tables, where the length of each table does not exceed 8 combinations (3-bit information length), so that 4 bits are total, and 1bit indicates which set of SCS is used in PDCCH, and the remaining 3 bits indicate the configuration combination of CORESET. In addition, the search in the above table for configurations 0-7 and 8-15 is the same, but this is merely an example, and the contents may be configured differently, and this is not limited herein.

Thus, the target SCS is indicated through the control resource set parameters, and based on the current NR system, when the SCS of the SSB is larger than 60KHz, some combinations are not used in 16 CORERESET combinations, so that SCS differentiation can be performed by using the existing reserved and unused combinations, the existing design is well compatible, and the protocol formulation complexity is reduced.

Further, specifically, when the second indication information is a state combination corresponding to the search space (searchSpaceZero) indicated by the PBCH, 4-bit information may be occupied in the searchSpaceZero indication, and 16 states (0, 1, 2-15) may be shared. At this time, it is possible that in 16 state combinations, the first state combination indicates 1 SCS therein in group 1, and the second state combination indicates the other 1 SCS in group 1. The indication process can be illustrated by the following table:

in the above table, the search space configuration (or called detection opportunity configuration) of two SCS of PDCCH is shown when the SSB is 240 KHz. For example, when the search space index value is 0, the SCS of the PDCCH is 240KHz, and when the index value is 2, the SCS of the PDCCH is 480 KHz.

It should be noted that, in the above table, the index value is used to indicate the identification and differentiation of SCS. Of course, the above table can be made into 2 tables, and the length of each table does not exceed 8 combinations (3-bit information length), so that out of 4 bits in total, 1bit is used to indicate which set of SCS is used in PDCCH, and the remaining 3 bits indicate the search space configuration combination. In addition, the configuration contents of 0 and 2 in the above table are the same, and this is only an example, and the contents may be configured differently, and this is not limited here.

Namely, the target SCS is indicated through the state combination corresponding to the search space, and based on the current NR system, when the SCS of the SSB is larger than 120KHz, some combinations are not used in 16 search space combinations, so that SCS differentiation can be performed by using the existing combinations which are reserved and not used, the existing design is well compatible, and the protocol formulation complexity is reduced.

Of course, it should be noted that when the number of candidate SCS is greater than or equal to 3, additional indication information is required, and this embodiment uses the reservation (unused state) in the existing NR technology to indicate, so that no new information field is occupied, and thus, the existing technical specification can be well compatible. Of course, other reserved bit information in the PBCH may also be used for indication, and will not be described here.

Thus, the indication process of the target SCS when the number of at least one candidate SCS is 1, 2, 3 and 4 is realized through the above-mentioned several ways.

In this embodiment, the terminal acquires the at least one candidate SCS used by the PDCCH, and receives the PBCH sent by the base station, where the PBCH carries indication information indicating a target SCS used by the PDCCH, so that the terminal can acquire the target SCS from the at least one candidate SCS based on the indication information, thereby indicating Type0-PDCCH more flexibly, and supporting more candidate types of SCS.

In addition, as shown in fig. 2, a flowchart of steps of a subcarrier spacing indication method applied to a base station in the embodiment of the present invention is shown, where the method includes the following steps:

step 201: and acquiring at least one candidate SCS adopted by the PDCCH, and sending the PBCH to the terminal.

Specifically, the PBCH carries indication information indicating a target SCS used by the PDCCH, where the target SCS is one of the at least one candidate SCS.

Thus, the PBCH is sent to the terminal, the PBCH carries the indication information indicating the target SCS adopted by the PDCCH, and the target SCS is one of the obtained candidate SCSs, so that the terminal can obtain the target SCS from the candidate SCS based on the indication information in the PBCH, thereby realizing the indication of the target SCS in NR and solving the problem that the SCS of type0-PDCCH in the frequency spectrum of 52.6GHz and above cannot be effectively indicated in the prior art.

In addition, in this embodiment, when acquiring at least one candidate SCS employed by the PDCCH, the base station may acquire at least one candidate SCS employed by the PDCCH predefined by the protocol; or, sending an indication message to the terminal, where the indication message carries the subcarrier spacing common configuration information element parameter, and the subcarrier spacing common configuration information element parameter carries the at least one candidate SCS.

