CN117796096A

CN117796096A - Configuration method, device, equipment and medium of demodulation reference signal (DMRS)

Info

Publication number: CN117796096A
Application number: CN202280002735.0A
Authority: CN
Inventors: 高雪媛
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2024-03-29
Also published as: WO2024020963A1

Abstract

The application discloses a configuration method, device, equipment and medium of a demodulation reference signal (DMRS), and relates to the field of wireless communication. The method is applied to the terminal, and comprises the following steps: receiving configuration information of a demodulation reference signal (DMRS) of an uplink shared channel (PUSCH) sent by access network equipment; under the transmission configuration that the DCI scheduling terminal performs uplink simultaneous transmission STxMP based on two antenna panels through a plurality of downlink control information, the configuration information of the DMRS is used to instruct the terminal to respectively send DMRS corresponding to PUSCH through the two antenna panels according to the configuration information. According to the method, the DMRS corresponding to the PUSCHs sent by the two panels can be respectively configured when the multi-DCI schedules the multi-panel uplink to be transmitted simultaneously.

Description

Configuration method, device, equipment and medium of demodulation reference signal (DMRS)

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a method, an apparatus, a device, and a medium for configuring a demodulation reference signal DMRS.

Background

In 3GPP (3 rd Generation Partnership Project, third generation partnership project) R18 (Release 18) uplink MIMO (Multiple Input Multiple Output ) enhancement, simultaneous uplink transmission for multiple TRP (transmission/reception Point) is considered to be implemented by multiple panels (antenna panels) of a terminal, for further improving throughput and transmission reliability of uplink transmission.

For M-DCI (Multi-Downlink Control Information ) based scheduling Multi-panel uplink simultaneous transmission (Simultaneous transmission via Multi-panel) in R18, when a terminal transmits different PUSCHs (Physical Uplink Shared Channel, physical uplink shared channels) of time domain fully/partially overlapping (fully or partially overlapping) and frequency domain fully/partially/non-overlapping (fully or partially or non-overlapping) from different panels, an interference occurs between DMRS of one PUSCH and DMRS (Demodulation Reference Signal ) of another PUSCH.

Disclosure of Invention

The embodiment of the application provides a method, a device, equipment and a medium for configuring demodulation reference signal (DMRS), wherein the DMRS corresponding to PUSCHs sent by two panels can be respectively configured when multiple DCI schedules multiple panels to uplink and simultaneously transmit. The technical scheme is as follows:

according to one aspect of the present application, there is provided a method for configuring a demodulation reference signal DMRS, applied to a terminal, the method including:

receiving configuration information of a demodulation reference signal (DMRS) of an uplink shared channel (PUSCH) sent by access network equipment;

under a transmission configuration that a plurality of downlink control information DCI scheduling terminals perform uplink simultaneous transmission STxMP based on at most two antenna panels, the configuration information of the DMRS is used to instruct the terminals to respectively send DMRS corresponding to PUSCH through the at most two antenna panels according to the configuration information.

According to an aspect of the present application, there is provided a method for configuring a demodulation reference signal DMRS, applied to an access network device, where the method includes:

transmitting configuration information of a demodulation reference signal (DMRS) of an uplink shared channel (PUSCH) to a terminal;

According to an aspect of the present application, there is provided a configuration apparatus for demodulation reference signal DMRS, the apparatus including:

a sending module, configured to send configuration information of a demodulation reference signal DMRS of an uplink shared channel PUSCH to a terminal;

under a transmission configuration that a plurality of Downlink Control Information (DCI) scheduling terminals perform uplink simultaneous transmission (STxMP) based on two antenna panels, the configuration information of the DMRS is used for indicating the terminals to respectively send the DMRS corresponding to the PUSCH through the two antenna panels according to the configuration information.

A transmitting module, configured to transmit configuration information of maximum transmit power to a terminal, where the configuration information of maximum transmit power is used to determine maximum transmit power P of a panel corresponding to uplink transmission respectively from two antenna panels by the terminal when uplink transmission STxMP of a multi-antenna panel is scheduled by multiple downlink control information DCI _CMAX,P ；

The terminal comprises a plurality of antenna panels, and supports uplink simultaneous transmission of the plurality of antenna panels.

According to one aspect of the present application, there is provided a terminal comprising: a processor and a transceiver coupled to the processor; wherein,

the transceiver is configured to receive configuration information of a demodulation reference signal DMRS of an uplink shared channel PUSCH sent by the access network device;

According to one aspect of the present application, there is provided a network device comprising: a processor and a transceiver coupled to the processor; wherein,

The transceiver is configured to send configuration information of a demodulation reference signal DMRS of an uplink shared channel PUSCH to a terminal;

According to an aspect of the present application, there is provided a computer readable storage medium having stored therein executable instructions loaded and executed by a processor to implement the method for configuring demodulation reference signal DMRS as described in the above aspect.

According to an aspect of the embodiments of the present application, there is provided a chip, where the chip includes programmable logic circuits and/or program instructions, and when the chip is run on a computer device, the chip is configured to implement the method for configuring the demodulation reference signal DMRS in the above aspect.

According to an aspect of the present application, there is provided a computer program product, which when run on a processor of a computer device, causes the computer device to perform the method of configuring a demodulation reference signal DMRS as described in the above aspect.

The technical scheme provided by the embodiment of the application at least comprises the following beneficial effects:

the access network equipment configures configuration information of the DMRS of the PUSCH for the terminal equipment, when the access network equipment simultaneously transmits the PUSCH through two panels of a plurality of DCI scheduling terminal equipment, the terminal equipment respectively transmits the DMRS of the PUSCH from the two panels according to the configuration information of the DMRS, so that the two DMRS transmitted by the two panels are respectively configured, the access network equipment can avoid interference between the two DMRS by respectively configuring the two DMRS on different time-frequency resources or code domains, and the performance of the access network equipment for receiving the DMRS and carrying out channel estimation according to the DMRS is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a system architecture provided by an exemplary embodiment of the present application;

fig. 2 is a schematic diagram of single DCI scheduling provided in one exemplary embodiment of the present application;

Fig. 3 is a schematic diagram of multi-DCI scheduling provided in one exemplary embodiment of the present application;

fig. 4 is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of the present application;

fig. 5 is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of the present application;

fig. 6 is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of the present application;

fig. 7 is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of the present application;

fig. 8 is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of the present application;

fig. 9 is a schematic diagram of a method for configuring DMRS according to an exemplary embodiment of the present application;

fig. 10 is a schematic diagram of a method for configuring DMRS according to an exemplary embodiment of the present application;

fig. 11 is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of the present application;

fig. 12 is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of the present application;

fig. 13 is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of the present application;

fig. 14 is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of the present application;

fig. 15 is a flowchart of a method for configuring DMRS according to an exemplary embodiment of the present application;

Fig. 16 is a schematic diagram of a method for configuring DMRS according to an exemplary embodiment of the present application;

fig. 17 is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of the present application;

fig. 18 is a flowchart of a method for configuring DMRS provided in an exemplary embodiment of the present application;

fig. 19 is a flowchart of a method for configuring DMRS provided in an exemplary embodiment of the present application;

fig. 20 is a flowchart of a method for configuring DMRS provided in an exemplary embodiment of the present application;

fig. 21 is a block diagram of a configuration apparatus of a DMRS provided in an exemplary embodiment of the present application;

fig. 22 is a block diagram of a configuration apparatus of a DMRS provided in an exemplary embodiment of the present application;

fig. 23 is a schematic structural diagram of a communication device according to an exemplary embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.

Referring to fig. 1, the technical solution provided in the embodiment of the present application is applied to a communication system, where the system includes a network device 11 and a terminal 10.

The network device 11 is a device that provides a wireless communication function for the terminal. The network device may also be referred to as an access network device, for example. The network devices 11 include, but are not limited to: gN B in 5G, radio network controller (Radio Network Controller, RNC), node B (Node B, NB), base station controller (Base Station Controller, BSC), base transceiver station (Base Transceiver Station, BTS), home base station (e.g., home evolved NodeB, or HomeNode B, HNB), baseBand Unit (BBU), transmission point (transmission and ReceivingPoint, TRP), transmission point (Transmitting Point, TP), mobile switching center, and so forth. The network device in the present application may also be a device that provides a wireless communication function for the terminal in other communication systems that may occur in the future. As communication technology evolves, the name "network device" may change. For convenience of description, in the embodiments of the present application, the above-mentioned devices for providing the wireless communication function for the terminal 10 are collectively referred to as a network device.

TRP in embodiments of the present application may refer to any component (or collection of components) for providing wireless Access to a network, such as a macrocell, femtocell, wi-Fi Access Point (AP), or other wireless communication enabled device. TRP may provide wireless access according to one or more wireless communication protocols, such as generation 5 new radio (5 ^th Generation New Radio,5 GNR), long term evolution (Longoing Term Evolution, LTE), LTE advanced (LTE-a), high speed packet access (High Speed Packet Access, HSPA), wi-fi 802.11a/b/g/n/ac, etc.

Illustratively, one access network device is deployed with one or more TRPs, e.g., the access network device has corresponding first and second TRPs. Alternatively, the first access network device corresponds to a first TRP, and the second access network device corresponds to a second TRP.

The terminal 10 is a device that may provide voice and/or data connectivity to a user. For example, the terminal includes a handheld device, an in-vehicle device, and the like having a wireless communication function. Currently, the terminal may be: a Mobile phone, a tablet, a notebook, a palm, a Mobile internet device (Mobile Internet Device, MID), a wearable device, a Virtual Reality (VR) device, an augmented Reality (Augmented Reality, AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned (self-driving), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), or a wireless terminal in smart home (smart home), a vehicle device, a computing device, or other processing device connected to a wireless modem, and various forms of User Equipment (UE), a Mobile Station (MS), and the like.

It should be noted that the above system architecture is merely an example of a system architecture applicable to the embodiments of the present application, and the system architecture applicable to the embodiments of the present application may further add other entities or reduce some entities compared to the system architecture shown in fig. 1.

Optionally, the terminal has multiple panels, and the terminal supports simultaneous transmissions on the multiple panels. Multiple panels can perform uplink transmission or downlink transmission at the same time. For example, the terminal has two panels that transmit uplink channels/uplink signals to two TRPs, respectively. Generally, the directions of the multiple panels are greatly different, so that uplink spatial relationship information spacialrelation info or TCI state (TCI state) corresponding to uplink PUSCH transmission of the multiple panels is different.

