CN113395773B

CN113395773B - Subcarrier interval indication method, terminal and base station

Info

Publication number: CN113395773B
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: 2024-04-09
Anticipated expiration: 2040-03-13
Also published as: WO2021179812A1; CN113395773A

Abstract

The embodiment of the invention provides a subcarrier spacing indication method, a terminal and a base station, wherein the method comprises the following steps: acquiring at least one candidate sub-carrier 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, the demands of people for mobile communication are higher and higher, especially on the communication bandwidth and communication rate, the rate of the order of gigabit is expected to be achieved, and in order to meet the demands of people for 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 of a Frequency Range (FR) FR1 and FR 2. Wherein FR1 ranges from 410MHz to 7.125GHz; FR2 ranges from 24.25GHz to 52.6GHz.

The current 3GPP standard starts to research mobile wireless communication in the frequency band of 52.6 GHz-71 GHz, and the higher communication frequency can bring about a larger bandwidth advantage, but brings about a larger challenge to the wireless communication design, mainly that the higher frequency has a larger doppler frequency offset and also has a larger phase noise generation. In order to solve the effect of doppler and phase noise from the high frequency band, a higher subcarrier spacing (SCS) is used, for example scs=240 KHz, scs=480 KHz, scs=960 KHz, etc.

In the NR system, when the physical downlink control channel (Physical Downlink Control Channel, PDCCH) with the type (type) of 0 adopts a new SCS and adds the original SCS value (for example, 120KHz,60 KHz), the SCS of the type0-PDCCH has multiple choices. The terminal needs to know the SCS value adopted by the channel before detecting or receiving the type0-PDCCH, and how to effectively indicate the SCS value needs to be studied and clarified.

Disclosure of Invention

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

acquiring at least one candidate sub-carrier 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.

and acquiring at least one candidate sub-carrier interval (SCS) adopted by the Physical Downlink Control Channel (PDCCH), and sending a Physical Broadcast Channel (PBCH) to the 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 spacing indicating device, which comprises:

a first obtaining module, configured to obtain at least one candidate subcarrier spacing SCS adopted 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 for indicating a target SCS adopted by the PDCCH, and the target SCS is one of the at least one candidate SCS;

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

an obtaining module, configured to obtain at least one candidate subcarrier spacing SCS adopted by a physical downlink control channel PDCCH, and send a physical broadcast channel PBCH to a terminal, where 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 terminal, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the steps of the terminal-side method when executing the program.

The embodiment of the invention provides a base station, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the steps of the method on the base station side when executing the program.

Embodiments of the present invention provide 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.

According to the subcarrier spacing indication method, the terminal and the base station provided by the embodiment of the invention, the terminal obtains at least one candidate SCS adopted by the PDCCH and receives 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 terminal can obtain the target SCS from the at least one candidate SCS based on the indication information, the indication of the SCS adopted by the type0-PDCCH in an NR system is realized, and the problem that the SCS of the type0-PDCCH in a 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 of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

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

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

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

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

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

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

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

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In order to clearly describe the technical solutions of the embodiments of the present invention, in each embodiment of the present invention, if "first", "second", and the like words are used to distinguish the same item or similar items having substantially the same function and effect, those skilled in the art will understand that the "first", "second", and the like words do not limit the number and execution order.

Specifically, the synchronization signal block (synchronous signal block, SSB) includes a primary synchronization signal (primary synchronous signal, PSS), a secondary synchronization signal (Second Synchronous Signal, SSS) and a physical broadcast channel (Physical Broadcast Channel, PBCH), and the terminal performs synchronization search according to the PSS/SSS when searching a cell, and receives the PBCH after completing the synchronization search. The information of the PBCH indicating type0-PDCCH mainly comprises the following three aspects: first, a control resource set (control resource set, CORESET) of type0-PDCCH, such as SCS with both 60KHz and 120KHz options when in Frequency Range FR2 (Frequency Range 2) and SCS with both 15KHz and 30KHz options when in FR1, and indicated with 1 bit; secondly, the resource size information of CORESET of the type0-PDCCH comprises the number of occupied PRBs (three of 24 RBs, 48 RBs and 96 RBs) on a frequency domain, and the number of occupied OFDM symbols (three of 1,2 and 3) on a time domain, wherein 4 bits in total represent 16 conditions; third, search space (search space) information of type0-PDCCH, i.e., detection opportunities in time, 4 bits in total represent 16 cases.

In addition, in the cell search process, the terminal firstly searches PSS/SSS after starting up, demodulates PBCH information after finishing PSS/SSS search, reads configuration information of type0-PDCCH from a main information block (master information block, MIB) of the PBCH, and then detects and receives the type0-PDCCH according to the configuration information. In addition, when there are multiple SCSs of SSB, the terminal is required to traverse different candidate SCSs until PSS/SSS is searched.

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

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

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

Step 101: at least one candidate SCS adopted by the PDCCH is acquired, and a PBCH sent by the base station is received.

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

In addition, the PDCCH may be a type0-PDCCH.

Step 102: based on the indication information, a target SCS is obtained from at least one candidate SCS.

In this step, specifically, when the terminal receives the PBCH, the terminal may acquire the target SCS from the acquired at least one candidate SCS based on the indication information carried in the PBCH, thereby implementing the acquisition of the target SCS used by the PDCCH.

That is, in this embodiment, by acquiring at least one candidate SCS adopted by the PDCCH and receiving the PBCH sent by the base station, and carrying the indication information indicating the target SCS adopted 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 as to realize the indication of the SCS adopted by the type0-PDCCH in the NR system, and solve 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.

It should be noted that: spectrum operation above 52.6GHz may be defined in two ways in the standard, one being an extension to the current FR2, i.e. above 52.6GHz spectrum also falls within the FR2 range. Another new name is called FR3, or FR2+ or others.

In addition, in this embodiment, when the terminal acquires 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, wherein the indication message carries a subcarrier spacing public configuration information element parameter, and the subcarrier spacing public configuration information element parameter carries the at least one candidate SCS.

The at least one candidate SCS used for the PDCCH may be indicated by a predefined protocol, or may be indicated by a network-side configuration, which is not limited herein. For example, when predefined by a protocol, the candidate SCS of the PDCCH may be directly clarified when the interface protocol of the base station and the terminal is specified, such as indicating the association relationship between the candidate SCS of the type0-PDCCH and the operating frequency band in the radio frequency related interface protocol.

