CN109802777B

CN109802777B - PTRS mapping method and communication equipment

Info

Publication number: CN109802777B
Application number: CN201711138907.4A
Authority: CN
Inventors: 郤伟; 孙晓东; 孙鹏
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2017-11-16
Filing date: 2017-11-16
Publication date: 2020-07-21
Anticipated expiration: 2037-11-16
Also published as: CN109802777A; WO2019095904A1

Abstract

The embodiment of the invention provides a PTRS mapping method and communication equipment, wherein the method comprises the following steps: obtaining a PTRS; the PTRS is processed with the time domain density of 1/d_tMapping to subcarriers on which at least one RE in an OFDM symbol of a micro-slot is locatedWherein the subcarrier is the subcarrier where the DMRS is located, the at least one RE is an RB unoccupied by CORESET, and d_tA step size greater than or equal to 1, and d_tLess than the number of OFDM symbols included in the minislot. The channel estimation performance and the phase noise estimation performance based on the micro-slot transmission can be improved.

Description

PTRS mapping method and communication equipment

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a Phase Tracking Reference Signal (PTRS) mapping method and communication equipment.

Background

Fifth generation (5)^thgeneration, 5G) communication systems employ high frequency band communications to increase link transmission rates. However, in practical applications, the higher the operating frequency, the greater the phase noise. Therefore, for high frequency band transmission, in order to remove phase noise, the transmitting end needs to transmit a reference signal known to the receiving end, i.e. PTRS, according to which the receiving end can estimate the phase noise and then perform corresponding phase compensation. In addition, in order to better support low latency traffic in the 5G communication system, the 5G communication system also supports mini-slot (mini-slot) based transmission, wherein a mini-slot may include one, two, four, or seven Orthogonal Frequency Division Multiplexing (OFDM) symbols. Since the micro-slot is a new introduced technical feature of the 5G communication system, the current transmission method of the PTRS based on the micro-slot is not determined yet, resulting in poor channel estimation performance and phase noise estimation performance of the current transmission based on the micro-slot.

Disclosure of Invention

The embodiment of the invention provides a PTRS (packet transport service) mapping method and communication equipment, which aim to solve the problem of poor channel estimation performance and phase noise estimation performance based on micro-slot transmission.

In order to solve the technical problem, the invention is realized as follows: a method of mapping a PTRS, comprising:

obtaining a PTRS;

the PTRS is processed with the time domain density of 1/d_tMapping to a subcarrier on which at least one Resource Element (RE) in an OFDM symbol of a micro slot is located, wherein the subcarrier is a subcarrier on which a Demodulation Reference Signal (DMRS) is located, and the at least one RE is an RB (Resource block) not occupied by a control Resource set (CORESET), and d_tA step size greater than or equal to 1, and d_tLess than the number of OFDM symbols included in the minislot.

In a first aspect, an embodiment of the present invention further provides a PTRS mapping method, including:

obtaining a PTRS;

the PTRS is processed with the time domain density of 1/d_tMapping to a subcarrier where at least one RE in an OFDM symbol of a micro-slot is located, wherein the subcarrier is a subcarrier where a demodulation reference signal (DMRS) is located, the at least one RE is an RB unoccupied by a CORESET, and d_tA step size greater than or equal to 1, and d_tLess than the number of OFDM symbols included in the minislot.

In a second aspect, an embodiment of the present invention further provides a communication device, including:

the obtaining module is used for obtaining the PTRS;

a mapping module for mapping the PTRS at a time domain density of 1/d_tMapping to a subcarrier where at least one Resource Element (RE) in an OFDM symbol of a micro-slot is located, where the subcarrier is a subcarrier where a demodulation reference signal (DMRS) is located, the at least one RE is an RB not occupied by a control resource set (CORESET), and d_tA step size greater than or equal to 1, and d_tLess than the number of OFDM symbols included in the minislot.

In a third aspect, an embodiment of the present invention further provides a communication device, including: the device comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein when the computer program is executed by the processor, the computer program realizes the steps in the PTRS mapping method provided by the embodiment of the invention.

In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the steps of the mapping method for PTRS provided in the embodiment of the present invention.

Therefore, the embodiment of the invention can improve the channel estimation performance and the phase noise estimation performance based on the micro-slot transmission.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a block diagram of a network system to which an embodiment of the present invention is applicable;

fig. 2 is a flowchart of a method for mapping a PTRS according to an embodiment of the present invention;

FIG. 3 is a flow chart of another PTRS mapping method provided by the embodiment of the invention;

fig. 4 is a schematic diagram of an OFDM symbol extension provided in an embodiment of the present invention;

FIG. 5 is a diagram illustrating symbol mapping positions according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of another symbol mapping position provided by an embodiment of the invention;

fig. 7 is a diagram illustrating another OFDM symbol extension provided by an embodiment of the present invention;

FIG. 8 is a schematic diagram of another symbol mapping position provided by an embodiment of the invention;

fig. 9 is a schematic diagram of another OFDM symbol extension provided by an embodiment of the present invention;

FIG. 10 is a schematic diagram of another symbol mapping position provided by an embodiment of the invention;

fig. 11 is a diagram illustrating another OFDM symbol extension provided by an embodiment of the present invention;

FIG. 12 is a schematic diagram of another symbol mapping position provided by an embodiment of the invention;

fig. 13 is a diagram illustrating another OFDM symbol extension provided by an embodiment of the present invention;

FIG. 14 is a schematic diagram of another symbol mapping position provided by an embodiment of the invention;

fig. 15 is a schematic diagram of another OFDM symbol extension provided by an embodiment of the present invention;

FIG. 16 is a schematic diagram of another symbol mapping position provided by an embodiment of the invention;

fig. 17 is a diagram illustrating another OFDM symbol extension provided by an embodiment of the present invention;

fig. 18 is a diagram illustrating another OFDM symbol extension provided by an embodiment of the present invention;

FIG. 19 is a schematic diagram of another symbol mapping position provided by an embodiment of the invention;

fig. 20 is a diagram illustrating another OFDM symbol extension provided by an embodiment of the present invention;

fig. 21 is a block diagram of a communication device provided by an embodiment of the present invention;

fig. 22 is a block diagram of another communication device provided in an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In the description and in the claims "and/or" means at least one of the connected objects.

Referring to fig. 1, fig. 1 is a structural diagram of a network system to which an embodiment of the present invention is applicable, and as shown in fig. 1, the network system includes a User terminal 11 and a base station 12, where the User terminal 11 may be a User Equipment (UE), such as a terminal-side Device (e.g., a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a laptop Computer (L ap Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), or a Wearable Device (Wearable Device), and the specific type of the User terminal 11 is not limited in the embodiment of the present invention, and the base station 12 may be a base station of 5G or later (e.g., a gNB, a 5G NR NB), or a base station in other communication systems, or referred to as a node B, an evolved node B, or other words in the field, as long as the same technical effect is achieved, the base station is not limited to a specific technical effect, and the base station is only limited to the type of the base station 12.