It should be noted that, the manner of obtaining the candidate SCS may refer to the terminal-side corresponding description, and is not described herein again.

It should be noted that, for specific contents of the above various combinations of the first SCS and the second SCS, reference may be made to corresponding contents on the terminal side, and details are not described here again.

Secondly, when the first SCS, the second SCS, and the third SCS in a combination:

Specifically, N is a positive integer greater than or equal to 3; further, for example, the optional SCS comprises at least three of: 60KHz, 120KHz,240KHz, 480KHz, 960KHz and 1920 KHz. Of course, it should be noted that the above-mentioned optional SCS is only an example, and the specific value of the optional SCS is not specifically limited herein.

It should be noted that specific contents of the above various combinations of the first SCS, the second SCS, and the third SCS may refer to corresponding contents on the terminal side, and are not described herein again.

in the first combination, when the N selectable SCSs corresponding to the PDCCH are sorted from small to large according to the numerical values, the numerical value is the smallest, the first SCS is sorted on the first quartering point of the N or the sorting position adjacent to the first quartering point of the N, the third SCS is sorted on the second quartering point of the N or the sorting position adjacent to the second quartering point of the N, and the fourth SCS is sorted on the third quartering point of the N or the sorting position adjacent to the third quartering point of the N.

In the second combination, when the N selectable SCSs corresponding to the PDCCH are sorted from small to large according to the numerical values, the first SCS with the largest numerical value, the second SCS which is arranged at the first quartering point of the N or at the sorting position adjacent to the first quartering point of the N, the third SCS which is arranged at the second quartering point of the N or at the sorting position adjacent to the second quartering point of the N, and the fourth SCS which is arranged at the third quartering point of the N or at the sorting position adjacent to the third quartering point of the N are sorted.

In the third combination, when the N selectable SCSs corresponding to the PDCCH are sorted from small to large according to the numerical values, the first SCS with the smallest numerical value, the second SCS with the largest numerical value, the third SCS which is located at the first trisection point of the N or at the sorting position adjacent to the first trisection point of the N in a sorting mode, and the fourth SCS which is located at the second trisection point of the N or at the sorting position adjacent to the second trisection point of the N in a sorting mode.

Specifically, N is a positive integer greater than or equal to 4; for example, the optional SCS comprises at least four of: 60KHz, 120KHz,240KHz, 480KHz, 960KHz and 1920 KHz. Of course, it should be noted that the above-mentioned optional SCS is only an example, and the specific value of the optional SCS is not specifically limited herein.

It should be noted that, for specific contents of the combination of the first SCS, the second SCS, the third SCS, and the fourth SCS, reference may be made to corresponding contents on the terminal side, and details are not repeated herein.

In addition, it should be noted that, when the number of the at least one candidate SCS is 3 or 4, the at least one candidate SCS is located in two groups and each group includes at most two candidate SCS.

Fourthly, at least one candidate SCS comprises any one of the following items:

first, at least one candidate SCS is associated with an SCS of a synchronization signal block SSB;

a second term, wherein at least one candidate SCS is associated with an operating frequency band;

third, at least one candidate SCS is associated with the SCS of the SSB and the operating frequency band.

It should be noted that, for the relevant content of each item, reference may be made to corresponding content on the terminal side, and details are not described herein again.

indicating whether the base station supports the preset terminal capability;

indicating whether the base station supports the preset service;

It should be noted that, for specific descriptions of the above items, reference may be made to corresponding contents on the terminal side, and details are not described herein again.

Secondly, when the number of the at least one candidate SCS is 2, the indication information is 1-bit information.

It should be noted that, for a specific description of the above case, reference may be made to corresponding contents on the terminal side, and details are not described herein again.

Thirdly, when the number of the at least one candidate SCS is 3 or 4, the indication information is 2-bit information.

Wherein the target SCS adopted by the PDCCH is indicated as a first SCS when the numerical combination of the 2-bit information is a first combination, the target SCS adopted by the PDCCH is indicated as a second SCS when the numerical combination of the 2-bit information is a second combination, the target SCS adopted by the PDCCH is indicated as a third SCS when the numerical combination of the 2-bit information is a third combination, and the target SCS adopted by the PDCCH is indicated as a fourth SCS when the numerical combination of the 2-bit information is a fourth combination.

