CN114731256A

CN114731256A - Downlink phase tracking reference signal PTRS transmission method and related device

Info

Publication number: CN114731256A
Application number: CN202080079579.9A
Authority: CN
Inventors: 陈文洪
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-02-10
Filing date: 2020-02-10
Publication date: 2022-07-08
Anticipated expiration: 2040-02-10
Also published as: WO2021159261A1; CN114731256B

Abstract

The embodiment of the application discloses a downlink PTRS transmission method and a related device, wherein the method comprises the following steps: the terminal determines physical resources occupied by each PTRS port in a plurality of PTRS ports, wherein the plurality of PTRS ports correspond to the same demodulation reference signal (DMRS) port; and the terminal receives the PTRS on each PTRS port on the physical resource occupied by each PTRS port. According to the embodiment of the application, the correlation of a plurality of PTRS ports by the same DMRS port can be realized, so that more accurate phase estimation can be obtained.

Description

Downlink phase tracking reference signal PTRS transmission method and related device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a downlink PTRS transmission method and a related apparatus.

Background

In a New Radio (NR) system, during downlink Phase Tracking Reference Signal (PTRS) Transmission, a network device may configure at most 2 PTRS ports, where each PTRS port corresponds to a Transmission Configuration Indicator (TCI) state and a Demodulation Reference Signal (DMRS) port of a Code Division Multiplexing (CDM) group, that is, a DMRS port of a CDM group may only be associated with one PTRS port at most.

Disclosure of Invention

The embodiment of the application provides a downlink PTRS transmission method and a related device, aiming to realize the association of a plurality of PTRS ports by the same DMRS port, thereby obtaining more accurate phase estimation.

In a first aspect, an embodiment of the present application provides a downlink PTRS transmission method, including:

the terminal determines physical resources occupied by each PTRS port in a plurality of PTRS ports, wherein the plurality of PTRS ports correspond to the same demodulation reference signal (DMRS) port;

and the terminal receives the PTRS on each PTRS port on the physical resource occupied by each PTRS port.

In a second aspect, an embodiment of the present application provides a downlink PTRS transmission method, including:

the network equipment determines physical resources occupied by each PTRS port in a plurality of PTRS ports, wherein the plurality of PTRS ports correspond to the same demodulation reference signal (DMRS) port of a terminal;

and the network equipment sends the PTRS on each PTRS port to the terminal on the physical resource occupied by each PTRS port.

In a third aspect, an embodiment of the present application provides a downlink PTRS transmission apparatus, which is applied to a terminal and includes a processing unit and a communication unit, wherein,

the processing unit is used for determining physical resources occupied by each PTRS port in a plurality of PTRS ports, wherein the plurality of PTRS ports correspond to the same DMRS port; and receiving, by the communication unit, the PTRS on each PTRS port on the physical resource occupied by the PTRS port.

In a fourth aspect, an embodiment of the present application provides a downlink PTRS transmission apparatus, which is applied to a network device, and includes a processing unit and a communication unit, where,

the processing unit is used for determining physical resources occupied by each PTRS port in a plurality of PTRS ports, wherein the plurality of PTRS ports correspond to the same DMRS port of the terminal; and sending the PTRS on each PTRS port to the terminal on the physical resource occupied by each PTRS port through the communication unit.

In a fifth aspect, embodiments of the present application provide a terminal, including a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the processor, and the program includes instructions for performing the steps of any of the methods of the first aspect of the embodiments of the present application.

In a sixth aspect, embodiments of the present application provide a network device, including a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the processor, and the program includes instructions for performing the steps of any of the methods of the second aspect of the embodiments of the present application.

In a seventh aspect, an embodiment of the present application provides a chip, including: and the processor is used for calling and running the computer program from the memory so that the device provided with the chip executes part or all of the steps described in the method of any one of the first aspect and the second aspect of the embodiment of the application.

In an eighth aspect, the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform part or all of the steps described in any one of the methods of the first aspect or the second aspect of the embodiments of the present application.

In a ninth aspect, embodiments of the present application provide a computer program, where the computer program is operable to cause a computer to perform some or all of the steps as described in any of the methods of the first or second aspects of the embodiments of the present application. The computer program may be a software installation package.

It can be seen that, in the embodiment of the present application, a terminal determines a physical resource occupied by each PTRS port in a plurality of PTRS ports, where the plurality of PTRS ports correspond to the same DMRS port, and then, the terminal receives a PTRS on each PTRS port on the physical resource occupied by each PTRS port. Therefore, the method can realize that the same DMRS port is associated with a plurality of PTRS ports, thereby obtaining more accurate phase estimation.

Drawings

Reference will now be made in brief to the drawings that are needed in describing embodiments or prior art.

Fig. 1A is a system architecture diagram of an example communication system provided by an embodiment of the present application;

fig. 1B is a schematic diagram of cooperative diversity transmission of TRP1 and TRP2 provided in an embodiment of the present application;

fig. 1C is a schematic diagram of an SDM diversity transmission 1 according to an embodiment of the present application;

fig. 1D is a schematic diagram of an SDM diversity transmission 2 according to an embodiment of the present application;

fig. 1E is a schematic diagram of an FDM diversity transmission 1 provided in the embodiment of the present application;

fig. 1F is a schematic diagram of an FDM diversity transmission 2 provided in the embodiment of the present application;

fig. 1G is a schematic diagram of a TDM diversity transmission 1 provided in the embodiment of the present application;

fig. 1H is a schematic diagram of a TDM diversity transmission 2 according to an embodiment of the present application;

fig. 2A is a flowchart illustrating a downlink PTRS transmission method according to an embodiment of the present application;

fig. 2B is a schematic diagram of RE resource configuration of two DMRS ports according to an embodiment of the present application;

fig. 2C is a schematic diagram of PRB resource configuration of two DMRS ports according to an embodiment of the present application;

fig. 2D is a schematic diagram of an OFDM symbol resource configuration of two DMRS ports according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 5 is a block diagram illustrating functional units of a downlink PTRS transmission apparatus according to an embodiment of the present disclosure;

fig. 6 is a block diagram of functional units of a downlink PTRS transmission apparatus according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

The technical solution of the embodiment of the present application may be applied to the example communication system 100 shown in fig. 1A, where the example communication system 100 includes a terminal 110 and a network device 120, and the terminal 110 is communicatively connected to the network device 120.

The example communication system 100 may be, for example: Non-Terrestrial communication Network (NTN) systems, global system for mobile communications (GSM) systems, Code Division Multiple Access (CDMA) systems, Wideband Code Division Multiple Access (WCDMA) systems, General Packet Radio Service (GPRS), Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, universal mobile telecommunications system (universal mobile telecommunications system, UMTS), universal internet access (worldwide interoperability for telecommunications, WiMAX) systems, future radio (NR 5) systems, and so on.

A terminal 110 in the embodiments of the present application may refer to a user equipment, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user device. The terminal may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a relay device, a vehicle-mounted device, a wearable device, a terminal in a future 5G network or a terminal in a future evolved Public Land Mobile Network (PLMN), and the like, which are not limited in this embodiment.

The network device 120 in the embodiment of the present application may be a device for communicating with a terminal, the network device may be a Base Transceiver Station (BTS) in a global system for mobile communications (GSM) system or a Code Division Multiple Access (CDMA) system, may be a base station (NodeB) in a Wideband Code Division Multiple Access (WCDMA) system, may be an evolved NodeB (NB), eNB or eNodeB) in an LTE system, may be a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or may be a relay device, an access point, a vehicle-mounted device, a wearable device, and a network device in a future 5G network or a network device in a future evolved PLMN network, one or a set of antenna panels (including multiple antenna panels) of a base station in a 5G system, alternatively, the network node may also be a network node that forms a gNB or a transmission point, such as a baseband unit (BBU), a Distributed Unit (DU), or the like, and the embodiment of the present application is not limited.