It should be noted that the communication device in the embodiment of the present invention may be the user terminal 11 or may be the base station 12, and the specific functions of the communication device will be described in detail through the following embodiments.

Referring to fig. 2, fig. 2 is a flowchart of a method for mapping a PTRS according to an embodiment of the present invention, where the method is applied to a communication device, and the communication device may be a user terminal or a base station. As shown in fig. 2, the method includes the following steps:

step 201, obtaining PTRS.

The PTRS may be generated by the user equipment, or the PTRS may be pre-stored in the user equipment, and the embodiment of the present invention is not limited thereto.

Step 202, setting the PTRS to have the time domain density of 1/d_tMapping to a subcarrier where at least one RE in an OFDM symbol of a micro-slot is located, wherein the subcarrier is the subcarrier where the DMRS is located, the at least one RE is an RB unoccupied by CORESET, and d_tA step size greater than or equal to 1, and d_tLess than the number of OFDM symbols included in the minislot.

The minislots may include two, four, or seven Orthogonal Frequency Division Multiplexing (OFDM) symbols, and so on. Assuming micro-timeA slot consists of L OFDM symbols, L ═ 2, 4, 7, CORESET can occupy several RBs of the first OFDM symbol, and the frequency range corresponding to CORESET is denoted as

Wherein

For system bandwidth, l 1.. times.min { L-1, 3 }.

In addition, the time domain density is 1/d_tCan be understood as per d_tOne PTRS symbol to be mapped exists in one OFDM symbol, or it can be understood that the interval (the number of OFDM symbols) between OFDM symbols where adjacent PTRS are located is d_t-1. In addition, d is as defined above_tConfigured by the base station by means of higher layer signaling or physical layer signaling, d_t1, 2, 4, etc., for example: the base station configures the d through Radio Resource Control (RRC) signaling or Downlink Control Information (DCI)_t. In addition, d is as defined above_tA step size of 1 or more can also be understood as meaning that d is as defined above_tIs an integer greater than or equal to 1, and d is used in the process of selecting the mapping position of the PTRS_tThe step size is extended to select the location where the PTRS needs to be mapped.

The sub-carrier where the DMRS is located and the at least one RE is an RB not occupied by the CORESET may be understood as that the frequency domain position mapped by the PTRS resource is one or more RBs (for example, denoted as "RB") other than the CORESET

i-1, 2. -) on a subcarrier. The RBs are RBs with the largest or smallest numbers except the CORESET, or are configured by the base station through higher layer signaling (e.g., RRC signaling) or physical layer signaling (e.g., DCI) depending on the identity (UE ID) of the user terminal. The subcarriers on which the DMRS is located may be the subcarriersThe subcarrier with the largest subcarrier number in the RB, or the subcarrier with the smallest subcarrier number in the RB, depends on the identity of the user terminal, or is configured by the base station through higher layer signaling (such as RRC) or physical layer signaling (such as DCI).

The PTRS can be mapped to at least one RB which is not occupied by CORESET in a subcarrier where a certain DMRS is located through the steps, and the time domain density is 1/d_tTherefore, the channel estimation performance based on the DMRS and the phase noise estimation performance based on the PTRS can be considered at the same time, so that the channel estimation performance and the phase noise estimation performance based on the micro-slot transmission are improved, and the reliability of data transmission is improved. In addition, after the PTRS mapping, the PTRS may be transmitted at a corresponding location.

It should be noted that the method provided in the embodiment of the present invention may be applied to a 5G system, but is not limited thereto, and is applicable to other communication systems as long as substantially the same function can be achieved, for example: a 6G system or other communication system applying OFDM, etc. may be applied.

In the embodiment of the invention, a PTRS is obtained; the PTRS is processed with the time domain density of 1/d_tMapping to a subcarrier where at least one RE in an OFDM symbol of a micro-slot is located, wherein the subcarrier is the subcarrier where the DMRS is located, the at least one RE is an RB unoccupied by CORESET, and d_tIs an integer greater than or equal to 1, and d_tLess than the number of OFDM symbols included in the minislot. The channel estimation performance and the phase noise estimation performance based on the micro-slot transmission can be improved.

Referring to fig. 3, fig. 3 is a flowchart of a method for mapping a PTRS according to an embodiment of the present invention, where the method is applied to a communication device, and the communication device may be a user terminal or a base station. As shown in fig. 3, the method includes the following steps:

and 301, acquiring the PTRS.

Step 302, taking the OFDM symbols occupied by the DMRS in the micro-slot as reference, and taking the time domain density of the PTRS as 1/d_tMapping to at least one RE in the OFDM symbol of the micro-slotWherein the subcarrier is the subcarrier where the DMRS is located, the at least one RE is an RB unoccupied by CORESET, and d_tA step size greater than or equal to 1, and d_tLess than the number of OFDM symbols included in the minislot.

Step 302 may be to determine a pilot pattern of the PTRS and then map the PTRS according to the pilot pattern.

The OFDM symbol occupied by the DMRS in the micro slot may be an i +1 th OFDM symbol where a DMRS port carrying the PTRS is located.

The reference to the OFDM symbol occupied by the DMRS in the micro slot may be a reference point or a reference point for selecting a mapping position of the PTRS. In addition, the PTRS is set to have the time domain density of 1/d by taking the OFDM symbols occupied by the DMRS in the micro-slot as reference_tThe subcarrier on which at least one RE in the OFDM symbol mapped to the micro slot is located may be determined to have a time domain density of 1/d with reference to the OFDM symbol occupied by the DMRS in the micro slot_tThe PTRS of (1) requires mapped OFDM symbols and maps the PTRS to at least one RE in the OFDM symbols. And the OFDM symbol to be mapped by the PTRS may include an OFDM symbol occupied by the DMRS in the micro slot, or the OFDM symbol to be mapped by the PTRS does not include an OFDM symbol occupied by the DMRS in the micro slot.

Since step 302 uses the OFDM symbol occupied by the DMRS in the micro slot as a reference, the REs mapped by the PTRS and the REs occupied by the DMRS may be prevented from colliding.

As an optional implementation manner, the OFDM symbol includes: taking the OFDM symbol occupied by the DMRS in the micro-slot as a reference, and taking the step length d_tOFDM symbols extended to both sides.

Here, the OFDM symbol may be understood as an OFDM symbol mapped by the PTRS in step 302, or may be referred to as an OFDM symbol to which the PTRS needs to be mapped.

The OFDM symbol occupied by the DMRS in the micro-slot is taken as a reference, and the step length d is taken_tThe OFDM symbol extended to both sides may be OFDM occupied in a micro slot from DMRSSymbol start with step d_tAnd the OFDM symbols are extended towards two sides, wherein the extension can comprise the OFDM symbols occupied by the DMRS in the micro-slot or does not comprise the OFDM symbols occupied by the DMRS in the micro-slot.

In addition, the step d is used_tThe OFDM symbol extended to both sides may be, in step d_tExpanding in a first direction by a step d_tAnd extends in a second direction up to the boundary of the minislot.

In this embodiment, the OFDM symbol occupied by the DMRS in the micro slot is used as a reference, and the step length d is used_tOFDM symbols extended to both sides.

