WO2019128805A1

WO2019128805A1 - Method and device for transmitting and receiving phase tracking reference signal

Info

Publication number: WO2019128805A1
Application number: PCT/CN2018/122093
Authority: WO
Inventors: 梅猛; 鲁照华; 蒋创新
Original assignee: 中兴通讯股份有限公司
Priority date: 2017-12-29
Filing date: 2018-12-19
Publication date: 2019-07-04
Also published as: CN109995488A

Abstract

Provided are a method and a device for transmitting and receiving a phase tracking reference signal. The method comprises the following steps: a first transmission node sends a phase tracking reference signal, wherein a frequency domain pattern of the phase tracking reference signal comprises at least one of the following: a location of a physical resource block where the reference signal is located in and a location of at least one subcarrier of the phase tracking reference signal in one physical resource block.

Description

Method and device for transmitting and receiving phase tracking reference signal

The present application claims the priority of the Chinese Patent Application, filed on Dec. 29, 2017, filed on Jan. 29, 2011, the entire disclosure of which is hereby incorporated by reference.

Technical field

The present disclosure relates to the field of communications, for example, to a method and apparatus for transmitting and receiving a phase tracking reference signal.

Background technique

High-frequency communication is susceptible to phase noise. Therefore, it is necessary to configure a phase tracking reference signal (PTRS) for phase compensation for different scenarios. Since the interference problem between subcarriers in the high frequency band is also serious, the influence of interference between subcarriers needs to be considered when configuring PTRS.

In order to reduce the impact of phase noise on the communication system, the PTRS is configured to compensate for the effects of phase noise on the communication system. At present, the PTRS for one port configures one subcarrier position, that is, a distributed PTRS, for each physical resource block (Physical Resource Block, PRB) for each N (N and the frequency domain density of the phase tracking reference signal). However, this configuration cannot effectively solve the problem of inter-subcarrier interference at this time.

Therefore, the problem of inter-subcarrier interference cannot be effectively solved by configuring a distributed PTRS in the related art.

Summary of the invention

The embodiments of the present disclosure provide a method and a device for transmitting and receiving a phase tracking reference signal, so as to at least solve the problem that the inter-subcarrier interference cannot be effectively solved by configuring a distributed PTRS in the related art.

According to an embodiment of the present disclosure, a method for transmitting a phase tracking reference signal is provided, including: a first transmission node transmitting a phase tracking reference signal; wherein, the frequency domain pattern of the phase tracking reference signal includes at least one of the following: The phase tracks the location of the physical resource block where the reference signal is located, and the position of the phase tracking reference signal in one or more subcarriers within one physical resource block.

According to another embodiment of the present disclosure, there is provided a method for receiving a phase tracking reference signal, comprising: a second transmission node receiving a phase tracking reference signal transmitted by a first transmission node; wherein a frequency domain of the phase tracking reference signal The pattern includes at least one of: a location of the physical resource block in which the phase tracking reference signal is located, and a position of the phase tracking reference signal in one or more subcarriers within a physical resource block.

According to another embodiment of the present disclosure, a receiving apparatus for a phase tracking reference signal is provided, which is applied to a second transmitting node, and includes: a receiving module, configured to receive a phase tracking reference signal sent by the first transmitting node; The frequency domain pattern of the phase tracking reference signal includes at least one of: a location of a physical resource block in which the phase tracking reference signal is located, and a position of the phase tracking reference signal in one or more subcarriers within one physical resource block.

According to still another embodiment of the present disclosure, there is also provided a computer readable storage medium storing a computer program, wherein the computer program is configured to perform the steps of any one of the method embodiments described above at runtime.

According to still another embodiment of the present disclosure, there is also provided an electronic device comprising a memory and a processor, wherein the memory stores a computer program, the processor being configured to execute the computer program to perform any of the above The steps in the method embodiments.

The first transmission node sends a phase tracking reference signal by using a solution provided by the disclosure, wherein the frequency domain pattern of the phase tracking reference signal includes at least one of: a location of the physical resource block where the phase tracking reference signal is located, the phase tracking reference The location of a signal in one or more subcarriers within a physical resource block. That is, the first transmission node configures the location of the physical resource block where the phase tracking reference signal is located and the specific location of the subcarrier, and does not target the phase tracking reference signal for one port every N (N and phase tracking reference signal) The frequency domain density correlation) physical resource block PRB is configured with one subcarrier position, thereby solving the problem that the distributed phase tracking reference signal can not better solve the inter-subcarrier interference in the related art, and the subcarrier avoidance is effectively avoided. The technical effect of interfering interference.

DRAWINGS

The drawings described herein are provided to provide an understanding of the present disclosure, and are intended to be a part of the present disclosure.

1 is a flow chart of a method of transmitting a phase tracking reference signal in accordance with an embodiment of the present disclosure.

2 is a flow chart of a method of receiving a phase tracking reference signal in accordance with an embodiment of the present disclosure.

3 is a phase tracking reference signal pattern in accordance with an alternate embodiment of the present disclosure.

4 is a phase tracking reference signal pattern (1) in accordance with an alternative embodiment of the present disclosure.

5 is a phase tracking reference signal pattern (2) in accordance with an alternative embodiment of the present disclosure.

6 is a phase tracking reference signal pattern (3) in accordance with an alternative embodiment of the present disclosure.

7 is a phase tracking reference signal pattern (4) in accordance with an alternative embodiment of the present disclosure.

8 is a phase tracking reference signal pattern (5) in accordance with an alternative embodiment of the present disclosure.

9 is a phase tracking reference signal pattern (six) in accordance with an alternative embodiment of the present disclosure.

10 is a phase tracking reference signal pattern (7) in accordance with an alternative embodiment of the present disclosure.

11 is a phase tracking reference signal pattern (8) in accordance with an alternative embodiment of the present disclosure.

12 is a phase tracking reference signal pattern (9) in accordance with an alternative embodiment of the present disclosure.

