WO2019095904A1

WO2019095904A1 - Mapping method for phase tracking reference signal, and communication device

Info

Publication number: WO2019095904A1
Application number: PCT/CN2018/109824
Authority: WO
Inventors: 郤伟; 孙晓东; 孙鹏
Original assignee: 维沃移动通信有限公司
Priority date: 2017-11-16
Filing date: 2018-10-11
Publication date: 2019-05-23
Also published as: CN109802777A; CN109802777B

Abstract

Provided are a mapping method for a phase tracking reference signal, and a communication device. The method comprises: acquiring a phase tracking reference signal; and mapping, at a time domain density of 1/dt, the phase tracking reference signal onto a subcarrier at which at least one resource element in orthogonal frequency division multiplexing symbols of a micro time slot is located, wherein the subcarrier is a subcarrier where a demodulation reference signal is located, the at least one resource element is a resource block that is not occupied by a control resource set, dt is a step size greater than or equal to 1, and dt is less than the number of the orthogonal frequency division multiplexing symbols comprised in the micro time slot.

Description

Phase tracking reference signal mapping method and communication device

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. 201711138907.4, filed on Jan.

Technical field

The embodiments of the present disclosure relate to the field of communications technologies, and in particular, to a method and a communication device for mapping a Phase Tracking Reference Signal (PTRS).

Background technique

The fifth generation (5th generation, 5G) communication system uses high frequency band communication to increase the link transmission rate. However, in practical applications, the higher the operating frequency, the greater the phase noise. Therefore, for high-band transmission, in order to remove phase noise, the transmitting end needs to transmit a reference signal known by the receiving end, that is, PTRS, and the receiving end can estimate the phase noise according to it and then perform corresponding phase compensation. In addition, in order to better support low-latency services in a 5G communication system, the 5G communication system also supports mini-slot-based transmission, wherein the mini-slots may include one, two, four or seven. Orthogonal Frequency Division Multiplexing (OFDM) symbols. Since the mini-slot is a newly introduced technical feature of the 5G communication system, the current transmission method of the micro-slot-based PTRS has not been determined, resulting in poor comparison between the channel estimation performance and the phase noise estimation performance based on the mini-slot transmission.

Summary of the invention

A mapping method for PTRS, comprising:

Obtain PTRS;

Mapping the PTRS to a subcarrier on which at least one resource element (Resource Element, RE) of the OFDM symbol of the minislot is located with a time domain density of 1/d _t , where the subcarrier is a demodulation reference signal a subcarrier in which the (Demodulation Reference Signal, DMRS) is located, and the at least one RE is a resource block (RB) that is not occupied by a control resource set (CORESET), where the d _t is greater than or equal to The step size of 1, and the _{dt is} smaller than the number of OFDM symbols included in the minislot.

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

Obtain PTRS;

Mapping the PTRS with a time domain density of 1/d _t to a subcarrier where at least one RE of the OFDM symbol of the minislot is located, where the subcarrier is a subcarrier where the demodulation reference signal DMRS is located, and The at least one RE is an RB that is not occupied by CORESET, the _dt is a step size greater than or equal to 1, and the _{dt is} smaller than the number of OFDM symbols included in the minislot.

In a second aspect, an embodiment of the present disclosure further provides a communications device, including:

Obtaining a module for acquiring a PTRS;

a mapping module, configured to map the PTRS to a subcarrier where at least one resource particle RE of the OFDM symbol of the minislot is located with a time domain density of 1/d _t , where the subcarrier is a demodulation reference signal a subcarrier in which the DMRS is located, and the at least one RE is an RB that is not occupied by the control resource set CORESET, the _dt is a step size greater than or equal to 1, and the _{dt is} smaller than an OFDM symbol included in the minislot number.

In a third aspect, an embodiment of the present disclosure further provides a communication device, including: a memory, a processor, and a computer program stored on the memory and operable on the processor, the computer program being processed The steps in the mapping method of the PTRS provided by the embodiment of the present disclosure are implemented when the device is executed.

In a fourth aspect, an embodiment of the present disclosure further provides a computer readable storage medium, where the computer readable storage medium stores a computer program, where the computer program is executed by a processor to implement the embodiment of the present disclosure. The steps of the PTRS mapping method.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings used in the description of the embodiments of the present disclosure will be briefly described. It is obvious that the drawings in the following description are only some embodiments of the present disclosure. Other drawings may also be obtained from those of ordinary skill in the art in light of the inventive work.

1 is a structural diagram of a network system to which an embodiment of the present disclosure is applicable;

2 is a flowchart of a mapping method of a PTRS according to an embodiment of the present disclosure;

FIG. 3 is a flowchart of another PTRS mapping method according to an embodiment of the present disclosure;

4 is a schematic diagram of an OFDM symbol extension provided by an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a symbol mapping location according to an embodiment of the present disclosure;

6 is a schematic diagram of another symbol mapping location provided by an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of another OFDM symbol extension provided by an embodiment of the present disclosure; FIG.

FIG. 8 is a schematic diagram of another symbol mapping location according to an embodiment of the present disclosure; FIG.

FIG. 9 is a schematic diagram of another OFDM symbol extension according to an embodiment of the present disclosure;

FIG. 10 is a schematic diagram of another symbol mapping location according to an embodiment of the present disclosure; FIG.

11 is a schematic diagram of another OFDM symbol extension provided by an embodiment of the present disclosure;

FIG. 12 is a schematic diagram of another symbol mapping location according to an embodiment of the present disclosure; FIG.

FIG. 13 is a schematic diagram of another OFDM symbol extension provided by an embodiment of the present disclosure; FIG.

FIG. 14 is a schematic diagram of another symbol mapping location according to an embodiment of the present disclosure; FIG.

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

16 is a schematic diagram of another symbol mapping location provided by an embodiment of the present disclosure;

FIG. 17 is a schematic diagram of another OFDM symbol extension according to an embodiment of the present disclosure; FIG.

FIG. 18 is a schematic diagram of another OFDM symbol extension provided by an embodiment of the present disclosure; FIG.

FIG. 19 is a schematic diagram of another symbol mapping location according to an embodiment of the present disclosure; FIG.

20 is a schematic diagram of another OFDM symbol extension provided by an embodiment of the present disclosure;

FIG. 21 is a structural diagram of a communication device according to an embodiment of the present disclosure;

FIG. 22 is a structural diagram of another communication device according to an embodiment of the present disclosure.

Detailed ways

The technical solutions in the embodiments of the present disclosure are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present disclosure. It is obvious that the described embodiments are a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without departing from the inventive scope are the scope of the disclosure. "and/or" in the specification and claims mean at least one of the connected objects.

