Phase tracking reference signal transmission method, device, terminal, and network side device

Abstract

The present application discloses a phase tracking reference signal transmission method, an apparatus, a terminal, and a network side device, which belong to the field of communication technology. The phase tracking reference signal transmission method of an embodiment of the present application includes: a terminal determining transmission parameters of a PTRS; and the terminal transmitting the PTRS based on the transmission parameters, or the terminal receiving the PTRS based on the transmission parameters, the PTRS including at least one PTRS port, and the transmission parameters including a frequency domain resource offset of the PTRS port corresponding to a first DMRS port, and an EP between the PTRS port and a transmission channel. The PTRS port includes at least one of an RE ratio and a DMRS port associated with the PTRS port, wherein the first DMRS is a DMRS that employs a first FD-OCC sequence to perform port multiplexing within the same CDM group, the length of the first FD-OCC sequence is greater than 2, the transport channel includes a PDSCH or a PUSCH, the maximum number of data streams supported by the PDSCH is greater than 6, the maximum number of data streams supported by the PUSCH is greater than 4, and the DMRS port associated with the PTRS port is used for PUSCH transmission.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application claims priority from Chinese Patent Application No. 202310041751.7, filed in China on January 11, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of communications technology, and more particularly to a phase tracking reference signal transmission method, device, terminal, and network side device. [Background technology]

[0003] In high-frequency band communications such as millimeter waves, the hardware implementation of analog front-ends presents significant challenges. For example, crystal oscillators in high-frequency bands generate relatively large phase noise, which can destroy the orthogonality of OFDM (Orthogonal Frequency Division Multiplexing) symbol subcarriers. Therefore, related technologies introduce a phase-tracking reference signal (PTRS) to estimate phase noise, and the receiving end can suppress or remove the phase noise based on the PTRS estimation result.

[0004] Currently, in order to improve the overall throughput in a network, the number of cooperating users and the total number of data streams transmitted from Multiple-Input Multiple-Output (MIMO) need to be increased, thereby increasing the number of Demodulation Reference Signal (DMRS) ports and the maximum number of data streams of a data channel supported by each user. However, there is a close relationship between PTRS and DMRS, and there is no corresponding solution for how to transmit PTRS when the number of DMRS ports and the maximum number of data streams supported by a data channel increase, which affects the accuracy of phase noise estimation. Summary of the Invention [Problem to be solved by the invention]

[0005] The embodiments of the present application provide a phase tracking reference signal transmission method, device, terminal, and network side equipment, and provide a PTRS transmission method when the number of DMRS ports, the maximum number of data streams supported in a data channel, etc. increase, thereby ensuring the accuracy of phase noise estimation. [Means for solving the problem]

[0006] According to a first aspect, there is provided a method for transmitting a phase tracking reference signal, the method comprising: The terminal determines transmission parameters of a phase tracking reference signal (PTRS); The terminal transmits the PTRS based on the transmission parameters, or the terminal receives the PTRS based on the transmission parameters; wherein the PTRS includes at least one PTRS port, and the transmission parameters include at least one of a frequency domain resource offset of the PTRS port corresponding to a first DMRS port, an Energy Per Resource Element (EPRE) ratio between the PTRS port and a transmission channel, and a DMRS port associated with the PTRS port; The first DMRS is a DMRS that employs a first Frequency Domain Orthogonal Cover Code (FD-OCC) sequence to perform port multiplexing within the same Code Division Multiplexing (CDM) group, the length of the first FD-OCC sequence is greater than 2, the transport channel is a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Sharing Channel (PUSCH), the maximum number of data streams supported by the PDSCH is greater than 6, the maximum number of data streams supported by the PUSCH is greater than 4, and the DMRS port associated with the PTRS port is used for transmitting the PUSCH.

[0007] According to a second aspect, there is provided a phase tracking reference signal transmission apparatus, the apparatus comprising: a first determination module for determining transmission parameters of a phase tracking reference signal (PTRS); a first transmission module for transmitting the PTRS based on the transmission parameters or for receiving the PTRS based on the transmission parameters; wherein the PTRS includes at least one PTRS port, and the transmission parameters include at least one of a frequency domain resource offset of the PTRS port corresponding to a first demodulation reference signal DMRS port, an energy per resource element (EPRE) ratio between the PTRS port and a transmission channel, and a DMRS port associated with the PTRS port; The first DMRS is a DMRS that employs a first frequency-domain orthogonal cover code (FD-OCC) sequence to perform port multiplexing within the same code division multiplexing CDM group, the length of the first FD-OCC sequence is greater than 2, the transport channel includes a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), the maximum number of data streams supported by the PDSCH is greater than 6, the maximum number of data streams supported by the PUSCH is greater than 4, and the DMRS port associated with the PTRS port is used for transmitting the PUSCH.

[0008] According to a third aspect, there is provided a method of transmitting a phase tracking reference signal, the method comprising: The network side device determines transmission parameters of a phase tracking reference signal (PTRS); The network side device receives the PTRS based on the transmission parameters, or the network side device transmits the PTRS based on the transmission parameters; wherein the PTRS includes at least one PTRS port, and the transmission parameters include at least one of a frequency domain resource offset of the PTRS port corresponding to a first demodulation reference signal DMRS port, an energy per resource element (EPRE) ratio between the PTRS port and a transmission channel, and a DMRS port associated with the PTRS port; The first DMRS is a DMRS that employs a first frequency-domain orthogonal cover code (FD-OCC) sequence to perform port multiplexing within the same code division multiplexing CDM group, the length of the first FD-OCC sequence is greater than 2, the transport channel includes a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), the maximum number of data streams supported by the PDSCH is greater than 6, the maximum number of data streams supported by the PUSCH is greater than 4, and the DMRS port associated with the PTRS port is used for transmitting the PUSCH.

[0009] According to a fourth aspect, there is provided a phase tracking reference signal transmission apparatus, the apparatus comprising: a second determination module for determining transmission parameters of a phase tracking reference signal (PTRS); a second transmission module for receiving the PTRS based on the transmission parameters or transmitting the PTRS based on the transmission parameters; wherein the PTRS includes at least one PTRS port, and the transmission parameters include at least one of a frequency domain resource offset of the PTRS port corresponding to a first demodulation reference signal DMRS port, an energy per resource element (EPRE) ratio between the PTRS port and a transmission channel, and a DMRS port associated with the PTRS port; The first DMRS is a DMRS that employs a first frequency-domain orthogonal cover code (FD-OCC) sequence to perform port multiplexing within the same code division multiplexing CDM group, the length of the first FD-OCC sequence is greater than 2, the transport channel includes a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), the maximum number of data streams supported by the PDSCH is greater than 6, the maximum number of data streams supported by the PUSCH is greater than 4, and the DMRS port associated with the PTRS port is used for transmitting the PUSCH.

[0010] According to a fifth aspect, there is provided a terminal including a processor and a memory, the memory storing a program or instructions operable to run on the processor, the program or instructions being operable when executed by the processor to implement the steps of the method of the first aspect.

[0011] According to a sixth aspect, there is provided a terminal, the terminal including a processor and a communication interface, wherein the processor is used to determine transmission parameters of a phase tracking reference signal (PTRS), and the communication interface is used to transmit the PTRS based on the transmission parameters or receive the PTRS based on the transmission parameters, wherein the PTRS includes at least one PTRS port, and the transmission parameters include a frequency domain resource offset of the PTRS port corresponding to a first demodulation reference signal (DMRS) port, an energy per resource element (EPRE) ratio between the PTRS port and a transmission channel, and a frequency domain resource offset of the PTRS port corresponding to a first demodulation reference signal (DMRS) port. and a DMRS port associated with the PTRS port, wherein the first DMRS is a DMRS that employs a first frequency domain orthogonal cover code (FD-OCC) sequence to perform port multiplexing within the same code division multiplexing CDM group, the length of the first FD-OCC sequence is greater than 2, the transport channel includes a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), the maximum number of data streams supported by the PDSCH is greater than 6, the maximum number of data streams supported by the PUSCH is greater than 4, and the DMRS port associated with the PTRS port is used for transmitting the PUSCH.

[0012] According to a seventh aspect, there is provided a network side device, the network side device including a processor and a memory, the memory storing a program or instructions operable to run on the processor, the program or instructions, when executed by the processor, realizing the steps of the method according to the third aspect.

[0013] According to an eighth aspect, there is provided a network side device, the network side device including: a processor and a communication interface, wherein the processor is used to determine transmission parameters of a phase tracking reference signal (PTRS); the communication interface is used to receive the PTRS based on the transmission parameters; or to transmit the PTRS based on the transmission parameters, the PTRS including at least one PTRS port; and the transmission parameters include a frequency domain resource offset of the PTRS port corresponding to a first demodulation reference signal (DMRS) port; and an energy per resource element (EPRE) ratio between the PTRS port and a transmission channel. and a DMRS port associated with the PTRS port, wherein the first DMRS is a DMRS that employs a first frequency domain orthogonal cover code (FD-OCC) sequence to perform port multiplexing within the same code division multiplexing CDM group, the length of the first FD-OCC sequence is greater than 2, the transport channel includes a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), the maximum number of data streams supported by the PDSCH is greater than 6, the maximum number of data streams supported by the PUSCH is greater than 4, and the DMRS port associated with the PTRS port is used for transmitting the PUSCH.

[0014] According to a ninth aspect, there is provided a phase tracking reference signal transmission system, the phase tracking reference signal transmission system including a terminal and a network side device, the terminal being used to perform steps of the phase tracking reference signal transmission method described in the first aspect, and the network side device being used to perform steps of the phase tracking reference signal transmission method described in the third aspect.

[0015] According to a tenth aspect, there is provided a readable storage medium having a program or instructions stored thereon, the program or instructions performing the steps of the method according to the first aspect or performing the steps of the method according to the third aspect when executed by a processor.

[0016] According to an eleventh aspect, there is provided a chip, the chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor running a program or instructions and used to implement steps of the method according to the first aspect or steps of the method according to the third aspect.

[0017] According to a twelfth aspect, there is provided a computer program / program product, the computer program / program product being stored on a storage medium, the computer program / program product being executed by at least one processor to implement the steps of the method according to the first aspect or the steps of the method according to the third aspect. [Effects of the Invention]

[0018] In an embodiment of the present application, a terminal determines transmission parameters of a PTRS, and the terminal transmits the PTRS based on the transmission parameters, or the terminal receives the PTRS based on the transmission parameters, where the PTRS includes at least one PTRS port, and the transmission parameters include at least one of a frequency-domain resource offset of the PTRS port corresponding to a first DMRS port, an EPRE ratio between the PTRS port and a transport channel, and a DMRS port associated with the PTRS port, where the first DMRS is a DMRS that employs a first FD-OCC sequence for port multiplexing within the same CDM group, the length of the first FD-OCC sequence is greater than 2, the transport channel includes a PDSCH or a PUSCH, the maximum number of data streams supported by the PDSCH is greater than 6, the maximum number of data streams supported by the PUSCH is greater than 4, and the DMRS port associated with the PTRS port is used for PUSCH transmission. That is, the embodiments of the present application provide a PTRS transmission method when the number of DMRS ports, the maximum number of supported data streams in a data channel, etc. increases, thereby ensuring the accuracy of phase noise estimation. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a block diagram of a wireless communication system to which an embodiment of the present application can be applied. [Figure 2] 1 is a flowchart of a phase tracking reference signal transmission method according to an embodiment of the present application; [Figure 3] 4 is a flowchart of another phase tracking reference signal transmission method according to an embodiment of the present application; [Figure 4] 1 is a structural diagram of a phase tracking reference signal transmission device according to an embodiment of the present application; [Figure 5] FIG. 10 is a structural diagram of another phase tracking reference signal transmission device according to an embodiment of the present application; [Figure 6] 1 is a structural diagram of a communication device according to an embodiment of the present application; [Figure 7] FIG. 2 is a structural diagram of a terminal according to an embodiment of the present application; [Figure 8] FIG. 2 is a structural diagram of a network-side device according to an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0020] The following clearly describes the technical solutions in the embodiments of the present application, in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application fall within the scope of protection of the present application.

[0021] The terms "first," "second," etc. in the specification and claims of this application are intended to distinguish between similar objects and are not intended to describe a particular order or sequence. It should be understood that terms used in this manner are interchangeable where appropriate, so that the embodiments of this application may be performed in an order other than that illustrated or described herein. Furthermore, objects distinguished by "first" and "second" are generally of the same type and do not limit the number of objects; for example, the first object may be one or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the related objects before and after have an "or" relationship.

[0022] It should be noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be applied to other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-Carrier Frequency Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in the embodiments of the present application are always used interchangeably, and the described techniques may be used in the above-mentioned systems and radio technologies, or in other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description. However, these techniques may also be applied to systems other than NR systems, such as sixth generation (6G) systems. th It can also be applied to 6G (Generation, 6G) communication systems.

[0023] 1 shows a block diagram of a wireless communication system to which an embodiment of the present application can be applied. The wireless communication system includes a terminal 11 and a network side device 12. Here, the terminal 11 may be a mobile phone, a tablet personal computer, a laptop computer (also called a notebook computer), a personal digital assistant (PDA), a palmtop computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR) / virtual reality (VR) device, a robot, a wearable device, a vehicle user equipment (VUE), a pedestrian user equipment (PUE), a smart home (home devices with wireless communication capabilities, such as a refrigerator, a television, a washing machine, or furniture), a game console, a personal computer, a The network side device 12 may be a terminal side device such as a mobile phone (mobile phone, mobile computer, PC), a teller machine or a self-service machine, and the wearable device may be a smart watch, a smart wristband, a smart earphone, a smart glasses, a smart accessory (a smart bracelet, a smart hand chain, a smart ring, a smart necklace, a smart ankle bracelet, a smart anklet, etc.), a smart band, a smart clothing, etc. It should be noted that the terminal 11 in the embodiments of the present application is not limited to a specific type. The network side device 12 may include an access network device or a core network device. Here, the access network device may be referred to as a radio access network device, a radio access network (RAN), a radio access network function, or a radio access network unit.The access network equipment may include a base station, a Wireless Local Area Network (WLAN) access point, a WiFi node, etc., and the base station may be called a Node B, an evolved Node B (eNB), an access point, a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a home B node, a home evolved B node, a transmitting receiving point (TRP), or any other appropriate term in the art, and the base station is not limited to a specific technical term as long as the same technical effect is achieved. It should be noted that the embodiments of the present application only take base stations in an NR system as examples, and do not limit the specific type of base station.Core network devices include core network nodes, core network functions, mobility management entities (MMEs), access and mobility management functions (AMFs), session management functions (SMFs), user plane functions (UPFs), policy control functions (PCFs), policy and charging rules functions (PCRFs), edge application server discovery functions (EASDFs), unified data management (UDMs), unified data repository (UDRs), home subscriber servers (HSSs), centralized network configuration (CNCs), network repository functions (NRFs), network exposure functions (NEFs), local NEFs (or L-NEFs), binding support functions (BSFs), and application functions (Application Node Functions). It should be noted that the embodiments of the present application only take core network equipment in an NR system as an example, and do not limit the specific type of core network equipment.

[0024] For ease of understanding, the following describes some contents related to the embodiments of the present application.

[0025] One, DMRS.

[0026] 1) DMRS Overview.

[0027] In an NR system, DMRS is used for channel estimation. In Release 17 (Rel-17), the DMRS for the data channel is divided into DMRS configuration type 1 and DMRS configuration type 2 according to the type of DMRS, and both DMRS configuration types support single-symbol and dual-symbol structures. Here, the single-symbol structure of DMRS configuration type 1 supports up to four ports, and the dual-symbol structure supports up to eight ports. The single-symbol structure of DMRS configuration type 2 supports up to six ports, and the dual-symbol structure supports up to 12 ports. DMRS configuration type 1 supports two CDM groups, while DMRS configuration type 2 supports three CDM groups.