Illustratively, one network device 11 is deployed with one or more TRPs, e.g., the network device 11 corresponds to TRP1, TRP2. The terminal uses different panel to send beam terminals in different directions and uses different sending beams to face different TRPs to repeat transmission of uplink channels, and the network device 11 receives the repeated transmission of the uplink channels sent by the terminal through a plurality of TRPs. For example, since the relative orientations of different TRPs and terminals are different, the terminals need to transmit beams in different beam directions to TRPs in corresponding directions by using the transmit beams, and repeat transmission of uplink channels.

The technical solution of the embodiment of the present disclosure may be applied to various communication systems, for example: global system for mobile communications (Global System of Mobile Communication, GSM), code division multiple access (Code Division Multiple Access, CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, general packet Radio service (General Packet Radio Service, GPRS), long term evolution (Long Term Evolution, LTE) system, LTE frequency division duplex (Frequency Division Duplex, FDD) system, LTE time division duplex (Time Division Duplex, TDD) system, long term evolution advanced (Advanced long Term Evolution, LTE-a) system, new Radio (NR) system, evolution system of NR system, LTE (LTE-based access to Unlicensed spectrum, LTE-U) system on unlicensed frequency band, NR-U system, universal mobile telecommunication system (Universal Mobile Telecommunication System, UMTS), worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wiMAX) communication system, wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, wiFi), next generation communication system or other communication system, etc.

Related terms referred to in this application are described below:

multi-TRP transmission:

in order to improve coverage at the cell edge, providing a more balanced quality of service within the service area, coordinated multipoint remains an important technical approach in NR systems. From the network morphology perspective, network deployment in a manner of centralized processing of a large number of distributed access points and base bands is more beneficial to providing balanced user experience rates, and significantly reduces time delay and signaling overhead caused by handover. With the rise of frequency bands, relatively dense access point deployment is also required from the viewpoint of ensuring network coverage. In the high frequency band, as the integration level of the active antenna device increases, the modularized active antenna array is more preferred. The antenna array of each TRP can be divided into a plurality of relatively independent antenna panels, so that the form and the port number of the whole array surface can be flexibly adjusted according to deployment scenes and service requirements. And the antenna panels or TRPs can be connected by optical fibers, so that more flexible distributed deployment can be performed. In the millimeter wave band, the blocking effect generated by obstacles such as human bodies or vehicles is more remarkable along with the reduction of the wavelength. In this case, from the viewpoint of securing link connection robustness, transmission/reception may be performed from a plurality of beams at a plurality of angles by using cooperation between a plurality of TRPs or antenna panels, thereby reducing adverse effects caused by blocking effects.

The coordinated multi-point transmission technique can be classified into two kinds of coherent and incoherent transmission according to the mapping relation of the transmission signal stream to the plurality of TRP/panels. Wherein, each data layer is mapped onto multiple TRP/antenna panels by weight vectors during coherent transmission. Whereas in non-coherent transmission, each data stream is mapped onto only part of the TRP/antenna panel. Coherent transmission has higher requirements for synchronization between transmission points and transmission capability of backhaul links, and is thus sensitive to many non-ideal factors in realistic deployment conditions. In contrast, incoherent transmission is less affected by the above factors and is therefore an important consideration for multipoint transmission techniques.

In NR R15, research and standardization work for M-TRP (Multi-TRP) has not been fully developed, R16 is mainly standardized for PDSCH (Physical Downlink Shared Channel ), R17 is standardized for PUSCH/PUCCH (Physical UplinkControl Channel ) and MTRP is enhanced, but only TDM (Time Division Multiplexing ) transmission scheme is standardized, and at present, R18 is considered for PUSCH/PUCCH to be enhanced based on simultaneous transmission of MTRP by a Multi-panel terminal.

QCL (Quasi Co-Location, quasi Co-located):

quasi co-location (QCL) refers to the large scale parameters of a channel experienced by a symbol on one antenna port can be inferred from the channel experienced by a symbol on another antenna port. The large scale parameters may include delay spread, average delay, doppler spread, doppler shift, average gain, spatial reception parameters, etc.

The concept of QCL was introduced with the advent of coordinated multipoint transmission (Coordinated Multiple Point transmission, coMP) technology. Multiple sites involved in CoMP transmission may correspond to multiple geographically diverse sites or multiple sectors with differing antenna panel orientations. For example, when a terminal receives data from different stations, the spatial difference between the stations may cause a difference in large-scale channel parameters, such as doppler frequency offset, delay spread, etc., of the receiving links from the different stations. The large scale parameters of the channel directly affect the adjustment and optimization of the filter coefficients in channel estimation, and different channel estimation filter parameters should be used to adapt to the corresponding channel propagation characteristics corresponding to the signals sent by different stations.

Thus, although the difference in spatial location or angle between stations is transparent to the UE and CoMP operation itself, the effect of the spatial difference on the channel large scale parameters is an important factor to be considered when the UE performs channel estimation and reception detection. By QCL in the sense of certain large scale parameters for two antenna ports is meant that these large scale parameters for the two ports are identical. Alternatively, the terminal may consider two ports to originate from the same location (i.e., quasi co-located) whenever some large scale parameters of the two ports are consistent, regardless of their actual physical locations or whether there is a difference in the orientation of the corresponding antenna panels.

For some typical application scenarios, considering possible QCL relationships between various reference signals, from the viewpoint of simplifying signaling, NR classifies several channel large-scale parameters into the following 4 types, so that the system is convenient to configure/instruct according to different scenarios:

QCL-TypeA (type a): { Doppler shift, doppler spread, average delay, delay spread }.

The other large scale parameters are the same except for the spatial reception parameters.

For the frequency band below 6GHz, spatial reception parameters may not be required.

QCL-TypeB (type B): { Doppler shift, doppler spread }.

Only for the frequency band below 6 GHz.

QCL-TypeC (type C): { Doppler shift, average delay }.

QCL-TypeD (type D): { spatial reception parameters }.

Mainly aims at the frequency band above 6 GHz.

In R17, PUSCH (Physical Uplink Shared Channel ) transmission by a terminal TO TRP directions of a plurality of base stations is standardized, and cooperative transmission in a TDM (Time Division Multiplexing ) transmission mode is mainly standardized, so that the terminal transmits different repetition of the same information on PUSCH TO different TRPs of the base stations in a time sharing manner through different transmission timings (Transmission Occasion, TO) of a time domain.

For uplink transmission, different QCL relations are distinguished, and the beam direction information of the reference signal or the uplink channel is represented by using spatial relation information or TCI state.

For uplink transmission, PUSCH channels facing different TRPs may have different spatial characteristics of channels actually passing through, so spatial association relationships or TCI states of PUSCHs in different transmission directions are considered to be different.

In R18, it is desirable to implement simultaneous cooperative transmission in TRP directions of multiple base stations through multiple antenna panels (panels) of a terminal, so as to increase reliability and throughput of transmission while effectively reducing transmission delay under multiple TRPs, but this scheme requires the terminal to have the capability of simultaneously transmitting multiple beams. The PUSCH transmission may be a multi-panel/TRP transmission based on single PDCCH (Physical Downlink Control Channel ) scheduling, i.e., a multi-panel/TRP transmission based on S-DCI (single DCI) scheduling. For example, as shown in fig. 2, the terminal 10 receives PDCCH1 transmitted by TRP1, wherein DCI1 is carried in PDCCH1, and the DCI1 includes scheduling information of PUSCH1 and PUSCH2. The terminal transmits PUSCH1 to TRP1 through panel1 according to DCI1, and transmits PUSCH2 to TRP2 through panel2 according to DCI 1. The PUSCH transmission may be a multi-pattern/TRP transmission scheduled based on different PDCCHs, i.e., M-DCI (Multi DCI), for example, as shown in fig. 3, the terminal 10 receives PDCCH1 transmitted by TRP1 and receives PDCCH2 transmitted by TRP 2. The PDCCH1 carries DCI1, and the DCI1 includes scheduling information of PUSCH 1. The PDCCH2 carries DCI2, and the DCI2 includes scheduling information of PUSCH2. The terminal transmits PUSCH1 to TRP1 through panel1 according to DCI1, and transmits PUSCH2 to TRP2 through panel2 according to DCI 2.

In practical deployment, the link between the panel and the TRP may be a relatively ideal backhaul link supporting high throughput and very low backhaul delay, or may be a Non-ideal backhaul link using xDSL (x Digital Subscriber Line ), microwave, relay, etc., and the NC-JT (Non-CoherentJoint Transmission ) transmission scheme based on M-DCI is mainly introduced for the Non-ideal backhaul case initially, but may also be used for the ideal backhaul case.

DMRS：

DMRS or DM-RS (Demodulation Reference Signal ) for channel estimation and coherent demodulation of a physical channel.

The DMRS may be mapped to physical channels such as PBCH, PDCCH, PDSCH, PUCCH and PUSCH, and the embodiment of the present application mainly describes DMRS in a PUSCH channel.

The DMRS is a reference signal dedicated to the UE, and configuration information of the DMRS mainly consists of three parts:

1. DMRS mapping type (mapping type): the mapping type determines the symbol start position of the DMRS in the time domain.

2. DMRS configuration type (DMRS type): the DMRS type, sometimes also referred to as DMRS configuration type, determines the RE (Resource Element) mapping density of the DMRS in the frequency domain.

3. DMRS post-set position (additional position): the DMRS signals can be divided into a preamble DMRS (Front loaded DMRS) and a postamble DMRS according to the location, which is referred to herein as additional position. The pre-DMRS is necessary, and the post-DMRS may not be configured. The post-DMRS is generally used in a medium-high speed moving scene, and the estimation precision of a time-varying channel is improved by inserting more DMRS pilot symbols in a scheduling time slot. Alternatively, a maximum of 3 additional position can be configured within one slot.

1. DMRS mapping type (DMRS mapping type)

To meet different deployment scenarios, NR defines two different time domain mapping structures (mapping types) for DMRS: a mapping type A (mapping type A) and a mapping class B (mapping type B). The two time domain structures mainly differ in the location of the first DMRS symbol.

Mapping type A

The DMRS of mapping type a time domain structure, the symbol of the first DMRS is located in symbol #2 (symbol 2) or symbol #3 (symbol 3) within the slot. This mapping method is independent of the starting position of the actual data transmission, and instead, the DMRS is fixedly placed at the positions of the opposite edges of the slot. The mapping type A is mainly used for the scene that the data transmission occupies most symbols of the time slot.

