Reference signal transmission method and apparatus, communication device, and storage medium

Abstract

The present disclosure relates to a reference signal transmission method and device, communication equipment and storage medium, and relates to the technical field of communication, and is used for improving the estimation accuracy of phase noise source. The method comprises the following steps: determining that the number of antenna groups of the terminal is maximally 4, determining that the maximum PTRS port number is N, N is a positive integer; determining that the phase tracking reference signal PTRS-demodulation reference signal DMRS association relationship indication field is not included in the downlink control information DCI, and the transmission layer indication TRI indicated by the DCI is greater than 1; determining the association relationship between the M PTRS ports corresponding to the actual transmission of the terminal PTRS reference signal and the DMRS ports, M is a positive integer less than or equal to N; and transmitting the PTRS reference signal based on the DMRS ports respectively associated with the M PTRS ports.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of communication, and particularly relates to a reference signal transmission method and device, a communication device and a storage medium. BACKGROUND

[0002] In order to improve the effectiveness of transmission, high-order modulation is often used, and the higher the modulation order is, the more sensitive to phase noise it is. Generally, a terminal can send a reference signal, and a network device estimates phase noise based on the reference signal. SUMMARY

[0003] The present disclosure provides a reference signal transmission method and device, a communication device and a storage medium.

[0004] According to a first aspect of an embodiment of the present disclosure, a reference signal transmission method is provided, executed by a terminal, and the method comprises:

[0005] determining that the number of antenna groups of the terminal is at most 4, and determining that the maximum number of PTRS ports is N, N being a positive integer;

[0006] determining that a phase tracking reference signal (PTRS)-demodulation reference signal (DMRS) association indication field is not included in downlink control information (DCI), and that the transmission layer indication (TRI) indicated by the DCI is greater than 1;

[0007] determining an association relationship between M PTRS ports corresponding to a PTRS reference signal actually transmitted by the terminal and DMRS ports, M being a positive integer less than or equal to N;

[0008] transmitting a PTRS reference signal based on the DMRS ports respectively associated with the M PTRS ports.

[0009] In an implementation, N is determined to be 4, and M is determined to be 1, and the association relationship between the M PTRS ports and the DMRS ports comprises at least one of the following:

[0010] the number of code words transmitted by the terminal is 1, and the PTRS port is associated with a DMRS port having the smallest DMRS port index among all the DMRS ports;

[0011] the number of code words transmitted by the terminal is 1, and the PTRS port is associated with a DMRS port having the smallest DMRS port index in a DMRS port group sharing the PTRS port;

[0012] the number of code words transmitted by the terminal is 2, and the PTRS port is associated with a DMRS port having the smallest DMRS port index in a DMRS port group sharing the PTRS port, the DMRS port group corresponding to a code word having a higher modulation and coding strategy (MCS) level;

[0013] The number of code words transmitted by the terminal is 2, and the MCS levels of different code words are the same, and the PTRS port is associated with the DMRS port with the smallest DMRS port index in the DMRS port group corresponding to the first code word CW0;

[0014] The number of code words transmitted by the terminal is 1 or 2, and the PTRS port is associated with the DMRS port corresponding to any one DMRS index in the DMRS port group sharing the PTRS port.

[0015] In an implementation, N is determined to be 4, and M is greater than 1, and the association relationship between the M PTRS ports and the DMRS ports includes at least one of the following:

[0016] Each of the M PTRS ports is associated with the DMRS port with the smallest DMRS port index in the DMRS port group sharing the PTRS port;

[0017] The M PTRS ports are divided into T groups of PTRS ports in the order of PTRS port indexes, and different PTRS ports in the T groups of PTRS ports are associated with different DMRS ports in different DMRS port groups, wherein each DMRS port group shares the same PTRS port, and T is a positive integer less than or equal to M;

[0018] Each of the M PTRS ports is associated with the DMRS port corresponding to any one fixed DMRS port index in the DMRS port group sharing the PTRS port.

[0019] In an implementation, the M PTRS ports corresponding to the PTRS reference signal actually transmitted by the terminal are determined according to the transmission mode adopted by the terminal for uplink transmission, and the transmission mode adopted by the terminal for uplink transmission includes codebook-based physical uplink shared channel (PUSCH) transmission or non-codebook-based PUSCH transmission.

[0020] In an implementation, the transmission mode adopted by the terminal for uplink transmission includes codebook-based PUSCH transmission, and the method further includes:

[0021] Receiving precoding matrix indicator (TPMI) information;

[0022] Determining the M PTRS ports based on the antenna port group corresponding to the actual transmission layer indicated by the TPMI information.

[0023] In an implementation, the transmission mode adopted by the terminal for uplink transmission includes non-codebook-based PUSCH transmission, and the method further includes:

[0024] receiving sounding reference signal resource indication (SRI) information;

[0025] determining the M PTRS ports and a DMRS port group corresponding to the M PTRS ports based on PTRS port indexes corresponding to sounding reference signal (SRS) resources indicated by the SRI information.

[0026] In an embodiment, the method further includes:

[0027] sending capability information, the capability information being used to indicate that the terminal supports a maximum number of PTRS ports being N.

[0028] In an embodiment, the method further includes:

[0029] receiving configuration information, the configuration information being used to configure a maximum number of PTRS ports for a terminal.

[0030] In an embodiment, a PUSCH type corresponding to uplink transmission of the terminal includes at least one of:

[0031] scheduling-based PUSCH;

[0032] scheduling-free PUSCH type 1;

[0033] scheduling-free PUSCH type 2.

[0034] According to a second aspect of the embodiments of the present disclosure, a reference signal transmission method is provided, which is performed by a network device, and includes:

[0035] determining that a maximum number of PTRS ports is N, and determining that a number of PTRS ports corresponding to actual transmission of a PTRS reference signal by the terminal is M, N being a positive integer, and M being a positive integer less than or equal to N;

[0036] sending downlink control information (DCI), the DCI not including a phase tracking reference signal (PTRS)-demodulation reference signal (DMRS) association indication field and the DCI indicating that a transmission layer indication (TRI) is greater than 1;

[0037] determining an association relationship between the M PTRS ports and DMRS ports based on the DMRS ports corresponding to the M PTRS ports, respectively;

[0038] receiving a PTRS reference signal based on the DMRS ports associated with the M PTRS ports, respectively.

[0039] In an embodiment, N is determined to be 4, M is determined to be 1, and the association relationship between the M PTRS ports and DMRS ports includes at least one of:

[0040] The number of codewords transmitted by the terminal is determined to be 1, and the PTRS port is associated with a DMRS port with the smallest DMRS port index in all DMRS ports;

[0041] The number of codewords transmitted by the terminal is determined to be 1, and the PTRS port is associated with a DMRS port with the smallest DMRS port index in a DMRS port group sharing the PTRS port.

[0042] The number of codewords transmitted by the terminal is determined to be 2, and the PTRS port is associated with a DMRS port with the smallest DMRS port index in a DMRS port group corresponding to a codeword pair with a higher modulation and coding strategy (MCS) level.

[0043] The number of codewords transmitted by the terminal is determined to be 2, and the MCS levels of different codewords are the same, and the PTRS port is associated with a DMRS port with the smallest DMRS port index in a DMRS port group corresponding to a first codeword (CW0).

[0044] The number of codewords transmitted by the terminal is 1 or 2, and the PTRS port is associated with a DMRS port corresponding to any one of the DMRS indexes in a DMRS port group sharing the PTRS port.

[0045] In an implementation, it is determined that N is 4 and M is greater than 1, and the association relationship between the M PTRS ports and the DMRS ports includes at least one of the following:

[0046] Each of the M PTRS ports is associated with a DMRS port with the smallest DMRS port index in a DMRS port group sharing the PTRS port.

[0047] The M PTRS ports are divided into T groups of PTRS ports in the order of PTRS port indexes, different PTRS ports in the T groups of PTRS ports are associated with different DMRS ports in different DMRS port groups, each DMRS port group shares a same PTRS port, and T is a positive integer less than or equal to M.

[0048] Each of the M PTRS ports is associated with a DMRS port corresponding to any one of the fixed DMRS port indexes in a DMRS port group sharing the PTRS port.

[0049] In an implementation, the method further includes:

[0050] It is determined that a transmission mode used by the terminal for uplink transmission is codebook-based PUSCH transmission, and pre-coding matrix indication (TPMI) information is sent, the TPMI information being used to indicate the M PTRS ports.

[0051] In an implementation form of the method, the method further comprises:

[0052] determining that the transmission mode used by the terminal for the uplink transmission is a non-codebook-based PUSCH transmission, and transmitting sounding reference signal resource indication, SRI, information, the SRI information being used to indicate the M PTRS ports and DMRS port groups to which the M PTRS ports correspond respectively.

[0053] In an implementation form of the method, the method further comprises:

[0054] receiving capability information, the capability information being used to indicate that the terminal supports a maximum number of PTRS ports N.

[0055] In an implementation form of the method, the method further comprises:

[0056] transmitting configuration information, the configuration information being used to configure the maximum number of PTRS ports.

[0057] In an implementation form of the method, the PUSCH type corresponding to the uplink transmission of the terminal comprises at least one of:

[0058] a scheduled PUSCH;

[0059] a type 1 of the un-scheduled PUSCH;

[0060] a type 2 of the un-scheduled PUSCH.

[0061] According to a third aspect of embodiments of the present disclosure, a first reference signal transmission apparatus is provided, and the apparatus comprises:

[0062] a processing module configured to determine that the number of antenna groups of the terminal is maximum 4, and determine that the maximum number of PTRS ports is N, N being a positive integer;

[0063] the processing module is further configured to determine that a phase tracking reference signal, PTRS, -demodulation reference signal, DMRS, association indication field is not included in downlink control information, DCI, and a transmission layer indication, TRI, indicated by the DCI is greater than 1;

[0064] the processing module is further configured to determine an association relationship between M PTRS ports and DMRS ports corresponding to a PTRS reference signal actually transmitted by the terminal, M being a positive integer less than or equal to N;

[0065] a transmitting module configured to transmit the PTRS reference signal based on the DMRS ports to which the M PTRS ports are associated respectively.

[0066] In an embodiment, it is determined that N is 4 and M is 1, and the association between the M PTRS ports and the DMRS ports comprises at least one of the following:

[0067] when the number of codewords transmitted by the terminal is 1, the PTRS port is associated with a DMRS port having a smallest DMRS port index among all the DMRS ports;

[0068] when the number of codewords transmitted by the terminal is 1, the PTRS port is associated with a DMRS port having a smallest DMRS port index in a DMRS port group sharing the PTRS port;

[0069] when the number of codewords transmitted by the terminal is 2, the PTRS port is associated with a DMRS port having a smallest DMRS port index in a DMRS port group sharing the PTRS port corresponding to a modulation and coding strategy (MCS) level of a codeword pair having a higher MCS level;

[0070] when the number of codewords transmitted by the terminal is 2 and the MCS levels of different codewords are the same, the PTRS port is associated with a DMRS port having a smallest DMRS port index in a DMRS port group corresponding to a first codeword (CW0);

[0071] when the number of codewords transmitted by the terminal is 1 or 2, the PTRS port is associated with a DMRS port corresponding to any one of DMRS indexes in a DMRS port group sharing the PTRS port.

[0072] In an embodiment, it is determined that N is 4 and M is greater than 1, and the association between the M PTRS ports and the DMRS ports comprises at least one of the following:

[0073] each of the M PTRS ports is associated with a DMRS port having a smallest DMRS port index in a DMRS port group sharing the PTRS port;

[0074] the M PTRS ports are divided into T groups of PTRS ports in a PTRS port index order, different PTRS ports in the T groups of PTRS ports are associated with different DMRS ports in different DMRS port groups, each of the different DMRS port groups shares a same PTRS port, and T is a positive integer less than or equal to M;

[0075] each of the M PTRS ports is associated with a DMRS port corresponding to any one of fixed DMRS port indexes in a DMRS port group sharing the PTRS port.

[0076] In an embodiment, the M PTRS ports corresponding to which the terminal actually transmits PTRS reference signals are determined according to a transmission mode used by the terminal for uplink transmission, and the transmission mode used by the terminal for uplink transmission includes codebook-based physical uplink shared channel (PUSCH) transmission or non-codebook-based PUSCH transmission.

[0077] In an embodiment, the transmission mode used by the terminal for uplink transmission includes codebook-based PUSCH transmission.

[0078] The receiving module is further configured to receive pre-coding matrix indication (TPMI) information.

[0079] The processing module is further configured to determine the M PTRS ports based on antenna port groups corresponding to actual transmission layers indicated by the TPMI information.

[0080] In an embodiment, the transmission mode used by the terminal for uplink transmission includes non-codebook-based PUSCH transmission.

[0081] The receiving module is further configured to receive sounding reference signal (SRS) resource indication (SRI) information.

[0082] The processing module is further configured to determine the M PTRS ports and DMRS port groups corresponding to the M PTRS ports based on PTRS port indexes corresponding to SRS resources respectively indicated by the SRI information.

[0083] In an embodiment, the sending module is further configured to send capability information, and the capability information is used to indicate that the terminal supports a maximum number of PTRS ports N.

[0084] In an embodiment, the receiving module is further configured to receive configuration information, and the configuration information is used to configure a maximum number of PTRS ports for the terminal.

[0085] In an embodiment, the PUSCH type corresponding to the uplink transmission of the terminal includes at least one of the following:

[0086] scheduling-based PUSCH;

[0087] grant-free PUSCH type 1;

[0088] grant-free PUSCH type 2.

[0089] According to a fourth aspect of the embodiments of the present disclosure, a second reference signal transmission apparatus is provided, and the apparatus includes:

[0090] The processing module is configured to determine that a maximum number of PTRS ports is N, determine that a number of PTRS ports corresponding to actual transmission of a PTRS reference signal by the terminal is M, N is a positive integer, and M is a positive integer less than or equal to N;

[0091] The sending module is configured to send downlink control information (DCI), the DCI does not include a phase tracking reference signal (PTRS)-demodulation reference signal (DMRS) association indication field, and a transmission layer indication (TRI) indicated by the DCI is greater than 1.

[0092] The processing module is further configured to determine an association between the M PTRS ports and DMRS ports based on the M PTRS ports corresponding to the DMRS ports, respectively.

[0093] The receiving module is configured to receive a PTRS reference signal based on the M PTRS ports being associated with the DMRS ports, respectively.

[0094] In an implementation, it is determined that N is 4 and M is 1, and the association between the M PTRS ports and DMRS ports includes at least one of the following:

[0095] It is determined that a number of codewords transmitted by the terminal is 1, and the PTRS port is associated with a DMRS port having a smallest DMRS port index among all DMRS ports.

[0096] It is determined that a number of codewords transmitted by the terminal is 1, and the PTRS port is associated with a DMRS port having a smallest DMRS port index in a DMRS port group sharing the PTRS port.

[0097] It is determined that a number of codewords transmitted by the terminal is 2, and the PTRS port is associated with a DMRS port having a smallest DMRS port index in a DMRS port group corresponding to a codeword pair having a higher modulation and coding strategy (MCS) level.