In addition, the indication information may be a higher layer message or a broadcast message, for example, the broadcast message contains the following fields: type0-PDCCH-SCS ENUMERATED { SCS240 or SCS960, SCS480 or SCS1920}, wherein ENUMERATED represents an enumeration meaning, meaning that one is selected from SCS240KHz, SCS960KHz, SCS480KHz and SCS1920 KHz.

In addition, when the Frequency 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 candidate SCS of newly added 52.6GHz, when at least one candidate SCS is carried in the sub-carrier spacing common configuration information element parameter (sub-carrier spacing common), the following can be expressed:

subCarrierSpacingCommon ENUMERATED { scs15 or 60or SCS1,scs30 or 120or SCS2}; where the subclrierspacengcommon represents the SCS candidate defining type0-PDCCH or the SCS corresponding to CORESET referenced by type 0-PDCCH. At this time, when the terminal searches on the FR1 band, its candidate SCS is 15KHz or 30KHz; when the terminal searches on the FR2 frequency band, candidate SCS is 60KHz or 120KHz; when the terminal searches at 52.6GHz and above, its candidate SCS is SCS1 or SCS2, with SCS1 and SCS2 each representing a candidate SCS.

Furthermore, when the spectrum above 52.6GHz is considered as an extension of the current FR2, i.e. belonging to the frequency range of FR2, the newly added candidate SCS can be expressed as follows: subCarrierSpacingCommon ENUMERATED { scs15 or {60or SCS1}, scs30 or {120or SCS2}; where the subclrierspacengcommon represents the SCS candidate defining type0-PDCCH or the SCS corresponding to CORESET referenced by type 0-PDCCH. At this time, when the terminal searches on the FR1 band, its candidate SCS is 15KHz or 30KHz; when the terminal searches on the FR2 band, its candidate SCS is 60KHz or 120KHz or SCS1 or SCS2.

It should be noted that in the description that follows in this technical scheme, when 52.6GHz is defined as a new frequency range, such as FR3, then 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 of 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 SCS values are 1, scs=240 KHz. The number of candidate SCS indicated to the base station in PBCH is added with the number of candidates of the original FR2 (60 KHz,120 KHz), namely three {60KHz,120KHz and 240KHz }, in total.

Further, the number of 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 described by differentiating the number of the at least one candidate SCS in cases:

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

First combination, the first SCS with the smallest value and the second SCS with the largest value in N optional SCSs corresponding to the PDCCH.

Specifically, N is a positive integer greater than or equal to 2; furthermore, for example, the optional SCS includes at least two of the following: 60KHz,120KHz,240KHz,480KHz,960KHz, 1920KHz, etc. Of course, it should be noted here that the above optional SCS is merely an example, and specific values of the optional SCS are not specifically limited herein.

Furthermore, in particular, in the case of 52.6GHz and above, if the number of optional SCS values supported by the system exceeds 2 { e.g.: SCS (0), SCS (1), … SCS (N-1), where N >2, then the first SCS with the smallest number and the second SCS with the largest number in the optional SCS may be selected as two candidate SCSs.

The following can be explained by the following table.

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

optional SCS

60KHz

120KHz

240KHz

480KHz

960KHz

1920KHz

SCS selectable

0

1

2

3

4

5

First SCS

Candidates for use in a medical device

Second SCS

Candidates for use in a medical device

For another example, the first SCS and the second SCS may be as follows:

optional SCS (n=4)	120KHz	240KHz	480KHz	960KHz
					Index of optional SCS	0	1	2	3
First SCS	Candidates for use in a medical device
					Second SCS				Candidates for use in a medical device

For another example, the first SCS and the second SCS may be as follows:

Optional SCS (n=3)	120KHz	240KHz	480KHz
				Index of optional SCS	0	1	2
First SCS	Candidates for use in a medical device
				Second SCS			Candidates for use in a medical device

In this way, by taking the first SCS with the smallest value and the second SCS with the largest value in the N optional SCSs corresponding to the PDCCH as candidate SCS, the candidate 2 SCS can consider the combined requirement of the SCS with larger value and the SCS with smaller value, and can better meet the design requirement of the SCS with larger or smaller value.

In the second combination, when the N optional SCSs corresponding to the PDCCH are ordered according to the numerical value, the first SCS located at the first trisection point of N or at the ordering position adjacent to the first trisection point of N is ordered, and the second SCS located at the second trisection point of N or at the ordering position adjacent to the second trisection point of N is ordered.

Specifically, in the scenario of 52.6GHz and above, if the system supports more than 2 SCS classes in the alternative { e.g.: SCS (0), SCS (1), … SCS (N-1), assuming SCS (0) < SCS (1) & < SCS (N-1) & gt, candidate SCS may be determined by the number of trisection points of optional SCS.

At this time, the N optional SCSs may be sorted according to the numerical values, for example, the order may be from small to large, and then the N optional SCSs are divided into three segments according to the three-point manner, where the first SCS may be the SCS at the first three-point, and the second SCS is the SCS at the second three-point; of course, if the value of N is not divisible by 3, SCS at the rank adjacent to the first trisection point may be taken as the first SCS and SCS at the rank adjacent to the second trisection point may be taken as the second SCS. The following is a table.

optional SCS

60KHz

120KHz

240KHz

480KHz

960KHz

1920KHz

Index of optional SCS

0

1

2

3

4

5

First SCS

Candidates for use in a medical device

Second SCS

Candidates for use in a medical device

For another example, the first SCS and the second SCS may be as follows:

I.e., the index of the SCS corresponding to the first SCS is N/3, and the index of the SCS 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.

The candidate SCS is determined in a three-point mode, so that the two candidate SCSs can meet the combined requirement of SCS with larger value and SCS with smaller value, and the design requirement of the SCS with larger or smaller value can be better met.

In a third combination, when the N optional SCSs corresponding to the PDCCH are ordered from small to large according to the value, taking the SCS corresponding to the ordering position adjacent to the first trisection point of N or the first trisection point of N as a reference, shifting the first SCS corresponding to the ordering position leftwards, and ordering the second SCS corresponding to the second trisection point of N or the ordering position adjacent to the second trisection point of N.

