CN110519032B

CN110519032B - PTRS sending and extracting method and device, storage medium, base station and terminal

Info

Publication number: CN110519032B
Application number: CN201910784267.7A
Authority: CN
Inventors: 王钰华; 王化磊
Original assignee: Spreadtrum Semiconductor Nanjing Co Ltd
Current assignee: Spreadtrum Semiconductor Nanjing Co Ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2022-06-24
Anticipated expiration: 2039-08-23
Also published as: CN110519032A

Abstract

A PTRS sending and extracting method and device, a storage medium, a base station and a terminal are provided, wherein the sending method comprises the following steps: determining indication information, wherein the indication information is at least used for indicating whether a cell level single carrier PTRS exists; and configuring the indication information in broadcast information and sending the indication information. Through the technical scheme provided by the embodiment of the invention, a feasible technical scheme can be provided for sending the cell-level single carrier PTRS.

Description

PTRS sending and extracting method and device, storage medium, base station and terminal

Technical Field

The invention relates to the technical field of communication, in particular to a PTRS sending and extracting method and device, a storage medium, a base station and a terminal.

Background

A Downlink (DL) Phase-Tracking Reference Signal (PTRS) of the 3rd Generation Partnership Project (3 GPP) is a Reference Signal of a User Equipment (UE) level, that is, a multi-carrier waveform of the UE level, and accordingly, a configuration of the multi-carrier PTRS is also a configuration of the UE level. Further, the PTRS of satellite communication is a cell-level single carrier reference signal.

However, the PTRS design scheme in direct satellite communication is not suitable for wireless communication, and therefore, how to design cell-level single carrier PTRS needs further research.

Disclosure of Invention

The technical problem solved by the invention is how to configure the cell level single carrier PTRS.

To solve the foregoing technical problem, an embodiment of the present invention provides a method for sending a PTRS, including: determining indication information, wherein the indication information is at least used for indicating whether a cell level single carrier PTRS exists; and configuring the indication information in broadcast information and sending the indication information.

Optionally, the indication information includes a time domain density of the cell-level single carrier PTRS.

Optionally, the time domain density occupation

A number of bits, the time domain density being selected from a preset set of time domain densities comprising F elements, wherein F is a positive integer,

meaning rounding up.

Optionally, the F elements include element 0, where the element 0 indicates that the cell-level single carrier PTRS does not exist.

Optionally, the sending method further includes: and configuring the total number of samples of the cell level single-carrier PTRS and the number of PTRSs contained in each group of the cell level single-carrier PTRS in an RRC information unit.

Optionally, the sending method further includes: and configuring the total number of samples of the cell-level single carrier PTRS and the number of groups of the cell-level single carrier PTRS in an RRC information unit.

Optionally, the sending method further includes: and configuring the sample density of the cell-level single-carrier PTRS and the number of PTRSs contained in each group of the cell-level single-carrier PTRS in an RRC information unit.

Optionally, the indication information further includes a total number of samples of the cell-level single-carrier PTRS and a number of PTRS included in each group of the cell-level single-carrier PTRS.

Optionally, the cell level single carrier PTRSTotal number of samples occupied

A number of bits, the total number of samples being selected from a preset total number of samples set comprising N elements, the number of PTRSs occupying

A number of bits, said number of PTRSs being selected from a set of preset numbers of PTRSs comprising M elements, M, N all being positive integers,

meaning rounding up.

Optionally, the N elements include element 0, and the element 0 indicates that the cell-level single carrier PTRS does not exist.

Optionally, the indication information further includes a total number of samples of the cell level single carrier PTRS and a number of packets of the cell level single carrier PTRS.

Optionally, the total number of samples of the cell-level single carrier PTRS occupies

A number of bits, the total number of samples being selected from a preset set of total numbers of samples comprising P elements, the number of packets occupying

A number of bits selected from a set of predetermined numbers of groupings comprising Q elements, P, Q all being positive integers,

meaning rounding up.

Optionally, the P elements include element 0, and the element 0 indicates that the cell-level single carrier PTRS does not exist.

Optionally, the indication information further includes a sample density of the cell-level single-carrier PTRS and a number of PTRS included in each group of the cell-level single-carrier PTRS.

Optionally, theSample density occupancy for cell-level single carrier PTRS

A number of bits, the sample density selected from a preset sample density set containing K elements, the number of PTRSs occupying

A number of bits, said number of PTRSs being selected from a set of preset numbers of PTRSs comprising L elements, K, L all being positive integers,

meaning rounding up.

Optionally, the K elements include element 0, and the element 0 indicates that the cell-level single carrier PTRS does not exist.

Optionally, the RRC information unit is a PDSCH configuration general information unit.

Optionally, the broadcast information is a main information block or an auxiliary information block.

In order to solve the above technical problem, an embodiment of the present invention further provides a method for extracting a PTRS, including: receiving broadcast information, wherein the broadcast information comprises indication information, and the indication information is at least used for indicating whether a cell level single carrier PTRS exists; and extracting the indication information.

Optionally, the time domain density occupation

meaning rounding up.

Optionally, the F elements include element 0, and the element 0 indicates that the cell-level single carrier PTRS does not exist.

Optionally, the extraction method further includes: and extracting the total number of samples of the cell-level single-carrier PTRS in an RRC information unit and the number of PTRSs contained in each group of the cell-level single-carrier PTRS.

Optionally, the extraction method further includes: and extracting the total number of samples of the cell-level single carrier PTRS and the number of groups of the cell-level single carrier PTRS in an RRC information unit.

Optionally, the extraction method further includes: and extracting the sample density of the cell-level single-carrier PTRS in an RRC information unit and the number of PTRSs contained in each group of the cell-level single-carrier PTRS.

meaning rounding up.

Optionally, the N elements include an element 0, where the element 0 indicates that the cell-level single carrier PTRS does not exist.

Optionally, the indication information further includes a total number of samples of the cell-level single carrier PTRS and a number of packets of the cell-level single carrier PTRS.

meaning rounding up.

Optionally, the indication information further includes a time domain density of the cell-level single-carrier PTRS and a number of PTRS included in each group of the cell-level single-carrier PTRS.

Optionally, the sample density occupation of the cell-level single carrier PTRS

meaning rounding up.

Optionally, the broadcast information is a master information block or a system information block.

To solve the foregoing technical problem, an embodiment of the present invention further provides a PTRS sending apparatus, including: a determining module, configured to determine indication information, where the indication information is at least used to indicate whether a cell level single carrier PTRS exists; and the sending module is used for configuring the indication information in the broadcast information and sending the indication information.