In some deployments, the gNB may include Centralized Units (CUs) and DUs. The gNB may also include an Active Antenna Unit (AAU). The CU implements part of the function of the gNB and the DU implements part of the function of the gNB. For example, the CU is responsible for processing non-real-time protocols and services, and implementing functions of a Radio Resource Control (RRC) layer and a Packet Data Convergence Protocol (PDCP) layer. The DU is responsible for processing a physical layer protocol and a real-time service, and implements functions of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a Physical (PHY) layer. The AAU implements part of the physical layer processing functions, radio frequency processing and active antenna related functions. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling, such as the RRC layer signaling, may also be considered to be transmitted by the DU or by the DU + AAU under this architecture. It is to be understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. In addition, the CU may be divided into network devices in an access network (RAN), or may be divided into network devices in a Core Network (CN), which is not limited in this application.

In the embodiment of the present application, the terminal 110 or the network device 120 includes a hardware layer, an operating system layer running on top of the hardware layer, and an application layer running on top of the operating system layer. The hardware layer includes hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processing through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address list, word processing software, instant messaging software and the like. Furthermore, the embodiment of the present application does not particularly limit the specific structure of the execution main body of the method provided by the embodiment of the present application, as long as the communication can be performed according to the method provided by the embodiment of the present application by running the program recorded with the code of the method provided by the embodiment of the present application, for example, the execution main body of the method provided by the embodiment of the present application may be a terminal, or a functional module in the terminal that can call the program and execute the program.

The key concepts involved in the scheme of the present application are presented below.

Physical downlink shared channel PDSCH diversity transmission (retransmission): in order to improve the transmission reliability of the PDSCH and meet the requirements of high-reliability Low-latency Communication (URLLC), NR introduces the diversity transmission of the PDSCH, i.e., the PDSCH carrying the same data is transmitted through different time slots/TRPs/redundancy versions and so on for multiple times, thereby obtaining the diversity gain and reducing the false error rate (BLER). Specifically, the diversity Transmission may be performed in a plurality of slots, or may be performed at a plurality of Transmission points (TRPs), as shown in fig. 1B, where TRP1 and TRP2 cooperate with a terminal to perform diversity Transmission of PDSCH, and ACK/NACK is positive acknowledgement/negative acknowledgement. For the multi-slot repetition, one Downlink Control Information (DCI) may schedule multiple PDSCHs carrying the same data to transmit on multiple consecutive slots, and the same frequency domain resource is used, and the number of slots is configured by a higher layer signaling. For the repetition of multiple TRPs, the PDSCH carrying the same data is simultaneously transmitted on different TRPs respectively, and different beams may be adopted (at this time, multiple TCI states need to be indicated in one DCI, and each TCI state is used for one-time repeated transmission). The repeatedly transmitted data can adopt different DMRS ports, and can also adopt the same DMRS port.

Diversity transmission based on multiple TRP: in order to meet different transmission delay and reliability requirements, six different diversity transmission schemes based on multiple TRPs are introduced into NR, and different transmission schemes adopt different diversity modes to obtain diversity gain. Both of these schemes require multiple TCI states to be indicated in DCI scheduling PDSCH, each TCI state being used for data transmission of one TRP, in order to support multiple TRP diversity transmissions.

1) Spatial Division Multiplexing (SDM) scheme 1

In SDM scheme 1, a network device may schedule data transmission of up to 4 transport layers (layers), where the data is transmitted from two TRPs separately using independent beams (corresponding to different TCI states), i.e., multiple TRPs transmit data in the same transport block on the same physical resource using different DMRS ports and beams (corresponding to different TCI states). The DMRS ports used for data transmission are from different CDM groups, and the DMRS ports of different CDM groups use different TCI states, that is, one TRP corresponds to one CDM group and one TCI state, as shown in fig. 1C.

2) SDM scheme 2: in SDM scheme 2, a network device may schedule data transmission of up to 2 transport layers (layers), with two TRPs transmitting the same data using the same time-frequency resources and the same DMRS ports (which may be 1 or 2 DMRS ports, from the same CDM group). Different beams (corresponding to different TCI states) are used for transmitting data on different TRPs, as shown in fig. 1D.

3) Frequency division multiplexing FDM scheme 1: in the FDM scheme, the network device may schedule data transmission of at most 2 transmission layers (layers), and these data are transmitted from different frequency domain resources of two TRPs respectively by using independent beams (corresponding to different TCI states), that is, multiple TRPs transmit data in the same transmission block on the same time domain resource and different frequency domain resources by using the same DMRS port and different beams (corresponding to different TCI states). Unlike the SDM scheme, DMRS ports employed by different TRPs in the FDM scheme are the same, and frequency domain resources are different. Moreover, DMRS ports used for data transmission are from the same CDM group, that is, the same DMRS ports correspond to different TCI states on different frequency domain resources, as shown in fig. 1E.

4) Frequency Division Multiplexing (FDM) scheme 2: FDM scheme 2 differs from FDM scheme 1 primarily in that different TRPs are transmitted on different frequency domain resources as independently coded codewords, rather than as different data in the same codeword. Wherein, the two code words come from the same data transmission block, but independent Redundancy Version (RV) is adopted to form different code words, and the different code words are transmitted on different frequency domain resources. The codewords of two TRP transmissions can be decoded independently, and the combining gain can also be obtained by soft bit combining, similar to two (HARQ) retransmissions of one transport block, as shown in fig. 1F.

5) Time Division Multiplexing (TDM) scheme 1: in this TDM scheme, a terminal employs different TCI states to receive the same data from different TRPs in multiple mini-slots (also called sub-slots) within one slot. One mini-slot may include a plurality of OFDM symbols, and the frequency domain resources occupied by the terminal in different mini-slots are the same. That is, multiple TRPs transmit the same data on the same frequency domain resources of different mini-slots using the same DMRS port and different beams (corresponding to different TCI states). The Modulation and Coding Scheme (MCS) used by the terminal in these mini-slots is the same, but the RV versions may be different, and at this time, the terminal may also perform soft bit combining on the data in different mini-slots, as shown in fig. 1G.

6) Time division multiplexing TDM scheme 2: TDM scheme 2 differs from TDM scheme 1 in that the same data is transmitted on different time slots, i.e., multiple TRPs transmit the same data on the same frequency domain resources of different time slots using the same DMRS port and different beams (corresponding to different TCI states), as shown in fig. 1H.

PTRS transmission: in downlink PTRS transmission, the network device may configure 2 PTRS ports at most, where each PTRS port corresponds to one TCI state and a DMRS port of one CDM group, that is, the DMRS port of the same CDM group may only be associated with one PTRS port at most. The PTRS signal on one port transmits the same signal with the DMRS port with the lowest port index in the associated CDM group (called the DMRS port associated with the PTRS port), and the adopted RE offset is determined according to the DMRS port with the lowest index (as shown in Table 1). After the terminal determines the RE offset, the physical resource for transmitting the PTRS may be determined according to the following formula:

wherein, i is 0,1, 2.,

represents the PRB offset for the PTRS port,

as shown in the table 1 below, the following examples,if the higher layer parameter resource element offset resourceementoffset is not configured in the PTRS-uplink configuration PTRS-UplinkConfig, the terminal assumes to use the value corresponding to offset00, n_RNTIRadio Network Temporary Identity (RNTI) used for Scheduling Cyclic Redundancy Check (CRC) scrambling of DCI of a PTRS (packet Radio Redundancy Check) associated DMRS port can be cell RNTI C-RNTI, configuration Scheduling RNTI (CS-RNTI), modulation coding mode-cell RNTI MCS-C-RNTI, quasi-Persistent Channel State Information-RNTI (SP-CSI-RNTI), N-CSI-RNTI_RBIs the bandwidth (PRB number), K, occupied by the PTRS-associated DMRS port_PT-RSAnd E {2,4} is the frequency domain density of the PTRS, and is determined according to the scheduled bandwidth (PRB number).

TABLE 1 PTRS RE offsets associated with different DMRS ports

In a Space Division Multiplexing (SDM) diversity Transmission scheme based on multiple TRPs, different Transmission points (TRPs) use the same time-frequency resources, the same DMRS ports and different beams to transmit the same data, so as to improve data Transmission performance.