Specifically, the N optional SCSs may be sorted according to the numerical value, for example, the order may be from small to large, and then the N optional SCSs are divided into three segments according to the manner of three equal division points, where the first SCS may be the SCS when the first three equal division point shifts one sort position to the left, and the second SCS is the SCS on the second three equal division point; of course, if the value of N is not divisible by 3, the SCS at the sorting position adjacent to the first trisection point may be regarded as the first SCS, and the SCS at the sorting position adjacent to the second trisection point may be regarded as the second SCS. The following is a table.

optional SCS

60KHz

120KHz

240KHz

480KHz

960KHz

1920KHz

Optional index (of SCS)

0

1

2

3

4

5

First SCS

Candidates for use in a medical device

Second SCS

Candidates for use in a medical device

For another example, the first SCS and the second SCS may be as follows:

I.e., the index of the SCS corresponding to the first SCS is N/3-1, and the index of the SCS 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 taking the trisection point as a reference for shifting, so that the two candidate SCSs can meet the combined requirement of SCS with larger value and SCS with smaller value, and the design requirement of the SCS with smaller value can be better met.

In a fourth combination, when the N optional SCSs corresponding to the PDCCH are ordered from small to large according to the value, ordering the first SCS located at the first trisection point of N or at the ordering position adjacent to the first trisection point of N, and shifting the second SCS corresponding to the ordering position to the right based on the SCS located at the second trisection point of N or at the ordering position adjacent to the second trisection point of N.

Specifically, the N optional SCSs may be sorted according to the numerical value, for example, the order may be from small to large, and then the N optional SCSs are divided into three segments according to the manner of three equal division points, where the first SCS may be the SCS on the first three equal division point, and the second SCS is the SCS when the second three equal division point shifts 1 sort position to the large numerical value; of course, if the value of N is not divisible by 3, SCS at the rank position adjacent to the first trisection point may be regarded as the first SCS, and SCS at the rank position adjacent to the second trisection point shifted rightward by one rank position may be regarded as the second SCS. The following is a table.

optional SCS

60KHz

120KHz

240KHz

480KHz

960KHz

1920KHz

Optional index (of SCS)

0

1

2

3

4

5

First SCS

Candidates for use in a medical device

Second SCS

Candidates for use in a medical device

For another example, the first SCS and the second SCS may be as follows:

that is, the index of the SCS corresponding to the first SCS is N/3, the index of the SCS 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 taking the trisection point as a reference for offset, so that the two candidate SCSs can meet the combined requirement of SCS with larger value and SCS with smaller value, and the design requirement of SCS with larger value can be better met.

And two,: 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 N optional SCSs corresponding to PDCCH are ordered according to the value from small to large, the first SCS with the smallest value, the second SCS ordered at the first trisection point of N or the ordering position adjacent to the first trisection point of N, and the third SCS ordered at the second trisection point of N or the ordering position adjacent to the second trisection point of N are ordered.

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 1920KHz. It should be noted that the above optional SCS is only an example, and the specific values of the optional SCS are not specifically limited herein.

Furthermore, in particular, in the case of 52.6GHz and above, if the number of optional SCS of channels/signals is greater than 3 { e.g.: SCS (0), SCS (1), … SCS (N-1), assuming SCS (0) < SCS (1) & < SCS (N-1) & gt, candidate SCS may be determined by the number of trisection points of optional SCS.

At this time, the N optional SCSs may be sorted according to the numerical value, for example, the order may be from small to large, and then the N optional SCSs are divided into three segments according to the manner of three equal division points, where the first SCS may be the SCS with the smallest numerical value, the second SCS may be the SCS at the first three equal division point, and the third SCS is the SCS at the second three equal division point; of course, if the value of N is not divisible by 3, SCS at the rank adjacent to the first trisection point may be regarded as the second SCS, and SCS at the rank adjacent to the second trisection point may be regarded as the third SCS. The following is a table.

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

optional SCS

60KHz

120KHz

240KHz

480KHz

960KHz

1920KHz

Index of optional SCS

0

1

2

3

4

5

First SCS

Candidates for use in a medical device

Second SCS

Candidates for use in a medical device

Third SCS

Candidates for use in a medical device

I.e., 60KHz, 240KHz and 960KHz, respectively.

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

optional SCS (n=4)	120KHz	240KHz	480KHz	960KHz
					Index of optional SCS	0	1	2	3
First SCS	Candidates for use in a medical device
					Second SCS		Candidates for use in a medical device
Third SCS			Candidates for use in a medical device

I.e. the first SCS has 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 in the mode, 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 ordered from small to large according to the value, the first SCS with the largest value, the second SCS ordered at the first trisection point of N or the ordering position adjacent to the first trisection point of N, and the third SCS ordered at the second trisection point of N or the ordering position adjacent to the second trisection point of N are ordered.

Specifically, the determination of this manner may be referred to the determination manner of the candidate SCS in one of the above manners, which is not described herein in detail, and is only exemplified by the following table:

optional SCS

60KHz

120KHz

240KHz

480KHz

960KHz

1920KHz

Index of optional SCS

0

1

2

3

4

5

First SCS

Candidates for use in a medical device

Second SCS

Candidates for use in a medical device

Third SCS

Candidates for use in a medical device

From the above table, it is known that the second SCS and the third SCS can be uniformly distributed among SCS other than the first SCS among the alternative SCS, that is, three candidate SCS are 1920KHz, 120KHz and 480KHz, respectively.

I.e., 960KHz, 240KHz and 480KHz, respectively.

Thus, the three candidate SCSs are selected in the mode, and the design requirement of high SCS can be well met.

And in a third combination, when N optional SCSs corresponding to the PDCCH are ordered from small to large according to the value, the first SCS with the smallest value, the second SCS with the largest value and the third SCS which is ordered at the bisector of N or at the ordering position adjacent to the bisector of N are ordered.

Specifically, in this manner, the highest and smallest alternative SCS supported by the system may be used as the first SCS and the second SCS, and SCS of the N alternative SCS intermediate positions may be used as the third SCS.

optional SCS

60KHz

120KHz

240KHz

480KHz

960KHz

1920KHz

Index of optional SCS

0

1

2

3

4

5

First SCS

Candidates for use in a medical device

Second SCS

Candidates for use in a medical device

Third SCS

Candidates for use in a medical device

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

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

Thus, by selecting three candidate SCSs in the above manner, the design requirements of high SCS and low SCS can be completely satisfied.