To solve the above technical problem, an embodiment of the present invention further provides an apparatus for extracting a PTRS, including: a receiving module, configured to receive broadcast information, where the broadcast information includes indication information, and the indication information is at least used to indicate whether a cell level single carrier PTRS exists; and the extraction module is used for extracting the indication information.

To solve the above technical problem, an embodiment of the present invention further provides a storage medium having stored thereon computer instructions, where the computer instructions execute the steps of the above method when executed.

In order to solve the above technical problem, an embodiment of the present invention further provides a base station, including a memory and a processor, where the memory stores computer instructions executable on the processor, and the processor executes the computer instructions to perform the steps of the above method.

In order to solve the foregoing technical problem, an embodiment of the present invention further provides a terminal, including a memory and a processor, where the memory stores computer instructions executable on the processor, and the processor executes the computer instructions to perform the steps of the foregoing method.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

the embodiment of the invention provides a PTRS sending method, which comprises the following steps: determining indication information, wherein the indication information is at least used for indicating whether a cell level single carrier PTRS exists; and configuring the indication information in broadcast information and sending the indication information. Aiming at the downlink cell-level PTRS of the single carrier, the embodiment of the invention provides a feasible scheme for sending the cell-level single carrier PTRS by the broadcast information carrying the indication information of whether the cell-level single carrier PTRS exists.

Further, the indication information includes a time domain density of the cell-level single carrier PTRS. The embodiment of the invention can also configure the time domain density of the cell-level single carrier PTRS for the UE through the broadcast information, and further provides a feasible scheme for the UE to determine the PTRS. Moreover, when the cell-level single carrier PTRS is configured, the PTRS time domain density is configured instead of a threshold configuration mode, so that the overhead of high-level signaling can be saved.

Further, the indication information further includes a total number of samples of the cell-level single-carrier PTRS and a number of PTRS included in each group of the cell-level single-carrier PTRS. The embodiment of the invention indicates whether the cell-level single carrier PTRS exists or not through the broadcast information, and indicates the total number of the samples of the PTRS and the number of the PTRS contained in each group when the PTRS exists, thereby further providing possibility for the UE to receive the cell-level single carrier PTRS.

Further, still include: and configuring the total number of samples of the cell-level single-carrier PTRS and the number of PTRSs contained in each group of the cell-level single-carrier PTRS in an RRC information unit. The embodiment of the invention indicates whether the cell level single carrier PTRS exists or not through the broadcast information, and further indicates the total number of samples of the cell level single carrier PTRS and the number of PTRSs contained in each group through RRC signaling.

Drawings

Fig. 1 is a flowchart illustrating a method for transmitting a PTRS according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart of a PTRS extraction method according to an embodiment of the present invention;

FIG. 3 is a signaling interaction diagram of an exemplary application scenario in accordance with an embodiment of the present invention;

FIG. 4 is a signaling interaction diagram of another exemplary application scenario in accordance with an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a PTRS transmitting apparatus according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an extracting apparatus of a PTRS according to an embodiment of the present invention.

Detailed Description

Those skilled in the art understand that, as background, the cell level single carrier PTRS design approach requires further research.

In the prior art, the frequency domain position of a single carrier Physical Downlink Shared Channel (PDSCH) is mapped in units of Physical Resource Blocks (PRB). The downlink waveform is a DFT-s-OFDM waveform, and PDSCHs of multiple users need to be concatenated first, and then DFT conversion is performed on the basis of each OFDM symbol, and the downlink waveform is mapped to the whole frequency domain bandwidth. When a receiving terminal demodulates a single-carrier PDSCH, it first needs to obtain a PDSCH bandwidth, and after Inverse Discrete Fourier Transform (IDFT), determines a resource location of a PDSCH signal of the user itself to demodulate the PDSCH.

Note that, when multiplexing data signals of a plurality of users in one symbol, the transmitting terminal performs DFT conversion on PDSCH of the plurality of users after concatenation, and similarly, the receiving terminal performs IDFT conversion on PDSCH signals of the plurality of users before separation. Each user demodulates only its own data signal.

When the downlink adopts a single carrier PDSCH waveform, the waveform of the PTRS should also be a cell-level single carrier waveform.

In 3GPP protocol Release15 (Release15, R15 for short), a PTRS configuration scheme includes uplink PTRS configuration and downlink PTRS configuration. Currently, uplink PTRS can be classified into single-carrier PTRS with transform precoding enabled (denoted by parameter transform precoding enable) and multi-carrier PTRS with transform precoding disabled (denoted by parameter transform precoding disable).

Specifically, whether the uplink PTRS exists or not is indicated by an Information Element (IE) of RRC signaling to demodulate a reference signal uplink configuration parameter DMRS-UplinkConfig. If the parameter DMRS-UplinkConfig is configured such that PTRS is not present, it means that PTRS is not present.

Wherein, the single carrier PTRS configures two parameters: sample density, expressed as parameter sampleDensity; and time-domain density transform precoding, represented by the parameter timeDensityTransformProrecording. The sample density parameter is provided with 5 values, and the value range of each value is1 to 276. The 5 configured values correspond to the scheduling bandwidths shown in table 1. Referring to table 1, the scheduling bandwidth is a bandwidth N_RB0Bandwidth N_RB1Bandwidth N_RB2Bandwidth N_RB3Sum bandwidth N_RB4. According to the bandwidth allocated by the UE, the uplink PTRS configuration of the bandwidth may be determined.

Furthermore, the current protocol provides that if the time domain density of PTRS is configured (e.g., as represented by parameter d 2), then the time domain density representing single carrier PTRS is 2, otherwise, the default time domain density is 1.

TABLE 1

Scheduling bandwidth	Number of PTRS groups	Number of samples contained per PTRS group
			N_RB0≤N_RB<N _RB1	2	2
N_RB1≤N_RB<N _RB2	2	4
			N_RB2≤N_RB<N _RB3	4	2
N_RB3≤N_RB<N _RB4	4	4
			N_RB4≤N_RB	8	4

In the current protocol, the downlink PTRS adopts multi-carrier configuration, and whether the downlink PTRS is configured in a demodulation reference signal downlink configuration parameter DMRS-downlink config of an RRC signaling information element or not is determined. If the information element indicates that a PTRS does not exist, it means that a downlink PTRS does not exist.

