Transmission method over data shared channel, terminal, and network side device

Abstract

The present application relates to the technical field of communications, and discloses a transmission method over a data shared channel, a terminal, and a network side device. The transmission method over a data shared channel of embodiments of the present application comprises: when determining that a first rule is satisfied, a terminal determines that an additional demodulation reference signal (DMRS) associated with a data shared channel does not exist; and the terminal uses a resource corresponding to the additional DMRS as a resource carrying at least part of the data shared channel.

Description

Data sharing channel transmission methods, terminals, and network-side equipment

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202410930532.9, filed on July 11, 2024, entitled “Transmission Method, Terminal and Network Side Device for Data Sharing Channel”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application belongs to the field of communication technology, specifically relating to a data sharing channel transmission method, terminal, and network-side equipment. Background Technology

[0004] In relevant wireless communication systems, demodulation of both the Physical Downlink Shared Channel (PDSCH) and the Physical Uplink Shared Channel (PUSCH) relies on the configuration of their associated Demodulation Reference Signal (DMRS). The main parameters of the DMRS configuration are generally indicated jointly by higher-layer Radio Resource Control (RRC) signaling and Downlink Control Information (DCI).

[0005] For the DMRS design of NRRel15, in order to reduce DMRS overhead, the protocol allows the use of single-symbol DMRS to support transmission on low-rank data sharing channels (or service channels) with a small number of data streams. However, for high-rank data sharing channels with a large number of data streams (e.g., 7 or 8 data streams), only double-symbol DMRS can be used to support transmission.

[0006] To ensure channel estimation performance in mobile or low signal-to-noise ratio (SNR) scenarios, networks typically configure additional DMRS for terminals via higher-layer signaling. However, for scenarios with a large number of data streams, where terminals generally operate at low speeds and high SNR, the additional DMRS offers limited improvement in channel estimation performance. In fact, the time-frequency resource overhead of both the dual-symbol DMRS and the additional DMRS leads to a decrease in the spectral efficiency of the actual service channel. Summary of the Invention

[0007] This application provides a data sharing channel transmission method, terminal, and network-side device, which can solve the problems of low spectral efficiency and throughput loss in the transmission of high-rank interval data streams in related technologies.

[0008] Firstly, a method for transmitting data through a shared channel is provided, the method comprising:

[0009] If the terminal determines that the first rule is met, it will find that the additional demodulation reference signal DMRS associated with the data sharing channel does not exist;

[0010] The terminal uses the resources corresponding to the additional DMRS as resources to carry at least a portion of the data sharing channel.

[0011] Secondly, a method for transmitting data through a shared channel is provided, the method comprising:

[0012] The network-side equipment sends the Demodulation Reference Signal (DMRS) configuration information associated with the Data Sharing Channel to the terminal;

[0013] If the network-side device determines that the additional DMRS associated with the data sharing channel does not exist, the first rule must be met.

[0014] The network-side device uses the resources corresponding to the additional DMRS as resources to carry at least a portion of the data sharing channel.

[0015] Thirdly, a data sharing channel transmission device is provided, comprising:

[0016] The processing module is used to determine that the additional demodulation reference signal DMRS associated with the data sharing channel does not exist if the first rule is satisfied.

[0017] A channel transmission module is used to use the resources corresponding to the additional DMRS as resources to carry at least a portion of the data sharing channel.

[0018] Fourthly, a data sharing channel transmission apparatus is provided, comprising:

[0019] The information configuration module is used to send the demodulation reference signal (DMRS) configuration information associated with the data sharing channel to the terminal.

[0020] The processing module is used to determine that, if the first rule is satisfied, the additional DMRS associated with the data sharing channel does not exist;

[0021] A channel transmission module is used to use the resources corresponding to the additional DMRS as resources to carry at least a portion of the data sharing channel.

[0022] Fifthly, a data sharing channel transmission apparatus is provided, the apparatus being configured to perform the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0023] In a sixth aspect, a terminal is provided, the terminal including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect.

[0024] In a seventh aspect, a terminal is provided, including a processor and a communication interface, wherein the processor is configured to determine, upon determining that a first rule is satisfied, that an additional demodulation reference signal (DMRS) associated with a data sharing channel does not exist, and the communication interface is configured to use the resources corresponding to the additional DMRS as resources for carrying at least a portion of the data sharing channel.

[0025] Eighthly, a network-side device is provided, the network-side device including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the second aspect.