Fig. 4 is a DMRS map of mapping type a, where the first symbol of the DMRS is located in symbol #2 of the slot.

Mapping type B

The DMRS time domain structure of mapping type B, the first DMRS symbol is fixedly mapped in the first OFDM symbol of a data transmission resource (PUSCH). At this time, the DMRS is located not at a start position symbol #0 with respect to the slot but at a start position with respect to the data transmission resource. The mapping type B is mainly used for a scene that the data transmission PUSCH occupies only a small part of symbols of one time slot, so as to reduce transmission delay.

Fig. 5 is a DMRS map of mapping type B, where the first symbol is located in symbol #8.

Start symbol position l of map type a and map type B ₀ The protocol is specified as follows:

The reference point for l and the position l ₀ of the first DM-RS symbol depends on the mapping type (reference point of l and position of first DM-RS symbol l ₀ Depending on the mapping type):

for PUSCH mapping type A (for PUSCH mapping type a):

l is defined relative to the start of the slot (l is defined with respect to the beginning of the slot).

-l ₀ ＝3 if the higher-layer parameter dmrs-TypeA-Position is equal to 'pos3'and l ₀ =2 other wise (if the higher layer parameter dmrs-TypeA-Position is equal to "pos3", then l ₀ =3, otherwise l ₀ ＝2).

for PUSCH mapping type B (for PUSCH mapping type B):

L is defined relative to the start of the scheduled PUSCH resources (l is defined with respect to the start of scheduling PUSCH resources).

-l ₀ ＝0.

That is, (1) if it is the mapping type a, the starting Position of the DMRS is relative to the starting Position of the slot, the value depends on MIB (Master Information Block ) message parameter DMRS-type a-Position:

if DMRS-TypeA-position=pos 2, the starting position of DMRS starts from symbol #2 of the slot;

if DMRS-TypeA-position=pos 3, the DMRS start position starts from symbol #3 of the slot.

For the dmrs-TypeA-position parameter protocol, only two values of pos2 and pos3 are defined. That is, if the scheduled PUSCH resource starts from symbol #4, the DMRS cannot use the mapping type a. If the PDCCH channel occupies symbols # 0-2, the DMRS cannot be configured as pos2 and cannot collide with the PDCCH position.

(2) If it is the mapping type B, the starting position of the DMRS is relative to the scheduled PUSCH resource, and the starting symbol position is fixed at the 0 th symbol of the PUSCH scheduling resource, refer to fig. 5.

Acquisition mode of DMRS configuration type:

the UE is obtained by parsing the DMRS mapping type carried in the RRC (Radio Resource Control ) message.

2. DMRS configuration type (DMRS type)

After the base station selects the mapping type for the PUSCH DMRS, the base station may continue to configure frequency domain resources for the DMRS, i.e., DMRS configuration type (DMRS type). DMRS type is sometimes also referred to as DMRS configuration type (DMRS Configuration type).

The 3GPP specifies two configuration types for PUSCH DMRS: type 1 and type 2.

As shown in (1) of fig. 6, for type 1, DMRS REs are distributed at intervals in the frequency domain of a certain symbol, with a density of 50%; as shown in (2) of fig. 6, for type 2, DMRS REs are connected together every two REs, spaced apart from each other by 4 REs, and have a density of 33.3%.

3. Parameters of DMRS configuration information

UE is configured by parsing RRC message: RRCSetup/RRCREConfiguration→PUSCH-Config→DMRS-UpLinkConfig to learn parameters of the DMRS configuration information.

The parameters of the DMRS configuration information include:

dmrs-additional position: and (5) rearing the position of the DMRS. If the parameter is not configured in the RRC message, the default value pos2 indicates that there are 2 positions of the post DMRS. The NR protocol allows the base station to configure a post DMRS (corresponding to pos 3) of up to 3 positions for PDSCH in one slot, and also allows the post DMRS (corresponding to pos 0) to be not configured.

When DMRS-additionalposition=pos 1, the post DMRS is located at symbol#11;

When DMRS-additionalposition=pos 2, the post DMRS is located in symbol #7, #11;

DMRS-additionalposition=pos 3, the post DMRS is located at symbol #5, #8, #11.

dmrs-Type: configuration type of PUSCH DMRS. If the parameter is not configured in the RRC message, the value of type 1 is defaulted.

maxLength: the maximum number of symbols occupied by the preamble DMRS. If the parameter is not configured in the RRC message, the default value len1, that is, the preamble DMRS occupies only 1 symbol. The value=len2 indicates that the preamble DMRS may occupy 2 symbols at most, some slots may occupy 1, and other slots may occupy 2. Actually occupies a few symbols and is dynamically determined by the "Antenna port(s)" field in DCI 1-1. Two symbols are designed to support more antenna ports.

phaseTrackingRS: the phase tracks the reference signal. If the parameter is not configured in the RRC message, default is not configured. The phase noise in the FR1 band has limited impact on system performance and is not discussed in this application.

scramblingID0 and scramblingID1: and 2 parameters for calculating the PUSCH DMRS sequence.

4. DMRS RE time-frequency position calculation

The calculation formula of DMRS RE time-frequency position (k, l) is given in protocol 38.211 as follows:

wherein,l is the time domain starting position of DMRS, for PUSCH mapping type a: l is defined with respect to the beginning of a slot; for PUSCH mapping type B: l is defined with respect to the start of scheduling PUSCH resources; Obtained by looking up table 3 and table 4; l' is obtained by looking up table 5.

Wherein k' =0, 1; n is a non-negative integer.

Table 1 PUSCH DMRS configuration type 1

Table 2 PUSCH DMRS configuration type 2

Table 3PUSCH DMRS locationFor single symbol DMRS

Table 4PUSCH DMRS locationFor dual symbol DMRS

Table 5PUSCH DMRS time index l' and antenna port p

The mapping type a+type 1+single symbol is illustrated.

For example: DMRS-type a-position=pos 2, DMRS mapping type =a, DMRS type=1 (i.e. Configuration Type), DMRS-additionalposition=pos 1, maxlen=1, the current slot PUSCH occupies 13 OFDM symbols, and antenna port p=1000.

Then, the position of DMRS RE frequency domain k is calculated first:

step 1: a calculation formula for the frequency domain position k is determined. Since DMRS type=1, p=1000, the formula of the frequency domain position k becomes k=4n+2k' according to table 1 at this time.

Step 2: the frequency domain position k of each RE is determined.

(1) If n=0, k '=0, then k=4n+2k' =0;

(2) If n=0, k '=1, then k=4n+2k' =2;

(3) If n=1, k '=0, then k=4n+2k' =4;

(4) If n=1, k '=1, then k=4n+2k' =6;

(5) If n=2, k '=0, then k=4n+2k' =8;

(6) If n=2, k '=1, then k=4n+2k' =10;

(7) If n=3, k '=0, then k=4n+2k' =12;

(8) If n=3, k '=1, then k=4n+2k' =14;

by analogy, as shown in fig. 7, it is possible to obtain the frequency domain positions (0, 2, 4, 6, 8, 10) of the DMRS within a single RB in the frequency domain at this time.

Step 3: calculating the position of the DMRS RE time domain: a time domain table to be used next is determined. Since maxlen=1, table look-up 3 is required at this time.

Step 4: determining l _d Is a value of (2). Since it is the mapping type A, l _d Meaning the number of symbols between the first OFDM symbol of the current slot and the last symbol of the PUSCH resource. For this example, according to the preconditions, l _d ＝14。

Step 5: all starting symbol positions (there may be multiple starting positions in the same slot) of the DMRS RE of the current slot are determined. Continue looking up L in Table 3 _d In the row of=14, since DMRS-additionalposition=pos 1, the time-domain positions of DMRS are 2: l (L) ₀ 、l ₁ 。

Step 6: the value of l' is determined. Table 5, because of the single symbol DMRS, knows that l' =0 at this time.

Step 7: the final time domain position l is determined. Since there are 1 post DMRS, there are 2 final time domain positions of DMRS REs in this example, i=l, respectively ₀ +l’、l ₁ +l' =symbol#2, symbol#11. As shown in fig. 8 below. Wherein, symbol#2 corresponds to a pre-DMRS, and symbol#11 corresponds to a post-DMRS.

In summary, the time-frequency position of the DMRS can be determined according to the configuration information such as the DMRS configuration type, the DMRS mapping type, the number of single and double symbols in the RRC message, that is, the CDM (Code-Division Multiplexing, code division multiplexing) group corresponding to the DMRS can be determined.

The base station may transmit DMRS signals in each PDSCH slot, and the DMRS transmitted in each slot may include multiple orthogonal reference signals. Orthogonal reference signals with the same time domains can be distinguished by the frequency domain or the code domain.

In NR, DMRS orthogonal signals, the number of layers, and antenna ports are in one-to-one correspondence. If the downlink 4-stream is currently scheduled, then there are 4 layers of transmissions, together with 4 different DMRS orthogonal signals, mapped to 4 different antenna ports through the precoding matrix.

For DMRS reference signals of a single symbol, configuration type 1 can support at most 4 orthogonal DMRS signals, and configuration type 2 can support at most 6 orthogonal DMRS signals.

For the DMRS reference signal of the dual symbol, the configuration type 1 can support at most 8 orthogonal DMRS signals, and the configuration type 2 can support at most 12 orthogonal DMRS signals.

Two layers of DMRS signals using the same subcarrier belong to the same code division multiplexing group (CDM group). They cannot be distinguished from each other by the time domain, the frequency domain, but only by the code domain (i.e., OCC (Orthogonal Cover Code, orthogonal cover code)).

Referring to table 1, the DMRS of type 1 has 2 CDM groups, p (Port, antenna Port) 1000/1001/1004/1005 belongs to CDM group 0, and Port 1002/1003/1006/1007 belongs to CDM group 1.

Referring to table 2, the DMRS of type 2 has 3 CDM groups, port 1000/1001/1006/1007 belongs to CDM group 0, port 1002/1003/1008/1009 belongs to CDM group 1, and Port 1004/1005/1010/1011 belongs to CDM group 2.