The downlink PTRS is mainly configured with 4 parameters: frequency density (frequency density), time domain density, power coefficient (error-ratio), and resource element offset (resource element offset). The frequency density parameter may be configured with two values, the value range is 1 to 276, and the corresponding scheduling bandwidth is shown in table 2. Referring to table 2, the scheduling bandwidths are a bandwidth NRB0 and a bandwidth NRB1, and the downlink PTRS configuration of the bandwidth may be determined according to the bandwidth allocated by the UE.

TABLE 2

Scheduling bandwidth	Frequency density
		N_RB<N_RB0	Absence of PTRS
N_RB0≤N_RB<N_RB1	2
		N_RB1≤N _RB	4

In downlink PTRS configuration, the time domain density is configured by 3 values (PTRS-MCS)₁，ptrs-MCS₂，ptrs-MCS₃) The value range is 0 to 29, ptrs-MCS₄It is not configured separately, and the default value is 28 or 29, depending on the table used by Modulation and Coding Scheme (MCS).

TABLE 3

Scheduling MCS	Frequency density
		I_MCS<ptrs-MCS₁	Absence of PTRS
ptrs-MCS₁≤I_MCS<ptrs-MCS ₂	4
		ptrs-MCS₂≤I_MCS<ptrs-MCS ₃	2
ptrs-MCS₃≤I_MCS<ptrs-MCS₄	1

Further, the power coefficient can only be configured with 1 value, and the value range is 0 to 3.

In practical applications, if the network is not configured with the time domain density and the frequency domain density, the time domain density takes 1 by default, and the frequency domain density takes 2 by default. The resource unit offset may be configured with 3 values, and the UE may select 1 from the 3 configured values to prevent interference between different users. If not configured, the resource unit offset default is "00", and the specific configuration parameters can be referred to 3GPP protocol TS 38.331.

The embodiment of the invention provides a PTRS sending method, which comprises the following steps: determining indication information, wherein the indication information is at least used for indicating whether a cell level single carrier PTRS exists; and configuring the indication information in broadcast information and sending out the indication information. Aiming at the downlink cell-level PTRS of the single carrier, the embodiment of the invention provides a feasible scheme for sending the cell-level single carrier PTRS by the broadcast information carrying the indication information of whether the cell-level single carrier PTRS exists.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Fig. 1 is a flowchart illustrating a method for transmitting a PTRS according to an embodiment of the present invention. The PTRS transmission method may be performed by a terminal side, for example, by an NR UE. The transmission method of the PTRS may include the steps of:

step S101, determining indication information, wherein the indication information is at least used for indicating whether a cell level single carrier PTRS exists;

step S102, the indication information is configured in the broadcast information and sent out.

Specifically, in step S101, the network side base station may determine whether to configure a cell level single carrier PTRS. If the cell-level single carrier PTRS is configured, the base station can determine indication information, and the indication information can be at least used for indicating whether the cell-level single carrier PTRS exists.

In a non-limiting example, the broadcast Information may include a Master Information Block (MIB) and a System Information Block (SIB).

In one non-limiting example, the indication information may be represented using 1 bit in the broadcast information to indicate whether the cell-level single carrier PTRS is present. For example, bit 1 may be used to indicate that the cell level single carrier PTRS exists, and bit 0 may be used to indicate that the cell level single carrier PTRS does not exist. Alternatively, bit 0 may be used to indicate that the cell-level single carrier PTRS exists, and bit 1 may be used to indicate that the cell-level single carrier PTRS does not exist. The 1 bit may be a reserved bit existing in the broadcast information, or may be additionally added.

In another non-limiting example, in addition to indicating whether the cell-level single-carrier PTRS exists in the broadcast information, the time domain density of the cell-level single-carrier PTRS may be indicated in the broadcast information, for example, the time domain density of the cell-level single-carrier PTRS is included in the indication information.

In particular implementations, the time domain density may occupy

A bit, said time domain density being selected by the base station from a set of predetermined time domain densities comprising F elements, wherein F is a positive integer,

meaning rounding up.

For example, assuming that a set of predetermined time domain densities is included in the set {2,4}, the time domain density may be indicated using 1 bit. In a specific implementation, bit 1 may be used to represent that the time domain density is 2, and bit 0 may be used to represent that the time domain density is 4; bit 1 may be used to indicate a time domain density of 4 and bit 0 may be used to indicate a time domain density of 2. It should be noted that, at this time, the base station needs to use 1 bit to indicate whether the cell level single carrier PTRS exists, and when the cell level single carrier PTRS exists, the bit information corresponding to the time domain density is valid.

Optionally, the F elements may include element 0, and the element 0 may be used to indicate that the cell-level single carrier PTRS is not present; while other non-zero elements may be used to indicate the presence of the cell-level single carrier PTRS. For example, assuming that a predetermined time domain density set is included in the set {0,2,4}, 2 bits may be used to indicate whether the cell level single carrier PTRS exists, and the time domain density may be indicated together when the cell level single carrier PTRS exists. At this time, the base station is not required to separately configure bit information to indicate whether the cell-level single carrier PTRS exists.

In a specific implementation, bit 00 may be used to represent element 0, which indicates that the cell-level single carrier PTRS does not exist, and other bit values indicate that the cell-level single carrier PTRS exists; further, bit 01 may be used to represent a time domain density of 2, and bit 0 may be used to represent a time domain density of 4; bit 10 may also be used to indicate a time domain density of 4, bit 0 may be used to indicate a time domain density of 2, and bit 11 may be reserved bits. Those skilled in the art will understand that more embodiments may be changed to represent the preset temporal density set and/or the temporal density, and the description is omitted here.

In another non-limiting example, the indication information may include a total number of samples of the cell-level single-carrier PTRS and a number of PTRS included in each packet of the cell-level single-carrier PTRS, in addition to indicating whether the cell-level single-carrier PTRS exists and a time-domain density of the PTRS in the broadcast information.

In one embodiment, assuming that the set of predetermined total numbers of samples includes N elements, the set of predetermined numbers of PTRS may include M elements. The base station may select one element from N elements of the preset total sample number set as the total sample number of the cell-level single carrier PTRS, and select one element from M elements of the preset PTRS number set as the PTRS number. The total number of samples may occupy

One bit. The PTRS number occupation

Each of the bits, M, N, is a positive integer,

meaning rounding up.

Further, all elements of the preset sample total number set may be non-zero elements. And when the base station determines the time domain density, selecting non-zero time domain density to indicate that the cell level single carrier PTRS exists. Then, the base station may select a non-zero element from the preset total sample number set as the total sample number of the PTRS; further, an element may be selected from the set of predetermined number of PTRS as the number of PTRS included in each group. At this time, if the cell level single carrier PTRS does not exist, the indication information may explicitly indicate that the PTRS does not exist through a specific bit, or the time domain density of 0 indicates that the cell level single carrier PTRS does not exist.

