Method, apparatus and device for configuring demodulation reference signal (DMRS) and medium

Abstract

The application discloses a method, device, equipment and medium for configuring a demodulation reference signal (DMRS), and relates to the field of wireless communication. The method is applied to a terminal, and the method comprises the following steps: receiving configuration information of a demodulation reference signal (DMRS) of an uplink shared channel (PUSCH) sent by an access network device; wherein, in a transmission configuration in which the terminal performs uplink simultaneous transmission (STxMP) based on two antenna panels and the uplink simultaneous transmission (STxMP) is scheduled by multiple downlink control information (DCI), the configuration information of the DMRS is used for instructing the terminal to respectively send the DMRS corresponding to the PUSCH by the two antenna panels according to the configuration information. The method can configure the DMRS corresponding to the PUSCH sent by the two panels respectively when multiple DCI schedules multiple panel uplink simultaneous transmission.

Description

Technical Field

[0001] This application relates to the field of wireless communication, and in particular to a method, apparatus, device and medium for configuring a demodulation reference signal (DMRS). Background Technology

[0002] In the 3GPP (3rd Generation Partnership Project) R18 (Release 18) uplink MIMO (Multiple Input Multiple Output) enhancement, it is considered to achieve simultaneous uplink transmission to multiple TRPs (Transmit / Receive Points) through multiple panels (antenna panels) of the terminal, in order to further improve the uplink throughput and transmission reliability.

[0003] In Release 18, when a terminal sends different PUSCHs (Physical Uplink Shared Channels) from different panels that are time-domain fully / partially overlapping and frequency-domain fully / partially / non-overlapping, the DMRS of one PUSCH may interfere with the DMRS (Demodulation Reference Signal) of another PUSCH. Summary of the Invention

[0004] This application provides a method, apparatus, device, and medium for configuring a demodulation reference signal (DMRS), which allows for configuring the DMRS corresponding to the PUSCH transmitted by two panels separately when multiple DCI schedulers transmit uplinks simultaneously. The technical solution is as follows:

[0005] According to one aspect of this application, a method for configuring a demodulation reference signal (DMRS) is provided, applied in a terminal, the method comprising:

[0006] Receive configuration information of the demodulation reference signal DMRS for the uplink shared channel (PUSCH) sent by the access network equipment;

[0007] In the transmission configuration where multiple downlink control information (DCI) scheduling terminals transmit STxMP uplink simultaneously based on up to two antenna panels, the DMRS configuration information is used to instruct the terminal to send the corresponding PUSCH DMRS through the up to two antenna panels according to the configuration information.

[0008] According to one aspect of this application, a method for configuring a demodulation reference signal (DMRS) is provided, applied in an access network device, the method comprising:

[0009] Send configuration information of the demodulation reference signal DMRS for the uplink shared channel PUSCH to the terminal;

[0010] In the transmission configuration where multiple downlink control information (DCI) scheduling terminals transmit STxMP uplink simultaneously based on up to two antenna panels, the DMRS configuration information is used to instruct the terminal to send the corresponding PUSCH DMRS through the up to two antenna panels according to the configuration information.

[0011] According to one aspect of this application, a configuration apparatus for a demodulation reference signal (DMRS) is provided, the apparatus comprising:

[0012] The transmitting module is used to send configuration information of the demodulation reference signal DMRS of the uplink shared channel PUSCH to the terminal;

[0013] In the transmission configuration where multiple downlink control information (DCI) scheduling terminals simultaneously transmit STxMP uplink based on two antenna panels, the DMRS configuration information is used to instruct the terminal to send the corresponding PUSCH DMRS through the two antenna panels according to the configuration information.

[0014] According to one aspect of this application, a configuration apparatus for a demodulation reference signal (DMRS) is provided, the apparatus comprising:

[0015] The transmitting module is used to send configuration information of the maximum transmit power to the terminal. This configuration information is used to determine the maximum transmit power P of each antenna panel when the terminal transmits uplink from two antenna panels simultaneously using multi-downlink control information (DCI) to schedule simultaneous STxMP transmission from multiple antenna panels. CMAX，P ;

[0016] The terminal includes multiple antenna panels, and the terminal supports simultaneous uplink transmission from multiple antenna panels.

[0017] According to one aspect of this application, a terminal is provided, the terminal comprising: a processor and a transceiver connected to the processor; wherein,

[0018] The transceiver is used to receive configuration information of the demodulation reference signal DMRS of the uplink shared channel PUSCH sent by the access network device;

[0019] In the transmission configuration where multiple downlink control information (DCI) scheduling terminals simultaneously transmit STxMP uplink based on two antenna panels, the DMRS configuration information is used to instruct the terminal to send the corresponding PUSCH DMRS through the two antenna panels according to the configuration information.

[0020] According to one aspect of this application, a network device is provided, the network device comprising: a processor and a transceiver connected to the processor; wherein,

[0021] The transceiver is used to send configuration information of the demodulation reference signal DMRS of the uplink shared channel PUSCH to the terminal.

[0022] In the transmission configuration where multiple downlink control information (DCI) scheduling terminals simultaneously transmit STxMP uplink based on two antenna panels, the DMRS configuration information is used to instruct the terminal to send the corresponding PUSCH DMRS through the two antenna panels according to the configuration information.

[0023] According to one aspect of this application, a computer-readable storage medium is provided, wherein executable instructions are stored therein, which are loaded and executed by a processor to implement the configuration method of the demodulation reference signal DMRS as described above.

[0024] According to one aspect of the embodiments of this application, a chip is provided, the chip including programmable logic circuits and / or program instructions, which, when the chip is run on a computer device, are used to implement the configuration method of the demodulation reference signal DMRS described above.

[0025] According to one aspect of this application, a computer program product is provided that, when run on a processor of a computer device, causes the computer device to perform the configuration method for the demodulation reference signal DMRS described in the above aspect.

[0026] The technical solutions provided in this application have at least the following beneficial effects:

[0027] Access network equipment configures the DMRS configuration information of PUSCH for terminal equipment. When the access network equipment schedules two panels of the terminal equipment to send PUSCH simultaneously through multiple DCIs, the terminal equipment sends the DMRS of PUSCH from the two panels respectively according to the DMRS configuration information, realizing the separate configuration of the two DMRS sent by the two panels. The access network equipment can avoid interference between the two DMRS by configuring the two DMRS on different time-frequency resources or code domains, thereby improving the performance of the access network equipment in receiving DMRS and performing channel estimation based on DMRS. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of a system architecture provided in an exemplary embodiment of this application;

[0030] Figure 2 This is a schematic diagram of a single DCI scheduling provided in an exemplary embodiment of this application;

[0031] Figure 3 This is a schematic diagram of multi-DCI scheduling provided in an exemplary embodiment of this application;

[0032] Figure 4 This is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of this application;

[0033] Figure 5 This is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of this application;

[0034] Figure 6 This is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of this application;

[0035] Figure 7 This is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of this application;

[0036] Figure 8 This is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of this application;

[0037] Figure 9 This is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of this application;

[0038] Figure 10 This is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of this application;

[0039] Figure 11 This is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of this application;

[0040] Figure 12 This is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of this application;

[0041] Figure 13 This is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of this application;

[0042] Figure 14 This is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of this application;

[0043] Figure 15 This is a flowchart of a DMRS configuration method provided in an exemplary embodiment of this application;

[0044] Figure 16 This is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of this application;

[0045] Figure 17 This is a schematic diagram of a DMRS configuration method provided in an exemplary embodiment of this application;

[0046] Figure 18 This is a flowchart of a DMRS configuration method provided in an exemplary embodiment of this application;

[0047] Figure 19 This is a flowchart of a DMRS configuration method provided in an exemplary embodiment of this application;

[0048] Figure 20 This is a flowchart of a DMRS configuration method provided in an exemplary embodiment of this application;

[0049] Figure 21 This is a structural block diagram of a DMRS configuration apparatus provided in an exemplary embodiment of this application;

[0050] Figure 22 This is a structural block diagram of a DMRS configuration apparatus provided in an exemplary embodiment of this application;

[0051] Figure 23 This is a schematic diagram of the structure of a communication device provided in an exemplary embodiment of this application. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0053] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0054] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0055] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0056] See Figure 1 The technical solution provided in this application is applied to a communication system, which includes a network device 11 and a terminal 10.

[0057] Network device 11 is a device that provides wireless communication functionality for the terminal. Exemplarily, network device can also be referred to as access network device. Network device 11 includes, but is not limited to: gNB in ​​5G, Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home evolved Node B, or Home Node B, HNB), Base Band Unit (BBU), Transmitting and Receiving Point (TRP), Transmitting Point (TP), Mobile Switching Center, etc. The network device in this application can also be a device providing wireless communication functionality for the terminal in other communication systems that may emerge in the future. As communication technologies evolve, the term "network device" may change. For ease of description, in the embodiments of this application, the above-mentioned devices providing wireless communication functionality for terminal 10 are collectively referred to as network devices.

[0058] In this application's embodiments, the TRP can refer to any component (or set of components) used to provide wireless access to a network, such as a macro cell, femtocell, Wi-Fi access point (AP), or other device supporting wireless communication. The TRP can provide wireless access according to one or more wireless communication protocols, such as 5G (5G New Generation) radio. th Generation New Radio (5GNR), Long Term Evolution (LTE), LTE Adcanced (LTE-A), High Speed ​​Packet Access (HSPA), Wi-Fi 802.11a / b / g / n / ac, etc.

[0059] For example, an access network device may deploy one or more TRPs. For instance, an access network device may have a first TRP and a second TRP. Alternatively, a first access network device may have a first TRP, and a second access network device may have a second TRP.

[0060] Terminal 10 is a device that can provide voice and / or data connectivity to a user. For example, terminals include handheld devices with wireless communication capabilities, in-vehicle devices, etc. Currently, terminals can be: mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving vehicles, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, or wireless terminals in smart homes, in-vehicle devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE), mobile stations (MS), etc.

[0061] It should be noted that the above system architecture is merely an example illustrating the system architecture applicable to the embodiments of this application. The system architecture applicable to the embodiments of this application is different from that of the traditional system architecture. Figure 1 The system architecture shown can also add other entities or remove some entities.

[0062] Optionally, the terminal has multiple panels, and the terminal supports simultaneous transmission on multiple panels. Multiple panels can perform uplink or downlink transmission simultaneously. For example, the terminal has two panels, and the two panels send uplink channels / uplink signals to two different TRPs respectively. Generally speaking, the orientation of multiple panels is quite different, so the uplink spatial relationship information (SpatialRelationInfo) or TCI state corresponding to the uplink PUSCH transmission of multiple panels will be different.

[0063] For example, a network device 11 deploys one or more TRPs, such as TRP1 and TRP2. Terminals use different panels to transmit beams in different directions. The terminals use different transmit beams to repeatedly transmit uplink channels to different TRPs. Network device 11 receives the repeated uplink channel transmissions from the terminals through multiple TRPs. For example, because different TRPs are located at different relative positions to the terminals, the terminals need to use transmit beams with different beam directions to transmit beams to the corresponding TRPs to repeatedly transmit uplink channels.