[0098] It is determined that a number of codewords transmitted by the terminal is 2, and MCS levels of different codewords are the same, and the PTRS port is associated with a DMRS port having a smallest DMRS port index in a DMRS port group corresponding to a first codeword (CW0).

[0099] A number of codewords transmitted by the terminal is 1 or 2, and the PTRS port is associated with a DMRS port corresponding to any one of DMRS indexes in a DMRS port group sharing the PTRS port.

[0100] In an implementation, it is determined that N is 4 and M is greater than 1, and the association between the M PTRS ports and DMRS ports includes at least one of the following:

[0101] each of the M PTRS ports is associated with a DMRS port corresponding to a fixed DMRS port index in any one of the DMRS port groups sharing the PTRS port;

[0102] the M PTRS ports are divided into T groups of PTRS ports in the order of PTRS port indexes, different PTRS ports in the T groups of PTRS ports are associated with different DMRS ports in different DMRS port groups, and each of the different DMRS port groups shares one same PTRS port, T being a positive integer less than or equal to M;

[0103] each of the M PTRS ports is associated with a DMRS port corresponding to a fixed DMRS port index in any one of the DMRS port groups sharing the PTRS port.

[0104] In an implementation form, the processing module is further configured to determine that the transmission mode adopted by the terminal for the uplink transmission is codebook-based PUSCH transmission.

[0105] The sending module is further configured to send pre-coding matrix indication, TPMI, information, the TPMI information being used to indicate the M PTRS ports.

[0106] In an implementation form, the processing module is further configured to determine that the transmission mode adopted by the terminal for the uplink transmission is non-codebook-based PUSCH transmission.

[0107] The sending module is further configured to send sounding reference signal resource, SRI, information, the SRI information being used to indicate the M PTRS ports and the DMRS port groups corresponding to the M PTRS ports respectively.

[0108] In an implementation form, the receiving module is further configured to receive capability information, the capability information being used to indicate that the terminal supports a maximum number of PTRS ports being N.

[0109] In an implementation form, the sending module is further configured to send configuration information, the configuration information being used to configure the maximum number of PTRS ports.

[0110] In an implementation form, the PUSCH type corresponding to the uplink transmission of the terminal comprises at least one of the following:

[0111] scheduling-based PUSCH;

[0112] grant-free PUSCH type 1;

[0113] grant-free PUSCH type 2.

[0114] According to a fifth aspect of the embodiments of the present disclosure, a first communication device is provided, comprising: a processor; a memory for storing processor-executable instructions; and wherein the processor is configured to perform the method according to the first aspect or any of the embodiments of the first aspect.

[0115] According to a sixth aspect of the embodiments of the present disclosure, a second communication device is provided, comprising: a processor; a memory for storing processor-executable instructions; and wherein the processor is configured to perform the method according to the second aspect or any of the embodiments of the second aspect.

[0116] According to a seventh aspect of the embodiments of the present disclosure, a storage medium is provided, wherein the storage medium stores instructions, and when the instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to perform the method according to the first aspect or any of the embodiments of the first aspect; or when the instructions in the storage medium are executed by a processor of a network device, the storage medium is enabled to perform the method according to the second aspect or any of the embodiments of the second aspect.

[0117] According to an eighth aspect of the embodiments of the present disclosure, a communication system is provided, comprising a terminal and a network device, wherein the terminal is configured to perform the method according to the first aspect or any of the embodiments of the first aspect; and the network device is configured to perform the method according to the second aspect or any of the embodiments of the second aspect.

[0118] The technical solution provided by the embodiments of the present disclosure can have the following beneficial effects: the terminal determines that the number of antenna groups of the terminal is at most 4, determines that the maximum number of PTRS ports is N, determines that the PTRS-DMRS association indication field is not included in the DCI and the transmission layer indicated by the DCI is greater than 1, and determines the association relationship between the M PTRS ports corresponding to the actually transmitted PTRS reference signal of the terminal and the DMRS ports, wherein M is a positive integer less than or equal to N; and the terminal transmits the PTRS reference signal based on the DMRS ports respectively associated with the M PTRS ports. Thus, the terminal can determine the association relationship between the M PTRS ports corresponding to the actually transmitted PTRS reference signal of the terminal and the DMRS ports even when the PTRS-DMRS association indication field is not included in the DCI, thereby improving the estimation accuracy of the phase noise source under multiple antenna panels.

[0119] It should be understood that the general description above and the detailed description below are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0120] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0121] Figure 1 FIG. 1 is a schematic diagram of a wireless communication system according to an example embodiment.

[0122] Figure 2A 2B FIGs. 2C and 2D are schematic diagrams of a structure of a DMRS according to an example embodiment.

[0123] Figure 3 FIG. 3 is a flowchart of a reference signal transmission method according to an example embodiment.

[0124] Figure 4 FIG. 4 is a flowchart of a reference signal transmission method according to an example embodiment.

[0125] Figure 5 FIG. 5 is a flowchart of a PTRS port determination method according to an example embodiment.

[0126] Figure 6 FIG. 6 is a flowchart of a PTRS port determination method according to an example embodiment.

[0127] Figure 7 FIG. 7 is a flowchart of a reference signal transmission method according to an example embodiment.

[0128] Figure 8 FIG. 8 is a flowchart of a reference signal transmission method according to an example embodiment.

[0129] Figure 9 FIG. 9 is a flowchart of a PTRS port determination method according to an example embodiment.

[0130] Figure 10 FIG. 10 is a flowchart of a PTRS port determination method according to an example embodiment.

[0131] Figure 11 FIG. 11 is a schematic diagram of a first reference signal transmission apparatus according to an example embodiment.

[0132] Figure 12 FIG. 12 is a schematic diagram of a second reference signal transmission apparatus according to an example embodiment.

[0133] Figure 13 FIG. 13 is a schematic diagram of a first communication device according to an example embodiment.

[0134] Figure 14 FIG. 14 is a schematic diagram of a second communication device according to an example embodiment. DETAILED DESCRIPTION ​

[0135] Exemplary embodiments will be described in detail below with reference to the drawings. The following description is directed in the alternative to the accompanying drawings that show, by way of illustration, the disclosed devices. In the description below, like reference numerals are used to describe the same or similar components throughout the several views of the drawings, and any repetition of the reference numerals in different drawings is intended to identify the same or similar components. The implementation described in the following exemplary embodiments is not meant to represent all implementations consistent with the present disclosure.

[0136] The reference signal transmission method provided by the embodiments of the present disclosure can be applied to Figure 1 The wireless communication system shown. Referring to Figure 1 The wireless communication system includes network devices and terminals. Among them, the terminal is connected with the network device, and can perform data transmission. In addition, the terminals can also be connected with each other, and the network devices can also be connected with each other.

[0137] It can be understood that, Figure 1 The wireless communication system shown is only illustrative, and the embodiments or examples of the present disclosure can include all or part of the subjects in Figure 1 , or include other subjects in Figure 1 , and the number of each subject is arbitrary and not limited to Figure 1 . Figure 1 The connection relationship shown is only illustrative, and any subject can not be connected or can be connected, and the connection can be in any way, can be direct or indirect connection, can be wired connection, or wireless connection.

[0138] It can be further understood that the wireless communication system of the embodiments of the present disclosure is a network that provides wireless communication functions. The wireless communication system can use different communication technologies, such as code division multiple access (CDMA), wideband code division multiple access (WCDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), carrier sense multiple access with collision avoidance (CSMA / CA), and the like. Depending on the capacity, speed, latency, and the like of different networks, the network can be divided into 2G, 3G, 4G, or future evolution networks, such as 5G networks. The 5G network can also be referred to as a new radio (NR) network. For the convenience of description, the wireless communication network in the present disclosure can be referred to as a network.

[0139] Further, the network device involved in the present disclosure can also be referred to as a wireless access network device. The wireless access network device can be a base station, an evolved node B (eNB), a home base station, an access point (AP) in a wireless fidelity (WiFi) system, a wireless relay node, a wireless backhaul node, a transmission point (TP), a transmission and reception point (TRP), and the like. It can also be a gNB in an NR system, or it can be a component or part of a device constituting a base station, and the like. It should be understood that the specific technology and specific device form of the network device are not limited in the embodiments of the present disclosure. In the present disclosure, the network device can provide communication coverage for a specific geographic area, and can communicate with terminals located in the coverage area (cell). In addition, when it is a vehicle-to-everything (V2X) communication system, the network device can also be a vehicle-mounted device.

[0140] Further, the terminal involved in the present disclosure, which can also be referred to as a terminal device, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), etc., is a device that provides voice and / or data connectivity to a user, such as a handheld device having wireless connection capability, a vehicle-mounted device, etc. Currently, some examples of the terminal are: a mobile phone, a client front-end device, a pocket personal computer (PPC), a palm computer, a personal digital assistant (PDA), a notebook computer, a tablet computer, a wearable device, or a vehicle-mounted device, etc. In addition, when it is a vehicle-to-everything (V2X) communication system, the terminal device can also be a vehicle-mounted device. It should be understood that the present disclosure does not limit the specific technology and specific device form of the terminal.

[0141] In order to improve the coverage of the cell edge and provide more balanced service quality in the service area, data is transmitted in different ways among multiple TRPs / panels in cooperation. From the perspective of network form, network deployment in the manner of a large number of distributed access points plus baseband centralized processing will be more conducive to providing balanced user experience rate, and significantly reducing the delay and signaling overhead caused by handover. By utilizing the cooperation among multiple TRPs or panels and the transmission / reception of channels from multiple beams at multiple angles, various shadowing / blocking effects can be better overcome, the robustness of link connection can be guaranteed, and the transmission quality of ultra reliable low latency communication (URLLC) service can be improved and the reliability requirement can be met.

[0142] In an embodiment, based on the application of the downlink multi-TRP / panel multi-point cooperation transmission technology, the physical downlink shared channel (PDSCH) is enhanced for transmission. Since data transmission includes scheduling feedback of uplink and downlink channels, in the research of URLLC service, only enhancing the downlink data channel cannot guarantee the overall service performance. Therefore, in the research of R17, the downlink control channel (PDCCH) and the physical uplink control channel (PUCCH) and the physical uplink shared channel (PUSCH) are further enhanced.

[0143] Among them, for PDSCH / PUSCH channels, the data layer of data transmission corresponds to the demodulation reference signal (DMRS) port used for demodulation. The design of data channel (PDSCH / PUSCH) DMRS in the NR system mainly includes the following two types:

[0144] Front-load DMRS: In each scheduling time unit, the position of the first occurrence of DMRS should be as close to the starting point of scheduling as possible. The use of front-load DMRS helps the receiving end to quickly estimate the channel and perform reception detection, which plays an important role in reducing latency and supporting self-contained structure. Depending on the total number of orthogonal DMRS ports, front-load DMRS can occupy up to two consecutive orthogonal frequency division multiplexing (OFDM) symbols.

[0145] Additional DMRS: For low mobility scenarios, front-load DMRS can obtain channel estimation performance that meets demodulation requirements with lower overhead. However, the NR system considers a maximum mobile speed of 500 km / h, which faces such a large range of mobility that in addition to front-load DMRS, more DMRS symbols need to be inserted within the scheduling duration in medium / high speed scenarios to meet the estimation accuracy of channel time variation. To solve this problem, the NR system adopts a DMRS structure that combines front-load DMRS and additional DMRS with configurable time-domain density. The pattern of each group of additional DMRS is a repetition of the front-load DMRS.

[0146] In each scheduling time unit, if there is additional DMRS, the pattern of each group of additional DMRS is consistent with the front-load DMRS. Therefore, the pattern design of front-load DMRS is the basis of DMRS design. The design idea of front-load DMRS is divided into two categories, of which the first category (type 1) adopts a COMB+Orthogonal Cover Code (OCC) structure, and the second category (type 2) is based on a Frequency Division Multiplexing (FDM)+OCC structure.

[0147] Figures 2A-2D The figure design diagram of front-load DMRS of two configuration types is shown. Among them, Figure 2A 、 Figure 2B The DMRS pattern mapping diagram of 1 OFDM symbol and 2 OFDM symbols corresponding to configuration type 1 is shown. Figure 2C 、 Figure 2D The DMRS pattern mapping diagram of 1 OFDM symbol and 2 OFDM symbols corresponding to configuration type 2 is shown.

[0148] Among them, the number of DMRS ports depends on the number of orthogonal ports used for transmission, and the front-load DMRS can be configured for a maximum of two OFDM symbols. Considering the power utilization efficiency, when using two symbols of front-load DMRS, time-division (TD)-OCC is used in the time domain on the basis of frequency domain circuit switching (CS) or OCC. Two types of front-load DMRS patterns are shown in FIG. 2.

[0149] In the medium / high speed scene, in addition to the front-load DMRS, more DMRS symbols need to be inserted within the scheduling duration to meet the estimation accuracy of channel time variation. The DMRS structure of front-load DMRS combined with additional DMRS with time domain density configurable is adopted in the NR system. The pattern of each group of additional DMRS is a repetition of the front-load DMRS. Therefore, consistent with the front-load DMRS, each group of additional DMRS can also occupy a maximum of two consecutive DMRS symbols. According to the specific use scene, a maximum of three groups of additional DMRS can be configured in each scheduling. The number of additional DMRS depends on the high-level parameter configuration and the specific scheduling duration.

[0150] In a wireless communication system, phase noise (PN) is caused by the implementation of the local oscillator, which destroys the orthogonality of each subcarrier in an orthogonal frequency division multiplexing (OFDM) system, which causes common phase error (CPE) to cause rotation of the modulation constellation at a fixed angle and causes inter-carrier interference (ICI) to cause scattering of constellation points, which is more obvious at high frequencies. Since the influence of CPE is greater, compensation for CPE is mainly considered in NR.

[0151] For high-frequency transmission, the sending end needs to send a reference signal known to the receiving end, such as a PTRS reference signal, and the receiving end can estimate the phase noise accordingly and then perform corresponding phase compensation. The PTRS port for sending the PTRS reference signal is associated with the DMRS antenna port. In order to improve the accuracy of phase noise estimation, the sending end needs to map the PTRS port to the corresponding quasi-co-located DMRS port with the best channel condition, and the receiving end needs to know the specific DMRS port corresponding to the PTRS, otherwise it cannot estimate the phase noise using the PTRS.

[0152] The number of PTRS ports is related to the number of phase noise sources. When there are multiple independent phase noise sources, each phase noise source needs a PTRS port to estimate the phase noise.

[0153] In an embodiment of the present disclosure, one PT-RS port is supported for downlink and two PT-RS ports are supported for uplink.

[0154] In an embodiment of the present disclosure, whether to transmit PTRS in uplink is controlled by configuration of a high-layer parameter. If the high-layer parameter does not configure a phase tracking reference signal (phaseTrackingRS) in DMRS uplink configuration (DMRS-UplinkConfig) for the terminal, the terminal does not transmit PTRS in uplink transmission.