Alternatively, the preset sample total number set may contain an element 0. And when the base station determines the time domain density, selecting a non-zero time domain density value to indicate that the cell-level single carrier PTRS exists. Thereafter, the base station may select one element from the preset total number of samples set as the total number of samples of the PTRS. If the selected element is 0, the cell level single carrier PTRS does not exist, and at the moment, a special bit does not need to be adopted to indicate whether the cell level single carrier PTRS exists or not; if the selected element is not 0, the cell level single carrier PTRS exists, and the element is used for representing the total number of samples of the PTRS. Further, an element may be selected from the set of predetermined number of PTRS as the number of PTRS included in each group. Note that each PTRS is sample-continuous.

For example, the indication information indicates that the total number of samples is 144, and if the number set of PTRS selected by the base station is 2, under this condition, it may be determined that the PTRS are divided into 72 groups, 144 PTRS samples, and two PTRS samples are taken as a group and are uniformly distributed in the data samples.

In another non-limiting example, the indication information may include a total number of samples of the cell-level single-carrier PTRS and a number of packets of the cell-level single-carrier PTRS, in addition to indicating whether the cell-level single-carrier PTRS is present and a time-domain density of the PTRS in the broadcast information.

In one embodiment, assuming that the predetermined total sample number set includes N elements, the predetermined grouping number set may include M elements. The base station may select one element from the N elements of the preset total sample number set as the total sample number of the cell-level single carrier PTRS, and select one element from the M elements of the preset grouping number set as the grouping number. The total number of samples may occupy

And (4) a bit. The number of packets occupied

The individual bits, M, N, are all positive integers,

meaning rounding up.

Further, all elements of the preset sample total number set may be non-zero elements. When the base station determines the time domain density, a non-zero time domain density value can be selected by the base station to indicate that the cell-level single carrier PTRS exists. Thereafter, the base station may select a non-zero element from the preset total number of samples set as the total number of samples of the PTRS. Further, an element may be selected from the preset grouping number set as the grouping number. At this time, if the cell level single carrier PTRS does not exist, the indication information may explicitly indicate that a PTRS does not exist through a specific bit, or configure the time domain density to be 0 to indicate that the cell level single carrier PTRS does not exist.

Alternatively, the preset sample total number set includes element 0. When the total number of the samples is 0, the cell level single carrier PTRS does not exist, and at the moment, a special bit does not need to be adopted to indicate whether the cell level single carrier PTRS exists or not. Specifically, after determining the time domain density, the base station may select one element from the preset total sample number set as the total sample number of the PTRS. If the selected element is 0, the cell level single carrier PTRS does not exist; if the selected element is not 0, then the total number of samples of the PTRS is represented. Further, an element may be selected from the preset grouping number set as the grouping number.

For example, the indication information indicates that the total number of samples is 144, and if the number of packets selected by the base station is 72, under this condition, it may be determined that the sample density is 2, that is, 144 PTRS samples are divided into 72 groups and uniformly distributed in the data samples.

In another non-limiting example, in addition to indicating whether the cell-level single-carrier PTRS is present and the time-domain density of the PTRS in the broadcast information, the sample density of the cell-level single-carrier PTRS and the number of PTRS contained in each packet of the cell-level single-carrier PTRS may be indicated.

For example, assuming that the preset sample density set of the cell-level single-carrier PTRS includes K elements, and the sample density set does not include an element whose element is 0, the preset PTRS number set includes L elements. The indication information may be respectively adopted

A bit sum

One bit to represent the sample density and the number of PTRSs. Wherein,

indicating rounding on X. If the cell-level single-carrier PTRS does not exist, the base station can set the time domain density of the cell-level single-carrier PTRS in the indication information to be 0; alternatively, the base station may use 1 bit to explicitly indicate whether a cell level single carrier PTRS exists.

For another example, the preset sample density set of the cell-level single-carrier PTRS includes K elements, the sample density set includes a value of 0, and the preset PTRS number set includes L elements. The indication information may be respectively adopted

A bit sum

One bit to represent the sample density and the number of PTRSs. Wherein,

indicating rounding on X. And when the value indicated by the sample density domain where the sample density is located is 0, the cell level single carrier PTRS does not exist, and at the moment, a special bit does not need to be adopted to indicate whether the cell level single carrier PTRS exists or not.

In another non-limiting example, the base station carries indication information in broadcast information, where the indication information may include a time domain density of the cell-level single carrier PTRS, and may indicate explicitly or implicitly whether the cell-level single carrier PTRS is present. Further, the base station may also carry, in RRC signaling, the total number of samples of the cell level single carrier PTRS and the number of PTRS included in each packet of the cell level single carrier PTRS. For example, the total number of samples of the cell-level single-carrier PTRS and the number of PTRS included in each packet of the cell-level single-carrier PTRS may be configured in an RRC information element.

In a specific implementation, the total number of samples of the cell-level single carrier PTRS may occupy

A total number of samples selected by the base station from a preset total number of samples set containing N elements, wherein the PTRS number can occupy

A number of bits, the number of PTRSs being selected by the base station from a preset set of PTRS numbers comprising M elements, M, N all being positive integers,

get integer on representation. Optionally, the preset total sample number set may include an element 0, and the total sample number of 0 indicates that the cell-level single carrier PTRS does not exist.

In another non-limiting example, the base station carries indication information in broadcast information, where the indication information may include a time domain density of the cell-level single carrier PTRS, and may indicate explicitly or implicitly whether the cell-level single carrier PTRS is present. Further, the base station may also carry the total number of samples of the cell-level single carrier PTRS and the number of packets of the cell-level single carrier PTRS in RRC signaling.

A total number of samples selected by the base station from a preset total number of samples set containing N elements, wherein the number of packets can occupy

A number of bits, which may be selected by the base station from a predetermined set of numbers of packets containing Q elements, N, Q are all positive integers,

meaning rounding up. Optionally, the preset total number of samples set may include element 0, and the total number of samples being 0 indicates that the cell-level single carrier PTRS is not present.

In another non-limiting example, the base station carries indication information in broadcast information, where the indication information may include a time domain density of the cell-level single carrier PTRS, and may indicate explicitly or implicitly whether the cell-level single carrier PTRS is present. Further, the base station may also carry, in RRC signaling, the sample density of the cell-level single-carrier PTRS and the number of PTRS included in each packet of the cell-level single-carrier PTRS.