Referring to FIG. 1, FIG. 1 is a structural diagram of a network system applicable to an embodiment of the present disclosure. As shown in FIG. 1, the user terminal 11 and the base station 12 are included. The user terminal 11 may be a user equipment (User Equipment, UE). ), for example: can be a mobile phone, tablet personal computer, laptop computer, personal digital assistant (PDA), mobile Internet device (MID) or wearable A terminal device such as a device (Wearable Device), it should be noted that the specific type of the user terminal 11 is not limited in the embodiment of the present disclosure. The foregoing base station 12 may be a base station of 5G and later versions (eg, gNB, 5G NR NB), or a base station in other communication systems, or a Node B, an evolved Node B, or other words in the field, as long as The same technical effect, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiment of the present disclosure, only the 5G base station is taken as an example, but the specific type of the base station 12 is not limited.

It should be noted that the communication device in the embodiment of the present disclosure may be the user terminal 11, or may be the base station 12, and specific functions of the communication device will be specifically described by using 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 disclosure. The method is applied to a communication device, and the communication device may be a user terminal or a base station. For details, please refer to Figure 2, including the following steps:

Step 201: Acquire a PTRS.

The foregoing PTRS may be generated by the user terminal, or the user terminal may store the PTRS and the like in advance, which is not limited in this embodiment.

Step 202, the time domain PTRS density is 1 / d _t to the subcarrier mapping minislots OFDM symbol is located at least one RE, wherein said carrier is a DMRS subcarrier is located, as well as The at least one RE is an RB that is not occupied by CORESET, the _dt is a step size greater than or equal to 1, and the _{dt is} smaller than the number of OFDM symbols included in the minislot.

The above minislots may include two, four or seven Orthogonal Frequency Division Multiplexing (OFDM) symbols and the like. Suppose the minislot consists of L OFDM symbols, L=2, 4, 7, CORESET can occupy the former

Several RBs of OFDM symbols, and the frequency range corresponding to CORESET is recorded as

among them

For system bandwidth,

Further, the time-domain density of 1 / d _t PTRS be appreciated that there is a symbol to be mapped each PTRS d _t th OFDM symbol, or may be appreciated that the number of (OFDM symbol interval between adjacent OFDM symbols where PTRS ) is d _t -1. In addition, the foregoing d _t is configured by the base station by using high layer signaling or physical layer signaling, d _t =1, 2, 4, etc., for example, the base station uses Radio Resource Control (RRC) signaling or downlink control information (Downlink). Control Information, DCI) configures the above d _t . Further, the d _t is greater than or equal to the step 1 can be understood as the d _t is greater than or equal to an integer, selected PTRS mapping positions process to d _t expanded in steps, thereby selecting PTRS The location that needs to be mapped.

The subcarriers in which the subcarriers are located and the RBs in which the at least one RE is not occupied by the CORESET may be understood as: the frequency domain location of the PTRS resource mapping is one or more RBs other than the CORESET (for example,

) on a subcarrier where a DMRS is located. These RBs are RBs with the largest or smallest RB number other than CORESET or depend on the identity of the user terminal (UE ID), or RBs configured by the base station through higher layer signaling (such as RRC signaling) or physical layer signaling (such as DCI). The subcarrier on which the DMRS is located may be the subcarrier with the largest subcarrier number in the RB, or the subcarrier with the smallest subcarrier number in the RB, or depends on the identifier of the user terminal, or the base station passes the high layer signaling (such as RRC). ) or subcarriers configured by physical layer signaling (such as DCI).

Through the foregoing steps, the PTRS may be mapped to at least one RB that is not occupied by the CORESET in the subcarrier where the DMRS is located, and the time domain density is 1/d _t , so that the DMRS-based channel estimation performance and the PTRS-based channel can be simultaneously considered. Phase noise estimation performance to improve the channel estimation performance and phase noise estimation performance based on mini-slot transmission, thereby improving the reliability of data transmission. In addition, after PTRS mapping, PTRS can be sent at the corresponding location.

It should be noted that the foregoing method provided in the embodiments of the present disclosure may be applied to a 5G system, but is not limited thereto, as long as substantially the same function can be implemented, and is applicable to other communication systems, for example, a 6G system or other application OFDM can be applied. Communication system and so on.

In the embodiment of the disclosure, the PTRS is obtained, and the PTRS is mapped to the subcarrier where the at least one RE of the OFDM symbol of the minislot is located with the time domain density of 1/d _t , where the subcarrier is the DMRS. Subcarriers, and the at least one RE is an RB that is not occupied by CORESET, the _dt is an integer greater than or equal to 1, and the _{dt is} smaller than the number of OFDM symbols included in the minislot. Channel estimation performance and phase noise estimation performance based on minislot 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 disclosure. The method is applied to a communication device, and the communication device may be a user terminal or a base station. For details, please refer to Figure 3, including the following steps:

Step 301: Acquire a PTRS.

Step 302, DMRS in minislots to OFDM symbols occupied as a reference, the time domain PTRS density of 1 / d _t OFDM symbols mapped to the minislot at least one RE where subcarriers, The subcarrier is a subcarrier where the DMRS is located, and the at least one RE is an RB that is not occupied by the CORESET, the _dt is a step size greater than or equal to 1, and the _{dt is} smaller than the minislot. The number of OFDM symbols included.

Step 302 may be to first 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 minislot may be a DMRS port carrying a PTRS.

OFDM symbols.

The reference to the OFDM symbol occupied by the DMRS in the mini-slot may be that the OFDM symbol occupied by the DMRS in the mini-slot is a reference point or a reference point for selecting a PTRS mapping position. In addition, referring to the OFDM symbol occupied by the DMRS in the minislot, the PTRS is mapped to a subcarrier where at least one RE of the OFDM symbol of the minislot is located with a time domain density of 1/d _t The above may be that the OFDM symbol occupied by the DMRS in the minislot is used as a reference, and the PTRS whose time domain density is 1/d _t needs to be mapped, and the PTRS needs to be mapped on at least one of the OFDM symbols. . And the OFDM symbol that the PTRS needs to map may include the OFDM symbol occupied by the DMRS in the minislot, or the OFDM symbol that the PTRS needs to map does not include the OFDM symbol occupied by the DMRS in the minislot.

Since step 302 refers to the OFDM symbol occupied by the DMRS in the mini-slot, the RE of the PTRS mapping and the RE occupied by the DMRS can be avoided.

As an optional implementation manner, the OFDM symbol includes: an OFDM symbol that is extended to both sides by a step size d _t with reference to an OFDM symbol occupied by the DMRS in the minislot.

The above OFDM symbol can be understood as the OFDM symbol mapped OFDM symbol in step 302, or can be referred to as the OFDM symbol that the PTRS needs to map.

In the above-described mini-slot DMRS the OFDM symbols occupied as a reference, in steps d _t extended to both sides may be OFDM symbols from the minislot DMRS OFDM symbols occupied by starting with the step d _t An OFDM symbol spread on both sides, where the extension here may include the OFDM symbol occupied by the DMRS in the minislot, or the OFDM symbol occupied by the DMRS in the minislot.

Further, in the above step d _t extended to both sides of OFDM symbols may be, in steps d _t extended in the first direction, in steps d _t extended in the second direction, until the minislot boundary.

In this embodiment, the OFDM symbol is extended to the both sides by the step size d _t with reference to the OFDM symbol occupied by the DMRS in the mini-slot.