Wherein the first indication information is 1-bit information for indicating the grouping where the target SCS is located;

the second indication information is 1-bit PBCH reservation information for indicating the location of the target SCS in the packet where the target SCS is located; alternatively, the first and second electrodes may be,

the second indication information is a state combination corresponding to the parameter of the control resource set indicated by the PBCH or a state combination corresponding to the search space, wherein a first state combination in the state combinations indicates that the target SCS is a first SCS in the group where the target SCS is located, and a second state combination in the state combinations indicates that the target SCS is a second SCS in the group where the target SCS is located.

In this way, the base station in this embodiment obtains the at least one candidate SCS used by the PDCCH and sends the PBCH to the terminal, where the PBCH carries indication information indicating a target SCS used by the PDCCH, and the target SCS is one of the at least one candidate SCS, so as to implement indication of the target SCS in the NR system.

In addition, as shown in fig. 3, a block diagram of a subcarrier spacing indication apparatus applied to a terminal in the embodiment of the present invention is shown, where the apparatus includes:

a first obtaining module 301, configured to obtain at least one candidate subcarrier spacing SCS used by a physical downlink control channel PDCCH, and receive a physical broadcast channel PBCH sent by a base station, where the PBCH carries indication information indicating a target SCS used by the PDCCH, and the target SCS is one of the at least one candidate SCS;

a second obtaining module 302, configured to obtain the target SCS from the at least one candidate SCS based on the indication information.

It should be noted that, the apparatus in this embodiment can implement all the method steps at the terminal side, and can achieve the same technical effect, and repeated description is not repeated here.

In addition, as shown in fig. 4, a block diagram of a subcarrier spacing indication apparatus applied to a base station in the embodiment of the present invention is shown, where the apparatus includes:

an obtaining module 401, configured to obtain at least one candidate subcarrier spacing SCS used by a physical downlink control channel PDCCH, and send a physical broadcast channel PBCH to a terminal, where the PBCH carries indication information indicating a target SCS used by the PDCCH, and the target SCS is one of the at least one candidate SCS.

It should be noted that the apparatus in this embodiment can implement all the method steps at the base station side, and can achieve the same technical effect, and repeated description is not repeated here.

In addition, fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention, and as shown in fig. 5, the terminal 500 may include: at least one processor 501, memory 502, at least one network interface 504, and other user interfaces 503. The various components in terminal 500 are coupled together by a bus system 505. It is understood that the bus system 505 is used to enable connection communications between these components. The bus system 505 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 505 in FIG. 5.

The user interface 503 may include a display, a keyboard, or a pointing device, such as a mouse, a trackball (trackball), a touch pad, or a touch screen, among others.

It is to be understood that the memory 502 in embodiments of the present invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (ddr Data Rate SDRAM, ddr SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 502 of the systems and methods described in connection with the various embodiments of the invention is intended to comprise, without being limited to, these and any other suitable types of memory.

In some embodiments, memory 502 stores elements, executable modules or data structures, or a subset thereof, or an expanded set thereof, such as: an operating system 5021 and application programs 5022.

The operating system 5021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application 5022 includes various applications, such as a Media Player (Media Player), a Browser (Browser), and the like, for implementing various application services. The program for implementing the method according to the embodiment of the present invention may be included in the application program 5022.

In the embodiment of the present invention, by calling a computer program or an instruction stored in the memory 502, specifically, a computer program or an instruction stored in the application 5022, the processor 501 is configured to: acquiring at least one candidate subcarrier spacing SCS adopted by a physical downlink control channel PDCCH, and receiving a physical broadcast channel PBCH sent by a base station, wherein the PBCH carries indication information for indicating a target SCS adopted by the PDCCH, and the target SCS is one of the at least one candidate SCS; and acquiring the target SCS from the at least one candidate SCS based on the indication information.

The method disclosed by the above-mentioned embodiments of the present invention may be applied to the processor 501, or implemented by the processor 501. The processor 501 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 501. The Processor 501 may be a general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 502, and the processor 501 reads the information in the memory 502 and completes the steps of the method in combination with the hardware.

It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the Processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.

For a software implementation, the techniques described may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described in the embodiments of the invention. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.