[0028] A specific resource mapping scheme for DMRS reference signals is as follows: JPEG2026504049000002.jpg4777, where k represents the DMRS frequency domain occupied location identifier, l represents the DMRS time domain occupied location identifier, and p represents the antenna port. f (k') represents the FD-OCC sequence, where the length of the FD-OCC sequence is 2, and w t (l') represents the TD-OCC sequence, where the length of the TD-OCC sequence is 2, and r(*) represents the DMRS sequence.

[0029] Specifically, taking PDSCH as an example, the relevant configuration parameters of DMRS configuration type 1 can be shown in Table 1-1, and the relevant configuration parameters of DMRS configuration type 2 can be shown in Table 1-2.

[0030] [Table 1-1]

[0031] [Table 1-2]

[0032] 2) Release 18 (Rel-18) DMRS enhancements.

[0033] In Rel-18, the number of DMRS ports is doubled, and the ports in each CMD group are doubled in a manner that the FD-OCC sequence length is 4. That is, in Rel-18, DMRS configuration type 1 (i.e., type 1) may be called reinforced DMRS configuration type 1, where the single symbol structure supports up to 8 ports and the dual symbol structure supports up to 16 ports, and DMRS configuration type 2 (i.e., type 2) may be called reinforced DMRS configuration type 2, where the single symbol structure supports up to 12 ports and the dual symbol structure supports up to 24 ports.

[0034] In addition, Rel-18 also expands the number of Physical Uplink Sharing Channel (PUSCH) data streams per terminal from the original maximum of four streams to a maximum of eight streams. This means that the DMRS corresponding to the PUSCH transmitted by each terminal needs to be multiplexed onto a maximum of eight ports. However, whether to adopt the Rel-17 DMRS port for multiplexing or the Rel-18 enhanced DMRS port for multiplexing depends on the terminal's capabilities.

[0035] Second, PTRS.

[0036] 1) Background of the introduction of PTRS.

[0037] In high-frequency band communications such as millimeter wave, the hardware implementation of the analog front-end presents significant challenges. For example, the crystal oscillators in high-frequency bands generate relatively large phase noise, which can destroy the orthogonality of the OFDM symbol subcarriers. Therefore, the NR system introduces a PTRS reference signal to estimate phase noise, and the receiving end can suppress or remove the phase noise based on the PTRS estimation result.

[0038] 2)PTRS port.

[0039] For downlink, Release 15 (Rel-15) supports a maximum of one PTRS port. However, Release 16 (Rel-16) introduces the SDM-based Multi-Transmission and Reception Point (MTRP) transmission mode, which extends the number of PTRS ports to two. However, this is limited to the MTRP transmission mode based on Space Division Multiplexing (SDM), and each Transmission Configuration Indication (TCI) corresponds to one PTRS port.

[0040] For the uplink, a maximum of two PTRS ports, port 0 and port 1, are supported. For a terminal with full antenna interference (i.e., full-coherent), one PTRS port is used by default. For terminals with partial antenna interference (i.e., partial-coherent) and non-coherent antenna interference (non-coherent), Radio Resource Control (RRC) can configure one or two PTRS ports. Here, configuring only two PTRS ports does not mean that both PTRS ports are used, but rather depends on the number of PUSCH data streams for uplink transmission. For example, if the number of PUSCH data streams is one, only PTRS port 0 is used. If the number of PUSCH data streams is two, both PTRS ports 0 and 1 may be used.

[0041] 3) PTRS resource mapping The resource mapping of a PTRS has an associated relationship with a DMRS, where the subcarriers in its frequency domain mapping are associated with the corresponding DMRS ports, and the symbols in its time domain mapping are associated with the occupied symbols of the corresponding DMRS.

[0042] The frequency domain resource mapping of PTRS can be expressed as follows: JPEG2026504049000005.jpg2790 where "mod" denotes modulo operation, and k is the subcarrier index mapped by the PTRS, i=1, 2, 3.... RNTI is the Radio Network Temporary Identity (RNTI) associated with the Downlink Control Information (DCI) that schedules data transmission, and N RB is the number of resource blocks (RBs) to be scheduled, JPEG2026504049000006.jpg1639 is the frequency domain mapping interval of the PTRS, i.e., the frequency domain density factor, which is related to the number of scheduled RBs, and k RE ref is the value of the resource element (RE) offset (i.e., RE offset) associated with the DMRS port corresponding to the PTRS. If the upper layer parameter resource element offset (i.e., resourceElementOffset) is not configured, the column corresponding to offset00 is adopted, and N RB sc is the number of subcarriers corresponding to one RB, and k RB ref is the value of the RB offset of the PTRS.

[0043] The time domain resource mapping of a PTRS is related to the occupied symbols of a DMRS and the corresponding modulation and coding scheme (MCS) level of a PUSCH / PDSCH.

[0044] When the MCS level of the data channel is relatively high, the corresponding modulation order and code rate are correspondingly high, making it more susceptible to phase noise, resulting in a denser time domain. When the MCS level of the data channel is relatively low, the corresponding modulation order and code rate are relatively low, making it less susceptible to phase noise, resulting in a sparser time domain. Therefore, in the design of the PTRS, the time domain symbol spacing of the PTRS can be flexibly configured as {1, 2, 4} according to different MCS levels. Furthermore, if a collision occurs with a DMRS during time domain mapping, the PTRS is not mapped on this symbol, and the time domain spacing is calculated based on this DMRS symbol.

[0045] 4) PTRS-DMRS association (i.e., association) indication.

[0046] For the downlink, the terminal can report the strongest layer (i.e., layer) to the network side as a reference by the LI through a Channel State Information (CSI) report. If the transmitted data channel corresponds to one codeword (i.e., codeword), the PTRS port is associated with the DMRS port with the smallest index on this codeword. If the transmitted data channel corresponds to two codewords, the PTRS port is associated with the DMRS port with the smallest index on the codeword with the largest MCS level. If the MCS levels of the two codewords are the same, the PTRS port is selected by default to be associated with the DMRS port with the smallest index on the first codeword.

[0047] Since there is no CSI report for the uplink, how the network side determines the strongest layer depends on the implementation of the network side. However, the network side needs to inform the terminal of the association relationship between the PTRS port and the DMRS through the PTRS-DMRS association domain in the DCI, so that the terminal can determine the resource and corresponding DMRS port when transmitting the PTRS. However, the PTRS-DMRS association indication method adopted for terminals with different antenna association capabilities is slightly different.

[0048] For a fully coherent antenna UE, only one PTRS port needs to be configured, and because the pre-Rel-18 NR system uplink only supports a maximum of four data streams (corresponding to four DMRS ports), only two bits are required to indicate the association between the PTRS and DMRS. If RRC configures only one PTRS port for partially coherent antenna and non-coherent antenna UEs, only two bits are required to indicate this.

[0049] When RRC configures up to two PTRS ports for a terminal with antenna partial-coherent and antenna non-coherent, the protocol specifies that PUSCH ports 1000 and 1002 are associated with PTRS port 0, and PUSCH ports 1001 and 1003 are associated with PTRS port 1. Therefore, it is necessary to indicate the DMRS ports corresponding to PTRS port 0 and port 1, respectively.

[0050] 5) PTRS firing power.

[0051] For downlink, if the network side configures the higher layer parameter energy ratio per resource element unit (i.e., epre-Ratio) (configuring it to 0 or 1), the EPRE ratio ρ of PTRS and PDSCH PTRS is as shown in Table 2.

[0052] [Table 2]

[0053] ρ PTRS After determining the firing power of the PTRS, JPEG2026504049000008.jpg1734 If the network side does not configure the upper layer parameter epre-Ratio, epre-Ratio is set to 0 by default.

[0054] For uplink, if the network side configures the upper layer parameter PTRS power (i.e., ptrs-Power) (i.e., configures it to 0 or 1), the EPRE ratio α of PTRS and PUSCH PUSCH PTRS is as shown in Table 3.

[0055] [Table 3]

[0056] where Qp={1,2} is the number of PTRS ports actually sent, and n PUSCH layer is the number of scheduled PUSCH data streams. α PUSCH PTRS After determining the firing power of the PTRS, JPEG2026504049000010.jpg1734 is used to scale in proportion to JPEG2026504049000011.jpg1742 If the network side does not configure the upper layer parameter ptrs-Power or is in non-codebook transmission mode, ptrs-Power is '00' by default.

[0057] The following describes in detail the phase tracking reference signal transmission method according to the embodiments of the present application through several examples and application scenarios in conjunction with the drawings.

[0058] FIG. 2 is a flowchart of a phase tracking reference signal transmission method according to an embodiment of the present application, which may be performed by a terminal, and as shown in FIG. 2, includes the following steps:

[0059] Step 201: The terminal determines transmission parameters of the PTRS; Step 202: the terminal transmits the PTRS based on the transmission parameters, or the terminal receives the PTRS based on the transmission parameters; wherein the PTRS includes at least one PTRS port, and the transmission parameters include at least one of a frequency domain resource offset of the PTRS port corresponding to a first DMRS port, an EPRE ratio between the PTRS port and a transmission channel, and a DMRS port associated with the PTRS port; The first DMRS is a DMRS that employs a first FD-OCC sequence to perform port multiplexing within the same CDM group, the length of the first FD-OCC sequence is greater than 2, the transport channel includes a PDSCH or a PUSCH, the maximum number of data streams supported by the PDSCH is greater than 6, the maximum number of data streams supported by the PUSCH is greater than 4, and the DMRS port associated with the PTRS port is used for PUSCH transmission.

[0060] In this embodiment, the PTRS may include one or at least two PTRS ports. It should be understood that if the PTRS includes one PTRS port, the transmission parameters may include at least one of a frequency-domain resource offset of the PTRS port corresponding to a first DMRS port, an EPRE ratio between the PTRS port and a transmission channel, and a DMRS port associated with the PTRS port. If the PTRS includes at least two PTRS ports, the transmission parameters may include at least one of a frequency-domain resource offset of each PTRS port of the at least two PTRS ports corresponding to a first DMRS port, an EPRE ratio between each PTRS port and a transmission channel, and a DMRS port associated with each PTRS port.

[0061] The first DMRS port may be understood as a port of a first DMRS, where the first DMRS is a DMRS that employs a first FD-OCC sequence to perform port multiplexing within the same CDM group, and the length of the first FD-OCC sequence is greater than 2, for example, the length of the first FD-OCC sequence is equal to 4. Taking the length of the first FD-OCC sequence as an example, for DMRS configuration type 1 (i.e., type 1), the single symbol structure supports a maximum of 8 ports, and the dual symbol structure supports a maximum of 16 ports. For DMRS configuration type 2 (i.e., type 2), the single symbol structure supports a maximum of 12 ports, and the dual symbol structure supports a maximum of 24 ports. DMRS configuration type 1 includes reinforced DMRS configuration type 1, and DMRS configuration type 2 includes reinforced DMRS configuration type 2. That is, the maximum number of DMRS ports supported in the embodiments of the present application is greater than the maximum number of DMRS ports supported in the related art. The frequency domain resource offset may include, but is not limited to, one or more of an RE offset, an RB offset, and so on.

[0062] The EPRE ratio between the PTRS port and the transport channel may include the EPRE ratio for each data stream of the PTRS port and the transport channel. For uplink PTRS transmission, the data channel may include a PUSCH. Here, the maximum number of data streams supported by the PUSCH may be greater than 4, for example, 6 or 8, etc. That is, the maximum number of data streams supported by the PUSCH in the embodiment of the present application is greater than the maximum number of data streams supported by the PUSCH in the related art. For downlink PTRS transmission, the data channel may include a PDSCH. Here, the maximum number of data streams supported by the PDSCH may be greater than 6, for example, 8, etc. That is, the maximum number of data streams supported by the PDSCH in the embodiment of the present application is greater than the maximum number of data streams supported by the PDSCH in the related art.

[0063] The DMRS port associated with the PTRS port may be a first DMRS port (i.e., the first DMRS port) or a second DMRS port (i.e., the second DMRS port). Here, the second DMRS is a DMRS that employs a second FD-OCC sequence to perform port multiplexing within the same CDM group, and the length of the second FD-OCC sequence is equal to two. However, regardless of whether the DMRS port associated with the PTRS port is the first DMRS port or the second DMRS port, it is used to transmit a PUSCH that supports a maximum number of data streams greater than four. For example, if the DMRS port associated with the PTRS port is the first DMRS port, it is used to transmit a PUSCH that supports a maximum number of eight data streams, and if the DMRS port associated with the PTRS port is the second DMRS port, it is used to transmit a PUSCH that supports a maximum number of six data streams.

[0064] For uplink PTRS transmission, the terminal can determine the transmission parameters of the PTRS and transmit the PTRS to the network side device based on the transmission parameters.For downlink PTRS transmission, the terminal can determine the transmission parameters of the PTRS and receive the PTRS from the network side device based on the transmission parameters.

[0065] In a phase tracking reference signal transmission method according to an embodiment of the present application, a terminal determines transmission parameters of a PTRS, and the terminal transmits the PTRS based on the transmission parameters or receives the PTRS based on the transmission parameters, where the PTRS includes at least one PTRS port, the transmission parameters include at least one of a frequency domain resource offset of the PTRS port corresponding to a first DMRS port, an EPRE ratio between the PTRS port and a transport channel, and a DMRS port associated with the PTRS port, the first DMRS is a DMRS that employs a first FD-OCC sequence for port multiplexing within the same CDM group, the length of the first FD-OCC sequence is greater than 2, the transport channel includes a PDSCH or a PUSCH, the maximum number of data streams supported by the PDSCH is greater than 6, the maximum number of data streams supported by the PUSCH is greater than 4, and the DMRS port associated with the PTRS port is used for transmitting the PUSCH. That is, the embodiments of the present application provide a PTRS transmission method when the number of DMRS ports, the maximum number of supported data streams in a data channel, etc. increases, thereby ensuring the accuracy of phase noise estimation.

[0066] Optionally, the frequency domain resource offset includes at least one of an RE offset and an RB offset.

[0067] Optionally, the RE offsets of the PTRS ports corresponding to at least two first DMRS ports are different, and the at least two first DMRS ports belong to the same CDM group.

[0068] In this embodiment, the RE offsets (ie, RE offsets) of the PTRS ports corresponding to at least two first DMRS ports in the same CDM group are different, thus resource collision can be effectively avoided.

[0069] For example, if the DMRS is of DMRS configuration type 1, the RE offsets of the PTRS ports corresponding to the first four DMRS ports are different. For example, if the DMRS is of DMRS configuration type 1, the RE offsets of the PTRS ports corresponding to the first four DMRS ports are different.

[0070] Optionally, the RE offsets of the PTRS ports corresponding to the at least two first DMRS ports correspond to the increasing order of the at least two first DMRS port indexes and the subcarriers occupied by the at least two first DMRS ports in increasing order.

[0071] Hereinafter, this embodiment will be described as an example in connection with different cases.

[0072] (1) When the DMRS is of configuration type 1, the default resource element offsets (i.e., RE offsets) corresponding to the first DMRS ports 0, 1, 8, and 9 in CDM group 0 are 0, 2, 4, and 6, respectively, and the default RE offsets corresponding to the first DMRS ports 2, 3, 10, and 11 in CDM group 1 are 1, 3, 5, and 7, respectively. That is, the increasing order of the DMRS port index corresponds to the subcarriers occupied by the DMRS ports, as shown in Table 4.