In an implementation, the sample density of the cell-level single carrier PTRS may occupy

A number of bits, the sample density can be selected by the base station from a preset sample density set containing K elements, and the number of PTRSs can occupy

A number of bits, the number of PTRSs being selected by the base station from a preset set of PTRS numbers comprising L elements, K, L all being positive integers,

meaning rounding up. Optionally, the preset sample density set may include element 0, and a sample density of 0 indicates that the cell-level single carrier PTRS is not present.

It should be noted that, in an implementation, the RRC information element may be a PDSCH-configuration common information element (PDSCH-configuration common information element), and the information element may be used to configure cell level parameters.

The details are explained below with specific examples.

Detailed description of the preferred embodiment 1

In the broadcast information, the total number of PTRS samples and a packet granularity (chunk _ size, i.e., the number of PTRS contained in each packet) value are configured. Assume that the set of total number of PTRS samples is 0,4,8,16,32,64,128, 256. Any of which may be indicated with 3 bits. For example, bit 000 represents a 0, bit 001 represents a 4, bit 010 represents an 8, bit 011 represents a 16, bit 100 represents a 32, bit 101 represents a 64, bit 110 represents a 128, and bit 111 represents a 256. The number of PTRS is reconfigured, assuming that the set of PTRS numbers is 2,4, and each element requires a 1-bit indication, e.g., bit 0 represents 2 and bit 1 represents 4. In a non-limiting example, the 3 bits corresponding to the PTRS samples are 110, and the 1 bit corresponding to the number of PTRS samples is 0, under which condition, 128 PTRS samples, each two PTRS samples, may be grouped and uniformly distributed in the time domain samples.

If the configured PTRS sample total number is 0, the cell level single carrier PTRS does not exist, and at the moment, a separate bit is not needed to indicate whether the cell level single carrier PTRS exists or not.

Specific example 2

In the broadcast information, PTRS sample density is configured. Assume that the PTRS sample density set is 0,12,24,36, where any element may be indicated with 2 bits. For example, bit 00 represents a 0, bit 01 represents 12, bit 10 represents 24, and bit 36 represents 11. The number of PTRS is reconfigured, assuming that the set of PTRS numbers is 2,4, requiring a 1-bit indication per element. For example, bit 0 represents 2 and bit 1 represents 4. In one non-limiting example, the PTRS sample density corresponds to a bit of 01, and the number of PTRS samples corresponds to a bit of 0, under which condition there are 2 consecutive PTRS samples every 12 time-domain samples.

And if the configured PTRS density is 0, indicating that the cell-level single carrier PTRS does not exist. At this time, no separate bit is required to indicate whether the cell-level single carrier PTRS exists.

Specific example 3

In broadcast information, the indication information indicates the presence of the cell-level single carrier PTRS. Under this condition, the total number of PTRS samples and the number of PTRS contained in each packet may be configured in the RRC IE parameter PDSCH-ConfigCommon. Assume that the set of total number of PTRS samples is 0,4,8,16,32,64,128, 256. Any of which may be indicated with 3 bits. For example, bit 000 represents a 0, bit 001 represents a 4, bit 010 represents an 8, bit 011 represents a 16, bit 100 represents a 32, bit 101 represents a 64, bit 110 represents a 128, and bit 111 represents a 256. The number of PTRS is reconfigured, assuming that the set of PTRS numbers is 2,4, requiring a 1-bit indication per element. For example, bit 0 represents 2 and bit 1 represents 4. In a non-limiting example, the 3 bits corresponding to the PTRS samples are 110, and the 1 bit corresponding to the number of PTRS samples is 0, under which condition, 128 PTRS samples, each two PTRS samples, may be grouped and uniformly distributed in the time domain samples.

Specific example 4

In broadcast information, the indication information indicates the presence of the cell-level single carrier PTRS. Under this condition, the PTRS sample density may be configured in the RRC IE parameter PDSCH-ConfigCommon. Assume that the PTRS sample density set is 0,12,24,36, where any element may be indicated with 2 bits. For example, bit 00 represents a 0, bit 01 represents 12, bit 10 represents 24, and bit 36 represents 11. The number of PTRS is reconfigured, assuming that the set of PTRS numbers is 2,4, requiring a 1-bit indication per element. For example, bit 0 represents 2 and bit 1 represents 4. In one non-limiting example, the PTRS sample density corresponds to a bit of 01, and the number of PTRS samples corresponds to a bit of 1 of 0, under which condition there are 2 consecutive PTRS samples per 12 time-domain samples.

Fig. 2 is a flowchart illustrating a method for extracting a PTRS signal according to an embodiment of the present invention. The extraction method may be used on the user side, e.g. performed by NR UEs. Specifically, the extraction method may include the steps of:

step S201, receiving broadcast information, wherein the broadcast information comprises indication information, and the indication information is at least used for indicating whether a cell level single carrier PTRS exists;

step S202, extracting the indication information.

More specifically, in step S201, the UE may receive broadcast information. The broadcast information includes at least indication information for indicating whether there is a cell level single carrier PTRS. The broadcast information may be a master information block or a system information block.

In step S202, the UE may extract the indication information.

In a specific implementation, the indication information may include a time domain density of the cell-level single carrier PTRS. The time domain density may occupy

meaning rounding up. Optionally, the F elements include element 0, where element 0 indicates that the cell-level single carrier PTRS is not present;

further, the indication information may further include a total number of samples of the cell-level single-carrier PTRS and a number of PTRS included in each group of the cell-level single-carrier PTRS.

In a specific implementation, the total number of samples of the cell-level single carrier PTRS occupies

the representation is rounded up.

As a variation, the indication information may further include a total number of samples of the cell level single carrier PTRS and a number of packets of the cell level single carrier PTRS.

A number of bits, the total number of samples being selected from a preset set of total numbers of samples comprising N elements, the number of packets occupying

A number of bits selected from a predetermined set of numbers of groupings of Q elements, N, Q all being positiveThe number of the whole numbers is an integer,

the representation is rounded up. Optionally, the N elements may include element 0, where element 0 indicates that the cell-level single carrier PTRS is not present.

As another variation, the indication information further includes a time domain density of the cell-level single-carrier PTRS and a number of PTRS included in each packet of the cell-level single-carrier PTRS.

In an implementation, the sample density occupancy of the cell-level single carrier PTRS

A number of bits, the sample density selected from a preset set of sample densities comprising K elements, the number of PTRSs occupying

meaning rounding up. Optionally, the K elements include element 0, and the element 0 indicates that the cell-level single carrier PTRS does not exist.