In the SDM scheme 2, different TRPs use the same time-frequency resource, the same DMRS port, and different beams to transmit the same data, so as to improve the data transmission performance. Different crystal oscillators adopted by different TRPs can cause different phase offsets of transmitted signals, but in the prior art, one DMRS port can only be associated with one PTRS port, and the phase offsets of the signals from different TRPs cannot be effectively estimated when the same DMRS port is adopted by different TRPs, so that the performance of DMRS channel estimation is influenced.

In view of the above problem, an embodiment of the present application provides a downlink PTRS transmission method, which is described in detail below with reference to the accompanying drawings.

Referring to fig. 2A, fig. 2A is a flowchart illustrating a downlink PTRS transmission method according to an embodiment of the present disclosure, where as shown in the figure, the method includes:

step 201, a network device determines physical resources occupied by each PTRS port in a plurality of PTRS ports, wherein the plurality of PTRS ports correspond to the same DMRS ports of a terminal;

step 202, the network device sends the PTRS on each PTRS port to the terminal on the physical resource occupied by each PTRS port.

Step 203, the terminal determines physical resources occupied by each PTRS port in a plurality of PTRS ports, wherein the plurality of PTRS ports correspond to the same DMRS port;

the sequence of step 203 and step 201 is not limited.

And the number of PTRS ports corresponding to the DMRS ports is indicated through configuration information. The configuration information may be indicated by DCI signaling or RRC signaling, for example.

Wherein the DMRS ports include a single DMRS port corresponding to the plurality of PTRS ports, each of the plurality of PTRS ports transmitting a same signal as the single DMRS port; alternatively, the DMRS ports include a plurality of DMRS ports, and the plurality of PTRS ports transmit the same signal as a DMRS port having a lowest port index among the plurality of DMRS ports. In a specific implementation, the terminal may receive scheduling information configured by a network device, where the scheduling information is used to schedule one or more DMRS ports in one CDM group, where the DMRS ports are included. Furthermore, in one implementation, the plurality of PTRS ports may only be associated with the lowest-indexed DMRS port of the plurality of DMRS ports, but in fact they implicitly associate all DMRS ports that are in the same CDM group as the DMRS port (i.e., may be used for channel estimation of these DMRS ports).

And 204, the terminal receives the PTRS on each PTRS port on the physical resource occupied by each PTRS port.

In a specific implementation, the PTRS on each PTRS port is used to determine a phase offset corresponding to each PTRS port, and the phase offset corresponding to each PTRS port is used to determine an effective channel estimation result on the DMRS port. The terminal determines the phase offset corresponding to each PTRS port according to the PTRS on each PTRS port, and then determines an effective channel estimation result on the DMRS port according to the phase offset corresponding to each PTRS port.

Optionally, the phase offset corresponding to each PTRS port is used to determine an effective phase offset for the DMRS; the effective phase offset is used to determine an effective channel estimation result on the DMRS port.

Optionally, the phase offset corresponding to each PTRS port is used to perform channel estimation on the DMRS port to obtain a plurality of reference channel estimation results; the plurality of reference channel estimation results are used for combining to obtain an effective channel estimation result on the DMRS port.

It can be seen that in this example, when different TRPs transmit data using the same DMRS port, different TRPs may transmit different PTRS ports simultaneously for phase tracking to obtain phase offsets of multiple TRPs, respectively. The accuracy of the DMRS channel estimation can be improved by performing the DMRS channel estimation for a plurality of TRPs based on the respective phase offsets.

Further, the phase offset corresponding to each PTRS port is also used for demodulating the PDSCH.

As can be seen, in this example, the terminal determines the phase offset corresponding to each PTRS port according to the PTRS on the multiple PTRS ports, and the phase offset can be used for demodulation of the PDSCH, so as to improve the detection performance of the PDSCH.

In one possible example, the physical resource occupied by each PTRS port is a subcarrier occupied by each PTRS port, the subcarrier occupied by each PTRS port is determined by a resource element RE offset adopted by each PTRS port, and different PTRS ports in the plurality of PTRS ports adopt different RE offsets.

In a specific implementation, the terminal may determine the RE offset used by each PTRS port first, and then determine the subcarrier occupied by each PTRS port according to the resource element RE offset used by each PTRS port.

For example, as shown in fig. 2B, assuming that DMRS port 0 is associated with two PTRS ports (PTRS port 0 and port 1), the RE offset of PTRS port 0 is 0, wherein the RE offset of PTRS port 1 is 1, the REs determined by the two PTRS ports according to the RE offsets in one PRB are: PTRS port 0 occupies the first subcarrier and PTRS port 1 occupies the second subcarrier.

As can be seen, in this example, the subcarrier occupied by each PTRS port is determined by the RE offset adopted by each PTRS port, and different RE offsets are adopted by different PTRS ports in the multiple PTRS ports, so that the multiple PTRS ports corresponding to the same DMRS port can be distinguished from physical resources, so that when different TRPs adopt the same DMRS port to transmit data, different TRPs can transmit different PTRS ports for phase tracking to respectively obtain the phase offsets of the multiple TRPs, channel estimation of the DMRS of the multiple TRPs is performed based on the respective phase offsets, and accuracy of DMRS channel estimation can be improved.

In this possible example, the RE offset employed by each of the plurality of PTRS ports is indicated by one RE offset indication information.

For example, the network device may indicate RE offsets of at most two PTRS ports associated with one DMRS port through RRC signaling resource element offset resourcelementoffset. As shown in table 2, when 2 PTRS ports are associated with a DMRS port, the indicated two RE offsets are used for the associated two PTRS ports, respectively.

TABLE 2 multiple PTRS RE offsets associated with different DMRS ports

As can be seen, in this example, a plurality of PTRS ports are indicated by a single RE offset indication information, so that the data amount is small, and the signaling resource is saved.

In this possible example, the RE offset respectively adopted by the plurality of PTRS ports is indicated by a plurality of RE offset indication information, each RE offset indication information is used for indicating the RE offset of one PTRS port.

The terminal determines RE offsets corresponding to the PTRS ports according to a plurality of RE offset indication information sent by the network equipment, wherein each RE offset indication information is used for indicating the RE offset of one PTRS port. Specifically, the existing RE offset indication method (as shown in table 1) may be reused, and two resourcelementoffsets are used to indicate that two RE offsets are used for two PTRS ports.

As can be seen, in this example, each PTRS port has 1 corresponding RE offset indication information for exclusive indication, and the method has strong correspondence, needs no secondary calculation for determination, and has a small calculation amount.

In this possible example, the RE offset adopted by the first PTRS port of the plurality of PTRS ports is indicated by one RE offset indication information; the RE offset employed by any one of the plurality of PTRS ports other than the first PTRS port is determined by the RE offset employed by the first PTRS port.

Wherein the one RE offset indication information may be implemented by existing RRC signaling resource element offset.

In a specific implementation, the terminal determines the RE offset adopted by a first PTRS port of the PTRS ports, and then determines the RE offsets of other PTRS ports according to the RE offset adopted by the first PTRS port.

In this possible example, the RE offset used by the any PTRS port is specifically determined by the RE offset used by the first PTRS port as follows:

the RE offset employed by a PTRS port with port index m is:

or,

or,

or,

wherein, K is a preset value,

an RE offset for a PTRS port with a port index of M, M being a non-negative integer less than M, M being a number of the plurality of PTRS ports.

As can be seen, in this example, the RE offset adopted by the first PTRS port is indicated by one RE offset indication information; the RE offset adopted by any PTRS port except the first PTRS port is determined through the RE offset adopted by the first PTRS port, so that the signaling resource is saved, and the determination efficiency of the subcarrier of the PTRS port is improved.

In one possible example, the physical resource occupied by each PTRS port is a PRB occupied by each PTRS port, the PRB occupied by each PTRS port is determined by the PRB occupied by each PTRS port, and different PRBs offsets are used for different PTRS ports in the plurality of PTRS ports.

In specific implementation, the terminal determines that the plurality of PTRS ports respectively adopt different PRB offsets, so as to determine the PRB occupied by each PTRS port.