13 is a phase tracking reference signal pattern (X) in accordance with an alternative embodiment of the present disclosure.

FIG. 14 is a structural block diagram of a transmitting apparatus of a phase tracking reference signal according to an embodiment of the present disclosure.

15 is a structural block diagram of a receiving apparatus of a phase tracking reference signal according to an embodiment of the present disclosure.

16 is a schematic diagram of a hardware structure of a device according to an embodiment of the present disclosure.

17 is a schematic diagram of another hardware structure of a device in accordance with an embodiment of the present disclosure.

Detailed ways

The present disclosure will be hereinafter described with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second", and the like in the specification and claims of the present disclosure are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

Example 1

A method for transmitting a phase tracking reference signal is provided in the embodiment of the present disclosure. FIG. 1 is a flowchart of a method for transmitting a phase tracking reference signal according to an embodiment of the present disclosure. As shown in FIG. 1, the flow includes S102.

In S102, the first transmission node transmits a phase tracking reference signal.

The frequency domain pattern of the phase tracking reference signal includes at least one of: a location of a physical resource block in which the phase tracking reference signal is located and a position of the phase tracking reference signal in one or more subcarriers within one physical resource block.

Optionally, in this embodiment, the foregoing first transit node includes but is not limited to: a base station or a terminal.

The first transmission node sends the phase tracking reference signal by using the foregoing S102, wherein the frequency domain pattern of the phase tracking reference signal includes at least one of: a location of the physical resource block where the phase tracking reference signal is located and the phase tracking reference signal The location of one or more subcarriers within a physical resource block. That is, the first transmission node configures the position of the physical resource block where the phase tracking reference signal is located and the position of the subcarrier, and does not target the phase tracking reference signal for one port every N (N and phase tracking reference signals The frequency domain density correlation) physical resource block PRB is configured with one subcarrier position, thereby solving the problem that the distributed phase tracking reference signal cannot effectively solve the inter-subcarrier interference in the related art, and the inter-subcarrier interference can be effectively avoided.

In an optional implementation manner, the foregoing frequency domain pattern is predefined by the first transmission node or configured by Radio Resource Control (RRC) signaling.

Optionally, before the first transmission node sends the phase tracking reference signal, the following S11 is further included.

In S11, the first transmission node configures a frequency domain pattern of the phase tracking reference signal.

Optionally, the first transmission node configuring the frequency domain pattern of the phase tracking reference signal includes: configuring, by the first transmission node, a physical resource block where the starting position of the physical resource block where the phase tracking reference signal is located is the first physical resource block of the allocated bandwidth .

Optionally, the location of the physical resource block where the phase tracking reference signal is located is determined by using at least one of the following parameters: a Cell Radio Network Temporary Identifier (C-RNTI), and a cell identifier (Cell Identification, CELL) -ID) and the identifier used for sequence initialization.

Optionally, the position of the phase tracking reference signal in one physical resource block is determined by parameters of at least one of: C-RNTI, CELL-ID, identifier for sequence initialization, and demodulation reference signal. (Demodulation reference signal, referred to as DMRS) port number.

In an optional implementation manner, the first transmission node configuring the frequency domain pattern of the phase tracking reference signal includes S21.

In S21, the first transmission node configures a start position of the plurality of subcarriers in the one physical resource block of the phase tracking reference signal to be the lowest sequence number of subcarriers.

Optionally, the first transmitting node indicates that the phase tracking reference signal is sent according to the frequency domain pattern by transmitting at least one of the following signaling: radio resource control RRC signaling, media access control unit (Media Access Control Control Element (MAC CE) signaling and Downlink Control information (DCI) signaling.

In an optional implementation manner, the foregoing first transmitting node indicates the number of subcarriers that the phase tracking reference signal transmits in one physical resource block by transmitting at least one of the following signaling: radio resource control signaling, Media access control unit signaling and downlink control information signaling.

Optionally, the number of subcarriers occupied by the DMRS group of the one or more demodulation reference signals sent by the first transmission node is the maximum number of subcarriers sent by the phase tracking reference signal in one physical resource block.

Optionally, the first transmitting node may indicate the type of the frequency domain pattern and/or the content included in the frequency domain pattern according to the configured port number of the demodulation reference signal; or the first transmission node according to the configured solution The sequence of the tone reference signal indicates the type of the frequency domain pattern and/or the content included in the frequency domain pattern; or the first transmission node indicates the type of the frequency domain pattern and/or the frequency by the type of the demodulation reference signal The content included in the domain pattern.

The first transmission node indicates the type of the frequency domain pattern and/or the content included in the frequency domain pattern, and the problem that the inter-subcarrier interference cannot be effectively solved by configuring the distributed phase tracking reference signal in the related art may be solved. Effectively avoid interference between subcarriers.

Optionally, the type of the frequency domain pattern includes: a distributed frequency domain pattern and a centralized frequency domain pattern, wherein the type of the frequency domain pattern is selected by at least one of the following: the frequency domain pattern and the first a first correspondence between a threshold of a frequency domain segment configured by the transmission node and a second correspondence between a threshold of the interval between the frequency domain pattern and the subcarrier configured by the first transmission node.

Optionally, the foregoing first correspondence relationship and/or the second correspondence relationship are predefined by the first transmission node or notified by sending a radio resource control RRC signaling.

In an optional implementation manner, the first transmitting node configures different physical resource block locations for the phase tracking reference signal at different times.

Optionally, the first transmitting node determines a physical resource block location of the phase tracking reference signal according to a frequency domain resource location allocated to the second transmitting node.

Optionally, the physical resource block location of the phase tracking reference signal and the bandwidth allocated by the first transmission node have a third correspondence. The third correspondence may be configured to configure a physical resource block position of the phase tracking reference signal as an intermediate position of a bandwidth allocated by the first transmission node to the second transmission node.