Optionally, as another embodiment, when the number of the at least one candidate SCS is 1, the indication information is 1-bit information, and is further configured to indicate at least one of the following: indicating whether the base station supports the preset terminal capability; indicating whether the base station supports the preset service; and indicating a channel interception mode configured by the base station when the spectrum is not authorized, wherein the channel interception mode comprises a static interception mode and a non-static interception mode.

Optionally, as another embodiment, when the number of the at least one candidate SCS is 2, the indication information is 1-bit information; wherein the target SCS adopted by the PDCCH is indicated as a first SCS when the value of the 1-bit information is a first preset value, and the target SCS adopted by the PDCCH is indicated as a second SCS when the value of the 1-bit information is a second preset value.

Optionally, as another embodiment, when the number of the at least one candidate SCS is 3 or 4, the indication information is 2-bit information; wherein the target SCS adopted by the PDCCH is indicated as a first SCS when the numerical combination of the 2-bit information is a first combination, the target SCS adopted by the PDCCH is indicated as a second SCS when the numerical combination of the 2-bit information is a second combination, the target SCS adopted by the PDCCH is indicated as a third SCS when the numerical combination of the 2-bit information is a third combination, and the target SCS adopted by the PDCCH is indicated as a fourth SCS when the numerical combination of the 2-bit information is a fourth combination.

Optionally, as another embodiment, when the number of the at least one candidate SCS is 3 or 4, and the at least one candidate SCS is located in two groups and each group includes at most two candidate SCS, the indication information includes a first indication information and a second indication information; wherein the first indication information is 1-bit information for indicating the grouping where the target SCS is located; the second indication information is 1-bit PBCH reservation information for indicating the location of the target SCS in the packet where the target SCS is located; or, the second indication information is a state combination corresponding to the control resource set parameter indicated by the PBCH or a state combination corresponding to the search space, where a first state combination in the state combinations indicates that the target SCS is the first SCS in the group where the target SCS is located, and a second state combination in the state combinations indicates that the target SCS is the second SCS in the group where the target SCS is located.

Optionally, as another embodiment, the processor 501 is further configured to obtain at least one candidate SCS employed by a PDCCH predefined by a protocol; or receiving an indication message sent by the base station, where the indication message carries a subcarrier spacing common configuration information element parameter, and the subcarrier spacing common configuration information element parameter carries the at least one candidate SCS.

Optionally, as another embodiment, when the number of the at least one candidate SCS is 2, the at least one candidate SCS includes a first SCS and a second SCS in any combination of the following:

a first SCS with the minimum value and a second SCS with the maximum value in the N optional SCSs corresponding to the PDCCH; when N optional SCSs corresponding to the PDCCH are sorted according to the numerical value, sorting a first SCS positioned on a first trisection point of the N or a sorting position adjacent to the first trisection point of the N, and sorting a second SCS positioned on a second trisection point of the N or a sorting position adjacent to the second trisection point of the N; when N selectable SCSs corresponding to the PDCCH are sorted from small to large according to the numerical value, the first SCS corresponding to the sorting position which is positioned at the first trisection point of N or adjacent to the first trisection point of N is used as a reference, and the first SCS corresponding to the sorting position which is deviated to the left is sorted, and the second SCS is sorted at the second trisection point of N or adjacent to the second trisection point of N; when N selectable SCSs corresponding to the PDCCH are sorted from small to large according to the numerical value, the first SCS which is positioned on a first trisection point of the N or a sorting position adjacent to the first trisection point of the N is sorted, and the second SCS which is corresponding to the second SCS when the second trisection point of the N or the sorting position adjacent to the second trisection point of the N is shifted to the right by one sorting position is used as a reference; wherein N is a positive integer greater than or equal to 2.

The terminal provided by the embodiment of the present invention can implement each process implemented by the terminal in the foregoing embodiments, and is not described herein again to avoid repetition.

In addition, fig. 6 is a schematic structural diagram of a terminal according to another embodiment of the present invention, where the terminal in fig. 6 may be a mobile phone, a tablet computer, a Personal Digital Assistant (PDA), an electronic reader, a handheld game machine, a Point of Sales (POS), a vehicle-mounted electronic device (vehicle-mounted computer), or the like. As shown in fig. 6, the terminal includes a Radio Frequency (RF) circuit 610, a memory 620, an input unit 630, a display unit 640, a processor 660, an audio circuit 670, a wifi (wireless fidelity) module 680, and a power supply 690. Those skilled in the art will appreciate that the handset configuration shown in fig. 2 is not intended to be limiting and may include more or fewer components than those shown, or may combine certain components, or split certain components, or arranged in different components.