[0064] The technical solutions of this disclosure can be applied to various communication systems, such as: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, evolution of NR system, LTE-based access to Unlicensed spectrum (LTE-U) system, NR-U system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, and Wireless Local Area Network (WLAN). Networks (WLAN), Wireless Fidelity (WiFi), next-generation communication systems, or other communication systems.

[0065] The following is an explanation of the relevant terms used in this application:

[0066] Multiple TRP transmissions:

[0067] To improve coverage at cell edges and provide a more balanced quality of service within the service area, multi-point collaboration remains an important technical approach in NR systems. From a network architecture perspective, deploying the network with a large number of distributed access points and centralized baseband processing is more conducive to providing a balanced user experience rate and significantly reducing latency and signaling overhead caused by handover. As the frequency band increases, a relatively dense deployment of access points is also required to ensure network coverage. In the high-frequency band, with the increasing integration of active antenna equipment, modular active antenna arrays are becoming more popular. Each TRP's antenna array can be divided into several relatively independent antenna panels, so the overall array shape and number of ports can be flexibly adjusted according to the deployment scenario and service requirements. Antenna panels or TRPs can also be connected by optical fibers for more flexible distributed deployment. In the millimeter-wave band, as the wavelength decreases, the obstruction effect caused by obstacles such as people or vehicles becomes more significant. In this case, to ensure the robustness of link connections, collaboration between multiple TRPs or antenna panels can be used to transmit / receive from multiple angles and multiple beams, thereby reducing the adverse effects of obstruction.

[0068] Based on the mapping relationship between the transmitted signal stream and multiple TRPs / antenna panels, multi-point cooperative transmission technology can be divided into coherent and incoherent transmission. In coherent transmission, each data layer is mapped to multiple TRPs / antenna panels through a weighted vector. In incoherent transmission, each data stream is mapped to only a portion of the TRPs / antenna panels. Coherent transmission places higher demands on the synchronization between transmission points and the transmission capacity of the backhaul link, making it more sensitive to many non-ideal factors in real-world deployment conditions. In contrast, incoherent transmission is less affected by these factors and is therefore a preferred solution for multi-point transmission technology.

[0069] It should be noted that research and standardization work on M-TRP (Multi-TRP) was not fully developed in NR Release 15. Release 16 mainly focused on the standardization of PDSCH (Physical Downlink Shared Channel). Release 17 enhanced the standardization of MTRP for PUSCH / PUCCH (Physical Uplink Control Channel), but only standardized the TDM (Time Division Multiplexing) transmission scheme. Currently, Release 18 considers enhancing the simultaneous transmission of PUSCH / PUCCH based on multi-panel terminal MTRP.

[0070] QCL (Quasi Co-Location):

[0071] Quasi-co-located (QCL) refers to the idea that the large-scale parameters of the channel experienced by a symbol at one antenna port can be inferred from the channel experienced by a symbol at another antenna port. These large-scale parameters can include delay spread, average delay, Doppler spread, Doppler offset, average gain, and spatial reception parameters.

[0072] The concept of QCL (Quick Channel Coordination) was introduced with the advent of Coordinated Multiple Point Transmission (CoMP) technology. The multiple stations involved in CoMP transmission may correspond to geographically different sites or sectors with varying antenna panel orientations. For example, when a terminal receives data from different sites, the spatial differences between these sites lead to variations in large-scale channel parameters of the receiving link, such as Doppler frequency offset and delay spread. These large-scale channel parameters directly affect the adjustment and optimization of filter coefficients during channel estimation. Different channel estimation filter parameters should be used to adapt to the corresponding channel propagation characteristics, corresponding to signals emitted from different sites.

[0073] Therefore, although the differences in spatial location or angle between various sites are transparent to the UE and the CoMP operation itself, the impact of these spatial differences on large-scale channel parameters is an important factor that the UE needs to consider when performing channel estimation and reception detection. The so-called QCL (Quasi-Co-location) of two antenna ports under certain large-scale parameters means that these large-scale parameters of the two ports are the same. In other words, as long as certain large-scale parameters of the two ports are consistent, regardless of whether their actual physical locations or the orientation of their corresponding antenna panels differ, the terminal can consider that the two ports originate from the same location (i.e., quasi-co-located).

[0074] For some typical application scenarios, considering the possible QCL relationships between various reference signals, and from the perspective of simplifying signaling, NR classifies several large-scale channel parameters into the following four types to facilitate system configuration / indication according to different scenarios:

[0075] • QCL-TypeA: {Doppler frequency shift, Doppler spread, average delay, delay spread}.

[0076] Apart from the space receiving parameters, all other large-scale parameters are the same.

[0077] For frequency bands below 6 GHz, spatial reception parameters may not be required.

[0078] • QCL-TypeB: {Doppler frequency shift, Doppler extension}.

[0079] This applies only to frequency bands below 6 GHz.

[0080] • QCL-TypeC (Type C): {Doppler frequency shift, average delay}.

[0081] • QCL-TypeD (Type D): {Spatial Receive Parameters}.

[0082] Primarily targeting frequency bands above 6GHz.

[0083] Release 17 standardized the transmission of PUSCH (Physical Uplink Shared Channel) from a terminal to multiple base stations' TRPs. It mainly standardized cooperative transmission under the TDM (Time Division Multiplexing) transmission mode, enabling the terminal to send different repetitions of the same information on the PUSCH to different TRPs of the base station through different transmission occupancy (TO) times in the time domain. This method has lower requirements for terminal capabilities, does not require the terminal to support the ability to transmit beams simultaneously, and has a larger transmission delay.

[0084] For uplink transmission, different QCL relationships are distinguished, and spatial relationship information or TCI status is used to represent the reference signal or uplink channel beam direction information.

[0085] For uplink transmission, the spatial characteristics of the channels that the PUSCH channels traverse may differ greatly depending on the TRP. Therefore, it is assumed that the spatial correlation or TCI state of PUSCHs in different transmission directions is different.

[0086] In Release 18 (R18), the goal is to achieve simultaneous cooperative transmission from multiple antenna panels on a terminal to multiple base stations' TRPs (Transmission Points) to increase transmission reliability and throughput, while effectively reducing transmission latency under multiple TRPs. However, this scheme requires the terminal to have the ability to transmit multiple beams simultaneously. PUSCH transmission can be based on multi-panel / TRP transmission scheduled using a single PDCCH (Physical Downlink Control Channel), i.e., multi-panel / TRP transmission scheduled using S-DCI (Single DCI). For example, ... Figure 2As shown, terminal 10 receives PDCCH1 sent by TRP1. PDCCH1 carries DCI1, which includes scheduling information for PUSCH1 and PUSCH2. Based on DCI1, the terminal sends PUSCH1 to TRP1 via panel1, and sends PUSCH2 to TRP2 via panel2 based on DCI1. PUSCH transmission can also be based on multi-panel / TRP transmission using different PDCCHs, i.e., M-DCI (Multi-DCI) scheduling. For example, ... Figure 3 As shown, terminal 10 receives PDCCH1 sent by TRP1 and PDCCH2 sent by TRP2. PDCCH1 carries DCI1, which includes scheduling information for PUSCH1. PDCCH2 carries DCI2, which includes scheduling information for PUSCH2. The terminal sends PUSCH1 to TRP1 via panel1 based on DCI1, and sends PUSCH2 to TRP2 via panel2 based on DCI2.

[0087] In actual deployments, the link between the panel and the TRP may be a relatively ideal backhaul link that supports high throughput and very low backhaul latency, or it may be a non-ideal backhaul link that uses methods such as xDSL (x Digital Subscriber Line), microwave, and relay. The NC-JT (Non-Coherent Joint Transmission) transmission scheme based on M-DCI was initially introduced mainly for non-ideal backhaul situations, but it can also be used for ideal backhaul situations.

[0088] DMRS:

[0089] DMRS or DM-RS (Demodulation Reference Signal) is used for channel estimation and coherent demodulation of physical channels.

[0090] DMRS can be mapped to physical channels such as PBCH, PDCCH, PDSCH, PUCCH, and PUSCH. This application mainly describes DMRS in the PUSCH channel.

[0091] DMRS is a UE-specific reference signal, and its configuration information mainly consists of three parts:

[0092] 1. DMRS mapping type: The mapping type determines the starting position of the DMRS symbol in the time domain.

[0093] 2. DMRS configuration type: The DMRS type, sometimes also called the DMRS configuration type, determines the RE (Resource Element) mapping density of the DMRS in the frequency domain.

[0094] 3. Additional Position of DMRS: DMRS signals can be divided into front-loaded DMRS and rear-loaded DMRS based on their position. The rear-loaded DMRS is the additional position mentioned here. Front-loaded DMRS is mandatory, while rear-loaded DMRS is optional. Rear-loaded DMRS is generally used in medium- and high-speed mobile scenarios to improve the estimation accuracy of time-varying channels by inserting more DMRS pilot symbols in the scheduling time slot. Optionally, a maximum of 3 additional positions can be configured in one time slot.

[0095] 1. DMRS mapping type

[0096] To meet different deployment scenarios, NR defines two different time-domain mapping structures for DMRS: mapping type A and mapping type B. The main difference between these two time-domain structures is the position of the first DMRS symbol.

[0097] Mapping type A

[0098] In the DMRS time-domain structure of mapping type A, the symbol of the first DMRS is located in symbol #2 (symbol 2) or symbol #3 (symbol 3) within the time slot. This mapping method is independent of the starting position of the actual data transmission; instead, it fixes the DMRS at a position relative to the edge of the time slot. Mapping type A is mainly used in scenarios where data transmission occupies most of the symbols in the time slot.

[0099] Figure 4 This is a DMRS mapping of mapping type A, where the first symbol of the DMRS is located in time slot symbol #2.

[0100] Mapping type B

[0101] In the DMRS time-domain structure of mapping type B, the first DMRS symbol is fixedly mapped to the first OFDM symbol of the data transmission resource (PUSCH). In this case, the position of the DMRS is not relative to the start position of the time slot (symbol #0), but rather relative to the start position of the data transmission resource. Mapping type B is mainly used in scenarios where the data transmission PUSCH occupies only a small portion of a time slot, in order to reduce transmission latency.

[0102] Figure 5 It is a DMRS mapping of mapping type B, where the first symbol is located at symbol #8.

[0103] The starting symbol position l0 for mapping type A and mapping type B is specified in the protocol as follows:

[0104] The reference point for l and the position l0 of the first DM-RS symbol depend on the mapping type.

[0105] for PUSCH mapping type A:

[0106] -l is defined relative to the start of the slot.

[0107] -l0 = 3 if the higher-layer parameter dmrs-TypeA-Position is equal to 'pos3' and l0 = 2 otherwise.

[0108] for PUSCH mapping type B:

[0109] -l is defined relative to the start of the scheduled PUSCH resources.