In an optional implementation manner, the foregoing first transmitting node may determine at least one of the following parameters of the phase tracking reference signal according to the capability of the second transmitting node: a physical resource block location, a number of subcarriers within one physical resource block, and The location of the subcarrier within a physical resource block.

In the embodiment, a method for receiving a phase tracking reference signal is also provided. FIG. 2 is a flowchart of a method for receiving a phase tracking reference signal according to an embodiment of the present disclosure. As shown in FIG. 2, the flow includes S202.

In S202, the second transmission node receives the phase tracking reference signal sent by the first transmission node.

The frequency domain pattern of the phase tracking reference signal includes at least one of: a location of the physical resource block in which the phase tracking reference signal is located and a position of the phase tracking reference signal in one or more subcarriers within one physical resource block.

Optionally, in this embodiment, the foregoing second transmission node includes but is not limited to: a base station or a terminal.

The second transmission node receives the frequency domain pattern of the phase tracking reference signal sent by the first transmission node, where the frequency domain pattern includes at least one of: a location of the physical resource block where the phase tracking reference signal is located and the phase Tracking the position of one or more subcarriers within a physical resource block of a reference signal. That is, the first transmission node configures the position of the physical resource block where the phase tracking reference signal is located and the position of the subcarrier, and does not target the phase tracking reference signal for one port every N (N and phase tracking reference signals The frequency domain density correlation) physical resource block PRB is configured with one subcarrier position, thereby solving the problem that the distributed phase tracking reference signal cannot effectively solve the inter-subcarrier interference in the related art, and the inter-subcarrier interference can be effectively avoided.

Optionally, the foregoing frequency domain pattern is predefined by the first transmission node or configured by radio resource control signaling.

In an optional implementation manner, the location of the physical resource block where the phase tracking reference signal is located is determined by using at least one of the following parameters: a cell radio network temporary identifier, a cell identifier, and an identifier for sequence initialization; and the phase tracking reference signal The location of one or more subcarriers within a physical resource block is determined by parameters of at least one of: a cell radio network temporary identity, a cell identity, an identity for sequence initialization, and a port number of a demodulation reference signal.

The present embodiment will be exemplified below in conjunction with an alternative embodiment.

It should be noted that, in the following optional embodiments, the first transmission node is described by taking a base station as an example, and the second transmission node is described by taking a terminal as an example.

Alternative embodiment 1

The base station indicates, by signaling, a frequency domain pattern of the phase tracking reference signal, where the frequency domain pattern is the location of the physical resource block where the phase tracking reference signal is located and the number and location of the subcarriers of the phase tracking reference signal port in one physical resource block. Mapping relationship.

The configuration signaling indicates whether the phase tracking reference signal is configured with a distributed pattern or a centralized pattern. The centralized pattern can better overcome the influence of inter-subcarrier interference. The configuration signaling may be RRC signaling or MAC CE signaling or DCI signaling, and the signaling is 1 bit information, which mainly indicates the enabling state of the centralized phase tracking reference signal.

In the case where the subcarrier spacing is the same, as the frequency increases, the interference between subcarriers usually becomes more serious. Similarly, in the case where the frequency domain segments are the same, as the subcarrier spacing decreases, the inter-subcarrier interference also becomes more serious. Therefore, it is necessary to configure a centralized phase tracking reference signal that can solve the inter-subcarrier interference problem.

The centralized phase tracking reference signal is correlated with the frequency domain segment, or the centralized phase tracking reference information is correlated with the subcarrier spacing. For the case where the subcarrier spacing is the same, the centralized phase tracking reference signal is configured in the higher frequency domain segment. For example, for a frequency of 10 GHz, since the frequency domain segment is not very high, the inter-subcarrier interference situation is not very serious, and a distributed phase tracking reference signal can be configured at this time. For a frequency of 100 GHz or higher, at this time, since the frequency domain segment is high, inter-subcarrier interference may have a large influence, and a centralized phase tracking reference signal may be configured. Or for frequency domain segments with the same frequency, when the subcarrier spacing is small, it is more susceptible to interference between subcarriers. At this time, a centralized phase tracking reference signal should be configured; and when the subcarrier spacing is large, it is received at this time. The effect of inter-subcarrier interference is relatively small, and a distributed phase tracking reference signal can be configured; the pattern of the centralized phase tracking reference signal is shown in FIG.

Alternative embodiment 2

The frequency domain location of the centralized phase tracking reference signal is indicated by at least one of the following: C-RNTI, ID for sequence initialization, CELL-ID, and associated DMRS port number. In Long Term Evolution (LTE), the ID used for sequence initialization is represented by SCID. The SCIDs described below all represent an ID for sequence initialization.

The frequency domain position of the phase tracking reference signal is mainly reflected in the resource block (RB) position where the phase tracking reference signal PTRS is located or the subcarrier position where the phase tracking reference signal PTRS is located.

In a Multiple User Multiple Input and Multiple Output (MU-MIMO) scenario, phase tracking reference signals between different UEs may be interfered if configured in the same subcarrier position. Phase tracking reference signals, this effect also exists, therefore, in the MU-MIMO scenario, orthogonal centralized phase tracking reference signals can be configured to avoid interference of reference signals between multiple users.

When the orthogonality of the centralized phase tracking reference signal between multiple users is not configured, in order to avoid interference between reference signals between multiple users, C-RNTI can be used to distinguish the RB level of the phase tracking reference signal between different users. . For example, for a scenario of two users, if the phase tracking reference signal between two users is not distinguished, it is easy for two users to have phase tracking reference signals disposed in the same frequency domain position, thereby causing the two users. Interference between reference signals. The centralized phase tracking reference signal occupies more subcarriers in one PRB than the distributed phase tracking reference signal, so the frequency domain location should be differentiated for different users from the PRB level, as shown in Figure 4. According to the User Equipment-ID (UE-ID) (C-RNTI), the phase tracking reference signals of different users in the MU-MIMO scenario are configured on different RBs. Since the block size of the phase tracking reference signal configured by each user in a certain PRB may be different, that is, UE1 may configure two subcarriers for one phase tracking reference signal, and UE2 configures four subcarriers for one phase tracking reference. Signal, so according to the C-RNTI, the phase tracking reference signal of UE1 is configured to PRB0, and the phase tracking reference signal of UE2 is configured to PRB1.