In another variation, the base station may configure the total number of samples of the cell-level single-carrier PTRS and the number of PTRS included in each group of the cell-level single-carrier PTRS in an RRC information unit, and accordingly, the UE may extract the total number of samples of the cell-level single-carrier PTRS and the number of PTRS included in each group of the cell-level single-carrier PTRS in the RRC information unit.

meaning rounding up.

In another variation, the base station may configure the total number of samples of the cell-level single-carrier PTRS and the number of packets of the cell-level single-carrier PTRS in an RRC information unit, and accordingly, the UE may extract the total number of samples of the cell-level single-carrier PTRS and the number of packets of the cell-level single-carrier PTRS in the RRC information unit.

A number of bits selected from a set of predetermined numbers of groupings comprising Q elements, N, Q all being positive integers,

In another variation, the base station may configure the sample density of the cell-level single-carrier PTRS and the number of PTRS included in each group of the cell-level single-carrier PTRS in an RRC information unit, and accordingly, the UE may extract the sample density of the cell-level single-carrier PTRS and the number of PTRS included in each group of the cell-level single-carrier PTRS in the RRC information unit.

In a specific implementation, the RRC information element may be a PDSCH-configuration generic information element.

Those skilled in the art understand that the steps S201 to S202 can be regarded as execution steps corresponding to the steps S101 to S102 described in the above embodiment shown in fig. 1, and the two steps are complementary in specific implementation principle and logic. Therefore, for the method for extracting the PTRS on the UE side, reference may be made to the related description of the embodiment shown in fig. 1, which is not repeated here.

The signaling interaction between the user equipment and the base station (e.g., NR base station) employing the embodiments of the present invention is further described below with reference to a typical application scenario.

Fig. 3 is a signaling interaction diagram of an exemplary application scenario according to an embodiment of the present invention. Wherein, the user equipment 1 and the base station 2 may respectively adopt the technical solutions of the methods shown in fig. 1 and fig. 2.

In a typical application scenario, referring to fig. 3, the base station 2 first performs operation s1, that is, determines to configure indication information in the broadcast information, where the indication information can be used to indicate at least whether there is a cell-level single-carrier PTRS. The broadcast information is a main information block or an auxiliary information block. Further, the indication information may include a time domain density of the cell-level single carrier PTRS. The time domain density occupation

meaning rounding up. Optionally, the F elements include an element 0, where the element 0 indicates that the cell level single carrier PTRS does not exist.

As a variation, the indication information may further include a total number of samples of the cell-level single-carrier PTRS and a number of PTRS included in each packet of the cell-level single-carrier PTRS. In a particular implementation, a total number of samples of the cell-level single carrier PTRS occupies

A number of bits, selected from a set of predetermined numbers of PTRS comprising M elements, M, N are all positive integers,

meaning rounding up.

Alternatively, the indication information may further include a total number of samples of the cell-level single carrier PTRS and a number of packets of the cell-level single carrier PTRS. In a specific implementation, the total number of samples of the cell-level single carrier PTRS occupies

A number of bits, the total number of samples being selected from a preset total number of samples set comprising N elements, the number of packets occupying

Bits, selected from a set of predetermined grouping numbers comprising Q elements, N, Q are all positive integers,

meaning rounding up. Optionally, the N elements may include element 0, where element 0 indicates that the cell-level single carrier PTRS is not present.

Still alternatively, the indication information may further include a sample density of the cell-level single-carrier PTRS and a number of PTRS included in each packet of the cell-level single-carrier PTRS. In an implementation, the sample density occupancy of the cell-level single carrier PTRS

A number of bits, selected from a set of predetermined numbers of PTRS comprising L elements, K, L are all positive integers,

meaning rounding up. Optionally, the K elements include element 0, and the element 0 indicates that the cell level single carrier PTRS does not exist.

Second, the base station 2 may perform operation s2, i.e., issue the broadcast information.

Again, the user equipment 1 may perform operation s3 to receive and extract the indication information in the broadcast information.

For more contents of the signaling interaction process of the PTRS, the working principle and the working mode of the user equipment 1 and the base station 2 shown in fig. 3, reference may be made to the related descriptions in fig. 1 and fig. 2, and details are not repeated here.

Fig. 4 is a signaling interaction diagram of another exemplary application scenario according to an embodiment of the present invention. Wherein, the user equipment 1 and the base station 2 may respectively adopt the technical solutions of the methods shown in fig. 1 and fig. 2.

In yet another exemplary application scenario, referring to fig. 4, the base station 2 first performs operation s1, i.e. determines to configure indication information in the broadcast information,the indication information may be used at least to indicate whether there is a cell level single carrier PTRS. The broadcast information is a main information block or an auxiliary information block. Further, the indication information may include a time domain density of the cell-level single carrier PTRS. The time domain density occupation

meaning rounding up. Optionally, the F elements include element 0, and the element 0 indicates that the cell-level single carrier PTRS does not exist.

Secondly, the base station 2 may perform operation s2, i.e. issue the broadcast information, and accordingly, the user equipment 1 may receive and extract the indication information in the broadcast information.

Again, if the indication information indicates that the cell-level single-carrier PTRS exists, the base station 2 may perform operation s3, that is, the base station 2 may configure the total number of samples of the cell-level single-carrier PTRS and the number of PTRS included in each packet of the cell-level single-carrier PTRS in an RRC information element, and transmit the RRC information element. The RRC IE includes a parameter PDSCH configuration common information element. In a specific implementation, the total number of samples of the cell-level single carrier PTRS occupies

meaning rounding up.

Or, the base station2, the total number of samples of the cell-level single carrier PTRS and the number of packets of the cell-level single carrier PTRS may be configured in an RRC information element, and the RRC information element may be issued. In a specific implementation, the total number of samples of the cell-level single carrier PTRS occupies

Alternatively, the base station 2 may configure the sample density of the cell level single carrier PTRS and the number of PTRS included in each packet of the cell level single carrier PTRS in an RRC information element, and issue the RRC information element. In an implementation, the sample density occupancy of the cell-level single carrier PTRS

Further, the user equipment 1 may perform operation s4, namely, receive the RRC information element to obtain the parameter PDSCH configuration common information element in the RRC information element.

For more contents of the signaling interaction process of the PTRS, the working principle and the working mode of the user equipment 1 and the base station 2 shown in fig. 4, reference may be made to the related descriptions in fig. 1 and fig. 2, and details are not repeated here.