[0110] -l0 = 0.

[0111] That is, (1) if it is mapping type A, then the starting position of DMRS is relative to the starting position of the time slot, and the value depends on the MIB (Master Information Block) message parameter dmrs-TypeA-Position:

[0112] If dmrs-TypeA-Positio = pos2, then the starting position of DMRS begins from the symbol #2 of the time slot;

[0113] If dmrs-TypeA-Positio=pos3, then the starting position of DMRS begins from the symbol #3 of the time slot.

[0114] The dmrs-TypeA-Position parameter protocol only defines two values: pos2 and pos3. That is, if the scheduled PUSCH resource starts from symbol #4, then DMRS cannot use mapping type A. If the PDCCH channel occupies symbols #0 to #2, DMRS cannot be configured as pos2 to avoid conflict with the PDCCH position.

[0115] (2) If it is mapping type B, then the starting position of DMRS is relative to the scheduled PUSCH resource, and the starting symbol position is fixed at the 0th symbol of the PUSCH scheduling resource, see reference. Figure 5 .

[0116] How to obtain DMRS configuration type:

[0117] The UE obtains the DMRS mapping type by parsing the RRC (Radio Resource Control) message.

[0118] 2. DMRS Configuration Type

[0119] Once the base station has selected a mapping type for PUSCH DMRS, it can continue to configure frequency domain resources for DMRS, i.e., DMRS type. DMRS type is sometimes also referred to as DMRS Configurationtype.

[0120] 3GPP has specified two configuration types for PUSCH DMRS: type 1 and type 2.

[0121] like Figure 6 As shown in (1), for type 1, the DMRS REs are distributed in the frequency domain of a certain symbol with a density of 50%; as Figure 6As shown in (2), for type 2, DMRS REs are connected in pairs, with a spacing of 4 REs between them, and the density is 33.3%.

[0122] 3. Parameters of DMRS configuration information

[0123] The UE obtains the parameters of the DMRS configuration information by parsing the RRC message: RRCSetup / RRCReconfiguration→PUSCH-Config→DMRS-UplinkConfig.

[0124] The parameters of the DMRS configuration information include:

[0125] dmrs-AdditionalPosition: The position of the additional DMRS. If this parameter is not configured in the RRC message, the default value is pos2, indicating that there are 2 positions for the additional DMRS. The NR protocol allows the base station to configure up to 3 positions for the additional DMRS for the PDSCH in one time slot (corresponding to pos3), and also allows no additional DMRS to be configured (corresponding to pos0).

[0126] When dmrs-AdditionalPosition=pos1, the subsequent DMRS is located at symbol #11;

[0127] When dmrs-AdditionalPosition=pos2, the subsequent DMRS is located at symbol #7, #11;

[0128] When dmrs-AdditionalPosition=pos3, the post-DMRS is located at symbol #5, #8, #11.

[0129] dmrs-Type: The configuration type for PUSCH DMRS. If this parameter is not configured in the RRC message, the default value is type 1.

[0130] `maxLength`: The maximum number of symbols occupied by the frontend DMRS. If this parameter is not configured in the RRC message, the default value is `len1`, meaning the frontend DMRS occupies only 1 symbol. A value of `len2` indicates that the frontend DMRS can occupy a maximum of 2 symbols; some time slots can occupy 1 symbol, while others can occupy 2. The actual number of symbols occupied is dynamically determined by the "Antenna port(s)" field in DCI1-1. The design of two symbols is to support more antenna ports.

[0131] phaseTrackingRS: Phase tracking reference signal. This parameter is not configured by default if it is not set in the RRC message. Phase noise in the FR1 band has a limited impact on system performance and is not discussed in this application.

[0132] scramblingID0 and scramblingID1: Two parameters used to calculate the PUSCH DMRS sequence.

[0133] 4. DMRS RE Time-Frequency Position Calculation

[0134] Protocol 38.211 provides the following formula for calculating the time-frequency position (k, l) of the DMRS RE:

[0135]

[0136] in, l is the time-domain start position of DMRS. For PUSCH mapping type A: l is defined relative to the start of the time slot; for PUSCH mapping type B: l is defined relative to the start of the scheduled PUSCH resource. The values ​​are obtained by referring to Tables 3 and 4; l′ is obtained by referring to Table 5.

[0137]

[0138] Where k′ = 0, 1; n takes the form of a non-negative integer.

[0139] Table 1 PUSCH DMRS Configuration Type 1

[0140]

[0141]

[0142] Table 2 PUSCH DMRS Configuration Type 2

[0143]

[0144] Table 3 PUSCH DMRS Location For single-symbol DMRS

[0145]

[0146]

[0147] Table 4 PUSCH DMRS Location For double-symbol DMRS

[0148]

[0149] Table 5 PUSCH DMRS time index l′ and antenna port p

[0150]

[0151] Let's take the mapping type A+type 1+single symbol as an example.

[0152] For example: dmrs-TypeA-Position=pos2, DMRS mapping type=A, DMRS type=1 (i.e. Configuration Type), dmrs-AdditionalPosition=pos1, maxLen=1, the current time slot PUSCH occupies 13 OFDM symbols, and the antenna port p=1000.

[0153] First, calculate the position of DMRS RE in the frequency domain:

[0154] Step 1: Determine the formula for calculating the frequency domain position k. Since DMRS type = 1 and p = 1000, according to Table 1, the formula for the frequency domain position k becomes k = 4n + 2k′.

[0155] Step 2: Determine the frequency domain position k of each RE.

[0156] (1) If n = 0 and k′ = 0, then k = 4n + 2k′ = 0;

[0157] (2) If n = 0 and k′ = 1, then k = 4n + 2k′ = 2;

[0158] (3) If n = 1 and k′ = 0, then k = 4n + 2k′ = 4;

[0159] (4) If n = 1 and k′ = 1, then k = 4n + 2k′ = 6;

[0160] (5) If n = 2 and k′ = 0, then k = 4n + 2k′ = 8;

[0161] (6) If n = 2 and k′ = 1, then k = 4n + 2k′ = 10;

[0162] (7) If n = 3 and k′ = 0, then k = 4n + 2k′ = 12;

[0163] (8) If n = 3 and k′ = 1, then k = 4n + 2k′ = 14;

[0164] And so on, such as Figure 7 As shown, the frequency domain position of DMRS within a single RB in the frequency domain is (0, 2, 4, 6, 8, 10).

[0165] Step 3: Calculate the location of the DMRS RE in the time domain: Determine the time domain table to be used next. Since maxLen = 1, we need to look up Table 3 at this time.

[0166] Step 4: Determine l d The value of l. Since it is a mapping type A, therefore l d This refers to the number of symbols between the first OFDM symbol of the current time slot and the last symbol of the PUSCH resource. In this example, based on the preconditions, l d =14.

[0167] Step 5: Determine the starting symbol positions of all DMRS REs in the current time slot (there may be multiple starting positions within the same time slot). Continue to look up the values ​​in Table 3. d In the row containing 14, since dmrs-AdditionalPosition=pos1, the time domain position of DMRS has two positions: l0 and l1.

[0168] Step 6: Determine the value of l'. Referring to Table 5, since it is a single-symbol DMRS, we know that l' = 0 at this time.

[0169] Step 7: Determine the final time-domain position l. Since there is one post-DMRS, there are two final time-domain positions for the DMRS RE in this example: l = l0 + l', l1 + l' = symbol #2, and symbol #11, respectively. See Figure 8 below. Here, symbol #2 corresponds to the pre-DMRS, and symbol #11 corresponds to the post-DMRS.

[0170] In summary, the time-frequency location of the DMRS can be determined based on the configuration information such as the DMRS configuration type, DMRS mapping type, and number of single and double symbols in the RRC message, thereby identifying the CDM (Code-Division Multiplexing) group corresponding to the DMRS.

[0171] The base station transmits DMRS signals in each PDSCH time slot, and the DMRS transmitted in each time slot can include multiple orthogonal reference signals. Orthogonal reference signals that are the same in the time domain can be distinguished by the frequency domain or the code domain.

[0172] In NR, there is a one-to-one correspondence between DMRS orthogonal signals, layer numbers, and antenna ports. If the current scheduling is downlink 4-stream, then there are 4 layers of transmission, which, together with 4 different DMRS orthogonal signals, are mapped to 4 different antenna ports through a precoding matrix.

[0173] For a single-symbol DMRS reference signal, configuration type 1 can support up to 4 orthogonal DMRS signals, and configuration type 2 can support up to 6 orthogonal DMRS signals.

[0174] For dual-symbol DMRS reference signals, configuration type 1 can support up to 8 orthogonal DMRS signals, and configuration type 2 can support up to 12 orthogonal DMRS signals.

[0175] Two DMRS signals using the same subcarrier belong to the same code division multiplexing group (CDM group). They cannot be distinguished from each other in the time domain or frequency domain, but only in the code domain (i.e., OCC (Orthogonal Cover Code)).

[0176] Referring to Table 1, type 1 DMRS has 2 CDM groups. p(Port, antenna port) 1000 / 1001 / 1004 / 1005 belong to CDM group 0, and Port 1002 / 1003 / 1006 / 1007 belong to CDM group 1.

[0177] Referring to Table 2, type 2 DMRS 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.

[0178] For PDSCH / PUSCH, the data layer for data transmission corresponds to the DMRS port used for demodulation. The design of the data channel (PDSCH / PUSCH) DMRS in an NR system mainly includes the following aspects:

[0179] • Front-load DMRS: Within each scheduling time unit, the first occurrence of the DMRS should be as close as possible to the start of the scheduling. The use of front-load DMRS helps the receiver quickly estimate the channel and perform reception detection, playing a crucial role in reducing latency and supporting so-called self-contained structures. Depending on the total number of orthogonal DMRS ports, front-load DMRS can occupy a maximum of two consecutive OFDM symbols.

[0180] • Additional DMRS (Post-DMRS): For low-mobility scenarios, front-load DMRS can achieve channel estimation performance that meets demodulation requirements with lower overhead. However, NR systems consider mobility speeds up to 500 km / h. Faced with such a large dynamic range of mobility, in addition to front-load DMRS, more DMRS symbols need to be inserted during the scheduling duration in medium / high-speed scenarios to meet the estimation accuracy for time-varying channel characteristics. To address this issue, NR systems employ a DMRS structure combining front-load DMRS with additional DMRS whose time-domain density is configurable. Each additional DMRS pattern is a repetition of the front-load DMRS.

[0181] Within each scheduling time unit, if additional DMRS exist, the pattern of each additional DMRS group is consistent with that of the front-load DMRS. Therefore, the pattern design of the front-load DMRS is the foundation of DMRS design. The design approaches for front-load DMRS fall into two categories: the first type (type 1) uses a COMB (comb structure) + OCC (Orthogonal Cover Code) structure, and the second type (type 2) is based on an FDM (Frequency Division Multiplexing) + OCC structure.