Optionally, in the foregoing embodiment, if the DMRS occupies the l +1 th OFDM symbol in the micro slot, the OFDM symbol includes: from the l +1+ d_tStarting with one OFDM symbol by a step d_tAn OFDM symbol extending in a first direction, the numbering of the OFDM symbols in the minislot increasing in the first direction, and further comprising: from said l +1-d_tStarting with one OFDM symbol by a step d_tAnd the number of the OFDM symbols in the micro-slot decreases progressively along the second direction, and l is an integer greater than or equal to 1.

From said l +1+ d_tStarting with one OFDM symbol by a step d_tThe OFDM symbol extending to the first direction can be understood as being from the l +1+ d_tOne OFDM symbol starts every d_tEach OFDM symbol includes an OFDM symbol to which the PTRS needs to be mapped, for example: l +1+ d_tOne OFDM symbol is an OFDM symbol needing mapping for PTRS, and the l +1+2d_tOne OFDM symbol is an OFDM symbol to which the PTRS needs to be mapped.

In addition, from the l +1+ d_tStarting with one OFDM symbol by a step d_tThe OFDM symbol extended to the first direction may be from the l +1+ d_tStarting with one OFDM symbol by a step d_tOFDM symbols extending in a first direction up to a last OFDM symbol of the minislot; from said l +1-d_tStarting with one OFDM symbol by a step d_tThe OFDM symbol extending in the second direction may be, e.g., fromThe l +1-d_tStarting with one OFDM symbol by a step d_tAn OFDM symbol extending in a second direction up to a last OFDM symbol of the micro-slot.

It should be noted that, in the embodiment of the present invention, all the extensions to the first direction may be the last OFDM symbol extended to the micro slot, and all the extensions to the second direction may be the first OFDM symbol extended to the micro slot, and details of the rest of the places are not described herein, but the embodiment of the present invention does not limit this.

In addition, the above-mentioned I +1+ d_tStarting with one OFDM symbol by a step d_tThe OFDM symbols extended to the first direction may also be referred to as starting from the (l + 1) th OFDM symbol by a step d_tThe OFDM symbols are expanded to the first direction, but the l +1 th OFDM symbol is not included in the expansion process; from said l +1-d_tStarting with one OFDM symbol by a step d_tThe OFDM symbol extended to the second direction may also be referred to as starting from the (l + 1) th OFDM symbol by a step d_tAnd the OFDM symbols are expanded towards the second direction, but the (l + 1) th OFDM symbol is not included in the expansion process.

The first direction may also be referred to as a right direction because the number of the OFDM symbols in the pilot pattern increases in the forward direction, and the second direction may also be referred to as a left direction because the number of the OFDM symbols in the pilot pattern decreases in the forward direction.

For example: when a DMRS port carrying PTRS is positioned at the l +1 th OFDM symbol, the PTRS is mapped in the step d from the OFDM symbol (not including the OFDM symbol) where the DMRS is positioned_tOn the OFDM symbols extending to the left and right, up to the boundary of the minislot (i.e., the first symbol and the last symbol), as shown in fig. 4.

In particular, when L is 2 and d_tWhen > 1, the communication device does not transmit the PTRS even if the PTRS is configured, e.g., the RRC signaling configures PTRS presence (PTRS presence).

The following is illustrated in a specific pattern:

the micro-slot contains two OFDM symbols, L-2. the 3 rd, 4 th two RB resources of the first symbol are configured as CORESET and the DMRS port carrying the PTRS is located at the 2 nd OFDM symbol.

When d is_tWhen 1, the PTRS is mapped on the DMRS subcarrier with the largest subcarrier number within the 1 st and 5 th RBs of the 1 st OFDM symbol, as shown in fig. 5.

Alternatively, a minislot may comprise four OFDM symbols. The 3 rd and 4 th RB resources of the first symbol are configured as CORESET, and the DMRS port carrying the PTRS is located at the 2 nd OFDM symbol. The frequency domain density of PTRS is assumed to insert one PTRS subcarrier every 4 RBs.

When d is_tWhen 1, the PTRS is mapped on the DMRS subcarrier with the largest subcarrier number in the 1 st RB and the 5 th RB of the 1 st, 3 rd and 4 th OFDM symbols, as shown in fig. 6 (a); when d is_tWhen 2, the PTRS is mapped on the DMRS subcarrier with the largest subcarrier number in the 1 st and 5 th RBs of the 4 th OFDM symbol, as shown in fig. 6 (B).

Optionally, in the foregoing embodiment, if the DMRS occupies a first OFDM symbol and an l +1 th OFDM symbol in the micro slot, and a frequency domain position occupied by the DMRS in the l +1 th OFDM symbol corresponds to a frequency domain position occupied by CORESET, the OFDM symbol includes: starting from the l +1 th OFDM symbol by a step d_tAnd the OFDM symbols are expanded towards two sides, wherein the end point of the expansion is the boundary of the micro time slot, and l is an integer greater than or equal to 1.

Starting from the l +1 th OFDM symbol with step d_tThe OFDM symbols extended to both sides may be, starting from the l +1 th OFDM symbol, with a step d_tOFDM symbols extending in a first direction, and starting from the l +1 th OFDM symbol with a step d_tAn OFDM symbol extending in a second direction.

In this embodiment, the DMRS port carrying the PTRS may be located at the 1 st (frequency range outside of CORESET)

) And the l +1 th (in the frequency range corresponding to CORESET)

) When two OFDM symbols are used, PTRS is mapped in the l +1 th OFDM symbol where the DMRS is positioned by step size d_tOn the OFDM symbols extending to the left and right, up to the boundary of the minislot (i.e., the first symbol and the last symbol), as shown in fig. 7. And if the PTRS conflicts with the DMRS in the leftward extension process, perforating the PTRS on the conflict position resource particles.

For example: the micro-slot contains seven OFDM symbols. The 3 rd and 4 th RB resources of the first three symbols are configured as CORESET, and DMRS ports carrying PTRS are located at the 1 st (frequency range other than CORESET) and 4 th (frequency range corresponding to CORESET) two OFDM symbols. The frequency domain density of PTRS is assumed to insert one PTRS subcarrier every 4 RBs.

When d is_tWhen 2, the PTRS is mapped on the DMRS subcarrier with the largest subcarrier number within the 1 st and 5 th RBs of the 2 nd, 4 th and 6 th two OFDM symbols, as shown in fig. 8.

Optionally, in the foregoing embodiment, if the DMRS occupies the ith mini-slot₁+1 OFDM symbol and l₂An OFDM symbol, then the OFDM symbol comprises: from the l-th of the minislot₁+1-d_tStarting with one OFDM symbol by a step d_tAn OFDM symbol extending in a second direction, the number of OFDM symbols in the minislot decreasing in the second direction, and further comprising: from the ll th of the minislot₁+1+d_tStarting with one OFDM symbol by a step d_tAn OFDM symbol extending towards a first direction, the end point of the extension being the ll-th of the minislot₂-1 OFDM symbol, and further comprising: from the l-th of the minislot₂+d_tStarting with one OFDM symbol by a step d_tOFDM symbol extending to a first direction, the l₁Is an integer greater than or equal to 1, and₁+1＜l₂and L is the number of OFDM symbols included in the micro time slot.