[0073] [Table 4]

[0074] (2) When the DMRS is of configuration type 1, the default RE offsets corresponding to the first DMRS ports 0, 1, 8, and 9 in CDM group 0 are 0, 2, 8, and 10, respectively, and the default RE offsets corresponding to the first DMRS ports 2, 3, 10, and 11 in CDM group 1 are 1, 3, 9, and 11, respectively. That is, the increasing order of the DMRS port index corresponds to the subcarriers occupied by the DMRS ports, as shown in Table 5.

[0075] [Table 5]

[0076] (3) When the DMRS is of configuration type 1, the default RE offsets corresponding to the first DMRS ports 0, 1, 8, and 9 in CDM group 0 are 0, 2, 6, and 8, respectively, and the default RE offsets corresponding to the first DMRS ports 2, 3, 10, and 11 in CDM group 1 are 1, 3, 7, and 9, respectively. That is, the increasing order of the DMRS port index corresponds to the subcarriers occupied by the DMRS ports, as shown in Table 6.

[0077] [Table 6]

[0078] (4) When the DMRS is of configuration type 2, the default RE offsets corresponding to the first DMRS ports 0, 1, 12, and 13 in CDM group 0 are 0, 1, 6, and 7, respectively; the default RE offsets corresponding to the first DMRS ports 2, 3, 14, and 15 in CDM group 1 are 2, 3, 8, and 9, respectively; and the default RE offsets corresponding to the first DMRS ports 4, 5, 16, and 17 in CDM group 2 are 4, 5, 10, and 11, respectively. That is, the increasing order of the DMRS port index corresponds to the subcarriers occupied by the DMRS ports, as shown in Table 7.

[0079] [Table 7]

[0080] In some optional embodiments, the network side device can further adjust the RE offset by RRC signaling, and one optional adjustment rule is to add an offset of interval T to the default RE offset. However, since the final RE offset is limited to the range of one RB, if the value of the default RE offset+T exceeds 12, it is necessary to perform a modulo calculation with respect to 12. For example, if the value of the default RE offset+T is 13, the final RE offset is 1.

[0081] For example, as shown in Tables 4, 5, and 6, for DMRS configuration type 1, if there is no associated RRC signaling or the RRC signaling corresponds to "offset00," a default RE offset is adopted, i.e., T=0. If the RRC signaling corresponds to "offset01," an offset of T=2 is added to the default RE offset. If the RRC signaling corresponds to "offset10," an offset of T=6 is added to the default RE offset. If the RRC signaling corresponds to "offset11," an offset of T=8 is added to the default RE offset. The specific RE offset values ​​corresponding to each DMRS port are shown in Tables 4, 5, and 6.

[0082] For example, as shown in Table 4, for DMRS configuration type 2, if there is no associated RRC signaling or the RRC signaling corresponds to "offset00", a default RE offset is adopted; that is, if the RRC signaling with T=0 corresponds to "offset01", an offset of T=1 is added to the default RE offset; if the RRC signaling corresponds to "offset10", an offset of T=6 is added to the default RE offset; if the RRC signaling corresponds to "offset11", an offset of T=7 is added to the default RE offset; and the specific RE offset values ​​corresponding to each DMRS port are shown in Table 7.

[0083] In some alternative embodiments, for DMRS configuration type 1, the first DMRS ports 0, 1, 2, and 3 may be considered as first port packets, and the first DMRS ports 8, 9, 10, and 11 may be considered as second port packets. The RE offsets on the first DMRS ports 0, 1, 2, 3, 8, 9, 10, and 11 of the PTRS ports may be different, but the RB offsets (i.e., RB offsets) corresponding to the first DMRS ports in the first port packets and the second port packets may be the same.

[0084] It should be noted that the index of the first DMRS port in the table is used only for the sake of simplicity, and for the DMRS of PDSCH, DMRS port indices 0 to 17 in the table above correspond to 1000 to 1017, respectively. For the DMRS of PUSCH, DMRS port indices 0 to 17 in the table above correspond to 0 to 17, respectively.

[0085] Optionally, the RE offsets of the PTRS ports corresponding to some first DMRS ports are the same, and the some first DMRS ports belong to the same CDM group.

[0086] In this embodiment, the RE offsets of PTRS ports corresponding to some first DMRS ports in the same CDM group are the same, and thus when the RE offset is limited to the range of one RB, it is possible to support allocating more frequency domain resource offsets corresponding to the first DMRS port for the PTRS port.

[0087] Optionally, a difference value between the port indexes of the portion of first DMRS ports is N, where N is a positive integer.

[0088] The value of N may be predefined in the protocol.

[0089] The following is an exemplary description of this embodiment in conjunction with different cases: (1) When the DMRS is of configuration type 1, the default RE offsets corresponding to the first DMRS ports 0, 1, 8, and 9 in CDM group 0 are 0, 2, 0, and 2, respectively, and the default RE offsets corresponding to the first DMRS ports 2, 3, 10, and 11 in CDM group 1 are 1, 3, 1, and 3, respectively. That is, the default RE offsets corresponding one-to-one to the first DMRS ports 0, 1, 2, and 3 are the same as those to the first DMRS ports 8, 9, 10, and 11. In this case, the port index difference between the first DMRS ports corresponding to the same RE offset is 8, as shown in Table 8.

[0090] [Table 8]

[0091] (2) When the DMRS is of configuration type 2, the default RE offsets corresponding to the first DMRS ports 0, 1, 12, and 13 in CDM group 0 are 0, 1, 0, and 1, respectively; the default RE offsets corresponding to the first DMRS ports 2, 3, 14, and 15 in CDM group 1 are 2, 3, 2, and 3, respectively; and the default RE offsets corresponding to the first DMRS ports 4, 5, 16, and 17 in CDM group 2 are 4, 5, 4, and 5, respectively. That is, the default RE offsets corresponding one-to-one to the first DMRS ports 0, 1, 2, 3, 4, and 5 are the same as those to the first DMRS ports 12, 13, 14, 15, 16, and 17. In this case, the port index difference between the first DMRS ports corresponding to the same RE offset is 12, as shown in Table 9.

[0092] [Table 9]

[0093] In some optional embodiments, the network side device can further adjust the RE offset by RRC signaling. One optional adjustment rule is to add an offset of interval T to the default RE offset. However, since the final RE offset is limited to the range of one RB, if the value of the default RE offset+T exceeds 12, a modulo calculation with respect to 12 is required. For example, if the value of the default RE offset+T is 13, the final RE offset is 1.

[0094] For example, as shown in Table 8, for DMRS configuration type 1, if there is no associated RRC signaling or the RRC signaling corresponds to "offset00", a default RE offset is adopted; that is, if the RRC signaling with T=0 corresponds to "offset01", an offset of T=2 is added to the default RE offset; if the RRC signaling corresponds to "offset10", an offset of T=6 is added to the default RE offset; if the RRC signaling corresponds to "offset11", an offset of T=8 is added to the default RE offset; and the specific RE offset values ​​corresponding to each DMRS port are shown in Table 8.

[0095] For example, as shown in Table 9, for DMRS configuration type 2, if there is no associated RRC signaling or the RRC signaling corresponds to "offset00", a default RE offset is adopted; that is, if the RRC signaling with T=0 corresponds to "offset01", an offset of T=1 is added to the default RE offset; if the RRC signaling corresponds to "offset10", an offset of T=6 is added to the default RE offset; if the RRC signaling corresponds to "offset11", an offset of T=7 is added to the default RE offset; and the specific RE offset values ​​corresponding to each DMRS port are shown in Table 9.

[0096] It should be noted that the index of the first DMRS port in the table is used only for the sake of simplicity, and for the DMRS of PDSCH, DMRS port indices 0 to 17 in the table above correspond to 1000 to 1017, respectively, and for the DMRS of PUSCH, DMRS port indices 0 to 17 in the table above correspond to 0 to 17, respectively.

[0097] In some optional embodiments, when the RE offsets corresponding to some first DMRS ports are the same, the RB offsets corresponding to the some first DMRS ports may be different to avoid resource conflicts between them.

[0098] Optionally, the RB offset of the PTRS port corresponding to the first port packet is different from the RB offset of the PTRS port corresponding to the second port packet; Or, The RB offset of the PTRS port corresponding to the first port packet is the same as the RB offset of the PTRS port corresponding to the second port packet; Here, the first port packet and the second port packet each include at least one first DMRS port.

[0099] In some alternative embodiments, the first DMRS port index in the second port packet may be greater than the first DMRS port index in the first port packet. Illustratively, for DMRS configuration type 1, the first DMRS ports 0, 1, 2, and 3 may be separated into first port packets, and the first DMRS ports 8, 9, 10, and 11 may be separated into second port packets. For DMRS configuration type 2, the first DMRS ports 0, 1, 2, 3, 4, and 5 may be separated into first port packets, and the first DMRS ports 12, 13, 14, 15, 16, and 17 may be separated into second port packets.

[0100] It should be noted that the first DMRS ports in different port packets may come from the same CDM group or groups, while the first DMRS ports in the same port packet may come from different CDM groups. For example, if CDM group 0 includes first DMRS ports 0, 1, 8, and 9, and CDM group 1 includes first DMRS ports 2, 3, 10, and 11, then for the above example, the first DMRS port in the first port packet and the first DMRS port in the second port packet both come from CDM group 0 and CDM group 1.

[0101] In one embodiment, the RB offset of the PTRS port corresponding to the first port packet is different from the RB offset of the PTRS port corresponding to the second port packet, thus avoiding resource collisions based on the RB offset. As can be seen, in this embodiment, the RB offsets in the first port packets of the PTRS ports corresponding to each first DMRS port are all the same.

[0102] In some optional embodiments, when the RE offsets corresponding to some first DMRS ports are the same, the first DMRS ports with the same corresponding RE offsets can be divided into the same port packet, and the first DMRS ports with different corresponding RE offsets can be divided into different port packets, thus avoiding resource collisions based on the RB offsets.

[0103] In another embodiment, the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet are the same. In this case, to reduce resource conflicts, the RE offset of the PTRS port corresponding to the first port packet and the RE offset of the PTRS port corresponding to the second port packet may be configured to be different.

[0104] Optionally, if the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet are different, the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet are determined based on first RB offset signaling; Alternatively, a difference value between the RB offset of the PTRS port corresponding to a first port packet and the RB offset of the PTRS port corresponding to a second port packet is determined based on a frequency domain density coefficient of the PTRS port; Or, the difference value between the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet is K, where K is a positive integer.

[0105] In one embodiment, the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet can be determined based on first RB offset signaling, thereby improving the flexibility of RB offset configuration, where the first RB offset signaling may be RRC signaling or DCI signaling.

[0106] Optionally, the first RB offset signaling is used to indicate the RB offset of the PTRS port corresponding to a first port packet and the RB offset of the PTRS port corresponding to a second port packet, respectively; Or, The first RB offset signaling is used to indicate a difference value between the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet.

[0107] For example, for the first port packet or the second port packet, the frequency domain resource mapping of the PTRS port can be expressed by the following formula: JPEG2026504049000018.jpg2792 where "mod" denotes modulo operation, and k is the subcarrier index mapped by the PTRS port, i=1, 2, 3.... RNTI is the RNTI associated with the DCI. RB is the number of RBs to be scheduled. PT-RS is the frequency domain density coefficient of the PTRS port. N RB SC is the number of subcarriers corresponding to one RB, and k RB ref is the value of the RB offset of the PTRS. RB offset is the RB offset corresponding to the first port packet or the second port packet (optionally, the protocol specifies that the RB offsets corresponding to the first port packet and the second port packet are different), or k RB offset is the difference between the RB offset corresponding to the first port packet and the second port packet, JPEG2026504049000019.jpg1635 or JPEG2026504049000020.jpg1134. At this time, the first port packet k RB offset It may be understood that is 0 by default and does not need to be configured by the first RB offset signaling. That is, for the first port packet, the frequency domain resource mapping of the PTRS can also be expressed by the following formula: JPEG2026504049000021.jpg2592 where "mod" denotes modulo operation and k is the subcarrier index mapped by the PTRS port, i=1, 2, 3.... RNTI is the RNTI associated with the DCI. RB is the number of RBs to be scheduled. PT-RS is the frequency domain density coefficient of the PTRS port. RB offset is the RB offset. N RB SC is the number of subcarriers corresponding to one RB, and k RB ref is the value of the RB offset of the PTRS.

[0108] In another embodiment, a difference value between the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet can be determined based on the frequency domain density coefficient of the PTRS port. Illustratively, the difference value between the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet is determined based on the frequency domain density coefficient K of the PTRS port. PT-RS For example, if the RB offset corresponding to the first port packet is 1, the RB offset corresponding to the second port packet is 3.

[0109] In yet another embodiment, the protocol may stipulate that the difference between the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet is K, and the value of K may be stipulated by the protocol. For example, the protocol stipulates that the value of K is 1. In this case, the RB offset of the first port packet is determined by the RNTI (i.e., n RNTI ) is determined by

[0110] For example, for the first port packet, the frequency domain resource mapping of the PTRS port can be expressed by the following formula: JPEG2026504049000022.jpg2989 where "mod" denotes modulo operation and k is the subcarrier index mapped by the PTRS port, i=1, 2, 3.... RNTI is the RNTI associated with the DCI. RB is the number of RBs to be scheduled. PT-RS is the frequency domain density coefficient of the PTRS port. RE ref is the RE offset. N RB SC is the number of subcarriers corresponding to one RB, and k RB ref is the value of the RB offset of the PTRS.

[0111] For example, for a second port packet, the frequency domain resource mapping of the PTRS port can be expressed as follows: JPEG2026504049000023.jpg2989 where "mod" denotes modulo operation and k is the subcarrier index mapped by the PTRS port, i=1, 2, 3.... RNTI is the RNTI associated with the DCI, and A is the difference between the RB offset corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet. RB is the number of RBs to be scheduled. PT-RS is the frequency domain density coefficient of the PTRS port. RE ref is the RE offset. N RB SC is the number of subcarriers corresponding to one RB, and k RB ref is the value of the RB offset of the PTRS.

[0112] Illustratively, for DMRS configuration type 1, the first DMRS ports in the first port packet include first DMRS ports 0, 1, 2, and 3, and the first DMRS ports in the second port packet include first DMRS ports 8, 9, 10, and 11. For DMRS configuration type 2, the first DMRS ports in the first port packet include first DMRS ports 0, 1, 2, 3, 4, and 5, and the first DMRS ports in the second port packet include first DMRS ports 12, 13, 14, 15, 16, and 17.

[0113] Optionally, the EPRE ratio of the PTRS port and the transport channel is a first EPRE ratio on each RE of each data stream of the PTRS port and the PDSCH; The PUSCH and a second EPRE ratio on each RE of each data stream of the PTRS port are included.

[0114] As can be understood, for uplink PTRS transmission, the EPRE ratio between the PTRS port and the transport channel may include a second EPRE ratio on each RE of each data stream of the PUSCH and the PTRS port, and for downlink PTRS transmission, the EPRE ratio between the PTRS port and the transport channel may include a first EPRE ratio on each RE of each data stream of the PTRS port and the PDSCH.

[0115] Alternatively, when the DMRS for the PDSCH transmission is a first DMRS, the first EPRE ratio is determined based on the number of data streams of the PDSCH, or the first EPRE ratio is 0 dB.

[0116] Illustratively, the first EPRE ratio can be determined based on the following formula: JPEG2026504049000024.jpg1748 where ρ PTRSrepresents the first EPRE rate, and L1 represents the number of data streams of the PDSCH, where 1≦L1≦8.