[0182] Depending on the number of orthogonal ports used for transmission, front-load DMRS can be configured with a maximum of two OFDM (Orthogonal Frequency Division Multiplexing) symbols.

[0183] In an optional embodiment, configuration type 1, single-symbol front-load DMRS diagram is shown below. Figure 9 Configuration type 1, double-symbol front-load DMRS diagram, see [link / reference]. Figure 10 Configuration type 2, single-symbol front-load DMRS diagram (see configuration type 2). Figure 11 Configuration type 2, double-symbol front-load DMRS diagram (see...) Figure 12 .

[0184] In medium / high-speed scenarios, in addition to the front-load DMRS, more DMRS symbols need to be inserted during the scheduling duration to meet the estimation accuracy of channel time-varying characteristics. The NR system employs a DMRS structure combining front-load DMRS with additional DMRS of configurable time-domain density. Each set of additional DMRS patterns is a repetition of the front-load DMRS. Therefore, consistent with front-load DMRS, each set of additional DMRS can occupy a maximum of two consecutive DMRS symbols. Depending on the specific use case, a maximum of three sets of additional DMRS can be configured in each scheduling session. The number of additional DMRS depends on the higher-layer parameter configuration and the specific scheduling duration.

[0185] Tables 6, 7, 8, and 9 are DMRS port allocation tables with different parameter configurations under the uplink CP-OFDM waveform.

[0186] Table 6 Antennaport(s), transform precoder is disabled, dmrs-Type=1, maxLength=1, rank=1 (DMRS type 1, single symbol, single stream transmission)

[0187]

[0188] Table 7 Antenna port(s), transform precoder is disabled, dmrs-Type=1, maxLength=1, rank=2 (DMRS type 1, single symbol, dual stream transmission)

[0189] 0 1 0，1 1 2 0，1 2 2 2，3 3 2 0，2 4-7 Reserved Reserved

[0190] Table 8 Antenna port(s), transform precoder is disabled, dmrs-Type=1, maxLength=1, rank=3 (DMRS type 1, single symbol, three-stream transmission)

[0191] 0 2 0-2 2-7 Reserved Reserved

[0192] Table 9 Antenna port(s), transform precoder is disabled, dmrs-Type=1, maxLength=1, rank=4 (DMRS type 1, single symbol, 4-stream transmission)

[0193] 0 2 0-3 2-7 Reserved Reserved

[0194] Rate matching (mRtching)

[0195] The PUSCH channel processing includes: adding CRC and code block segmentation, channel coding, rate matching, code block concatenation, scrambling, modulation, and layer mapping. Sometimes, the encoded data obtained after channel coding may be quite large, but the allocated available resources may be insufficient. For example, some resources may be used for reference signals, control channels, or system messages. In such cases, the terminal needs to punch holes in these non-reusable resources to prevent data transmission on them. Therefore, rate matching is required to match data with available resources.

[0196] In the R18 uplink MIMO (Multiple Input Multiple Output) enhancement, we consider using multiple panels in the terminal to achieve simultaneous uplink transmission to multiple TRPs, in order to further improve the uplink system transmission throughput and transmission reliability.

[0197] In PDSCH (Physical Downlink Shared Channel) scheduling based on M-DCI, the time-frequency resource allocation of different PDSCHs supports fully / partially / non-overlapping scenarios, for example, as... Figure 13 As shown, the transmission resources of PUSCH1 and PUSCH2 completely overlap in the time domain, or, as... Figure 14 As shown, the transmission resources of PUSCH1 and PUSCH2 partially overlap in the time and frequency domains. When considering support for PUSCH based on M-DCI scheduling, similar resource allocation scenarios will also be taken into account. In the R16 M-DCI PUSCH transmission scheme, cooperative transmission using TDM (Time Division Multiplexing) is primarily supported. Currently, it is necessary to discuss which resource allocation scenarios are supported and how to support them under the premise of multiple panel terminals.

[0198] In R18, for multi-panel uplink transmission based on M-DCI, when the terminal sends different PUSCHs that are completely / partially overlapping in the time domain and completely / partially overlapping in the frequency domain from different panels, the DMRS of one PUSCH will interfere with the DMRS and data of another PUSCH, resulting in a reduction in actual channel estimation and reception performance. To address this problem, this application provides a DMRS configuration method.

[0199] Please refer to Figure 15 It illustrates a flowchart of a DMRS configuration method provided in one embodiment of this application, which can be applied to Figure 1 In the communication system shown, this method is executed by the terminal. The method includes the following steps.

[0200] Step 210: Receive the configuration information of the DMRS of the PUSCH sent by the access network device; wherein, in the transmission configuration of simultaneous uplink transmission via multi-panel (STxMP) based on two antenna panels by multiple DCI scheduling terminals, the DMRS configuration information is used to instruct the terminal to send the DMRS of the corresponding PUSCH through the two antenna panels respectively according to the configuration information.

[0201] The terminal includes multiple antenna panels, and supports simultaneous uplink transmission from multiple antenna panels. Optionally, the terminal includes two panels: a first panel (first antenna panel) and a second panel (second antenna panel). The terminal supports simultaneous uplink transmission from both the first panel and the second panel.

[0202] Optionally, in a transmission configuration where multiple DCI scheduling terminals simultaneously transmit uplink data based on up to two antenna panels, the DMRS configuration information is used to instruct the terminal to send the corresponding PUSCH DMRS data through up to two antenna panels according to the configuration information.

[0203] For example, the configuration information of PUSCH's DMRS is carried in RRC messages and / or DCI messages.

[0204] For example, DMRS configuration information includes DMRS mapping type, DMRS configuration type, and the number of single / double symbols. Of course, DMRS configuration information may also include any of the DMRS configuration-related parameters mentioned above. For example, DMRS mapping type, DMRS configuration type, and the number of single / double symbols are carried in RRC messages.

[0205] Optionally, the DMRS configuration information also includes a target field, which can be a non-reusable CDM group field (CDM groups without data). The target field is carried in the DCI message.

[0206] For example, a terminal receives an RRC message sent by an access network device, the RRC message carrying configuration information for the DMRS of the PUSCH. Alternatively, a first panel receives a first DCI sent by a first TRP, the first DCI carrying configuration information for the first DMRS corresponding to the first PUSCH sent by the first panel; a second panel receives a second DCI sent by a second TRP, the second DCI carrying configuration information for the second DMRS corresponding to the second PUSCH sent by the second panel. Exemplarily, the first DCI is used to schedule the first panel to send the first PUSCH at a first transmission timing, and the second DCI is used to schedule the second panel to send the second PUSCH at a second transmission timing, where the first and second transmission timings have partially or completely overlapping time-frequency resources.

[0207] The configuration information, such as DMRS mapping type, DMRS configuration type, and number of single / double symbols, is used to indicate the CDM group / CDM group set corresponding to the PUSCH's DMRS. For example, the corresponding CDM group / CDM group set can be determined by looking up a table based on the DMRS mapping type, DMRS configuration type, and number of single / double symbols.

[0208] Optionally, the configuration information of the DMRS is used to configure the first DMRS of the first PUSCH sent through the first panel to correspond to the first CDM group or the first CDM group set, and the second DMRS of the second PUSCH sent through the second panel to correspond to the second CDM group or the second CDM group set.

[0209] For example, the DMRS configuration information includes first configuration information corresponding to the first panel and second configuration information corresponding to the second panel. The first configuration information includes a first DMRS mapping type, a first DMRS configuration type, and a first number of single / double symbols; the second configuration information includes a second DMRS mapping type, a second DMRS configuration type, and a second number of single / double symbols. Based on the first configuration information, the first CDM group / first CDM group set corresponding to the first DMRS sent by the first panel can be determined. Based on the second configuration information, the second CDM group / second CDM group set corresponding to the second DMRS sent by the second panel can be determined.

[0210] Based on the PSUCH scheduling of the two panels, the access network equipment can configure the two DMRS of the two panels in the same CDM group, or configure the two DMRS of the two panels in different CDM groups. For example, when the interference between the two panels is severe, the two DMRS are configured in different CDM groups; when the interference between the two panels is severe, the two DMRS can be configured in the same CDM group.

[0211] For example, such as Figure 16 As shown, according to the DMRS configuration information, the first panel transmits the first DMRS of the first PUSCH on the RE corresponding to the first CDM group; the second panel transmits the second DMRS of the second PUSCH on the RE corresponding to the second CDM group. Thus, the two DMRS transmitted by the two panels can be separated in the time domain and frequency domain.

[0212] Or, such as Figure 17 As shown, according to the DMRS configuration information, the first panel transmits the first DMRS of the first PUSCH on the RE corresponding to the first CDM group; the second panel also transmits the second DMRS of the second PUSCH on the RE corresponding to the first CDM group. Thus, the two DMRS transmitted by the two panels are transmitted on the same time-frequency resources, and the two DMRS transmitted by the two panels are distinguished in the code domain by OCC.

[0213] The Non-Reusable CDM Group field is used to indicate CDM groups that cannot be reused for transmitting data portions. For example, if the Non-Reusable CDM Group field indicates that the first CDM group is not reusable, then when the terminal performs rate matching for the data portion of the PUSCH, it will puncture the transmission resource corresponding to the first CDM group and will not transmit the data portion of the PUSCH on the RE corresponding to the first CDM group.

[0214] For example, the terminal receives multiple DCIs sent by the access network device, and the multiple DCIs schedule multiple panels of the terminal to perform uplink transmission simultaneously. Simultaneous transmission refers to the fact that the transmission timing of multiple uplink transmissions has full / partial overlap in the time domain and full / partial overlap in the frequency domain resources.

[0215] For example, a 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 at a first transmission timing. The terminal also receives a second PDCCH sent by a second TRP through a second panel. The second PDCCH includes a second DCI, and the second DCI schedules the second panel to send a second PUSCH at a second transmission timing. The first and second transmission timings overlap in the time domain and their symbols overlap in the frequency domain.

[0216] In summary, the method provided in this embodiment configures the DMRS configuration information of the PUSCH for the terminal device by the access network device. When the access network device schedules two panels of the terminal device to send PUSCH simultaneously through multiple DCIs, the terminal device sends the DMRS of the PUSCH from the two panels respectively according to the DMRS configuration information, thereby realizing the separate configuration of the two DMRS sent by the two panels. The access network device can avoid interference between the two DMRS by configuring the two DMRS on different time-frequency resources or code domains, thereby improving the performance of the access network device in receiving DMRS and performing channel estimation based on DMRS.

[0217] Please refer to Figure 18 It illustrates a flowchart of a DMRS configuration method provided in one embodiment of this application, which can be applied to Figure 1 In the communication system shown, this method is performed by the access network device. The method includes the following steps.

[0218] Step 220: Send the configuration information of the DMRS of the PUSCH to the terminal; wherein, in the transmission configuration where multiple DCI scheduling terminals perform uplink simultaneous transmission based on two antenna panels, the DMRS configuration information is used to instruct the terminal to send the DMRS of the corresponding PUSCH through the two antenna panels respectively according to the configuration information.