Optionally, in the above embodiment, if the DMRS is occupied by the minislot

OFDM symbols, the OFDM symbols include: from the

OFDM symbols start with an OFDM symbol that is extended in a first direction by a step _dt, the number of OFDM symbols in the minislot is incremented in the first direction, and further includes: from the

OFDM symbols starting with step d extend in the second direction OFDM symbol _t, descending along the minislot number of OFDM symbols in a second direction, said

Is an integer greater than or equal to 1.

Above from said

OFDM symbols starting with the step size d _{t in} the first direction can be understood as

OFDM symbols start every _tt OFDM symbols including one OFDM symbol that PTRS needs to map, for example:

OFDM symbols are OFDM symbols that need to be mapped by PTRS,

The OFDM symbols are OFDM symbols that the PTRS needs to map.

In addition, from the said

The OFDM symbols starting with the step size d _{t in} the first direction may be, from the

OFDM symbols start with an OFDM symbol that is spread in a first direction by a step d _t until the last OFDM symbol of the minislot;

The OFDM symbols starting with the step size d _t to the second direction may be, from the

OFDM symbols starting with step d extend in the second direction OFDM symbol _t, until the last OFDM symbols of the mini-slots, until the last OFDM symbols of the minislot.

It should be noted that, in the embodiment of the present disclosure, all the extensions to the first direction may be the last OFDM symbol extended to the minislot, and all the extensions to the second direction may be the first extension to the minislot. The OFDM symbols are not described in the rest, but the embodiments of the present disclosure do not limit this.

In addition, the above from the said

OFDM symbols starting with the step size d _{t in} the first direction may also be referred to as

OFDM symbols start with an OFDM symbol that is extended in the first direction by a step d _t , but does not include the extension process

OFDM symbols; the above from the first

An OFDM symbol in which an OFDM symbol starts to expand in a second direction in a step size d _t may also be referred to as

OFDM symbols start with an OFDM symbol that is extended in the second direction by a step d _t , but does not include the extension process

OFDM symbols.

The first direction may also be referred to as a right direction, because the number of the OFDM symbol is incremented in the pilot pattern, and the second direction may also be referred to as the left direction because the number of the OFDM symbol in the pilot pattern It is decremented to the left.

For example: when the DMRS port carrying the PTRS is located at

When the OFDM symbols, where PTRS mapped on the DMRS from the OFDM symbol (the symbol is not included) in step d _t to the left and right sides spread OFDM symbols, until the mini-slot boundary (i.e. the first symbol and The last symbol), as shown in Figure 4.

In particular, when L=2 and d _t >1, the communication device does not transmit the PTRS, and even if PTRS is configured, for example, RRC signaling configures PTRS presence.

The following is an example of a specific pattern:

The microslot contains two OFDM symbols, L=2. The 3rd and 4th RB resources of the first symbol are configured as CORESET, and the DMRS port carrying the PTRS is located in the 2nd OFDM symbol. It is assumed that the frequency domain density of the PTRS is one PTRS subcarrier inserted every 4 RBs.

When d _t =1, the PTRS is mapped on the DMRS subcarrier with the largest subcarrier number in the first and fifth RBs of the first OFDM symbol, as shown in FIG. 5.

Or alternatively, the minislot contains four OFDM symbols. The 3rd and 4th RB resources of the first symbol are configured as CORESET, and the DMRS port carrying the PTRS is located in the 2nd OFDM symbol. It is assumed that the frequency domain density of the PTRS is one PTRS subcarrier inserted every 4 RBs.

When d _t =1, the PTRS is mapped on the DMRS subcarrier with the largest subcarrier number in the first and fifth RBs of the first, third, and fourth OFDM symbols, as shown in FIG. 6(A); When d _t = 2, the PTRS is mapped on the DMRS subcarrier with the largest subcarrier number in the first and fifth RBs of the fourth OFDM symbol, as shown in FIG. 6(B).

Optionally, in the above embodiment, if the DMRS occupies the first OFDM symbol and the first slot in the minislot

OFDM symbols, and the DMRS in the

The frequency domain position occupied by the OFDM symbols corresponds to the frequency domain position occupied by the CORESET, and the OFDM symbol includes: from the

OFDM symbols starting with step d _t extended to both sides of OFDM symbols, wherein the extended end of the minislot boundary, the

Is an integer greater than or equal to 1.

Above from said

The OFDM symbols from which the OFDM symbols start to spread to the both sides in steps of d _t may be, from the

OFDM symbols start with an OFDM symbol that is extended in a first direction by a step d _t , and from the

OFDM symbols starting with step d _t extended OFDM symbol in the second direction.

In this embodiment, the DMRS port carrying the PTRS may be located at the first (in the frequency range other than CORESET)

) and

(in the frequency range corresponding to CORESET)

When two OFDM symbols are used, the PTRS is mapped at the same position as the DMRS

The OFDM symbols are on the OFDM symbols spread to the left and right sides in steps of d _{t up} to the boundaries of the minislots (ie, the first symbol and the last symbol), as shown in FIG. If the PTRS conflicts with the DMRS during the leftward expansion process, the PTRS on the collision location resource particle is punctured.

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

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

Optionally, in the above embodiment, if the DMRS is occupied by the minislot

OFDM symbols and

OFDM symbols, the OFDM symbols include: from the first of the minislots

OFDM symbols starting with step d _t extended OFDM symbol in the second direction, down along the minislot number of OFDM symbols in a second direction, and further comprising: from the first minislot

The OFDM symbols start with an OFDM symbol that is extended in the first direction by a step d _t , and the end point of the extension is the

OFDM symbols, and further comprising: from the first of the minislots

OFDM symbols starting with step d in the first direction extension OFDM symbol _t, the

Is an integer greater than or equal to 1, and

L is the number of OFDM symbols included in the minislot.

Among them, the first

The OFDM symbols may be OFDM symbols occupied by pre-DMRS (frontloaded DMRS) of the DMRS port carrying the PTRS, the foregoing

The OFDM symbols may be OFDM symbols occupied by additional DMRS (additional DMRS) symbols.

In this implementation manner, if the DMRS is occupied in the minislot,

OFDM symbols and

OFDM symbols, which determine the OFDM symbols that the PTRS needs to map, and the corresponding REs.

In this implementation manner, specifically, the front DMRS (frontloaded DMRS) symbol of the DMRS port carrying the PTRS is located at the

OFDM symbols, and additional DMRS (additional DMRS) symbols are located

OFDM symbols,

At the time, the PTRS is mapped on the following OFDM symbol, as shown in FIG.

From the first DMRS symbol

OFDM symbols (excluding the symbol) are extended leftward by the step size d _{t up} to the left boundary of the minislot (ie, the first symbol);

From the section where the extra DMRS symbol is located

OFDM symbols (excluding the symbol) are extended to the right by the step size d _{t up} to the right edge of the minislot (ie, the last symbol);

From the first

(excluding the symbol) symbols extend to the right in steps d _t until the

Symbols.