The input unit 630 may be used, among other things, to receive numeric or character information input by a user and to generate signal inputs related to user settings and function control of the mobile terminal. Specifically, in the embodiment of the present invention, the input unit 630 may include a touch panel 6301. The touch panel 6301, also referred to as a touch screen, can collect touch operations of a user (e.g., operations of the user on the touch panel 6301 by using a finger, a stylus pen, or any other suitable object or accessory) thereon or nearby, and drive the corresponding connection device according to a preset program. Alternatively, the touch panel 6301 may include two parts, i.e., a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 660, and can receive and execute commands sent by the processor 660. In addition, the touch panel 6301 can be implemented by using various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The input unit 630 may include other input devices 6302 in addition to the touch panel 6301, and the other input devices 6302 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. In particular, other input devices 6302 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, a light mouse (a light mouse is a touch-sensitive surface that does not display visual output, or is an extension of a touch-sensitive surface formed by a touch screen), and the like.

Among them, the display unit 640 may be used to display information input by a user or information provided to the user and various menu interfaces of the mobile terminal. The display unit 640 may include a display panel 6401. The Display panel 6401 may be configured by a Liquid Crystal Display (LCD), an organic light-Emitting Diode (OLED), or the like.

It should be noted that the touch panel 6301 may cover the display panel 6401 to form a touch display screen, and when the touch display screen detects a touch operation thereon or nearby, the touch display screen is transmitted to the processor 660 to determine the type of the touch event, and then the processor 660 provides a corresponding visual output on the touch display screen according to the type of the touch event.

The touch display screen comprises an application program interface display area and a common control display area. The arrangement modes of the application program interface display area and the common control display area are not limited, and can be an arrangement mode which can distinguish two display areas, such as vertical arrangement, left-right arrangement and the like. The application interface display area may be used to display an interface of an application. Each interface may contain at least one interface element such as an icon and/or widget desktop control for an application. The application interface display area may also be an empty interface that does not contain any content. The common control display area is used for displaying controls with high utilization rate, such as application icons like setting buttons, interface numbers, scroll bars, phone book icons and the like.

The RF circuit 610 may be used for receiving and transmitting signals during information transmission and reception or during a call, and in particular, receives downlink information from a network side and then processes the received downlink information to the processor 660; in addition, the design uplink data is sent to the network side. In general, RF circuit 610 includes, but is not limited to, an antenna, at least one Amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, the RF circuitry 610 may also communicate with networks and other devices via wireless communications. The wireless communication may use any communication standard or protocol, including but not limited to Global System for mobile communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Messaging Service (SMS), and the like.

The memory 620 is used to store software programs and modules, and the processor 660 executes various functional applications and data processing of the mobile terminal by operating the software programs and modules stored in the memory 620. The memory 620 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the mobile terminal, and the like. Further, the memory 620 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 660 is a control center of the terminal, connects various parts of the entire mobile phone by using various interfaces and lines, and executes various functions and processes data of the mobile terminal by running or executing software programs and/or modules stored in the first memory 6201 and calling data stored in the second memory 6202, thereby integrally monitoring the mobile terminal. Optionally, processor 660 may include one or more processing units.

In this embodiment of the present invention, by invoking a software program and/or a module stored in the first memory 6201 and/or data stored in the second memory 6202, the processor 660 is configured to obtain at least one candidate subcarrier spacing SCS used by a physical downlink control channel PDCCH, and receive a physical broadcast channel PBCH sent by a base station, where the PBCH carries indication information indicating a target SCS used by the PDCCH, where the target SCS is one of the at least one candidate SCS; and acquiring the target SCS from the at least one candidate SCS based on the indication information.