Interference from the phase tracking reference signal may also occur from phase tracking reference signals from different base station configurations. Similarly, the phase tracking reference signals transmitted by different base stations can be configured on different PRBs according to different CELL-IDs.

For the configuration of the phase tracking reference signals for different subcarrier positions within one PRB, it is also necessary to distinguish between different base stations or different users.

Taking FIG. 4 as an example, phase tracking reference signals for different UEs are configured on different PRBs according to different UE-IDs. The phase tracking reference signals of different base stations can be configured on different subcarriers of the same PRB. As shown in FIG. 5, two transmission reception points (TRPs) are TRP1 and TRP2, respectively. The phase tracking reference signals from the two base station configurations are configured to different subcarrier positions of the same PRB according to different CELL-IDs. The phase tracking reference signal of base station 1 (e.g., TRP1 in Fig. 5) is configured to the position of subcarrier 0 and subcarrier 1 of the PRB, and the phase tracking reference signal of base station 2 (e.g., TRP2 in Fig. 5) is configured to subcarrier 6 and sub The location of carrier 7. In FIG. 4, the phase tracking reference signals of different UEs are configured to different PRBs according to the UE-ID. In FIG. 5, the phase tracking reference signals from different base stations are configured to different children of the same PRB by using different CELL-IDs. On the carrier, this avoids interference between phase tracking reference signals from different users and different base stations.

Similarly, if the phase tracking reference signals from different base stations are placed in different PRB positions by using the CELL-ID configuration described above, the phase of different users is placed in different subcarrier positions in the same PRB by using the UE-ID configuration. Tracking the reference signal also avoids interference between phase tracking reference signals from different base stations and different users.

Since the centralized phase tracking reference signal itself is better for coping with inter-subcarrier interference, and because the centralized phase tracking reference signal occupies different numbers of subcarriers in one PRB, it may appear at a certain base station. A centralized phase tracking reference signal sent by a user occupies a large number of subcarriers in a PRB. Therefore, in this scenario, parameters such as CELL-ID or UE-ID or SCID cannot be used in one PRB. Avoid the function of interference between phase tracking reference signals. Optionally, the DMRS from different base stations does not meet the Quasi-co-location (QCL) relationship. Therefore, the phase tracking reference signals configured by different base stations are associated with different DMRS groups, so The CELL-ID is used to avoid the interference of the phase tracking reference signal, and the subcarrier positions of the different phase tracking reference signals can be distinguished in the frequency domain by using only different DMRS port numbers, as shown in Figure 6, the two transmission receiving points TRP1 With TRP2, the PTRS of TRP1 is configured at the port number p0 and the port number p1 of the DMRS, and the PTRS of the TRP2 is configured at the position of the port number p2 and the port number p3 of the DMRS, that is, two base stations (such as TRP1 in FIG. 6). TRP2) The subcarrier positions of the respective PTRSs can be distinguished in the frequency domain using only different DMRS port numbers.

Or for the DMRS group of different base stations in which the QCL relationship exists, the configured phase tracking reference signal is configured with a large block centralized phase tracking reference signal due to the inter-subcarrier interference relationship, and can use (UE-ID)+(CELL-ID) ) The way to perform PRB level configuration. As shown in FIG. 7, the base station 1 (TRP1 in FIG. 7) configures phase tracking reference signals transmitted by UE1 and UE2 on PRB0 and PRB1, respectively, and base station 2 (TRP2 in FIG. 7) performs phase tracking on UE1 and UE2. The reference signals are respectively arranged on PRB2 and PRB3. The distinction between SCIDs is similar to the way CELL-IDs are distinguished.

Alternative embodiment 3

A plurality of levels of centralized phase tracking reference signals are configured, wherein the set size of the phase tracking reference signals is related to a frequency domain segment or a subcarrier spacing or a combination of the two.

The set size refers to the number of subcarriers occupied by the phase tracking reference signal of the same port in one physical resource block. It is assumed that the maximum value of the block of the centralized phase tracking reference signal (ie, the size of the centralized phase tracking reference signal set) is X. Different frequency domain segments can be configured with different block sizes due to the different severity of inter-subcarrier interference. Phase tracking reference signal. The thresholds of the M frequency domain points are designed, and the frequency domain segments between the two frequency domain points correspond to phase tracking reference signals of different block sizes. As the frequency increases, the block of the centralized phase tracking reference signal is larger; as the frequency decreases, the block of the centralized phase tracking reference signal is smaller, as shown in Table 1.

Table 1 Correspondence between phase tracking reference signal set size and frequency domain segment

频域段Frequency domain	相位追踪参考信号集合大小Phase tracking reference signal set size
f＜Fthr1f<Fthr1	11
Fthr1≤f≤Fthr2Fthr1≤f≤Fthr2	22
…...	…...
f≥Fthrmf≥Fthrm	XX

In Table 1, f denotes a frequency, Fthr1, Fthr2, ..., Fthrm is a threshold of the set M frequency domain points, and 1-X denotes a phase tracking reference signal set size (block size), respectively.

At the same time, the set size of the phase tracking reference signal also has a certain relationship with the subcarrier spacing. For the same frequency domain segment, different subcarrier spacings may have different inter-subcarrier interference effects. When the subcarrier spacing is small (for example, a subcarrier spacing of 15 kHz), the inter-subcarrier interference is relatively large, and when the subcarrier spacing is large (for example, a subcarrier spacing of 120 kHz), the influence of inter-subcarrier interference is relatively small. . As shown in Table 2, different sets of phase tracking reference signals can be configured for different subcarrier spacings.