[0117] As can be seen, the first EPRE ratio is 0 dB, i.e., does not scale the transmit power of the PTRS port.

[0118] In some alternative embodiments, the first EPRE ratio may be indicated by an RRC parameter epre-Ratio. Specifically, the first EPRE ratios corresponding to different numbers of PDSCH data streams L1 can be shown in Table 10.

[0119] [Table 10]

[0120] Alternatively, if the DMRS for the PUSCH transmission is a first DMRS or a second DMRS, the second EPRE ratio may be: the number of data streams of the PUSCH; Antenna-related capability information of the terminal; and the number of PTRS ports, wherein if the DMRS for the PUSCH transmission is the first DMRS, the maximum number of data streams supported by the PUSCH is 8, and if the DMRS for the PUSCH transmission is the second DMRS, the maximum number of data streams supported by the PUSCH is 6, the second DMRS is a DMRS that employs a second FD-OCC sequence to perform port multiplexing within the same CDM group, and the length of the second FD-OCC sequence is equal to 2.

[0121] Illustratively, the number of PTRS ports may be 1, 2, 3 or 4.

[0122] In one embodiment, when the DMRS for the PUSCH transmission is a first DMRS, the maximum number of data streams of the PUSCH is 8, that is, the value range of the number of data streams of the PUSCH is [1, 8].

[0123] The present embodiment will be described below using an example.

[0124] If the DMRS for PUSCH transmission is the first DMRS, up to eight first DMRS ports can be supported on a single OFDM symbol, and the number of PUSCH data streams is up to 8. In this case, if the UE supports transmission of 1 to 8 PUSCH data streams, the second EPRE rate (i.e., α PUSCH PTRS ) is the number of PUSCH data streams (i.e., L2, 1≦L2≦8), the UE's antenna association capability information, the number of PTRS ports associated with the PUSCH (i.e., Q P and Q P is 1, 2, 3 or 4), where the UE's antenna association and the maximum number of supported PTRS ports are related to the UE's capabilities, and the UE can report its capabilities to serve as a reference for PTRS configuration by the network side device.

[0125] 1) When the number of PUSCH data streams is 1: Q P = 1, for a terminal with a fully coherent antenna, α PUSCH PTRS is 0.

[0126] 2) When the number of PUSCH data streams is 2: Q P =1: For a terminal with a fully coherent antenna, α PUSCH PTRS is 3, For a terminal with a partially coherent antenna, α PUSCH PTRS is 0, For a terminal with a non-coherent antenna, α PUSCH PTRS is 0, Q P =2: For a terminal with a partially coherent antenna, α PUSCH PTRS is 3, For a terminal with a non-coherent antenna, α PUSCH PTRS is 3.

[0127] 3) When the number of PUSCH data streams is 3: Q P =1: For a terminal with a fully coherent antenna, α PUSCH PTRS is 4.77, For a terminal with a partially coherent antenna, α PUSCH PTRS is 0 or 3, For a terminal with a non-coherent antenna, α PUSCH PTRS is 0, Q P =2: For a terminal with a partially coherent antenna, α PUSCH PTRS is 3 or 6, For a terminal with non-coherent antennas, is 3, Q P =3: For a terminal with a partially coherent antenna, α PUSCH PTRS is 4.77, For a terminal with a non-coherent antenna, α PUSCH PTRS is 4.77.

[0128] 4) When the number of PUSCH data streams is 4: Q P =1: For a terminal with a fully coherent antenna, α PUSCH PTRS is 6, For a terminal with a partially coherent antenna, α PUSCH PTRS is 3, For a terminal with a non-coherent antenna, α PUSCH PTRS is 0, Q P =2: For a terminal with a partially coherent antenna, α PUSCH PTRS is 6, For a terminal with a non-coherent antenna, α PUSCH PTRS is 3, Q P =3: For a terminal with a partially coherent antenna, α PUSCH PTRS is 4.77, For a terminal with a non-coherent antenna, α PUSCH PTRS is 4.77, Q P =4: For a terminal with a partially coherent antenna, α PUSCH PTRS is 6, For a terminal with a non-coherent antenna, α PUSCH PTRS is 6.

[0129] 5) When the number of PUSCH data streams is 5: Q P =1: For a terminal with a fully coherent antenna, α PUSCH PTRS is 7, For a terminal with a partially coherent antenna, α PUSCH PTRS is 0 or 3 or 4.77, For a terminal with a non-coherent antenna, α PUSCH PTRS is 0, Q P =2: For a terminal with a partially coherent antenna, α PUSCH PTRS is 3 or 6 or 7.78 or 9, For a terminal with a non-coherent antenna, α PUSCH PTRS is 3, Q P =3: For a terminal with a partially coherent antenna, α PUSCH PTRS is 4.77 or 7.78, For a terminal with a non-coherent antenna, α PUSCH PTRS is 4.77, Q P =4: For a terminal with a partially coherent antenna, α PUSCH PTRS is 6 or 9, For a terminal with a non-coherent antenna, α PUSCH PTRS is 6.

[0130] 6) When the number of PUSCH data streams is 6: Q P =1: For a terminal with a fully coherent antenna, α PUSCH PTRS is 7.78, For a terminal with a partially coherent antenna, α PUSCH PTRS is 0 or 3 or 4.77, For a terminal with a non-coherent antenna, α PUSCH PTRS is 0, Q P =2: For a terminal with a partially coherent antenna, α PUSCH PTRS is 3 or 6 or 7.8 or 9, For a terminal with a non-coherent antenna, α PUSCH PTRS is 3, Q P =3: For a terminal with a partially coherent antenna, α PUSCH PTRS is 4.77 or 7.78, For a terminal with a non-coherent antenna, α PUSCH PTRS is 4.77, Q P =4: For a terminal with a partially coherent antenna, α PUSCH PTRS is 6 or 9, For a terminal with a non-coherent antenna, α PUSCH PTRS is 6.

[0131] 7) When the number of PUSCH data streams is 7: Q P =1: For a terminal with a fully coherent antenna, α PUSCH PTRS is 8.45, For a terminal with a partially coherent antenna, α PUSCH PTRS is 0 or 3 or 4.77 or 6, For a terminal with a non-coherent antenna, α PUSCH PTRS is 0, Q P =2: For a terminal with a partially coherent antenna, α PUSCH PTRS is 3 or 6 or 7.78 or 9, For a terminal with a non-coherent antenna, αPUSCH PTRS is 3, Q P =3: For a terminal with a partially coherent antenna, α PUSCH PTRS is 4.77 or 7.78, For a terminal with a non-coherent antenna, α PUSCH PTRS is 4.77, Q P =4: For a terminal with a partially coherent antenna, α PUSCH PTRS is 6 or 9, For a terminal with a non-coherent antenna, α PUSCH PTRS is 6.

[0132] 8) When the number of PUSCH data streams is 8: Q P =1: For a terminal with a fully coherent antenna, α PUSCH PTRS is 9, For a terminal with a partially coherent antenna, α PUSCH PTRS is 6 or 3, For a terminal with a non-coherent antenna, α PUSCH PTRS is 0, Q P =2: For a terminal with a partially coherent antenna, α PUSCH PTRS is 9 or 6, For a terminal with a non-coherent antenna, α PUSCH PTRS is 3, Q P =3: For a terminal with a partially coherent antenna, α PUSCH PTRS is 7.78, For a terminal with a non-coherent antenna, α PUSCH PTRS is 4.77, Q P =4: For a terminal with a partially coherent antenna, α PUSCH PTRS is 9, For a terminal with a non-coherent antenna, α PUSCH PTRS is 6.

[0133] It should be noted that when the transmission mode of the PUSCH is configured as a non-codebook, the corresponding second EPRE rate α PUSCH PTRS is the same as the non-coherent case.

[0134] In addition, the value of the second EPRE ratio can be configured by the RRC parameter ptrs-Power. In the cases of antenna full-coherence, antenna partial-coherence, and antenna non-coherence, the corresponding second EPRE ratio α PUSCH PTRS are the same, and all of the values ​​are those for the fully coherent antenna given above.

[0135] In another embodiment, when the DMRS for the PUSCH transmission is the second DMRS, the maximum number of data streams of the PUSCH is 6. That is, the value range of the number of data streams of the PUSCH is [1, 6].

[0136] The present embodiment will be described below with examples: If the DMRS for PUSCH transmission is the second DMRS, up to six second DMRS ports can be supported on a single OFDM symbol, and the number of PUSCH data streams is up to 6. In this case, if the terminal can support transmission of 1 to 6 PUSCH data streams, the α PUSCHPTRS is the number of data streams in the PUSCH (i.e., L3, where 1≦L3≦6), the antenna association capability of the UE, and the number of PTRS ports associated with the PUSCH (i.e., Q P and Q P where Q is the number of PTRS ports supported by the UE and the antenna association of the UE. P is related to the capabilities of the UE, and the UE can report its capabilities to serve as a reference for PTRS configuration by the network side equipment.

[0137] 1) When the number of PUSCH data streams is 1: Q P = 1, for a terminal with a fully coherent antenna, α PUSCH PTRS is 0.

[0138] 2) When the number of PUSCH data streams is 2: Q P =1: For a terminal with a fully coherent antenna, α PUSCH PTRS is 3, For a terminal with a partially coherent antenna, α PUSCH PTRS is 0, For a terminal with a non-coherent antenna, α PUSCH PTRS is 0, Q P =2: For a terminal with a partially coherent antenna, α PUSCH PTRS is 3, For a terminal with a non-coherent antenna, α PUSCH PTRS is 3.

[0139] 3) When the number of PUSCH data streams is 3, Q P =1: For a terminal with a fully coherent antenna, α PUSCH PTRS is 4.77, For a terminal with a partially coherent antenna, α PUSCH PTRS is 0 or 3, For a terminal with a non-coherent antenna, α PUSCH PTRS is 0, Q P =2: For a terminal with a partially coherent antenna, α PUSCH PTRS is 3 or 6, For a terminal with a non-coherent antenna, α PUSCH PTRS is 3, Q P =3: For a terminal with a partially coherent antenna, α PUSCH PTRS is 4.77, For a terminal with a non-coherent antenna, α PUSCH PTRS is 4.77.

[0140] 4) When the number of PUSCH data streams is 4: Q P =1: For a terminal with a fully coherent antenna, α PUSCH PTRS is 6, For a terminal with a partially coherent antenna, α PUSCH PTRS is 3, For a terminal with a non-coherent antenna, α PUSCH PTRS is 0, Q P =2: For a terminal with a partially coherent antenna, α PUSCH PTRS is 6, For a terminal with a non-coherent antenna, α PUSCH PTRS is 3, Q P =3: For a terminal with a partially coherent antenna, α PUSCH PTRS is 4.77, For a terminal with a non-coherent antenna, α PUSCH PTRS is 4.77, Q P =4: For a terminal with a partially coherent antenna, α PUSCH PTRS is 6, For a terminal with a non-coherent antenna, α PUSCH PTRS is 6.

[0141] 5) When the number of PUSCH data streams is 5: Q P =1: For a terminal with a fully coherent antenna, α PUSCH PTRS is 7, For a terminal with a partially coherent antenna, α PUSCH PTRS is 0 or 3 or 4.77, For a terminal with a non-coherent antenna, α PUSCH PTRS is 0, Q P =2: For a terminal with a partially coherent antenna, α PUSCH PTRS is 3 or 6 or 7.78 or 9, For a terminal with a non-coherent antenna, α PUSCH PTRS is 3, Q P =3: For a terminal with a partially coherent antenna, αPUSCH PTRS is 4.77 or 7.78, For a terminal with a non-coherent antenna, α PUSCH PTRS is 4.77, Q P =4: For a terminal with a partially coherent antenna, α PUSCH PTRS is 6 or 9, For a terminal with a non-coherent antenna, α PUSCH PTRS is 6.

[0142] 6) When the number of PUSCH data streams is 6: Q P =1: For a terminal with a fully coherent antenna, α PUSCH PTRS is 7.78, For a terminal with a partially coherent antenna, α PUSCH PTRS is 0 or 3 or 4.77, For a terminal with a non-coherent antenna, α PUSCH PTRS is 0, Q P =2: For a terminal with a partially coherent antenna, α PUSCH PTRS is 3 or 6 or 7.8 or 9, For a terminal with a non-coherent antenna, α PUSCH PTRS is 3, Q P =3: For a terminal with a partially coherent antenna, α PUSCH PTRS is 4.77 or 7.78, For a terminal with a non-coherent antenna, α PUSCH PTRS is 4.77, Q P =4: For a terminal with a partially coherent antenna, α PUSCH PTRS is 6 or 9, For a terminal with a non-coherent antenna, α PUSCH PTRS is 6.

[0143] It should be noted that when the transmission mode of the PUSCH is configured as a non-codebook, the corresponding second EPRE rate α PUSCH PTRS is the same as in the case of non-coherent antennas.

[0144] In addition, the value of the second EPRE ratio can be configured by the RRC parameter ptrs-Power. In the cases of antenna full-coherence, antenna partial-coherence, and antenna non-coherence, the corresponding second EPRE ratio α PUSCH PTRS are the same, and all of the values ​​are those for the fully coherent antenna given above.

[0145] Alternatively, when the DMRS for the PUSCH transmission is the first DMRS or the second DMRS, the second EPRE ratios corresponding to different PTRS ports are the same, or the second EPRE ratios corresponding to different PTRS ports are different.

[0146] Illustratively, when the number of data streams of the PUSCH is an odd number (for example, 3, 5 or 7), the second EPRE ratios corresponding to different PTRS ports are different.

[0147] Alternatively, if one PTRS port is configured in the terminal, a DMRS port associated with the PTRS port is one DMRS port among the first M scheduled DMRS ports, where the value of M is determined based on the number of data streams of the PUSCH; Or, When at least two PTRS ports are configured in the terminal, the DMRS port associated with each PTRS port among the at least two PTRS ports is one DMRS port among all DMRS ports that share each PTRS port.

[0148] One PTRS port is configured in the terminal, i.e., the PTRS includes one PTRS port. At least two PTRS ports are configured in the terminal, i.e., the PTRS includes at least two PTRS ports. For example, two PTRS ports or four PTRS ports are configured in the terminal.

[0149] Alternatively, if the number of data streams of the PUSCH is four or less, the value of M is the number of data streams of the PUSCH; and / or If the number of data streams of the PUSCH is greater than four, the value of M is four.

[0150] When one PTRS port is configured in the terminal, and the number of PUSCH data streams is L, if the number of PUSCH data streams is four or less, the network side device can indicate by a DCI that a certain DMRS port among the first L scheduled DMRS ports is associated with the PTRS port. If the number of PUSCH data streams is greater than four, the network side device can indicate by a DCI that a certain DMRS port among the first four DMRS ports scheduled with the DCI is associated with the PTRS port. In this case, the 2-bit PTRS-DMRS association domain in the DCI can indicate the DMRS port associated with the PTRS port.

[0151] For example, assuming that the UE is configured with PTRS port 0, the network side device may indicate the DMRS port associated with PTRS port 0 by the PTRS-DMRS association domain in the DCI, where the size of the PTRS-DMRS association domain is 2 bits. Table 11 shows the correspondence between the indication value in the PTRS-DMRS association domain and the DMRS port, where the DMRS port is the DMRS port used for the scheduled PUSCH.