Third, 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:

first combination: when N selectable SCSs corresponding to the PDCCH are ordered from small to large according to the value, a first SCS with the smallest value, a second SCS ordered at a first quarter point of N or an ordering position adjacent to the first quarter point of N, a third SCS ordered at a second quarter point of N or an ordering position adjacent to the second quarter point of N, and a fourth SCS ordered at a third quarter point of N or an ordering position adjacent to the third quarter point of N are ordered;

A second combination: when N optional SCSs corresponding to PDCCH are ordered according to the value from small to large, a first SCS with the largest value, a second SCS ordered at a first quarter point of N or at an ordering position adjacent to the first quarter point of N, a third SCS ordered at a second quarter point of N or at an ordering position adjacent to the second quarter point of N, and a fourth SCS ordered at a third quarter point of N or at an ordering position adjacent to the third quarter point of N

Third combination: when N optional SCSs corresponding to the PDCCH are ordered from small to large according to the value, a first SCS with the smallest value, a second SCS with the largest value, a third SCS ordered at a first trisection point of N or an ordering position adjacent to the first trisection point of N, and a fourth SCS ordered at a second trisection point of N or an ordering position adjacent to the second trisection point of N;

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

Here, the case when the number of the at least one candidate SCS is 4 may refer to the case when the number of the at least one candidate SCS is 3, and detailed description thereof will not be repeated.

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

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

Fourth, the at least one candidate SCS includes any one of the following:

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

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

For example, taking the PDCCH as type0-PDCCH as an example, assuming that the number of candidate SCSs is 1, the relation of the candidate SCS and SCS of SSB may be shown in the following table,

	120KHz	240KHz	480KHz	960KHz
					SSB:60KHz	candidates for use in a medical device
SSB:120KHz		Candidates for use in a medical device
					SSB:240KHz		Candidates for use in a medical device

I.e. after the terminal searches for and receives the SSB, it can obtain the SCS of the SSB, and at this time, it can obtain the candidate SCS of the type0-PDCCH correspondingly, e.g. when the SCS of the SSB is 240KHz, the candidate SCS of the type0-PDCCH is 480KHz.

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

	120KHz	240KHz	480KHz	960KHz	1920KHz
						SSB:60KHz	candidates for use in a medical device	Candidates for use in a medical device
SSB:120KHz		Candidates for use in a medical device	Candidates for use in a medical device
						SSB:240KHz			Candidates for use in a medical device	Candidates for use in a medical device
SSB:480KHz				Candidates for use in a medical device	Candidates for use in a medical device

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

This allows the network to flexibly configure SCS parameters of the PDCCH by determining at least one candidate SCS in association with the SCS of the SSB, reducing the information overhead indicating candidate SCS.

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

specifically, at least one candidate SCS may be further associated with an operation frequency band, for example, when the frequency of the spectrum is greater than 52.6GHz, the 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, and when the terminal searches for the SSB in the corresponding operation frequency band, the candidate SCS of the Type0-PDCCH may correspond to 1 or more values, and the corresponding method may be determined by the protocol. The candidate SCS determined by the interface protocol is shown in the following table:

Frequency numbering	Frequency range	Candidate SCS of Type0-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 the type0-PDCCH in a specific certain operation frequency band, its candidate SCS may be selected from the SCS corresponding to the above table. For example, for FR2100, there are two candidate SCSs for type0-PDCCH, 120KHz,240 KHz; for another example, for FR2108, there is one candidate SCS of 960KHz for its type 0-PDCCH.

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

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

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

i.e., when the cell of the base station is in a specific operating frequency band, SCS of SSB is selected first, and then candidate SCS is selected according to SCS of SSB. For example, when the terminal searches on the FR2100, it searches for SSB first, and the SCS of SSB is searched for 120KHz and 240KHz; if the SCS of the searched SSB is 120KHz, candidate SCS of the type0-PDCCH has 120KHz or 240KHz; if the SCS of the searched SSB is 240KHz, candidate SCS of the type0-PDCCH has 240KHz or 480KHz. For another example, when the terminal searches on FR2104, it searches for SSB first, and searches for SSB SCS having 480KHz and 960KHz; if the SCS of the searched SSB is 480KHz, candidate SCS of the type0-PDCCH has 480KHz or 960KHz; if the SCS of the searched SSB is 960KHz, the candidate SCS of the type0-PDCCH has 960KHz.

In this 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, and this 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 used for indicating at least one of the following:

indicating whether the base station supports the preset terminal capability;

indicating whether the base station supports a preset service;

and indicating a channel interception mode configured by the base station when the frequency spectrum is unlicensed, wherein the channel interception mode comprises a static interception mode and a non-static interception mode.

That is, when the number of candidate SCSs is 1, the indication information may represent a default target SCS, and at least one of the above information may be indicated with the indication information; for example, when indicating whether the base station supports the preset terminal capability, 0 indicates terminal access supporting the preset terminal capability, and 1 indicates terminal access not supporting the preset terminal capability; for another example, when the base station indicates whether to support the preset service, the preset service may be a low-delay 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 interception mode configured by the base station in unlicensed spectrum is indicated, 0 indicates that the static channel interception mode is adopted, and 1 indicates that the non-static channel interception mode is adopted.

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

Wherein the target SCS used by the PDCCH is indicated to be a first SCS when the value of the 1-bit information is a first preset value, and the target SCS used by the PDCCH is indicated to be 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 SCS in the candidate SCS. At this time, the target SCS may be indicated as the first SCS when the value of the 1-bit information is 0, and the target SCS may be 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 for the PDCCH is indicated to be the first SCS when the combination of values of the 2-bit information is the first combination, the target SCS used for the PDCCH is indicated to be the second SCS when the combination of values of the 2-bit information is the second combination, the target SCS used for the PDCCH is indicated to be the third SCS when the combination of values of the 2-bit information is the third combination, and the target SCS used for the PDCCH is indicated to be the fourth SCS when the combination of values of the 2-bit information is the 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.

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

The first indication information is 1bit information and is used for indicating a packet where a target SCS is located;

the second indication information is 1-bit PBCH reservation information, and is 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, wherein the first state combination in the state combination indicates that the target SCS is a first SCS in the group in which the target SCS is located, and the second state combination in the state combination indicates that the target SCS is a second SCS in the group in which the target SCS is located.