[0026] A ninth aspect provides a network-side device, including a processor and a communication interface, wherein the processor is configured to determine, upon determining that a data sharing channel associated with an additional demodulation reference signal (DMRS) does not exist, provided that a first rule is satisfied, and the communication interface is configured to send DMRS configuration information associated with the data sharing channel to a terminal, and to use the resources corresponding to the additional DMRS as resources for carrying at least a portion of the data sharing channel.

[0027] In a tenth aspect, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect.

[0028] Eleventhly, a wireless communication system is provided, comprising: a terminal and a network-side device, wherein the terminal can be used to perform the steps of the method as described in the first aspect, and the network-side device can be used to perform the steps of the method as described in the second aspect.

[0029] In a twelfth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being configured to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0030] In a thirteenth aspect, a computer program / program product is provided, which is stored in a storage medium and executed by at least one processor to implement the steps of the data sharing channel transmission method as described in the first or second aspect.

[0031] In this embodiment of the application, the terminal can determine that the additional DMRS associated with the data sharing channel does not exist when the first rule is met, and use the resources occupied by the additional DMRS as resources to carry at least part of the data sharing channel. This increases the resources used to transmit the data sharing channel, thereby improving spectral efficiency. In high-rank transmission scenarios, it can ensure that the throughput gain is not lost, or reduce the loss of throughput gain. Attached Figure Description

[0032] Figure 1 is a block diagram of a wireless communication system applicable to an embodiment of this application.

[0033] Figure 2 is a schematic flowchart of a data sharing channel transmission method provided in an embodiment of this application.

[0034] Figure 3 is a flowchart illustrating a data sharing channel transmission method according to another embodiment of this application.

[0035] Figure 4 is a flowchart illustrating a data sharing channel transmission method according to another embodiment of this application.

[0036] Figure 5 is a schematic diagram of the structure of a data sharing channel transmission device according to an embodiment of this application.

[0037] Figure 6 is a schematic diagram of the structure of a data sharing channel transmission device according to another embodiment of this application.

[0038] Figure 7 is a schematic diagram of the structure of a data sharing channel transmission device according to another embodiment of this application.

[0039] Figure 8 is a schematic diagram of the structure of a communication device proposed in an embodiment of this application.

[0040] Figure 9 is a schematic diagram of the structure of a terminal proposed in an embodiment of this application.

[0041] Figure 10 is a schematic diagram of the structure of a network-side device proposed in an embodiment of this application. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0043] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, the scope of protection for "A or B" covers at least three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. In addition, the terms "A and / or B," "at least one of A and B," and "at least one of A or B" also cover at least the above three scenarios. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0044] The term "instruction" in this application can be either a direct instruction (or explicit instruction) or an indirect instruction (or implicit instruction). A direct instruction can be understood as one in which the sender explicitly informs the receiver of specific information, the operation to be performed, or the requested result, etc., in the instruction sent. An indirect instruction can be understood as one in which the receiver determines the corresponding information based on the instruction sent by the sender, or makes a judgment and determines the operation to be performed or the requested result, etc., based on the judgment result.

[0045] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), or other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and the term NR is used in most of the following description; however, these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0046] Figure 1 shows a block diagram of a wireless communication system applicable to an embodiment of this application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can be a mobile phone, tablet computer, laptop computer, notebook computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR), virtual reality (VR) device, robot, wearable device, flight vehicle, vehicle user equipment (VUE), shipboard equipment, pedestrian user equipment (PUE), smart home (home devices with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game console, personal computer (PC), ATM, or self-service machine, etc. Wearable devices include: smartwatches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among these, in-vehicle devices can also be referred to as in-vehicle terminals, in-vehicle controllers, in-vehicle modules, in-vehicle components, in-vehicle chips, or in-vehicle units, etc. It should be noted that the specific type of terminal 11 is not limited in this application embodiment. Network-side equipment 12 may include access network equipment or core network equipment, wherein access network equipment may also be referred to as Radio Access Network (RAN) equipment, radio access network function, or radio access network unit. Access network equipment may include base stations, Wireless Local Area Network (WLAN) access points (AS), or Wireless Fidelity (WiFi) nodes, etc.In this context, a base station may be referred to as a NodeB (NB), Evolved NodeB (eNB), Next Generation NodeB (gNB), New Radio NodeB (NRNodeB), Access Point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), Radio Base Station, Radio Transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home NodeB (HNB), Home Evolved NodeB, Transmit / Receive Point (TRP), or any other suitable term in the relevant field, as long as the same technical effect is achieved. The base station is not limited to any specific technical terminology. It should be noted that in this application embodiment, only a base station in an NR system is used as an example for introduction, and the specific type of base station is not limited.