Wherein, the first₁The +1 OFDM symbols may be OFDM symbols occupied by a preamble DMRS (frontladded DMRS) of a DMRS port carrying PTRS,the above first₂The number of OFDM symbols may be an OFDM symbol occupied by an additional dmrs (additional dmrs) symbol.

In this embodiment, if the DMRS occupies the ith mini-slot, the DMRS may be determined to be the first mini-slot₁+1 OFDM symbol and l₂The OFDM symbol, the OFDM symbol to be mapped by PTRS and the corresponding RE are determined.

In this embodiment, specifically, when the pre-DMRS (frontladed DMRS) symbol of the DMRS port carrying the PTRS is located at the lth DMRS₁+1 OFDM symbols, and an additional DMRS (additional DMRS) symbol located at the l₂One OFDM symbol,/₁+1＜l₂When L is ≦ PTRS is mapped on the following OFDM symbol, as shown in FIG. 9.

From the l-th position where the preamble DMRS symbol is located₁+1 OFDM symbols (excluding the symbol) in step d_tExtending to the left up to the left boundary of the minislot (i.e., the 1 st symbol); and

from the l-th of the additional DMRS symbol₂One OFDM symbol (excluding the symbol) by step d_tExtending right up to the right boundary of the minislot (i.e., the last symbol); and

from the first₁+1 (excluding the symbol) symbols in step d_tExpand rightward until the l₂-1 symbol.

For example: the micro-slot contains seven OFDM symbols. The 3 rd and 4 th RB resources of the first two symbols are configured as CORESET, and the pre-DMRS symbol of the DMRS port carrying the PTRS is located at the 3 rd OFDM symbol, and the additional DMRS symbol is located at the 5 th OFDM symbol. The frequency domain density of PTRS is assumed to insert one PTRS subcarrier every 4 RBs.

When d is_tWhen 2, the PTRS is mapped on the DMRS subcarriers with the largest subcarrier numbers within the 1 st and 5 th RBs of the 1 st and 7 th OFDM symbols, as shown in fig. 10.

As another optional implementation, the OFDM symbol includes: based on the OFDM symbols occupied by the DMRS in the micro-slot, taking the first OFDM symbol of the micro-slot as a reference, and taking the step length d_tOFDM symbol extending to a first direction, wherein in the micro-slotThe numbering of the OFDM symbols is incremented in said first direction.

Wherein, the OFDM symbol occupied in the micro-slot based on the DMRS is referred to the first OFDM symbol of the micro-slot and the step length d_tAn OFDM symbol extending in a first direction is understood to be a symbol which is referenced to the first OFDM symbol of the minislot in step d_tThe OFDM symbols extending towards the first direction need to consider the OFDM symbols occupied by the DMRS in the micro-slot, so as to avoid the collision between the PTRS and the DMRS.

In addition, the first direction can refer to the first direction described above, and is not described herein again.

Optionally, in the foregoing embodiment, if the DMRS occupies the l +1 th OFDM symbol in the micro slot, the OFDM symbol includes: starting from the first OFDM symbol of the minislot with a step d_tAnd the OFDM symbols are extended towards the first direction, and l is an integer greater than or equal to 1.

In this embodiment, it may be implemented that the l +1 th OFDM symbol is occupied by the DMRS in the micro slot, and the step d is started from the first OFDM symbol of the micro slot_tOFDM symbols extending in a first direction up to the last OFDM symbol of the mini-slot.

Specifically, when the DMRS port carrying the PTRS is located at the l +1 th OFDM symbol, the PTRS mapping may start from the 1 st OFDM symbol by a step d_tTo the right of the extended OFDM symbol up to the right boundary of the mini-slot (i.e., the last symbol), as shown in fig. 11. And if the PTRS collides with the DMRS in the extension process, puncturing the PTRS at the conflict position RE.

For example: the minislot contains four OFDM symbols. The 3 rd and 4 th RB resources of the first symbol are configured as CORESET, and the DMRS port carrying the PTRS is located at the 2 nd OFDM symbol. The frequency domain density of PTRS is assumed to insert one PTRS subcarrier every 4 RBs. When d is_tWhen 2, the PTRS is mapped on the DMRS subcarriers with the largest subcarrier numbers within the 1 st and 5 th RBs of the 1 st and 3 rd three OFDM symbols, as shown in fig. 12.

Optionally, in the foregoing embodiment, if the DMRS is in the micro-timeA slot occupies a first OFDM symbol and an l +1 th OFDM symbol, and a frequency domain position occupied by the DMRS in the l +1 th OFDM symbol corresponds to a frequency domain position occupied by CORESET, so that the OFDM symbol includes: from the 1+ d th of the minislot_tStarting with one OFDM symbol by a step d_tAnd the OFDM symbols are extended towards the first direction, and l is an integer greater than or equal to 1.

This embodiment may be specifically configured when the DMRS port carrying the PTRS is located at the 1 st (frequency range outside of CORESET)

) And the l +1 th (in the frequency range corresponding to CORESET)

) In the case of two OFDM symbols, PTRS is mapped in step d from the 1 st OFDM symbol (excluding the symbol)_tTo the right of the extended OFDM symbol up to the right boundary of the mini-slot (i.e., the last symbol), as shown in fig. 13.

For example: the minislot contains four OFDM symbols. The 3 rd and 4 th RB resources of the first symbol are configured as CORESET, and the DMRS port carrying the PTRS is located at the 1 st (frequency range outside the CORESET) and 2 nd (frequency range corresponding to the CORESET) two OFDM symbols. The frequency domain density of PTRS is assumed to insert one PTRS subcarrier every 4 RBs.

When d is_tWhen 1, the PTRS is mapped on the DMRS subcarrier with the largest subcarrier number in the 1 st RB and the 5 th RB of the 2 nd, 3 rd, and 4 th OFDM symbols, as shown in fig. 14 (a); when d is_tWhen 2, the PTRS is mapped on the DMRS subcarrier with the largest subcarrier number in the 1 st and 5 th RBs of the 3 rd OFDM symbol, as shown in fig. 14 (B).

Optionally, in the foregoing embodiment, if the DMRS occupies a first OFDM symbol and an l +1 th OFDM symbol in the micro slot, and a frequency domain position occupied by the DMRS in the l +1 th OFDM symbol corresponds to a frequency domain position occupied by CORESET, the OFDM symbol includes: from the 1+ d th of the minislot_tStarting with one OFDM symbol by a step d_tOF expanding toward first directionA DM symbol, the end point of the extension being the l OFDM symbol of the minislot, and further comprising: starting from the l +1 OFDM symbol of the minislot with a step d_tAnd the OFDM symbols are extended towards the first direction, and l is an integer greater than or equal to 1.