For example, as shown in fig. 2C, assume that DMRS port 0 is associated with two PTRS ports (PTRS port 0 and port 1), where the frequency domain density of each PTRS port is K_PT-RSWhen the PRB offsets of PTRS port 0 are 0 (i.e. the starting PRB is PRB0) and the PRB offsets of PTRS port 1 are 2 (i.e. the starting PRB is PRB2), the transmission PRBs determined by the two PTRS ports according to different PRB offsets within the transmission bandwidth are: the PRB of the PTRS port 0 is PRB0, PRB4 and PRB8.. PRB4n, the PRB of the PTRS port 1 is PRB2, PRB6 and PRB10.. PRB4n +2, and n is a non-negative integer.

It can be seen that, in this example, the PRB occupied by each PTRS port is determined by the PRB offset adopted by each PTRS port, and different PRBs offsets are adopted by different PTRS ports in the multiple PTRS ports, so that the multiple PTRS ports corresponding to the same DMRS port can be distinguished from physical resources, when different TRPs adopt the same DMRS port to transmit data, different TRPs can transmit different PTRS ports for phase tracking to obtain phase offsets of the multiple TRPs, respectively, DMRS channel estimation of the multiple TRPs is performed based on the respective phase offsets, and accuracy of DMRS channel estimation can be improved.

In this possible example, the PRB offset adopted by the first PTRS port of the multiple PTRS ports is indicated by one piece of PRB offset indication information; the PRB offset adopted by any PTRS port except the first PTRS port in the plurality of PTRS ports is determined by the PRB offset adopted by the first PTRS port. Wherein the first PTRS port is a PTRS port with a lowest port index in the plurality of PTRS ports.

Wherein the one PRB offset indication information may be implemented by existing RRC signaling resource element offset.

In specific implementation, the terminal determines the PRB offset adopted by the first PTRS port of the multiple PTRS ports, and then determines the PRB offsets of other PTRS ports according to the PRB offset adopted by the first PTRS port.

In this possible example, the PRB offset adopted by any one PTRS port is specifically determined by the PRB offset adopted by the first PTRS port as follows:

the PRB offset adopted by a PTRS port with port index m is:

or,

wherein,

a PRB offset for a PTRS port with a port index of M, M being a non-negative integer less than M, M being the number of the plurality of PTRS ports, K_PT-RSThe frequency-domain density is the frequency-domain density of the PTRS port, the frequency-domain density is in PRB units, and the frequency-domain density is determined according to the transmission bandwidth of the DMRS port.

As can be seen, in this example, the PRB offset used by the first PTRS port is indicated by one piece of PRB offset indication information; the RE offset adopted by any PTRS port except the first PTRS port is determined by the PRB offset adopted by the first PTRS port, so that the signaling resource is saved, and the determination efficiency of the PRB of the PTRS port is improved.

In this possible example, the PRB offset employed by each of the PTRS ports is determined by a port index of each of the PTRS ports.

In this possible example, the correspondence between the port index and the PRB offset is pre-configured.

As can be seen, in this example, by using the pre-configured port index and the corresponding relationship between the PRB offsets, the PRB offsets used by each PTRS port can be quickly queried and confirmed, which is fast and efficient.

In this possible example, the PRB offset for a PTRS port of the plurality of PTRS ports with port index m is determined according to the following formula:

or,

wherein,

a PRB offset for a PTRS port with a port index of M, M being a non-negative integer less than M, M being the number of the plurality of PTRS ports, K_PT-RSIs the frequency domain density, n, of the PTRS port_RNTIIs radio network temporary identifier RNTI, N used for scheduling Cyclic Redundancy Check (CRC) scrambling of downlink control information DCI of DMRS (demodulation reference signals) port associated with PTRS (packet switched reference signal) port_RBThe number of PRBs is the bandwidth occupied by the DMRS port associated with the PTRS port.

As can be seen, in this example, the PRB offset adopted by each PTRS port is dynamically calculated through a formula, which is high in accuracy and adaptability.

In one possible example, the physical resource occupied by each PTRS port is an OFDM symbol occupied by each PTRS port, and different OFDM symbols are used for different PTRS ports of the plurality of PTRS ports.

In a specific implementation, a terminal may determine OFDM symbols occupied by a plurality of PTRS ports, and at this time, different TRPs may transmit different PTRS ports on different OFDM symbols and associate the same DMRS port, thereby supporting a diversity transmission mode of SDM.

It can be seen that, in this example, different PTRS ports in the multiple PTRS ports use different OFDM symbols, so that the multiple PTRS ports corresponding to the same DMRS port can be distinguished from physical resources, and thus when different TRPs use the same DMRS port to transmit data, different TRPs can transmit different PTRS ports for phase tracking to obtain phase offsets of the multiple TRPs, respectively, and channel estimation of DMRSs of the multiple TRPs is performed based on the respective phase offsets, so that accuracy of DMRS channel estimation can be improved.

In this possible example, the OFDM symbols occupied by each of the PTRS ports is determined by a port index of the PTRS port.

In this possible example, the OFDM symbol occupied by the PTRS port with port index m of the PTRS ports is:

l _m＝(l ₀+ m) mod L or

Wherein l_mAn OFDM symbol occupied by an M +1 th PTRS port, M being a non-negative integer less than M, M being the number of the plurality of PTRS ports, L_PT-RSThe time domain interval of the PTRS port is L is the number of OFDM symbols occupied by the PDSCH in one time slot or the number of OFDM symbols contained in one time slot, and the time domain interval is the OFDM symbol interval between adjacent OFDM symbols occupied by one PTRS port.

Wherein the time domain interval that can be used for the PTRS port is greater than 1, namely L_PT-RS>1。

For example, as shown in fig. 2D, it is assumed that DMRS port 0 is associated with two PTRS ports (PTRS port 0 and port 1), where PTRS port 0 occupies an OFDM index of l₀Determined according to MCS {3,5,7,9}, the OFDM index occupied by PTRS port 1 is l₁＝l ₀+1＝{4,6,8,10}。

As can be seen, in this example, the OFDM symbol occupied by each PTRS port is determined by the port index of the PTRS port, which is highly accurate.

Referring to fig. 3, in accordance with the embodiment shown in fig. 2A, fig. 3 is a schematic structural diagram of a terminal 300 according to an embodiment of the present application, and as shown in the figure, the terminal 300 includes a processor 310, a memory 320, a communication interface 330, and one or more programs 321, where the one or more programs 321 are stored in the memory 320 and configured to be executed by the processor 310, and the one or more programs 321 include instructions for performing the following operations.

Determining physical resources occupied by each PTRS port in a plurality of PTRS ports, wherein the plurality of PTRS ports correspond to the same DMRS port; and receiving the PTRS on each PTRS port on the physical resource occupied by each PTRS port.

It can be seen that, in the embodiment of the present application, the terminal determines a physical resource occupied by each PTRS port of the multiple PTRS ports, where the multiple PTRS ports correspond to the same DMRS port, and then, the terminal receives a PTRS on each PTRS port on the physical resource occupied by each PTRS port. Therefore, the method can realize that the same DMRS port is associated with a plurality of PTRS ports, thereby obtaining more accurate phase estimation.

In one possible example, the RE offset employed by each of the plurality of PTRS ports is indicated by one RE offset indication information.

In one possible example, the RE offsets respectively employed by the plurality of PTRS ports are indicated by a plurality of RE offset indication information, each RE offset indication information being used for indicating the RE offset of one PTRS port.

In one possible example, the RE offset employed by a first one of the plurality of PTRS ports is indicated by one RE offset indication information;

the RE offset employed by any one of the plurality of PTRS ports other than the first PTRS port is determined by the RE offset employed by the first PTRS port.

In one possible example, the RE offset used by the any one PTRS port is specifically determined by the RE offset used by the first PTRS port as follows:

the RE offset employed by a PTRS port with port index m is:

or,

wherein, K is a preset value,

In one possible example, the physical resources occupied by each of the PTRS ports are PRBs occupied by each of the PTRS ports, the PRBs occupied by each of the PTRS ports are determined by the PRBs occupied by each of the PTRS ports, and different ones of the PTRS ports employ different PRB offsets.