Table 2 Correspondence between phase tracking reference signal set size and frequency domain segment

频域段Frequency domain	相位追踪参考信号集合大小Phase tracking reference signal set size
sc＜SCthr1Sc<SCthr1	YY
SCthr1≤sc≤SCthr2SCthr1≤sc≤SCthr2	Y-1Y-1
…...	…...
sc≥SCthrmSc≥SCthrm	11

In Table 2, sc denotes a subcarrier spacing, SCthr1, SCthr2, ..., SCthrm is a threshold of the set m subcarriers, and 1-Y denotes a set size of the phase tracking reference signals, respectively.

The above two tables may be used alone or in combination according to certain relationships.

Alternative embodiment 4

The set size of the phase tracking reference signal and the frequency domain position of the phase tracking reference signal within the set are related to the type of demodulation reference signal DMRS. The type of the demodulation reference signal is a different pattern. For example, the current DMRS supports two types: type1 and type2.

There is a certain correspondence between the phase tracking reference signal and the demodulation reference signal, that is, the configuration between the demodulation reference signal DMRS port or the port set or the demodulation reference signal port set having the quasi-co-located QCL relationship is the same. For different types of demodulation reference signals, the set size of the phase tracking reference signals and the position of the phase tracking reference signals within the set may also be different.

For example, for the downlink type 2 demodulation reference signal, the demodulation reference signal ports p0 and p1 shown in FIG. 8 are the same demodulation reference signal port set (DMRS group). If the centralized phase tracking reference signal set size is set to 2 at this time, that is, two phase frequency positions are arranged in one physical resource block (PRB) to place the phase tracking reference signal, so the phase tracking reference signal pattern at this time is as follows. As shown in FIG. 8, in FIG. 8, the phase tracking reference signal PTRS set size is 2, and two demodulation reference signals DMRS ports p0 and p1 are configured to place the PTRS in the physical resource block PRB shown in FIG.

For the type 1 demodulation reference signal, as shown in FIG. 9, the demodulation reference signal port p0/p1 occupying the first subcarrier position and the p2/p3 occupying the second subcarrier position are two different demodulation reference signals. Port group (DMRS group). If the two DMRS groups meet the QCL relationship at this time, that is, the two DMRS groups share a PTRS (phase tracking reference signal) port, if a centralized phase tracking reference signal (localized pattern) is configured, the same can be used. Implementing to configure two adjacent subcarriers (ie, the first subcarrier configured with DRMS port p0/p1 and the second subcarrier configured with DMRS port p2/p3) as a centralized phase tracking reference signal, and The collection size is 2. However, if the two DMRS groups do not satisfy the QCL relationship, that is, the two DMRS groups cannot share the same PTRS port, that is, the PTRS configured for the DMRS port p0/p1 cannot be placed on the subcarrier where the DMRS port p2/p3 is located, so this If a centralized phase tracking reference signal is configured and the number of phase tracking reference signals (or chunks) is 2, as shown in FIG. 9, the subcarrier position where the DMRS port p0/p1 is located can be located. Configure two phase tracking reference signals.

For the uplink type 2 demodulation reference signal, for the case where there is no DMRS group, the PTRS corresponding to the DMRS port p0 cannot be configured on the subcarrier where p1 is located, so if a centralized phase tracking reference signal needs to be configured, it needs to be more The phase tracking reference signals are arranged on non-adjacent subcarriers.

Optionally, for the type 1 structure and the uplink type 2 DMRS, multiple PTRSs configured for the same DMRS port or DMRS group cannot be placed on adjacent subcarriers, so The DMRS does not support the configuration of the centralized phase tracking reference signal. For the same reason, the DMRS of the type 1 pattern supports up to 8-port DMRS, while the type 2 DMRS supports the maximum 12-port DMRS, so when the number of DMRS ports is greater than 8 ports At this time, the type 2 DMRS is configured, and the centralized phase tracking reference signal is not supported. The sequence of the same two types of DMRS is different, and the lengths of the two sequences are different, so the enable of the centralized phase tracking reference signal can be indicated according to the difference between the two sequences. Therefore, the configuration of different types and/or contents of the PTRS may be indicated according to the type of the configured DMRS or the number of ports of the DMRS or the sequence of the DMRS.

Optionally, when the inter-subcarrier interference in the communication system is large, the type 2 DMRS is configured, and the corresponding centralized phase tracking reference signal is configured for the type 2 DMRS.

Since one PTRS port corresponds to one DMRS group or two DMRS groups with QCL relationship, the number of subcarriers occupied by one PTRS port in one PRB needs to be within the DMRS group or two DMRS groups with QCL relationship. The number of ports is related to the number of frequency domain subcarriers occupied. That is, when one PTRS port corresponds to one DMRS group, the number of subcarriers that can be allocated in one PRB of the PTRS port is the number of subcarriers occupied by all DMRS port ports in the DMRS group. Similarly, when one PTRS port corresponds to two DMRS groups with QCL relationship, the maximum number of allocated subcarriers in one PRB of one PTRS port is the number of subcarriers occupied by all DMRS ports in the two DMRS groups. Therefore, the number of ports of the DMRS or the number of subcarriers occupied by the port determines the maximum number of subcarriers of the PTRS in one PRB and the number and location of PRBs that allocate PTRS in the entire bandwidth.

Alternative embodiment 5

The frequency domain location of the centralized phase tracking reference signal is fixed on the first RB of the allocated bandwidth and occupies the lowest number of X subcarriers within the PRB, where X is the size of the block of the centralized phase tracking reference signal.

It is assumed that the block size of the centralized phase tracking reference signal is 2 at this time, that is, one PTRS port is configured on two subcarriers in one PRB. The two subcarriers are configured on the two lowest sequence subcarriers corresponding to the DMRS ports in the associated DMRS group corresponding to the PTRS. As shown in Figure 8. At this time, the DMRS ports p0 and p1 are in a QCL relationship, and the configured PTRS corresponds to the DMRS group. The positions of subcarrier 0 and subcarrier 1 can be configured for PTRS occupying two subcarriers. For the DMRS configuration of type1, the PTRS corresponding to the DMRS group can be configured at the positions of subcarrier 0 and subcarrier 2, as shown in FIG. 9; and for the DMRS of the uplink type2 structure, and there is no DMRS port p0 and port p1. For the QCL relation, the PTRS corresponding to the DMRS port p0 needs to be placed at the positions of the subcarrier 0 and the subcarrier 6, as shown in FIG.