For PDSCH/PUSCH, the data layer of the data transmission corresponds to the DMRS port used for demodulation. The data channel (PDSCH/PUSCH) DMRS design in NR systems mainly comprises the following aspects:

front-load DMRS (pre-DMRS): the location where the DMRS first appears should be as close to the start point of scheduling as possible within each scheduling time unit. The use of Front-load DMRS helps the receiving side to estimate the channel quickly and perform reception detection, and plays an important role in reducing the delay and supporting a so-called self-contained structure. The front-load DMRS may occupy at most two consecutive OFDM symbols depending on the total number of orthogonal DMRS ports.

Additional DMRS (post DMRS): for low mobility scenarios, the front-load DMRS can obtain channel estimation performance meeting demodulation requirements with lower overhead. However, the mobility considered by NR systems can be up to 500km/h (kilometers/hour), and in addition to front-load DMRS, in medium/high speed scenarios, it is also necessary to insert more DMRS symbols within the scheduling duration to meet the accuracy of estimation of channel time variability, in face of such large dynamic range. Aiming at the problem, a DMRS structure combining front-load DMRS and an additional DMRS with configurable time domain density is adopted in an NR system. The pattern of each set of additional DMRS is a repetition of the front-load DMRS.

In each scheduling time unit, if an additional DMRS exists, the pattern of each group of additional DMRS is consistent with the front-load DMRS. Therefore, the design of front-load DMRS is the basis of DMRS design. The Front-load DMRS design concept is divided into two types, wherein the first type (type 1) adopts a COMB structure) +occ (Orthogonal Cover Code ) structure, and the second type (type 2) is based on an FDM (Frequency Division Multiplexing ) +occ structure.

The front-load DMRS may be configured as two OFDM (Orthogonal Frequency Division Multiplexing ) symbols at most, depending on the number of orthogonal ports used for transmission.

In an alternative embodiment, configuration type, a single symbol front-load DMRS pattern is shown in fig. 9.configuration type1, a double symbol front-load DMRS pattern is shown in fig. 10.configuration type2, single symbol front-load DMRS pattern is shown in fig. 11.configuration type2, a double symbol front-load DMRS pattern is shown in fig. 12.

In a medium/high speed scenario, in addition to the front-load DMRS, more DMRS symbols need to be inserted within the scheduling duration to meet the accuracy of the estimation of the channel time variability. The NR system adopts a DMRS structure combining front-load DMRS and the additional DMRS with configurable time domain density. The pattern of each set of additional DMRS is a repetition of the front-load DMRS. Therefore, in accordance with the front-load DMRS, each set of additional DMRS may occupy at most two consecutive DMRS symbols. According to a specific usage scenario, at most three sets of additional DMRS can be configured in each schedule. The number of additional DMRS depends on the higher layer parameter configuration and the specific scheduling duration.

Tables 6, 7, 8 and 9 are DMRS port assignment tables for different parameter configurations under the uplink CP-OFDM waveform.

Table 6 Antennaport(s), transform precoder is disabled, DMRS-type=1, maxlength=1, rank=1 (DMRS Type 1, single symbol, single stream transmission)

Table 7Antenna port(s), transform precoder is disabled, DMRS-type=1, maxlength=1, rank=2 (DMRS Type 1, single symbol, dual stream transmission)

Value	Number of DMRS CDM group(s)without data	DMRS port(s)
0	1	0,1
1	2	0,1
2	2	2,3
3	2	0,2
4-7	Reserved	Reserved

Table 8Antenna port(s), transform precoder is disabled, DMRS-type=1, maxlength=1, rank=3 (DMRS Type 1, single symbol, three stream transmission)

Value	Number of DMRS CDM group(s)without data	DMRS port(s)
0	2	0-2
2-7	Reserved	Reserved

Table 9Antenna port(s), transform precoder is disabled, DMRS-type=1, maxlength=1, rank=4 (DMRS Type 1, single symbol, 4 stream transmission)

Value	Number of DMRS CDM group(s)without data	DMRS port(s)
0	2	0-3
2-7	Reserved	Reserved

Rate matching (rate matching)

The PUSCH processing procedure comprises the following steps: CRC and code block segmentation, channel coding, rate matching, code block concatenation, scrambling, modulation, layer mapping, etc. are added. The coded data obtained through channel coding may sometimes be more, but the allocated available resources may be less, for example, some resources are used for reference signals, control channels or system messages, so that the terminal needs to puncture the non-reusable resources and does not transmit data on the resources. So this time a rate matching is needed to achieve a match of data and resources.

In R18 uplink MIMO (Multiple Input Multiple Output ) enhancement, simultaneous uplink transmission for multiple TRP is considered to be implemented by multiple panels of a terminal, for further improving uplink system transmission throughput and transmission reliability.

In PDSCH (Physical Downlink Shared Channel ) based on M-DCI scheduling, time-frequency resource allocation of different PDSCH supports full/partial/non-overlapping, for example, as shown in fig. 13, transmission resources of PUSCH1 and PUSCH2 overlap completely in the time domain, or as shown in fig. 14, transmission resources of PUSCH1 and PUSCH2 overlap partially in the time domain and the frequency domain. When considering supporting PUSCH based on M-DCI scheduling, similar resource allocation situations are considered, in the M-DCI PUSCH transmission scheme of R16, cooperative transmission in a TDM (Time Division Multiplexing ) manner is mainly supported, and what resource allocation situations and how to support are currently required to be discussed on the premise of a multi-panel terminal.

For multi-panel uplink transmission based on M-DCI in R18, when a terminal transmits different PUSCHs which are completely overlapped/partially overlapped on a time domain and completely overlapped/partially overlapped on a frequency domain from different panels, interference is generated between the DMRS of one PUSCH and the DMRS and data of the other PUSCH, so that the actual channel estimation and the receiving performance are reduced.

Referring to fig. 15, a flowchart of a DMRS configuration method according to an embodiment of the present application is shown, where the method may be applied to the communication system shown in fig. 1, and the method is performed by a terminal. The method comprises the following steps.

Step 210: receiving configuration information of a DMRS of a PUSCH sent by access network equipment; under a transmission configuration that a plurality of DCI scheduling terminals perform uplink simultaneous transmission (Simultaneous Transmission via Multi-Panel, STxMP) based on two antenna panels, the configuration information of the DMRS is used to instruct the terminals to respectively send the DMRS corresponding to the PUSCH through the two antenna panels according to the configuration information.

The terminal comprises a plurality of antenna panels, and supports uplink simultaneous transmission of the plurality of antenna panels. Optionally, the terminal comprises two panels: a first panel (first antenna panel) and a second panel (second antenna panel). And the terminal supports the first panel and the second panel to simultaneously carry out uplink transmission.

Optionally, under a transmission configuration that uplink simultaneous transmission is performed by the plurality of DCI scheduling terminals based on at most two antenna panels, the configuration information of the DMRS is used to instruct the terminals to respectively send the DMRS corresponding to the PUSCH through at most two antenna panels according to the configuration information.

For example, the configuration information of DMRS of PUSCH is carried in RRC message and/or DCI message.

Exemplary configuration information of the DMRS includes a DMRS mapping type, a DMRS configuration type, a single-double symbol number, and the like. Of course, the configuration information of the DMRS may also include any of the parameters mentioned above that relate to DMRS configuration. Exemplary, the DMRS mapping type, DMRS configuration type, single and double symbol number are carried in the RRC message.

Optionally, the configuration information of the DMRS further includes a target field, where the target field may be: a non-reusable CDM group field (CDM groups without data). The target field is carried in the DCI message.

For example, the terminal receives an RRC message sent by the access network device, where the RRC message carries configuration information of the DMRS of the PUSCH. Or the first panel receives first DCI sent by the first TRP, and the first DCI carries configuration information of a first DMRS corresponding to a first PUSCH sent by the first panel; the second panel receives second DCI sent by the second TRP, and the second DCI carries configuration information of a second DMRS corresponding to a second PUSCH sent by the second panel. For example, the first DCI is used to schedule the first panel to transmit the first PUSCH at a first transmission occasion, the second DCI is used to schedule the second panel to transmit the second PUSCH at a second transmission occasion, and the first transmission occasion and the second transmission occasion have partially overlapping or completely overlapping time-frequency resources.

The configuration information such as DMRS mapping type, DMRS configuration type, number of single/double symbols, etc. is used to indicate CDM group/CDM group set corresponding to DMRS of PUSCH. For example, the corresponding CDM group/CDM group set may be determined according to the DMRS mapping type, the DMRS configuration type, and the number of single/double symbols by table lookup.

Optionally, the configuration information of the DMRS is used to configure a first DMRS of a first PUSCH transmitted through a first panel to correspond to a first CDM group or a first CDM group set, and a second DMRS of a second PUSCH transmitted through the second panel to correspond to a second CDM group or a second CDM group set.

Exemplary, the configuration information of the DMRS includes first configuration information corresponding to the first panel and second configuration information corresponding to the second panel. The first configuration information comprises a first DMRS mapping type, a first DMRS configuration type and a first single-double symbol number; the second configuration information includes a second DMRS mapping type, a second DMRS configuration type, and a second single/double symbol number. The first CDM group/first CDM group set corresponding to the first DMRS transmitted by the first panel may be determined according to the first configuration information. And determining a second CDM group/a second CDM group set corresponding to the second DMRS sent by the second panel according to the second configuration information.

The access network device may configure two DMRS of two panels in the same CDM group according to two PSUCH scheduling conditions, or may configure two DMRS of two panels in different CDM groups. For example, when interference between two panels is severe, two DMRS may be configured in different CDM groups, and when interference between two panels is severe, two DMRS may be configured in the same CDM group.

For example, as shown in fig. 16, according to the configuration information of the DMRS, the first panel transmits the first DMRS of the first PUSCH on REs corresponding to the first CDM group; the second panel transmits a second DMRS of a second PUSCH on REs corresponding to the second CDM group. The two DMRSs transmitted by the two panels may be separated in the time and frequency domains.

Or, as shown in fig. 17, according to the configuration information of the DMRS, the first panel transmits the first DMRS of the first PUSCH on the REs corresponding to the first CDM group; the second panel also transmits a second DMRS of a second PUSCH on REs corresponding to the first CDM group. The two DMRSs of the two panel transmissions are transmitted on the same time-frequency resource, and the two DMRSs of the two panel transmissions are distinguished on the code domain by the OCC.