For example: a microslot contains seven OFDM symbols. The 3rd and 4th RB resources of the first two symbols are configured as CORESET, and the preamble DMRS symbols of the DMRS port carrying the PTRS are located in the 3rd OFDM symbol, and the extra DMRS symbols are located in the 5th OFDM symbol. It is assumed that the frequency domain density of the PTRS is one PTRS subcarrier inserted every 4 RBs.

When d _t = 2, the PTRS is mapped on the DMRS subcarrier with the largest subcarrier number in the first and fifth RBs of the first and seventh OFDM symbols, as shown in FIG.

As another optional implementation manner, the OFDM symbol includes: an OFDM symbol occupied by the DMRS in the mini-slot, referenced by a first OFDM symbol of the mini-slot, in a step size d _t An OFDM symbol spread in a first direction, wherein a number of OFDM symbols in the minislot is incremented in the first direction.

Wherein the DMRS based on the mini-slot of OFDM symbols occupied, in the first OFDM symbol as a reference minislot to step d _t extended OFDM symbol in the first direction as it will be appreciated, in order to the first mini-slot OFDM symbol as a reference, in steps d _t extended in the first direction DMRS OFDM symbol needs to be considered in the OFDM symbols occupied by mini-slot, to avoid conflicts between DMRS and PTRS .

In addition, the first direction may be referred to the first direction described above, and details are not described herein.

Optionally, in the foregoing implementation manner, if the DMRS is occupied in the minislot

OFDM symbols, the OFDM symbol comprising: an OFDM symbol extending from a first OFDM symbol of the minislot in a first direction in a step size d _t ,

Is an integer greater than or equal to 1.

In this implementation manner, the DMRS can be implemented in the minislot.

OFDM symbols, starting with step d _t extend in a first direction from a first OFDM symbol OFDM symbols of the mini-slots, until the last OFDM symbol minislot.

Specifically, when the DMRS port carrying the PTRS is located at the

For OFDM symbols, the PTRS is mapped onto the OFDM symbol that spreads to the right in steps of d _t from the first OFDM symbol, up to the right edge of the minislot (ie, the last symbol), as shown in FIG. If the PTRS conflicts with the DMRS during the expansion process, the PTRS on the conflict location RE is punctured.

For example: a microslot contains four OFDM symbols. The 3rd and 4th RB resources of the first symbol are configured as CORESET, and the DMRS port carrying the PTRS is located in the 2nd OFDM symbol. It is assumed that the frequency domain density of the PTRS is one PTRS subcarrier inserted every 4 RBs. When d _t = 2, the PTRS is mapped on the DMRS subcarriers having the largest subcarrier number in the first and fifth RBs of the first and third OFDM symbols, as shown in FIG.

Optionally, in the foregoing implementation manner, if the DMRS occupies the first OFDM symbol and the first slot in the minislot

OFDM symbols, and the DMRS in the

The frequency domain position occupied by the OFDM symbols corresponds to the frequency domain position occupied by the CORESET, and the OFDM symbol includes: expanding from the first +d _t OFDM symbols of the minislot to the first direction by the step size d _t OFDM symbol, said

Is an integer greater than or equal to 1.

In this implementation manner, specifically, when the DMRS port carrying the PTRS is located at the first (in the frequency range other than CORESET)

) and

(in the frequency range corresponding to CORESET)

When two OFDM symbols are used, the PTRS is mapped on the OFDM symbol extending from the 1st OFDM symbol (excluding the symbol) to the right in step size d _t until the right boundary of the minislot (ie, the last symbol), As shown in Figure 13.

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

When d _t =1, the PTRS is mapped on the DMRS subcarrier with the largest subcarrier number in the first and fifth RBs of the third, third, and fourth OFDM symbols, as shown in FIG. 14(A); When d _t = 2, the PTRS is mapped on the DMRS subcarrier having the largest subcarrier number in the first and fifth RBs of the third OFDM symbol, as shown in Fig. 14(B).

OFDM symbols, and the DMRS in the

The frequency domain position occupied by the OFDM symbols corresponds to the frequency domain position occupied by the CORESET, and the OFDM symbol includes: expanding from the first +d _t OFDM symbols of the minislot to the first direction by the step size d _t OFDM symbol, the end point of the extension is the number of the minislot

OFDM symbols, and further comprising: from the first of the minislots

Is an integer greater than or equal to 1.

) and

(in the frequency range corresponding to CORESET)

When two OFDM symbols are used, the PTRS is mapped on the following OFDM symbols, as shown in Figure 15:

Starting from the 1st OFDM symbol (excluding the symbol) on the OFDM symbol extending to the right in steps d _t until the

OFDM symbols;

From the first

The OFDM symbols start on the OFDM symbol that is spread to the right by the step size d _{t up} to the right edge of the minislot (ie, the last symbol).

When d _t = 2, the PTRS is mapped on the DMRS subcarrier with the largest subcarrier number in the first and fifth RBs of the 3rd, 4th, and 6th OFDM symbols, as shown in FIG. 16.

OFDM symbols and

Is an integer greater than or equal to 1, and

L is the number of OFDM symbols included in the minislot.

Among them, the above

The OFDM symbols may be OFDM symbols occupied by pre-DMRS (frontloaded DMRS) of the DMRS port carrying the PTRS,

The OFDM symbols may be OFDM symbols occupied by additional DMRS (additional DMRS).

OFDM symbols, and additional DMRS (additional DMRS) symbols are located

OFDM symbols,

At the time, the PTRS map is on the OFDM symbol that spreads to the right in steps of d _t from the first OFDM symbol, as shown in FIG. If the PTRS conflicts with the DMRS during the expansion process, the PTRS on the conflicting location resource particle is punctured.

Optionally, in the foregoing implementation manner, if the DMRS occupies the first OFDM symbol in the minislot,

OFDM symbols and

OFDM symbols, and the DMRS in the

Is an integer greater than or equal to 1, and

L is the number of OFDM symbols included in the minislot.

In this implementation manner, specifically, in a minislot composed of L OFDM symbols, L=2, 4, and 7 when the CORESET is occupied.

Several RBs of OFDM symbols (the corresponding frequency range is recorded as

among them

For system bandwidth),

And the pre-DMRS symbol of the DMRS port carrying the PTRS is located at the first (in the frequency range other than CORESET)

) and

(in the frequency range corresponding to CORESET)

) two OFDM symbols, and an additional DMRS (additional DMRS) symbol is located

OFDM symbols,

PTRS mapping from 1 + d _t th OFDM symbol begins with step d _t on the right extended OFDM symbol, as shown in FIG. If the PTRS conflicts with the extra DMRS during the expansion process, the PTRS on the conflicting location resource particle is punctured.

For example: a microslot contains seven OFDM symbols. The third and fourth RB resources of the first two symbols are configured as CORESET, and the pre-DMRS symbols of the DMRS port carrying the PTRS are located at the first (frequency range other than CORESET) and the third (frequency range corresponding to CORESET). OFDM symbols, and additional DMRS symbols are located at the 5th OFDM symbol. It is assumed that the frequency domain density of the PTRS is one PTRS subcarrier inserted every 4 RBs.