In one possible example, the PRB offset adopted by the first PTRS port of the plurality of PTRS ports is indicated by one piece of PRB offset indication information;

the PRB offset adopted by any PTRS port except the first PTRS port in the plurality of PTRS ports is determined by the PRB offset adopted by the first PTRS port.

In one possible example, the PRB offset adopted by the any one PTRS port is specifically determined by the PRB offset adopted by the first PTRS port as follows:

the PRB offset adopted by a PTRS port with port index m is:

or,

wherein,

In one possible example, the PRB offset employed by each of the PTRS ports is determined by a port index of each of the PTRS ports.

In one possible example, the correspondence of the port index and the PRB offset is pre-configured.

In one possible example, the PRB offset for a PTRS port of the plurality of PTRS ports with port index m is determined according to the following equation:

or,

wherein,

In one possible example, the OFDM symbols occupied by each of the PTRS ports is determined by a port index of the PTRS port.

In one possible example, the OFDM symbol occupied by a PTRS port with port index m of the plurality of PTRS ports is:

l _m＝(l ₀+ m) mod L or

Wherein l_mAn OFDM symbol occupied for an M +1 th PTRS port, M being a non-negative integer less than M, M being the number of the plurality of PTRS ports, L_PT-RSThe time domain interval of the PTRS port is L is the number of OFDM symbols occupied by the PDSCH in one time slot or the number of OFDM symbols contained in one time slot, and the time domain interval is the OFDM symbol interval between adjacent OFDM symbols occupied by one PTRS port.

In one possible example, the number of PTRS ports corresponding to the DMRS ports is indicated by configuration information.

In one possible example, the DMRS ports include a single DMRS port, the plurality of PTRS ports transmitting the same signal as the single DMRS port; or,

the DMRS ports include a plurality of DMRS ports that transmit the same signals as a DMRS port of the plurality of DMRS ports having a lowest port index.

In one possible example, the PTRS on each PTRS port is used to determine a phase offset corresponding to each PTRS port, and the phase offset corresponding to each PTRS port is used to determine a valid channel estimation result on the DMRS port.

In one possible example, the phase offset corresponding to each PTRS port is used to determine an effective phase offset for the DMRS; the effective phase offset is used to determine an effective channel estimation result on the DMRS port.

In one possible example, the phase offset corresponding to each PTRS port is used for performing channel estimation on the DMRS port to obtain a plurality of reference channel estimation results; the plurality of reference channel estimation results are used for combining to obtain an effective channel estimation result on the DMRS port.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a network device 400 according to an embodiment of the present disclosure, and as shown in the figure, the network device 400 includes a processor 410, a memory 420, a communication interface 430, and one or more programs 421, where the one or more programs 421 are stored in the memory 420 and configured to be executed by the processor 410, and the one or more programs 421 include instructions for performing the following operations.

Determining physical resources occupied by each PTRS port in a plurality of PTRS ports, wherein the plurality of PTRS ports correspond to the same demodulation reference signal (DMRS) port of a terminal; and sending the PTRS on each PTRS port to the terminal on the physical resource occupied by each PTRS port.

In one possible example, the RE offset employed by a first PTRS port of the plurality of PTRS ports is indicated by one RE offset indication information;

the RE offset employed by a PTRS port with port index m is:

or,

wherein, K is a preset value,

the PRB offset adopted by a PTRS port with port index m is:

or,

wherein,

a PRB offset for a PTRS port with a port index of M, M being a non-negative integer less than M, M being a number of the plurality of PTRS ports, K_PT-RSThe frequency-domain density is the frequency-domain density of the PTRS port, the frequency-domain density is in PRB units, and the frequency-domain density is determined according to the transmission bandwidth of the DMRS port.

or,

wherein,

In one possible example, the OFDM symbols occupied by the PTRS ports of the plurality of PTRS ports with port index m are:

l _m＝(l ₀+ m) mod L or

Wherein l_mAn OFDM symbol occupied by an M +1 th PTRS port, M being a non-negative integer less than M, M being the number of the PTRS ports, L_PT-RSThe time domain interval of the PTRS port is L is the number of OFDM symbols occupied by the PDSCH in one time slot or the number of OFDM symbols contained in one time slot, and the time domain interval is the OFDM symbol interval between adjacent OFDM symbols occupied by one PTRS port.

The above-mentioned scheme of the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It is understood that the terminal includes corresponding hardware structures and/or software modules for performing the respective functions in order to implement the above-described functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the terminal may be divided into the functional units according to the above method example, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated unit may be implemented in the form of hardware, or may be implemented in the form of a software program module. It should be noted that, in the embodiment of the present application, the division of the unit is schematic, and is only one logic function division, and when the actual implementation is realized, another division manner may be provided.

In the case of integrated units, fig. 5 shows a block diagram of a possible functional unit composition of the downlink PTRS transmission apparatus involved in the above-described embodiment. The downlink PTRS transmission apparatus 500 is applied to a terminal, and specifically includes: a processing unit 502 and a communication unit 503. Processing unit 502 is configured to control and manage actions of the terminal, e.g., processing unit 502 is configured to support the terminal to perform relevant processes for the techniques described herein. The communication unit 503 is used to support communication between the terminal and other devices. The terminal may further include a storage unit 501 for storing program codes and data of the terminal.

The Processing Unit 502 may be a Processor or a controller, such as a Central Processing Unit (CPU), a general-purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication unit 503 may be a communication interface, a transceiver, a transceiving circuit, etc., and the storage unit 501 may be a memory. When the processing unit 502 is a processor, the communication unit 503 is a communication interface, and the storage unit 501 is a memory, the terminal according to the embodiment of the present application may be the terminal shown in fig. 3.

In a specific implementation, the processing unit 502 is configured to perform any step performed by the terminal in the above method embodiment, and when performing data transmission such as sending, the communication unit 503 is optionally invoked to complete the corresponding operation. The details will be described below.

The processing unit 502 is configured to determine a physical resource occupied by each PTRS port in a plurality of PTRS ports, where the PTRS ports correspond to the same DMRS port; and receiving, by the communication unit, the PTRS on each PTRS port on the physical resource occupied by the PTRS port.

the RE offset employed by a PTRS port with port index m is:

or,

wherein, K is a preset value,

In one possible example, the PRB offset adopted by the first PTRS port of the plurality of PTRS ports is indicated by one PRB offset indication information;

the PRB offset adopted by a PTRS port with port index m is:

or,

wherein,

or,

wherein,

l _m＝(l ₀+ m) mod L or

In the case of integrated units, fig. 6 shows a block diagram of a possible functional unit composition of the downlink PTRS transmission apparatus involved in the above-described embodiment. The downlink PTRS transmission apparatus 600 is applied to a network device, and the network device includes: a processing unit 602 and a communication unit 603. Processing unit 602 is configured to control and manage actions of the network device, e.g., processing unit 502 is configured to support the network device to perform processes associated with the techniques described herein. The communication unit 603 is configured to support communication between the network device and other devices. The network device may also comprise a storage unit 601 for storing program codes and data of the terminal.

The Processing Unit 602 may be a Processor or a controller, such as a Central Processing Unit (CPU), a general-purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication unit 603 may be a communication interface, a transceiver, a transceiving circuit, etc., and the storage unit 601 may be a memory. When the processing unit 602 is a processor, the communication unit 603 is a communication interface, and the storage unit 601 is a memory, the terminal according to the embodiment of the present application may be a network device shown in fig. 4.

The processing unit 602 is configured to determine a physical resource occupied by each PTRS port in a plurality of PTRS ports, where the PTRS ports correspond to a same DMRS port of a terminal; and transmitting the PTRS on each PTRS port to the terminal on the physical resource occupied by each PTRS port through the communication unit.

the RE offset employed by a PTRS port with port index m is:

or,

wherein, K is a preset value,

In one possible example, the PRB offset adopted by any one PTRS port is specifically determined by the PRB offset adopted by the first PTRS port as follows:

the PRB offset adopted by a PTRS port with port index m is:

or the like, or a combination thereof,

wherein,

or,

wherein,

In one possible example, the physical resource occupied by each of the PTRS ports is an OFDM symbol occupied by the PTRS port, and different ones of the PTRS ports employ different OFDM symbols.

l _m＝(l ₀+ m) mod L or

It can be understood that, since the method embodiment and the apparatus embodiment are different presentation forms of the same technical concept, the content of the method embodiment portion in the present application should be synchronously adapted to the apparatus embodiment portion, and is not described herein again.