This will be described by way of example.

Assuming that the number of candidate SCSs is 3 and that the 3 SCSs are divided into two groups, group 1= { SCS1, SCS2}, group 2= { SCS3}. The first indication information is 1bit information at this time, for example, 1bit in the MIB indicates the SCS set used, and 0 may be used to indicate set 1, and 1 may be used to indicate set 2. Let us assume that group 1 is indicated in the present embodiment.

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

Specifically, when the second indication information is a state combination corresponding to the ControlResourceSetZero indicated by the PBCH, 4bit information may be occupied in the ControlResourceSetZero, and 16 state combinations (0, 1, 2-15) may be used in total. At this point, of the 16 state combinations, the first state combination indicates one SCS in the set, e.g., indicates SCS1 or SCS2 in set 1, and the second state combination indicates the other SCS in set 1. The indication process can be illustrated by the following table:

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

It should be noted that, in the above table, the SCS is identified and differentiated by using the index indication, however, the above table may be formulated into 2 tables, and the length of each table does not exceed 8 combinations (3 bit information length), so that the total is 4 bits, 1bit indicates which set of SCS is used by the PDCCH, and the remaining 3 bits indicate the configuration combination of CORESET. In addition, the searches 0-7 and 8-15 in the above table are configured identically, but of course, the content thereof may be configured differently by way of example only and is not limited thereto.

Therefore, the target SCS is indicated through the control resource set parameter, and when the SCS of the SSB is larger than 60KHz in the current NR system, some combinations are not used in 16 COERESET combinations, so that SCS distinction can be performed by using the existing combinations which are reserved and not used, better compatibility of the existing design is realized, and complexity of protocol formulation is reduced.

In addition, specifically, when the second indication information is a state combination corresponding to the search space (searchSpaceZero) indicated by the PBCH, 4bit information may be occupied in the searchSpaceZero indication, and 16 states (0, 1, 2-15) are total. At this time, among 16 state combinations, the first state combination indicates 1 SCS of the group 1, and the second state combination indicates the other 1 SCS of the 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 when SSB is 240KHz is shown. For example, when the search space index value is 0, SCS indicating PDCCH is 240KHz, and when the index value is 2, SCS indicating PDCCH is 480KHz.

Here, the index value is used to indicate the SCS identification and discrimination in the above table. Of course, the above table may be formulated into 2 tables, and the length of each table does not exceed 8 combinations (3 bit information length), so that among the total 4 bits, 1bit indicates which SCS is used for PDCCH, and the remaining 3 bits indicate search space configuration combination. Further, the configuration contents of 0 and 2 in the above table are the same, and of course, are only examples herein, and the contents thereof may be configured differently, without limitation.

The target SCS is indicated through the state combination corresponding to the search space, and when the SCS of the SSB is larger than 120KHz in the current NR system, some combinations are not used in 16 search space combinations, so that SCS distinction can be performed by utilizing the existing combinations which are reserved and not used, better compatibility of the existing design is realized, and complexity of protocol formulation is reduced.

Of course, it should be noted that when the number of candidate SCS is greater than or equal to 3, new indication information is required, and this embodiment uses 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 be used for indication, and will not be described here.

In this way, the indication procedure of the target SCS when the number of at least one candidate SCS is 1, 2, 3 and 4, respectively, is achieved in several ways as described above.

The terminal in this embodiment obtains at least one candidate SCS adopted by the PDCCH, receives the PBCH sent by the base station, and carries indication information for indicating the target SCS adopted by the PDCCH, so that the terminal can obtain the target SCS from the at least one candidate SCS based on the indication information, thereby realizing that the indication Type0-PDCCH can be more flexible, and can support more SCS candidate types.

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

step 201: at least one candidate SCS employed by the PDCCH is acquired, and a PBCH is transmitted to the terminal.

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

In this way, by sending the PBCH to the terminal, wherein the PBCH carries the indication information for indicating the target SCS adopted by the PDCCH, and the target SCS is one of the obtained candidate SCSs, the terminal can obtain the target SCS from the candidate SCSs 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.

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

It should be noted that, the method for obtaining the candidate SCS may refer to the corresponding description on the terminal side, and will not be described herein.

It should be noted that, the specific content of the combination manner of the above-mentioned various first SCS and second SCS may refer to the corresponding content of the terminal side, and will not be described herein.

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; furthermore, for example, the optional SCS includes at least three of the following: 60KHz,120KHz,240KHz,480KHz,960KHz and 1920KHz. Of course, it should be noted here that the above optional SCS is merely an example, and specific values of the optional SCS are not specifically limited herein.

It should be noted that, the specific content of the combination manner of the above-mentioned various first SCS, second SCS and third SCS may refer to the corresponding content of the terminal side, and will not be described herein.

In the first combination, when the N optional SCSs corresponding to the PDCCH are ordered from small to large according to the value, the first SCS with the smallest value, the second SCS ordered at the first quarter point of N or at the ordering position adjacent to the first quarter point of N, the third SCS ordered at the second quarter point of N or at the ordering position adjacent to the second quarter point of N, and the fourth SCS ordered at the third quarter point of N or at the ordering position adjacent to the third quarter point of N are ordered.

In the second combination, when the N selectable SCSs corresponding to the PDCCH are ordered according to the value from small to large, the first SCS with the largest value, the second SCS ordered at the first quarter point of N or the ordering position adjacent to the first quarter point of N, the third SCS ordered at the second quarter point of N or the ordering position adjacent to the second quarter point of N, and the fourth SCS ordered at the third quarter point of N or the ordering position adjacent to the third quarter point of N are ordered.

In a third combination, when the N selectable SCSs corresponding to the PDCCH are ordered from small to large according to the value, the first SCS with the smallest value, the second SCS with the largest value, the third SCS ordered at the first trisection point of N or at the ordering position adjacent to the first trisection point of N, and the fourth SCS ordered at the second trisection point of N or at the ordering position adjacent to the second trisection point of N.

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

It should be noted that, the specific content of the above-mentioned combination manners of the first SCS, the second SCS, the third SCS, and the fourth SCS may be referred to the corresponding content of the terminal side, and will not be described herein.