Optionally, if the PTRS is placed on the subcarrier with the highest sequence number, the principle is the same. Optionally, the PTRS is placed on the PRB with the highest sequence number or on a predefined PRB obtained according to the allocated bandwidth. The principle is the same. For example, the bandwidth allocated by the base station is 100 PRBs, and the starting PRB position of the predefined centralized phase tracking reference signal is the intermediate position, that is, for the bandwidth of the P PRBs, the selected position is

Optionally, according to the number of subcarriers occupied by one PTRS port in each PRB of the phase tracking reference signal configured by the base station, and the bandwidth allocated to the user, the total number of PRBs occupied by the PTRS port may be determined, so The PRB position of the middle portion of the allocated bandwidth of the user is configured to the corresponding PRB according to the frequency domain density of the set PTRS.

Alternative embodiment 6

The physical resource block positions of the phase tracking reference signals configured by the base station on different time domain resources and/or frequency domain resources are different.

When the base station is configured with a centralized phase tracking reference signal, especially when the phase tracking reference signal of one port is configured to occupy a large number of subcarriers in one physical resource block, different base stations or different base stations may not be performed in one physical resource block. The location of the PTRS of the terminal is different, which may cause interference between PTRSs. Therefore, the same terminal needs to configure different physical resource block locations through the base station to avoid interference between PTRSs. The PTRSs configured by the base station for the same terminal are configured at different physical resource block PRB positions at different times. For example, as shown in FIG. 11, for the terminal 1, at different times, the PRB position of the PTRS of the terminal 1 is different. In the first subframe, the PTRS of the terminal 1 is placed at the position of the PRB0, In the second subframe, the PTRS of the terminal 1 is placed at the position of the PRB1. In order to avoid interference caused by PTRS between different base stations or different terminals, the PRB positions of the PTRS allocated by the base station to different terminals are different at different times, or the physical resource block PRB positions of the PTRS allocated by different base stations to the same terminal are Different moments are different. For example, the physical resource block PRB position of the PTRS allocated by the base station to the terminal 1 is as shown in FIG. 11, and the PTRS of the terminal 1 is placed at the position of the PRB1 by the base station in the second subframe. The physical resource block location of the PTRS allocated by the base station to the terminal 2 is as shown in FIG. 12. In the second subframe, the PTRS of the terminal 2 is configured by the base station to the PRB2, which effectively avoids interference between different PTRSs.

The base station needs to allocate the location of the physical resource block where the PTRS is located according to the frequency domain location occupied by the terminal. If the base station is configured with 8 physical resources of the PRB, according to the physical resource block position of the previously reserved PTRS, for example, it is assumed that one PTRS is placed every 2 PRBs at this time, and if the default initial position of the PTRS is the first PRB, The PTRS is configured to place one PTRS every 2 PRBs starting from PRB0. If the bandwidth used by the terminal (BWP) is some intermediate PRBs, for example, 4th to 7th PRBs, the bandwidth used in the terminal is configured. The external PTRS cannot play the role of compensating for the phase noise of the terminal, and causes the physical resource block positions of the corresponding PTRS to be different due to the different frequency domain positions of the bandwidth used by the terminal. Therefore, the base station is required to determine the physical resource block location of the PTRS configured for the terminal according to the frequency domain location used by the terminal. As shown in FIG. 13, the bandwidth used by the terminal is the fourth to seventh PRBs, and the base station determines, according to the frequency domain location used by the terminal, that the physical resource block locations of the PTRS configured for the terminal are PRB3 and PRB5.

Alternative embodiment 7

The base station determines one of the following parameters of the phase tracking reference signal according to the terminal capability: the physical resource block location and the number and location of subcarriers within one physical resource block.

The capabilities of each terminal are different, and the configurations of supported PTRS are also different. For example, the terminal 1 cannot support more than two subcarriers for the same PTRS port in one PRB. Therefore, only one subcarrier or two subcarriers can be configured for the terminal 1 at this time. Therefore, the number of physical resource blocks of the terminal is also determined. And if there are some terminals that cannot perform excessive RRC signaling configuration, only the physical resource block locations of the predefined PTRS can be used.

Therefore, the base station needs to select the type of the PTRS according to the capabilities of different terminals, or the configuration manner of selecting the number and location of the carriers and the location of the physical resource blocks.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware. Based on such understanding, the technical solution of the present disclosure may be embodied in the form of a software product stored in a storage medium (such as a ROM/RAM, a magnetic disk, an optical disk), including a plurality of instructions for making a terminal. The device (which may be a cell phone, computer, server, or network device, etc.) performs the methods described in various embodiments of the present disclosure.

Example 2

In the embodiment, a reference signal configuration device is also provided, which is used to implement the above-mentioned embodiments and optional embodiments, and has not been described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function.

FIG. 14 is a structural block diagram of a transmitting apparatus of a phase tracking reference signal according to an embodiment of the present disclosure. As shown in FIG. 14, the apparatus includes a transmitting module 142.

The transmitting module 142 is configured to transmit a phase tracking reference signal.

The frequency domain pattern of the phase tracking reference signal includes at least one of: a location of the physical resource block where the phase tracking reference signal is located and a position of the phase tracking reference signal in one or more subcarriers within one physical resource block.