[0155] In another embodiment of the present disclosure, if the high-layer parameter configures phaseTrackingRS in DMRS-UplinkConfig, the terminal transmits PTRS in uplink transmission. The maximum number of PTRS ports is 1 or 2, which is determined according to the maximum number of PTRS ports (maxNrofPorts) configured in the high-layer parameter PTRS-UplinkConfig.

[0156] In an embodiment of the present disclosure, if the maximum number of PTRS ports configured by a high layer parameter is 1, one DMRS port is indicated to be associated with the PTRS port by a PTRS-DMRS association indication field in a single downlink control information (DCI) 0_1 / 0_2. As shown in Table 1, the PTRS-DMRS association indication field, for example, a bit value of 0 indicates that the PTRS port is associated with the first scheduled DMRS port.

[0157] Table 1

[0158] Bit values DMRS port 0 First scheduled DMRS port 1 Second scheduled DMRS port 2 Third scheduled DMRS port 3 Fourth scheduled DMRS port

[0159] In an embodiment of the present disclosure, if the maximum number of PTRS ports configured by a high layer parameter is 2, the network device divides the DMRS ports corresponding to the SRS resources indicated by the SRI into two groups and establishes an association relationship for each group. As shown in Table 2, the high 1-bit is used to indicate one of the two DMRS ports associated with the shared PTRS port 0 of the PTRS reference signal, and the low 1-bit is used to indicate one of the two DMRS ports associated with the shared PTRS port 1 of the PTRS reference signal.

[0160] Table 2

[0161]

[0162] In an embodiment of the present disclosure, the uplink transmission mode includes two transmission modes of codebook-based transmission and non-codebook-based transmission, and the PTRS port indications corresponding to different transmission modes are different.

[0163] The codebook-based transmission includes codebook-based full-coherent transmission, codebook-based partial-coherent transmission, and codebook-based non-coherent transmission.

[0164] The PTRS port indications corresponding to different transmission modes are described as follows.

[0165] I. For codebook-based full-coherent transmission, two PTRS ports can be configured in uplink. If SRI selects one SRS resource, it means all layers are transmitted from the same analog beam, so only one PTRS port is enough. If terminal is scheduled with multiple layers, a field is needed to indicate the association between PTRS and DMRS ports (e.g. the field can be carried in DCI_0_1), the size of the field depends on the number of transmission antennas and Transmission Rank Indication (TRI). The DMRS port index and the associated PTRS port index are shown in Table 3.

[0166] Table 3

[0167]

[0168] II. For codebook-based partial-coherent transmission and non-coherent transmission,

[0169] If SRI selects one SRS resource or RRC configures one SRS resource, the different SRS ports in the resource are from panels with different crystal oscillators, then two PTRS ports are needed. When SRI selects only one SRS resource, if the maximum number of indicated PTRS ports is 1, then one PTRS port is transmitted and corresponds to one SRS resource, as shown in Table 2 above. If the maximum number of indicated PTRS ports is 2, the number of PTRS ports corresponding to the actual transmitted PTRS reference signal and the number of layers associated with it are determined by TPMI and / or TRI indication, as shown in Table 3 above. The SRS resource ports are divided into two groups. The maximum number of PTRS ports is configured as 'n2' in the high-level parameter PTRS-UplinkConfig. For example, SRS port 0 and 2 share PTRS port 0 in the indicated TPMI, and SRS port 1 and 3 share PTRS port 1 in the indicated TPMI. If the number of layers indicated by TPMI from one SRS port group is 1 or 2, only one PTRS port needs to be scheduled, otherwise 2 PTRS ports need to be scheduled.

[0170] III. For non-codebook-based transmission

[0171] Up to 4 SRS ports can be indicated by SRI in DCI field, and one SRI indicates one SRS resource (each SRS resource has one SRS port). One PTRS port index can be configured in each SRS resource. When multiple beam transmission is indicated by SRI, 2 PTRS ports are also needed. However, if some SRS resources configured contain the same PTRS port index, these resources share one PT-RS port, and the corresponding DMRS are also associated with the same PTRS port. Therefore, the number of PTRS ports actually used for transmission is determined according to SRI.

[0172] In an example embodiment, Table 4 shows a TPMI table for indicating transmission precoding matrix indicator (TPMI) and rank indicator (RI) in codebook-based transmission.

[0173] Table 4

[0174]

[0175] In the above Table 6, Bit field mapped to index indicates the bit field mapped to the index, codebookSubset indicates the codebook subset, and the transmission capability of the codebook subset includes: full and partial and non-coherent (full and partial and non-coherent) transmission, partial and non-coherent (partial and non-coherent) transmission, and non-coherent (non-coherent) transmission. Taking the above Table 6 as an example, Table 4 shows the precoding information and the number of layers in the codebook subset corresponding to the maximum rank number Rank of 2 or 3 or 4 with 4 antenna ports.

[0176] In an example embodiment, Table 5 shows a table of the number of SRS resources in the SRS resource set indicated by SRI in non-codebook-based transmission.

[0177] Table 5

[0178]

[0179] In the above Table 6, Bit field mapped to index indicates the bit field mapped to the index, codebookSubset indicates the codebook subset, and the transmission capability of the codebook subset includes: full and partial and non-coherent (full and partial and non-coherent) transmission, partial and non-coherent (partial and non-coherent) transmission, and non-coherent (non-coherent) transmission. Taking the above Table 6 as an example, Table 4 shows the precoding information and the number of layers in the codebook subset corresponding to the maximum rank number Rank of 2 or 3 or 4 with 4 antenna ports. SRS In the above Table 6, Bit field mapped to index indicates the bit field mapped to the index, codebookSubset indicates the codebook subset, and the transmission capability of the codebook subset includes: full and partial and non-coherent (full and partial and non-coherent) transmission, partial and non-coherent (partial and non-coherent) transmission, and non-coherent (non-coherent) transmission. Taking the above Table 6 as an example, Table 4 shows the precoding information and the number of layers in the codebook subset corresponding to the maximum rank number Rank of 2 or 3 or 4 with 4 antenna ports.

[0180] In an embodiment of the present disclosure, when the uplink terminal is extended to a maximum of 8Tx transmission, the maximum number of supported data layers can be 8 layers, and the antenna structure of the terminal can also have different antenna port grouping conditions, so the existing PTRS and DMRS port association relationship also needs to be enhanced to support the estimation of PTRS for CPE in different scenarios. The maximum number of PTRS ports is currently 2, but if the antenna port grouping is greater than 2, the current PTRS design will be limited and cannot estimate more phase noise sources. Therefore, PTRS enhancement after the uplink terminal is extended to a maximum of 8Tx transmission and the association relationship between PTRS and DMRS during PUSCH transmission can be considered.

[0181] Figure 3 is a flowchart of a reference signal transmission method according to an exemplary embodiment, as shown in Figure 3 The reference signal transmission method is performed by a terminal and includes the following steps.

[0182] In step S11, it is determined that the number of antenna groups of the terminal is a maximum of 4, and the maximum number of PTRS ports is N.

[0183] In some embodiments, the number of antennas of the terminal is an inherent attribute of the terminal, and the terminal or the network device can determine the antenna grouping information based on the number of antennas of the terminal, and the terminal determines the number of antenna groups based on the antenna grouping information.

[0184] Optionally, the antenna grouping information can be fixedly stored in the terminal and the network device; or the network device sends signaling to the terminal, and informs the terminal of the antenna grouping information based on the signaling.

[0185] For example, the antenna grouping information is fixedly stored in the terminal and the network device, which can be understood as that the terminal and the network device have previously negotiated the antenna grouping, and the antenna grouping information is saved, and the network device also knows the antenna grouping information, so the terminal directly reads the antenna grouping information stored locally, and groups the antennas according to the antenna grouping information.

[0186] In some embodiments, when the number of antenna groups is 1, each antenna is fully coherent; when the number of antenna groups is 2, each antenna group is non-coherent, and each antenna in the antenna group is fully coherent, partially coherent, or non-coherent. When the number of antenna groups is 4, each antenna group is non-coherent, and each antenna in each antenna group is fully coherent, partially coherent, or non-coherent.

[0187] In some embodiments, the maximum number of PTRS ports N is a positive integer, and the terminal determines the maximum number of PTRS ports based on at least one of the following: its own capability, network device configuration, and protocol specification.

[0188] For example, the terminal determines the maximum number of PTRS ports supported by itself. For another example, the terminal determines the maximum number of PTRS ports based on the configuration of the network device. For yet another example, the terminal determines the maximum number of PTRS ports based on a protocol specification.

[0189] In a possible implementation, the terminal determines the maximum number of PTRS ports supported by itself, and reports the maximum number of PTRS ports supported by the terminal to the network device through capability information.

[0190] In a possible implementation, the terminal receives configuration information sent by the network device, and determines the maximum number of PTRS ports based on the configuration information.

[0191] In a possible implementation, the terminal sends capability information, the capability information being used to indicate the maximum number of PTRS ports supported by the terminal; the network device configures the maximum number of PTRS ports for the terminal based on the capability information, and sends configuration information, the terminal determining the maximum number of PTRS ports based on the configuration information.

[0192] It is worth noting that the maximum number of PTRS ports supported by the terminal and the maximum number of PTRS ports configured by the network device can be the same or different.

[0193] In step S12, it is determined that the PTRS-DMRS association indication field is not included in the DCI and the TRI indicated by the DCI is greater than 1.

[0194] In some embodiments, whether the PTRS-DMRS association indication field is included in the DCI is determined based on first signaling configuration. For example, the first signaling can be RRC signaling. For another example, the first signaling is mainly used to configure whether the PTRS-DMRS association indication field is included in the DCI, for example, can be RRC signaling, but can also be other signaling, and the embodiments of the present disclosure do not limit here.

[0195] In some embodiments, the TRI is carried in the DCI. In other embodiments, the TRI is used to indicate the number of transmission layers, and the TRI can also be carried in other signaling.

[0196] A special case is that the TRI is 1, and there is no need to determine the association relationship between the PTRS port and the DMRS port, and the PTRS port corresponding to the PTRS reference signal sent by the terminal is by default associated with the DMRS port.

[0197] In step S13, the association relationship between the M PTRS ports corresponding to the PTRS reference signal actually sent by the terminal and the DMRS port is determined.

[0198] Wherein, the terminal determines the maximum number of PTRS ports as M, the terminal actually transmits the number of M PTRS ports corresponding to the PTRS reference signal is less than or equal to N, and M is a positive integer.

[0199] In some embodiments, the M PTRS ports corresponding to the PTRS reference signal actually transmitted by the terminal are determined according to the transmission mode adopted by the terminal for uplink transmission. In an implementation, the transmission mode adopted by the terminal for uplink transmission includes codebook-based PUSCH transmission or non-codebook-based PUSCH transmission.

[0200] In some embodiments, the transmission mode adopted by the terminal for uplink transmission is codebook-based PUSCH transmission, and the terminal can determine the M PTRS ports based on TPMI information. For example, the M PTRS ports are determined based on the antenna port group corresponding to the actual transmission layer indicated by the TPMI information. For details, see the implementation shown in Figure 5 The embodiments of the present disclosure will not be described in detail here.

[0201] In some embodiments, the transmission mode adopted by the terminal for uplink transmission is non-codebook-based PUSCH transmission, and the terminal can determine the M PTRS ports based on SRI information. For example, the M PTRS ports are determined based on the PTRS port index corresponding to the SRS resource indicated by the SRI information. For details, see the implementation shown in Figure 6 The embodiments of the present disclosure will not be described in detail here.

[0202] In some embodiments, the PUSCH type corresponding to the uplink transmission of the terminal includes at least one of the following: scheduled PUSCH; unscheduled PUSCH type 1; and unscheduled PUSCH type 2.

[0203] In some embodiments, the terminal determines the association relationship between the M PTRS ports and the DMRS ports based on a default rule.

[0204] In some embodiments, the terminal actually transmits a single PTRS port corresponding to the PTRS reference signal, that is, M is 1. The association relationship between the single PTRS port and the DMRS port can be determined based on the number of code words (CW) transmitted by the terminal.

[0205] In an implementation, the terminal in the embodiments of the present disclosure has 8 antennas, supports uplink transmission of a maximum of 8 layers, and supports a maximum of 2 code words. In an implementation, the terminal transmits one code word CW0 corresponding to 1-4 layers, and transmits two code words CW0 and CW1 corresponding to 5-8 layers.

[0206] For example, when the number of codepoints transmitted by the terminal is 1 according to the default rule, the single PTRS port is associated with the DMRS port with the smallest DMRS port index among all the DMRS ports. For another example, when the number of codepoints transmitted by the terminal is 2 according to the default rule, the association between the single PTRS port and the DMRS ports can be further determined based on the Modulation and Coding Style (MCS) level of the codepoints. For example, when the number of codepoints transmitted by the terminal is 2 according to the default rule, the single PTRS port is associated with the DMRS port with the smallest DMRS port index in the DMRS port group sharing the PTRS port corresponding to the codepoint with the higher MCS level. Of course, the association between the single PTRS port and the DMRS ports is not limited to the above example, and the association between the single PTRS port and the DMRS ports can be seen from the following examples, which will not be described in detail herein.

[0207] Optionally, the number of codepoints transmitted by the terminal represents the number of codepoints corresponding to the PUSCH transmission of the terminal. Of course, in some embodiments, the number of codepoints transmitted by the terminal can also represent the number of codepoints corresponding to other channel transmissions of the terminal. Here, the number of codepoints transmitted by the terminal is uniformly described, which will not be described in detail below.

[0208] In some embodiments, the terminal actually transmits a plurality of PTRS reference signals corresponding to a plurality of PTRS ports, i.e., M is greater than 1. The association between the M PTRS ports and the DMRS ports is determined based on a default rule. For example, the default rule can be that each of the M PTRS ports is associated with the DMRS port with the smallest DMRS port index in the DMRS port group sharing the PTRS port. For another example, the default rule can be that each of the M PTRS ports is associated with the DMRS port corresponding to any fixed DMRS port index in the DMRS port group sharing the PTRS port. Of course, the association between the M PTRS ports and the DMRS ports is not limited to the above example, and the association between the M PTRS ports and the DMRS ports can be seen from the following examples, which will not be described in detail herein.

[0209] In the embodiment of the present disclosure, it is determined that the maximum number of antenna groups of the terminal is 4, the maximum number of PTRS ports is N, the PTRS-DMRS association indication field is not included in the DCI, the TRI indicated by the DCI is greater than 1, and the association relationship between the M PTRS ports corresponding to the actually transmitted PTRS reference signal of the terminal and the DMRS ports is determined, so that the terminal can determine the association relationship between the M PTRS ports corresponding to the actually transmitted PTRS reference signal of the terminal and the DMRS ports even when the PTRS-DMRS association indication field is not included in the DCI, thereby improving the estimation accuracy of the phase noise source under the multi-antenna panel.

[0210] In the embodiment of the present disclosure, there is no strict execution sequence between step S11 and step S12. In some embodiments, step S11 can be executed first and then step S12 can be executed. In other embodiments, step S12 can be executed first and then step S11 can be executed. The execution sequence of step S11 and step S12 is only illustrative and is not limited.