The non-multiplexing CDM group field is used to indicate a CDM group that is not multiplexed with the transmission data portion. For example, the non-reusable CDM group field indicates that the first CDM group is non-reusable, and when rate matching of the data portion of PUSCH is performed, the terminal punctures transmission resources corresponding to the first CDM group, and does not transmit the data portion of PUSCH on REs corresponding to the first CDM group.

The terminal receives a plurality of DCIs sent by the access network device, and the plurality of DCIs schedule a plurality of panels of the terminal to perform uplink transmission at the same time. The simultaneous transmission means that a plurality of transmission occasions of uplink transmission have full/partial-coverage of time domain and full/partial-coverage of frequency domain resources.

For example, the terminal receives a first PDCCH sent by a first TRP through a first panel, the first PDCCH includes a first DCI, and the first DCI schedules the first panel to send a first PUSCH on a first transmission occasion; the terminal receives a second PDCCH sent by a second TRP through a second panel, the second PDCCH comprises second DCI, and the second DCI schedules the second panel to send a second PUSCH on a second transmission occasion. Wherein, the first transmission opportunity and the second transmission opportunity have overlapped symbols in the time domain and have overlapped frequency bands in the frequency domain.

In summary, in the method provided in this embodiment, the access network device configures the configuration information of the DMRS of the PUSCH for the terminal device, when the access network device schedules two panels of the terminal device to simultaneously transmit the PUSCH through a plurality of DCI, the terminal device transmits the DMRS of the PUSCH from the two panels according to the configuration information of the DMRS, so as to implement the respective configuration of the two DMRS transmitted by the two panels, and the access network device may avoid interference between the two DMRS by configuring the two DMRS to different time-frequency resources or code domains, thereby improving the performance of the access network device in receiving the DMRS and performing channel estimation according to the DMRS.

Referring to fig. 18, a flowchart of a DMRS configuration method according to an embodiment of the present application is shown, where the method may be applied to the communication system shown in fig. 1, and the method is performed by an access network device. The method comprises the following steps.

Step 220: transmitting configuration information of the DMRS of the PUSCH to the terminal; under the transmission configuration of uplink simultaneous transmission based on two antenna panels through a plurality of DCI scheduling terminals, the configuration information of the DMRS is used for indicating the terminals to respectively send the DMRS corresponding to the PUSCH through the two antenna panels according to the configuration information.

Illustratively, the access network device configures DMRS ports/port groups corresponding to different PUSCHs transmitted from different panels from different CDM groups/CDM group sets. Or, the access network device configures DMRS ports/port groups corresponding to different PUSCHs transmitted from different panls to allow the same CDM group/CDM group set to be used.

Referring to fig. 19, a flowchart of a DMRS configuration method according to an embodiment of the present application is shown, where the method may be applied to the communication system shown in fig. 1, and the method is performed by a terminal and an access network device. The method comprises the following steps.

Step 301: the access network equipment sends an RRC message to the terminal, wherein the RRC message bears the configuration information of the DMRS of the PUSCH.

Optionally, the configuration information of the DMRS includes first configuration information of a first DMRS corresponding to the first PUSCH transmitted by the first antenna panel and second configuration information of a second DMRS corresponding to the second PUSCH transmitted by the second antenna panel.

In an alternative embodiment, the access network device configures different CMD sets for the two DMRS corresponding to the two panels, that is, the first DMRS port/port set corresponding to the first DMRS does not have a DMRS port belonging to the same CDM set in the second DMRS port/port set corresponding to the second DMRS.

For example, the first CDM group and the second CDM group are different CDM groups; the first CDM group set does not include the second CDM group; the second CDM group set does not include the first CDM group; the first CDM group set and the second CDM group set do not include the same CDM group.

In another alternative embodiment, the access network device configures the same CMD group for two DMRS corresponding to two panels, that is, at least one DMRS port in a first DMRS port/port group corresponding to a first DMRS and a second DMRS port/port group corresponding to a second DMRS belongs to the same CDM group.

For example, the first CDM group and the second CDM group are the same CDM group; the first CDM group set includes a second CDM group; the second CDM group set includes a first CDM group; the first CDM group set and the second CDM group set include at least one identical CDM group.

If the first DMRS port/port group corresponding to the first DMRS and the second DMRS port/port group corresponding to the second DMRS do not have DMRS ports belonging to the same CDM group, that is, the first configuration information is different from at least one configuration of the DMRS mapping type, the DMRS configuration type, and the single-double symbol number configuration in the second configuration information, or the positions of the first DMRS symbols indicated by the first configuration information and the second configuration information in the time slot are different.

If at least one DMRS port belongs to the same CDM group in the first DMRS port/port group corresponding to the first DMRS and the second DMRS port/port group corresponding to the second DMRS, that is, the DMRS mapping type, the DMRS configuration type, and the single-symbol/double-symbol number configuration in the first configuration information are the same as those in the second configuration information, and the positions of the first DMRS symbols indicated by the first configuration information and the second configuration information in the time slot are the same.

Step 302: the access network device sends a first DCI to the first panel.

The first DCI is used to schedule the first panel to transmit the first PUSCH.

Step 303: the access network device sends the second DCI to the second panel.

The second DCI is used to schedule the second panel to transmit the second PUSCH.

Step 304: and the terminal transmits the first DMRS of the first PUSCH through the first panel according to the configuration information of the DMRS.

When the access network equipment simultaneously transmits the PUSCH through a plurality of panels of the terminal, the terminal respectively transmits a first DMRS of the first PUSCH through the first panel and transmits a second DMRS of the second PUSCH through the second panel according to the configuration information of the DMRS.

When the access network device configures DMRS ports/port groups corresponding to DMRS corresponding to different PUSCHs transmitted from different panels to come from different CDM groups, the two panels respectively transmit the two DMRS on REs corresponding to different CDM groups.

When the access network device configures DMRS ports/port groups corresponding to DMRS corresponding to different PUSCHs transmitted from different panels to be from the same CDM group, the two panels may transmit the two DMRS on REs corresponding to the same CDM group.

Step 305: and the terminal transmits a second DMRS of the second PUSCH through the second panel according to the configuration information of the DMRS.

In summary, in the method provided in this embodiment, the access network device configures the configuration information of the DMRS of the PUSCH for the terminal device, when the access network device schedules two panels of the terminal device to simultaneously transmit the PUSCH through a plurality of DCI, the terminal device transmits the DMRS of the PUSCH from the two panels according to the configuration information of the DMRS, so as to implement the respective configuration of the two DMRS transmitted by the two panels, and the access network device may avoid interference between the two DMRS by configuring the two DMRS to different time-frequency resources or code domains, so as to improve the performance of the access network device in receiving the DMRS and performing channel estimation according to the DMRS.

For example, in at least one of the following scenarios, the access network device may configure DMRS port/port groups corresponding to different PUSCHs transmitted from different panels to be from independent CDM groups.

Scene one:

the first antenna panel and the second antenna panel respectively transmit the scenes of the respective PUSCHs to the same transmission and reception point TRP.

When the first DCI schedules the first panel to transmit the first PUSCH to the first TRP and the second DCI schedules the second panel to transmit the first PUSCH to the first TRP, the access network device configures different CMD groups for two DMRS corresponding to the two panels.

For example, a first DMRS of a first PUSCH transmitted by a first pattern corresponds to a first CDM group/first CDM group set; the second DMRS of the second PUSCH transmitted by the second panel corresponds to the second CDM group/second CDM group set. Wherein the first CDM group and the second CDM group are different CDM groups, or the first CDM group set does not contain the second CDM group, or the second CDM group set does not contain the first CDM group, or the first CDM group set and the second CDM group set do not contain the same CDM group.

That is, at least one configuration of the DMRS mapping type, the DMRS configuration type, and the single-double symbol number configuration in the first configuration information is different from that in the second configuration information, or the first configuration information is different from the position of the first DMRS symbol indicated by the second configuration information in the slot.

Scene II:

the first antenna panel and the second antenna panel respectively transmit the scenes of the respective PUSCH to different TRPs.

When the first DCI schedules the first panel to transmit the first PUSCH to the first TRP and the second DCI schedules the second panel to transmit the first PUSCH to the second TRP, the access network device configures different CMD groups for two DMRS corresponding to the two panels.

Optionally, in a scenario where two antenna panels are scheduled to send PUSCH to two TRPs respectively, the access network device may further determine an interference situation between two panels according to signal detection results of two beams sent by the two panels respectively, and if interference between two panels is greater, different CDM groups are configured for two DMRS of the two panels.

For example, the access network device detects the first beam sent by the first panel, and obtains a first signal detection result, where the first signal detection result may include at least one of SINR (Signal to Interference plus Noise Ratio, signal-to-interference-and-noise ratio), RSRP (Reference Signal Receiving Power, reference signal received power), RSRQ (Reference Signal Receiving Quality, reference signal received quality), RSSI (Received Signal Strength Indication ). And under the condition that the first signal detection result meets the interference condition, sending configuration information of the DMRS to the terminal, wherein the configuration information of the DMRS configures that a first DMRS port/port group corresponding to the first DMRS and a second DMRS port/port group corresponding to the second DMRS do not have the DMRS ports belonging to the same CDM group.

The interference condition may be that data in the first signal detection result reaches a threshold.

Or, the access network device detects the second beam sent by the second panel to obtain a second signal detection result, where the second signal detection result may include at least one of SINR, RSRP, RSRQ, RSSI. And under the condition that the second signal detection result meets the interference condition, sending configuration information of the DMRS to the terminal, wherein the configuration information of the DMRS configures that no DMRS port belonging to the same CDM group exists in a first DMRS port/port group corresponding to the first DMRS and a second DMRS port/port group corresponding to the second DMRS.

Optionally, if the first signal detection result or the second signal detection result does not meet the interference condition, the access network device may also send configuration information of the DMRS to the terminal, where the configuration information of the DMRS configures that no DMRS port belonging to the same CDM group exists in a first DMRS port/port group corresponding to the first DMRS and a second DMRS port/port group corresponding to the second DMRS. That is, in the case where interference between two panels is not severe, the access network device may also configure different CDM groups for the two DMRSs.

In an alternative embodiment, in the case that multiple ports are scheduled by multiple DCI to send PUSCHs to different TRPs simultaneously, the access network device configures by default that DMRS ports belonging to the same CDM group do not exist in a first DMRS port/port group corresponding to the first DMRS and a second DMRS port/port group corresponding to the second DMRS.