[0219] Optionally, in a transmission configuration where multiple DCI scheduling terminals simultaneously transmit uplink data based on up to two antenna panels, the DMRS configuration information is used to instruct the terminal to send the corresponding PUSCH DMRS data through up to two antenna panels according to the configuration information.

[0220] For example, the access network device is configured to allow the DMRS ports / port groups corresponding to different PUSCHs sent from different panels to come from different CDM groups / CDM group sets. Alternatively, the access network device is configured to allow the DMRS ports / port groups corresponding to different PUSCHs sent from different panels to use the same CDM group / CDM group set.

[0221] In summary, the method provided in this embodiment configures the DMRS configuration information of the PUSCH for the terminal device by the access network device. When the access network device schedules two panels of the terminal device to send PUSCH simultaneously through multiple DCIs, the terminal device sends the DMRS of the PUSCH from the two panels respectively according to the DMRS configuration information, thereby realizing the separate configuration of the two DMRS sent by the two panels. The access network device can avoid interference between the two DMRS by configuring the two DMRS on different time-frequency resources or code domains, thereby improving the performance of the access network device in receiving DMRS and performing channel estimation based on DMRS.

[0222] Please refer to Figure 19 It illustrates a flowchart of a DMRS configuration method provided in one embodiment of this application, which can be applied to Figure 1 In the communication system shown, this method is performed by a terminal and an access network device. The method includes the following steps.

[0223] Step 301: The access network device sends an RRC message to the terminal. The RRC message carries the configuration information of the PUSCH's DMRS.

[0224] Optionally, the configuration information of the DMRS includes first configuration information of the first DMRS corresponding to the first PUSCH transmitted by the first antenna panel and second configuration information of the second DMRS corresponding to the second PUSCH transmitted by the second antenna panel.

[0225] In one optional embodiment, the access network device configures different CMD groups for the two DMRS corresponding to the two panels, that is, there are no 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.

[0226] For example, the first CDM group and the second CDM group are different CDM groups; the first CDM group set does not contain the second CDM group; the second CDM group set does not contain the first CDM group; the first CDM group set and the second CDM group set do not contain the same CDM group.

[0227] In another optional embodiment, the access network device configures the same CMD group for the two DMRS corresponding to the two panels, that is, 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 belongs to the same CDM group.

[0228] For example, the first CDM group and the second CDM group are the same CDM group; the first CDM group set contains the second CDM group; the second CDM group set contains the first CDM group; the first CDM group set and the second CDM group set contain at least one of the same CDM groups.

[0229] If there are no 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, that is, there is at least one configuration difference between the DMRS mapping type, DMRS configuration type, and single / double symbol number configuration in the first configuration information and the second configuration information, or the position of the first DMRS symbol indicated by the first configuration information and the second configuration information in the time slot is different.

[0230] If 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 belong to the same CDM group, that is, the DMRS mapping type, DMRS configuration type, and single / double symbol number configuration in the first configuration information and the second configuration information are the same, and the position of the first DMRS symbol indicated by the first configuration information and the second configuration information in the time slot is the same.

[0231] Step 302: The access network device sends the first DCI to the first panel.

[0232] The first DCI is used to schedule the first panel to send the first PUSCH.

[0233] Step 303: The access network device sends the second DCI to the second panel.

[0234] The second DCI is used to schedule the second panel to send the second PUSCH.

[0235] Step 304: The terminal sends the first DMRS of the first PUSCH through the first panel according to the DMRS configuration information.

[0236] When an access network device transmits PUSCH simultaneously through multiple panels of multiple DCI scheduling terminals, the terminal sends the first DMRS of the first PUSCH through the first panel and the second DMRS of the second PUSCH through the second panel, according to the DMRS configuration information.

[0237] When the access network device is configured to send different PUSCHs from different panels, and the corresponding DMRS ports / port groups are from different CDM groups, then the two panels send two DMRSs on the REs corresponding to the different CDM groups respectively.

[0238] When the access network device is configured to send different PUSCHs from different panels, the corresponding DMRS ports / port groups are from the same CDM group, then the two panels can send two DMRSs on the REs corresponding to the same CDM group.

[0239] Step 305: The terminal sends the second DMRS of the second PUSCH through the second panel according to the DMRS configuration information.

[0240] In summary, the method provided in this embodiment configures the DMRS configuration information of the PUSCH for the terminal device by the access network device. When the access network device schedules two panels of the terminal device to send PUSCH simultaneously through multiple DCIs, the terminal device sends the DMRS of the PUSCH from the two panels respectively according to the DMRS configuration information, thereby realizing the separate configuration of the two DMRS sent by the two panels. The access network device can avoid interference between the two DMRS by configuring the two DMRS on different time-frequency resources or code domains, thereby improving the performance of the access network device in receiving DMRS and performing channel estimation based on DMRS.

[0241] For example, in at least one of the following scenarios, the access network device can be configured to send different PUSCHs from different panels to DMRS ports / port groups from independent CDM groups.

[0242] Scene 1:

[0243] A scenario where the first antenna panel and the second antenna panel send their respective PUSCHs to the same transmission and reception point TRP.

[0244] When the first DCI schedules the first panel to send the first PUSCH to the first TRP, and the second DCI schedules the second panel to send the first PUSCH to the first TRP, the access network device configures different CMD groups for the two DMRS corresponding to the two panels.

[0245] For example, the first DMRS of the first PUSCH sent by the first panel corresponds to the first CDM group / the first CDM group set; the second DMRS of the second PUSCH sent by the second panel corresponds to the second CDM group / the 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.

[0246] That is, at least one configuration differs between the first configuration information and the second configuration information in terms of DMRS mapping type, DMRS configuration type, and single / double symbol number configuration, or the first configuration information and the second configuration information indicate different positions of the first DMRS symbol in the time slot.

[0247] Scene 2:

[0248] A scenario where the first antenna panel and the second antenna panel send their respective PUSCH to different TRPs.

[0249] When the first DCI schedules the first panel to send the first PUSCH to the first TRP, and the second DCI schedules the second panel to send the first PUSCH to the second TRP, the access network device configures different CMD groups for the two DMRS corresponding to the two panels.

[0250] For example, the first DMRS of the first PUSCH sent by the first panel corresponds to the first CDM group / the first CDM group set; the second DMRS of the second PUSCH sent by the second panel corresponds to the second CDM group / the 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.

[0251] That is, at least one configuration differs between the first configuration information and the second configuration information in terms of DMRS mapping type, DMRS configuration type, and single / double symbol number configuration, or the first configuration information and the second configuration information indicate different positions of the first DMRS symbol in the time slot.

[0252] Optionally, in a scenario where the two antenna panels are scheduled to send their respective PUSCH to the two TRPs, the access network device can also determine the interference between the two panels based on the signal detection results of the two beams sent by the two panels respectively. If the interference between the two panels is large, then different CDM groups are configured for the two DMRS of the two panels.

[0253] For example, the access network device detects the first beam transmitted by the first panel and obtains a first signal detection result. The first signal detection result may include at least one of SINR (Signal to Interference plus Noise Ratio), RSRP (Reference Signal Receiving Power), RSRQ (Reference Signal Receiving Quality), and RSSI (Received Signal Strength Indication). If the first signal detection result meets the interference condition, DMRS configuration information is sent to the terminal. The DMRS configuration information configures that 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.

[0254] The interference condition can be that the data in the first signal detection result reaches a threshold.

[0255] Alternatively, the access network device detects the second beam transmitted by the second panel to obtain a second signal detection result. The second signal detection result may include at least one of SINR, RSRP, RSRQ, and RSSI. If the second signal detection result meets the interference conditions, the device sends DMRS configuration information to the terminal. The DMRS configuration information configures that there are no 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.

[0256] Optionally, if the first signal detection result or the second signal detection result does not meet the interference conditions, the access network device can also send DMRS configuration information to the terminal. The DMRS configuration information configures that neither the first DMRS port / port group corresponding to the first DMRS nor the second DMRS port / port group corresponding to the second DMRS belongs to the same CDM group. That is, if the interference between the two panels is not severe, the access network device can also configure different CDM groups for the two DMRS.

[0257] In an optional embodiment, when multiple panels of a multi-DCI scheduler simultaneously send PUSCH to different TRPs, the access network device is configured by default to have no 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.

[0258] For example, in a scenario where two antenna panels send PUSCH to two TRPs respectively, the access network device can also be configured to have DMRS ports / port groups corresponding to different PUSCHs sent from different panels originate from the same CDM group.

[0259] Scene 3:

[0260] The first and second antenna panels send PUSCH to different TRPs.

[0261] When the first DCI schedules the first panel to send the first PUSCH to the first TRP, and the second DCI schedules the second panel to send the first PUSCH to the second TRP, the access network device configures the same CMD group for the two DMRS corresponding to the two panels.

[0262] For example, the first DMRS of the first PUSCH sent by the first panel corresponds to the first CDM group / the first CDM group set; the second DMRS of the second PUSCH sent by the second panel corresponds to the second CDM group / the second CDM group set. Wherein, the first CDM group and the second CDM group are the same CDM group, or the first CDM group set contains the second CDM group, or the second CDM group set contains the first CDM group, or the first CDM group set and the second CDM group set contain at least one of the same CDM groups.

[0263] That is, the DMRS mapping type, DMRS configuration type, and single / double symbol number configurations in the first configuration information and the second configuration information are the same, and the position of the first DMRS symbol indicated by the first configuration information and the second configuration information in the time slot is the same.

[0264] Optionally, in scenarios where two antenna panels are scheduled to send their respective PUSCHs to two TRPs, the access network device can also determine the interference between the two panels based on the signal detection results of the two beams sent by the two panels respectively. If the interference between the two panels is significant, different CDM groups are configured for the two DMRSs of the two panels. If the interference between the two panels is minor, the same CDM group can be configured for the two DMRSs of the two panels.

[0265] For example, the access network device detects the first beam transmitted by the first panel and obtains a first signal detection result. The first signal detection result may include at least one of SINR, RSRP, RSRQ, and RSSI. If the first signal detection result does not meet the interference conditions, the device sends DMRS configuration information to the terminal. The DMRS configuration information configures that 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 belong to the same CDM group.

[0266] The interference condition could be that the data in the first signal detection result does not reach the threshold.

[0267] Alternatively, the access network device detects the second beam transmitted by the second panel to obtain a second signal detection result. The second signal detection result may include at least one of SINR, RSRP, RSRQ, and RSSI. If the second signal detection result does not meet the interference conditions, DMRS configuration information is sent to the terminal. The DMRS configuration information configures that 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 belong to the same CDM group.

[0268] In summary, the method provided in this embodiment addresses the issue of significant interference between multiple panels when multiple panels of the scheduling terminal send PUSCH to the same TRP. Therefore, it can be configured that the DMRS ports / DMRS port groups corresponding to different PUSCHs sent from different panels originate from independent CDM groups, thereby reducing interference between panels.