[0211] The embodiment of the present disclosure also provides a flowchart of a reference signal transmission method, as shown in Figure 4 , including the following steps.

[0212] In step S11, it is determined that the maximum number of antenna groups of the terminal is 4 and the maximum number of PTRS ports is N.

[0213] In step S12, it is determined that the PTRS-DMRS association indication field is not included in the DCI and the TRI indicated by the DCI is greater than 1.

[0214] In step S13, the association relationship between the M PTRS ports corresponding to the actually transmitted PTRS reference signal of the terminal and the DMRS ports is determined.

[0215] The specific implementation of step S11, step S12, and step S13 can be referred to the specific implementation of step S11, step S12, and step S13 in Figure 3 . The embodiment of the present disclosure will not be described here.

[0216] In step S14, the PTRS reference signal is transmitted based on the DMRS ports respectively associated with the M PTRS ports.

[0217] Optionally, the terminal transmits the PTRS reference signal based on the DMRS ports respectively associated with the M PTRS ports. It can also be understood that the terminal transmits the PTRS reference signal on the DMRS ports respectively associated with the M PTRS ports.

[0218] In the embodiment of the present disclosure, the terminal transmits the PTRS reference signal based on the DMRS ports respectively associated with the M PTRS ports, thereby improving the estimation accuracy of the phase noise source under the multi-antenna panel.

[0219] In the embodiment of the present disclosure, there is no strict execution sequence between the step S11 and the step S12. In some embodiments, the step S11 can be executed first and then the step S12 can be executed. In other embodiments, the step S12 can be executed first and then the step S11 can be executed. The embodiment of the present disclosure is only illustrative, and the execution sequence of the step S11 and the step S12 is not limited.

[0220] The association relationship between the M PTRS ports and the DMRS ports will be described in detail below.

[0221] In the reference signal transmission method provided in the embodiment of the present disclosure, it is determined that the terminal actually transmits the PTRS reference signal corresponding to a single PTRS port, that is, M is 1, and the association relationship between the PTRS port and the DMRS port can be determined based on the number of code words transmitted by the terminal.

[0222] In some embodiments, the association relationship between the PTRS port and the DMRS port includes at least one of the following:

[0223] (1) The number of code words transmitted by the terminal is 1, and the PTRS port is associated with the DMRS port with the smallest DMRS port index in all DMRS ports;

[0224] (2) The number of code words transmitted by the terminal is 1, and the PTRS port is associated with the DMRS port with the smallest DMRS port index in the DMRS port group sharing the PTRS port;

[0225] (3) The number of code words transmitted by the terminal is 2, and the PTRS port is associated with the DMRS port with the smallest DMRS port index in the DMRS port group sharing the PTRS port corresponding to the code word pair with a higher modulation and coding strategy (MCS) level;

[0226] (4) The number of code words transmitted by the terminal is 2, and the MCS levels of different code words are the same, and the PTRS port is associated with the DMRS port with the smallest DMRS port index in the DMRS port group corresponding to the first code word CW0;

[0227] (5) The number of code words transmitted by the terminal is 1 or 2, and the PTRS port is associated with the DMRS port corresponding to any one DMRS index in the DMRS port group sharing the PTRS port.

[0228] In an embodiment, for the above association (1), the antenna group is 1, and the transmission between each antenna is full-coherent. For example, the PTRS port is associated with the DMRS port with index "0" of the DMRS port.

[0229] In an embodiment, for the above association (2), the antenna group is 2 or 4, and the transmission between each antenna is partial-coherent. For example, when the antenna group is 2, each group includes 4 PTRS ports, and the PTRS port is associated with the DMRS port with index "0" of the DMRS port in the DMRS port group sharing the PTRS port.

[0230] In some embodiments, the association between the PTRS port and the DMRS port can further include at least one of the following:

[0231] (6) The number of codewords transmitted by the terminal is 1, and the PTRS port is associated with the DMRS port with the largest index among all the DMRS ports;

[0232] (7) The number of codewords transmitted by the terminal is 1, and the PTRS port is associated with the DMRS port with the largest index in the DMRS port group sharing the PTRS port;

[0233] (8) The number of codewords transmitted by the terminal is 2, and the PTRS port is associated with the DMRS port with the largest index in the DMRS port group corresponding to the codeword pair with a higher MCS level, which shares the PTRS port.

[0234] In some embodiments, the association between the PTRS port and the DMRS port can further include that the PTRS port is cyclic, that is, the PTRS port corresponding to each transmission of the PTRS reference signal corresponds to different DMRS ports based on the order of the DMRS port index.

[0235] Of course, the association between the PTRS port and the DMRS port can not only include the above exemplary association, but also include other predefined associations, which are not limited in the embodiments of the present disclosure.

[0236] Further, in the above exemplary association, the association between the PTRS port and the DMRS port can include different combinations. For example, the combination of (1) and (3), the combination of (1) and (4), the combination of (1), (4), and (5), and the like. The specific association or combination of the association is determined based on the actual situation, which is not limited in the embodiments of the present disclosure.

[0237] In addition, the association between the PTRS port and the DMRS port involved in the embodiments of the present disclosure can be associated with Figure 3The steps S11 and S12 in the method can be implemented in combination, or the steps S11, S12 and S14 in the method can be implemented in combination. Figure 4 The steps S11, S12 and S14 in the method can be implemented in combination.

[0238] In the embodiment of the present disclosure, when the terminal actually transmits one PTRS port corresponding to the PTRS reference signal, the terminal can determine the DMRS port actually associated with the PTRS port based on the association relationship between the PTRS port and the DMRS port, thereby improving the estimation accuracy of the phase noise source under the multi-antenna panel.

[0239] In the reference signal transmission method provided in the embodiment of the present disclosure, it is determined that the terminal actually transmits a plurality of PTRS ports corresponding to the PTRS reference signal, that is, M is greater than 1, and the association relationship between the PTRS port and the DMRS port is determined.

[0240] In some embodiments, the association relationship between the PTRS port and the DMRS port includes at least one of the following:

[0241] (a) each of the M PTRS ports is associated with the DMRS port with the smallest DMRS port index in the DMRS port group sharing the PTRS port;

[0242] (b) according to the PTRS port index order, the M PTRS ports are divided into T groups of PTRS ports, and different PTRS ports in the T groups of PTRS ports are associated with different DMRS ports in different DMRS port groups, wherein each DMRS port group in the different DMRS port groups shares the same PTRS port, and T is a positive integer less than or equal to M;

[0243] (c) each of the M PTRS ports is associated with the DMRS port corresponding to any one fixed DMRS port index in the DMRS port group sharing the PTRS port.

[0244] The following will take the terminal actually transmitting two PTRS ports corresponding to the PTRS reference signal as an example to illustrate the association relationship between the PTRS port and the DMRS port in the form of an exemplary embodiment,

[0245] For the above-mentioned mode (a), for example, the DMRS group 1 corresponding to the PTRS port 1 includes DMRS0 and DMRS1. The DMRS group 2 corresponding to the PTRS port 2 includes DMRS0 and DMRS1. Then, the PTRS port 1 and the PTRS port 2 are respectively associated with the DMRS0 in the respective DMRS groups.

[0246] For the above-mentioned manner (b), for example, DMRS group 1 corresponding to PTRS port 1 includes DMRS0 and DMRS1. DMRS group 2 corresponding to PTRS port 2 includes DMRS0 and DMRS1. Then, PTRS port 1 is associated with DMRS0 in DMRS group 1, and PTRS port 2 is associated with DMRS1 in DMRS group 2.

[0247] For the above-mentioned manner (c), for example, DMRS group 1 corresponding to PTRS port 1 includes DMRS0 and DMRS1. DMRS group 2 corresponding to PTRS port 2 includes DMRS0 and DMRS1. Then, PTRS port 1 and PTRS port 2 are both associated with DMRS0 or DMRS1 in the respective DMRS group.

[0248] In some embodiments, the association relationship between the PTRS port and the DMRS port can further include that each of the M PTRS ports is associated with a DMRS port with the largest DMRS port index in the DMRS port group sharing the PTRS port.

[0249] Of course, the association relationship between the PTRS port and the DMRS port can not only include the above-mentioned exemplary association relationship, but also include other predefined association relationships, which are not limited in the embodiments of the present disclosure.

[0250] It is further explained that in the above-mentioned exemplary association relationship, the association relationship between the PTRS port and the DMRS port can include different combinations. For example, the above-mentioned combination of (a) and (b), the combination of (a) and (c), and the like. The embodiments of the present disclosure are not limited here, and the specific association relationship or combination form of the association relationship is determined based on the actual situation.

[0251] In addition, the association relationship between the PTRS port and the DMRS port involved in the embodiments of the present disclosure can be implemented in combination with steps S11 and S12 in Figure 3 , or in combination with steps S11, S12 and S14 in Figure 4 .

[0252] In the embodiments of the present disclosure, when the terminal actually transmits more than one PTRS port corresponding to the PTRS reference signal, the terminal can determine the DMRS port actually associated with the PTRS port based on the association relationship between the PTRS port and the DMRS port, thereby improving the estimation accuracy of the phase noise source under the multi-antenna panel.

[0253] The embodiments of the present disclosure also provide a PTRS port determination method, as shown in Figure 5 , including the following steps:

[0254] In step S21, it is determined that the transmission mode adopted by the terminal for uplink transmission includes codebook-based PUSCH transmission.

[0255] In step S22, the TPMI information is received.

[0256] Optionally, the TPMI information can be carried in DCI signaling.

[0257] Optionally, the TPMI is used to indicate M PTRS ports. For example, the TPMI is carried in DCI signaling, the terminal receives the DCI signaling, and the TPMI information is received based on the DCI signaling.

[0258] In step S23, the M PTRS ports are determined based on the antenna port group corresponding to the actual transmission layer indicated by the TPMI information.

[0259] In some embodiments, the terminal determines the M PTRS ports based on one or more of the maximum number of PTRS ports, the number of antenna port groups, and the TPMI information.

[0260] In an exemplary embodiment, the maximum number of PTRS ports is 2 or 4, the antenna port group corresponding to the actual transmission layer indicated by the TPMI corresponds to the same antenna port group, and M = 1.

[0261] In an exemplary embodiment, the maximum number of PTRS ports is 2 or 4, the number of antenna port groups is 2 groups, and the antenna port group corresponding to the actual transmission layer indicated by the TPMI is different antenna port groups, and M = 2.

[0262] In an exemplary embodiment, the maximum number of PTRS ports is 2 or 4, the number of antenna port groups is 4 groups, and the antenna port group corresponding to the actual transmission layer indicated by the TPMI is different antenna port groups, and M = 2.

[0263] In an exemplary embodiment, the maximum number of PTRS ports is 4, the antenna port group is divided into 4 groups, and the antenna port group corresponding to the actual transmission layer indicated by the TPMI is one antenna port group, and M = 1.

[0264] In an exemplary embodiment, the maximum number of PTRS ports is 4, the antenna port group is divided into 4 groups, and the antenna port group corresponding to the actual transmission layer indicated by the TPMI is three different antenna port groups, and M = 3.

[0265] In an exemplary embodiment, the maximum number of PTRS ports is 4, the antenna port group is divided into 4 groups, and the antenna port group corresponding to the actual transmission layer indicated by the TPMI is four different antenna port groups, and M = 4.

[0266] In the embodiment of the present disclosure, under the codebook-based PUSCH transmission, by receiving the TPMI information, the M PTRS ports are determined based on the antenna port group corresponding to the actual transmission layer indicated by the TPMI information, so that the PTRS ports corresponding to the actual transmission PTRS reference information of the terminal can be determined.

[0267] It should be noted that the embodiments shown in Figure 5 may be implemented alone, that is, the embodiments shown in Figure 5 When the embodiments shown in Figure 5 are implemented alone, the terminal can determine that the transmission mode adopted for uplink transmission is codebook-based PUSCH transmission, receive TPMI information, and determine M PTRS ports based on the antenna port group corresponding to the actual transmission layer indicated by the TPMI information; and the present disclosure does not limit how to determine the association relationship between the M PTRS ports and the DMRS ports. As shown in Figure 5 The embodiments shown in Figure 5 may also be implemented in combination with other embodiments of the present disclosure, for example, in combination with the embodiments shown in Figure 3 , that is, determining that the number of antenna groups of the terminal is at most 4, determining that the maximum number of PTRS ports is N, determining that the PTRS-DMRS association relationship indication field is not included in the DCI and the TRI indicated by the DCI is greater than 1, determining that the transmission mode adopted for uplink transmission of the terminal includes codebook-based PUSCH transmission, receiving TPMI information, determining M PTRS ports based on the antenna port group corresponding to the actual transmission layer indicated by the TPMI information, and determining the association relationship between the M PTRS ports corresponding to the actual transmission PTRS reference signal of the terminal and the DMRS ports. Further, as shown in Figure 5 The embodiments shown in Figure 5 may also be implemented in combination with other embodiments of the present disclosure, for example, in combination with the embodiments shown in Figure 4 .

[0268] The present disclosure also provides a PTRS port determination method, as shown in Figure 6 , comprising the following steps:

[0269] In step S31, the transmission mode adopted for uplink transmission of the terminal is non-codebook-based PUSCH transmission.

[0270] In step S32, SRI information is received.

[0271] The SRI information can be carried in DCI signaling.

[0272] Optionally, the SRI is used to indicate M PTRS ports. For example, the SRI is carried in DCI signaling, the terminal receives the DCI signaling, and the SRI information is received based on the DCI signaling.

[0273] In step S33, M PTRS ports and the DMRS port groups corresponding to the M PTRS ports are determined based on the PTRS port indexes corresponding to the SRS resources indicated by the SRI information respectively.

[0274] In some embodiments, the terminal determines the M PTRS ports based on one or more of the maximum number of PTRS ports, the number of antenna port groups, and the SRI information.

[0275] In an exemplary embodiment, the maximum number of PTRS ports is 2 or 4, the SRS resource indicated by the SRI information corresponds to one PTRS port index, and M = 1.

[0276] In an exemplary embodiment, the maximum number of PTRS ports is 2 or 4, the number of antenna port groups is 2 groups, and the SRS resource indicated by the SRI information corresponds to different PTRS port indexes, and M = 2.

[0277] In an exemplary embodiment, the maximum number of PTRS ports is 2 or 4, the number of antenna port groups is 4 groups, and the SRS resource indicated by the SRI information corresponds to different PTRS port indexes, and M = 2.

[0278] In an exemplary embodiment, the maximum number of PTRS ports is 4, the number of antenna port groups is 4 groups, and the SRS resource indicated by the SRI information corresponds to one PTRS port index, and M = 1.

[0279] In an exemplary embodiment, the maximum number of PTRS ports is 4, the number of antenna port groups is 4 groups, and the SRS resource indicated by the SRI information corresponds to three PTRS port indexes, and M = 3.

[0280] In an exemplary embodiment, the maximum number of PTRS ports is 4, the number of antenna port groups is 4 groups, and the SRS resource indicated by the SRI information corresponds to four PTRS port indexes, and M = 4.