In this embodiment, specifically, when the DMRS port carrying the PTRS is located at the 1 st (frequency range outside the CORESET)

) And the l +1 th (in the frequency range corresponding to CORESET)

) Two OFDM symbols, the PTRS maps on the following OFDM symbols, as shown in fig. 15:

starting from the 1 st OFDM symbol (excluding the symbol) by a step d_tSpreading the OFDM symbols to the right until the ith OFDM symbol; and

starting from the l +1 th OFDM symbol with step d_tTo the right of the extended OFDM symbol up to the right boundary of the minislot (i.e., the last symbol).

For example: the micro-slot contains seven OFDM symbols. The 3 rd and 4 th RB resources of the first three symbols are configured as CORESET, and DMRS ports carrying PTRS are located at the 1 st (frequency range outside CORESET) and 4 th (frequency range corresponding to CORESET) two OFDM symbols. The frequency domain density of PTRS is assumed to insert one PTRS subcarrier every 4 RBs.

When d is_tWhen the number of the subcarriers is 2, the PTRS is mapped to the DMRS subcarrier with the largest subcarrier number in the 1 st RB and the 5 th RB of the 3 rd, 4 th, and 6 th OFDM symbols, as shown in fig. 16.

Optionally, in the foregoing embodiment, if the DMRS occupies the ith mini-slot₁+1 OFDM symbol and l₂An OFDM symbol, then the OFDM symbol comprises: starting from the first OFDM symbol of the minislot with a step d_tAn OFDM symbol extending to a first direction, where l is an integer greater than or equal to 1, and₁+1＜l₂l is less than the number of OFDM symbols included in the micro time slot。

Wherein, the above-mentioned first₁The +1 OFDM symbols may be OFDM symbols occupied by a preamble DMRS (frontleded DMRS) of a DMRS port carrying PTRS, the l < th > OFDM symbol₂The number of OFDM symbols may be an OFDM symbol occupied by an additional dmrs (additional dmrs).

The implementation manner may specifically be that when the pre-DMRS (fronted DMRS) symbol of the DMRS port carrying the PTRS is located at the l +1 th OFDM symbol, and the additional DMRS (additional DMRS) symbol is located at the l +1 th OFDM symbol₂One OFDM symbol,/₁+1＜l₂At ≦ L, the PTRS mapping starts with the 1 st OFDM symbol with step size d_tOn the OFDM symbol extended to the right as shown in fig. 17. And if the PTRS conflicts with the DMRS in the extension process, perforating the PTRS on the conflict position resource particles.

At that time, the PTRS is mapped on the DMRS subcarriers with the largest subcarrier numbers in the 1 st and 5 th RBs of the 1 st and 7 th OFDM symbols, as shown in fig. 10.

Optionally, in the foregoing embodiment, if the DMRS occupies the first OFDM symbol and the l-th OFDM symbol in the micro slot₁+1 OFDM symbol and l₂One OFDM symbol, and the DMRS is at the l₁The frequency domain positions occupied by +1 OFDM symbols correspond to the frequency domain positions occupied by CORESET, and the OFDM symbols include: from the 1+ d th of the minislot_tStarting with one OFDM symbol by a step d_tOFDM symbol extending to a first direction, the l₁Is an integer greater than or equal to 1, and₁+1＜l₂and L is the number of OFDM symbols included in the micro time slot.

In this embodiment, specifically, in a micro slot composed of L OFDM symbols, L ═ 2, 4, 7, when CORESET occupies first l₁Several RBs of an OFDM symbol (with their corresponding frequency ranges notedIs composed of

Wherein

System bandwidth) of₁1, min { L-1, 3}, and the preamble DMRS symbol of the DMRS port carrying the PTRS is located at the 1 st (frequency range outside CORESET)

) And l₁+1 (in the frequency range corresponding to CORESET

) Two OFDM symbols, and an additional DMRS (additional DMRS) symbol is located at the l₂One OFDM symbol, l₁+1＜l₂Mapping at # 1+ d ≦ L_tStarting with one OFDM symbol by a step d_tOn the OFDM symbol extended to the right as shown in fig. 18. And if the PTRS collides with the additional DMRS in the extension process, puncturing the PTRS on the conflict position resource particles.

For example: the micro-slot contains seven OFDM symbols. The 3 rd and 4 th RB resources of the first two symbols are configured as CORESET, and the front DMRS symbols of the DMRS port carrying the PTRS are located at the 1 st (frequency range outside the CORESET) and 3 rd (frequency range corresponding to the CORESET) two OFDM symbols, and the additional DMRS symbol is located at the 5 th OFDM symbol. The frequency domain density of PTRS is assumed to insert one PTRS subcarrier every 4 RBs.

When d is_tWhen 2, the PTRS is mapped on the DMRS subcarrier with the largest subcarrier number in the 1 st RB and the 5 th RB of the 3 rd and 7 th OFDM symbols, as shown in fig. 19.

Optionally, in the foregoing embodiment, if the DMRS occupies the first OFDM symbol and the l-th OFDM symbol in the micro slot₁+1 OFDM symbol and l₂One OFDM symbol, and the DMRS is in the l1+1 OFDM symbolThe frequency domain position occupied by the number corresponds to the frequency domain position occupied by the CORESET, and the OFDM symbol comprises: from the 1+ d th of the minislot_tStarting with one OFDM symbol by a step d_tAn OFDM symbol extending towards a first direction, the end point of the extension being the l-th₂-1 OFDM symbol, and further comprising: from the l-th of the minislot₂+d_tStarting with one OFDM symbol by a step d_tOFDM symbol extending to a first direction, the l₁Is an integer greater than or equal to 1, and₁+1＜l₂and L is the number of OFDM symbols included in the micro time slot.

In this embodiment, specifically, in a micro slot composed of L OFDM symbols, L ═ 2, 4, 7, when CORESET occupies first l₁A number of RBs of an OFDM symbol (the corresponding frequency range is denoted as

Wherein

) And l₁+1 (in the frequency range corresponding to CORESET

) Two OFDM symbols, and an additional DMRS (additional DMRS) symbol is located at the l₂One OFDM symbol, l₁+1＜l₂≦ L is mapped on the following OFDM symbol as shown in FIG. 20:

starting from the 1 st OFDM symbol where the DMRS is located (excluding the symbol) by a step d_tExpand rightward until the l₂-1 OFDM symbol; and

from the first₂Starting with (excluding) one OFDM symbol by a step d_tExtending to the right up to the right boundary of the minislot (i.e., the last symbol).

For a specific mapping, see fig. 19 and related description, which are not described herein.

Optionally, in this embodiment, if the OFDM symbol to be mapped by the PTRS includes the OFDM symbol occupied by the DMRS, and the RE to be mapped by the PTRS on the OFDM symbol includes the RE occupied by the DMRS, the PTRS is not mapped on the RE occupied by the DMRS in the OFDM symbol.

In this embodiment, if the RE to be mapped by the PTRS collides with the RE occupied by the DMRS, the PTRS at the position may be punctured, so as to avoid the collision between the PTRS and the DMRS.

In this embodiment, the same advantageous effects can be achieved by combining the various embodiments described above.