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

Fourth, the at least one candidate SCS includes any one of the following:

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

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

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

The relevant content of the above items may be referred to the corresponding content of the terminal side, and will not be described herein.

indicating whether the base station supports the preset terminal capability;

indicating whether the base station supports a preset service;

It should be noted that, the specific description of the above items may refer to the corresponding content of the terminal side, and will not be repeated here.

It should be noted that, the specific description of the above situation may refer to the corresponding content of the terminal side, and will not be repeated here.

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 used by the PDCCH is indicated to be the first SCS when the combination of values of the 2-bit information is the first combination, the target SCS used by the PDCCH is indicated to be the second SCS when the combination of values of the 2-bit information is the second combination, the target SCS used by the PDCCH is indicated to be the third SCS when the combination of values of the 2-bit information is the third combination, and the target SCS used by the PDCCH is indicated to be the fourth SCS when the combination of values of the 2-bit information is the fourth combination.

Fourth, 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 at most two candidate SCSs are included in each group, the indication information includes first indication information and second indication information.

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

the second indication information is 1-bit PBCH reservation information, and is used for indicating the position of the target SCS in a packet where the target SCS is located; or,

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

Thus, the base station in this embodiment obtains at least one candidate SCS adopted by the PDCCH and sends the PBCH to the terminal, wherein the PBCH carries indication information for indicating the target SCS adopted by the PDCCH, and the target SCS is one of the at least one candidate SCS, so that the indication of the target SCS in the NR system is realized.

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

a first obtaining module 301, configured to obtain at least one candidate subcarrier spacing SCS adopted 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 for indicating a target SCS adopted by the PDCCH, and the target SCS is one of the at least one candidate SCS;

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

It should be noted that, the device in this embodiment can implement all method steps on the terminal side, and can achieve the same technical effects, and repeated descriptions are omitted here.

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

An obtaining module 401, configured to obtain at least one candidate subcarrier spacing SCS adopted 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 adopted 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 on the base station side, and can achieve the same technical effects, and repeated descriptions are omitted here.

In addition, fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention, 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 bus system 505 is used to enable connected 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. But for clarity of illustration the various buses are labeled as bus system 505 in fig. 5.

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

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

In some implementations, the memory 502 stores elements, executable modules or data structures, or a subset thereof, or an extended 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, for implementing various basic services and processing hardware-based tasks. The application 5022 includes various application programs such as a Media Player (Media Player), a Browser (Browser), and the like for realizing various application services. A program for implementing the method according to the embodiment of the present invention may be included in the application 5022.

In the embodiment of the present invention, the processor 501 is configured to, 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: acquiring at least one candidate sub-carrier 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 in the above embodiment 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 circuitry in hardware or instructions in software in the processor 501. The processor 501 may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks 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 embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory 502, and the processor 501 reads information in the memory 502 and, in combination with its hardware, performs the steps of the method described above.

It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For a hardware implementation, the processing units may be implemented within one or more application specific integrated circuits (Application Specific Integrated Circuits, ASIC), digital signal processors (Digital Signal Processing, DSP), digital signal processing devices (DSP devices, DSPD), programmable logic devices (Programmable Logic Device, PLD), field programmable gate arrays (Field-Programmable Gate Array, FPGA), general purpose processors, controllers, microcontrollers, 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 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 used to indicate at least one of the following: indicating whether the base station supports the preset terminal capability; indicating whether the base station supports a preset service; and indicating a channel interception mode configured by the base station when the frequency spectrum is unlicensed, wherein the channel interception mode comprises a static interception mode and a non-static interception mode.

Alternatively, 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 used by the PDCCH is indicated to be a first SCS when the value of the 1-bit information is a first preset value, and the target SCS used by the PDCCH is indicated to be a second SCS when the value of the 1-bit information is a second preset value.

Alternatively, 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 used by the PDCCH is indicated to be the first SCS when the combination of values of the 2-bit information is the first combination, the target SCS used by the PDCCH is indicated to be the second SCS when the combination of values of the 2-bit information is the second combination, the target SCS used by the PDCCH is indicated to be the third SCS when the combination of values of the 2-bit information is the third combination, and the target SCS used by the PDCCH is indicated to be the fourth SCS when the combination of values of the 2-bit information is the fourth combination.

Alternatively, 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 at most two candidate SCSs are included in each group, the indication information includes first indication information and second indication information; the first indication information is 1 bit information and is used for indicating a packet where the target SCS is located; the second indication information is 1-bit PBCH reservation information, and is used for indicating the position of the target SCS in a 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, wherein a first state combination in the state combination 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 combination indicates that the target SCS is a second SCS in the group where the target SCS is located.

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

Alternatively, 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:

the first SCS with the smallest numerical value and the second SCS with the largest numerical value in the N selectable SCSs corresponding to the PDCCH; when N optional SCSs corresponding to the PDCCH are ordered according to the numerical value, ordering a first SCS positioned at a first trisection point of N or an ordering position adjacent to the first trisection point of N, and ordering a second SCS positioned at a second trisection point of N or an ordering position adjacent to the second trisection point of N; when N selectable SCSs corresponding to PDCCH are ordered from small to large according to the value, taking SCSs corresponding to the ordering position adjacent to the first trisection point of N as a reference, shifting the first SCS corresponding to one ordering position leftwards, and ordering the second SCS on the second trisection point of N or the ordering position adjacent to the second trisection point of N; when N selectable SCSs corresponding to PDCCH are ordered from small to large according to the value, ordering a first SCS positioned at a first trisection point of N or an ordering position adjacent to the first trisection point of N, and shifting a second SCS corresponding to one ordering position rightwards based on an SCS positioned at a second trisection point of N or an ordering position adjacent to the second trisection point of N; wherein N is a positive integer greater than or equal to 2.

The terminal provided by the embodiment of the invention can realize each process realized by the terminal in the previous embodiment, and in order to avoid repetition, the description is omitted here.

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 (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, audio circuits 670, wiFi (Wireless Fidelity) modules 680, and a power supply 690. It will be appreciated by those skilled in the art that the handset construction shown in fig. 2 is not limiting of the handset and may include more or fewer components than shown, or may combine certain components, or split certain components, or a different arrangement of components.