[0281] In some embodiments, the PTRS port indexes are used to indicate the SRS resources sharing the same PTRS port and the corresponding DMRS ports, so that the terminal can determine the DMRS port groups corresponding to the PTRS ports based on the SRI information.

[0282] In the embodiments of the present disclosure, under the non-codebook-based PUSCH transmission, by receiving the SRI information, M PTRS ports and the DMRS port groups corresponding to the M PTRS ports are determined based on the PTRS port indexes corresponding to the SRS resources indicated by the SRI information respectively, so that the PTRS port corresponding to the actual PTRS reference information transmitted by the terminal and the DMRS port groups corresponding to the PTRS ports can be determined.

[0283] It should be noted that the embodiments as shown in Figure 6 may be implemented alone, i.e. the embodiments as shown in Figure 6 When the embodiments as shown in Figure 6 are implemented alone, the terminal can determine that the transmission mode adopted for uplink transmission is non-codebook-based PUSCH transmission, receive SRI information, determine M PTRS ports and DMRS port groups corresponding to the M PTRS ports respectively based on the PTRS port indexes corresponding to the sounding reference signal (SRS) resources indicated by the SRI information, and determine the association relationship between the M PTRS ports and the DMRS ports. The embodiments of the present disclosure do not limit how to determine the association relationship between the M PTRS ports and the DMRS ports. The embodiments as shown in Figure 6 may also be implemented in combination with other embodiments of the present disclosure, for example, in combination with the embodiments as shown in Figure 3 , i.e. determining that the number of antenna groups of the terminal is at most 4, determining that the maximum number of PTRS ports is N, determining that the PTRS-DMRS association relationship indication field is not included in the DCI and the TRI indicated by the DCI is greater than 1, determining that the transmission mode adopted by the terminal for uplink transmission includes non-codebook-based PUSCH transmission, receiving SRI information, determining M PTRS ports and DMRS port groups corresponding to the M PTRS ports respectively based on the PTRS port indexes corresponding to the sounding reference signal (SRS) resources indicated by the SRI information, and determining the association relationship between the M PTRS ports and the DMRS ports corresponding to the PTRS reference signal actually transmitted by the terminal. Further, the embodiments as shown in Figure 6 may also be implemented in combination with other embodiments of the present disclosure, for example, in combination with the embodiments as shown in Figure 4 .

[0284] Based on the same concept, the embodiments of the present disclosure also provide a reference signal transmission method performed by a network device.

[0285] Figure 7 is a flowchart of a reference signal transmission method according to an exemplary embodiment, as shown in Figure 7 , the reference signal transmission method is performed by a network device, including the following steps.

[0286] In step S41, it is determined that the maximum number of PTRS ports is N, and the number of PTRS ports corresponding to the PTRS reference signal actually transmitted by the terminal is M.

[0287] Wherein, N is a positive integer, and M is a positive integer less than or equal to N.

[0288] In some embodiments, the network device determines the maximum number of PTRS ports based on at least one of the following: terminal capability, protocol specification.

[0289] For example, the network device determines the maximum number of PTRS ports supported by the terminal based on the terminal capability information reported by the terminal. For another example, the terminal determines the maximum number of PTRS ports based on a protocol.

[0290] In a possible implementation, the network device receives the capability information, and determines the maximum number of PTRS ports supported by the terminal as N based on the capability information.

[0291] In a possible implementation, the network device determines the maximum number of PTRS ports as N, and sends configuration information so that the terminal determines the maximum number of PTRS ports based on the configuration information.

[0292] In a possible implementation, the network device receives the capability information, configures the maximum number of PTRS ports for the terminal based on the capability information, and sends the configuration information, and the terminal determines the maximum number of PTRS ports based on the configuration information.

[0293] It is worth noting that the maximum number of PTRS ports supported by the terminal and the maximum number of PTRS ports configured by the network device can be the same or different.

[0294] In step S42, the DCI is sent, the DCI does not include the PTRS-DMRS association indication field, and the TRI indicated by the DCI is greater than 1.

[0295] In some embodiments, whether the PTRS-DMRS association indication field is included in the DCI is determined based on first signaling configuration. For example, the first signaling can be radio resource control (RRC) signaling. For another example, the first signaling is mainly used to configure whether the PTRS-DMRS association indication field is included in the DCI, for example, it can be RRC signaling, but it can also be other signaling, and the embodiments of the present disclosure are not limited here.

[0296] In some embodiments, the TRI is carried in the DCI. In other embodiments, the TRI is used to indicate the number of transmission layers, and the TRI can also be carried in other signaling.

[0297] A special case is that the TRI is 1, and there is no need to determine the association between the PTRS port and the DMRS port, and the PTRS port corresponding to the PTRS reference signal sent by the terminal is by default associated with the DMRS port.

[0298] In step S43, the association between the M PTRS ports and the DMRS ports is determined based on the DMRS ports corresponding to the M PTRS ports, respectively.

[0299] M is the number of PTRS ports corresponding to the actual transmission of the terminal, and N is the maximum number of PTRS ports, so the number of M PTRS ports corresponding to the actual transmission of the terminal is less than or equal to N, and M is a positive integer. In some embodiments, the network device determines the M PTRS ports based on the transmission mode used by the terminal for uplink transmission.

[0300] Optionally, the transmission mode used by the terminal for uplink transmission includes codebook-based PUSCH transmission or non-codebook-based PUSCH transmission.

[0301] In some embodiments, the network device determines that the transmission mode used by the terminal for uplink transmission is codebook-based PUSCH transmission, and the network device can indicate the M PTRS ports based on the TPMI information. For example, the antenna port group corresponding to the actual transmission layer indicated based on the TPMI information indicates the M PTRS ports. For details, see the embodiment shown in Figure 9 The embodiments of the present disclosure will not be described in detail here.

[0302] In some embodiments, the network device determines that the transmission mode used by the terminal for uplink transmission is non-codebook-based PUSCH transmission, and the network device can indicate the M PTRS ports based on the SRI information. For example, the PTRS port index corresponding to the SRS resource indicated based on the SRI information indicates the M PTRS ports. For details, see the embodiment shown in Figure 10 The embodiments of the present disclosure will not be described in detail here.

[0303] In some embodiments, the PUSCH type corresponding to the uplink transmission of the terminal includes at least one of the following: scheduled PUSCH; unscheduled PUSCH type 1; and unscheduled PUSCH type 2.

[0304] In some embodiments, the network device determines the association relationship between the M PTRS ports and the DMRS ports based on a default rule. In some embodiments, the default rule includes the number of code words. For example, the network device indicates that the terminal actually transmits a single PTRS port, that is, M is 1. The network device can determine the association relationship between the single PTRS port and the DMRS port based on the number of code words transmitted by the terminal.

[0305] In one embodiment, the terminal in the embodiments of the present disclosure has 8 antennas, supports uplink transmission of a maximum of 8 layers, and supports a maximum of 2 code words. In one embodiment, the terminal transmits one code word CW0 corresponding to 1-4 layers, and transmits two code words CW0 and CW1 corresponding to 5-8 layers.

[0306] For example, when the terminal transmits one code point, the network device determines that the single PTRS port is associated with the DMRS port with the smallest DMRS port index among all DMRS ports. For another example, when the terminal transmits two code words, the network device can determine the association between the single PTRS port and the DMRS port based on the MCS level of the code word. For example, when the terminal transmits two code words, the network device determines that the single PTRS port is associated with the DMRS port with the smallest DMRS port index in the DMRS port group corresponding to the code word with the higher MCS level. Of course, the association between the single PTRS port and the DMRS port is not limited to the above exemplary description, and the association between the single PTRS port and the DMRS port can be seen from the following examples, which will not be described in detail herein.

[0307] Optionally, the number of code points transmitted by the terminal indicates the number of code words corresponding to the PUSCH transmission of the terminal. Of course, in some embodiments, the number of code points transmitted by the terminal can also indicate the number of code words corresponding to other channel transmissions of the terminal. Here, the number of code points transmitted by the terminal is uniformly described, and will not be described again below.

[0308] In some embodiments, the network device instructs the terminal to actually send a plurality of PTRS reference signals corresponding to a plurality of PTRS ports, i.e., M is greater than 1. The network device can determine the association between the M PTRS ports and the DMRS ports based on a default rule. For example, the default rule can be that each of the M PTRS ports is associated with the DMRS port with the smallest DMRS port index in the DMRS port group sharing the PTRS port. For another example, the default rule can be that each of the M PTRS ports is associated with the DMRS port corresponding to any one fixed DMRS port index in the DMRS port group sharing the PTRS port. Of course, the association between the M PTRS ports and the DMRS ports is not limited to the above exemplary description, and the association between the M PTRS ports and the DMRS ports can be seen from the following examples, which will not be described in detail herein.

[0309] In the embodiment of the present disclosure, the network device determines the maximum number of PTRS ports as N, and the number of PTRS ports corresponding to the PTRS reference signal actually transmitted by the terminal, transmits the downlink control information DCI, and if the PTRS-DMRS association indication field is not included in the DCI and the TRI indicated by the DCI is greater than 1; based on the DMRS ports corresponding to the M PTRS ports respectively, the association relationship between the M PTRS ports and the DMRS ports is determined, so that the terminal can also determine the association relationship between the M PTRS ports corresponding to the PTRS reference signal actually transmitted by the terminal and the DMRS ports when the PTRS-DMRS association indication field is not included in the DCI, thereby improving the estimation accuracy of the phase noise source under the multi-antenna panel.

[0310] In the embodiment of the present disclosure, there is no strict execution order between steps S41 and S42. In some embodiments, the determination of the maximum number of PTRS ports in step S41 can be performed first, and then the transmission of DCI in step S42 is performed, and then the determination of the number of PTRS ports corresponding to the PTRS reference signal actually transmitted by the terminal in step S41 is performed. In another embodiment, step S42 can be performed first, and then step S41 is performed. The execution order of steps S41 and S42 is only exemplary and is not limited.

[0311] The embodiment of the present disclosure also provides a flowchart of a reference signal transmission method, as shown in Figure 8 , comprising the following steps.

[0312] In step S41, the maximum number of PTRS ports is determined as N, and the number of PTRS ports corresponding to the PTRS reference signal actually transmitted by the terminal is determined as M.

[0313] In step S42, DCI is transmitted, and the PTRS-DMRS association indication field is not included in the DCI and the TRI indicated by the DCI is greater than 1.

[0314] In step S43, based on the DMRS ports corresponding to the M PTRS ports respectively, the association relationship between the M PTRS ports and the DMRS ports is determined.

[0315] The specific implementation of steps S41, S42 and S43 can be referred to the specific implementation of steps S41, S42 and S43 in Figure 7 , and the embodiment of the present disclosure will not be described here.

[0316] In step S44, based on the DMRS ports associated with the M PTRS ports respectively, the PTRS reference signal is received.

[0317] In the embodiments of the present disclosure, the network device can receive the PTRS reference signal based on the DMRS ports respectively associated with the M PTRS ports, thereby improving the estimation accuracy of the phase noise source under the multi-antenna panel.

[0318] In the embodiments of the present disclosure, there is no strict execution sequence between the step S41 and the step S42. In some embodiments, the step S41 of determining the maximum number of PTRS ports can be performed first, and then the step S42 of sending the DCI is performed, and then the step S41 of determining the number of PTRS ports corresponding to the PTRS reference signal actually transmitted by the terminal is performed. In other embodiments, the step S42 can be performed first, and then the step S41 is performed. The execution sequence of the step S41 and the step S42 is only exemplarily described, and the execution sequence of the step S41 and the step S42 is not limited.

[0319] The association relationship between the M PTRS ports and the DMRS ports will be described in detail below.

[0320] In the reference signal transmission method provided in the embodiments of the present disclosure, it is determined that the terminal actually transmits the PTRS reference signal corresponding to a single PTRS port, that is, M is 1, and the association relationship between the PTRS port and the DMRS port can be determined based on the number of code words transmitted by the terminal.

[0321] In some embodiments, the association relationship between the PTRS port and the DMRS port includes at least one of the following:

[0322] (1) The number of code words transmitted by the terminal is 1, and the PTRS port is associated with the DMRS port with the smallest DMRS port index in all DMRS ports;

[0323] (2) The number of code words transmitted by the terminal is 1, and the PTRS port is associated with the DMRS port with the smallest DMRS port index in the DMRS port group sharing the PTRS port;

[0324] (3) The number of code words transmitted by the terminal is 2, and the PTRS port is associated with the DMRS port with the smallest DMRS port index in the DMRS port group sharing the PTRS port corresponding to the code word pair with a higher modulation and coding strategy (MCS) level;

[0325] (4) The number of code words transmitted by the terminal is 2, and the MCS levels of different code words are the same, and the PTRS port is associated with the DMRS port with the smallest DMRS port index in the DMRS port group corresponding to the first code word CW0;

[0326] (5) The number of code words transmitted by the terminal is 1 or 2, and the PTRS port is associated with the DMRS port corresponding to any one DMRS index in the DMRS port group sharing the PTRS port.

[0327] In an embodiment, for the above association relationship (1), the antenna group is 1, and the transmission between each antenna is full-coherent transmission. For example, the PTRS port is associated with the DMRS port with DMRS port index "0".

[0328] In an embodiment, for the above association relationship (2), the antenna group is 2 or 4, and the transmission between each antenna is partial-coherent transmission. For example, when the antenna group is 2, each group includes 4 PTRS ports, and the PTRS ports are associated with the DMRS port with DMRS port index "0" in the DMRS port group sharing the PTRS ports.

[0329] In some embodiments, the association relationship between the PTRS port and the DMRS port can further include at least one of the following:

[0330] (6) The number of codewords transmitted by the terminal is 1, and the PTRS port is associated with the DMRS port with the largest DMRS port index in all DMRS ports;

[0331] (7) The number of codewords transmitted by the terminal is 1, and the PTRS port is associated with the DMRS port with the largest DMRS port index in the DMRS port group sharing the PTRS port;

[0332] (8) The number of codewords transmitted by the terminal is 2, and the PTRS port is associated with the DMRS port with the largest DMRS port index in the DMRS port group corresponding to the codeword with a higher MCS level sharing the PTRS port.

[0333] In some embodiments, the association relationship between the PTRS port and the DMRS port can further include that the PTRS port is cyclic, that is, the PTRS port corresponding to each transmission of the PTRS reference signal corresponds to different DMRS ports based on the order of the DMRS port index.

[0334] Of course, the association relationship between the PTRS port and the DMRS port can not only include the above exemplary association relationship, but also include other predefined association relationships, which are not limited in the embodiments of the present disclosure.

[0335] Further, in the above exemplary association relationship, the association relationship between the PTRS port and the DMRS port can include different combinations. For example, the combination of (1) and (3), the combination of (1) and (4), the combination of (1), (4) and (5), and the like. The specific association relationship or combination form of the association relationship is determined based on the actual situation, which is not limited in the embodiments of the present disclosure.