When d _t = 2, the PTRS is mapped on the DMRS subcarrier with the largest subcarrier number in the first and fifth RBs of the 3rd and 7th OFDM symbols, as shown in FIG.

OFDM symbols and

OFDM symbols, and the DMRS in the

The frequency domain position occupied by the OFDM symbols corresponds to the frequency domain position occupied by the CORESET, and the OFDM symbol includes: expanding from the first +d _t OFDM symbols of the minislot to the first direction by the step size d _t OFDM symbol, the end point of the extension is

OFDM symbols, and further comprising: from the first of the minislots

Is an integer greater than or equal to 1, and

L is the number of OFDM symbols included in the minislot.

Several RBs of OFDM symbols (the corresponding frequency range is recorded as

among them

For system bandwidth),

) and

(in the frequency range corresponding to CORESET)

) two OFDM symbols, and an additional DMRS (additional DMRS) symbol is located at

OFDM symbols,

The PTRS is mapped on the following OFDM symbols, as shown in Figure 20:

Starting from the first OFDM symbol in which the DMRS is located (excluding the symbol), expanding to the right in steps of d _t until the first

OFDM symbols;

From the first

The beginning of the OFDM symbol (excluding the symbol) is extended to the right by the step size d _{t up} to the right edge of the minislot (ie the last symbol).

For a specific mapping, refer to FIG. 19, and related descriptions, which are not described herein.

Optionally, in this embodiment, if the OFDM symbol that the PTRS needs to be mapped includes the OFDM symbol occupied by the DMRS, and the RE that the PTRS needs to map 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 implementation manner, if the RE that the PTRS needs to map conflicts with the RE occupied by the DMRS, the PTRS at the location is punctured, thereby avoiding the conflict between the PTRS and the DMRS.

It should be noted that, in this embodiment, the foregoing various embodiments may be implemented in combination, and the same beneficial effects can be achieved.

It should be noted that, in the embodiment of the present disclosure, the OFDM symbol occupied by the DMRS in the mini-slot is not limited to be used, and the PTRS is mapped. The first OFDM symbol of the mini-slot may be referred to as a reference, and the PTRS may be used. Map.

In this embodiment, a plurality of optional implementation manners are added on the basis of the embodiment shown in FIG. 2, which can further improve the reliability of data transmission.

Referring to FIG. 21, FIG. 21 is a structural diagram of a communication device according to an embodiment of the present disclosure. As shown in FIG. 21, the communication device 2100 includes:

An obtaining module 2101, configured to acquire a PTRS;

The mapping module 2102 is configured to map the PTRS to a subcarrier where at least one RE of the OFDM symbol of the minislot is located with a time domain density of 1/d _t , where the subcarrier is a demodulation reference signal DMRS a subcarrier in which the subcarrier is located, and the at least one RE is an RB that is not occupied by the control resource set CORESET, the _dt is a step size greater than or equal to 1, and the _{dt is} smaller than the number of OFDM symbols included in the minislot .

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

Optionally, the mapping module 2102 is configured to map the PTRS to the OFDM of the minislot with a time domain density of 1/d _t with reference to the OFDM symbol occupied by the DMRS in the minislot. At least one of the symbols is on the subcarrier where the RE is located.

Optionally, the OFDM symbol includes: an OFDM symbol that is extended to both sides by a step size d _t with reference to an OFDM symbol occupied by the DMRS in the mini-slot.

Optionally, if the DMRS is occupied in the minislot

OFDM symbols, the OFDM symbols include: from the

Is an integer greater than or equal to 1; or

If the DMRS occupies the first OFDM symbol and the first slot in the minislot

OFDM symbols, and the DMRS in the

Is an integer greater than or equal to 1; or

If the DMRS occupies the first time in the minislot

OFDM symbols and

OFDM symbols, the OFDM symbols include: from the first of the minislots

OFDM symbols, and further comprising: from the first of the minislots

Is an integer greater than or equal to 1, and

L is the number of OFDM symbols included in the minislot.

Alternatively, the OFDM symbols comprising: based on the mini-slot DMRS occupied OFDM symbol to OFDM symbol of the first mini-slot as a reference, in steps d _t extend in a first direction OFDM a symbol, wherein a number of OFDM symbols in the minislot is incremented in the first direction.

Optionally, if the DMRS is occupied in the minislot

Is an integer greater than or equal to 1; or

If the DMRS occupies the first OFDM symbol and the first slot in the minislot

OFDM symbols, and the DMRS in the

Is an integer greater than or equal to 1; or

If the DMRS occupies the first OFDM symbol and the first slot in the minislot

OFDM symbols, and the DMRS in the

OFDM symbols, and further comprising: from the first of the minislots

Is an integer greater than or equal to 1; or

If the DMRS occupies the first time in the minislot

OFDM symbols and

Is an integer greater than or equal to 1, and

L is the number of OFDM symbols included in the minislot; or

If the DMRS occupies the first OFDM symbol in the minislot,

OFDM symbols and

OFDM symbols, and the DMRS in the

Is an integer greater than or equal to 1, and

L is the number of OFDM symbols included in the minislot; or

If the DMRS occupies the first OFDM symbol in the minislot,

OFDM symbols and

OFDM symbols, and the DMRS in the

OFDM symbols, and further comprising: from the first of the minislots

Is an integer greater than or equal to 1, and

L is the number of OFDM symbols included in the minislot.

Optionally, if the OFDM symbol that the PTRS needs to map includes the OFDM symbol occupied by the DMRS, and the RE that the PTRS needs to map on the OFDM symbol includes the RE occupied by the DMRS, in the OFDM symbol, The PTRS is not mapped on the RE occupied by the DMRS.

The user terminal provided by the embodiment of the present disclosure can implement various processes implemented by the user terminal in the method embodiment of FIG. 2 to FIG. 3, to avoid repetition, details are not described herein, and channel estimation performance and phase based on minislot transmission can be improved. Noise estimation performance.

FIG. 22 is a schematic structural diagram of hardware of a communication device that implements various embodiments of the present disclosure,

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, and Power supply 2211 and other components. It will be understood by those skilled in the art that the communication device structure shown in FIG. 22 does not constitute a limitation on the communication device, and the communication device may include more or less components than those illustrated, or combine some components, or different components. Arrangement. In the disclosed embodiments, the communication device includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palmtop computer, an in-vehicle communication device, a wearable device, a pedometer, and the like.

The processor 2210 is configured to acquire a PTRS.

Mapping the PTRS with a time domain density of 1/d _t to a subcarrier where at least one RE of the OFDM symbol of the minislot is located, where the subcarrier is a subcarrier where the DMRS is located, and the at least one RE is an RB that is not occupied by CORESET, the _dt is a step size greater than or equal to 1, and the _{dt is} smaller than the number of OFDM symbols included in the minislot.

Alternatively, the processor 2210 to perform the time domain PTRS density of 1 / d on subcarriers of the OFDM symbols mapped to the minislot at least one RE where _t, comprising:

Referring to the OFDM symbol occupied by the DMRS in the minislot, the PTRS is mapped to a subcarrier where at least one RE of the OFDM symbol of the minislot is located with a time domain density of 1/d _t .