Thus, by the technical scheme provided by the embodiment of the invention, a cell-level PTRS configuration scheme is provided for a cell-level single carrier PTRS. Moreover, when the PTRS is configured, the mode of configuring the threshold value is not adopted, but the total number of PTRS samples or the sample density is adopted, so that the overhead of high-level signaling can be saved, and the PTRS in the time domain sample of each UE can be ensured.

Fig. 5 is a schematic structural diagram of a PTRS transmitting apparatus according to an embodiment of the present invention. The PTRS transmitting apparatus may be implemented by a base station, for example, an NR base station, and implement the method solutions shown in fig. 1, fig. 3 and fig. 4.

In a specific implementation, the PTRS transmitting device includes: a determining module 51, configured to determine indication information, where the indication information is at least used to indicate whether a cell level single carrier PTRS exists; and a sending module 52, configured to configure the indication information in the broadcast information and send out the indication information.

In a specific implementation, the indication information may include a time domain density of the cell-level single carrier PTRS.

In a specific implementation, the time domain density occupation

the representation is rounded up.

In one non-limiting example, the F elements include element 0, and the element 0 indicates that the cell-level single carrier PTRS is not present.

In a specific implementation, the apparatus for transmitting a PTRS may further include: a first configuration module (not shown) configured to configure, in an RRC information element, the total number of samples of the cell-level single-carrier PTRS and the number of PTRS included in each group of the cell-level single-carrier PTRS.

In a specific implementation, the apparatus for transmitting a PTRS may further include: a second configuring module (not shown) configured to configure the total number of samples of the cell level single carrier PTRS and the number of packets of the cell level single carrier PTRS in an RRC information element.

In a specific implementation, the apparatus for transmitting the PTRS may further include a third configuring module (not shown), configured to configure, in an RRC information unit, the sample density of the cell-level single-carrier PTRS and the number of PTRS included in each group of the cell-level single-carrier PTRS.

In a specific implementation, the indication information may further include a total number of samples of the cell-level single-carrier PTRS and a number of PTRS included in each packet of the cell-level single-carrier PTRS.

In a particular implementation, a total number of samples of the cell-level single carrier PTRS occupies

meaning rounding up.

In one non-limiting example, the N elements include element 0, and the element 0 indicates that the cell-level single carrier PTRS is not present.

In a specific implementation, the indication information further includes a total number of samples of the cell-level single carrier PTRS and a number of packets of the cell-level single carrier PTRS.

meaning rounding up.

In a specific implementation, the P elements include element 0, and the element 0 indicates that the cell-level single carrier PTRS is not present.

In a specific implementation, the indication information further includes a sample density of the cell-level single-carrier PTRS and a number of PTRS included in each group of the cell-level single-carrier PTRS.

meaning rounding up.

In one non-limiting example, the K elements include element 0, where element 0 indicates that the cell level single carrier PTRS is not present.

In a specific implementation, the RRC information element is a PDSCH-configuration common information element.

In a specific implementation, the broadcast information is a main information block or an auxiliary information block.

For more details of the operation principle and operation mode of the PTRS transmitting device shown in fig. 5, reference may be made to the description in fig. 1, fig. 3 and fig. 4, and further description is omitted here.

Fig. 6 is a schematic structural diagram of an extracting apparatus of a PTRS according to an embodiment of the present invention. The PTRS extraction device may be executed by a base station, for example, NR UE, and implement the method solutions shown in fig. 2, fig. 3 and fig. 4.

In a specific implementation, the PTRS extracting device may include: a receiving module 61, configured to receive broadcast information, where the broadcast information includes indication information, and the indication information is at least used to indicate whether a cell level single carrier PTRS exists; and an extracting module 62, configured to extract the indication information.

In a specific implementation, the indication information includes a time domain density of the cell-level single carrier PTRS.

In particular implementations, the time domain density occupancy

meaning rounding up.

In a specific implementation, the F elements include 0, where the element 0 indicates that the cell-level single carrier PTRS is not present.

In a specific implementation, the apparatus for extracting PTRS may further include: a first extracting module (not shown) configured to extract a total number of samples of the cell-level single-carrier PTRS in the RRC information element and a number of PTRS included in each packet of the cell-level single-carrier PTRS.

In a specific implementation, the PTRS extracting apparatus may further include: a second extracting module (not shown) for extracting a total number of samples of the cell-level single carrier PTRS and a number of packets of the cell-level single carrier PTRS in the RRC information unit.

In a specific implementation, the apparatus for extracting PTRS may further include: a third extracting module (not shown) for extracting the sample density of the cell-level single-carrier PTRS in the RRC information unit and the number of PTRS included in each group of the cell-level single-carrier PTRS.

In a specific implementation, the indication information further includes a total number of samples of the cell-level single-carrier PTRS and a number of PTRS included in each group of the cell-level single-carrier PTRS.

meaning rounding up.

A number of bits, the total number of samples being selected from a preset total number of samples set containing P elements, the number of packets occupying

meaning rounding up.

In one non-limiting example, the P elements include element 0, and the element 0 indicates that the cell-level single carrier PTRS is not present.

In a specific implementation, the indication information may further include a time domain density of the cell-level single-carrier PTRS and a number of PTRS included in each packet of the cell-level single-carrier PTRS.

meaning rounding up.

In one non-limiting example, the K elements include element 0, and the element 0 indicates that the cell-level single carrier PTRS is not present.

In a specific implementation, the RRC information element configures a general information element for the PDSCH.

In a specific implementation, the broadcast information may be a master information block or a system information block.

For more contents of the operation principle and the operation manner of the PTRS extraction device shown in fig. 6, reference may be made to the related descriptions in fig. 2, fig. 3, and fig. 4, and details are not repeated here.

Further, an embodiment of the present invention further discloses a storage medium, on which a computer instruction is stored, and when the computer instruction runs, the technical solution of the method in the embodiment shown in fig. 1 to fig. 4 is executed. Preferably, the storage medium may include a computer-readable storage medium such as a non-volatile (non-volatile) memory or a non-transitory (non-transient) memory. The computer readable storage medium may include ROM, RAM, magnetic or optical disks, and the like.

Further, an embodiment of the present invention further discloses a base station, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the computer instructions to execute the technical solutions of the methods in the embodiments shown in fig. 1, fig. 3, and fig. 4. Specifically, the base station may be an NR base station.