Fig. 7 is a schematic structural diagram of a base station according to an embodiment of the present invention, and as shown in fig. 7, the base station 700 may include at least one processor 701, a memory 702, at least one other user interface 703, and a transceiver 704. The various components in the base station 700 are coupled together by a bus system 705. It is understood that the bus system 705 is used to enable communications among the components. The bus system 705 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled in fig. 7 as the bus system 705, which may include any number of interconnected buses and bridges, with one or more processors, represented by the processor 701, and various circuits, represented by the memory 702, being linked together. The bus system may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, embodiments of the present invention will not be described any further. The bus interface provides an interface. The transceiver 704 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 703 may also be an interface capable of interfacing externally to a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

It is to be understood that the memory 702 in embodiments of the present invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (ddr Data Rate SDRAM, ddr SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 702 of the systems and methods described in connection with the various embodiments of the invention is intended to comprise, without being limited to, these and any other suitable types of memory.

The processor 701 is responsible for managing the bus system and general processing, and the memory 702 may store computer programs or instructions used by the processor 1001 in performing operations, and in particular, the processor 701 may be configured to: the method comprises the steps of obtaining at least one candidate subcarrier spacing SCS adopted by a physical downlink control channel PDCCH, and sending a physical broadcast channel PBCH to a terminal, wherein the PBCH carries indication information for indicating a target SCS adopted by the PDCCH, and the target SCS is one of the at least one candidate SCS.

The method disclosed in the above embodiments of the present invention may be applied to the processor 701, or implemented by the processor 701. The processor 701 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 701. The Processor 701 may be a general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 702, and the processor 701 reads the information in the memory 702 and performs the steps of the above method in combination with the hardware thereof.

The base station provided by the embodiment of the present invention can implement each process implemented by the base station in the foregoing embodiments, and is not described herein again to avoid repetition.

The above description mainly introduces the solution provided by the embodiments of the present invention from the perspective of the base station. It is understood that the base station provided in the embodiments of the present invention includes a hardware structure and/or a software module for performing the above functions. Those of skill in the art will readily appreciate that the present invention can be implemented in hardware or a combination of hardware and computer software for performing the exemplary elements and algorithm steps described in connection with the embodiments disclosed herein.

Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

In the embodiment of the present invention, the electronic device and the like may be divided into functional modules according to the above method examples, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

It should be noted that, the division of the modules in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the technical solution can be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a processor to execute all or part of the steps of the method according to the embodiments of the present invention. The computer storage medium is a non-transitory (English) medium, comprising: flash memory, removable hard drive, read only memory, random access memory, magnetic or optical disk, and the like.

On the other hand, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method steps provided in the foregoing embodiments, and can achieve the same technical effects, and details are not repeated herein.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A method for indicating a subcarrier spacing, comprising:

2. The method of claim 1, wherein when the number of the at least one candidate SCS is 1, the indication information is 1-bit information, and is further configured to indicate at least one of the following:

indicating whether the base station supports the preset terminal capability;

indicating whether the base station supports the preset service;

3. The method according to claim 1, wherein when the number of the at least one candidate SCS is 2, the indication information is 1-bit information;

4. The method according to claim 1, wherein when the number of the at least one candidate SCS is 3 or 4, the indication information is 2-bit information;

5. The method according to claim 1, wherein when the number of the at least one candidate SCS is 3 or 4, and the at least one candidate SCS is located in two groups and each group contains at most two candidate SCS, the indication information comprises a first indication information and a second indication information;

6. The method for indicating subcarrier spacing according to claim 1, wherein the obtaining at least one candidate subcarrier spacing SCS employed by a physical downlink control channel PDCCH comprises:

acquiring at least one candidate SCS adopted by a PDCCH predefined by a protocol; alternatively, the first and second electrodes may be,

and receiving an indication message sent by the base station, wherein the indication message carries a subcarrier spacing common configuration information element parameter, and the subcarrier spacing common configuration information element parameter carries the at least one candidate SCS.