[0336] In addition, the association relationship between the PTRS port and the DMRS port involved in the embodiments of the present disclosure can be associated withFigure 7 Steps S41 and S42 in FIG. 4 can be implemented in combination with steps S43 and S44 in FIG. 4. Figure 8 Steps S41, S42, and S44 in FIG. 4 can be implemented in combination.

[0337] In the embodiments of the present disclosure, when the network device configures the terminal to actually send one PTRS port corresponding to the PTRS reference signal, the network device configures the association relationship between the PTRS and the DMRS port based on the DMRS port corresponding to the PTRS port, so that the terminal determines the DMRS port actually associated with the PTRS port, and improves the estimation accuracy of the phase noise source under the multi-antenna panel.

[0338] In the reference signal transmission method provided in the embodiments of the present disclosure, it is determined that the terminal actually sends a plurality of PTRS ports corresponding to the PTRS reference signal, that is, M is greater than 1, and the association relationship between the PTRS port and the DMRS port is determined.

[0339] In some embodiments, the association relationship between the PTRS port and the DMRS port includes at least one of the following:

[0340] (a) each of the M PTRS ports is associated with the DMRS port with the smallest DMRS port index in the DMRS port group sharing the PTRS port;

[0341] (b) according to the PTRS port index order, the M PTRS ports are divided into T groups of PTRS ports, and different PTRS ports in the T groups of PTRS ports are associated with different DMRS ports in different DMRS port groups, wherein each DMRS port group in the different DMRS port groups shares the same PTRS port, and T is a positive integer less than or equal to M;

[0342] (c) each of the M PTRS ports is associated with the DMRS port corresponding to any one fixed DMRS port index in the DMRS port group sharing the PTRS port.

[0343] The following will take the terminal actually sending two PTRS ports corresponding to the PTRS reference signal as an example to illustrate the association relationship between the PTRS port and the DMRS port in the form of an exemplary embodiment,

[0344] For the above-mentioned mode (a), for example, the DMRS group 1 corresponding to the PTRS port 1 includes DMRS0 and DMRS1. The DMRS group 2 corresponding to the PTRS port 2 includes DMRS0 and DMRS1. Then, the PTRS port 1 and the PTRS port 2 are respectively associated with DMRS0 in the respective DMRS groups.

[0345] For the above-mentioned manner (b), for example, DMRS group 1 corresponding to PTRS port 1 includes DMRS0 and DMRS1. DMRS group 2 corresponding to PTRS port 2 includes DMRS0 and DMRS1. Then, PTRS port 1 is associated with DMRS0 in DMRS group 1, and PTRS port 2 is associated with DMRS1 in DMRS group 2.

[0346] For the above-mentioned manner (c), for example, DMRS group 1 corresponding to PTRS port 1 includes DMRS0 and DMRS1. DMRS group 2 corresponding to PTRS port 2 includes DMRS0 and DMRS1. Then, PTRS port 1 and PTRS port 2 are both associated with DMRS0 or DMRS1 in the respective DMRS group.

[0347] In some embodiments, the association relationship between the PTRS port and the DMRS port can further include that each of the M PTRS ports is associated with a DMRS port with the largest DMRS port index in the DMRS port group sharing the PTRS port.

[0348] Of course, the association relationship between the PTRS port and the DMRS port can not only include the above-mentioned exemplary association relationship, but also include other predefined association relationships, which are not limited in the embodiments of the present disclosure.

[0349] It is further explained that in the above-mentioned exemplary association relationship, the association relationship between the PTRS port and the DMRS port can include different combinations. For example, the combination of (a) and (b) above, the combination of (a) and (c), and the like. The embodiments of the present disclosure are not limited here, and the specific association relationship or combination form of the association relationship is determined based on the actual situation.

[0350] In addition, the association relationship between the PTRS port and the DMRS port involved in the embodiments of the present disclosure can be implemented in combination with steps S11 and S12 in Figure 7 , or in combination with steps S11, S12 and S14 in Figure 8 .

[0351] In the embodiments of the present disclosure, when the network device determines that the terminal actually transmits a PTRS reference signal corresponding to more than one PTRS port, the network device configures the association relationship between the PTRS and the DMRS port based on the DMRS port corresponding to the PTRS port, so that the terminal determines the DMRS port actually associated with the PTRS port, and improves the estimation accuracy of the phase noise source under the multi-antenna panel.

[0352] The embodiments of the present disclosure also provide a PTRS port determination method, such as Figure 9As shown, comprising the following steps:

[0353] In step S51, it is determined that the transmission mode adopted by the terminal for uplink transmission includes codebook-based PUSCH transmission.

[0354] In step S52, the TPMI information is sent.

[0355] Optionally, the TPMI information can be carried in DCI signaling.

[0356] Optionally, the TPMI is used to indicate M PTRS ports. For example, the TPMI is carried in DCI signaling, and the network sends the TPMI information through DCI signaling.

[0357] In some embodiments, the network device configures M PTRS ports for the terminal based on one or more of the maximum number of PTRS ports, the number of antenna port groups.

[0358] In an exemplary embodiment, the maximum number of PTRS ports is 2 or 4, and the network device can configure the antenna port groups corresponding to the actual transmission layers indicated by the TPMI to correspond to the same antenna port group, then M=1.

[0359] In an exemplary embodiment, the maximum number of PTRS ports is 2 or 4, the number of antenna port groups is 2 groups, and the network device can configure the antenna port groups corresponding to the actual transmission layers indicated by the TPMI to be different antenna port groups, then M=2.

[0360] In an exemplary embodiment, the maximum number of PTRS ports is 2 or 4, the number of antenna port groups is 4 groups, and the network device can configure the antenna port groups corresponding to the actual transmission layers indicated by the TPMI to be different antenna port groups, then M=2.

[0361] In an exemplary embodiment, the maximum number of PTRS ports is 4, the number of antenna port groups is 4 groups, and the network device can configure the antenna port groups corresponding to the actual transmission layers indicated by the TPMI to be one antenna port group, then M=1.

[0362] In an exemplary embodiment, the maximum number of PTRS ports is 4, the number of antenna port groups is 4 groups, and the network device can configure the antenna port groups corresponding to the actual transmission layers indicated by the TPMI to be three different antenna port groups, then M=3.

[0363] In an exemplary embodiment, the maximum number of PTRS ports is 4, the number of antenna port groups is 4 groups, and the network device can configure the antenna port groups corresponding to the actual transmission layers indicated by the TPMI to be four different antenna port groups, then M=4.

[0364] In the embodiment of the present disclosure, under the codebook-based PUSCH transmission, the network device enables the terminal to determine the PTRS port corresponding to the PTRS reference information actually transmitted by the terminal based on the TPMI information by sending the TPMI information.

[0365] It should be noted that the embodiment as shown in Figure 9 may be implemented alone, that is, the embodiment as shown in Figure 9 is implemented alone, the network device determines that the transmission mode adopted by the terminal for uplink transmission is codebook-based PUSCH transmission, and sends TPMI information for indicating the terminal to determine M PTRS ports; and the network device adopts what kind of mode to configure the association relationship between the M PTRS ports and the DMRS ports is not limited by the embodiment of the present disclosure. The embodiment as shown in Figure 9 may also be implemented in combination with other embodiments of the present disclosure, for example, in combination with the embodiment as shown in Figure 7 , that is, determining that the maximum number of PTRS ports is N, sending DCI, the DCI does not include the PTRS-DMRS association relationship indication field and the TRI indicated by the DCI is greater than 1, determining that the transmission mode adopted by the terminal for uplink transmission includes codebook-based PUSCH transmission, sending TPMI information, indicating the terminal to determine M PTRS ports, and configuring the association relationship between the M PTRS ports and the DMRS ports. Further, the embodiment as shown in Figure 9 may also be implemented in combination with other embodiments of the present disclosure, for example, in combination with the embodiment as shown in Figure 8 .

[0366] In the reference signal transmission method provided in the embodiment of the present disclosure, a method for determining a PTRS port is also provided, as shown in Figure 10 , comprising the following steps:

[0367] In step S61, it is determined that the transmission mode adopted by the terminal for uplink transmission is non-codebook-based PUSCH transmission.

[0368] In step S62, SRI information is sent.

[0369] Optionally, the SRI information can be carried in DCI signaling.

[0370] Optionally, the SRI is used to indicate M PTRS ports. For example, the SRI is carried in DCI signaling, and the network device sends the SRI information by sending the DCI signaling.

[0371] In some embodiments, the network device configures the SRI information based on the maximum number of PTRS ports and the number of antenna port groups.

[0372] In an example embodiment, the maximum number of PTRS ports is 2 or 4, the network device can configure the SRS resource indicated by the SRI information to correspond to one PTRS port index, and then M = 1.

[0373] In an example embodiment, the maximum number of PTRS ports is 2 or 4, the number of antenna port groups is 2 groups, the network device can configure the SRS resource indicated by the SRI information to correspond to different PTRS port indexes, and then M = 2.

[0374] In an example embodiment, the maximum number of PTRS ports is 2 or 4, the number of antenna port groups is 4 groups, the network device can configure the SRS resource indicated by the SRI information to correspond to different PTRS port indexes, and then M = 2.

[0375] In an example embodiment, the maximum number of PTRS ports is 4, the number of antenna port groups is 4 groups, the network device can configure the SRS resource indicated by the SRI information to correspond to one PTRS port index, and then M = 1.

[0376] In an example embodiment, the maximum number of PTRS ports is 4, the number of antenna port groups is 4 groups, the network device can configure the SRS resource indicated by the SRI information to correspond to three PTRS port indexes, and then M = 3.

[0377] In an example embodiment, the maximum number of PTRS ports is 4, the number of antenna port groups is 4 groups, the network device can configure the SRS resource indicated by the SRI information to correspond to four PTRS port indexes, and then M = 4.

[0378] In some embodiments, the PTRS port index is used to indicate the SRS resource sharing the same PTRS port and the corresponding DMRS port, so the SRI information can also be used to indicate the DMRS port group corresponding to the PTRS port.

[0379] In the embodiments of the present disclosure, when it is determined that the terminal performs non-codebook-based PUSCH transmission, the SRI information is sent to enable the terminal to determine, based on the SRI information, the PTRS port corresponding to the PTRS reference signal actually transmitted by the terminal, and the DMRS port group corresponding to the PTRS port.

[0380] It should be noted that the embodiments shown in Figure 10 may be implemented independently, i.e., as Figure 10When the illustrated embodiments are implemented alone, the terminal can determine that the transmission mode adopted for uplink transmission is non-codebook-based PUSCH transmission, receive SRI information, determine M PTRS ports and DMRS port groups corresponding to the M PTRS ports respectively based on the PTRS port indexes corresponding to the SRS resources indicated by the SRI information, and determine the association between the M PTRS ports and the DMRS ports. The embodiments of the present disclosure do not limit how to determine the association between the M PTRS ports and the DMRS ports. For example, the terminal can determine the association between the M PTRS ports and the DMRS ports based on the SRI information. Figure 7 The illustrated embodiments can also be implemented in combination with other embodiments of the present disclosure, for example, in combination with the embodiments illustrated in FIG. 8, that is, determining that the number of antenna groups of the terminal is at most 4, determining that the maximum number of PTRS ports is N, determining that the PTRS-DMRS association indication field is not included in the DCI and the TRI indicated by the DCI is greater than 1, determining that the transmission mode adopted by the terminal for uplink transmission includes non-codebook-based PUSCH transmission, receiving SRI information, determining M PTRS ports and DMRS port groups corresponding to the M PTRS ports respectively based on the PTRS port indexes corresponding to the SRS resources indicated by the SRI information, and determining the association between the M PTRS ports and the DMRS ports corresponding to the M PTRS ports actually transmitted by the terminal for transmitting PTRS reference signals. Figure 7 The illustrated embodiments can also be implemented in combination with other embodiments of the present disclosure, for example, in combination with the embodiments illustrated in FIG. 8, that is, determining that the number of antenna groups of the terminal is at most 4, determining that the maximum number of PTRS ports is N, determining that the PTRS-DMRS association indication field is not included in the DCI and the TRI indicated by the DCI is greater than 1, determining that the transmission mode adopted by the terminal for uplink transmission includes non-codebook-based PUSCH transmission, receiving SRI information, determining M PTRS ports and DMRS port groups corresponding to the M PTRS ports respectively based on the PTRS port indexes corresponding to the SRS resources indicated by the SRI information, and determining the association between the M PTRS ports and the DMRS ports corresponding to the M PTRS ports actually transmitted by the terminal for transmitting PTRS reference signals. Figure 10 The illustrated embodiments can also be implemented in combination with other embodiments of the present disclosure, for example, in combination with the embodiments illustrated in FIG. 8, that is, determining that the number of antenna groups of the terminal is at most 4, determining that the maximum number of PTRS ports is N, determining that the PTRS-DMRS association indication field is not included in the DCI and the TRI indicated by the DCI is greater than 1, determining that the transmission mode adopted by the terminal for uplink transmission includes non-codebook-based PUSCH transmission, receiving SRI information, determining M PTRS ports and DMRS port groups corresponding to the M PTRS ports respectively based on the PTRS port indexes corresponding to the SRS resources indicated by the SRI information, and determining the association between the M PTRS ports and the DMRS ports corresponding to the M PTRS ports actually transmitted by the terminal for transmitting PTRS reference signals. Figure 8 The illustrated embodiments can also be implemented in combination with other embodiments of the present disclosure, for example, in combination with the embodiments illustrated in FIG. 8, that is, determining that the number of antenna groups of the terminal is at most 4, determining that the maximum number of PTRS ports is N, determining that the PTRS-DMRS association indication field is not included in the DCI and the TRI indicated by the DCI is greater than 1, determining that the transmission mode adopted by the terminal for uplink transmission includes non-codebook-based PUSCH transmission, receiving SRI information, determining M PTRS ports and DMRS port groups corresponding to the M PTRS ports respectively based on the PTRS port indexes corresponding to the SRS resources indicated by the SRI information, and determining the association between the M PTRS ports and the DMRS ports corresponding to the M PTRS ports actually transmitted by the terminal for transmitting PTRS reference signals.

[0381] The embodiments of the present disclosure also provide a reference signal transmission method, as follows:

[0382] The terminal reports that the maximum number of phase tracking reference signal (PTRS) ports supported by the terminal is 4 through capability information.

[0383] In some embodiments, the network device configures the terminal to transmit phase tracking reference signals (PTRS) based on the capability information reported by the terminal, and configures the maximum number of phase tracking reference signal (PTRS) ports to be 4 and the maximum number of antenna groups (Ng) to be 4. If the PTRS-DMRS association indication field is not configured in the downlink control information (DCI), the default transmission mode of the physical uplink shared channel (PUSCH) phase tracking reference signal (PTRS) and the phase tracking reference signal (PTRS) of the scheduling-free physical uplink shared channel (PUSCH) type 1 are defined to be transmitted in one of the following default modes:

[0384] In some embodiments, when the network device configures phase tracking reference signal (PTRS) transmission and the number of phase tracking reference signal (PTRS) ports is maximally 1, the simultaneous transmission layer indication (TRI) > 1.