For example, in a scenario where two antenna panels respectively send PUSCHs to two TRPs, the access network device may also configure DMRS ports/port groups corresponding to different PUSCHs sent from different panels to be from the same CDM group.

Scene III:

the first antenna panel and the second antenna panel transmit PUSCH to different TRPs.

When the first DCI schedules the first panel to transmit the first PUSCH to the first TRP and the second DCI schedules the second panel to transmit the first PUSCH to the second TRP, the access network device configures the same CMD group for two DMRS corresponding to the two panels.

For example, a first DMRS of a first PUSCH transmitted by a first pattern corresponds to a first CDM group/first CDM group set; the second DMRS of the second PUSCH transmitted by the second panel corresponds to the second CDM group/second CDM group set. Wherein the first CDM group and the second CDM group are the same CDM group, or the first CDM group comprises the second CDM group, or the second CDM group comprises the first CDM group, or the first CDM group and the second CDM group comprise at least one same CDM group.

That is, the DMRS mapping type, the DMRS configuration type, and the single-double symbol number configuration in the first configuration information are the same as those in the second configuration information, and the positions of the first DMRS symbol in the slot indicated by the first configuration information and the second configuration information are the same.

Optionally, in a scenario where two antenna panels are scheduled to send PUSCH to two TRPs respectively, the access network device may further determine an interference situation between two panels according to signal detection results of two beams sent by the two panels respectively, and if interference between two panels is greater, different CDM groups are configured for two DMRS of the two panels. If the interference between two panels is small, the same CDM group may be configured for two DMRSs of the two panels.

For example, the access network device detects the first beam sent by the first panel, to obtain a first signal detection result, where the first signal detection result may include at least one of SINR, RSRP, RSRQ, RSSI. And under the condition that the first signal detection result does not meet the interference condition, sending configuration information of the DMRS to the terminal, wherein the configuration information of the DMRS configures at least one DMRS port in a first DMRS port/port group corresponding to the first DMRS and a second DMRS port/port group corresponding to the second DMRS to belong to the same CDM group.

The interference condition may be that data in the first signal detection result does not reach a threshold.

Or, the access network device detects the second beam sent by the second panel to obtain a second signal detection result, where the second signal detection result may include at least one of SINR, RSRP, RSRQ, RSSI. And under the condition that the second signal detection result does not meet the interference condition, sending configuration information of the DMRS to the terminal, wherein the configuration information of the DMRS configures at least one DMRS port in a first DMRS port/port group corresponding to the first DMRS and a second DMRS port/port group corresponding to the second DMRS to belong to the same CDM group.

In summary, in the method provided in this embodiment, when multiple panels of a scheduling terminal transmit PUSCH to the same TRP, interference between the multiple panels is large, DMRS ports/DMRS port groups corresponding to different PUSCHs transmitted from different panels may be configured from independent CDM groups, so that interference between the panels is reduced.

In the method provided by the embodiment, when a plurality of panels of a scheduling terminal send PUSCHs to different TRPs, the DMRS ports/DMRS port groups corresponding to different PUSCHs sent from different panels can be configured to come from independent CDM groups, so that interference among the panels is reduced; DMRS ports/DMRS port groups corresponding to different PUSCHs transmitted from different panels may also be configured to be from the same CDM group.

In the method provided by the embodiment, when a plurality of panels of a scheduling terminal send PUSCHs to different TRPs, the DMRS can be configured according to the interference condition between the two panels, if the interference between the two panels is larger, the DMRS ports/DMRS port groups corresponding to different PUSCHs sent from different panels can be configured from independent CDM groups, so that the interference between the panels is reduced; if interference between two panels is small, DMRS ports/DMRS port groups corresponding to different PUSCHs transmitted from different panels may be configured to be from the same CDM group.

For example, in order to avoid interference between the DMRS of one PUSCH and the data portion of another PUSCH, the embodiments of the present application may also use the target field to perform rate matching on the data portion of the PUSCH.

The configuration information of the DMRS is also used for rate matching of PUSCH data portions of the two antenna panels; the configuration information of the DMRS includes a target field for indicating a CDM group that is not multiplexed with a data portion of PUSCH transmission.

Referring to fig. 20, a flowchart of a DMRS configuration method according to an embodiment of the present application is shown, where the method may be applied to the communication system shown in fig. 1, and the method is performed by a terminal and an access network device. The method comprises the following steps.

Step 401: the access network device sends a first target field to a first panel of the terminal, and code point corresponding information of the first target field is used for indicating that time-frequency resources corresponding to the second CDM group/the second CDM group set cannot be multiplexed with a data part of the PUSCH transmission.

Optionally, the target field is carried in DCI. The first panel receives first DCI sent by access network equipment, and a first target field is carried in the first DCI.

For example, the first target field may be CDM groups without data (non-reusable CDM group) in the antenna port (antenna port) domain of the first DCI.

CDM groups without data indicates which CDM groups of REs are currently incapable of multiplexing data.

For example, CDM groups without data can take three values of 1, 2, and 3.

A value of 1 indicates that REs of the current CDM group 0 cannot multiplex data;

a value of 2 indicates that neither RE of the current CDM group 0 nor CDM group 1 can multiplex data;

a value of 3 indicates that none of the REs of the current CDM group 0, CDM group 1, and CDM group 2 can multiplex data.

Accordingly, the access network device may indicate to the first panel through the first target field a CDM group/CDM group set that has been occupied by the second DMRS of the second panel.

For example, the second DMRS is configured as CDM group 0, and the first target field may take on a value of 1. The data portion representing the first PUSCH is not multiplexed with REs of CDM group 0. For another example, the second DMRS is configured as CDM group 1, and the first target field may take on a value of 2. The data portion representing the first PUSCH is not multiplexed with REs of CDM group 0 and CDM group 1.

Step 402: the access network device sends a second target field to a second panel of the terminal, and code point corresponding information of the second target field is used for indicating that time-frequency resources corresponding to the first CDM group/the first CDM group set cannot be multiplexed with a data part of the PUSCH transmission.

Optionally, the target field is carried in DCI. And the second panel receives second DCI sent by the access network equipment, and a second target field is carried in the second DCI.

For example, the second target field may be CDM groups without data in the antenna port of the second DCI.

Accordingly, the access network device may indicate to the second panel through the second target field that the CDM group/CDM group set has been occupied by the first DMRS of the first panel.

For example, the first DMRS is configured as CDM group 1, and the first target field may take on a value of 2. The data portion representing the second PUSCH may not multiplex REs of CDM group 0 and CDM group 1. For another example, the second DMRS is configured as CDM group 2, and the first target field may take on a value of 3. The data portion representing the second PUSCH may not multiplex REs of CDM group 0, CDM group 1, and CDM group 2.

Step 403: the terminal performs rate matching of the data portion of the first PUSCH according to the code point of the first target field.

The terminal device rate-matches the data portion of the first PUSCH according to the non-reusable CDM group indicated by the first target field. Optionally, in the transmission resource of the first PUSCH, the terminal device punctures (holes) corresponding REs of the non-multiplexing CDM group on the physical RE resource corresponding to the data transmission of the first PUSCH, that is, performs rate matching on the data portion of the first PUSCH, and further maps the data portion of the first PUSCH on the remaining transmission resources REs.

Step 404: and the terminal performs rate matching of the data part of the second PUSCH according to the code point of the second target field.

The terminal device rate-matches the data portion of the second PUSCH according to the non-reusable CDM group indicated by the second target field. Optionally, in the transmission resource of the second PUSCH, the terminal device punctures REs corresponding to the non-multiplexing CDM group on the physical RE resources corresponding to the data transmission of the second PUSCH, that is, performs rate matching on the data portion of the second PUSCH, and further maps the data portion of the second PUSCH on the remaining transmission resources REs.

In summary, in the method provided in this embodiment, when multiple panels of a scheduling terminal send PUSCH to the same TRP, by configuring a target field for each panel, each panel performs rate matching according to the target field when transmitting a data portion of PUSCH, so as to avoid interference between a DMRS of one PUSCH and a data portion of another PUSCH.

Fig. 21 shows a block diagram of a configuration apparatus for a demodulation reference signal DMRS according to an exemplary embodiment of the present application, where the apparatus may be implemented as a terminal or as a part of a terminal, and the apparatus includes:

a receiving module 501, configured to receive configuration information of a demodulation reference signal DMRS of an uplink shared channel PUSCH sent by an access network device;

In an alternative embodiment, the two antenna panels include a first antenna panel and a second antenna panel;

the configuration information of the DMRS is used to configure a first DMRS of a first PUSCH transmitted through the first antenna panel to correspond to a first code division multiplexing CDM group or a first CDM group set, and a second DMRS of a second PUSCH transmitted through the second antenna panel to correspond to a second CDM group or a second CDM group set.

In an alternative embodiment, no DMRS port belonging to the same CDM group exists in a first DMRS port/port group corresponding to the first DMRS and a second DMRS port/port group corresponding to the second DMRS;

wherein, the absence of DMRS ports belonging to the same CDM group in the first DMRS port/port group corresponding to the first DMRS and the second DMRS port/port group corresponding to the second DMRS includes at least one of the following cases:

the first CDM group and the second CDM group are different CDM groups, the first CDM group set does not include the second CDM group, the second CDM group set does not include the first CDM group, and the first CDM group set and the second CDM group set do not include the same CDM group.

In an optional embodiment, the configuration information of the DMRS includes first configuration information of a first DMRS corresponding to a first PUSCH transmitted by the first antenna panel and second configuration information of a second DMRS corresponding to a second PUSCH transmitted by the second antenna panel, respectively;

at least one configuration of the DMRS mapping type, the DMRS configuration type and the single-double symbol number configuration in the first configuration information and the second configuration information is different, or the position of the first DMRS symbol indicated by the first configuration information in the time slot is different from the position of the first DMRS symbol indicated by the second configuration information.

In an alternative embodiment, the absence of DMRS ports belonging to the same CDM group in the first DMRS port/port group corresponding to the first DMRS and the second DMRS port/port group corresponding to the second DMRS is adapted to: the first antenna panel and the second antenna panel respectively send scenes of respective PUSCHs to the same transmission receiving point TRP.

In an alternative embodiment, the absence of DMRS ports belonging to the same CDM group in the first DMRS port/port group corresponding to the first DMRS and the second DMRS port/port group corresponding to the second DMRS is adapted to: the first antenna panel and the second antenna panel respectively transmit scenes of respective PUSCH to different TRPs.