7. The method of claim 1 or 6, wherein when the number of the at least one candidate SCS is 2, the at least one candidate SCS comprises a first SCS and a second SCS in any combination of the following steps:

a first SCS with the minimum value and a second SCS with the maximum value in the N optional SCSs corresponding to the PDCCH;

when N optional SCSs corresponding to the PDCCH are sorted according to the numerical value, sorting a first SCS positioned on a first trisection point of the N or a sorting position adjacent to the first trisection point of the N, and sorting a second SCS positioned on a second trisection point of the N or a sorting position adjacent to the second trisection point of the N;

when N selectable SCSs corresponding to the PDCCH are sorted from small to large according to the numerical value, the first SCS corresponding to the sorting position which is positioned at the first trisection point of N or adjacent to the first trisection point of N is used as a reference, and the first SCS corresponding to the sorting position which is deviated to the left is sorted, and the second SCS is sorted at the second trisection point of N or adjacent to the second trisection point of N;

when N selectable SCSs corresponding to the PDCCH are sorted from small to large according to the numerical value, the first SCS which is positioned on a first trisection point of the N or a sorting position adjacent to the first trisection point of the N is sorted, and the second SCS which is corresponding to the second SCS when the second trisection point of the N or the sorting position adjacent to the second trisection point of the N is shifted to the right by one sorting position is used as a reference;

wherein N is a positive integer greater than or equal to 2.

8. The method of claim 1 or 6, wherein when the number of the at least one candidate SCS is 3, the at least one candidate SCS comprises a first SCS, a second SCS and a third SCS in any combination of the following steps:

when N selectable SCSs corresponding to the PDCCH are sorted from small to large according to the numerical values, a first SCS with the smallest numerical value, a second SCS with the smallest numerical value, which is arranged at a first trisection point of the N or a sorting position adjacent to the first trisection point of the N, and a third SCS with the smallest numerical value, which is arranged at a second trisection point of the N or a sorting position adjacent to the second trisection point of the N;

when N selectable SCSs corresponding to the PDCCH are sorted from small to large according to the numerical values, a first SCS with the largest numerical value, a second SCS with the largest numerical value, and a third SCS with the largest numerical value, wherein the sorting is positioned at a first trisection point of the N or a sorting position adjacent to the first trisection point of the N, and the sorting is positioned at a second trisection point of the N or a sorting position adjacent to the second trisection point of the N;

when N selectable SCSs corresponding to the PDCCH are sorted from small to large according to the numerical values, a first SCS with the minimum numerical value, a second SCS with the maximum numerical value and a third SCS which is located at the halving point of the N or the sorting position adjacent to the halving point of the N are sorted;

wherein N is a positive integer greater than or equal to 3.

9. The method as claimed in claim 1 or 6, wherein when the number of the at least one candidate SCS is 4, the at least one candidate SCS comprises a first SCS, a second SCS, a third SCS and a fourth SCS in any combination of the following steps:

when N selectable SCSs corresponding to the PDCCH are sorted from small to large according to the numerical values, a first SCS with the smallest numerical value, a second SCS which is located at a first quartering point of the N or at a sorting position adjacent to the first quartering point of the N, a third SCS which is located at a second quartering point of the N or at a sorting position adjacent to the second quartering point of the N, and a fourth SCS which is located at a third quartering point of the N or at a sorting position adjacent to the third quartering point of the N are sorted;

when N selectable SCSs corresponding to the PDCCH are sorted from small to large according to the numerical values, a first SCS with the largest numerical value, a second SCS which is arranged at a first quartering point of the N or at a sorting position adjacent to the first quartering point of the N, a third SCS which is arranged at a second quartering point of the N or at a sorting position adjacent to the second quartering point of the N, and a fourth SCS which is arranged at a third quartering point of the N or at a sorting position adjacent to the third quartering point of the N are sorted;

when the N selectable SCSs corresponding to the PDCCH are sorted from small to large according to the numerical values, a first SCS with the smallest numerical value, a second SCS with the largest numerical value, a third SCS arranged at a first trisection point of the N or a sorting position adjacent to the first trisection point of the N, and a fourth SCS arranged at a second trisection point of the N or a sorting position adjacent to the second trisection point of the N are sorted;

wherein N is a positive integer greater than or equal to 4.

10. The method according to claim 1 or 6, wherein when the number of the at least one candidate SCS is 3 or 4, the at least one candidate SCS is located in two groups and each group comprises at most two candidate SCSs.

11. The method of claim 1 or 6, wherein the at least one candidate SCS comprises any one of the following:

the at least one candidate SCS is associated with a SCS of the synchronization signal block SSB;

the at least one candidate SCS is associated with an operating frequency band;

the at least one candidate SCS is associated with an SCS of the SSB and the operating frequency band.