The embodiment of the present application further provides a chip, where the chip includes a processor, configured to call and run a computer program from a memory, so that a device in which the chip is installed performs some or all of the steps described in the terminal in the above method embodiment.

The embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform some or all of the steps described in the terminal in the above method embodiment.

The embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program causes a computer to perform some or all of the steps described in the above method embodiment for a network-side device.

The present application further provides a computer program product, where the computer program product includes a computer program operable to make a computer perform some or all of the steps described in the terminal in the above method embodiments. The computer program product may be a software installation package.

The steps of a method or algorithm described in the embodiments of the present application may be implemented in hardware, or may be implemented by a processor executing software instructions. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash Memory, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), registers, a hard disk, a removable disk, a compact disc Read Only Memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in an access network device, a target network device, or a core network device. Of course, the processor and the storage medium may reside as discrete components in an access network device, a target network device, or a core network device.

Those skilled in the art will appreciate that in one or more of the examples described above, the functionality described in the embodiments of the present application may be implemented, in whole or in part, by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions described in accordance with the embodiments of the application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy Disk, a hard Disk, a magnetic tape), an optical medium (e.g., a Digital Video Disc (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the embodiments of the present application in further detail, and it should be understood that the above-mentioned embodiments are only specific embodiments of the present application, and are not intended to limit the scope of the embodiments of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of the embodiments of the present application.

Claims

A transmission method of a downlink Phase Tracking Reference Signal (PTRS), comprising:

the terminal determines physical resources occupied by each PTRS port in a plurality of PTRS ports, wherein the plurality of PTRS ports correspond to the same demodulation reference signal (DMRS) port;

and the terminal receives the PTRS on each PTRS port on the physical resource occupied by each PTRS port.
The method of claim 1, wherein the physical resources occupied by each PTRS port are subcarriers occupied by each PTRS port, wherein the subcarriers occupied by each PTRS port are determined by Resource Element (RE) offsets employed by each PTRS port, and wherein different ones of the plurality of PTRS ports employ different RE offsets.
The method of claim 2, wherein the RE offset employed by each of the plurality of PTRS ports is indicated by one RE offset indication information; or,

the RE offsets respectively adopted by the plurality of PTRS ports are indicated by a plurality of RE offset indication information, and each RE offset indication information is used for indicating the RE offset of one PTRS port.
The method of claim 2, wherein the RE offset employed by a first one of the plurality of PTRS ports is indicated by one RE offset indication information;

the RE offset employed by any one of the plurality of PTRS ports other than the first PTRS port is determined by the RE offset employed by the first PTRS port.
The method of claim 4, wherein the RE offset employed by the any PTRS port is determined by the RE offset employed by the first PTRS port in a manner that is specifically as follows:

the RE offset employed by a PTRS port with port index m is:

or,

wherein, K is a preset value,
an RE offset for a PTRS port with a port index of M, M being a non-negative integer less than M, M being a number of the plurality of PTRS ports.
The method of claim 1, wherein the physical resources occupied by each PTRS port are PRBs occupied by each PTRS port, wherein the PRBs occupied by each PTRS port are determined by the PRBs occupied by each PTRS port, and wherein different PRB offsets are used for different PTRS ports of the plurality of PTRS ports.
The method according to claim 6, wherein the PRB offset employed by a first PTRS port of the plurality of PTRS ports is indicated by a PRB offset indication information;

the PRB offset adopted by any PTRS port except the first PTRS port in the plurality of PTRS ports is determined by the PRB offset adopted by the first PTRS port.
The method according to claim 7, wherein the PRB offset used by the any PTRS port is determined by the PRB offset used by the first PTRS port in the following manner:

the PRB offset adopted by a PTRS port with port index m is:

or,

wherein,
a PRB offset for a PTRS port with a port index of M, M being a non-negative integer less than M, M being the number of the plurality of PTRS ports, K_PT-RSIs a frequency-domain density of a PTRS port, the frequency-domain density being in PRB units and the frequency-domain density being determined according to a transmission bandwidth of the DMRS port.
The method of claim 6, wherein the PRB offset employed by each PTRS port is determined by a port index of the each PTRS port.
The method of claim 9, wherein the port index and the PRB offset are pre-configured in correspondence; or,

determining the PRB offset of a PTRS port with port index m in the plurality of PTRS ports according to the following formula:

or,

wherein,
a PRB offset for a PTRS port with a port index of M, M being a non-negative integer less than M, M being the number of the plurality of PTRS ports, K_PT-RSIs the frequency domain density, n, of the PTRS port_RNTIIs a wireless network temporary for carrying out Cyclic Redundancy Check (CRC) scrambling on Downlink Control Information (DCI) of a DMRS (demodulation reference signal) port associated with a scheduling PTRS (packet switched reference signal) portTime identity RNTI, N_RBThe number of PRBs is the bandwidth occupied by the DMRS port associated with the PTRS port.
The method of claim 1, wherein the physical resource occupied by each PTRS port is an OFDM symbol occupied by each PTRS port, and wherein different OFDM symbols are used for different PTRS ports of the plurality of PTRS ports.
The method of claim 11, wherein the OFDM symbols occupied by each PTRS port is determined by a port index of the PTRS port.
The method of claim 12, wherein the OFDM symbols occupied by the PTRS ports of the plurality of PTRS ports with port index m are:

l _m＝(l ₀+ m) mod L or

Wherein l_mAn OFDM symbol occupied by an M +1 th PTRS port, M being a non-negative integer less than M, M being the number of the plurality of PTRS ports, L_PT-RSThe time domain interval of the PTRS port is L is the number of OFDM symbols occupied by the PDSCH in one time slot or the number of OFDM symbols contained in one time slot, and the time domain interval is the OFDM symbol interval between adjacent OFDM symbols occupied by one PTRS port.
The method according to any of claims 1-13, wherein the number of PTRS ports corresponding to the DMRS ports is indicated by configuration information.
The method of claim 1, wherein the DMRS port comprises a single DMRS port, and wherein the plurality of PTRS ports transmit the same signal as the single DMRS port; or,

the DMRS ports include a plurality of DMRS ports that transmit the same signals as a DMRS port of the plurality of DMRS ports having a lowest port index.
The method of any one of claims 1 to 15, wherein the PTRS on each PTRS port is used to determine a phase offset corresponding to each PTRS port, and wherein the phase offset corresponding to each PTRS port is used to determine valid channel estimation results on the DMRS port.
The method of claim 16, wherein the phase offset corresponding to each PTRS port is used to determine an effective phase offset for the DMRS; the effective phase offset is used to determine an effective channel estimation result on the DMRS port; or,

the phase offset corresponding to each PTRS port is used for respectively carrying out channel estimation on the DMRS port to obtain a plurality of reference channel estimation results; the plurality of reference channel estimation results are used for combining to obtain an effective channel estimation result on the DMRS port.
A downlink PTRS transmission method is characterized by comprising the following steps:

the network equipment determines physical resources occupied by each PTRS port in a plurality of PTRS ports, wherein the plurality of PTRS ports correspond to the same demodulation reference signal (DMRS) port of a terminal;

and the network equipment sends the PTRS on each PTRS port to the terminal on the physical resource occupied by each PTRS port.
The method of claim 18, wherein the physical resources occupied by each PTRS port are subcarriers occupied by each PTRS port, wherein the subcarriers occupied by each PTRS port are determined by resource element RE offsets employed by each PTRS port, and wherein different PTRS ports of the plurality of PTRS ports employ different RE offsets.
The method of claim 19, wherein the RE offset employed by each of the plurality of PTRS ports is indicated by one RE offset indication information; or,

the RE offsets respectively adopted by the plurality of PTRS ports are indicated by a plurality of RE offset indication information, and each RE offset indication information is used for indicating the RE offset of one PTRS port.
The method of claim 19, wherein the RE offset employed by a first PTRS port of the plurality of PTRS ports is indicated by one RE offset indication information;