[0269] The method provided in this embodiment can be configured such that when multiple panels of the scheduling terminal send PUSCH to different TRPs, the DMRS ports / DMRS port groups corresponding to different PUSCHs sent from different panels come from independent CDM groups, thereby reducing interference between panels; alternatively, the DMRS ports / DMRS port groups corresponding to different PUSCHs sent from different panels can be configured to come from the same CDM group.

[0270] The method provided in this embodiment can configure DMRS based on the interference between two panels when multiple panels of the scheduling terminal send PUSCH to different TRPs. If the interference between the two panels is large, the DMRS port / DMRS port group corresponding to different PUSCH sent from different panels can be configured to come from an independent CDM group to reduce interference between panels. If the interference between the two panels is small, the DMRS port / DMRS port group corresponding to different PUSCH sent from different panels can be configured to come from the same CDM group.

[0271] For example, in order to avoid interference between the DMRS of one PUSCH and the data portion of another PUSCH, embodiments of this application also use a target field to rate match the data portion of the PUSCH.

[0272] The DMRS configuration information is also used for rate matching of the PUSCH data portion of the two antenna panels; the DMRS configuration information includes a target field, which is used to indicate the CDM group that cannot be multiplexed with the data portion transmitted with the PUSCH.

[0273] Please refer to Figure 20 It illustrates a flowchart of a DMRS configuration method provided in one embodiment of this application, which can be applied to Figure 1 In the communication system shown, this method is performed by a terminal and an access network device. The method includes the following steps.

[0274] Step 401: The access network device sends a first target field to the first panel of the terminal. The code point correspondence information of the first target field is used to indicate that the time-frequency resources corresponding to the second CDM group / second CDM group set cannot be multiplexed with the data part transmitted by PUSCH.

[0275] Optionally, the target field is carried in the DCI. The first panel receives the first DCI sent by the access network device, and the first DCI carries the first target field.

[0276] For example, the first target field could be CDMgroups without data in the antenna port field of the first DCI.

[0277] CDM groups without data indicates which CDM groups' REs cannot reuse data.

[0278] For example, CDM groups without data can take three values: 1, 2, and 3.

[0279] A value of 1 indicates that the RE in the current CDM group 0 cannot reuse data;

[0280] A value of 2 indicates that neither the REs in CDM group 0 nor CDM group 1 can reuse data.

[0281] A value of 3 indicates that the REs in the current CDM group 0, CDM group 1 and CDM group 2 cannot reuse data.

[0282] Therefore, the access network device can indicate to the first panel through the first target field the CDM group / CDM group set that has been occupied by the second DMRS of the second panel.

[0283] For example, if the second DMRS is configured as CDM group 0, then the first target field can take the value 1. This indicates that the data portion of the first PUSCH cannot reuse the RE from CDM group 0. As another example, if the second DMRS is configured as CDM group 1, then the first target field can take the value 2. This indicates that the data portion of the first PUSCH cannot reuse the REs from both CDM group 0 and CDM group 1.

[0284] Step 402: The access network device sends a second target field to the second panel of the terminal. The code point correspondence information of the second target field is used to indicate that the time-frequency resources corresponding to the first CDM group / the first CDM group set cannot be multiplexed with the data part transmitted by PUSCH.

[0285] Optionally, the target field is carried in the DCI. The second panel receives the second DCI sent by the access network device, and the second DCI carries the second target field.

[0286] For example, the second target field could be CDM groups without data in the antenna port of the second DCI.

[0287] Therefore, the access network device can indicate to the second panel through the second target field the CDM group / CDM group set that has been occupied by the first DMRS of the first panel.

[0288] For example, if the first DMRS is configured as CDM group 1, then the first target field can take the value 2. This indicates that the data portion of the second PUSCH cannot reuse REs from CDM group 0 and CDM group 1. As another example, if the second DMRS is configured as CDM group 2, then the first target field can take the value 3. This indicates that the data portion of the second PUSCH cannot reuse REs from CDM group 0, CDM group 1, and CDM group 2.

[0289] Step 403: The terminal performs rate matching of the data portion of the first PUSCH based on the code point of the first target field.

[0290] The terminal device performs rate matching on the data portion of the first PUSCH according to the non-reusable CDM group indicated by the first target field. Optionally, the terminal device performs puncturing on the RE corresponding to the non-reusable CDM group in the transmission resources of the first PUSCH, that is, performs rate matching on the data portion of the first PUSCH, and then maps the data portion of the first PUSCH onto these remaining transmission resource REs.

[0291] Step 404: The terminal performs rate matching of the data portion of the second PUSCH based on the code point of the second target field.

[0292] The terminal device performs rate matching on the data portion of the second PUSCH according to the non-reusable CDM group indicated by the second target field. Optionally, the terminal device performs rate matching on the physical RE resources corresponding to the data transmission of the second PUSCH within the transmission resources of the second PUSCH, specifically on the RE resources corresponding to the non-reusable CDM group, thereby mapping the data portion of the second PUSCH onto these remaining transmission resource REs.

[0293] In summary, the method provided in this embodiment, when multiple panels of the scheduling terminal send PUSCH to the same TRP, configures a target field for each panel so that each panel performs rate matching according to the target field when transmitting the data part of the PUSCH, thereby avoiding interference between the DMRS of one PUSCH and the data part of another PUSCH.

[0294] Figure 21This illustration shows a structural block diagram of a configuration apparatus for a demodulation reference signal (DMRS) provided in an exemplary embodiment of this application. The apparatus can be implemented as a terminal, or as part of a terminal. The apparatus includes:

[0295] The receiving module 501 is used to receive the configuration information of the demodulation reference signal DMRS of the uplink shared channel PUSCH sent by the access network device;

[0296] In the transmission configuration where multiple downlink control information (DCI) scheduling terminals simultaneously transmit STxMP uplink based on two antenna panels, the DMRS configuration information is used to instruct the terminal to send the corresponding PUSCH DMRS through the two antenna panels according to the configuration information.

[0297] In an optional embodiment, the two antenna panels include a first antenna panel and a second antenna panel;

[0298] The configuration information of the DMRS is used to configure the first DMRS of the first PUSCH transmitted through the first antenna panel to correspond to the first code division multiplexing (CDM) group or the first CDM group set, and the second DMRS of the second PUSCH transmitted through the second antenna panel to correspond to the second CDM group or the second CDM group set.

[0299] In an optional embodiment, there are no 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;

[0300] Wherein, 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, including at least one of the following situations:

[0301] The first CDM group and the second CDM group are different CDM groups; the first CDM group set does not contain the second CDM group; the second CDM group set does not contain the first CDM group; and the first CDM group set and the second CDM group set do not contain the same CDM group.

[0302] In an optional embodiment, the configuration information of the DMRS includes first configuration information of the first DMRS corresponding to the first PUSCH transmitted by the first antenna panel and second configuration information of the second DMRS corresponding to the second PUSCH transmitted by the second antenna panel.

[0303] The first configuration information and the second configuration information differ in at least one of the following configurations: DMRS mapping type, DMRS configuration type, and single / double symbol number configuration; or the first configuration information and the second configuration information indicate different positions of the first DMRS symbol in the time slot.

[0304] In an optional 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 applicable to scenarios where the first antenna panel and the second antenna panel respectively send their respective PUSCHs to the same transmission receiving point TRP.

[0305] In an optional 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 applicable to scenarios where the first antenna panel and the second antenna panel send their respective PUSCHs to different TRPs.

[0306] In an optional embodiment, 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 belong to the same CDM group;

[0307] Wherein, 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 belong to the same CDM group, including at least one of the following situations:

[0308] The first CDM group and the second CDM group are the same CDM group; the first CDM group set contains the second CDM group; the second CDM group set contains the first CDM group; the first CDM group set and the second CDM group set contain at least one identical CDM group.

[0309] In an optional embodiment, the configuration information of the DMRS includes first configuration information of the first DMRS corresponding to the first PUSCH transmitted by the first antenna panel and second configuration information of the second DMRS corresponding to the second PUSCH transmitted by the second antenna panel.

[0310] The first configuration information is the same as the second configuration information in terms of DMRS mapping type, DMRS configuration type, and single / double symbol number configuration, and the first configuration information and the second configuration information indicate the same position of the first DMRS symbol in the time slot.

[0311] In an optional embodiment, 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 belongs to the same CDM group. This is applicable when the first antenna panel and the second antenna panel send PUSCH to different TRPs.

[0312] In an optional embodiment, the two antenna panels include a first antenna panel and a second antenna panel;

[0313] The receiving module 501 is used to receive first downlink control information (DCI) through the first antenna panel. The first DCI is used to schedule the first antenna panel to send a first PUSCH at the first transmission time.

[0314] The receiving module 501 is used to receive the second DCI through the second antenna panel, and the second DCI is used to schedule the second antenna panel to send the second PUSCH at the second transmission time.

[0315] The first transmission timing and the second transmission timing have partially or completely overlapping time-frequency resources.

[0316] In an optional embodiment, the DMRS configuration information is also used for rate matching of the PUSCH data portions of the two antenna panels; the DMRS configuration information includes a target field, which is used to indicate a CDM group that cannot be multiplexed with the data portions transmitted with the PUSCH.

[0317] In an optional embodiment, the receiving module 501 is configured to receive a first target field sent by the access network device through the first antenna panel, wherein the code point correspondence information of the first target field is used to indicate that the time-frequency resources corresponding to the second CDM group / the second CDM group set cannot be multiplexed with the data portion transmitted by PUSCH.

[0318] And / or, receive the second target field sent by the access network device through the second antenna panel, wherein the code point correspondence information of the second target field is used to indicate that the time-frequency resources corresponding to the first CDM group / first CDM group set cannot be multiplexed with the data portion transmitted by PUSCH.

[0319] In an optional embodiment, the first target field and / or the second target field are non-reusable CDM group fields in the antenna port domain.

[0320] In an optional embodiment, the apparatus further includes:

[0321] Rate matching module 502 is used to perform rate matching of the data portion of the first PUSCH according to the code point of the first target field;

[0322] And / or,

[0323] The rate matching module 502 is used to perform rate matching of the data portion of the second PUSCH according to the code point of the second target field.

[0324] Figure 22 This illustration shows a structural block diagram of a configuration apparatus for a demodulation reference signal (DMRS) provided in an exemplary embodiment of this application. The apparatus can be implemented as an access network device, or as part of an access network device. The apparatus includes:

[0325] The transmitting module 503 is used to transmit configuration information of the demodulation reference signal DMRS of the uplink shared channel PUSCH to the terminal;

[0326] In the transmission configuration where multiple downlink control information (DCI) scheduling terminals transmit STxMP uplink simultaneously based on up to two antenna panels, the DMRS configuration information is used to instruct the terminal to send the corresponding PUSCH DMRS through the up to two antenna panels according to the configuration information.

[0327] In an optional embodiment, the at most two antenna panels include a first antenna panel and a second antenna panel;

[0328] The configuration information of the DMRS is used to configure the first DMRS of the first PUSCH transmitted through the first antenna panel to correspond to the first code division multiplexing (CDM) group or the first CDM group set, and the second DMRS of the second PUSCH transmitted through the second antenna panel to correspond to the second CDM group or the second CDM group set.