[0152] [Table 11]

[0153] For example, if the number of PUSCH data streams is 8, the 8 data streams correspond to the 8 scheduled first DMRS ports, respectively, and the PTRS-DMRS association domain indicates that one of the first 4 ports of the 8 ports is associated with PTRS port 0. Also, if the number of PUSCH data streams is 6, the 6 data streams correspond to the 6 scheduled second DMRS ports, respectively, and the PTRS-DMRS association domain indicates that one of the first 4 ports of the 6 ports is associated with PTRS port 0.

[0154] If at least two PTRS ports are configured in the terminal, the DMRS port associated with each of the at least two PTRS ports is one of all DMRS ports that share the PTRS port. For example, if two PTRS ports (i.e., PTRS port 0 and PTRS port 1) are configured in the terminal, the DMRS port associated with PTRS port 0 is one of all DMRS ports that share PTRS port 0, and the DMRS port associated with PTRS port 1 is one of all DMRS ports that share PTRS port 1. If the terminal is configured with four PTRS ports (i.e., PTRS port 0, PTRS port 1, PTRS port 2, and PTRS port 3), the DMRS port associated with PTRS port 0 is one DMRS port among all DMRS ports that share PTRS port 0, the DMRS port associated with PTRS port 1 is one DMRS port among all DMRS ports that share PTRS port 1, the DMRS port associated with PTRS port 2 is one DMRS port among all DMRS ports that share PTRS port 2, and the DMRS port associated with PTRS port 3 is one DMRS port among all DMRS ports that share PTRS port 3.

[0155] Alternatively, the DMRS port associated with each PTRS port of the at least two PTRS ports is one of the first two DMRS ports among all DMRS ports sharing each PTRS port, respectively. As can be understood, if the number of all DMRS ports sharing each PTRS port is 1, the DMRS port associated with each PTRS port of the at least two PTRS ports is this DMRS port.

[0156] In some alternative embodiments, when at least two PTRS ports are configured in a terminal, if the number of PUSCH data streams is four or less, the network side device indicates, by the PTRS-DMRS association domain in the DCI, that DMRS Port A is associated with PTRS Port 0 and / or that DMRS Port B is associated with PTRS Port 1, where DMRS Port A is one DMRS port among all DMRS ports sharing PTRS Port 0, and DMRS Port B is one DMRS port among all DMRS ports sharing PTRS Port 1. If the number of all DMRS ports sharing each PTRS port is 1, the DMRS port associated with each PTRS port among the at least two PTRS ports is this DMRS port. If the number of PUSCH data streams is greater than four, the network side device indicates, by the PTRS-DMRS association domain in the DCI, that DMRS Port A is associated with PTRS Port 0 and / or that DMRS Port B is associated with PTRS Port 1, where DMRS Port A is one DMRS port among the first two DMRS ports among all DMRS ports sharing PTRS Port 0. DMRS Port B is one of the first two DMRS ports among all DMRS ports that share PTRS Port 1. In the above embodiment, the 2-bit PTRS-DMRS association domain in the DCI can indicate the DMRS port associated with the PTRS port.

[0157] In the following, an example in which two PTRS ports are configured in a terminal and an example in which four PTRS ports are configured in a terminal will be described.

[0158] Case 1: PTRS port 0 and PTRS port 1 are configured on the terminal.

[0159] The network side device can indicate the DMRS ports associated with PTRS port 0 and PTRS port 1 by the PTRS-DMRS association domain in the DCI. Here, the size of the PTRS-DMRS association domain is 2 bits. Table 12 shows the correspondence between the indication value in the PTRS-DMRS association domain and the DMRS port, where the DMRS port is the DMRS port used for the scheduled PUSCH.

[0160] [Table 12]

[0161] For example, if there are eight data streams on the PUSCH, the eight data streams correspond to eight scheduled first DMRS ports, respectively. Here, four first DMRS ports share PTRS port 0, and the other four first DMRS ports share PTRS port 1. However, the upper bits of the PTRS-DMRS association domain indicate only one of the first two ports among the four first DMRS ports that share PTRS port 0, and the lower bits of the PTRS-DMRS association domain indicate only one of the first two ports among the four first DMRS ports that share PTRS port 1. It should be noted that the above DMRS port indication method also applies when the number of PUSCH data streams is less than eight.

[0162] Case 2: PTRS port 0, PTRS port 1, PTRS port 2 and PTRS port 3 are configured on the terminal.

[0163] The network side device can indicate the DMRS ports associated with PTRS Port 0, PTRS Port 1, PTRS Port 2, and PTRS Port 3 by the PTRS-DMRS association domain in the DCI. Here, the size of the PTRS-DMRS association domain is 4 bits. The first bit from the most significant position in the PTRS-DMRS association domain is used to indicate the DMRS port associated with PTRS Port 0, the second bit is used to indicate the DMRS port associated with PTRS Port 1, the third bit is used to indicate the DMRS port associated with PTRS Port 2, and the fourth bit is used to indicate the DMRS port associated with PTRS Port 3.

[0164] Alternatively, the DMRS port associated with the PTRS port is a DMRS port corresponding to a target codeword, the target codeword being one codeword of the PUSCH transmission.

[0165] Alternatively, if the codeword of the PUSCH transmission is one codeword, the target codeword is the codeword of the PUSCH transmission; and / or If the codewords of the PUSCH transmission include two codewords, the target codeword is the codeword with a relatively larger MCS level among the two codewords of the PUSCH transmission.

[0166] As can be seen, this corresponds to the case where the codeword for PUSCH transmission is one codeword and the number of PUSCH data streams is less than or equal to 4. This corresponds to the case where the codeword for PUSCH transmission includes two codewords and the number L of PUSCH data streams is greater than 4.

[0167] In the embodiment of the present application, when the codeword of the PUSCH transmission includes two codewords, the target codeword is the codeword with a larger MCS level among the two codewords of the PUSCH transmission, that is, the overhead of indicating the PTRS-DMRS association relationship can be reduced by selecting the codeword based on the MCS level.

[0168] Alternatively, if the two codewords have the same MCS level, the target codeword is the first of the two codewords.

[0169] For example, the first codeword may be codeword 0 or the codeword with the smaller index among the two codewords.

[0170] Alternatively, if one PTRS port is configured in the terminal, a DMRS port associated with the PTRS port is one DMRS port among all scheduled DMRS ports corresponding to the target codeword; and / or If the terminal is configured with at least two PTRS ports, the DMRS port associated with each of the PTRS ports is one DMRS port among all DMRS ports that share each of the PTRS ports corresponding to the target codeword.

[0171] For example, if one PTRS port is configured in the terminal, the DMRS port associated with the PTRS port may be one of the first R scheduled DMRS ports corresponding to the target codeword, where R is a positive integer.

[0172] In the following, the embodiments of the present application will be described in different cases as examples, and for convenience of description, the number of PUSCH data streams will be referred to as L hereinafter.

[0173] Case 1: The terminal is configured with one PTRS port (e.g., PTRS port 0).

[0174] When the number of PUSCH data streams is four or less, i.e., when the codeword for PUSCH transmission is one codeword, the network side device can indicate, via the PTRS-DMRS association domain in DCI, that one DMRS port among the first R=L scheduled DMRS ports on the target codeword (i.e., the codeword for PUSCH transmission) is associated with the PTRS port. When the number of PUSCH data streams is greater than four, i.e., when the codeword for PUSCH transmission is two codewords, the network side device can indicate, via the PTRS-DMRS association domain in DCI, that one DMRS port among the first R=P scheduled DMRS ports on the target codeword is associated with the PTRS port. Here, P is a positive integer, and the target codeword is the codeword with a higher MCS level among two codewords for PUSCH transmission. If the MCS levels of the two codewords are the same, the target codeword is the first codeword of the two codewords.

[0175] For example, the network side device can indicate the DMRS port associated with PTRS port 0 by the PTRS-DMRS association domain in the DCI. Here, the size of the PTRS-DMRS association domain is 2 bits. Table 13 shows the correspondence between the indication value in the PTRS-DMRS association domain and the DMRS port, where the DMRS port is the DMRS port on the target codeword.

[0176] [Table 13]

[0177] If the number of PUSCH data streams is ≦4, the codeword for PUSCH transmission is one codeword. In this case, the target codeword is the codeword for PUSCH transmission. If the number of PUSCH data streams is >4, the codeword for PUSCH transmission is two codewords. In this case, the target codeword is the codeword with the larger MCS level among the two codewords. However, if the two codewords have the same MCS level, the target codeword is the first codeword of the two codewords, for example, codeword 0.

[0178] For example, if the number of PUSCH data streams is eight, the codeword for PUSCH transmission is two codewords. In this case, the eight data streams correspond to the eight scheduled first DMRS ports, respectively. If the MCS of the second codeword is relatively large, the PTRS-DMRS association domain indicates that one of the four ports on the second codeword is associated with PTRS port 0.

[0179] For example, if the number of PUSCH data streams is six, the codeword for PUSCH transmission is two codewords. In this case, the six data streams correspond to the six scheduled first DMRS ports, respectively. If the MCS of the second codeword is relatively large, the PTRS-DMRS association domain indicates that one of the three ports on the second codeword is associated with PTRS port 0.

[0180] Case 2: The terminal is configured with two PTRS ports (e.g., PTRS port 0 and PTRS port 1).

[0181] When the number L of PUSCH data streams is 4 or less, i.e., when the codeword of PUSCH transmission is one codeword, the network side device can indicate that DMRS port A is associated with PTRS port 0 and / or that DMRS port B is associated with PTRS port 1 by the PTRS-DMRS association domain in the DCI, where DMRS port A is one DMRS port among all DMRS ports sharing PTRS port 0, and DMRS port B is one DMRS port among all DMRS ports sharing PTRS port 1. When the number L of PUSCH data streams is greater than 4, i.e., when the codeword of PUSCH transmission is two codewords, the network side device can indicate that DMRS port A on the target codeword is associated with PTRS port 0 and / or that DMRS port B on the target codeword is associated with PTRS port 1 by the PTRS-DMRS association domain in the DCI, where DMRS port A is one DMRS port among all DMRS ports that share PTRS port 0 on the target codeword, and DMRS port B is one DMRS port among all DMRS ports that share PTRS port 1 on the target codeword.

[0182] For example, the network side device can indicate the DMRS ports associated with PTRS port 0 and PTRS port 1 by the PTRS-DMRS association domain in the DCI. Here, the size of the PTRS-DMRS association domain is 2 bits. Table 14 shows the correspondence between the indication value in the PTRS-DMRS association domain and the DMRS port, where the DMRS port is the DMRS port on the target codeword.

[0183] [Table 14]

[0184] For example, if there are eight PUSCH data streams, i.e., the codeword for PUSCH transmission is two codewords, the eight data streams correspond to the eight scheduled first DMRS ports, respectively. If the MCS of the second codeword is relatively large, the PTRS-DMRS association domain indicates four ports on the second codeword. Here, the most significant bit of the PTRS-DMRS association domain indicates one of the two ports sharing PTRS port 0 on the second codeword, and the least significant bit of the PTRS-DMRS association domain indicates one of the two ports sharing PTRS port 1 on the second codeword.

[0185] Case 3: The terminal is configured with four PTRS ports (e.g., PTRS port 0, PTRS port 1, PTRS port 2 and PTRS port 3).

[0186] In this case, DMRS Port A is associated with PTRS Port 0, DMRS Port B is associated with PTRS Port 1, DMRS Port C is associated with PTRS Port 2, and DMRS Port D is associated with PTRS Port 3. DMRS Port A, DMRS Port B, DMRS Port C, and DMRS Port D are all DMRS ports on the target codeword. Here, if the number of PUSCH data streams is four or less, the target codeword is one codeword of PUSCH transmission, for example, codeword 0. If the number of PUSCH data streams is more than four, the target codeword is the codeword with the larger MCS level of two codewords of PUSCH transmission, and if the two codewords have the same MCS level, the target codeword is the first codeword of the two codewords, for example, codeword 0.

[0187] For example, the four configured PTRS ports correspond to four DMRS ports on the target codeword, respectively. For example, if there are eight PUSCH data streams, the PUSCH transmission codeword is two codewords, and the eight data streams correspond to the eight scheduled first DMRS ports, respectively. If the MCS of the second codeword is relatively large, the second codeword is the target codeword. In this case, the four DMRS ports on the second codeword are associated with the four configured PTRS ports, and no indication by the PTRS-DMRS association domain is required.

[0188] Alternatively, when T PTRS ports are configured in the terminal, if DMRS ports associated with at least two of the T PTRS ports correspond to different codewords, the time domain densities of the at least two PTRS ports are determined based on the MCS level of a first codeword, the first codeword being the codeword with the highest or lowest MCS level among the codewords corresponding to the DMRS ports associated with the at least two PTRS ports, and T is an integer greater than or equal to 2.

[0189] For example, if the DMRS ports associated with PTRS Port 0 and PTRS Port 1 correspond to different codewords, the time domain densities of both PTRS Port 0 and PTRS Port 1 are determined based on the MCS level of the first codeword, and as can be seen, in this case the time domain densities of PTRS Port 0 and PTRS Port 1 are the same.

[0190] Optionally, the time domain density of the PTRS port corresponding to the retransmission codeword is the same as the time domain density of the PTRS port corresponding to the initial transmission codeword; Or, The time domain density of the PTRS port corresponding to the retransmission codeword is the same as the time domain density of the PTRS port corresponding to the MCS level of the initially transmitted codeword.

[0191] To summarize, the embodiments of the present application can effectively optimize the PTRS emission power, reduce the collision of PTRS ports between multiple terminals, and provide a PTRS indication and transmission method when the uplink PUSCH employs more data streams, thereby making the phase noise estimation of uplink and downlink data transmission more accurate.

[0192] FIG. 3 is a flowchart of a phase tracking reference signal transmission method according to an embodiment of the present application, which can be performed by a network side device, and as shown in FIG. 3, includes the following steps:

[0193] Step 301: A network side device determines transmission parameters of a PTRS; Step 302: the network side device receives the PTRS based on the transmission parameters, or the network side device transmits the PTRS based on the transmission parameters; wherein the PTRS includes at least one PTRS port, and the transmission parameters include at least one of a frequency domain resource offset of the PTRS port corresponding to a first demodulation reference signal DMRS port, an energy per resource element (EPRE) ratio between the PTRS port and a transmission channel, and a DMRS port associated with the PTRS port; The first DMRS is a DMRS that employs a first frequency-domain orthogonal cover code (FD-OCC) sequence to perform port multiplexing within the same code division multiplexing CDM group, the length of the first FD-OCC sequence is greater than 2, the transport channel includes a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), the maximum number of data streams supported by the PDSCH is greater than 6, the maximum number of data streams supported by the PUSCH is greater than 4, and the DMRS port associated with the PTRS port is used for transmitting the PUSCH.

[0194] As can be seen, for an uplink PTRS, the network side equipment receives a PTRS from the terminal based on the transmission parameters, and for a downlink PTRS, the network side equipment transmits a PTRS to the terminal based on the transmission parameters.

[0195] Optionally, the frequency domain resource offset is: a resource element RE offset; and a resource block RB offset.

[0196] Optionally, the RE offsets of the PTRS ports corresponding to at least two first DMRS ports are different, and the at least two first DMRS ports belong to the same CDM group.

[0197] Optionally, the RE offsets of the PTRS ports corresponding to the at least two first DMRS ports correspond to the increasing order of the at least two first DMRS port indexes and the subcarriers occupied by the at least two first DMRS ports in increasing order.

[0198] Optionally, the RE offsets of the PTRS ports corresponding to some first DMRS ports are the same, and the some first DMRS ports belong to the same CDM group.

[0199] Optionally, a difference value between the port indexes of the portion of first DMRS ports is N, where N is a positive integer.