Optionally, if the DMRS is occupied in the minislot

OFDM symbols, the OFDM symbols include: from the

OFDM symbol begins with step d _t extended OFDM symbol in the second direction, down along the minislot number of OFDM symbols in a second direction, said

Is an integer greater than or equal to 1; or

If the DMRS occupies the first OFDM symbol and the first slot in the minislot

OFDM symbols, and the DMRS in the

Is an integer greater than or equal to 1; or

If the DMRS occupies the first time in the minislot

OFDM symbols and

OFDM symbols, the OFDM symbols include: from the first of the minislots

OFDM symbols, and further comprising: from the first of the minislots

Is an integer greater than or equal to 1, and

L is the number of OFDM symbols included in the minislot.

Optionally, if the DMRS is occupied in the minislot

Is an integer greater than or equal to 1; or

If the DMRS occupies the first OFDM symbol and the first slot in the minislot

OFDM symbols, and the DMRS in the

Is an integer greater than or equal to 1; or

If the DMRS occupies the first OFDM symbol and the first slot in the minislot

OFDM symbols, and the DMRS in the

OFDM symbols, and further comprising: from the first of the minislots

Is an integer greater than or equal to 1; or

If the DMRS occupies the first time in the minislot

OFDM symbols and

Is an integer greater than or equal to 1, and

L is the number of OFDM symbols included in the minislot; or

If the DMRS occupies the first OFDM symbol in the minislot,

OFDM symbols and

OFDM symbols, and the DMRS in the

Is an integer greater than or equal to 1, and

L is the number of OFDM symbols included in the minislot; or

If the DMRS occupies the first OFDM symbol in the minislot,

OFDM symbols and

OFDM symbols, and the DMRS in the

OFDM symbols, and further comprising: from the first of the minislots

Is an integer greater than or equal to 1, and

L is the number of OFDM symbols included in the minislot.

The above communication device can improve channel estimation performance and phase noise estimation performance based on minislot transmission.

It should be understood that, in the embodiment of the present disclosure, the radio frequency unit 2201 may be used for receiving and transmitting signals during and after receiving or transmitting information or a call, and specifically, receiving downlink data from the base station, and then processing the processor 2210; The uplink data is sent to the base station. In general, 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. In addition, the radio unit 2201 can also communicate with the network and other devices through a wireless communication system.

The communication device provides the user with wireless broadband Internet access through the network module 2202, such as helping the user to send and receive emails, browse web pages, and access streaming media.

The audio output unit 2203 can convert the 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 a sound. Moreover, the audio output unit 2203 can also provide audio output (eg, call signal reception sound, message reception sound, etc.) associated with a particular function performed by the communication device 2200. The audio output unit 2203 includes a speaker, a buzzer, a receiver, and the like.

The input unit 2204 is for receiving an audio or video signal. The input unit 2204 may include a graphics processing unit (GPU) 22041 and a microphone 22042, and the graphics processor 22041 images an still picture or video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The data is processed. The processed image frame can be displayed on 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 unit 2201 or the network module 2202. The microphone 22042 can receive sound and can process such sound as audio data. The processed audio data can be converted to a format output that can be transmitted to the mobile communication base station via the radio unit 2201 in the case of a telephone call mode.

Communication device 2200 also includes at least one type of sensor 2205, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display panel 22061 according to the brightness of the ambient light, and the proximity sensor can close the display panel 22061 when the communication device 2200 moves to the ear. / or backlight. As a kind of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in all directions (usually three axes). When it is stationary, it can detect the magnitude and direction of gravity. It can be used to identify the posture of communication equipment (such as horizontal and vertical screen switching, related games). , magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tapping), etc.; sensor 2205 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, Infrared sensors and the like are not described here.

The display unit 2206 is for displaying information input by the user or information provided to the user. The display unit 2206 can include a display panel 22061. The display panel 22061 can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.

The user input unit 2207 can be configured to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the communication device. Specifically, the user input unit 2207 includes a touch panel 22071 and other input devices 22072. The touch panel 22071, also referred to as a touch screen, can collect touch operations on or near the user (such as the user using a finger, a stylus, or the like on the touch panel 22071 or near the touch panel 22071. operating). The touch panel 22071 may include two parts of a touch detection device and a touch controller. Wherein, the touch detection device detects the touch orientation of the user, and detects a signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts the touch information into contact coordinates, and sends the touch information. The processor 2210 receives the commands from the processor 2210 and executes them. In addition, the touch panel 22071 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves. 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 a volume control button, a switch button, etc.), a trackball, a mouse, and a joystick, which are not described herein.

Further, the touch panel 22071 can be overlaid on the display panel 22061. When the touch panel 22071 detects a touch operation on or near it, the touch panel 22071 transmits to the processor 2210 to determine the type of the touch event, and then the processor 2210 according to the touch. The type of event provides a corresponding visual output on display panel 22061. Although in FIG. 22, the touch panel 22071 and the display panel 22061 are used as two independent components to implement the input and output functions of the communication device, in some embodiments, the touch panel 22071 can be integrated with the display panel 22061. The input and output functions of the communication device are implemented, and are not limited herein.

The interface unit 2208 is an interface in which an external device is connected to the communication device 2200. For example, the external device may include a wired or wireless headset port, an external power (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, and an audio input/output. (I/O) port, video I/O port, headphone port, and more. The interface unit 2208 can be configured to receive input from an external device (eg, data information, power, etc.) and transmit the received input to one or more components within the communication device 2200 or can be used at the communication device 2200 and externally Data is transferred between devices.

Memory 2209 can be used to store software programs as well as various data. The memory 2209 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may be stored according to Data created by the use of the mobile phone (such as audio data, phone book, etc.). Moreover, memory 2209 can include high speed random access memory, and can 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 that connects various portions of the entire communication device using various interfaces and lines, by running or executing software programs and/or modules stored in the memory 2209, and recalling data stored in the memory 2209. , performing various functions of the communication device and processing data, thereby performing overall monitoring of the communication device. The processor 2210 may include one or more processing units; preferably, the processor 2210 may integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, an application, etc., and performs modulation and demodulation. The processor primarily handles wireless communications. It can be understood that the above modem processor may not be integrated into the processor 2210.

The communication device 2200 can also include a power source 2211 (such as a battery) that supplies power to the various components. Preferably, the power source 2211 can be logically coupled to the processor 2210 through a power management system to manage charging, discharging, and power management through the power management system. And other functions.

In addition, the communication device 2200 includes some functional modules not shown, and details are not described herein again.

Preferably, an embodiment of the present disclosure further provides a communication device, including a processor 2210, a memory 2209, a computer program stored on the memory 2209 and executable on the processor 2210, when the computer program is executed by the processor 2210 The processes of the foregoing PTRS mapping method are implemented, and the same technical effects can be achieved. To avoid repetition, details are not described herein again.