In the embodiment of the present invention, the PTRS is not limited to be mapped with reference to the OFDM symbol occupied by the DMRS in the micro slot, or the PTRS may be mapped with reference to the first OFDM symbol of the micro slot.

In this embodiment, various optional implementation manners are added on the basis of the embodiment shown in fig. 2, so that the reliability of data transmission can be further improved.

Referring to fig. 21, fig. 21 is a structural diagram of a communication device according to an embodiment of the present invention, and as shown in fig. 21, the communication device 2100 includes:

an obtaining module 2101 configured to obtain a PTRS;

a mapping module 2102 for mapping the PTRS at a time domain density of 1/d_tMapping to a subcarrier where at least one RE in an OFDM symbol of a micro-slot is located, where the subcarrier is a subcarrier where a demodulation reference signal (DMRS) is located, the at least one RE is an RB not occupied by a control resource set (CORESET), and d_tA step size greater than or equal to 1, and d_tLess than the number of OFDM symbols included in the minislot.

Those skilled in the art will appreciate that the above-described modules may be implemented as software, or hardware, or a combination of hardware and software.

Optionally, the mapping module 2102 is configured to refer to an OFDM symbol occupied by the DMRS in the micro slot, and use the time domain density of the PTRS as 1/d_tMapping to a subcarrier on which at least one RE in an OFDM symbol of the micro slot is located.

Optionally, the OFDM symbol includes: taking the OFDM symbol occupied by the DMRS in the micro-slot as a reference, and taking the step length d_tOFDM symbols extended to both sides.

Optionally, if the DMRS occupies the l +1 th OFDM symbol in the micro slot, the OFDM symbol includes: from the l +1+ d_tStarting with one OFDM symbol by a step d_tAn OFDM symbol extending in a first direction, the numbering of the OFDM symbols in the minislot increasing in the first direction, and further comprising: from said l +1-d_tStarting with one OFDM symbol by a step d_tThe serial number of the OFDM symbols in the micro-slot decreases progressively along the second direction, and l is an integer greater than or equal to 1; or

If the DMRS occupies a first OFDM symbol and an l +1 th OFDM symbol in the micro-slot, and a frequency domain position occupied by the DMRS in the l +1 th OFDM symbol corresponds to a frequency domain position occupied by CORESET, the OFDM symbol includes: starting from the l +1 th OFDM symbol by a step d_tThe OFDM symbol is expanded to two sides, wherein the end point of the expansion is the boundary of the micro time slot, and l is an integer greater than or equal to 1; or

If the DMRS occupies the ith micro-slot₁+1 OFDM symbol and l₂An OFDM symbol, then the OFDM symbol comprises: from the l-th of the minislot₁+1-d_tStarting with one OFDM symbol by a step d_tAn OFDM symbol extending in a second direction, the number of OFDM symbols in the minislot decreasing in the second direction, and further comprising: from the l-th of the minislot₁+1+d_tStarting with one OFDM symbol by a step d_tAn OFDM symbol extending in a first direction, the end point of the extension being the l-th of the minislot₂-1 OFDM symbol, and further comprising: from the l-th of the minislot₂+d_tStarting with one OFDM symbol by a step d_tOFDM symbol extending to a first direction, the l₁Is an integer greater than or equal to 1, and₁+1＜l₂and L is the number of OFDM symbols included in the micro time slot.

Optionally, the OFDM symbol includes: based on the OFDM symbols occupied by the DMRS in the micro-slot, taking the first OFDM symbol of the micro-slot as a reference, and taking the step length d_tAn OFDM symbol extending in a first direction, wherein the numbering of the OFDM symbols in the minislot is incremented in the first direction.

Optionally, if the DMRS occupies the l +1 th OFDM symbol in the micro slot, the OFDM symbol includes: starting from the first OFDM symbol of the minislot with a step d_tAn OFDM symbol extending to a first direction, wherein l is an integer greater than or equal to 1; or

If the DMRS occupies a first OFDM symbol and an l +1 th OFDM symbol in the micro-slot, and a frequency domain position occupied by the DMRS in the l +1 th OFDM symbol corresponds to a frequency domain position occupied by CORESET, the OFDM symbol includes: from the 1+ d th of the minislot_tStarting with one OFDM symbol by a step d_tAn OFDM symbol extending to a first direction, wherein l is an integer greater than or equal to 1; or

If the DMRS occupies a first OFDM symbol and an l +1 th OFDM symbol in the micro-slot, and a frequency domain position occupied by the DMRS in the l +1 th OFDM symbol corresponds to a frequency domain position occupied by CORESET, the OFDM symbol includes: from the 1+ d th of the minislot_tStarting with one OFDM symbol by a step d_tAn OFDM symbol extending in a first direction, the end of the extension being the l-th OFDM symbol of the minislot, and further comprising: starting from the l +1 OFDM symbol of the minislot with a step d_tAn OFDM symbol extending to a first direction, wherein l is an integer greater than or equal to 1; or

If the DMRS occupies the ith micro-slot₁+1 OFDM symbol and l₂An OFDM symbol, then the OFDM symbol comprises: starting from the first OFDM symbol of the minislot with a step d_tAn OFDM symbol extending to a first direction, where l is an integer greater than or equal to 1, and₁+1＜l₂l is less than or equal to the number of OFDM symbols included in the micro-slot

If the DMRS occupies the first OFDM symbol and the l < th > symbol in the micro-slot₁+1 OFDM symbol and l₂One OFDM symbol, and the DMRS is at the l₁The frequency domain positions occupied by +1 OFDM symbols correspond to the frequency domain positions occupied by CORESET, and the OFDM symbols include: from the 1+ d th of the minislot_tStarting with one OFDM symbol by a step d_tOFDM symbol extending to a first direction, the l₁Is an integer greater than or equal to 1, and₁+1＜l₂l is less than or equal to the number of OFDM symbols included in the micro-slot

If the DMRS occupies the first OFDM symbol and the l < th > symbol in the micro-slot₁+1 OFDM symbol and l₂One OFDM symbol, and the DMRS is at the l₁The frequency domain positions occupied by +1 OFDM symbols correspond to the frequency domain positions occupied by CORESET, and the OFDM symbols include: from the 1+ d th of the minislot_tStarting with one OFDM symbol by a step d_tAn OFDM symbol extending towards a first direction, the end point of the extension being the l-th₂-1 OFDM symbol, and further comprising: from the l-th of the minislot₂+d_tStarting with one OFDM symbol by a step d_tOFDM symbol extending to a first direction, the l₁Is an integer greater than or equal to 1, and₁+1＜l₂and L is the number of OFDM symbols included in the micro time slot.

Optionally, if the OFDM symbol to be mapped by the PTRS includes an OFDM symbol occupied by the DMRS, and the REs to be mapped by the PTRS on the OFDM symbol include REs occupied by the DMRS, the PTRS is not mapped on the REs occupied by the DMRS in the OFDM symbol.

The user terminal provided in the embodiment of the present invention can implement each process implemented by the user terminal in the method embodiments of fig. 2 to fig. 3, and for avoiding repetition, the description is omitted here, and the channel estimation performance and the phase noise estimation performance based on micro slot transmission can be improved.