Further, an embodiment of the present invention further discloses a terminal, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the technical solutions of the methods in the embodiments shown in fig. 2, fig. 3, and fig. 4 when executing the computer instructions. Preferably, the base station may interact with the user equipment, and specifically, the terminal may be a user equipment, such as a 5G NR UE.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for transmitting a PTRS, comprising:

determining indication information, wherein the indication information is at least used for indicating whether cell level single carrier PTRS exists or not;

and configuring the indication information in broadcast information and sending out the indication information.

2. The transmission method of claim 1, wherein the indication information comprises a time domain density of the cell-level single carrier PTRS.

3. The transmission method of claim 2, wherein the time-domain density occupancy

meaning rounding up.

4. The transmission method of claim 3, wherein the F elements comprise element 0, and wherein the element 0 indicates that the cell-level single-carrier PTRS is not present.

5. The transmission method of claim 2, further comprising:

and configuring the total number of samples of the cell level single-carrier PTRS and the number of PTRSs contained in each group of the cell level single-carrier PTRS in an RRC information unit.

6. The transmission method of claim 2, further comprising:

and configuring the total number of samples of the cell-level single carrier PTRS and the number of groups of the cell-level single carrier PTRS in an RRC information unit.

7. The transmission method of claim 2, further comprising:

and configuring the sample density of the cell-level single-carrier PTRS and the number of PTRSs contained in each group of the cell-level single-carrier PTRS in an RRC information unit.

8. The transmission method according to claim 2, wherein the indication information further includes a total number of samples of the cell-level single-carrier PTRS and a number of PTRS included in each packet of the cell-level single-carrier PTRS.

9. The transmitting method according to claim 5 or 8, wherein the total number of samples of the cell-level single-carrier PTRS occupies

meaning rounding up.

10. The transmission method of claim 9, wherein the N elements comprise element 0, and wherein element 0 indicates that the cell-level single-carrier PTRS is not present.

11. The transmission method of claim 2, wherein the indication information further comprises a total number of samples of the cell-level single-carrier PTRS and a number of packets of the cell-level single-carrier PTRS.

12. The transmission method according to claim 6 or 11, wherein the total number of samples of the cell-level single-carrier PTRS occupies

meaning rounding up.

13. The transmission method of claim 12, wherein the P elements comprise element 0, and wherein element 0 indicates that the cell-level single-carrier PTRS is not present.

14. The transmission method according to claim 2, wherein the indication information further includes a sample density of the cell-level single-carrier PTRS and a number of PTRS included in each packet of the cell-level single-carrier PTRS.

15. The transmitting method according to claim 7 or 14, wherein the sample density occupancy of the cell level single carrier PTRS

meaning rounding up.

16. The transmission method of claim 15, wherein the K elements comprise element 0, and wherein element 0 indicates that the cell-level single carrier PTRS is not present.

17. The transmission method according to any of claims 5 to 7, wherein the RRC information element configures a common information element for the PDSCH.

18. The transmission method of claim 1, wherein the broadcast information is a primary information block or a secondary information block.

19. A PTRS extraction method, comprising:

receiving broadcast information, wherein the broadcast information comprises indication information, and the indication information is at least used for indicating whether a cell level single carrier PTRS exists;

and extracting the indication information.

20. The extraction method of claim 19, wherein the indication information comprises a time domain density of the cell level single carrier PTRS.

21. The extraction method according to claim 20, wherein the time-domain density occupancy

meaning rounding up.

22. The extraction method according to claim 21, wherein the F elements include element 0, and wherein element 0 indicates that the cell-level single-carrier PTRS is not present.

23. The extraction method according to claim 20, further comprising:

and extracting the total number of samples of the cell-level single-carrier PTRS in an RRC information unit and the number of PTRSs contained in each group of the cell-level single-carrier PTRS.

24. The extraction method according to claim 20, further comprising:

and extracting the total number of samples of the cell-level single carrier PTRS and the number of groups of the cell-level single carrier PTRS in an RRC information unit.

25. The extraction method according to claim 20, further comprising:

and extracting the sample density of the cell level single-carrier PTRS in an RRC information unit and the number of PTRSs contained in each group of the cell level single-carrier PTRS.

26. The extraction method according to claim 20, wherein the indication information further comprises a total number of samples of the cell level single carrier PTRS and a number of PTRSs contained in each packet of the cell level single carrier PTRS.

27. The method according to claim 23 or 26, wherein the total number of samples of the cell-level single-carrier PTRS occupies the total number of samples of the cell-level single-carrier PTRS

A number of PTRS selected from a set of predetermined PTRS numbers including M elements, M, N all being positive integers,

meaning rounding up.

28. The extraction method according to claim 27, wherein the N elements include element 0, and wherein element 0 indicates that the cell-level single-carrier PTRS is not present.

29. The extraction method according to claim 20, wherein the indication information further comprises a total number of samples of the cell-level single-carrier PTRS and a number of packets of the cell-level single-carrier PTRS.

30. The method according to claim 24 or 29, wherein the total number of samples of the cell-level single-carrier PTRS occupies the total number of samples of the cell-level single-carrier PTRS

the representation is rounded up.

31. The method of claim 30, wherein the P elements comprise element 0, and wherein the element 0 indicates that the cell level single carrier PTRS is not present.

32. The extraction method according to claim 20, wherein the indication information further comprises time domain density of the cell level single carrier PTRS and number of PTRS contained in each packet of the cell level single carrier PTRS.

33. The extraction method according to claim 25 or 32, wherein the sample density occupancy of the cell level single carrier PTRS

the representation is rounded up.

34. The extraction method according to claim 33, wherein the K elements include element 0, and wherein the element 0 indicates that the cell level single carrier PTRS is not present.

35. The extraction method according to claim 23, 24 or 25, wherein the RRC information element configures a general information element for the PDSCH.

36. The extraction method according to claim 19, wherein the broadcast information is a master information block or a system information block.

37. A transmission apparatus for a PTRS, comprising:

a determining module, configured to determine indication information, where the indication information is at least used to indicate whether a cell level single carrier PTRS exists;

and the sending module is used for configuring the indication information in the broadcast information and sending the indication information.

38. An apparatus for extracting PTRS, comprising:

a receiving module, configured to receive broadcast information, where the broadcast information includes indication information, and the indication information is at least used to indicate whether a cell level single carrier PTRS exists;

and the extraction module is used for extracting the indication information.

39. A storage medium having stored thereon computer instructions which, when executed, perform any of claims 1 to 18 or perform the steps of the method of any of claims 19 to 36.

40. A base station comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the method of any one of claims 1 to 18.

41. A terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the method of any one of claims 19 to 36.