[0385] In an implementation, the terminal transmits 1 codeword (CW), and by default, the transmission is performed on the demodulation reference signal (DMRS) port with the minimum index in all demodulation reference signal (DMRS) ports, i.e., the demodulation reference signal (DMRS) port with index 0 (corresponding to the case of full coherence, i.e., antenna group number (Ng) = 1).

[0386] In an implementation, the terminal transmits 1 codeword (CW), and by default, the transmission is performed on the demodulation reference signal (DMRS) port with the minimum index in the DMRS port group sharing one phase tracking reference signal (PTRS port), i.e., the demodulation reference signal (DMRS) port with index 0 (corresponding to the case of partial coherence, i.e., Ng = 2 or 4);

[0387] In an implementation, the terminal transmits 2 codewords (CW), and by default, the transmission is performed on the demodulation reference signal (DMRS) port with the minimum index in the demodulation reference signal (DMRS) port group corresponding to the codeword (CW) with a higher modulation and coding strategy (MCS) level, i.e., the demodulation reference signal (DMRS) port with index 0;

[0388] In an implementation, the terminal transmits 2 codewords (CW), and if the modulation and coding strategy (MCS) levels corresponding to the two codewords (CW) are the same, by default, the transmission is performed on the demodulation reference signal (DMRS) port with the minimum index corresponding to CW0, i.e., the demodulation reference signal (DMRS) port with index 0;

[0389] In an implementation, the phase tracking reference signal (PTRS) is cycled

[0390] In an implementation, other predefined methods, such as transmission on any fixed demodulation reference signal (DMRS) port (non-0 port).

[0391] In some embodiments, when the network device configures phase tracking reference signal (PTRS) transmission and the actual number of phase tracking reference signal (PTRS) ports is 2, the simultaneous transmission layer indication (TRI) > 1.

[0392] In an implementation, by default, the demodulation reference signal (DMRS) port with the minimum index is selected for transmission in both demodulation reference signal (DMRS) port groups;

[0393] In an embodiment, phase tracking reference signal cycling (PTRS cycling) is implemented in two demodulation reference signal (DMRS) groups respectively

[0394] In an embodiment, other predefined methods, such as transmission on any fixed demodulation reference signal (DMRS) port, are implemented.

[0395] In some embodiments, when the network device configures phase tracking reference signal (PTRS) transmission and the maximum number of phase tracking reference signal (PTRS) ports is 4, the simultaneous transmission layer indication (TRI) is greater than 1.

[0396] In an embodiment, the DMRS port with the smallest index is selected for transmission in 1, 2, 3, or 4 demodulation reference signal (DMRS) port groups by default.

[0397] Codebook (CB) transmission is determined by precoding matrix indication (TPMI).

[0398] Non-codebook (NCB) transmission is determined by the number of phase tracking reference signal indexes (ptrsPortIndex) (0-3) corresponding to the combination of sounding reference signal (SRS) resources corresponding to the sounding reference signal resource indication (SRI).

[0399] In an embodiment, demodulation reference signal (DMRS) port index phase tracking reference signal (PTRS) cycling in different DMRS groups is implemented in 1, 2, 3, or 4 demodulation reference signal (DMRS) groups respectively.

[0400] In an embodiment, transmission is implemented on any fixed demodulation reference signal (DMRS) port (non-“0” port).

[0401] In the embodiments of the present disclosure, when the maximum number of PTRS ports is 4, the default transmission mode of the actually transmitted PTRS reference signal is solved when there is no PT-RS and DMRS association relationship indication for PTRS transmission, and the PTRS transmission can be applied to the scheduling-free type 1 PTRS transmission.

[0402] It should be noted that the various embodiments described above in relation to the present disclosure can be used in combination with the foregoing embodiments, or independently. Whether used alone or in combination with the foregoing embodiments, the implementation principle is similar. In the present disclosure, some embodiments are described as embodiments used together. Of course, those skilled in the art can understand that such examples are not a limitation of the present disclosure.

[0403] Based on the same concept, the present disclosure also provides a reference signal transmission device.

[0404] It can be understood that the reference signal transmission device provided by the present disclosure comprises the corresponding hardware structure and / or software module for implementing each function. In combination with the units and algorithm steps of each example disclosed in the present disclosure, the present disclosure can be realized in hardware or a combination of hardware and computer software. Whether a certain function is implemented in hardware or computer software driven hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the technical solution of the present disclosure.

[0405] Figure 11 Fig. 1 is a schematic diagram of a first reference signal transmission device according to an exemplary embodiment. Referring to Fig. 1, Figure 11 The device comprises a processing module 101 and a sending module 102.

[0406] The processing module 101 is configured to determine that the number of antenna groups of a terminal is at most 4, and determine that the maximum number of PTRS ports is N, N being a positive integer;

[0407] The processing module 101 is further configured to determine that the phase tracking reference signal (PTRS) -demodulation reference signal (DMRS) association indication field is not included in the downlink control information (DCI), and the transmission layer indication (TRI) indicated by the DCI is greater than 1;

[0408] The processing module 101 is further configured to determine the association relationship between the M PTRS ports corresponding to the actual transmission of the terminal and the DMRS ports, M being a positive integer less than or equal to N;

[0409] The sending module 102 is configured to send the PTRS reference signal based on the DMRS ports respectively associated with the M PTRS ports.

[0410] In an embodiment, N is determined to be 4, and M is determined to be 1. The association relationship between the M PTRS ports and the DMRS ports comprises at least one of the following:

[0411] The number of codewords transmitted by the terminal is 1, and the PTRS port is associated with a DMRS port with the smallest DMRS port index in all DMRS ports;

[0412] The number of codewords transmitted by the terminal is 1, and the PTRS port is associated with a DMRS port with the smallest DMRS port index in a DMRS port group sharing the PTRS port;

[0413] The number of codewords transmitted by the terminal is 2, and the PTRS port is associated with a DMRS port with the smallest DMRS port index in a DMRS port group sharing the PTRS port corresponding to a codeword with a higher modulation and coding strategy (MCS) level;

[0414] The number of codewords transmitted by the terminal is 2, and the MCS levels of different codewords are the same, and the PTRS port is associated with a DMRS port with the smallest DMRS port index in a DMRS port group corresponding to a first codeword (CW0);

[0415] The number of codewords transmitted by the terminal is 1 or 2, and the PTRS port is associated with a DMRS port corresponding to any one of DMRS indexes in a DMRS port group sharing the PTRS port.

[0416] In an implementation, it is determined that N is 4 and M is greater than 1, and the association relationship between the M PTRS ports and the DMRS ports includes at least one of the following:

[0417] Each of the M PTRS ports is associated with a DMRS port with the smallest DMRS port index in a DMRS port group sharing the PTRS port;

[0418] The M PTRS ports are divided into T groups of PTRS ports in the order of PTRS port indexes, different PTRS ports in the T groups of PTRS ports are associated with different DMRS ports in different DMRS port groups, each DMRS port group shares a same PTRS port, and T is a positive integer less than or equal to M;

[0419] Each of the M PTRS ports is associated with a DMRS port corresponding to any one of fixed DMRS port indexes in a DMRS port group sharing the PTRS port.

[0420] In an implementation, the M PTRS ports corresponding to the PTRS reference signal actually transmitted by the terminal are determined according to a transmission mode used by the terminal for uplink transmission, and the transmission mode used by the terminal for uplink transmission includes codebook-based physical uplink shared channel (PUSCH) transmission or non-codebook-based PUSCH transmission.

[0421] In an embodiment, the transmission manner used by the terminal for uplink transmission comprises codebook-based PUSCH transmission.

[0422] The apparatus further comprises a receiving module 103. The receiving module 103 is configured to receive precoding matrix indication TPMI information.

[0423] The processing module 101 is further configured to determine the M PTRS ports based on the antenna port group corresponding to the actual transmission layer indicated by the TPMI information.

[0424] In an embodiment, the transmission manner used by the terminal for uplink transmission comprises non-codebook-based PUSCH transmission.

[0425] The receiving module 103 is further configured to receive sounding reference signal resource indication SRI information.

[0426] The processing module 101 is further configured to determine the M PTRS ports and the DMRS port group corresponding to the M PTRS ports respectively based on the PTRS port index corresponding to the sounding reference signal SRS resource indicated by the SRI information.

[0427] In an embodiment, the sending module 102 is further configured to send capability information, wherein the capability information is used to indicate that the maximum number of PTRS ports supported by the terminal is N.

[0428] In an embodiment, the receiving module 103 is further configured to receive configuration information, wherein the configuration information is used to configure the maximum number of PTRS ports for the terminal.

[0429] In an embodiment, the PUSCH type corresponding to the uplink transmission of the terminal comprises at least one of the following:

[0430] Scheduling-based PUSCH;

[0431] Scheduling-free PUSCH type 1;

[0432] Scheduling-free PUSCH type 2.

[0433] As to the apparatus in the above embodiments, the specific manners in which various modules perform operations have been described in detail in the embodiments of the method, and thus will not be described here in detail.

[0434] Figure 12 is a second reference signal transmission apparatus block diagram according to an exemplary embodiment. Referring to Figure 12 The apparatus comprises a processing module 201, a sending module 202 and a receiving module 203.

[0435] The processing module 201 is configured to determine that the maximum number of PTRS ports is N, determine that the number of PTRS ports corresponding to the actual PTRS reference signal transmitted by the terminal is M, N is a positive integer, and M is a positive integer less than or equal to N;

[0436] The sending module 202 is configured to send downlink control information DCI, the DCI does not include a phase tracking reference signal PTRS-demodulation reference signal DMRS association indication field, and a transmission layer indication TRI indicated by the DCI is greater than 1.

[0437] The processing module 201 is further configured to determine the association between the M PTRS ports and the DMRS ports based on the DMRS ports respectively corresponding to the M PTRS ports.

[0438] The receiving module 203 is configured to receive the PTRS reference signal based on the DMRS ports respectively associated with the M PTRS ports.

[0439] In an implementation form, it is determined that N is 4 and M is 1, and the association between the M PTRS ports and the DMRS ports includes at least one of the following:

[0440] It is determined that the number of codewords transmitted by the terminal is 1, and the PTRS port is associated with a DMRS port with the smallest DMRS port index in all DMRS ports.

[0441] It is determined that the number of codewords transmitted by the terminal is 1, and the PTRS port is associated with a DMRS port with the smallest DMRS port index in a DMRS port group sharing the PTRS port.

[0442] It is determined that the number of codewords transmitted by the terminal is 2, and the PTRS port is associated with a DMRS port with the smallest DMRS port index in a DMRS port group corresponding to a codeword pair with a higher modulation and coding strategy MCS level.

[0443] It is determined that the number of codewords transmitted by the terminal is 2, and the MCS levels of different codewords are the same, and the PTRS port is associated with a DMRS port with the smallest DMRS port index in a DMRS port group corresponding to a first codeword CW0.

[0444] The number of codewords transmitted by the terminal is 1 or 2, and the PTRS port is associated with a DMRS port corresponding to any one of the DMRS indexes in a DMRS port group sharing the PTRS port.

[0445] In an implementation form, it is determined that N is 4 and M is greater than 1, and the association between the M PTRS ports and the DMRS ports includes at least one of the following:

[0446] Each of the M PTRS ports is associated with a DMRS port in a DMRS port group sharing the PTRS port, and each of the M PTRS ports is associated with a DMRS port corresponding to a fixed DMRS port index in the DMRS port group sharing the PTRS port.

[0447] The M PTRS ports are divided into T groups of PTRS ports in a PTRS port index order, different PTRS ports in the T groups of PTRS ports are associated with different DMRS ports in different DMRS port groups, each DMRS port group shares a same PTRS port, and T is a positive integer less than or equal to M.

[0448] Each of the M PTRS ports is associated with a DMRS port corresponding to a fixed DMRS port index in a DMRS port group sharing the PTRS port.

[0449] In an implementation, the processing module 201 is further configured to determine that a transmission mode adopted by the terminal for uplink transmission is codebook-based PUSCH transmission.

[0450] The sending module 202 is further configured to send precoding matrix indication (TPMI) information, the TPMI information being used to indicate the M PTRS ports.

[0451] In an implementation, the processing module 201 is further configured to determine that a transmission mode adopted by the terminal for uplink transmission is non-codebook-based PUSCH transmission.

[0452] The sending module 202 is further configured to send sounding reference signal resource (SRI) information, the SRI information being used to indicate the M PTRS ports and DMRS port groups corresponding to the M PTRS ports, respectively.

[0453] In an implementation, the receiving module 203 is further configured to receive capability information, the capability information being used to indicate that a maximum number of PTRS ports supported by the terminal is N.

[0454] In an implementation, the sending module 202 is further configured to send configuration information, the configuration information being used to configure the maximum number of PTRS ports.

[0455] In an implementation, the PUSCH type corresponding to the uplink transmission of the terminal includes at least one of the following:

[0456] Scheduling-based PUSCH;

[0457] Scheduling-free PUSCH type 1;

[0458] Scheduling-free PUSCH type 2.

[0459] With reference to the apparatus in the above-described embodiments, a specific manner in which each module performs operations has been described in detail in the embodiments of the method, and thus will not be described in detail here.

[0460] Figure 13 is a schematic diagram of a first communication device according to an example embodiment. For example, the device 300 can be a mobile phone, computer, digital broadcast terminal, messaging device, gaming console, tablet device, medical device, fitness device, personal digital assistant, etc.

[0461] Referring to Figure 13 The device 300 can include one or more of the following components: a processing component 302, a memory 304, a power supply component 306, a multimedia component 308, an audio component 310, an input / output (I / O) interface 312, a sensor component 314, and a communication component 316.

[0462] The processing component 302 usually governs overall operations of the device 300, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 302 can include one or more processors 320 to execute instructions delivered from the memory 304 to complete all or part of the steps of the above-described methods. In addition, the processing component 302 can include one or more modules to facilitate interaction between the processing component 302 and other components. For example, the processing component 302 can include a multimedia module to facilitate interaction between the multimedia component 308 and the processing component 302.

[0463] The memory 304 is configured to store various types of data to support operations of the device 300. Examples of these data include instructions for any application or method operating on the device 300, contact data, phonebook data, messages, pictures, videos, etc. The memory 304 can be implemented by any type of volatile or non-volatile storage devices or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0464] The power supply component 306 provides power for various components of the device 300. The power supply component 306 can include a power supply management system, one or more power sources, and other components associated with generating, managing and distributing power for the device 300.

[0465] The multimedia component 308 includes a screen to provide an output interface between the device 300 and a user. In some embodiments, the screen can include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touch, swiping, and gestures on the touch panel. The touch sensors can not only sense a boundary of a touching or swiping action, but also detect duration and pressure related to the touching or swiping action. In some embodiments, the multimedia component 308 includes a front camera and / or a rear camera. When the device 300 is in an operation mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each of the front and rear camera can be a fixed optical lens system or have a focal length and optical zooming capability.