The transmitting module 142 in the first transmitting node sends a phase tracking reference signal by using the apparatus shown in FIG. 14; wherein the frequency domain pattern of the phase tracking reference signal includes at least one of: a location of the physical resource block where the phase tracking reference signal is located And the phase tracking reference signal is located at one or more subcarriers within one physical resource block. That is, the first transmission node configures the position of the physical resource block where the phase tracking reference signal is located and the position of the subcarrier, and does not target the phase tracking reference signal for one port every N (N and phase tracking reference signals The frequency domain density correlation) physical resource block PRB is configured with one subcarrier position, thereby solving the problem that the distributed phase tracking reference signal cannot effectively solve the inter-subcarrier interference in the related art, and the inter-subcarrier interference can be effectively avoided.

Optionally, the frequency domain pattern is predefined by the first transmission node or configured by radio resource control signaling.

A receiving device for a phase tracking reference signal is also provided in this embodiment. As shown in FIG. 15, the device includes a receiving module 152.

The receiving module 152 is configured to receive the phase tracking reference signal transmitted by the first transmitting node.

The receiving module 152 of the second transmitting node receives the frequency domain pattern of the phase tracking reference signal sent by the first transmitting node, where the frequency domain pattern includes at least one of the following: the phase tracking reference signal is located The location of the physical resource block and the location of the phase tracking reference signal in one or more subcarriers within one physical resource block. That is, the first transmission node configures the position of the physical resource block where the phase tracking reference signal is located and the position of the subcarrier, and does not target the phase tracking reference signal for one port every N (N and phase tracking reference signals The frequency domain density correlation) physical resource block PRB is configured with one subcarrier position, thereby solving the problem that the distributed phase tracking reference signal cannot effectively solve the inter-subcarrier interference in the related art, and the inter-subcarrier interference can be effectively avoided.

It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above multiple modules are The form of any combination is located in a different processor.

Example 3

The embodiment of the present disclosure further provides a computer readable storage medium having stored therein a computer program, wherein the computer program is configured to execute the steps of any one of the method embodiments described above.

Alternatively, in the present embodiment, the above storage medium may be set to store a computer program for executing S1.

In S1, the first transmission node sends a phase tracking reference signal; wherein the frequency domain pattern of the phase tracking reference signal comprises at least one of: a location of the physical resource block where the phase tracking reference signal is located and the phase tracking reference The location of a signal in one or more subcarriers within a physical resource block.

Optionally, the computer readable storage medium is further arranged to store a computer program for performing the following S2.

In S2, the second transmission node receives the phase tracking reference signal sent by the first transmission node, where the frequency domain pattern of the phase tracking reference signal includes at least one of: a location of the physical resource block where the phase tracking reference signal is located And the phase tracking reference signal is located at one or more subcarriers within one physical resource block.

Optionally, in this embodiment, the computer readable storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a Random Access Memory (Random Access Memory). A variety of media that can store computer programs, such as RAM), removable hard drives, disks, or optical disks.

Embodiments of the present disclosure also provide an apparatus. FIG. 16 is a schematic diagram showing the hardware structure of the device according to the embodiment. As shown in FIG. 16, the device includes a memory 310 and at least one processor 320. The structure of the device is illustrated by taking a processor 320 as an example. A memory program is stored in the memory 310, the processor 320 being arranged to run a computer program to perform the steps in any of the method embodiments described above. The memory 310 and the processor 320 may be connected by a bus or other means, as exemplified by a bus connection in FIG.

Optionally, FIG. 17 is a schematic diagram of another hardware structure of the device provided in this embodiment. As shown in FIG. 17, the device may include an input device 330 and an output device 340 in addition to the memory 310 and the processor 320. The input device 330 and the output device 340 are connected to the processor 320. The memory 310, the processor 320, the input device 330, and the output device 340 may be connected by a bus or other manner, and the bus connection is taken as an example in FIG.

Input device 330 can receive input numeric or character information and generate key signal inputs associated with user settings and function controls of the device. Output device 340 can include a display device such as a display screen.

The memory 310 may include a storage program area and an storage data area, wherein the storage program area may store an operating system, an application required for at least one function; the storage data area may store data created according to usage of the device, and the like. Moreover, memory 310 can include volatile memory such as random access memory RAM, and can also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state memory device.

Memory 310 can be a non-transitory computer storage medium or a transitory computer storage medium. The non-transitory computer storage medium, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, memory 310 can include memory remotely located relative to processor 320, which can be connected to the device over a network. The above network may include the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

Optionally, in the embodiment, the processor 320 may be configured to execute S1 by a computer program.

In S1, the first transmission node transmits a phase tracking reference signal. The frequency domain pattern of the phase tracking reference signal includes at least one of: a location of a physical resource block where the phase tracking reference signal is located, and a location of the phase tracking reference signal in one or more subcarriers within a physical resource block. .

Optionally, the processor 320 is further configured to store a computer program for executing S2.

In S2, the second transmission node receives the phase tracking reference signal transmitted by the first transmission node. The frequency domain pattern of the phase tracking reference signal includes at least one of: a location of a physical resource block where the phase tracking reference signal is located, and a location of the phase tracking reference signal in one or more subcarriers within a physical resource block. .

The device in this embodiment may also include a communication device 350 that can transmit and/or receive information over a communication network.

For example, the examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

It will be apparent to those skilled in the art that each of the above-described modules or steps of the present disclosure can be implemented by a general-purpose computing device, which can be centralized on a single computing device or distributed across a network of multiple computing devices. on. Alternatively, they may be implemented by program code executable by a computing device such that they may be stored in a storage device by a computing device and, in some cases, may be executed in a different order than herein. The steps shown or described are either made separately into a plurality of integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. As such, the disclosure is not limited to any specific combination of hardware and software.