The embodiment of the present disclosure further provides a computer readable storage medium, where the computer program is stored on a computer program, and the computer program is executed by the processor, and the processes of the PTRS mapping method embodiment are implemented, and can achieve the same Technical effects, to avoid repetition, will not be repeated here. The computer readable storage medium, such as a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

It is to be understood that the term "comprises", "comprising", or any other variants thereof, is intended to encompass a non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes those elements. It also includes other elements that are not explicitly listed, or elements that are inherent to such a process, method, article, or device. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or device that comprises the element.

Through the description of the above embodiments, those skilled in the art can clearly understand that the foregoing embodiment method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is better. Implementation. Based on such understanding, the technical solution of the present disclosure, which is essential or contributes to the related art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, CD-ROM). The instructions include a number of instructions for causing a terminal (which may be a cell phone, computer, server, air conditioner, or network device, etc.) to perform the methods described in various embodiments of the present disclosure.

The embodiments of the present disclosure have been described above with reference to the drawings, but the present disclosure is not limited to the specific embodiments described above, and the specific embodiments described above are merely illustrative and not restrictive, and those skilled in the art In the light of the present disclosure, many forms may be made without departing from the scope of the disclosure and the scope of the appended claims.

Claims

A method for mapping a phase tracking reference signal PTRS, comprising:

Obtain PTRS;

Mapping the PTRS with a time domain density of 1/d t to a subcarrier where at least one resource particle RE of the OFDM symbol of the minislot is located, where the subcarrier is a subcarrier where the demodulation reference signal DMRS is located And the at least one RE is an RB that is not occupied by the control resource set CORESET, the dt is a step size greater than or equal to 1, and the dt is smaller than the number of OFDM symbols included in the minislot.
The method of claim 1, wherein the PTRS is not transmitted when the number of OFDM symbols included in the minislot is two.
The method of claim 1, wherein the mapping the PTRS to a subcarrier on which at least one of the OFDM symbols of the minislot is located with a time domain density of 1/d t comprises:

The DMRS to the mini-slot of OFDM symbols occupied as a reference, the time domain PTRS density of 1 / d t on sub-carriers mapped to the minislot OFDM symbol is located at least one RE.
The method of claim 3, wherein the OFDM symbol comprises: an OFDM symbol that is spread to both sides in a step size d t with reference to an OFDM symbol occupied by the DMRS in the minislot.
The method of claim 4, wherein

If the DMRS occupies the l+1th OFDM symbol in the minislot, the OFDM symbol includes: expanding from the l+1+d t OFDM symbols in a first direction by a step size d t OFDM symbols of the minislot number in the OFDM symbol in a first direction increments, and further comprising: d 1-t OFDM symbol begins with step d t extended in the second direction from the first to l + An OFDM symbol, the number of the OFDM symbol in the minislot is decremented along the second direction, the l being an integer greater than or equal to 1; or

If the DMRS occupies the first OFDM symbol and the l+1th OFDM symbol in the minislot, and the frequency domain occupied by the DMRS in the l+1th OFDM symbol and the frequency domain occupied by the CORESET Corresponding to the location, the OFDM symbol includes: an OFDM symbol extending from the l+1th OFDM symbol to the two sides in a step size d t , wherein the extended end point is a boundary of the minislot, The l is an integer greater than or equal to 1; or

If the DMRS occupies the l 1 +1 OFDM symbol and the l 2 OFDM symbol in the minislot, the OFDM symbol includes: from the l 1 +1-d t of the minislot OFDM symbol begins with step d t extended OFDM symbol in the second direction, down along the minislot number of OFDM symbols in a second direction, and further comprising: a mini-slots from the first l 1 + 1+d t OFDM symbols start with an OFDM symbol that is extended in a first direction by a step d t , the extended end point is a l 2 -1 OFDM symbol of the minislot, and further includes: from the micro the first time slot l 2 + d t th OFDM symbol begins with step d t extended OFDM symbol in the first direction, the L 1 is an integer greater than or equal to 1, and l 1 +1 <l 2 ≤L, L is the number of OFDM symbols included in the minislot.
The method of claim 3, wherein the OFDM symbol comprises: based on an OFDM symbol occupied by the DMRS in the minislot, referenced by a first OFDM symbol of the minislot, in a step size dt An OFDM symbol that is spread in a first direction, wherein a number of OFDM symbols in the minislot is incremented in the first direction.
The method of claim 6 wherein

If the DMRS occupies the l+1th OFDM symbol in the minislot, the OFDM symbol includes: expanding from the first OFDM symbol of the minislot to the first direction by the step size d t OFDM symbol, the l is an integer greater than or equal to 1; or

If the DMRS occupies the first OFDM symbol and the l+1th OFDM symbol in the minislot, and the frequency domain occupied by the DMRS in the l+1th OFDM symbol and the frequency domain occupied by the CORESET Corresponding to the location, the OFDM symbol includes: an OFDM symbol that is extended in a first direction by a step size d t starting from a 1+d t OFDM symbol of the minislot, where l is an integer greater than or equal to 1. , the l is an integer greater than or equal to 1; or

If the DMRS occupies the first OFDM symbol and the l+1th OFDM symbol in the minislot, and the frequency domain occupied by the DMRS in the l+1th OFDM symbol and the frequency domain occupied by the CORESET Corresponding to the location, the OFDM symbol includes: an OFDM symbol extending from the first +d t OFDM symbols of the minislot in a first direction by a step d t , the extended end point being the minislot the l th OFDM symbol, and further comprising: a l + 1 from the first OFDM symbols of the minislot in steps d t extended OFDM symbol in the first direction, the l is an integer greater than or equal to 1 ;or

If the DMRS occupies the l 1 +1 OFDM symbol and the l 2 OFDM symbol in the minislot, the OFDM symbol includes: starting from the first OFDM symbol of the minislot by a step size d t an OFDM symbol extended in the first direction, the l is an integer greater than or equal to 1, and l 1 +1<l 2 ≤ L, where L is the number of OFDM symbols included in the minislot; or

If the DMRS occupies a first OFDM symbol, a l 1 +1 OFDM symbol, and a l 2 OFDM symbol in the minislot, and the DMRS is occupied by the l 1 +1 OFDM symbol The frequency domain location corresponds to a frequency domain location occupied by the CORESET, and the OFDM symbol includes: an OFDM symbol extending from the first +d t OFDM symbols of the minislot to the first direction in a step size d t , l 1 is an integer greater than or equal to 1, and l 1 +1<l 2 ≤ L, where L is the number of OFDM symbols included in the minislot; or

If the DMRS occupies a first OFDM symbol, a l 1 +1 OFDM symbol, and a l 2 OFDM symbol in the minislot, and the DMRS is occupied by the l 1 +1 OFDM symbol The frequency domain location corresponds to a frequency domain location occupied by the CORESET, the OFDM symbol comprising: an OFDM symbol extending from the first +d t OFDM symbols of the minislot to the first direction in a step size d t , the extension The end point is the l 2 -1 OFDM symbol, and further includes: an OFDM symbol extending from the l 2 +d t OFDM symbols of the minislot in a first direction by a step size d t , 1 is an integer greater than or equal to 1, and l 1 +1 < l 2 ≤ L, where L is the number of OFDM symbols included in the minislot.
The method according to any one of claims 1 to 7, wherein if the PTRS needs to be mapped, the OFDM symbol includes an OFDM symbol occupied by the DMRS, and the RE that the PTRS needs to map on the OFDM symbol includes a The RE occupied by the DMRS does not map the PTRS on the RE occupied by the DMRS in the OFDM symbol.
A communication device comprising:

Obtaining a module for acquiring a PTRS;

a mapping module, configured to map the PTRS with a time domain density of 1/d t to a subcarrier where at least one RE of the OFDM symbol of the minislot is located, where the subcarrier is a demodulation reference signal DMRS The subcarriers, and the at least one RE are RBs that are not occupied by the control resource set CORESET, the dt is a step size greater than or equal to 1, and the dt is smaller than the number of OFDM symbols included in the minislot.
The communication device according to claim 9, wherein said mapping module is configured to map said PTRS to a time domain density of 1/d t with reference to an OFDM symbol occupied by said DMRS in said minislot The subcarrier on which at least one of the OFDM symbols of the minislot is located.
The communication device of claim 10, wherein the OFDM symbol comprises: an OFDM symbol that is spread to both sides in a step size d t with reference to an OFDM symbol occupied by the DMRS in the minislot.
The communication device according to claim 11, wherein

If the DMRS occupies the l+1th OFDM symbol in the minislot, the OFDM symbol includes: expanding from the l+1+d t OFDM symbols in a first direction by a step size d t OFDM symbols of the minislot number in the OFDM symbol in a first direction increments, and further comprising: d 1-t OFDM symbol begins with step d t extended in the second direction from the first to l + An OFDM symbol, the number of the OFDM symbol in the minislot is decremented along the second direction, the l being an integer greater than or equal to 1; or

If the DMRS occupies the first OFDM symbol and the l+1th OFDM symbol in the minislot, and the frequency domain occupied by the DMRS in the l+1th OFDM symbol and the frequency domain occupied by the CORESET Corresponding to the location, the OFDM symbol includes: an OFDM symbol extending from the l+1th OFDM symbol to the two sides in a step size d t , wherein the extended end point is a boundary of the minislot, The l is an integer greater than or equal to 1; or

If the DMRS occupies the l 1 +1 OFDM symbol and the l 2 OFDM symbol in the minislot, the OFDM symbol includes: from the l 1 +1-d t of the minislot OFDM symbol begins with step d t extended OFDM symbol in the second direction, down along the minislot number of OFDM symbols in a second direction, and further comprising: a mini-slots from the first l 1 + 1+d t OFDM symbols start with an OFDM symbol that is extended in a first direction by a step d t , the extended end point is a l 2 -1 OFDM symbol of the minislot, and further includes: from the micro the first time slot l 2 + d t th OFDM symbol begins with step d t extended OFDM symbol in the first direction, the L 1 is an integer greater than or equal to 1, and l 1 +1 <l 2 ≤L, L is the number of OFDM symbols included in the minislot.
The communication device according to claim 10, wherein said OFDM symbol comprises: an OFDM symbol occupied by said mini-slot based on a DMRS, referenced by a first OFDM symbol of said mini-slot, in step size d t extended OFDM symbol in the first direction, wherein, along said incremental number of OFDM symbols in minislots first direction.
The communication device according to claim 13, wherein

If the DMRS occupies the l+1th OFDM symbol in the minislot, the OFDM symbol includes: expanding from the first OFDM symbol of the minislot to the first direction by the step size d t OFDM symbol, the l is an integer greater than or equal to 1; or

If the DMRS occupies the first OFDM symbol and the l+1th OFDM symbol in the minislot, and the frequency domain occupied by the DMRS in the l+1th OFDM symbol and the frequency domain occupied by the CORESET Corresponding to the location, the OFDM symbol includes: an OFDM symbol that is extended in a first direction by a step size d t starting from a 1+d t OFDM symbol of the minislot, where l is an integer greater than or equal to 1. ;or

If the DMRS occupies the first OFDM symbol and the l+1th OFDM symbol in the minislot, and the frequency domain occupied by the DMRS in the l+1th OFDM symbol and the frequency domain occupied by the CORESET Corresponding to the location, the OFDM symbol includes: an OFDM symbol extending from the first +d t OFDM symbols of the minislot in a first direction by a step d t , the extended end point being the minislot the l th OFDM symbol, and further comprising: a l + 1 from the first OFDM symbols of the minislot in steps d t extended OFDM symbol in the first direction, the l is an integer greater than or equal to 1 ;or

If the DMRS occupies the l 1 +1 OFDM symbol and the l 2 OFDM symbol in the minislot, the OFDM symbol includes: starting from the first OFDM symbol of the minislot by a step size d t an OFDM symbol extended in the first direction, the l is an integer greater than or equal to 1, and l 1 +1<l 2 ≤ L, where L is the number of OFDM symbols included in the minislot; or

If the DMRS occupies a first OFDM symbol, a l 1 +1 OFDM symbol, and a l 2 OFDM symbol in the minislot, and the DMRS is occupied by the l 1 +1 OFDM symbol The frequency domain location corresponds to a frequency domain location occupied by the CORESET, and the OFDM symbol includes: an OFDM symbol extending from the first +d t OFDM symbols of the minislot to the first direction in a step size d t , l 1 is an integer greater than or equal to 1, and l 1 +1<l 2 ≤ L, where L is the number of OFDM symbols included in the minislot; or

If the DMRS occupies a first OFDM symbol, a l 1 +1 OFDM symbol, and a l 2 OFDM symbol in the minislot, and the DMRS is occupied by the l 1 +1 OFDM symbol The frequency domain location corresponds to a frequency domain location occupied by the CORESET, the OFDM symbol comprising: an OFDM symbol extending from the first +d t OFDM symbols of the minislot to the first direction in a step size d t , the extension The end point is the l 2 -1 OFDM symbol, and further includes: an OFDM symbol extending from the l 2 +d t OFDM symbols of the minislot in a first direction by a step size d t , 1 is an integer greater than or equal to 1, and l 1 +1 < l 2 ≤ L, where L is the number of OFDM symbols included in the minislot.
The communication device according to any one of claims 9 to 14, wherein if the PTRS needs to be mapped, the OFDM symbol includes an OFDM symbol occupied by the DMRS, and the RE of the PTRS that needs to be mapped on the OFDM symbol includes The RE occupied by the DMRS does not map the PTRS on the RE occupied by the DMRS in the OFDM symbol.
A communication device comprising: a memory, a processor, and a computer program stored on the memory and operable on the processor, the computer program being implemented by the processor to implement as claimed in claims 1 to 8 The steps in the mapping method of the PTRS described in any one of the above.
A computer readable storage medium, wherein the computer readable storage medium stores a computer program, and when the computer program is executed by a processor, the mapping method of the PTRS according to any one of claims 1 to 8 A step of.