In an alternative embodiment, at least one DMRS port in a first DMRS port/port group corresponding to the first DMRS and a second DMRS port/port group corresponding to the second DMRS belong to the same CDM group;

wherein, existence of at least one DMRS port belonging to the same CDM group in the first DMRS port/port group corresponding to the first DMRS and the second DMRS port/port group corresponding to the second DMRS includes at least one of the following cases:

the first CDM group and the second CDM group are the same CDM group, the first CDM group set includes the second CDM group, the second CDM group set includes the first CDM group, and the first CDM group set and the second CDM group set include at least one same CDM group.

In an optional embodiment, the configuration information of the DMRS includes first configuration information of a first DMRS corresponding to a first PUSCH transmitted by the first antenna panel and second configuration information of a second DMRS corresponding to a second PUSCH transmitted by the second antenna panel;

the first configuration information is the same as the DMRS mapping type, the DMRS configuration type and the single-double symbol number configuration in the second configuration information, and the first configuration information is the same as the position of the first DMRS symbol in the time slot indicated by the second configuration information.

In an alternative embodiment, the presence of at least one DMRS port in the first DMRS port/port group corresponding to the first DMRS and the second DMRS port/port group corresponding to the second DMRS belonging to the same CDM group is adapted to: the first antenna panel and the second antenna panel transmit PUSCH to different TRPs.

the receiving module 501 is configured to receive, by using the first antenna panel, first downlink control information DCI, where the first DCI is used to schedule the first antenna panel to send a first PUSCH at a first transmission occasion;

The receiving module 501 is configured to receive a second DCI through the second antenna panel, where the second DCI is used to schedule the second antenna panel to send a second PUSCH at a second transmission occasion;

wherein, the first transmission opportunity and the second transmission opportunity have partially overlapped or completely overlapped time-frequency resources.

In an alternative embodiment, the configuration information of the DMRS is further used for rate matching of PUSCH data portions of the two antenna panels; the configuration information of the DMRS includes a target field for indicating a CDM group that is not multiplexed with a data portion of PUSCH transmission.

In an alternative embodiment, the receiving module 501 is configured to receive, through the first antenna panel, a first target field sent by an access network device, where code point corresponding information of the first target field is used to indicate that a time-frequency resource corresponding to the second CDM group/the second CDM group set is not able to be multiplexed with a data portion of PUSCH transmission;

and/or receiving, by the second antenna panel, a second target field sent by the access network device, where code point corresponding information of the second target field is used to indicate that a time-frequency resource corresponding to the first CDM group/first CDM group set is not able to be multiplexed with a data portion of PUSCH transmission.

In an alternative embodiment, the first target field and/or the second target field is a non-reusable CDM group field in an antenna port domain.

In an alternative embodiment, the apparatus further comprises:

a rate matching module 502, configured to perform rate matching of the data portion of the first PUSCH according to the code point of the first target field;

and/or the number of the groups of groups,

the rate matching module 502 is configured to perform rate matching of the data portion of the second PUSCH according to the code point of the second target field.

Fig. 22 shows a block diagram of a configuration apparatus for a demodulation reference signal DMRS according to an exemplary embodiment of the present application, where the apparatus may be implemented as an access network device or as a part of an access network device, and the apparatus includes:

a sending module 503, configured to send configuration information of a demodulation reference signal DMRS of an uplink shared channel PUSCH to a terminal;

In an alternative embodiment, the at most two antenna panels comprise a first antenna panel and a second antenna panel;

the sending module 503 is configured to send first downlink control information DCI to the first antenna panel, where the first DCI is used to schedule the first antenna panel to send a first PUSCH at a first transmission occasion;

and/or transmitting a second DCI to the second antenna panel, where the second DCI is used to schedule the second antenna panel to transmit a second PUSCH at a second transmission occasion;

In an alternative embodiment, the configuration information of the DMRS is further used for rate matching of PUSCH data portions of the at most two antenna panels; the configuration information of the DMRS includes a target field for indicating a CDM group that is not multiplexed with a data portion of PUSCH transmission.

In an alternative embodiment, the sending module 503 is configured to send a first target field to the first antenna panel, where code point corresponding information of the first target field is used to indicate that time-frequency resources corresponding to the second CDM group/the second CDM group set are not able to be multiplexed with a data portion of PUSCH transmission;

And/or transmitting a second target field to the second antenna panel, where code point corresponding information of the second target field is used to indicate that the time-frequency resource corresponding to the first CDM group is not able to be multiplexed with the data portion of PUSCH transmission.

In an alternative embodiment, the code point of the first target field is used to perform rate matching of the data portion of the first PUSCH;

and/or the number of the groups of groups,

the code point of the second target field is used to perform rate matching of the data portion of the second PUSCH.

Fig. 23 shows a schematic structural diagram of a communication device (terminal or network device) according to an exemplary embodiment of the present application, where the communication device includes: a processor 101, a receiver 102, a transmitter 103, a memory 104, and a bus 105.

The processor 101 includes one or more processing cores, and the processor 101 executes various functional applications and information processing by running software programs and modules.

The receiver 102 and the transmitter 103 may be implemented as one communication component, which may be a communication chip.

The memory 104 is connected to the processor 101 via a bus 105.

The memory 104 may be used to store at least one instruction that the processor 101 is configured to execute to implement the various steps of the method embodiments described above.

Further, the memory 104 may be implemented by any type of volatile or nonvolatile storage device or combination thereof, including but not limited to: magnetic or optical disks, electrically erasable programmable Read-Only Memory (EEPROM), erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), static random access Memory (Static Random Access Memory, SRAM), read-Only Memory (ROM), magnetic Memory, flash Memory, programmable Read-Only Memory (Programmable Read-Only Memory, PROM).

When the communication device is implemented as a terminal, the processor and the transceiver in the communication device according to the embodiments of the present application may execute steps executed by the terminal in any of the methods shown above, which are not described herein again.

In one possible implementation, when the communication device is implemented as a terminal,

When the communication device is implemented as a network device, the processor and the transceiver in the communication device according to the embodiments of the present application may execute the steps executed by the network device in any of the methods shown in the foregoing, which are not described herein again.

In one possible implementation, when the communication device is implemented as a network device,

In an exemplary embodiment, there is also provided a computer readable storage medium having stored therein at least one instruction, at least one program, a code set, or an instruction set, which is loaded and executed by a processor to implement the method for configuring a demodulation reference signal DMRS performed by a communication device provided in the above respective method embodiments.

In an exemplary embodiment, a chip is also provided, where the chip includes programmable logic circuits and/or program instructions, and when the chip is run on a computer device, the method for configuring the demodulation reference signal DMRS in the above aspect is implemented.

In an exemplary embodiment, a computer program product is also provided, which, when run on a processor of a computer device, causes the computer device to perform the method of configuring demodulation reference signals, DMRS, as described in the above aspect.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program for instructing relevant hardware, where the program may be stored in a computer readable storage medium, and the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The foregoing description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, since it is intended that all modifications, equivalents, improvements, etc. that fall within the spirit and scope of the invention.

Claims

A method for configuring a demodulation reference signal DMRS, wherein the method is performed by a terminal, the method comprising:

receiving configuration information of a demodulation reference signal (DMRS) of an uplink shared channel (PUSCH) sent by access network equipment;

under a transmission configuration that a plurality of Downlink Control Information (DCI) scheduling terminals perform uplink simultaneous transmission (STxMP) based on two antenna panels, the configuration information of the DMRS is used for indicating the terminals to respectively send the DMRS corresponding to the PUSCH through the two antenna panels according to the configuration information.
The method of claim 1, wherein the two antenna panels comprise a first antenna panel and a second antenna panel;

the configuration information of the DMRS is used to configure a first DMRS of a first PUSCH transmitted through the first antenna panel to correspond to a first code division multiplexing CDM group or a first CDM group set, and a second DMRS of a second PUSCH transmitted through the second antenna panel to correspond to a second CDM group or a second CDM group set.
The method of claim 2, wherein no DMRS ports belonging to the same CDM group exist in a first DMRS port/port group corresponding to the first DMRS and a second DMRS port/port group corresponding to the second DMRS;

wherein, the absence of DMRS ports belonging to the same CDM group in the first DMRS port/port group corresponding to the first DMRS and the second DMRS port/port group corresponding to the second DMRS includes at least one of the following cases:

the first CDM group and the second CDM group are different CDM groups, the first CDM group set does not include the second CDM group, the second CDM group set does not include the first CDM group, and the first CDM group set and the second CDM group set do not include the same CDM group.
The method of claim 3, wherein the configuration information of the DMRS includes first configuration information of a first DMRS corresponding to a first PUSCH transmitted by the first antenna panel and second configuration information of a second DMRS corresponding to a second PUSCH transmitted by the second antenna panel, respectively;

at least one configuration of the DMRS mapping type, the DMRS configuration type and the single-double symbol number configuration in the first configuration information and the second configuration information is different, or the position of the first DMRS symbol indicated by the first configuration information in the time slot is different from the position of the first DMRS symbol indicated by the second configuration information.
The method of claim 3, wherein the absence of DMRS ports belonging to the same CDM group from the first DMRS port/port group corresponding to the first DMRS and the second DMRS port/port group corresponding to the second DMRS is adapted to: the first antenna panel and the second antenna panel respectively send scenes of respective PUSCHs to the same transmission receiving point TRP.
The method of claim 3, wherein the absence of DMRS ports belonging to the same CDM group from the first DMRS port/port group corresponding to the first DMRS and the second DMRS port/port group corresponding to the second DMRS is adapted to: the first antenna panel and the second antenna panel respectively transmit scenes of respective PUSCH to different TRPs.
The method of claim 2, wherein at least one DMRS port in a first DMRS port/port group corresponding to the first DMRS and a second DMRS port/port group corresponding to the second DMRS belong to the same CDM group;

wherein, existence of at least one DMRS port belonging to the same CDM group in the first DMRS port/port group corresponding to the first DMRS and the second DMRS port/port group corresponding to the second DMRS includes at least one of the following cases:

The first CDM group and the second CDM group are the same CDM group, the first CDM group set includes the second CDM group, the second CDM group set includes the first CDM group, and the first CDM group set and the second CDM group set include at least one same CDM group.
The method of claim 7, wherein the configuration information for the DMRS comprises first configuration information for a first DMRS corresponding to a first PUSCH transmitted by the first antenna panel and second configuration information for a second DMRS corresponding to a second PUSCH transmitted by the second antenna panel;

the first configuration information is the same as the DMRS mapping type, the DMRS configuration type and the single-double symbol number configuration in the second configuration information, and the first configuration information is the same as the position of the first DMRS symbol in the time slot indicated by the second configuration information.
The method of claim 7, wherein the presence of at least one DMRS port in a first DMRS port/port group corresponding to the first DMRS and a second DMRS port/port group corresponding to the second DMRS belonging to the same CDM group is adapted for: the first antenna panel and the second antenna panel transmit PUSCH to different TRPs.
The method of any one of claims 1 to 9, wherein the two antenna panels comprise a first antenna panel and a second antenna panel;

the method further comprises the steps of:

receiving first Downlink Control Information (DCI) through the first antenna panel, wherein the first DCI is used for scheduling the first antenna panel to send a first PUSCH at a first transmission time;

receiving a second DCI through the second antenna panel, where the second DCI is used to schedule the second antenna panel to send a second PUSCH at a second transmission occasion;

wherein, the first transmission opportunity and the second transmission opportunity have partially overlapped or completely overlapped time-frequency resources.
The method of any of claims 1 to 10, wherein the configuration information of the DMRS is further used for rate matching of PUSCH data portions of the two antenna panels; the configuration information of the DMRS includes a target field for indicating a CDM group that is not multiplexed with a data portion of PUSCH transmission.
The method according to any one of claims 1 to 10, further comprising:

receiving, by a first antenna panel, a first target field sent by an access network device, where code point corresponding information of the first target field is used to indicate that a time-frequency resource corresponding to a second CDM group/a second CDM group set is not able to be multiplexed with a data portion of PUSCH transmission;

And/or receiving, by the second antenna panel, a second target field sent by the access network device, where code point corresponding information of the second target field is used to indicate that a time-frequency resource corresponding to the first CDM group/the first CDM group set is not able to be multiplexed with a data portion of PUSCH transmission.
The method of claim 12, wherein the first target field and/or the second target field is a non-reusable CDM group field in an antenna port field.
The method according to claim 12 or 13, characterized in that the method further comprises:

performing rate matching of the data portion of the first PUSCH according to the code point of the first target field;

and/or the number of the groups of groups,

and performing rate matching of the data part of the second PUSCH according to the code point of the second target field.
A method for configuring a demodulation reference signal DMRS, wherein the method is performed by an access network device, the method comprising:

transmitting configuration information of a demodulation reference signal (DMRS) of an uplink shared channel (PUSCH) to a terminal;

under a transmission configuration that a plurality of Downlink Control Information (DCI) scheduling terminals perform uplink simultaneous transmission (STxMP) based on two antenna panels, the configuration information of the DMRS is used for indicating the terminals to respectively send the DMRS corresponding to the PUSCH through the two antenna panels according to the configuration information.
The method of claim 15, wherein the two antenna panels comprise a first antenna panel and a second antenna panel;

the configuration information of the DMRS is used to configure a first DMRS of a first PUSCH transmitted through the first antenna panel to correspond to a first code division multiplexing CDM group or a first CDM group set, and a second DMRS of a second PUSCH transmitted through the second antenna panel to correspond to a second CDM group or a second CDM group set.
The method of claim 16, wherein no DMRS ports belonging to the same CDM group exist in a first DMRS port/port group corresponding to the first DMRS and a second DMRS port/port group corresponding to the second DMRS;

wherein, the absence of DMRS ports belonging to the same CDM group in the first DMRS port/port group corresponding to the first DMRS and the second DMRS port/port group corresponding to the second DMRS includes at least one of the following cases:

the first CDM group and the second CDM group are different CDM groups, the first CDM group set does not include the second CDM group, the second CDM group set does not include the first CDM group, and the first CDM group set and the second CDM group set do not include the same CDM group.
The method of claim 17, wherein the configuration information of the DMRS includes first configuration information of a first DMRS corresponding to a first PUSCH transmitted by the first antenna panel and second configuration information of a second DMRS corresponding to a second PUSCH transmitted by the second antenna panel, respectively;

at least one configuration of the DMRS mapping type, the DMRS configuration type and the single-double symbol number configuration in the first configuration information and the second configuration information is different, or the position of the first DMRS symbol indicated by the first configuration information in the time slot is different from the position of the first DMRS symbol indicated by the second configuration information.
The method of claim 17, wherein the absence of DMRS ports belonging to the same CDM group from the first DMRS port/port group corresponding to the first DMRS and the second DMRS port/port group corresponding to the second DMRS is adapted to: the first antenna panel and the second antenna panel respectively send scenes of respective PUSCHs to the same transmission receiving point TRP.
The method of claim 17, wherein the absence of DMRS ports belonging to the same CDM group from the first DMRS port/port group corresponding to the first DMRS and the second DMRS port/port group corresponding to the second DMRS is adapted to: the first antenna panel and the second antenna panel respectively transmit scenes of respective PUSCH to different TRPs.
The method of claim 16, wherein at least one DMRS port in a first DMRS port/port group corresponding to the first DMRS and a second DMRS port/port group corresponding to the second DMRS belong to the same CDM group;

wherein, existence of at least one DMRS port belonging to the same CDM group in the first DMRS port/port group corresponding to the first DMRS and the second DMRS port/port group corresponding to the second DMRS includes at least one of the following cases:

the first CDM group and the second CDM group are the same CDM group, the first CDM group set includes the second CDM group, the second CDM group set includes the first CDM group, and the first CDM group set and the second CDM group set include at least one same CDM group.
The method of claim 21, wherein the configuration information for the DMRS comprises first configuration information for a first DMRS corresponding to a first PUSCH transmitted by the first antenna panel and second configuration information for a second DMRS corresponding to a second PUSCH transmitted by the second antenna panel;

the first configuration information is the same as the DMRS mapping type, the DMRS configuration type and the single-double symbol number configuration in the second configuration information, and the first configuration information is the same as the position of the first DMRS symbol in the time slot indicated by the second configuration information.
The method of claim 21, wherein the presence of at least one DMRS port in a first DMRS port/port group corresponding to the first DMRS and a second DMRS port/port group corresponding to the second DMRS belonging to the same CDM group is applicable to: the first antenna panel and the second antenna panel transmit PUSCH to different TRPs.
The method of any one of claims 15 to 23, wherein the two antenna panels comprise a first antenna panel and a second antenna panel;

the method further comprises the steps of:

transmitting first Downlink Control Information (DCI) to the first antenna panel, wherein the first DCI is used for scheduling the first antenna panel to transmit a first PUSCH at a first transmission time;

and/or transmitting a second DCI to the second antenna panel, where the second DCI is used to schedule the second antenna panel to transmit a second PUSCH at a second transmission occasion;

wherein, the first transmission opportunity and the second transmission opportunity have partially overlapped or completely overlapped time-frequency resources.
The method of any of claims 15 to 24, wherein the configuration information of the DMRS is further used for rate matching of PUSCH data portions of the two antenna panels; the configuration information of the DMRS includes a target field for indicating a CDM group that is not multiplexed with a data portion of PUSCH transmission.
The method according to any one of claims 15 to 24, further comprising:

transmitting a first target field to a first antenna panel, wherein code point corresponding information of the first target field is used for indicating that time-frequency resources corresponding to a second CDM group/a second CDM group set are not multiplexed with a data part of PUSCH transmission;

and/or transmitting a second target field to the second antenna panel, where code point corresponding information of the second target field is used to indicate that the first CDM group/the time-frequency resource corresponding to the first CDM group set is not multiplexed with the data portion of PUSCH transmission.
The method of claim 26, wherein the first target field and/or the second target field is a non-reusable CDM group field in an antenna port field.
The method according to claim 26 or 27, wherein the code point of the first target field is used to perform rate matching of the data portion of the first PUSCH;

and/or the number of the groups of groups,

the code point of the second target field is used to perform rate matching of the data portion of the second PUSCH.
A configuration apparatus for a demodulation reference signal DMRS, wherein the apparatus includes:

a receiving module, configured to receive configuration information of a demodulation reference signal DMRS of an uplink shared channel PUSCH sent by an access network device;

Under a transmission configuration that a plurality of Downlink Control Information (DCI) scheduling terminals perform uplink simultaneous transmission (STxMP) based on two antenna panels, the configuration information of the DMRS is used for indicating the terminals to respectively send the DMRS corresponding to the PUSCH through the two antenna panels according to the configuration information.
A configuration apparatus for a demodulation reference signal DMRS, wherein the apparatus is executed by an access network device, the apparatus includes:

a sending module, configured to send configuration information of a demodulation reference signal DMRS of an uplink shared channel PUSCH to a terminal;

under a transmission configuration that a plurality of Downlink Control Information (DCI) scheduling terminals perform uplink simultaneous transmission (STxMP) based on two antenna panels, the configuration information of the DMRS is used for indicating the terminals to respectively send the DMRS corresponding to the PUSCH through the two antenna panels according to the configuration information.
A terminal, the terminal comprising: a processor and a transceiver coupled to the processor; wherein,

the transceiver is configured to receive configuration information of a demodulation reference signal DMRS of an uplink shared channel PUSCH sent by the access network device;

under a transmission configuration that a plurality of Downlink Control Information (DCI) scheduling terminals perform uplink simultaneous transmission (STxMP) based on two antenna panels, the configuration information of the DMRS is used for indicating the terminals to respectively send the DMRS corresponding to the PUSCH through the two antenna panels according to the configuration information.
A network device, the network device comprising: a processor and a transceiver coupled to the processor; wherein,

the transceiver is configured to send configuration information of a demodulation reference signal DMRS of an uplink shared channel PUSCH to a terminal;

under a transmission configuration that a plurality of Downlink Control Information (DCI) scheduling terminals perform uplink simultaneous transmission (STxMP) based on two antenna panels, the configuration information of the DMRS is used for indicating the terminals to respectively send the DMRS corresponding to the PUSCH through the two antenna panels according to the configuration information.
A computer readable storage medium, wherein executable instructions are stored in the readable storage medium, the executable instructions being loaded and executed by a processor to implement the method for configuring a demodulation reference signal DMRS according to any one of claims 1 to 28.
A chip comprising programmable logic circuits or programs, the chip being configured to implement the method for configuring demodulation reference signals DMRS according to any one of claims 1 to 28.