12. A method for indicating a subcarrier spacing, comprising:

13. The method of claim 12, wherein when the number of the at least one candidate SCS is 1, the indication information is 1-bit information, and is further configured to indicate at least one of the following:

indicating whether the base station supports the preset terminal capability;

indicating whether the base station supports the preset service;

14. The method according to claim 12, wherein when the number of the at least one candidate SCS is 2, the indication information is 1-bit information;

15. The method according to claim 12, wherein when the number of the at least one candidate SCS is 3 or 4, the indication information is 2-bit information;

16. The method according to claim 12, wherein when the number of the at least one candidate SCS is 3 or 4, and the at least one candidate SCS is located in two groups and each group contains at most two candidate SCS, the indication information comprises a first indication information and a second indication information;

17. The method according to claim 12, wherein the obtaining at least one candidate subcarrier spacing SCS employed by the physical downlink control channel PDCCH comprises:

and sending an indication message to a terminal, wherein the indication message carries a subcarrier spacing common configuration information element parameter, and the subcarrier spacing common configuration information element parameter carries the at least one candidate SCS.

18. The method according to claim 12 or 17, wherein when the number of the at least one candidate SCS is 2, the at least one candidate SCS comprises a first SCS and a second SCS in any combination of:

wherein N is a positive integer greater than or equal to 2.

19. The method according to claim 12 or 17, wherein when the number of the at least one candidate SCS is 3, the at least one candidate SCS comprises a first SCS, a second SCS, and a third SCS in any combination of the following:

wherein N is a positive integer greater than or equal to 3.

20. The method according to claim 12 or 17, wherein when the number of the at least one candidate SCS is 4, the at least one candidate SCS comprises a first SCS, a second SCS, a third SCS, and a fourth SCS in any combination of the following:

wherein N is a positive integer greater than or equal to 4.

21. The method according to claim 12 or 17, wherein when the number of the at least one candidate SCS is 3 or 4, the at least one candidate SCS is located in two groups and each group comprises at most two candidate SCS.

22. The method of claim 12 or 17, wherein the at least one candidate SCS comprises any one of the following:

the at least one candidate SCS is associated with an operating frequency band;

23. A subcarrier spacing indication apparatus, comprising:

24. A subcarrier spacing indication apparatus, comprising:

25. A terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the computer program performs the steps of:

26. The terminal of claim 25, wherein when the number of the at least one candidate SCS is 1, the indication information is 1-bit information, and is further configured to indicate at least one of the following:

indicating whether the base station supports the preset terminal capability;

indicating whether the base station supports the preset service;

27. The terminal of claim 25, wherein when the number of the at least one candidate SCS is 2, the indication information is 1-bit information;

28. The terminal of claim 25, wherein when the number of the at least one candidate SCS is 3 or 4, the indication information is 2-bit information;

29. The terminal of claim 25, wherein the indication information comprises a first indication information and a second indication information when the number of the at least one candidate SCS is 3 or 4 and the at least one candidate SCS is located in two groups and each group contains at most two candidate SCS;

30. The terminal according to claim 25, wherein the obtaining at least one candidate subcarrier spacing SCS employed by the physical downlink control channel PDCCH comprises:

31. The terminal according to claim 25 or 30, wherein when the number of the at least one candidate SCS is 2, the at least one candidate SCS comprises a first SCS and a second SCS in any combination of:

wherein N is a positive integer greater than or equal to 2.

32. The terminal according to claim 25 or 30, wherein when the number of the at least one candidate SCS is 3, the at least one candidate SCS comprises a first SCS, a second SCS, and a third SCS in any combination of:

wherein N is a positive integer greater than or equal to 3.

33. A base station comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the computer program performs the steps of:

34. The base station of claim 33, wherein when the number of the at least one candidate SCS is 1, the indication information is 1-bit information, and is further configured to indicate at least one of the following:

indicating whether the base station supports the preset terminal capability;

indicating whether the base station supports the preset service;

35. The base station of claim 33, wherein when the number of the at least one candidate SCS is 2, the indication information is 1-bit information;

36. The base station of claim 33, wherein when the number of the at least one candidate SCS is 3 or 4, the indication information is 2-bit information;

37. A non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor implements the steps of the subcarrier spacing indication method of any of claims 1 to 12 or the steps of the subcarrier spacing indication method of any of claims 13 to 22.