[0466] The audio component 310 is configured to output and / or input audio signals. For example, the audio component 310 includes a microphone (MIC) to receive an external audio signal when the device 300 is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal can be further stored in the memory 304 or transmitted via the communication component 316. In some embodiments, the audio component 310 further includes a speaker for outputting audio signals.

[0467] The I / O interface 312 provides an interface between the processing component 302 and peripheral interface modules, such as a keypad, a click wheel, buttons, and so on. The buttons can include, but are not limited to, a home button, a volume button, a start button, and a lock button.

[0468] The sensor component 314 includes one or more sensors to provide various state assessments for the device 300. For example, the sensor component 314 can detect an open / closed position of the device 300, relative positioning of components, such as a display and a keypad of the device 300, a change in position of the device 300 or a component of the device 300, presence or absence of user contact with the device 300, a change in orientation of the device 300 or acceleration / deceleration of the device 300, and temperature changes of the device 300, among other possibilities. The sensor component 314 can include a proximity sensor configured to detect presence of a nearby object without any physical touch. The sensor component 314 can further include a light sensor (e.g., a CMOS or CCD image sensor) configured to work in conjunction with the camera module 312 in an imaging application. In some embodiments, the sensor component 314 can also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0469] The communication component 316 is configured to facilitate wired or wireless communication between the device 300 and other devices. The device 300 can access a wireless network based on a communication standard, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 316 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 316 further includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0470] In an exemplary embodiment, the device 300 can be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic elements, for performing the above-described methods.

[0471] In an exemplary embodiment, a non-transitory computer readable storage medium including instructions, such as the memory 304 including instructions, is also provided, which can be executed by the processor 320 of the device 300 to complete the above-described methods. For example, the non-transitory computer readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disc, and an optical data storage device, etc.

[0472] Figure 14 is a schematic diagram of a second communication device according to an exemplary embodiment. For example, the device 400 can be provided as a network device. Referring to Figure 14 , the device 400 includes a processing component 422, which further includes one or more processors, and a memory resource represented by the memory 432, for storing instructions, such as application programs, executable by the processing component 422. The application programs stored in the memory 432 can include one or more than one module each corresponding to a set of instructions. In addition, the processing component 422 is configured to execute the instructions to perform the above-described methods.

[0473] The device 400 can also include a power supply component 426 configured to perform power management of the device 400, a wired or wireless network interface 450 configured to connect the device 400 to a network, and an input output (I / O) interface 458. The device 400 can operate based on an operating system stored in the memory 432, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM or the like.

[0474] In an example embodiment, a non-transitory computer-readable storage medium including instructions, such as the memory 432 including instructions, is also provided, which can be executed by the processing component 422 of the device 400 to complete the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disc, and an optical data storage device, etc.

[0475] The embodiments or examples of the present disclosure are not exhaustive, but are only a part of the embodiments or examples, and are not specific limitations on the protection scope of the present disclosure. Each step in a certain embodiment or example can be implemented as an independent example without contradiction, and the steps can be combined arbitrarily, for example, a scheme after removing some steps in a certain embodiment or example can be implemented as an independent example, and the order of the steps in a certain embodiment or example can be exchanged arbitrarily, in addition, the optional ways or optional examples in a certain embodiment or example can be combined arbitrarily; in addition, the embodiments or examples can be combined arbitrarily, for example, the steps of different embodiments or examples can be combined arbitrarily, a certain embodiment or example can be combined with the optional ways or optional examples of other embodiments or examples.

[0476] It can be further understood that "multiple" in the present disclosure means two or more, and other quantifiers are similar. "And / or" describes the association between the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. The character " / " generally represents that the associated objects before and after are in an "or" relationship. The singular forms "a", "said" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0477] The description mode of "A or B", "A and / or B", "at least one of A and B", "A in one case and B in another case", "A in response to one case and B in response to another case" and the like in the present disclosure can include at least one of the following technical solutions according to the case: A is executed regardless of B, that is, A in some embodiments or examples; B is executed regardless of A, that is, B in some embodiments or examples; A and B are selectively executed, that is, A and B are selected from A and B in some embodiments or examples; A and B are both executed, that is, A and B in some embodiments or examples.

[0478] It can be further understood that "in response to", "in the case of", "when", "if", "if" and the like in the present disclosure can be replaced with each other.

[0479] It will be further understood that the terms "first", "second", etc. are used to describe various information but should not be construed as requiring these pieces of information to be in a particular order. The terms are merely used to differentiate between two pieces of information of the same type, and do not imply a particular order or level of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information, without departing from the scope of the present disclosure.

[0480] In some embodiments or examples, "comprising A", "including A", "indicated to A", "carrying A" in the present disclosure can be interpreted as directly carrying A, or indirectly indicating A.

[0481] In addition, each element, each row, or each column in the table involved in the present disclosure can be implemented as an independent embodiment, and any combination of any element, any row, or any column can also be implemented as an independent embodiment.

[0482] It will be further understood that, although the operations of the present embodiments are described in a particular, sequential order, this should not be understood as requiring that the operations be performed in that order, or that all illustrated operations be performed, in order to achieve desirable results. In certain circumstances, multitasking and parallel processing can be advantageous.

[0483] Other embodiments of the present disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the features disclosed herein. It is intended that the present disclosure cover any and all variations of the present disclosure that come within the scope of the following claims and their equivalents. It is intended that the present disclosure encompass all alternatives, modifications and equivalents falling within the scope of the present disclosure as well as those now known or later devised.

[0484] It should be understood that the present disclosure is not limited to the precise structures described and illustrated above and that various modifications and changes can be made without departing from the scope of the present disclosure. The scope of the present disclosure is limited only by the claims appended hereto.

Claims

1. A reference signal transmission method, characterized by, The method is performed by a terminal, and the method comprises: determining that the number of antenna groups of the terminal is at most 4, and determining that the maximum number of PTRS ports is N, N being a positive integer; determining that no PTRS-DMRS association indication field is included in downlink control information DCI, and that the transmission layer indication TRI indicated by the DCI is greater than 1; determining the association relationship between the M PTRS ports corresponding to the actual transmission of the terminal and the DMRS ports, M being a positive integer less than or equal to N; transmitting a PTRS reference signal based on the DMRS ports associated with the M PTRS ports respectively.

2. The method of claim 1, wherein, determining that N is 4 and M is 1, and that the association relationship between the M PTRS ports and the DMRS ports comprises at least one of the following: the number of codewords transmitted by the terminal is 1, and the PTRS port is associated with a DMRS port with the smallest DMRS port index in all DMRS ports; the number of codewords transmitted by the terminal is 1, and the PTRS port is associated with a DMRS port with the smallest DMRS port index in a DMRS port group sharing the PTRS port; the number of codewords transmitted by the terminal is 2, and the PTRS port is associated with a DMRS port with the smallest DMRS port index in a DMRS port group sharing the PTRS port corresponding to a codeword pair with a higher modulation and coding strategy MCS level; the number of codewords transmitted by the terminal is 2, and the MCS levels of different codewords are the same, and the PTRS port is associated with a DMRS port with the smallest DMRS port index in a DMRS port group corresponding to a first codeword CW0; the number of codewords transmitted by the terminal is 1 or 2, and the PTRS port is associated with a DMRS port corresponding to any one of the DMRS indexes in a DMRS port group sharing the PTRS port.

3. The method of claim 1, wherein, determining that N is 4 and M is greater than 1, and that the association relationship between the M PTRS ports and the DMRS ports comprises at least one of the following: each of the M PTRS ports is associated with a DMRS port with the smallest DMRS port index in a DMRS port group sharing the PTRS port; the M PTRS ports are divided into T groups of PTRS ports in the order of PTRS port indexes, and different PTRS ports in the T groups of PTRS ports are associated with different DMRS ports in different DMRS port groups, wherein each DMRS port group shares the same PTRS port, and T is a positive integer less than or equal to M; each of the M PTRS ports is associated with a DMRS port corresponding to any one of the fixed DMRS port indexes in a DMRS port group sharing the PTRS port.

4. The method according to any one of claims 1 to 3, characterized in that, The M PTRS ports corresponding to the actual transmission of the terminal are determined according to the transmission mode used by the terminal for uplink transmission, and the transmission mode used by the terminal for uplink transmission comprises codebook-based physical uplink shared channel PUSCH transmission or non-codebook-based PUSCH transmission.

5. The method of claim 4, wherein, The transmission mode used by the terminal for uplink transmission includes codebook-based PUSCH transmission, and the method further includes: receiving precoding matrix indication TPMI information; determining the M PTRS ports based on the antenna port group corresponding to the actual transmission layer indicated by the TPMI information.

6. The method of claim 4, wherein, The transmission mode used by the terminal for uplink transmission includes non-codebook-based PUSCH transmission, and the method further includes: receiving sounding reference signal resource indication SRI information; determining the M PTRS ports and the DMRS port group corresponding to the M PTRS ports based on the PTRS port index corresponding to the sounding reference signal SRS resource indicated by the SRI information.

7. The method of claim 1, wherein, The method further includes: sending capability information, the capability information being used to indicate that the terminal supports a maximum number of PTRS ports N.

8. The method of claim 1, wherein, The method further includes: receiving configuration information, the configuration information being used to configure the terminal with a maximum number of PTRS ports.

9. The method of claim 1, wherein, The PUSCH type corresponding to the uplink transmission of the terminal includes at least one of the following: scheduled PUSCH; grant-free PUSCH type 1; grant-free PUSCH type 2.

10. A reference signal transmission method, comprising: The method is performed by a network device, and includes: determining that the maximum number of PTRS ports is N, and that the number of PTRS ports corresponding to the actual transmission of the PTRS reference signal by the terminal is M, N being a positive integer and M being a positive integer less than or equal to N; sending downlink control information DCI, the DCI not including a phase tracking reference signal PTRS-demodulation reference signal DMRS association indication field and the transmission layer indication TRI indicated by the DCI being greater than 1; determining the association between the M PTRS ports and the DMRS ports based on the DMRS ports corresponding to the M PTRS ports respectively; receiving the PTRS reference signal based on the DMRS ports associated with the M PTRS ports respectively.

11. The method of claim 10, wherein, It is determined that N is 4 and M is 1, and the association between the M PTRS ports and the DMRS ports includes at least one of the following: It is determined that the number of code words transmitted by the terminal is 1, and the PTRS port is associated with the DMRS port with the smallest DMRS port index in all DMRS ports. It is determined that the number of code words transmitted by the terminal is 1, and the PTRS port is associated with the DMRS port with the smallest DMRS port index in the DMRS port group sharing the PTRS port. It is determined that the number of code words transmitted by the terminal is 2, and the PTRS port is associated with the DMRS port with the smallest DMRS port index in the DMRS port group sharing the PTRS port corresponding to the code word pair with a higher modulation and coding strategy MCS level. It is determined that the number of code words transmitted by the terminal is 2, and the MCS levels of different code words are the same, and the PTRS port is associated with the DMRS port with the smallest DMRS port index in the DMRS port group corresponding to the first code word CW0. The number of code words transmitted by the terminal is 1 or 2, and the PTRS port is associated with the DMRS port corresponding to any one of the DMRS indexes in the DMRS port group sharing the PTRS port.

12. The method of claim 10, wherein, determining that N is 4, M is greater than 1, and an association relationship between the M PTRS ports and DMRS ports includes at least one of the following: each of the M PTRS ports is associated with a DMRS port with a smallest DMRS port index in a DMRS port group sharing the PTRS port; the M PTRS ports are divided into T groups of PTRS ports in a PTRS port index order, different PTRS ports in the T groups of PTRS ports are associated with different DMRS ports in different DMRS port groups, each of the different DMRS port groups shares a same PTRS port, and T is a positive integer less than or equal to M; each of the M PTRS ports is associated with a DMRS port corresponding to a fixed DMRS port index in any one of DMRS port groups sharing the PTRS port.

13. The method according to any one of claims 10 to 12, characterized in that, The method further includes: determining that a transmission mode used by the terminal for uplink transmission is codebook-based PUSCH transmission, and sending precoding matrix indication (TPMI) information, the TPMI information being used to indicate the M PTRS ports.

14. The method according to any one of claims 10 to 12, characterized in that, The method further includes: determining that a transmission mode used by the terminal for uplink transmission is non-codebook-based PUSCH transmission, and sending sounding reference signal resource (SRI) information, the SRI information being used to indicate the M PTRS ports and DMRS port groups corresponding to the M PTRS ports, respectively.

15. The method of claim 10, wherein, The method further includes: receiving capability information, the capability information being used to indicate that a maximum number of PTRS ports supported by the terminal is N.

16. The method of claim 10, wherein, The method further includes: sending configuration information, the configuration information being used to configure a maximum number of PTRS ports.

17. The method of claim 10, wherein, The PUSCH type corresponding to the uplink transmission of the terminal includes at least one of the following: scheduling-based PUSCH; scheduling-free PUSCH type 1; scheduling-free PUSCH type 2.

18. A first reference signal transmission apparatus, comprising: The apparatus includes: a processing module configured to determine that a number of antenna groups of a terminal is a maximum of 4, and determine that a maximum number of PTRS ports is N, N being a positive integer; the processing module is further configured to determine that a phase tracking reference signal (PTRS)-demodulation reference signal (DMRS) association relationship indication field is not included in downlink control information (DCI), and a transmission layer indication (TRI) indicated by the DCI is greater than 1; the processing module is further configured to determine an association relationship between M PTRS ports corresponding to a PTRS reference signal actually sent by the terminal and DMRS ports, M being a positive integer less than or equal to N; a sending module configured to send the PTRS reference signal based on DMRS ports respectively associated with the M PTRS ports.

19. A second reference signal transmission apparatus, comprising: The apparatus includes: a processing module configured to determine that a maximum number of PTRS ports is N, and determine that a number of PTRS ports corresponding to a PTRS reference signal actually sent by a terminal is M, N being a positive integer, and M being a positive integer less than or equal to N; The sending module is configured to send downlink control information (DCI), wherein the DCI does not include a phase tracking reference signal (PTRS)-demodulation reference signal (DMRS) association indication field and a transmission layer indication (TRI) indicated by the DCI is greater than 1. The processing module is further configured to determine an association between the M PTRS ports and the DMRS ports based on the M PTRS ports respectively corresponding to the DMRS ports. The receiving module is configured to receive a PTRS reference signal based on the M PTRS ports respectively associating with the DMRS ports.

20. A first communication device, characterized by Comprise: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to perform the reference signal transmission method of any one of claims 1-9.

21. A second communication device, characterized by Comprise: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to perform the reference signal transmission method of any one of claims 10-17.

22. A storage medium, characterized by The storage medium has instructions stored therein, and when the instructions in the storage medium are executed by a processor of a terminal, the terminal can perform the reference signal transmission method of any one of claims 1-9; or when the instructions in the storage medium are executed by a processor of a network device, the network device can perform the reference signal transmission method of any one of claims 10-17.

23. A communication system comprising a terminal and a network device, wherein, the terminal is configured to perform the method of any one of claims 1-9; the network device is configured to perform the method of any one of claims 10-17.

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