Figure 22 is a schematic diagram of the hardware architecture of a communication device implementing various embodiments of the present invention,

the communication device 2200 includes, but is not limited to: a radio frequency unit 2201, a network module 2202, an audio output unit 2203, an input unit 2204, a sensor 2205, a display unit 2206, a user input unit 2207, an interface unit 2208, a memory 2209, a processor 2210, a power supply 2211, and the like. Those skilled in the art will appreciate that the communication device configuration shown in fig. 22 does not constitute a limitation of the communication device, and that the communication device may include more or fewer components than those shown, or combine certain components, or a different arrangement of components. In the embodiment of the present invention, the communication device includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted communication device, a wearable device, a pedometer, and the like.

A processor 2210 for obtaining a PTRS;

the PTRS is processed with the time domain density of 1/d_tMapping to a subcarrier where at least one RE in an OFDM symbol of a micro-slot is located, wherein the subcarrier is the subcarrier where the DMRS is located, the at least one RE is an RB unoccupied by CORESET, and d_tA step size greater than or equal to 1, and d_tLess than the number of OFDM symbols included in the minislot.

Optionally, the performing of processor 2210 is with the PTRS at a time domain density of 1/d_tMapping to a subcarrier on which at least one RE in the OFDM symbol of the micro slot is located, including:

taking the OFDM symbol occupied by the DMRS in the micro-slot as a reference, and taking the time domain density of the PTRS as 1/d_tMapping to a subcarrier on which at least one RE in an OFDM symbol of the micro slot is located.

Optionally, the OFDM symbol includes: taking the OFDM symbol occupied by the DMRS in the micro-slot as a referenceBy step length d_tOFDM symbols extended to both sides.

Optionally, the OFDM symbol includes: based on the OFDM symbols occupied by the DMRS in the micro-slot,taking the first OFDM symbol of the micro-slot as a reference and the step length d_tAn OFDM symbol extending in a first direction, wherein the numbering of the OFDM symbols in the minislot is incremented in the first direction.

If the DMRS occupies the first OFDM symbol and the l < th > symbol in the micro-slot₁+1 OFDM symbol and l₂One OFDM symbolAnd the DMRS is at the l₁The frequency domain positions occupied by +1 OFDM symbols correspond to the frequency domain positions occupied by CORESET, and the OFDM symbols include: from the 1+ d th of the minislot_tStarting with one OFDM symbol by a step d_tOFDM symbol extending to a first direction, the l₁Is an integer greater than or equal to 1, and₁+1＜l₂l is less than or equal to the number of OFDM symbols included in the micro-slot

The communication device can improve the channel estimation performance and the phase noise estimation performance based on the micro-slot transmission.

It should be understood that, in the embodiment of the present invention, the rf unit 2201 may be used for receiving and transmitting signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 2210; in addition, the uplink data is transmitted to the base station. Generally, the radio frequency unit 2201 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. Further, the radio frequency unit 2201 may also communicate with a network and other devices through a wireless communication system.

The communications device provides wireless, broadband internet access to the user via the network module 2202, such as to assist the user in emailing, browsing web pages, and accessing streaming media.

The audio output unit 2203 may convert audio data received by the radio frequency unit 2201 or the network module 2202 or stored in the memory 2209 into an audio signal and output as sound. Also, the audio output unit 2203 can provide audio output related to a specific function performed by the communication device 2200 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 2203 includes a speaker, a buzzer, a receiver, and the like.

The input unit 2204 is used for receiving audio or video signals. The input Unit 2204 may include a Graphics Processing Unit (GPU) 22041 and a microphone 22042, and the Graphics Processing Unit 22041 processes image data of still pictures or video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 2206. The image frames processed by the graphics processor 22041 may be stored in the memory 2209 (or other storage medium) or transmitted via the radio frequency unit 2201 or the network module 2202. The microphone 22042 can receive sound and can process such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 2201 in case of a phone call mode.

The communication device 2200 also includes at least one sensor 2205, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 22061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 22061 and/or the backlight when the communication device 2200 is moved to the ear. As one type of motion sensor, an accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the posture of a communication device (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 2205 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.

The Display unit 2206 may include a Display panel 22061, and the Display panel 22061 may be configured in the form of a liquid Crystal Display (L acquired Crystal Display, L CD), an Organic light-Emitting Diode (O L ED), or the like.

The user input unit 2207 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the communication apparatus. Specifically, the user input unit 2207 includes a touch panel 22071 and other input devices 22072. Touch panel 22071, also referred to as a touch screen, may collect touch operations by a user on or near it (e.g., operations by a user on touch panel 22071 or near touch panel 22071 using a finger, stylus, or any other suitable object or attachment). The touch panel 22071 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 2210, and receives and executes commands sent from the processor 2210. In addition, the touch panel 22071 can be implemented by various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 22071, the user input unit 2207 may also include other input devices 22072. Specifically, the other input devices 22072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described herein.

Further, a touch panel 22071 can be overlaid on the display panel 22061, and when a touch operation is detected on or near the touch panel 22071, the touch operation can be transmitted to the processor 2210 to determine the type of the touch event, and then the processor 2210 can provide a corresponding visual output on the display panel 22061 according to the type of the touch event. Although in fig. 22, the touch panel 22071 and the display panel 22061 are two independent components for implementing the input and output functions of the communication device, in some embodiments, the touch panel 22071 may be integrated with the display panel 22061 for implementing the input and output functions of the communication device, and is not limited herein.

The interface unit 2208 is an interface for connecting an external device to the communication apparatus 2200. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 2208 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the communication apparatus 2200 or may be used to transmit data between the communication apparatus 2200 and the external device.

The memory 2209 may be used to store software programs as well as various data. The memory 2209 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 2209 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 2210 is a control center of the communication device, connects various parts of the entire communication device by various interfaces and lines, and performs various functions of the communication device and processes data by operating or executing software programs and/or modules stored in the memory 2209 and calling data stored in the memory 2209, thereby monitoring the entire communication device. Processor 2210 may include one or more processing units; preferably, processor 2210 may integrate an application processor, which handles primarily the operating system, user interface, applications, etc., and a modem processor, which handles primarily wireless communications. It is to be appreciated that the modem processor described above may not be integrated into processor 2210.

The communication device 2200 may also include a power supply 2211 (e.g., a battery) for powering the various components, and preferably, the power supply 2211 may be logically connected to the processor 2210 via a power management system to perform functions such as managing charging, discharging, and power consumption via the power management system.

In addition, the communication device 2200 includes some functional modules that are not shown, and thus will not be described in detail herein.

Preferably, an embodiment of the present invention further provides a communication device, including a processor 2210, a memory 2209, and a computer program stored in the memory 2209 and being executable on the processor 2210, where the computer program, when executed by the processor 2210, implements each process of the above-mentioned PTRS mapping method embodiment, and can achieve the same technical effect, and is not described herein again to avoid repetition.