Claims

A method for transmitting a phase tracking reference signal includes:

The first transmission node sends a phase tracking reference signal;

The frequency domain pattern of the phase tracking reference signal includes at least one of: a location of a physical resource block where the phase tracking reference signal is located, and a location of at least one subcarrier of the phase tracking reference signal in a physical resource block. .
The method of claim 1 wherein the frequency domain pattern is predefined by the first transmission node or configured by radio resource control signaling.
The method according to claim 1, before the first transmission node sends the phase tracking reference signal, the method further includes:

The first transmission node configures a frequency domain pattern of the phase tracking reference signal.
The method of claim 3, wherein the first transmission node configuring the frequency domain pattern of the phase tracking reference signal comprises:

The first transmission node configures a starting position of the physical resource block where the phase tracking reference signal is located as a first physical resource block of the allocated bandwidth.
The method of claim 1, wherein the location of the physical resource block in which the phase tracking reference signal is located is determined by a parameter of at least one of:

Cell radio network temporary identity, cell identity, and identity for sequence initialization.
The method of claim 1, wherein the position of the at least one subcarrier of the phase tracking reference signal within one physical resource block is determined by a parameter of at least one of:

The cell radio network temporary identity, the cell identity, the identity used for sequence initialization, and the port number of the demodulation reference signal.
The method of claim 3, wherein the first transmission node configuring the frequency domain pattern of the phase tracking reference signal comprises:

The first transmission node configures a starting position of the plurality of subcarriers in the one physical resource block of the phase tracking reference signal to be the lowest sequence number of subcarriers.
The method of claim 1 further comprising:

The first transmitting node instructs the phase tracking reference signal to be sent according to the frequency domain pattern by transmitting at least one of the following signaling:

Radio resource control signaling, media access control unit signaling, and downlink control information signaling.
The method of claim 1 further comprising:

The first transmitting node indicates the number of subcarriers that the phase tracking reference signal transmits in one physical resource block by transmitting at least one of the following signaling:

Radio resource control signaling, media access control unit signaling, and downlink control information signaling.
The method according to claim 1, wherein the number of subcarriers occupied in the at least one demodulation reference signal group transmitted by the first transmission node is the largest sub-segment transmitted by the phase tracking reference signal in one physical resource block. Number of carriers.
The method of claim 1 further comprising:

The first transmitting node indicates the type of the frequency domain pattern and/or the content included in the frequency domain pattern according to the number of ports of the configured demodulation reference signal.
The method of claim 1 further comprising:

The first transmitting node indicates the type of the frequency domain pattern and/or the content included in the frequency domain pattern according to a sequence of configured demodulation reference signals.
The method of claim 1 further comprising:

The first transmitting node indicates the type of the frequency domain pattern and/or the content included in the frequency domain pattern according to the type of the configured demodulation reference signal.
The method of claim 1, wherein the type of the frequency domain pattern comprises: a distributed frequency domain pattern and a centralized frequency domain pattern, wherein the type of the frequency domain pattern is selected by at least one of the following information :

a first correspondence between the frequency domain pattern and a threshold of a frequency domain segment configured by the first transmission node, and a threshold between the frequency domain pattern and a spacing of subcarriers configured by the first transmission node The second correspondence.
The method of claim 14, wherein the first correspondence and/or the second correspondence are predefined by the first transmission node or by transmitting radio resource control signaling.
The method of claim 1 wherein said first transmitting node configures different physical resource block locations for said phase tracking reference signals at different times.
The method of claim 1, wherein the first transmission node determines a physical resource block location of the phase tracking reference signal based on a frequency domain resource location assigned to the second transmission node.
The method of claim 1, wherein the physical resource block location at which the phase tracking reference signal is located and the bandwidth allocated by the first transmission node have a third correspondence.
The method according to claim 18, wherein said third correspondence is a physical resource block position at which said phase tracking reference signal is located is configured as an intermediate position of a bandwidth allocated by said first transmission node to said second transmission node .
The method of claim 1 further comprising:

Determining, by the first transmission node, at least one of the following parameters of the phase tracking reference signal according to a capability of the second transmission node: a physical resource block location, a number of subcarriers within one physical resource block, and a physical resource block Subcarrier position.
A method for receiving a phase tracking reference signal includes:

The second transmission node receives the phase tracking reference signal sent by the first transmission node;

The frequency domain pattern of the phase tracking reference signal includes at least one of: a location of a physical resource block where the phase tracking reference signal is located, and a location of at least one subcarrier of the phase tracking reference signal in a physical resource block. .
The method of claim 21 wherein the frequency domain pattern is predefined by the first transmission node or configured by radio resource control signaling.
The method of claim 21, wherein the location of the physical resource block in which the phase tracking reference signal is located is determined by a parameter of at least one of:

Cell radio network temporary identity, cell identity, and identity for sequence initialization.
The method of claim 21, wherein the position of the phase tracking reference signal at least one subcarrier within one physical resource block is determined by a parameter of at least one of:

The cell radio network temporary identity, the cell identity, the identity used for sequence initialization, and the port number of the demodulation reference signal.
A transmitting device for a phase tracking reference signal is applied to a first transmission node, including:

a transmitting module configured to transmit a phase tracking reference signal;

The frequency domain pattern of the phase tracking reference signal includes at least one of: a location of a physical resource block where the phase tracking reference signal is located, and a location of at least one subcarrier of the phase tracking reference signal in a physical resource block. .
The apparatus of claim 25, wherein the frequency domain pattern is predefined by the first transmission node or configured by radio resource control signaling.
A receiving device for a phase tracking reference signal is applied to a second transmission node, including:

a receiving module, configured to receive a phase tracking reference signal sent by the first transmitting node;

The frequency domain pattern of the phase tracking reference signal includes at least one of: a location of a physical resource block where the phase tracking reference signal is located, and a location of at least one subcarrier of the phase tracking reference signal in a physical resource block. .
The apparatus of claim 27, wherein the frequency domain pattern is predefined by the first transmission node or configured by radio resource RRC signaling.
A computer readable storage medium storing a computer program, the computer program being arranged to perform the method of any one of claims 1 to 20 or claims 21 to 24 at runtime.
An apparatus comprising a memory and a processor, wherein the memory stores a computer program, the processor being arranged to execute the computer program to perform the ones of 1 to 20 or any one of claims 21 to 24 Methods.