[0047] Core network equipment, also known as core network nodes, core network functions, or core network elements, includes, but is not limited to, at least one of the following: Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), and Unified Data Warehouse (UDM). The core network equipment includes ataRepository (UDR), Home Subscriber Server (HSS), Centralized Network Configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (Local NEF, or L-NEF), Binding Support Function (BSF), Application Function (AF), Location Management Function (LMF), Gateway Mobile Location Centre (GMLC), and Network Data Analytics Function (NWDAF). It should be noted that this application only uses core network equipment in the NR system as an example and does not limit the specific type of core network equipment. If the name of the core network equipment mentioned in this application changes in subsequent protocol versions (e.g., 6G), it will still be within the scope of protection of this application.

[0048] Optionally, the core network equipment can be implemented by one or more functional modules in a single device, or by multiple devices working together; this application does not specifically limit this. It is understood that the aforementioned functional modules can be network elements in hardware devices, software functional modules running on dedicated hardware, or virtualized functional modules instantiated on a platform (e.g., a cloud platform).

[0049] The following description, in conjunction with the accompanying drawings, details a data sharing channel transmission method provided by the embodiments of this application through some examples and application scenarios.

[0050] In some embodiments, as shown in FIG2, a data sharing channel transmission method provided in this application embodiment may include:

[0051] Step 201: The terminal receives the configuration information of the demodulation reference signal (DMRS) associated with the data sharing channel.

[0052] The data sharing channel may include, but is not limited to, at least one of the Physical Downlink Shared Channel (PDSCH) and the Physical Uplink Shared Channel (PUSCH).

[0053] DMRS configuration information is generally indicated by network-side devices through a combination of higher-layer Radio Resource Control (RRC) signaling and downlink control information (DCI).

[0054] The main parameters in the DMRS configuration information may be indicated by RRC signaling, and the main parameters in the DMRS configuration information may include, but are not limited to, at least one of the following:

[0055] DMRS configuration type, wherein the DMRS configuration type includes type 1 or type 2;

[0056] Additional DMRS configuration information;

[0057] Maximum length of the front DMRS.

[0058] Both DMRS type 1 and DMRS type 2 support single-symbol DM-RS and double-symbol DM-RS structures.

[0059] For example, in RRC signaling, the main parameters in the DMRS configuration information are configured through IEDMRS-DownlinkConfig, as follows:

[0060] DMRS-DownlinkConfig::=SEQUENCE{

[0061] dmrs-Type: Indicates whether the DMRS configuration type is DMRS type 1 or DMRS type 2.

[0062] dmrs-AdditionalPosition: Used to indicate the additional DMRS configuration in the time dimension of the DMRS within the time slot.

[0063] maxLength: Indicates the maximum number of OFDM symbols that the frontloaded DMRS can occupy, with a value of 1 or 2.

[0064] }

[0065] It should be noted that if an additional DMRS exists, the parameter maxLength also applies to the additional DMRS.

[0066] As an example, the parameter descriptions for PDSCHDMRS type 1 are shown in Table 1-1 below, and the parameter descriptions for PDSCHDMRS type 2 are shown in Table 1-2 below.

[0067] Table 1-1 Parameter Description of PDSCHDMRS Type 1

[0068] Table 1-2 Parameter Description of PDSCHDMRS Type 2

[0069] In Tables 1-1 and 1-2, p represents the DMRS port, CDM group refers to the Code Division Multiplexing group (CDM group), and the physical meaning of the other parameters can be found in the NRRel15 protocol.

[0070] As an example, the PDSCHDMRS positions for single-symbol DMRS are shown in Table 2-1 below, and the PDSCHDMRS positions for double-symbol DMRS are shown in Table 2-2 below.

[0071] Table 2-1 PDSCHDMRS positions for single-symbol DMRS for single-symbol DM-RS)

[0072] Table 2-2 PDSCHDMRS positions for double-symbol DMRS for double-symbolDM-RS)

[0073] In Tables 2-1 and 2-2, l0 represents the starting OFDM symbol index where the front-loaded DMRS is located; if other values ​​are included, it represents the starting OFDM symbol index where the additional DMRS is located. For the physical meaning of the other parameters, please refer to the NRRel15 protocol.