the RE offset employed by any one of the plurality of PTRS ports other than the first PTRS port is determined by the RE offset employed by the first PTRS port.
The method of claim 21, wherein the RE offset used by the any one PTRS port is determined by the RE offset used by the first PTRS port in the following manner:

the RE offset employed by a PTRS port with port index m is:

or,

wherein, K is a preset value,
an RE offset for a PTRS port with a port index of M, M being a non-negative integer less than M, M being a number of the plurality of PTRS ports.
The method of claim 18, wherein the physical resources occupied by each PTRS port are PRBs occupied by each PTRS port, and wherein the PRBs occupied by each PTRS port are determined by the PRBs occupied by each PTRS port, and wherein different PRBs offsets are used for different PTRS ports of the plurality of PTRS ports.
The method of claim 23, wherein the PRB offset used by a first PTRS port of the plurality of PTRS ports is indicated by one PRB offset indication information;

the PRB offset adopted by any PTRS port except the first PTRS port in the plurality of PTRS ports is determined by the PRB offset adopted by the first PTRS port.
The method according to claim 24, wherein the PRB offset used by the any PTRS port is determined by the PRB offset used by the first PTRS port in the following manner:

the PRB offset adopted by a PTRS port with port index m is:

or,

wherein,
a PRB offset for a PTRS port with a port index of M, M being a non-negative integer less than M, M being a number of the plurality of PTRS ports, K_PT-RSThe frequency-domain density is the frequency-domain density of the PTRS port, the frequency-domain density is in PRB units, and the frequency-domain density is determined according to the transmission bandwidth of the DMRS port.
The method of claim 23, wherein the PRB offset used for each PTRS port is determined by a port index of the PTRS port.
The method of claim 26, wherein the port index and the PRB offset are pre-configured in correspondence; or,

determining the PRB offset of a PTRS port with port index m in the plurality of PTRS ports according to the following formula:

or,

wherein,
a PRB offset for a PTRS port with a port index of M, M being a non-negative integer less than M, M being the number of the plurality of PTRS ports, K_PT-RSIs the frequency domain density, n, of the PTRS port_RNTIIs radio network temporary identifier RNTI, N used for scheduling Cyclic Redundancy Check (CRC) scrambling of downlink control information DCI of DMRS (demodulation reference signals) port associated with PTRS (packet switched reference signal) port_RBThe number of PRBs is the bandwidth occupied by the DMRS port associated with the PTRS port.
The method of claim 18, wherein the physical resource occupied by each PTRS port is an OFDM symbol occupied by each PTRS port, and wherein different OFDM symbols are used for different PTRS ports of the plurality of PTRS ports.
The method of claim 28, wherein the OFDM symbols occupied by each PTRS port is determined by a port index of the PTRS port.
The method of claim 29, wherein the OFDM symbols occupied by the PTRS ports with port index m of the plurality of PTRS ports are:

l _m＝(l ₀+ m) mod L or

Wherein l_mAn OFDM symbol occupied for an M +1 th PTRS port, M being a non-negative integer less than M, M being the number of the plurality of PTRS ports, L_PT-RSThe time domain interval of the PTRS port is L is the number of OFDM symbols occupied by the PDSCH in one time slot or the number of OFDM symbols contained in one time slot, and the time domain interval is the OFDM symbol interval between adjacent OFDM symbols occupied by one PTRS port.
The method according to any of claims 18-30, wherein the number of PTRS ports to which the DMRS ports correspond is indicated by configuration information.
The method of claim 18, wherein the DMRS port comprises a single DMRS port, wherein the plurality of PTRS ports transmit the same signal as the single DMRS port; or,

the DMRS ports include a plurality of DMRS ports that transmit the same signals as a DMRS port of the plurality of DMRS ports having a lowest port index.
The method of any one of claims 18 to 32, wherein the PTRS on each PTRS port is used to determine a phase offset corresponding to each PTRS port, and wherein the phase offset corresponding to each PTRS port is used to determine valid channel estimation results on the DMRS port.
The method of claim 33, wherein the phase offset corresponding to each PTRS port is used to determine an effective phase offset for the DMRS; the effective phase offset is used to determine an effective channel estimation result on the DMRS port; or,

the phase offset corresponding to each PTRS port is used for respectively carrying out channel estimation on the DMRS port to obtain a plurality of reference channel estimation results; the plurality of reference channel estimation results are used for combining to obtain an effective channel estimation result on the DMRS port.
A downlink PTRS transmission device is applied to a terminal and comprises a processing unit and a communication unit, wherein,

the processing unit is used for determining physical resources occupied by each PTRS port in a plurality of PTRS ports, wherein the plurality of PTRS ports correspond to the same DMRS port; and receiving, by the communication unit, the PTRS on each PTRS port on the physical resource occupied by the PTRS port.
The apparatus of claim 35, wherein the physical resources occupied by each PTRS port are subcarriers occupied by each PTRS port determined by a resource element RE offset employed by each PTRS port, and wherein different PTRS ports of the plurality of PTRS ports employ different RE offsets.
The apparatus of claim 36, wherein the RE offsets employed by the PTRS ports are indicated by RE offset indication information; or,

the RE offsets respectively adopted by the plurality of PTRS ports are indicated by a plurality of RE offset indication information, and each RE offset indication information is used for indicating the RE offset of one PTRS port.
The apparatus of claim 36, wherein an RE offset employed by a first PTRS port of the plurality of PTRS ports is indicated by one RE offset indication information;

the RE offset employed by any one of the plurality of PTRS ports other than the first PTRS port is determined by the RE offset employed by the first PTRS port.
The apparatus as claimed in claim 38, wherein the RE offset employed by the any PTRS port is determined by the RE offset employed by the first PTRS port in a manner as follows:

the RE offset employed by a PTRS port with port index m is:

or,

wherein, K is a preset value,
an RE offset for a PTRS port with a port index of M, M being a non-negative integer less than M, M being a number of the plurality of PTRS ports.
The apparatus of claim 35, wherein the physical resources occupied by each PTRS port are PRBs occupied by each PTRS port, wherein the PRBs occupied by each PTRS port are determined by the PRBs occupied by each PTRS port, and wherein different PRB offsets are used for different PTRS ports of the plurality of PTRS ports.
The apparatus of claim 40, wherein the PRB offset employed by a first PTRS port of the plurality of PTRS ports is indicated by a PRB offset indication information;

the PRB offset adopted by any PTRS port except the first PTRS port in the plurality of PTRS ports is determined by the PRB offset adopted by the first PTRS port.
The apparatus of claim 41, wherein the PRB offset employed by the any PTRS port is determined by the PRB offset employed by the first PTRS port in a manner that is specifically as follows:

the PRB offset adopted by the PTRS port with port index m is:

or,

wherein,
a PRB offset for a PTRS port with a port index of M, M being a non-negative integer less than M, M being the number of the plurality of PTRS ports, K_PT-RSThe frequency-domain density is the frequency-domain density of the PTRS port, the frequency-domain density is in PRB units, and the frequency-domain density is determined according to the transmission bandwidth of the DMRS port.
The apparatus of claim 40, wherein the PRB offset employed by each PTRS port is determined by a port index of the each PTRS port.
The apparatus of claim 43, wherein the port index and the PRB offset are pre-configured in correspondence; or,

the PRB offset of a PTRS port with a port index of m in the plurality of PTRS ports is determined according to the following formula:

or,

wherein,
a PRB offset for a PTRS port with a port index of M, M being a non-negative integer less than M, M being the number of the plurality of PTRS ports, K_PT-RSIs the frequency domain density, n, of the PTRS port_RNTIIs radio network temporary identifier RNTI, N used for scheduling Cyclic Redundancy Check (CRC) scrambling of downlink control information DCI of DMRS (demodulation reference signals) port associated with PTRS (packet switched reference signal) port_RBThe number of PRBs is the bandwidth occupied by the DMRS port associated with the PTRS port.
The apparatus of claim 35, wherein the physical resources occupied by each PTRS port are OFDM symbols occupied by each PTRS port, and wherein different OFDM symbols are used for different PTRS ports of the plurality of PTRS ports.
The apparatus of claim 45, wherein the OFDM symbols occupied by each PTRS port is determined by a port index of the PTRS port.
The apparatus of claim 46, wherein a PTRS port of the plurality of PTRS ports with a port index of m occupies an OFDM symbol of:

l _m＝(l ₀+ m) mod L or

Wherein l_mAn OFDM symbol occupied by an M +1 th PTRS port, M being a non-negative integer less than M, M being the number of the plurality of PTRS ports, L_PT-RSThe time domain interval of the PTRS port is L is the number of OFDM symbols occupied by the PDSCH in one time slot or the number of OFDM symbols contained in one time slot, and the time domain interval is the OFDM symbol interval between adjacent OFDM symbols occupied by one PTRS port.
The apparatus of any one of claims 35-47, wherein the number of PTRS ports to which the DMRS ports correspond is indicated by configuration information.
The apparatus of claim 35, wherein the DMRS port comprises a single DMRS port, wherein the plurality of PTRS ports transmit the same signal as the single DMRS port; or,

the DMRS ports include a plurality of DMRS ports that transmit the same signals as a DMRS port of the plurality of DMRS ports having a lowest port index.
The apparatus of any one of claims 35-49, wherein the PTRS on each of the PTRS ports is configured to determine a phase offset for each of the PTRS ports, and wherein the phase offset for each of the PTRS ports is configured to determine valid channel estimation results on the DMRS port.
The apparatus of claim 50, wherein the phase offset corresponding to each PTRS port is used to determine an effective phase offset for the DMRS; the effective phase offset is used to determine an effective channel estimation result on the DMRS port; or,

the phase offset corresponding to each PTRS port is used for respectively carrying out channel estimation on the DMRS port to obtain a plurality of reference channel estimation results; the plurality of reference channel estimation results are used for combining to obtain an effective channel estimation result on the DMRS port.
A downlink PTRS transmission device is applied to network equipment and comprises a processing unit and a communication unit, wherein,

the processing unit is used for determining physical resources occupied by each PTRS port in a plurality of PTRS ports, wherein the plurality of PTRS ports correspond to the same DMRS port of the terminal; and transmitting the PTRS on each PTRS port to the terminal on the physical resource occupied by each PTRS port through the communication unit.
The apparatus of claim 52, wherein the physical resources occupied by each PTRS port are subcarriers occupied by each PTRS port, wherein the subcarriers occupied by each PTRS port are determined by a Resource Element (RE) offset employed by each PTRS port, and wherein different ones of the plurality of PTRS ports employ different RE offsets.
The apparatus as claimed in claim 53, wherein the RE offset employed by each of the plurality of PTRS ports is indicated by an RE offset indication information; or,

the RE offsets respectively adopted by the plurality of PTRS ports are indicated by a plurality of RE offset indication information, and each RE offset indication information is used for indicating the RE offset of one PTRS port.
The apparatus as claimed in claim 53, wherein the RE offset employed by a first PTRS port of the plurality of PTRS ports is indicated by an RE offset indication information;

the RE offset employed by any one of the plurality of PTRS ports other than the first PTRS port is determined by the RE offset employed by the first PTRS port.
The apparatus as claimed in claim 55, wherein the RE offset employed by the any one PTRS port is determined by the RE offset employed by the first PTRS port in particular as follows:

the RE offset employed by a PTRS port with port index m is:

or,

wherein, K is a preset value,
an RE offset for a PTRS port with a port index of M, M being a non-negative integer less than M, M being a number of the plurality of PTRS ports.
The apparatus of claim 52, wherein the physical resources occupied by each PTRS port are PRBs occupied by each PTRS port, wherein the PRBs occupied by each PTRS port are determined by the PRBs occupied by each PTRS port, and wherein different PRB offsets are used for different PTRS ports of the plurality of PTRS ports.
The apparatus according to claim 57, wherein the PRB offset employed by a first PTRS port of the plurality of PTRS ports is indicated by a PRB offset indication information;

the PRB offset adopted by any PTRS port except the first PTRS port in the plurality of PTRS ports is determined by the PRB offset adopted by the first PTRS port.
The apparatus of claim 58, wherein the PRB offset employed by the any one PTRS port is determined from the PRB offset employed by the first PTRS port in a manner that is specifically as follows:

the PRB offset adopted by a PTRS port with port index m is:

or,

wherein,
a PRB offset for a PTRS port with a port index of M, M being a non-negative integer less than M, M being the number of the plurality of PTRS ports, K_PT-RSThe frequency-domain density is the frequency-domain density of the PTRS port, the frequency-domain density is in PRB units, and the frequency-domain density is determined according to the transmission bandwidth of the DMRS port.
The apparatus of claim 57, wherein the PRB offset employed by each PTRS port is determined by a port index of the each PTRS port.
The apparatus of claim 60, wherein the port index and the PRB offset are pre-configured in correspondence; or,

the PRB offset of a PTRS port with a port index of m in the plurality of PTRS ports is determined according to the following formula:

or,

wherein,
a PRB offset for a PTRS port with a port index of M, M being a non-negative integer less than M, M being the number of the plurality of PTRS ports, K_PT-RSIs the frequency domain density, n, of the PTRS port_RNTIIs a radio network temporary identifier RNTI, N used for scheduling the Cyclic Redundancy Check (CRC) scrambling of downlink control information DCI of a DMRS port associated with a PTRS port_RBThe number of PRBs is the bandwidth occupied by the DMRS port associated with the PTRS port.
The apparatus of claim 52, wherein the physical resources occupied by each PTRS port are OFDM symbols occupied by the each PTRS port, and wherein different OFDM symbols are employed by different ones of the plurality of PTRS ports.
The apparatus of claim 62, wherein the OFDM symbol occupied by each PTRS port is determined by a port index of the PTRS port.
The apparatus of claim 63, wherein a PTRS port of the plurality of PTRS ports with a port index of m occupies an OFDM symbol that is:

l _m＝(l ₀+ m) mod L or

Wherein l_mFor OFDM symbols occupied by the M +1 th PTRS port, M is a non-negative integer less than MNumber, M is the number of the plurality of PTRS ports, L_PT-RSAnd L is the time domain interval of the PTRS port, the number of OFDM symbols occupied by the PDSCH in a time slot or the number of OFDM symbols contained in the time slot, and the time domain interval is the OFDM symbol interval between adjacent OFDM symbols occupied by the PTRS port.
The apparatus of any one of claims 52-64, wherein the number of PTRS ports to which the DMRS ports correspond is indicated by configuration information.
The apparatus of claim 52, wherein the DMRS port comprises a single DMRS port, and wherein the plurality of PTRS ports transmit the same signal as the single DMRS port; or,

the DMRS ports include a plurality of DMRS ports that transmit the same signals as a DMRS port of the plurality of DMRS ports having a lowest port index.
The apparatus of any one of claims 52 to 66, wherein the PTRS on each of the PTRS ports is configured to determine a phase offset for each of the PTRS ports, and wherein the phase offset for each of the PTRS ports is configured to determine valid channel estimation results on the DMRS port.
The apparatus of claim 67, wherein the corresponding phase offset for each PTRS port is used to determine an effective phase offset for the DMRS; the effective phase offset is used to determine an effective channel estimation result on the DMRS port; or the phase offset corresponding to each PTRS port is used for respectively performing channel estimation on the DMRS ports to obtain a plurality of reference channel estimation results; the plurality of reference channel estimation results are used for combining to obtain an effective channel estimation result on the DMRS port.
A terminal comprising a processor, memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs including instructions for performing the steps in the method of any of claims 1-17.
A network device comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs including instructions for performing the steps in the method of any of claims 18-34.
A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any of claims 1-17 or 18-34.
A computer-readable storage medium, characterized in that it stores a computer program for electronic data exchange, wherein the computer program causes a computer to perform the method according to any one of claims 1-17 or 18-34.
A computer program for causing a computer to perform the method of any one of claims 1-17 or 18-34.