[0329] In an optional embodiment, there are no 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;

[0330] Wherein, 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, including at least one of the following situations:

[0331] The first CDM group and the second CDM group are different CDM groups; the first CDM group set does not contain the second CDM group; the second CDM group set does not contain the first CDM group; and the first CDM group set and the second CDM group set do not contain the same CDM group.

[0332] In an optional embodiment, the configuration information of the DMRS includes first configuration information of the first DMRS corresponding to the first PUSCH transmitted by the first antenna panel and second configuration information of the second DMRS corresponding to the second PUSCH transmitted by the second antenna panel.

[0333] The first configuration information and the second configuration information differ in at least one of the following configurations: DMRS mapping type, DMRS configuration type, and single / double symbol number configuration; or the first configuration information and the second configuration information indicate different positions of the first DMRS symbol in the time slot.

[0334] In an optional 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 applicable to scenarios where the first antenna panel and the second antenna panel respectively send their respective PUSCHs to the same transmission receiving point TRP.

[0335] In an optional 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 applicable to scenarios where the first antenna panel and the second antenna panel send their respective PUSCHs to different TRPs.

[0336] In an optional embodiment, 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 belong to the same CDM group;

[0337] Wherein, 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 belong to the same CDM group, including at least one of the following situations:

[0338] The first CDM group and the second CDM group are the same CDM group; the first CDM group set contains the second CDM group; the second CDM group set contains the first CDM group; the first CDM group set and the second CDM group set contain at least one identical CDM group.

[0339] In an optional embodiment, the configuration information of the DMRS includes first configuration information of the first DMRS corresponding to the first PUSCH transmitted by the first antenna panel and second configuration information of the second DMRS corresponding to the second PUSCH transmitted by the second antenna panel.

[0340] The first configuration information is the same as the second configuration information in terms of DMRS mapping type, DMRS configuration type, and single / double symbol number configuration, and the first configuration information and the second configuration information indicate the same position of the first DMRS symbol in the time slot.

[0341] In an optional embodiment, 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 belongs to the same CDM group. This is applicable when the first antenna panel and the second antenna panel send PUSCH to different TRPs.

[0342] In an optional embodiment, the at most two antenna panels include a first antenna panel and a second antenna panel;

[0343] The transmitting module 503 is used to send a first downlink control information (DCI) to the first antenna panel. The first DCI is used to schedule the first antenna panel to send a first PUSCH at the first transmission time.

[0344] And / or, send a second DCI to the second antenna panel, the second DCI being used to schedule the second antenna panel to send a second PUSCH at a second transmission timing;

[0345] The first transmission timing and the second transmission timing have partially or completely overlapping time-frequency resources.

[0346] In an optional embodiment, the DMRS configuration information is further used for rate matching of the PUSCH data portions of the up to two antenna panels; the DMRS configuration information includes a target field for indicating a CDM group that cannot be multiplexed with the data portions transmitted with the PUSCH.

[0347] In an optional embodiment, the transmitting module 503 is configured to transmit a first target field to the first antenna panel, wherein the code point correspondence information of the first target field is used to indicate that the time-frequency resources corresponding to the second CDM group / the second CDM group set cannot be multiplexed with the data portion transmitted by PUSCH.

[0348] And / or, send a second target field to the second antenna panel, wherein the code point correspondence information of the second target field is used to indicate that the time-frequency resources corresponding to the first CDM group cannot be multiplexed with the data portion transmitted by the PUSCH.

[0349] In an optional embodiment, the first target field and / or the second target field are non-reusable CDM group fields in the antenna port domain.

[0350] In an optional embodiment, the code points of the first target field are used to perform rate matching of the data portion of the first PUSCH;

[0351] And / or,

[0352] The code points of the second target field are used to perform rate matching on the data portion of the second PUSCH.

[0353] Figure 23 The diagram shows a schematic representation of a communication device (terminal or network device) provided in an exemplary embodiment of this application. The communication device includes a processor 101, a receiver 102, a transmitter 103, a memory 104, and a bus 105.

[0354] The processor 101 includes one or more processing cores. The processor 101 executes various functional applications and information processing by running software programs and modules.

[0355] The receiver 102 and the transmitter 103 can be implemented as a communication component, which can be a communication chip.

[0356] The memory 104 is connected to the processor 101 via the bus 105.

[0357] The memory 104 can be used to store at least one instruction, and the processor 101 can execute the at least one instruction to implement the various steps in the above method embodiments.

[0358] Furthermore, the memory 104 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic disks or optical disks, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), static random access memory (SRAM), read-only memory (ROM), magnetic storage, flash memory, and programmable read-only memory (PROM).

[0359] When the communication device is implemented as a terminal, the processor and transceiver in the communication device involved in the embodiments of this application can execute the steps performed by the terminal in any of the methods shown above, which will not be repeated here.

[0360] In one possible implementation, when the communication device is implemented as a terminal,

[0361] The transceiver is used to receive configuration information of the demodulation reference signal DMRS of the uplink shared channel PUSCH sent by the access network device;

[0362] In the transmission configuration where multiple downlink control information (DCI) scheduling terminals simultaneously transmit STxMP uplink based on two antenna panels, the DMRS configuration information is used to instruct the terminal to send the corresponding PUSCH DMRS through the two antenna panels according to the configuration information.

[0363] When the communication device is implemented as a network device, the processor and transceiver in the communication device involved in the embodiments of this application can execute the steps performed by the network device in any of the methods shown above, which will not be repeated here.

[0364] In one possible implementation, when the communication device is implemented as a network device,

[0365] The transceiver is used to send configuration information of the demodulation reference signal DMRS of the uplink shared channel PUSCH to the terminal.

[0366] In the transmission configuration where multiple downlink control information (DCI) scheduling terminals simultaneously transmit STxMP uplink based on two antenna panels, the DMRS configuration information is used to instruct the terminal to send the corresponding PUSCH DMRS through the two antenna panels according to the configuration information.

[0367] In an exemplary embodiment, a computer-readable storage medium is also provided, which stores at least one instruction, at least one program, code set, or instruction set, wherein the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by a processor to implement the configuration method of demodulation reference signal DMRS executed by a communication device provided in the above-described method embodiments.

[0368] In an exemplary embodiment, a chip is also provided, the chip including programmable logic circuitry and / or program instructions, which, when the chip is run on a computer device, are used to implement the configuration method for the demodulation reference signal DMRS described above.

[0369] 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 configuration method for the demodulation reference signal DMRS described above.

[0370] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0371] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for configuring a demodulation reference signal DMRS, characterized in that, The method is executed by a terminal, and the method includes: The first antenna panel receives a first downlink control information (DCI), which is used to schedule the first antenna panel to send a first PUSCH at a first transmission time. The first DCI carries configuration information of the first demodulation reference signal (DMRS) corresponding to the first PUSCH sent by the first antenna panel. The second antenna panel receives a second DCI, which is used to schedule the second antenna panel to send a second PUSCH at a second transmission timing. The first transmission timing and the second transmission timing have partially or completely overlapping time-frequency resources. The second DCI carries the configuration information of the second DMRS corresponding to the second PUSCH sent by the second antenna panel. The first DCI also carries a first target field, which indicates that the time-frequency resources corresponding to the CDM group / CDM group set corresponding to the second DMRS cannot be multiplexed with the data portion transmitted by the first PUSCH; the terminal performs rate matching of the data portion of the first PUSCH according to the code point of the first target field; The second DCI also carries a second target field, which indicates that the time-frequency resources corresponding to the CDM group / CDM group set corresponding to the first DMRS cannot be multiplexed with the data portion transmitted by the second PUSCH; the terminal performs rate matching of the data portion of the second PUSCH according to the code point of the second target field; wherein, under the transmission configuration of simultaneous uplink transmission of STxMP based on two antenna panels by scheduling the terminal through multiple downlink control information DCIs, the configuration information of the DMRS is used to instruct the terminal to send the DMRS of the corresponding PUSCH through the two antenna panels respectively according to the configuration information; There are no 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.

2. The method according to claim 1, characterized in that, The two antenna panels include a first antenna panel and a second antenna panel; The configuration information of the DMRS is used to configure the first DMRS of the first PUSCH transmitted through the first antenna panel to correspond to the first code division multiplexing (CDM) group or the first CDM group set, and the second DMRS of the second PUSCH transmitted through the second antenna panel to correspond to the second CDM group or the second CDM group set.

3. The method according to claim 2, characterized in that, in, The following situations apply when there are no 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: The first CDM group and the second CDM group are different CDM groups; the first CDM group set does not contain the second CDM group; the second CDM group set does not contain the first CDM group; and the first CDM group set and the second CDM group set do not contain the same CDM group.

4. The method according to claim 3, characterized in that, The configuration information of the DMRS includes the first configuration information of the first DMRS corresponding to the first PUSCH transmitted by the first antenna panel and the second configuration information of the second DMRS corresponding to the second PUSCH transmitted by the second antenna panel. The first configuration information and the second configuration information differ in at least one of the following configurations: DMRS mapping type, DMRS configuration type, and single / double symbol number configuration; or the first configuration information and the second configuration information indicate different positions of the first DMRS symbol in the time slot.

5. The method according to claim 3, characterized in that, The scenario where there are no 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 applicable to the scenario where the first antenna panel and the second antenna panel send their respective PUSCHs to the same transmission receiving point TRP.

6. The method according to claim 3, characterized in that, The scenario where there are no 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 applicable to scenarios where the first antenna panel and the second antenna panel send their respective PUSCH to different TRPs.

7. The method according to claim 2, characterized in that, 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 belong to the same CDM group; Wherein, 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 belong to the same CDM group, including at least one of the following situations: The first CDM group and the second CDM group are the same CDM group; the first CDM group set contains the second CDM group; the second CDM group set contains the first CDM group; the first CDM group set and the second CDM group set contain at least one identical CDM group.

8. The method according to claim 7, characterized in that, The configuration information of the DMRS includes the first configuration information of the first DMRS corresponding to the first PUSCH transmitted by the first antenna panel and the second configuration information of the second DMRS corresponding to the second PUSCH transmitted by the second antenna panel. The first configuration information is the same as the second configuration information in terms of DMRS mapping type, DMRS configuration type, and single / double symbol number configuration, and the first configuration information and the second configuration information indicate the same position of the first DMRS symbol in the time slot.

9. The method according to claim 7, characterized in that, The fact that 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 belongs to the same CDM group is applicable when the first antenna panel and the second antenna panel send PUSCH to different TRPs.

10. The method according to any one of claims 1 to 9, characterized in that, The DMRS configuration information is also used for rate matching of the PUSCH data portion of the two antenna panels; the DMRS configuration information includes a target field, which is used to indicate the CDM group that cannot be multiplexed with the data portion transmitted with the PUSCH.