[0074] Furthermore, other parameters in the DMRS configuration information are generally indicated by DCI signaling. Specifically, other DMRS-related parameters are indicated through the antenna ports field in the DCI signaling. For example, these related parameters may include the number of DMRS port combinations and the number of OFDM symbols actually occupied by the front-end DMRS. Table 3-1 below shows the DMRS-related parameters of PDSCH for DMRS type 1 indicated by DCI format 1-1, and Table 3-2 below shows the DMRS-related parameters of PDSCH for DMRS type 2 indicated by DCI format 1-1.

[0075] Table 3-1 Antenna Ports (1000+DMRS Ports), DMRS Type = 1, Maximum Length = 2 (Antennaport(s)(1000+DMRSport), dmrs-Type = 1, maxLength = 2)

[0076] Table 3-2 Antenna Ports (1000+DMRS Ports), DMRS Type = 2, Maximum Length = 2 (Antennaport(s)(1000+DMRSport), dmrs-Type = 2, maxLength = 2)

[0077] Based on the aforementioned DMRS configuration information regarding data sharing channel association, it is known that for the transmission of low-rank data streams, single-symbol DMRS can be used by instructing the DCI to ensure spectral efficiency. However, for the transmission of high-rank data streams, the DCI must instruct the use of double-symbol DMRS. While using double-symbol DMRS for high-rank data stream transmission better guarantees the accuracy of channel estimation, the excessive DMRS pilot overhead reduces spectral efficiency, leading to throughput loss, and the gain from high-rank transmission is not ideal.

[0078] For PDCSH transmission, taking a maximum Rank number of 8 supported by the terminal as an example, the current slot includes 14 OFDM symbols, where the first OFDM symbol is used to carry the DCI for scheduling PDSCH. Assume the higher-layer signaling configuration dmrs-AdditionalPosition is 'pos1', where 'pos1' indicates that there are two sets of DMRS in the time dimension, separated by a certain number of OFDM symbols (see Table 2-1 above for details). Also assume the higher-layer signaling configuration DMRSmaxLength = 2, meaning each set of DMRS can occupy 1 or 2 OFDM symbols.

[0079] Furthermore, assuming the DMRS configuration type of the higher-layer signaling is DMRS type 1, if the number of transmitted data streams of PDSCH is 4, then each group of DMRS only needs to occupy 1 OFDM symbol. Based on Table 3-1 mentioned above, it can be seen that no resources are allocated to data on the OFDM symbols occupied by DMRS. The actual number of OFDM symbols occupied by PDSCH data is 14-1-1-1=11, of which the 3 OFDM symbols that are subtracted are 1 occupied by DCI, 1 occupied by the front DMRS, and 1 occupied by the additional DMRS. Assuming throughput is calculated simply by multiplying the number of data streams and the number of data OFDM symbols, the throughput in this case is 4 * 11 = 44. If the number of data streams transmitted by PDSCH is greater than 4, for example, if the data stream is equal to one of {5, 6, 7, 8}, then each DMRS group must occupy 2 OFDM symbols. The actual number of PDSCH data OFDM symbols is 14 - 1 - 2 - 2 = 9, and the corresponding throughputs are {45, 54, 63, 72}. Compared with the throughput of 4 data streams, the actual improvements are {2%, 22%, 43%, 63%}, while the theoretical throughput gain should be {5, 6, 7, 8} / 4 = {25%, 50%, 75%, 100%}.

[0080] Furthermore, assuming the DMRS configuration type of the higher-layer signaling configuration is DMRS type 2, if the number of PDSCH transmission data streams is 6, then each DMRS group only needs to occupy 1 OFDM symbol. Based on Table 3-2 mentioned above, it can be seen that there are no resources allocated to the data on the DMRS OFDM symbol. The actual number of PDSCH data OFDM symbols is 14-1-1-1=11. Assuming throughput is calculated simply by multiplying the number of data streams by the number of data OFDM symbols, the throughput in this case is 6 * 11 = 66. If the number of data streams transmitted by the PDSCH is greater than 6, for example, data streams = {7, 8}, then each DMRS group must occupy 2 OFDM symbols. Based on Table 3-2 above, we know that 2 / 3 of the resources on the DMRS OFDM symbols are not allocated to data. The actual number of OFDM symbols occupied by the PDSCH is 14 - 1 - 2 / 3 * 2 * 2 = (10 + 1 / 3). The corresponding throughputs are (10 + 1 / 3) * {7, 8} = {72.3, 82.6}, which is an improvement of {9% and 25%} compared to the throughput of data streams = 6. The theoretical throughput gain should be {7, 8} / 66 = {16% and 33%}. Similarly, for cases where the number of transmitted data streams is 7 or 8, if no additional DMRS is transmitted, the throughput gain can be further improved, specifically by {23% and 41%} respectively.