[0200] Optionally, the RB offset of the PTRS port corresponding to the first port packet is different from the RB offset of the PTRS port corresponding to the second port packet; Or, The RB offset of the PTRS port corresponding to the first port packet is the same as the RB offset of the PTRS port corresponding to the second port packet; Here, the first port packet and the second port packet each include at least one first DMRS port.

[0201] Optionally, if the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet are different, the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet are determined based on first RB offset signaling; Alternatively, a difference value between the RB offset of the PTRS port corresponding to a first port packet and the RB offset of the PTRS port corresponding to a second port packet is determined based on a frequency domain density coefficient of the PTRS port; Or, the difference value between the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet is K, where K is a positive integer.

[0202] Optionally, the first RB offset signaling is used to indicate the RB offset of the PTRS port corresponding to a first port packet and the RB offset of the PTRS port corresponding to a second port packet, respectively; Or, The first RB offset signaling is used to indicate a difference value between the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet.

[0203] Optionally, the EPRE ratio of the PTRS port and the transport channel is a first EPRE ratio on each RE of each data stream of the PTRS port and the PDSCH; The PUSCH and a second EPRE ratio on each RE of each data stream of the PTRS port are included.

[0204] Alternatively, when the DMRS for the PDSCH transmission is a first DMRS, the first EPRE ratio is determined based on the number of data streams of the PDSCH, or the first EPRE ratio is 0 dB.

[0205] Alternatively, if the DMRS for the PUSCH transmission is a first DMRS or a second DMRS, the second EPRE ratio may be: the number of data streams of the PUSCH; Antenna-related capability information of the terminal; and the number of PTRS ports, wherein if the DMRS for the PUSCH transmission is the first DMRS, the maximum number of data streams supported by the PUSCH is 8, and if the DMRS for the PUSCH transmission is the second DMRS, the maximum number of data streams supported by the PUSCH is 6, the second DMRS is a DMRS that employs a second FD-OCC sequence to perform port multiplexing within the same CDM group, and the length of the second FD-OCC sequence is equal to 2.

[0206] Alternatively, when the DMRS for the PUSCH transmission is the first DMRS or the second DMRS, the second EPRE ratios corresponding to different PTRS ports are the same, or the second EPRE ratios corresponding to different PTRS ports are different.

[0207] Alternatively, if one PTRS port is configured in the terminal, a DMRS port associated with the PTRS port is one DMRS port among the first M scheduled DMRS ports, where the value of M is determined based on the number of data streams of the PUSCH; Or, When at least two PTRS ports are configured in the terminal, the DMRS port associated with each PTRS port among the at least two PTRS ports is one DMRS port among all DMRS ports that share each PTRS port.

[0208] Alternatively, if the number of data streams of the PUSCH is four or less, the value of M is the number of data streams of the PUSCH; and / or If the number of data streams of the PUSCH is greater than four, the value of M is four.

[0209] Optionally, the DMRS port associated with each PTRS port of the at least two PTRS ports is one of the first two DMRS ports of all DMRS ports that share the respective PTRS port.

[0210] Alternatively, the DMRS port associated with the PTRS port is a DMRS port corresponding to a target codeword, the target codeword being one codeword of the PUSCH transmission.

[0211] Alternatively, if the codeword of the PUSCH transmission is one codeword, the target codeword is the codeword of the PUSCH transmission; and / or If the codewords of the PUSCH transmission include two codewords, the target codeword is the codeword with a relatively larger modulation and coding policy MCS level among the two codewords of the PUSCH transmission.

[0212] Alternatively, if the two codewords have the same MCS level, the target codeword is the first of the two codewords.

[0213] Alternatively, if one PTRS port is configured in the terminal, a DMRS port associated with the PTRS port is one DMRS port among all scheduled DMRS ports corresponding to the target codeword; and / or If the terminal is configured with at least two PTRS ports, the DMRS port associated with each of the PTRS ports is one DMRS port among all DMRS ports that share each of the PTRS ports corresponding to the target codeword.

[0214] Alternatively, when T PTRS ports are configured in the terminal, if DMRS ports associated with at least two of the T PTRS ports correspond to different codewords, the time domain densities of the at least two PTRS ports are determined based on the MCS level of a first codeword, the first codeword being the codeword with the highest or lowest MCS level among the codewords corresponding to the DMRS ports associated with the at least two PTRS ports, and T is an integer greater than or equal to 2.

[0215] Optionally, the time domain density of the PTRS port corresponding to the retransmission codeword is the same as the time domain density of the PTRS port corresponding to the initial transmission codeword; Or, The time domain density of the PTRS port corresponding to the retransmission codeword is the same as the time domain density of the PTRS port corresponding to the MCS level of the initially transmitted codeword.

[0216] It should be noted that the implementation manner of this embodiment can be referred to the related description of the embodiment shown in FIG. 2, and will not be further described here.

[0217] It should be noted that, in the phase tracking reference signal transmission method according to the embodiment of the present application, the execution body may be a phase tracking reference signal transmission device or a control module for executing the phase tracking reference signal transmission method in the phase tracking reference signal transmission device. In the embodiment of the present application, the phase tracking reference signal transmission device according to the embodiment of the present application will be described by taking the execution of the phase tracking reference signal transmission method by the phase tracking reference signal transmission device as an example.

[0218] FIG. 4 is a structural diagram of a phase tracking reference signal transmission device according to an embodiment of the present application. As shown in FIG. 4, the phase tracking reference signal transmission device 400 includes: a first determination module 401 for determining transmission parameters of a phase tracking reference signal PTRS; a first transmission module 402 for transmitting the PTRS based on the transmission parameters or for the terminal to receive the PTRS based on the transmission parameters, wherein the PTRS includes at least one PTRS port, and the transmission parameters include at least one of a frequency domain resource offset of the PTRS port corresponding to a first demodulation reference signal (DMRS) port, an energy per resource element (EPRE) ratio between the PTRS port and a transmission channel, and a DMRS port associated with the PTRS port; The first DMRS is a DMRS that employs a first frequency-domain orthogonal cover code (FD-OCC) sequence to perform port multiplexing within the same code division multiplexing CDM group, the length of the first FD-OCC sequence is greater than 2, the transport channel includes a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), the maximum number of data streams supported by the PDSCH is greater than 6, the maximum number of data streams supported by the PUSCH is greater than 4, and the DMRS port associated with the PTRS port is used for transmitting the PUSCH.

[0219] Optionally, the frequency domain resource offset is: a resource element RE offset; and a resource block RB offset.

[0220] Optionally, the RE offsets of the PTRS ports corresponding to at least two first DMRS ports are different, and the at least two first DMRS ports belong to the same CDM group.

[0221] Optionally, the RE offsets of the PTRS ports corresponding to the at least two first DMRS ports correspond to the increasing order of the at least two first DMRS port indexes and the subcarriers occupied by the at least two first DMRS ports in increasing order.

[0222] Optionally, the RE offsets of the PTRS ports corresponding to some first DMRS ports are the same, and the some first DMRS ports belong to the same CDM group.

[0223] Optionally, a difference value between the port indexes of the portion of first DMRS ports is N, where N is a positive integer.

[0224] Optionally, the RB offset of the PTRS port corresponding to the first port packet is different from the RB offset of the PTRS port corresponding to the second port packet; Or, The RB offset of the PTRS port corresponding to the first port packet is the same as the RB offset of the PTRS port corresponding to the second port packet; Here, the first port packet and the second port packet each include at least one first DMRS port.

[0225] Optionally, if the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet are different, the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet are determined based on first RB offset signaling; Alternatively, a difference value between the RB offset of the PTRS port corresponding to a first port packet and the RB offset of the PTRS port corresponding to a second port packet is determined based on a frequency domain density coefficient of the PTRS port; Or, the difference value between the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet is K, where K is a positive integer.

[0226] Optionally, the first RB offset signaling is used to indicate the RB offset of the PTRS port corresponding to a first port packet and the RB offset of the PTRS port corresponding to a second port packet, respectively; Or, The first RB offset signaling is used to indicate a difference value between the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet.

[0227] Optionally, the EPRE ratio of the PTRS port and the transport channel is a first EPRE ratio on each RE of each data stream of the PTRS port and the PDSCH; The PUSCH and a second EPRE ratio on each RE of each data stream of the PTRS port are included.

[0228] Alternatively, when the DMRS for the PDSCH transmission is a first DMRS, the first EPRE ratio is determined based on the number of data streams of the PDSCH, or the first EPRE ratio is 0 dB.

[0229] Alternatively, if the DMRS for the PUSCH transmission is a first DMRS or a second DMRS, the second EPRE ratio may be: the number of data streams of the PUSCH; Antenna-related capability information of the terminal; and the number of PTRS ports, wherein if the DMRS for the PUSCH transmission is the first DMRS, the maximum number of data streams supported by the PUSCH is 8, and if the DMRS for the PUSCH transmission is the second DMRS, the maximum number of data streams supported by the PUSCH is 6, the second DMRS is a DMRS that employs a second FD-OCC sequence to perform port multiplexing within the same CDM group, and the length of the second FD-OCC sequence is equal to 2.

[0230] Alternatively, when the DMRS for the PUSCH transmission is the first DMRS or the second DMRS, the second EPRE ratios corresponding to different PTRS ports are the same, or the second EPRE ratios corresponding to different PTRS ports are different.

[0231] Alternatively, if one PTRS port is configured in the terminal, a DMRS port associated with the PTRS port is one DMRS port among the first M scheduled DMRS ports, where the value of M is determined based on the number of data streams of the PUSCH; Or, When at least two PTRS ports are configured in the terminal, the DMRS port associated with each PTRS port among the at least two PTRS ports is one DMRS port among all DMRS ports that share each PTRS port.

[0232] Alternatively, if the number of data streams of the PUSCH is four or less, the value of M is the number of data streams of the PUSCH; and / or If the number of data streams of the PUSCH is greater than four, the value of M is four.

[0233] Optionally, the DMRS port associated with each PTRS port of the at least two PTRS ports is one of the first two DMRS ports of all DMRS ports that share the respective PTRS port.

[0234] Alternatively, the DMRS port associated with the PTRS port is a DMRS port corresponding to a target codeword, the target codeword being one codeword of the PUSCH transmission.

[0235] Alternatively, if the codeword of the PUSCH transmission is one codeword, the target codeword is the codeword of the PUSCH transmission; and / or If the codewords of the PUSCH transmission include two codewords, the target codeword is the codeword with a relatively larger modulation and coding policy MCS level among the two codewords of the PUSCH transmission.

[0236] Alternatively, if the two codewords have the same MCS level, the target codeword is the first of the two codewords.

[0237] Alternatively, if one PTRS port is configured in the terminal, a DMRS port associated with the PTRS port is one DMRS port among all scheduled DMRS ports corresponding to the target codeword; and / or If the terminal is configured with at least two PTRS ports, the DMRS port associated with each of the PTRS ports is one DMRS port among all DMRS ports that share each of the PTRS ports corresponding to the target codeword.

[0238] Alternatively, when T PTRS ports are configured in the terminal, if DMRS ports associated with at least two of the T PTRS ports correspond to different codewords, the time domain densities of the at least two PTRS ports are determined based on the MCS level of a first codeword, the first codeword being the codeword with the highest or lowest MCS level among the codewords corresponding to the DMRS ports associated with the at least two PTRS ports, and T is an integer greater than or equal to 2.

[0239] Optionally, the time domain density of the PTRS port corresponding to the retransmission codeword is the same as the time domain density of the PTRS port corresponding to the initial transmission codeword; Or, The time domain density of the PTRS port corresponding to the retransmission codeword is the same as the time domain density of the PTRS port corresponding to the MCS level of the initially transmitted codeword.

[0240] The phase tracking reference signal transmission device in the embodiments of the present application may be an electronic device, for example, an electronic device having an operating system, or a component of an electronic device, for example, an integrated circuit or a chip. The electronic device may be a terminal or other device other than a terminal. Exemplarily, the terminal may include, but is not limited to, the types of terminals 11 listed above. The other device may be a server, a network attached storage (NAS), etc., and the embodiments of the present application are not specifically limited thereto.

[0241] The phase tracking reference signal transmission device according to the embodiment of the present application can realize each process realized by the embodiment of the method of Figure 2 and achieve the same technical effect, and will not be further described here to avoid repetition of description.

[0242] FIG. 5 is a structural diagram of a phase tracking reference signal transmission device according to an embodiment of the present application. As shown in FIG. 5, the phase tracking reference signal transmission device 500 includes: a second determination module 501 for determining transmission parameters of a phase tracking reference signal PTRS; a second transmission module 502 for receiving the PTRS based on the transmission parameters or for transmitting the PTRS based on the transmission parameters; wherein the PTRS includes at least one PTRS port, and the transmission parameters include at least one of a frequency domain resource offset of the PTRS port corresponding to a first demodulation reference signal DMRS port, an energy per resource element (EPRE) ratio between the PTRS port and a transmission channel, and a DMRS port associated with the PTRS port; The first DMRS is a DMRS that employs a first frequency-domain orthogonal cover code (FD-OCC) sequence to perform port multiplexing within the same code division multiplexing CDM group, the length of the first FD-OCC sequence is greater than 2, the transport channel includes a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), the maximum number of data streams supported by the PDSCH is greater than 6, the maximum number of data streams supported by the PUSCH is greater than 4, and the DMRS port associated with the PTRS port is used for transmitting the PUSCH.

[0243] Optionally, the frequency domain resource offset is: a resource element RE offset; and a resource block RB offset.

[0244] Optionally, the RE offsets of the PTRS ports corresponding to at least two first DMRS ports are different, and the at least two first DMRS ports belong to the same CDM group.

[0245] Optionally, the RE offsets of the PTRS ports corresponding to the at least two first DMRS ports correspond to the increasing order of the at least two first DMRS port indexes and the subcarriers occupied by the at least two first DMRS ports in increasing order.

[0246] Optionally, the RE offsets of the PTRS ports corresponding to some first DMRS ports are the same, and the some first DMRS ports belong to the same CDM group.

[0247] Optionally, a difference value between the port indexes of the portion of first DMRS ports is N, where N is a positive integer.

[0248] Optionally, the RB offset of the PTRS port corresponding to the first port packet is different from the RB offset of the PTRS port corresponding to the second port packet; Or, The RB offset of the PTRS port corresponding to the first port packet is the same as the RB offset of the PTRS port corresponding to the second port packet; Here, the first port packet and the second port packet each include at least one first DMRS port.

[0249] Optionally, if the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet are different, the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet are determined based on first RB offset signaling; Alternatively, a difference value between the RB offset of the PTRS port corresponding to a first port packet and the RB offset of the PTRS port corresponding to a second port packet is determined based on a frequency domain density coefficient of the PTRS port; Or, the difference value between the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet is K, where K is a positive integer.

[0250] Optionally, the first RB offset signaling is used to indicate the RB offset of the PTRS port corresponding to a first port packet and the RB offset of the PTRS port corresponding to a second port packet, respectively; Or, The first RB offset signaling is used to indicate a difference value between the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet.

[0251] Optionally, the EPRE ratio of the PTRS port and the transport channel is a first EPRE ratio on each RE of each data stream of the PTRS port and the PDSCH; The PUSCH and a second EPRE ratio on each RE of each data stream of the PTRS port are included.

[0252] Alternatively, when the DMRS for the PDSCH transmission is a first DMRS, the first EPRE ratio is determined based on the number of data streams of the PDSCH, or the first EPRE ratio is 0 dB.