11. A method for configuring a demodulation reference signal DMRS, characterized in that, The method is executed by an access network device, and the method includes: Send a first downlink control information (DCI) to the first antenna panel. The first DCI is used to schedule the first antenna panel to send a first PUSCH at the first transmission time. The first DCI carries configuration information of the first demodulation reference signal (DMRS) corresponding to the first PUSCH sent by the first antenna panel. A second DCI is sent to the second antenna panel. The second DCI is used to schedule the second antenna panel to send a second PUSCH at a second transmission timing. The first transmission timing and the second transmission timing have partially or completely overlapping time-frequency resources. The second DCI carries the configuration information of the second DMRS corresponding to the second PUSCH sent by the second antenna panel. The first DCI also carries a first target field, which indicates that the time-frequency resources corresponding to the CDM group / CDM group set corresponding to the second DMRS cannot be multiplexed with the data portion transmitted by the first PUSCH; the terminal performs rate matching of the data portion of the first PUSCH according to the code point of the first target field; The second DCI also carries a second target field, which indicates that the time-frequency resources corresponding to the CDM group / CDM group set corresponding to the first DMRS cannot be multiplexed with the data portion transmitted by the second PUSCH; the terminal performs rate matching of the data portion of the second PUSCH according to the code point of the second target field; In the transmission configuration where multiple downlink control information (DCI) scheduling terminals transmit STxMP simultaneously uplink based on two antenna panels, the DMRS configuration information is used to instruct the terminal to send the corresponding PUSCH DMRS through the two antenna panels according to the configuration information. There are no 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.

12. The method according to claim 11, characterized in that, The two antenna panels include a first antenna panel and a second antenna panel; The configuration information of the DMRS is used to configure the first DMRS of the first PUSCH transmitted through the first antenna panel to correspond to the first code division multiplexing (CDM) group or the first CDM group set, and the second DMRS of the second PUSCH transmitted through the second antenna panel to correspond to the second CDM group or the second CDM group set.

13. The method according to claim 12, characterized in that, in, The following situations apply when there are no 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: The first CDM group and the second CDM group are different CDM groups; the first CDM group set does not contain the second CDM group; the second CDM group set does not contain the first CDM group; and the first CDM group set and the second CDM group set do not contain the same CDM group.

14. The method according to claim 13, characterized in that, The configuration information of the DMRS includes the first configuration information of the first DMRS corresponding to the first PUSCH transmitted by the first antenna panel and the second configuration information of the second DMRS corresponding to the second PUSCH transmitted by the second antenna panel. The first configuration information and the second configuration information differ in at least one of the following configurations: DMRS mapping type, DMRS configuration type, and single / double symbol number configuration; or the first configuration information and the second configuration information indicate different positions of the first DMRS symbol in the time slot.

15. The method according to claim 13, characterized in that, The scenario where there are no 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 applicable to the scenario where the first antenna panel and the second antenna panel send their respective PUSCHs to the same transmission receiving point TRP.

16. The method according to claim 13, characterized in that, The scenario where there are no 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 applicable to scenarios where the first antenna panel and the second antenna panel send their respective PUSCH to different TRPs.

17. The method according to claim 12, characterized in that, 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 belong to the same CDM group; Wherein, 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 belong to the same CDM group, including at least one of the following situations: The first CDM group and the second CDM group are the same CDM group; the first CDM group set contains the second CDM group; the second CDM group set contains the first CDM group; the first CDM group set and the second CDM group set contain at least one identical CDM group.

18. The method according to claim 17, characterized in that, The configuration information of the DMRS includes the first configuration information of the first DMRS corresponding to the first PUSCH transmitted by the first antenna panel and the second configuration information of the second DMRS corresponding to the second PUSCH transmitted by the second antenna panel. The first configuration information is the same as the second configuration information in terms of DMRS mapping type, DMRS configuration type, and single / double symbol number configuration, and the first configuration information and the second configuration information indicate the same position of the first DMRS symbol in the time slot.

19. The method according to claim 17, characterized in that, The fact that 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 belongs to the same CDM group is applicable when the first antenna panel and the second antenna panel send PUSCH to different TRPs.

20. The method according to any one of claims 11 to 19, characterized in that, The DMRS configuration information is also used for rate matching of the PUSCH data portion of the two antenna panels; the DMRS configuration information includes a target field, which is used to indicate the CDM group that cannot be multiplexed with the data portion transmitted with the PUSCH.

21. A configuration apparatus for a demodulation reference signal DMRS, characterized in that, The device includes: The receiving module is used to receive first downlink control information (DCI) through the first antenna panel. The first DCI is used to schedule the first antenna panel to send a first PUSCH at the first transmission time. The first DCI carries configuration information of the first demodulation reference signal (DMRS) corresponding to the first PUSCH sent by the first antenna panel. The receiving module is used to receive a second DCI through the second antenna panel. The second DCI is used to schedule the second antenna panel to send a second PUSCH at a second transmission timing. The first transmission timing and the second transmission timing have partially or completely overlapping time-frequency resources. The second DCI carries the configuration information of the second DMRS corresponding to the second PUSCH sent by the second antenna panel. The first DCI also carries a first target field, which indicates that the time-frequency resources corresponding to the CDM group / CDM group set corresponding to the second DMRS cannot be multiplexed with the data portion transmitted by the first PUSCH; the terminal performs rate matching of the data portion of the first PUSCH according to the code point of the first target field; The second DCI also carries a second target field, which indicates that the time-frequency resources corresponding to the CDM group / CDM group set corresponding to the first DMRS cannot be multiplexed with the data portion transmitted by the second PUSCH; the terminal performs rate matching of the data portion of the second PUSCH according to the code point of the second target field; In the transmission configuration where multiple downlink control information (DCI) scheduling terminals transmit STxMP simultaneously uplink based on two antenna panels, the DMRS configuration information is used to instruct the terminal to send the corresponding PUSCH DMRS through the two antenna panels according to the configuration information. There are no 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.

22. A configuration apparatus for a demodulation reference signal DMRS, characterized in that, The apparatus is used to implement an access network device, and the apparatus includes: The transmitting module is used to transmit first downlink control information (DCI) to the first antenna panel. The first DCI is used to schedule the first antenna panel to transmit a first PUSCH at a first transmission time. The first DCI carries configuration information of the first demodulation reference signal (DMRS) corresponding to the first PUSCH transmitted by the first antenna panel. The transmitting module is used to transmit a second DCI to the second antenna panel. The second DCI is used to schedule the second antenna panel to transmit a second PUSCH at a second transmission timing. The first transmission timing and the second transmission timing have partially or completely overlapping time-frequency resources. The second DCI carries the configuration information of the second DMRS corresponding to the second PUSCH transmitted by the second antenna panel. The first DCI also carries a first target field, which indicates that the time-frequency resources corresponding to the CDM group / CDM group set corresponding to the second DMRS cannot be multiplexed with the data portion transmitted by the first PUSCH; the terminal performs rate matching of the data portion of the first PUSCH according to the code point of the first target field; The second DCI also carries a second target field, which indicates that the time-frequency resources corresponding to the CDM group / CDM group set corresponding to the first DMRS cannot be multiplexed with the data portion transmitted by the second PUSCH; the terminal performs rate matching of the data portion of the second PUSCH according to the code point of the second target field; In the transmission configuration where multiple downlink control information (DCI) scheduling terminals simultaneously transmit STxMP uplink based on two antenna panels, the DMRS configuration information is used to instruct the terminal to send the corresponding PUSCH DMRS through the two antenna panels according to the configuration information. There are no 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.

23. A terminal, characterized in that, The terminal includes: a processor and a transceiver connected to the processor; wherein, The transceiver is used to receive first downlink control information (DCI) through the first antenna panel. The first DCI is used to schedule the first antenna panel to send a first PUSCH at the first transmission time. The first DCI carries configuration information of the first demodulation reference signal (DMRS) corresponding to the first PUSCH sent by the first antenna panel. The second antenna panel receives a second DCI, which is used to schedule the second antenna panel to send a second PUSCH at a second transmission timing. The first transmission timing and the second transmission timing have partially or completely overlapping time-frequency resources. The second DCI carries the configuration information of the second DMRS corresponding to the second PUSCH sent by the second antenna panel. The first DCI also carries a first target field, which indicates that the time-frequency resources corresponding to the CDM group / CDM group set corresponding to the second DMRS cannot be multiplexed with the data portion transmitted by the first PUSCH; the terminal performs rate matching of the data portion of the first PUSCH according to the code point of the first target field; The second DCI also carries a second target field, which indicates that the time-frequency resources corresponding to the CDM group / CDM group set corresponding to the first DMRS cannot be multiplexed with the data portion transmitted by the second PUSCH; the terminal performs rate matching of the data portion of the second PUSCH according to the code point of the second target field; In the transmission configuration where multiple downlink control information (DCI) scheduling terminals transmit STxMP simultaneously uplink based on two antenna panels, the DMRS configuration information is used to instruct the terminal to send the corresponding PUSCH DMRS through the two antenna panels according to the configuration information. There are no 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.

24. A network device, characterized in that, The network device includes: a processor and a transceiver connected to the processor; wherein, The transceiver is used to send a first downlink control information (DCI) to the first antenna panel. The first DCI is used to schedule the first antenna panel to send a first PUSCH at a first transmission time. The first DCI carries configuration information of a first demodulation reference signal (DMRS) corresponding to the first PUSCH sent by the first antenna panel. The transceiver is used to send a second DCI to the second antenna panel. The second DCI is used to schedule the second antenna panel to send a second PUSCH at a second transmission timing. The first transmission timing and the second transmission timing have partially or completely overlapping time-frequency resources. The second DCI carries the configuration information of the second DMRS corresponding to the second PUSCH sent by the second antenna panel. The first DCI also carries a first target field, which indicates that the time-frequency resources corresponding to the CDM group / CDM group set corresponding to the second DMRS cannot be multiplexed with the data portion transmitted by the first PUSCH; the terminal performs rate matching of the data portion of the first PUSCH according to the code point of the first target field; The second DCI also carries a second target field, which indicates that the time-frequency resources corresponding to the CDM group / CDM group set corresponding to the first DMRS cannot be multiplexed with the data portion transmitted by the second PUSCH; the terminal performs rate matching of the data portion of the second PUSCH according to the code point of the second target field; wherein, under the transmission configuration of simultaneous uplink transmission of STxMP based on two antenna panels by scheduling the terminal through multiple downlink control information DCIs, the configuration information of the DMRS is used to instruct the terminal to send the DMRS of the corresponding PUSCH through the two antenna panels respectively according to the configuration information; There are no 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.

25. A computer-readable storage medium, characterized in that, The readable storage medium stores executable instructions that are loaded and executed by a processor to implement the configuration method of the demodulation reference signal DMRS as described in any one of claims 1 to 20.

26. A chip, characterized in that, The chip includes programmable logic circuitry or a program, and the chip is used to implement the configuration method of the demodulation reference signal DMRS as described in any one of claims 1 to 20.

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