The input unit 630 may be used 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, may collect touch operations thereon or thereabout by a user (e.g., operations of the user on the touch panel 6301 using any suitable object or accessory such as a finger, a stylus, etc.), and drive the corresponding connection device according to a predetermined program. Alternatively, the touch panel 6301 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch azimuth 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 detection device and converts it into touch point coordinates, which are then sent to the processor 660, and can receive commands from the processor 660 and execute them. In addition, the touch panel 6301 may be implemented in various types such as resistive, capacitive, infrared, and 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 numerical 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 (e.g., 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 so forth.

Among them, the display unit 640 may be used to display information input by a user or 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 in the form of a liquid crystal display (Liquid Crystal Display, LCD), an organic light-Emitting Diode (OLED), or the like.

It should be noted that the touch panel 6301 may overlay the display panel 6401 to form a touch display screen that, upon detecting a touch operation thereon or thereabout, is communicated to the processor 660 to determine the type of touch event, and the processor 660 then provides a corresponding visual output on the touch display screen based on the type of 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 up-down arrangement, left-right arrangement and the like, and the arrangement modes of the two display areas can be distinguished. The application interface display area may be used to display an interface of an application. Each interface may contain at least one application's icon and/or interface elements such as a widget desktop control. The application interface display area may be an empty interface that does not contain any content. The common control display area is used for displaying controls with higher use rate, such as application icons including 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 the process of receiving and transmitting information or communication, in particular, after receiving downlink information on the network side, the downlink information is processed by the processor 660; in addition, the data of the design uplink is sent to the network side. Typically, the RF circuitry 610 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier (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 (Global System of Mobilecommunication, GSM), general packet radio service (General Packet Radio Service, GPRS), code division multiple access (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband CodeDivision Multiple Access, WCDMA), long term evolution (Long Term Evolution, LTE), email, short message service (Short Messaging Service, SMS), and the like.

The memory 620 is used to store software programs and modules, and the processor 660 performs various functional applications and data processing of the mobile terminal by executing 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, application programs required for 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, phonebooks, etc.) created according to the use of the mobile terminal, etc. In addition, 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, and connects various parts of the entire mobile phone using various interfaces and lines, and performs various functions of the mobile terminal and processes data 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 performing overall monitoring of the mobile terminal. In the alternative, processor 660 may include one or more processing units.

In the embodiment of the present invention, by calling a software program and/or a module stored in the first memory 6201 and/or data in the second memory 6202, the processor 660 is configured to obtain at least one candidate subcarrier spacing SCS adopted 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 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.

Fig. 7 is a schematic 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 base station 700 are coupled together by bus system 705. It is appreciated that the bus system 705 is used to enable connected communications between these components. The bus system 705 includes a power bus, a control bus, and a status signal bus in addition to the data bus. The various buses are labeled in fig. 7 as a bus system 705 for clarity, which may include any number of interconnected buses and bridges, with the various circuits of the one or more processors, as represented by processor 701, and the memory, as represented by memory 702, being linked together. The bus system may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., all as are well known in the art and, therefore, further description of embodiments of the present invention will not be provided. The bus interface provides an interface. The transceiver 704 may be a number of elements, i.e. include a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium. The user interface 703 may also be an interface capable of interfacing with an inscribed desired device for a different user device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

It is to be appreciated that memory 702 in embodiments of the invention may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DRRAM). The memory 702 of the systems and methods described in 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 for use by the processor 1001 in performing operations, and in particular, the processor 701 may be configured to: and acquiring at least one candidate sub-carrier interval (SCS) adopted by the Physical Downlink Control Channel (PDCCH), and sending a Physical Broadcast Channel (PBCH) to the 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 embodiment 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 performed by integrated logic circuits of hardware in the processor 701 or by instructions in the form of software. The processor 701 described above may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks 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 embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory 702, and the processor 701 reads information in the memory 702 and performs the steps of the method in combination with its hardware.

The base station provided by the embodiment of the present invention can implement each process implemented by the base station in the foregoing embodiment, and in order to avoid repetition, details are not repeated here.

The above description mainly describes the scheme provided by the embodiment of the present invention from the perspective of the base station. It can be understood that, in order to implement the above functions, the base station provided in the embodiment of the present invention includes corresponding hardware structures and/or software modules that perform each function. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software.

Whether a function is implemented as hardware or computer software driven 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.

The embodiment of the invention can divide the functional modules of the electronic equipment and the like according to the method example, for example, each functional module can be divided corresponding to each function, and two or more functions can be integrated in one processing module. The integrated modules may be implemented in hardware or in software functional modules.

It should be noted that, in the embodiment of the present invention, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to perform all or part of the functions described above. The specific working processes of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which are not described herein.

In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices, or units.

The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. With such understanding, all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, comprising instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods described in the embodiments of the invention. The computer storage medium is a non-transitory (english) medium comprising: flash memory, removable hard disk, read-only memory, random access memory, magnetic or optical disk, and the like.

On the other hand, the 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, which is not described herein again.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

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

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

the at least one candidate SCS includes SCS employed for PDCCH in the frequency spectrum of 52.6GHz and above;

the obtaining at least one candidate subcarrier spacing SCS adopted by the physical downlink control channel PDCCH includes:

acquiring at least one candidate SCS adopted by a PDCCH predefined by a protocol; or,

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

the at least one candidate SCS includes any one of:

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

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 one of the following combinations:

the first SCS with the smallest numerical value and the second SCS with the largest numerical value in the N selectable SCSs corresponding to the PDCCH;

when N optional SCSs corresponding to the PDCCH are ordered according to the numerical value, ordering a first SCS positioned at a first trisection point of N or an ordering position adjacent to the first trisection point of N, and ordering a second SCS positioned at a second trisection point of N or an ordering position adjacent to the second trisection point of N;

when N selectable SCSs corresponding to PDCCH are ordered from small to large according to the value, taking SCSs corresponding to the ordering position adjacent to the first trisection point of N as a reference, shifting the first SCS corresponding to one ordering position leftwards, and ordering the second SCS on the second trisection point of N or the ordering position adjacent to the second trisection point of N;

when N selectable SCSs corresponding to PDCCH are ordered from small to large according to the value, ordering a first SCS positioned at a first trisection point of N or an ordering position adjacent to the first trisection point of N, and shifting a second SCS corresponding to one ordering position rightwards based on an SCS positioned at a second trisection point of N or an ordering position adjacent to the second trisection point of N;