The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the PTRS mapping method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A mapping method of a Phase Tracking Reference Signal (PTRS), comprising:

obtaining a PTRS;

the PTRS is processed with the time domain density of 1/d_tMapping to a subcarrier where at least one Resource Element (RE) in an OFDM symbol of a micro-slot is located, where the subcarrier is a subcarrier where a demodulation reference signal (DMRS) is located, the at least one RE is an RB not occupied by a control resource set (CORESET), and d_tA step size greater than or equal to 1, and d_tLess than the number of OFDM symbols included in the minislot.

2. The method of claim 1, wherein the PTRS is provided at a time domain density of 1/d_tMapping to a subcarrier on which at least one RE in an OFDM symbol of a micro-slot is located, including:

taking the OFDM symbols occupied by the DMRS in the micro-slot as reference, and taking the time domain density of the PTRS as 1/d_tMapping to a subcarrier on which at least one RE in an OFDM symbol of the micro slot is located.

3. The method of claim 2, wherein the OFDM symbol comprises: taking the OFDM symbol occupied by the DMRS in the micro-slot as a reference, and taking the step length d_tOFDM symbols extended to both sides.

4. The method of claim 3,

if the DMRS occupies the l +1 th OFDM symbol in the micro slot, the OFDM symbol includes: from the l +1+ d_tStarting with one OFDM symbol by a step d_tAn OFDM symbol extending in a first direction, the numbering of the OFDM symbols in the minislot increasing in the first direction, and further comprising: from said l +1-d_tStarting with one OFDM symbol by a step d_tThe serial number of the OFDM symbols in the micro-slot decreases progressively along the second direction, and l is an integer greater than or equal to 1; or

If the DMRS occupies the ith micro-slot₁+1 OFDM symbol and l₂One OFDM symbol, then the OFDM symbol includes: from the l-th of the minislot₁+1-d_tStarting with one OFDM symbol by a step d_tAn OFDM symbol extending in a second direction, the number of OFDM symbols in the minislot decreasing in the second direction, and further comprising: from the l-th of the minislot₁+1+d_tStarting with one OFDM symbol by a step d_tAn OFDM symbol extending in a first direction, the end point of the extension being the l-th of the minislot₂-1 OFDM symbol, and further comprising: from the l-th of the minislot₂+d_tStarting with one OFDM symbol by a step d_tOFDM symbol extending to a first direction, the l₁Is an integer greater than or equal to 1, and₁+1＜l₂and L is the number of OFDM symbols included in the micro time slot.

5. The method of claim 2, wherein the OFDM symbol comprises: based on the OFDM symbols occupied by the DMRS in the micro-slot, taking the first OFDM symbol of the micro-slot as a reference, and taking the step length d_tAn OFDM symbol extending in a first direction, wherein the numbering of the OFDM symbols in the minislot is incremented in the first direction.

6. The method of claim 5,

if the DMRS occupies the l +1 th OFDM symbol in the micro slot, the OFDM symbol includes: starting from the first OFDM symbol of the minislot with a step d_tAn OFDM symbol extending to a first direction, wherein l is an integer greater than or equal to 1; or

If the DMRS occupies a first OFDM symbol and an l +1 th OFDM symbol in the micro-slot, and a frequency domain position occupied by the DMRS in the l +1 th OFDM symbol corresponds to a frequency domain position occupied by CORESET, the OFDM symbol includes: from the 1+ d th of the minislot_tStarting with one OFDM symbol by a step d_tThe OFDM signal is expanded to a first direction, wherein l is an integer which is greater than or equal to 1, and l is an integer which is greater than or equal to 1; or

If the DMRS occupies the micro-slotA first OFDM symbol and an l +1 th OFDM symbol, and a frequency domain position occupied by the DMRS in the l +1 th OFDM symbol corresponds to a frequency domain position occupied by CORESET, then the OFDM symbols include: from the 1+ d th of the minislot_tStarting with one OFDM symbol by a step d_tAn OFDM symbol extending in a first direction, the end of the extension being the l-th OFDM symbol of the minislot, and further comprising: starting from the l +1 OFDM symbol of the minislot with a step d_tAn OFDM symbol extending to a first direction, wherein l is an integer greater than or equal to 1; or

If the DMRS occupies the first OFDM symbol and the l < th > symbol in the micro-slot₁+1 OFDM symbol and l₂One OFDM symbol, and the DMRS is at the l₁The frequency domain positions occupied by +1 OFDM symbols correspond to the frequency domain positions occupied by CORESET, and the OFDM symbols include: from the 1+ d th of the minislot_tStarting with one OFDM symbol by a step d_tAn OFDM symbol extending towards a first direction, the end point of the extension being the l-th₂-1 OFDM symbol, and further comprising: from the l-th of the minislot₂+d_tOne OFDM symbolStarting with step d_tOFDM symbol extending to a first direction, the l₁Is an integer greater than or equal to 1, and₁+1＜l₂and L is the number of OFDM symbols included in the micro time slot.

7. The method of any one of claims 1 to 6, wherein if the OFDM symbol to which the PTRS needs to be mapped comprises an OFDM symbol occupied by the DMRS, and the REs on which the PTRS needs to be mapped comprise REs occupied by the DMRS, then the PTRS is not mapped on the REs occupied by the DMRS in the OFDM symbol.

8. A communication device, comprising:

the obtaining module is used for obtaining the PTRS;

a mapping module for mapping the PTRS at a time domain density of 1/d_tMapping to a subcarrier where at least one RE in an OFDM symbol of a micro-slot is located, where the subcarrier is a subcarrier where a demodulation reference signal (DMRS) is located, the at least one RE is an RB not occupied by a control resource set (CORESET), and d_tA step size greater than or equal to 1, and d_tLess than the number of OFDM symbols included in the minislot.

9. The communications device of claim 8, wherein the mapping module is to reference an OFDM symbol occupied by the DMRS in the micro-slot to 1/d the PTRS in time domain density_tMapping to a subcarrier on which at least one RE in an OFDM symbol of the micro slot is located.

10. The communications device of claim 9, wherein the OFDM symbol comprises: taking the OFDM symbol occupied by the DMRS in the micro-slot as a reference, and taking the step length d_tOFDM symbols extended to both sides.

11. The communication device of claim 10,

12. The communications device of claim 9, wherein the OFDM symbol comprises: based on the OFDM symbols occupied by the DMRS in the micro-slot,taking the first OFDM symbol of the micro-slot as a reference and the step length d_tAn OFDM symbol extending in a first direction, wherein the numbering of the OFDM symbols in the minislot is incremented in the first direction.

13. The communication device of claim 12,

14. The communications device of any one of claims 8 to 13, wherein if the OFDM symbol on which the PTRS needs to be mapped comprises an OFDM symbol occupied by the DMRS, and the REs on which the PTRS needs to be mapped comprises REs occupied by the DMNS, then the PTRS is not mapped on the REs occupied by the DMRS in that OFDM symbol.

15. A communication device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps in the method of mapping a PTRS according to any of claims 1 to 7.

16. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, realizes the steps of the mapping method for PTRS according to any one of claims 1 to 7.