[0253] Alternatively, if the DMRS for the PUSCH transmission is a first DMRS or a second DMRS, the second EPRE ratio may be: the number of data streams of the PUSCH; Antenna-related capability information of the terminal; and the number of PTRS ports, wherein if the DMRS for the PUSCH transmission is the first DMRS, the maximum number of data streams supported by the PUSCH is 8, and if the DMRS for the PUSCH transmission is the second DMRS, the maximum number of data streams supported by the PUSCH is 6, the second DMRS is a DMRS that employs a second FD-OCC sequence to perform port multiplexing within the same CDM group, and the length of the second FD-OCC sequence is equal to 2.

[0254] Alternatively, when the DMRS for the PUSCH transmission is the first DMRS or the second DMRS, the second EPRE ratios corresponding to different PTRS ports are the same, or the second EPRE ratios corresponding to different PTRS ports are different.

[0255] Alternatively, if one PTRS port is configured in the terminal, a DMRS port associated with the PTRS port is one DMRS port among the first M scheduled DMRS ports, where the value of M is determined based on the number of data streams of the PUSCH; Or, When at least two PTRS ports are configured in the terminal, the DMRS port associated with each PTRS port among the at least two PTRS ports is one DMRS port among all DMRS ports that share each PTRS port.

[0256] Alternatively, if the number of data streams of the PUSCH is four or less, the value of M is the number of data streams of the PUSCH; and / or If the number of data streams of the PUSCH is greater than four, the value of M is four.

[0257] Optionally, the DMRS port associated with each PTRS port of the at least two PTRS ports is one of the first two DMRS ports of all DMRS ports that share the respective PTRS port.

[0258] Alternatively, the DMRS port associated with the PTRS port is a DMRS port corresponding to a target codeword, the target codeword being one codeword of the PUSCH transmission.

[0259] Alternatively, if the codeword of the PUSCH transmission is one codeword, the target codeword is the codeword of the PUSCH transmission; and / or If the codewords of the PUSCH transmission include two codewords, the target codeword is the codeword with a relatively larger modulation and coding policy MCS level among the two codewords of the PUSCH transmission.

[0260] Alternatively, if the two codewords have the same MCS level, the target codeword is the first of the two codewords.

[0261] Alternatively, if one PTRS port is configured in the terminal, a DMRS port associated with the PTRS port is one DMRS port among all scheduled DMRS ports corresponding to the target codeword; and / or If the terminal is configured with at least two PTRS ports, the DMRS port associated with each of the PTRS ports is one DMRS port among all DMRS ports that share each of the PTRS ports corresponding to the target codeword.

[0262] Alternatively, when T PTRS ports are configured in the terminal, if DMRS ports associated with at least two of the T PTRS ports correspond to different codewords, the time domain densities of the at least two PTRS ports are determined based on the MCS level of a first codeword, the first codeword being the codeword with the highest or lowest MCS level among the codewords corresponding to the DMRS ports associated with the at least two PTRS ports, and T is an integer greater than or equal to 2.

[0263] Optionally, the time domain density of the PTRS port corresponding to the retransmission codeword is the same as the time domain density of the PTRS port corresponding to the initial transmission codeword; Or, The time domain density of the PTRS port corresponding to the retransmission codeword is the same as the time domain density of the PTRS port corresponding to the MCS level of the initially transmitted codeword.

[0264] The phase tracking reference signal transmission device in the embodiments of the present application may be an electronic device, for example, an electronic device having an operating system, or a component of an electronic device, for example, an integrated circuit or a chip. This electronic device may be a network-side device or other device other than the network-side device. Exemplarily, the network-side device may include, but is not limited to, the types of network-side device 12 listed above. Other devices may be, for example, a server, a network-attached storage (NAS), etc., and the embodiments of the present application are not specifically limited thereto.

[0265] The phase tracking reference signal transmission device according to the embodiment of the present application can realize each process realized by the embodiment of the method of Figure 3 and achieve the same technical effect, and will not be further described here to avoid repetition of description.

[0266] Optionally, as shown in Fig. 6, an embodiment of the present application further provides a communication device 600, which includes a processor 601 and a memory 602, and the memory 602 stores a program or instruction that can run on the processor 601. For example, if the communication device 600 is a terminal, when the program or instruction is executed by the processor 601, it can realize each step of the embodiment of the phase tracking reference signal transmission method and achieve the same technical effect. If the communication device 600 is a network-side device, when the program or instruction is executed by the processor 601, it can realize each step of the embodiment of the phase tracking reference signal transmission method and achieve the same technical effect, and in order to avoid repetition, it will not be described further here.

[0267] An embodiment of the present application further provides a terminal, which includes a processor and a communication interface, wherein the processor is used to determine transmission parameters of a phase tracking reference signal (PTRS), and the communication interface is used to transmit the PTRS based on the transmission parameters or receive the PTRS based on the transmission parameters. wherein the PTRS includes at least one PTRS port, and the transmission parameters include at least one of a frequency-domain resource offset of the PTRS port corresponding to a first demodulation reference signal (DMRS) port, an energy per resource element (EPRE) ratio between the PTRS port and a transport channel, and a DMRS port associated with the PTRS port, the first DMRS is a DMRS employing a first frequency-domain orthogonal cover code (FD-OCC) sequence to perform port multiplexing within the same code division multiplexing (CDM) group, the length of the first FD-OCC sequence being greater than 2, the transport channel including a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), the maximum number of data streams supported by the PDSCH being greater than 6, the maximum number of data streams supported by the PUSCH being greater than 4, and the DMRS port associated with the PTRS port is used for transmitting the PUSCH. This terminal embodiment corresponds to the terminal-side method embodiment, and the implementation processes and realization manners of the method embodiments can all be applied to this terminal embodiment, while achieving the same technical effects. Specifically, FIG. 7 is a schematic diagram of the hardware structure for implementing the terminal of the embodiment of the present application.

[0268] The terminal 700 includes at least some components such as, but not limited to, a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709 and a processor 710.

[0269] As will be understood by those skilled in the art, the terminal 700 may further include a power source (e.g., a battery) for powering each component, and the power source may be logically connected to the processor 710 by a power management system, thereby enabling the power management system to realize functions such as charge / discharge management and power consumption management. The terminal structure shown in Figure 7 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than those shown, or a combination of some components, or a different arrangement of components, which will not be further described here.

[0270] It should be understood that in the embodiment of the present application, the input unit 704 may include a graphics processing unit (GPU) 7041 and a microphone 7042, and the graphics processor 7041 processes image data of still or video images captured by an image capture device (e.g., a camera) in a video capture mode or an image capture mode. The display unit 706 may include a display panel 7061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 707 includes at least one of a touch panel 7071 and other input devices 7072. The touch panel 7071 is also called a touch screen. The touch panel 7071 may include two parts: a touch detection device and a touch controller. The other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control buttons, switch buttons, etc.), a trackball, a mouse, and a control lever, which will not be further described herein.

[0271] In the embodiment of the present application, the radio frequency unit 701 can receive downlink data from the network side device and then transmit the data to the processor 710 for processing, and can also transmit uplink data to the network side device. Generally, the radio frequency unit 701 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0272] The memory 709 may be used to store software programs or instructions and various data. The memory 709 may include a first storage area that mainly stores programs or instructions and a second storage area that stores data. Here, the first storage area may store an operating system, an application program or instructions necessary for at least one function (e.g., an audio playback function, an image playback function, etc.), etc. The memory 709 may include volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. Here, the nonvolatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory may be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct Rambus random access memory (DRRAM). Memory 709 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

[0273] The processor 710 may include one or more processing units. Optionally, the processor 710 may integrate an application processor and a modem processor, where the application processor mainly processes operations related to the operating system, user interface, application programs, etc., and the modem processor mainly processes wireless communication signals, e.g., a baseband processor. As can be appreciated, the modem processor may not be integrated into the processor 710.

[0274] wherein the processor 710 is used to determine transmission parameters of the phase tracking reference signal PTRS; The radio frequency unit 701 is used to transmit the PTRS based on the transmission parameters or receive the PTRS based on the transmission parameters, where the PTRS includes at least one PTRS port, and the transmission parameters include at least one of a frequency-domain resource offset of the PTRS port corresponding to a first demodulation reference signal (DMRS) port, an energy per resource element (EPRE) ratio between the PTRS port and a transport channel, and a DMRS port associated with the PTRS port, where the first DMRS is a DMRS that employs a first frequency-domain orthogonal cover code (FD-OCC) sequence to perform port multiplexing within the same code division multiplexing CDM group, and the length of the first FD-OCC sequence is greater than 2, the transport channel includes a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), where the maximum number of data streams supported by the PDSCH is greater than 6 and the maximum number of data streams supported by the PUSCH is greater than 4, and the DMRS port associated with the PTRS port is used for the PUSCH transmission.

[0275] It should be understood that this terminal embodiment can implement each process implemented by the above terminal-side method embodiment and achieve the same technical effect, and will not be further described here to avoid repetition.

[0276] An embodiment of the present application further provides a network side device, including a processor and a communication interface, wherein the processor is used to determine transmission parameters of a phase tracking reference signal (PTRS), and the communication interface is used to receive the PTRS based on the transmission parameters or transmit the PTRS based on the transmission parameters, where the PTRS includes at least one PTRS port, and the transmission parameters include at least one of a frequency-domain resource offset of the PTRS port corresponding to a first demodulation reference signal (DMRS) port, an energy per resource element (EPRE) ratio between the PTRS port and a transmission channel, and a DMRS port associated with the PTRS port, and the first DMRS is a DMRS that employs a first frequency-domain orthogonal cover code (FD-OCC) sequence to perform port multiplexing within the same code division multiplexing (CDM) group. The length of the first FD-OCC sequence is greater than 2, the transport channel includes a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), the maximum number of data streams supported by the PDSCH is greater than 6, the maximum number of data streams supported by the PUSCH is greater than 4, and a DMRS port associated with the PTRS port is used for transmitting the PUSCH. This embodiment of the network side equipment corresponds to the embodiment of the method of the above-mentioned network side equipment, and the implementation processes and realization manners of the embodiment of the method can all be applied to this embodiment of the network side equipment, and the same technical effects can be achieved.

[0277] Specifically, an embodiment of the present application further provides a network side device. As shown in Fig. 8, the network side device 800 includes an antenna 801, a radio frequency device 802, a baseband device 803, a processor 804, and a memory 805. The antenna 801 and the radio frequency device 802 are connected. In the uplink direction, the radio frequency device 802 receives information through the antenna 801 and transmits the received information to the baseband device 803 for processing. In the downlink direction, the baseband device 803 processes the information to be transmitted and transmits it to the radio frequency device 802, and the radio frequency device 802 processes the received information and then transmits it through the antenna 801.

[0278] The methods performed by the network side equipment in the above embodiments may be implemented in the baseband device 803, which includes a baseband processor.

[0279] The baseband device 803 may, for example, include at least one baseband board, on which multiple chips are installed, and as shown in FIG. 8, one of the chips is, for example, a baseband processor, which is connected to a memory 805 via a bus interface, and calls the program in the memory 805 to perform the network equipment operations shown in the above method embodiments.

[0280] The network side device may further include a network interface 806, which may be, for example, a common public radio interface (CPRI).

[0281] Specifically, the network side device 800 of the embodiment of the present invention further includes instructions or programs stored in the memory 805 and operable on the processor 804, and the processor 804 calls the instructions or programs in the memory 805 to execute the methods performed by each module shown in FIG. 5, thereby achieving the same technical effects, which will not be further described here to avoid repetition.

[0282] An embodiment of the present application further provides a readable storage medium, which stores a program or instruction, and when the program or instruction is executed by a processor, it can realize each process of the embodiment of the phase tracking reference signal transmission method and achieve the same technical effect, and in order to avoid repetition, it will not be further described here.

[0283] Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0284] An embodiment of the present application further provides a chip, the chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor running a program or instruction to realize each process of the embodiment of the phase tracking reference signal transmission method, and achieving the same technical effect, which will not be further described here to avoid repetition.

[0285] It should be understood that the chips referred to in the embodiments of this application may be referred to as system level chips, system chips, chip systems, or system-on-chips.

[0286] The embodiments of the present application further provide a computer program / program product, which is stored in a storage medium and can be executed by at least one processor to realize each process of the embodiments of the phase tracking reference signal transmission method and achieve the same technical effects, and will not be described further here to avoid repetition.

[0287] An embodiment of the present application further provides a phase tracking reference signal transmission system, which includes a terminal and a network side device, wherein the terminal is used to perform each process of the embodiments of FIG. 2 and the above methods, and the network side device is used to perform each process of the embodiments of FIG. 3 and the above methods, and can achieve the same technical effects, and in order to avoid repetition, no further description will be given here.

[0288] It should be noted that, in this specification, the terms "comprises," "including," and any other variations thereof are intended to cover the non-exclusive "comprises," whereby a process, method, article, or apparatus comprising a set of elements not only includes those elements but also other elements not expressly listed or inherent in such process, method, article, or apparatus. Absent further limitations, an element limited by the phrase "comprises one of," does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising that element. It should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may include performing functions in an essentially simultaneous manner or in the reverse order based on the functions involved. For example, the described method may be performed in a different order than described, and various steps may be added, omitted, or combined. Furthermore, features described with reference to some examples may be combined in other examples.

[0289] As will be apparent to those skilled in the art from the above description of the embodiments, the methods of the above embodiments can be realized in the form of software and a necessary general-purpose hardware platform. Of course, they can also be realized in hardware, but in many cases the former is a more preferred embodiment. Based on this understanding, the technical proposal of the present application, in substance or in part contributing to the prior art, may be embodied in the form of a computer software product, which is stored in a storage medium (e.g., ROM / RAM, magnetic disk, optical disk) and includes a number of instructions for causing a terminal (which may be a mobile phone, computer, server, air conditioner, network device, etc.) to execute the methods described in each embodiment of the present application.

[0290] Although the embodiments of the present application have been described above in conjunction with the drawings, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not limiting. Those skilled in the art can take the teachings of the present application into account and implement many forms without departing from the spirit and scope of the claims, all of which fall within the scope of protection of the present application.

Claims

1. A phase tracking reference signal (PTRS) transmission method, comprising: The terminal determines transmission parameters of the PTRS; The terminal transmits the PTRS based on the transmission parameters, or the terminal receives the PTRS based on the transmission parameters; The PTRS includes at least one PTRS port, and the transmission parameters include at least one of a frequency domain resource offset of the PTRS port corresponding to a first demodulation reference signal (DMRS) port, an energy per resource element (EPRE) ratio between the PTRS port and a transmission channel, and a DMRS port associated with the PTRS port; a phase tracking reference signal (PTRS) transmission method, in which the first DMRS is a DMRS that employs a first frequency domain orthogonal cover code (FD-OCC) sequence to perform port multiplexing within the same code division multiplexing (CDM) group, the length of the first FD-OCC sequence is greater than 2, the transport channel includes a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), the maximum number of data streams supported by the PDSCH is greater than 6, the maximum number of data streams supported by the PUSCH is greater than 4, and the DMRS port associated with the PTRS port is used for the PUSCH transmission.

2. The frequency domain resource offset is resource element RE offset; and The method of claim 1 , further comprising at least one of: a resource block offset; and a resource block offset.

3. 3. The phase tracking reference signal PTRS transmission method of claim 2, wherein the RE offsets of the PTRS ports corresponding to at least two first DMRS ports are different, and the at least two first DMRS ports belong to the same CDM group.

4. 4. The phase tracking reference signal PTRS transmission method of claim 3, wherein the RE offsets of the PTRS ports corresponding to the at least two first DMRS ports correspond in increasing order to the subcarriers occupied by the at least two first DMRS ports in the increasing order of the at least two first DMRS port indexes.