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

2. The subcarrier spacing indication method according to 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 used for indicating at least one of the following:

indicating whether the base station supports the preset terminal capability;

indicating whether the base station supports a preset service;

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

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

5. The subcarrier spacing indication method according to claim 1, wherein the indication information includes first indication information and 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 at most two candidate SCSs are included in each group;

6. The subcarrier spacing indication method of claim 1 wherein 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:

When N selectable SCSs corresponding to the PDCCH are ordered from small to large according to the value, a first SCS with the smallest value, a second SCS ordered at a first trisection point of N or an ordering position adjacent to the first trisection point of N, and a third SCS ordered at a second trisection point of N or an ordering position adjacent to the second trisection point of N are ordered;

when N selectable SCSs corresponding to the PDCCH are ordered from small to large according to the value, a first SCS with the largest value, a second SCS ordered at a first trisection point of N or an ordering position adjacent to the first trisection point of N, and a third SCS ordered at a second trisection point of N or an ordering position adjacent to the second trisection point of N are ordered;

when N optional SCSs corresponding to the PDCCH are ordered from small to large according to the value, a first SCS with the smallest value, a second SCS with the largest value and a third SCS which is ordered at the bisector of N or at the ordering position adjacent to the bisector of N are ordered;

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

7. The subcarrier spacing indication method of claim 1 wherein 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:

When N selectable SCSs corresponding to the PDCCH are ordered from small to large according to the value, a first SCS with the smallest value, a second SCS ordered at a first quarter point of N or an ordering position adjacent to the first quarter point of N, a third SCS ordered at a second quarter point of N or an ordering position adjacent to the second quarter point of N, and a fourth SCS ordered at a third quarter point of N or an ordering position adjacent to the third quarter point of N are ordered;

when N selectable SCSs corresponding to the PDCCH are ordered from small to large according to the value, a first SCS with the largest value, a second SCS ordered at a first quarter point of N or an ordering position adjacent to the first quarter point of N, a third SCS ordered at a second quarter point of N or an ordering position adjacent to the second quarter point of N, and a fourth SCS ordered at a third quarter point of N or an ordering position adjacent to the third quarter point of N are ordered;

when N optional SCSs corresponding to the PDCCH are ordered from small to large according to the value, a first SCS with the smallest value, a second SCS with the largest value, a third SCS ordered at a first trisection point of N or an ordering position adjacent to the first trisection point of N, and a fourth SCS ordered at a second trisection point of N or an ordering position adjacent to the second trisection point of N;

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

8. The subcarrier spacing indication method according to claim 1, 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 at most two candidate SCSs are included in each group.

9. The subcarrier spacing indication method according to claim 1, said at least one candidate SCS being associated with an SCS and an operating frequency band of an SSB, further comprising:

when the operation frequency band is located on the extended frequency band of the frequency range FR2, the association relationship between the candidate SCS and the SCS of the SSB is at least one of the following:

when SCS of SSB is 960KHz, candidate SCS is 960KHz;

when SCS of SSB is 480KHz, candidate SCS is 480KHz;

when the SCS of the SSB is 120KHz, the candidate SCS is 120KHz.

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

acquiring at least one candidate sub-carrier interval (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;

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

the at least one candidate SCS includes any one of:

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

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

11. The subcarrier spacing indication method according to claim 10, wherein when the number of the at least one candidate SCS is 1, the indication information is 1-bit information, and is further used for indicating at least one of the following:

indicating whether the base station supports the preset terminal capability;

indicating whether the base station supports a preset service;

12. The subcarrier spacing indication method according to claim 10, wherein the indication information is 1-bit information when the number of the at least one candidate SCS is 2;

13. The subcarrier spacing indication method according to claim 10, wherein the indication information is 2-bit information when the number of the at least one candidate SCS is 3 or 4;

14. The subcarrier spacing indication method according to claim 10, wherein the indication information includes first indication information and 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 at most two candidate SCSs are included in each group;

15. The subcarrier spacing indication method of claim 10 wherein 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:

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

16. The subcarrier spacing indication method of claim 10 wherein 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:

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

17. The subcarrier spacing indication method according to claim 10, 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 at most two candidate SCSs are included in each group.

18. The subcarrier spacing indication method according to claim 10, said at least one candidate SCS being associated with an SCS and an operating frequency band of an SSB, further comprising:

when the operating band is located on the extended band of the frequency range FR 2: the association relation between candidate SCS and SCS of SSB is at least one of the following:

when SCS of SSB is 960KHz, candidate SCS is 960KHz;

when SCS of SSB is 480KHz, candidate SCS is 480KHz;

when the SCS of the SSB is 120KHz, the candidate SCS is 120KHz.

19. A subcarrier spacing indicating apparatus, comprising:

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

the at least one candidate SCS includes any one of:

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

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

20. A subcarrier spacing indicating apparatus, comprising:

an obtaining module, configured to obtain at least one candidate subcarrier spacing SCS adopted by a physical downlink control channel PDCCH, and send a physical broadcast channel PBCH to a terminal, where 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 at least one candidate SCS includes any one of:

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

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

21. A terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the following steps when executing the computer program:

The at least one candidate SCS includes any one of:

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

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

22. The terminal of claim 21, 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 a preset service;

23. The terminal according to claim 21, wherein when the number of the at least one candidate SCS is 2, the indication information is 1-bit information;

24. The terminal according to claim 21, wherein when the number of the at least one candidate SCS is 3 or 4, the indication information is 2-bit information;

25. The terminal of claim 21, wherein the indication information includes 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 at most two candidate SCSs are included in each group;

26. The terminal of claim 21, wherein 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:

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

27. A base station comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the following steps when executing the computer program:

The at least one candidate SCS includes any one of:

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

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

28. The base station of claim 27 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:

indicating whether the base station supports the preset terminal capability;

indicating whether the base station supports a preset service;

29. The base station of claim 27 wherein the indication information is 1-bit information when the number of the at least one candidate SCS is 2;

30. The base station according to claim 27, wherein the indication information is 2-bit information when the number of the at least one candidate SCS is 3 or 4;

31. A non-transitory computer readable storage medium having stored thereon a computer program, characterized in that the computer program when executed by a processor implements the steps of the subcarrier spacing indication method according to any of claims 1 to 9 or the steps of the subcarrier spacing indication method according to any of claims 10 to 18.