5. 3. The phase tracking reference signal PTRS transmission method of claim 2, wherein the RE offsets of the PTRS ports corresponding to some first DMRS ports are the same, and the some first DMRS ports belong to the same CDM group.

6. The phase tracking reference signal (PTRS) transmission method according to claim 5 , wherein a difference value between the port indexes of the part of first DMRS ports is N, where N is a positive integer.

7. The RB offset of the PTRS port corresponding to the first port packet is different from the RB offset of the PTRS port corresponding to the second port packet; Or, The RB offset of the PTRS port corresponding to the first port packet is the same as the RB offset of the PTRS port corresponding to the second port packet; The phase tracking reference signal (PTRS) transmission method according to claim 2 , wherein the first port packet and the second port packet each include at least one first DMRS port.

8. When the RB offset of the PTRS port corresponding to the first port packet is different from the RB offset of the PTRS port corresponding to the second port packet, the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet are determined based on first RB offset signaling; Alternatively, a difference value between the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet is determined based on a frequency domain density coefficient of the PTRS port; Or, the difference value between the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet is K, where K is a positive integer.

9. The first RB offset signaling is used to indicate an RB offset of the PTRS port corresponding to a first port packet and an RB offset of the PTRS port corresponding to a second port packet, respectively; Or, 9. The phase tracking reference signal PTRS transmission method of claim 8, wherein the first RB offset signaling is used to indicate a difference value between the RB offset of the PTRS port corresponding to a first port packet and the RB offset of the PTRS port corresponding to a second port packet.

10. The EPRE ratio of the PTRS port and the transport channel is a first EPRE ratio on each RE of each data stream of the PTRS port and the PDSCH; 10. The method of claim 1, further comprising one of the PUSCH and a second EPRE ratio on each RE of each data stream of the PTRS port.

11. 11. The phase tracking reference signal PTRS transmission method of claim 10, wherein when the DMRS for the PDSCH transmission is the first DMRS, the first EPRE ratio is determined based on the number of data streams of the PDSCH, or the first EPRE ratio is 0 dB.

12. When the DMRS for the PUSCH transmission is the first DMRS or the second DMRS, the second EPRE ratio is The number of data streams of the PUSCH; Antenna-related capability information of the terminal; and the number of PTRS ports; 11. The phase tracking reference signal PTRS transmission method of claim 10, wherein when the DMRS for the PUSCH transmission is the first DMRS, the maximum number of data streams supported by the PUSCH is 8, and when the DMRS for the PUSCH transmission is the second DMRS, the maximum number of data streams supported by the PUSCH is 6, the second DMRS is a DMRS that employs a second FD-OCC sequence to perform port multiplexing within the same CDM group, and the length of the second FD-OCC sequence is equal to 2.

13. 13. The phase tracking reference signal PTRS transmission method of claim 12, wherein when the DMRS for the PUSCH transmission is a first DMRS or a second DMRS, the second EPRE ratios corresponding to different PTRS ports are the same, or the second EPRE ratios corresponding to different PTRS ports are different.

14. If one PTRS port is configured in the terminal, a DMRS port associated with the PTRS port is one of the first M scheduled DMRS ports, and the value of M is determined based on the number of data streams of the PUSCH; Or, 10. The phase tracking reference signal PTRS transmission method according to claim 1, wherein, when at least two PTRS ports are configured in the terminal, a DMRS port associated with each PTRS port among the at least two PTRS ports is one DMRS port among all DMRS ports that share each PTRS port.

15. If the number of data streams of the PUSCH is 4 or less, the value of M is the number of data streams of the PUSCH; and / or The method of claim 14 , wherein if the number of data streams of the PUSCH is greater than four, the value of M is four.

16. 15. The phase tracking reference signal PTRS transmission method of claim 14, wherein the DMRS port associated with each PTRS port among the at least two PTRS ports is one of the first two DMRS ports among all DMRS ports that share the respective PTRS port.

17. 10. The phase tracking reference signal PTRS transmission method according to claim 1, wherein the DMRS port associated with the PTRS port is a DMRS port corresponding to a target codeword, and the target codeword is one codeword of the PUSCH transmission.

18. If the codeword of the PUSCH transmission is one codeword, the target codeword is the codeword of the PUSCH transmission; and / or 18. The method of claim 17, wherein, when the codewords of the PUSCH transmission include two codewords, the target codeword is a codeword having a relatively higher modulation and coding policy MCS level among the two codewords of the PUSCH transmission.

19. 19. The method of claim 18, wherein if the two codewords have the same MCS level, the target codeword is the first codeword of the two codewords.

20. If one PTRS port is configured in the terminal, a DMRS port associated with the PTRS port is one DMRS port among all scheduled DMRS ports corresponding to the target codeword; and / or 18. The phase tracking reference signal PTRS transmission method of claim 17, wherein, when at least two PTRS ports are configured in the terminal, the DMRS port associated with each PTRS port is one DMRS port among all DMRS ports that share each PTRS port corresponding to the target codeword.

21. 21. The phase tracking reference signal PTRS transmission method according to claim 1, wherein, when T PTRS ports are configured in the terminal, if DMRS ports associated with at least two of the T PTRS ports correspond to different codewords, the time domain densities of the at least two PTRS ports are determined based on an MCS level of a first codeword, the first codeword being a codeword with the highest or lowest MCS level among the codewords corresponding to the DMRS ports associated with the at least two PTRS ports, and T is an integer greater than or equal to 2.

22. the time-domain density of the PTRS port corresponding to the retransmission codeword is the same as the time-domain density of the PTRS port corresponding to the initial transmission codeword; Or, 22. The phase tracking reference signal PTRS transmission method according to claim 1, wherein the time domain density of the PTRS port corresponding to the retransmission codeword is the same as the time domain density of the PTRS port corresponding to the MCS level of the initial transmission codeword.

23. A phase tracking reference signal transmission method, comprising: The network side device determines transmission parameters of a phase tracking reference signal (PTRS); The network side device receives the PTRS based on the transmission parameters, or the network side device transmits the PTRS based on the transmission parameters; The PTRS includes at least one PTRS port, and the transmission parameters include at least one of a frequency domain resource offset of the PTRS port corresponding to a first demodulation reference signal (DMRS) port, an energy per resource element (EPRE) ratio between the PTRS port and a transmission channel, and a DMRS port associated with the PTRS port; a phase tracking reference signal transmission method, in which the first DMRS is a DMRS that adopts a first frequency domain orthogonal cover code (FD-OCC) sequence to perform port multiplexing within the same code division multiplexing (CDM) group, the length of the first FD-OCC sequence is greater than 2, the transport channel includes a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), the maximum number of data streams supported by the PDSCH is greater than 6, the maximum number of data streams supported by the PUSCH is greater than 4, and a DMRS port associated with the PTRS port is used for the PUSCH transmission.

24. The frequency domain resource offset is resource element RE offset; and 24. The phase tracking reference signal transmission method of claim 23, comprising at least one of: a resource block offset;

25. 25. The phase tracking reference signal transmission method of claim 24, wherein the RE offsets of the PTRS ports corresponding to at least two first DMRS ports are different, and the at least two first DMRS ports belong to the same CDM group.

26. 26. The phase tracking reference signal transmission method of claim 25, wherein the RE offsets of the PTRS ports corresponding to the at least two first DMRS ports correspond in increasing order to the subcarriers occupied by the at least two first DMRS ports in the increasing order of the at least two first DMRS port indexes.

27. 25. The phase tracking reference signal transmission method of claim 24, wherein the RE offsets of the PTRS ports corresponding to some first DMRS ports are the same, and the some first DMRS ports belong to the same CDM group.

28. 28. The phase tracking reference signal transmission method of claim 27, wherein a difference value between the port indexes of the part of first DMRS ports is N, where N is a positive integer.

29. The RB offset of the PTRS port corresponding to the first port packet is different from the RB offset of the PTRS port corresponding to the second port packet; Or, The RB offset of the PTRS port corresponding to the first port packet is the same as the RB offset of the PTRS port corresponding to the second port packet; 25. The phase tracking reference signal transmission method of claim 24, wherein the first port packet and the second port packet each include at least one first DMRS port.

30. When the RB offset of the PTRS port corresponding to the first port packet is different from the RB offset of the PTRS port corresponding to the second port packet, the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet are determined based on first RB offset signaling; Alternatively, a difference value between the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet is determined based on a frequency domain density coefficient of the PTRS port; Or, the difference value between the RB offset of the PTRS port corresponding to the first port packet and the RB offset of the PTRS port corresponding to the second port packet is K, where K is a positive integer.

31. The first RB offset signaling is used to indicate an RB offset of the PTRS port corresponding to a first port packet and an RB offset of the PTRS port corresponding to a second port packet, respectively; Or, 31. The phase tracking reference signal transmission method of claim 30, wherein the first RB offset signaling is used to indicate a difference value between the RB offset of the PTRS port corresponding to a first port packet and the RB offset of the PTRS port corresponding to a second port packet.

32. The EPRE ratio of the PTRS port and the transport channel is a first EPRE ratio on each RE of each data stream of the PTRS port and the PDSCH; 32. The method of claim 23, further comprising one of the PUSCH and a second EPRE ratio on each RE of each data stream of the PTRS port.

33. 33. The phase tracking reference signal transmission method of claim 32, wherein, when the DMRS for the PDSCH transmission is a first DMRS, the first EPRE ratio is determined based on the number of data streams of the PDSCH, or the first EPRE ratio is 0 dB.

34. When the DMRS for the PUSCH transmission is the first DMRS or the second DMRS, the second EPRE ratio is The number of data streams of the PUSCH; Antenna-related capability information of the terminal; and the number of PTRS ports; 33. The phase tracking reference signal transmission method of claim 32, wherein, when the DMRS for the PUSCH transmission is the first DMRS, the maximum number of data streams supported by the PUSCH is 8, and when the DMRS for the PUSCH transmission is the second DMRS, the maximum number of data streams supported by the PUSCH is 6, the second DMRS is a DMRS that employs a second FD-OCC sequence to perform port multiplexing within the same CDM group, and the length of the second FD-OCC sequence is equal to 2.

35. 35. The phase tracking reference signal transmission method of claim 34, wherein, when the DMRS for the PUSCH transmission is the first DMRS or the second DMRS, second EPRE ratios corresponding to different PTRS ports are the same, or second EPRE ratios corresponding to different PTRS ports are different.

36. When one PTRS port is configured in the terminal, the DMRS port associated with the PTRS port is one of the first M scheduled DMRS ports, and the value of M is determined based on the number of data streams of the PUSCH; Or, 32. A phase tracking reference signal transmission method according to claim 23, wherein, when at least two PTRS ports are configured in a terminal, a DMRS port associated with each PTRS port among the at least two PTRS ports is one DMRS port among all DMRS ports that share each PTRS port.

37. If the number of data streams of the PUSCH is 4 or less, the value of M is the number of data streams of the PUSCH; and / or The method of claim 36, wherein if the number of data streams of the PUSCH is greater than four, the value of M is four.

38. 37. The phase tracking reference signal transmission method of claim 36, wherein a DMRS port associated with each PTRS port among the at least two PTRS ports is one of the first two DMRS ports among all DMRS ports that share the respective PTRS port.

39. 32. The method of claim 23, wherein the DMRS port associated with the PTRS port is a DMRS port corresponding to a target codeword, and the target codeword is one codeword of the PUSCH transmission.

40. If the codeword of the PUSCH transmission is one codeword, the target codeword is the codeword of the PUSCH transmission; and / or 40. The method of claim 39, wherein, when the codewords of the PUSCH transmission include two codewords, the target codeword is a codeword having a relatively higher modulation and coding policy MCS level among the two codewords of the PUSCH transmission.

41. 41. The method of claim 40, wherein if the two codewords have the same MCS level, the target codeword is the first codeword of the two codewords.

42. If one PTRS port is configured in the terminal, the DMRS port associated with the PTRS port is one DMRS port among all scheduled DMRS ports corresponding to the target codeword; and / or 40. The phase tracking reference signal transmission method of claim 39, wherein, when at least two PTRS ports are configured in a terminal, a DMRS port associated with each of the PTRS ports is one DMRS port among all DMRS ports that share each of the PTRS ports corresponding to the target codeword.

43. 43. The phase tracking reference signal transmission method of claim 23, wherein when T PTRS ports are configured in a terminal, if DMRS ports associated with at least two of the T PTRS ports correspond to different codewords, the time domain densities of the at least two PTRS ports are determined based on an MCS level of a first codeword, the first codeword being the codeword with the highest or lowest MCS level among the codewords corresponding to the DMRS ports associated with the at least two PTRS ports, and T is an integer greater than or equal to 2.

44. the time-domain density of the PTRS port corresponding to the retransmission codeword is the same as the time-domain density of the PTRS port corresponding to the initial transmission codeword; Or, 44. The method of claim 23, wherein the time domain density of the PTRS port corresponding to the retransmission codeword is the same as the time domain density of the PTRS port corresponding to the MCS level of the initially transmitted codeword.

45. A phase tracking reference signal transmission device, a first determination module for determining transmission parameters of a phase tracking reference signal PTRS; a first transmission module for transmitting the PTRS based on the transmission parameters or for receiving the PTRS based on the transmission parameters; The PTRS includes at least one PTRS port, and the transmission parameters include at least one of a frequency domain resource offset of the PTRS port corresponding to a first demodulation reference signal (DMRS) port, an energy per resource element (EPRE) ratio between the PTRS port and a transmission channel, and a DMRS port associated with the PTRS port; a phase tracking reference signal transmission device, wherein the first DMRS is a DMRS that employs a first frequency domain orthogonal cover code (FD-OCC) sequence to perform port multiplexing within the same code division multiplexing (CDM) group, the length of the first FD-OCC sequence is greater than 2, the transmission channel includes a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), the maximum number of data streams supported by the PDSCH is greater than 6, the maximum number of data streams supported by the PUSCH is greater than 4, and a DMRS port associated with the PTRS port is used for transmitting the PUSCH.

46. A phase tracking reference signal transmission device, a second determination module for determining transmission parameters of a phase tracking reference signal PTRS; a second transmission module for receiving the PTRS based on the transmission parameters or transmitting the PTRS based on the transmission parameters; The PTRS includes at least one PTRS port, and the transmission parameters include at least one of a frequency domain resource offset of the PTRS port corresponding to a first demodulation reference signal (DMRS) port, an energy per resource element (EPRE) ratio between the PTRS port and a transmission channel, and a DMRS port associated with the PTRS port; a phase tracking reference signal transmission device, wherein the first DMRS is a DMRS that employs a first frequency domain orthogonal cover code (FD-OCC) sequence to perform port multiplexing within the same code division multiplexing (CDM) group, the length of the first FD-OCC sequence is greater than 2, the transmission channel includes a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), the maximum number of data streams supported by the PDSCH is greater than 6, the maximum number of data streams supported by the PUSCH is greater than 4, and a DMRS port associated with the PTRS port is used for transmitting the PUSCH.

47. A terminal comprising a processor and a memory, the memory storing a program or instructions operable on the processor, the program or instructions implementing the steps of the phase tracking reference signal transmission method of any one of claims 1 to 22 when executed by the processor.

48. A network side device comprising a processor and a memory, the memory storing a program or instructions operable on the processor, the program or instructions implementing the steps of the phase tracking reference signal transmission method of any one of claims 23 to 44 when executed by the processor.

49. 23. A readable storage medium having a program or instructions stored therein, the program or instructions, when executed by a processor, implementing the steps of a phase tracking reference signal transmission method according to any one of claims 1 to 22, or implementing the steps of a phase tracking reference signal transmission method according to any one of claims 23 to 44.

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