[0081] The comparative analysis above shows that the current DMRS configuration is not realizing the theoretical gains of high-rank transmission. This is unless, during high-rank transmission, the dmrs-AdditionalPosition is modified to 'pos0' via higher-layer signaling. However, since rank adaptation is a rapidly changing process, modifying the configuration via semi-static RRC signaling cannot handle such rapid rank changes.

[0082] To address the aforementioned issues, this application provides an optimization scheme. The main idea is to consider that high-rank scenarios typically operate in low-speed scenarios, retain the pre-DMRS, and treat the additional DMRS as non-existent. In this way, within one time slot, the pre-DMRS occupies two OFDM symbols, while the additional DMRS does not occupy OFDM symbols (there is no additional DMRS). At this time, the number of OFDM symbols used for data transmission is 14-1-2=11, which is equal to the pilot overhead of low-rank scenarios. This will be explained in detail below.

[0083] In other embodiments, as shown in FIG3, a data sharing channel transmission method proposed in this application may include:

[0084] Step 202: If the terminal determines that the first rule is met, it determines that the additional DMRS associated with the data sharing channel does not exist.

[0085] Step 203: The terminal uses the resources corresponding to the additional DMRS as resources to carry at least a portion of the data sharing channel.

[0086] As mentioned above, the data sharing channel may include, but is not limited to, at least one of PDSCH and PUSCH. That is, when the terminal receives PDSCH or sends PUSCH, under the condition of satisfying a set rule - the first rule, it determines that the additional DMRS associated with PDSCH or PUSCH does not exist, that is, there is no additional DMRS, and the OFDM symbols originally designed to carry DMRS are used to carry the data channel (or service channel).

[0087] The resources corresponding to the additional DMRS are the resources configured or indicated by the network-side device for the additional DMRS.

[0088] The first rule is used to determine whether the data sharing channel meets at least one of the following conditions:

[0089] The rank of the data sharing channel is in the high-rank interval or the number of data streams transmitted by the data sharing channel is greater than a preset threshold. For example, when the DMRS configuration type of the data sharing channel is DMRS type 1, the rank or the number of data streams transmitted by the data sharing channel is greater than or equal to 4. When the DMRS configuration type of the data sharing channel is DMRS type 2, the rank of the data sharing channel is greater than or equal to 6.

[0090] The DMRS associated with the data sharing channel is a two-symbol DMRS.

[0091] This is because, under the above conditions, the data sharing channel suffers from low spectral efficiency and unsatisfactory throughput gain.

[0092] For example, the first rule may include, but is not limited to, at least one of the following:

[0093] 1) Both codewords corresponding to the data sharing channel are activated;

[0094] 2) The number of data streams transmitted through the data sharing channel is greater than the first threshold;

[0095] 3) The value indicated by the antenna port indication field in the first downlink control information (DCI) is a first value, wherein the first value is any one of the first value set, and the first value set is used to determine that the additional DMRS does not exist;

[0096] 4) The value indicated by the antenna port indication field in the first DCI is the second value, which is used to determine that the additional DMRS does not exist;

[0097] 5) The Time Domain Resource Allocation (TDRA) indication field in the first DCI indicates the first TDRA, wherein the first TDRA is a TDRA in the TDRA list configured to indicate that the additional DMRS does not exist;

[0098] 6) The index of the modulation and coding scheme (MCS) corresponding to the data sharing channel is greater than the second threshold;

[0099] 7) The DCI that schedules the data sharing channel includes a status indication field, and the status indication field indicates a second status. The status indication field is used to indicate one of a first status and a second status. The first status is different from the second status. The second status is used to indicate that the terminal determines that the additional DMRS associated with the data sharing channel does not exist.

[0100] 8) The terminal is instructed by the network-side device to have multiple DMRS configurations, including a first DMRS configuration, in which there is no additional DMRS, and the terminal receives an instruction to switch to the first DMRS;

[0101] 9) The Radio Resource Control (RRC) signaling received by the terminal contains the first parameter.

[0102] Wherein, the first DCI is the DCI that schedules the data sharing channel.

[0103] Wherein, at least one of the first threshold, the first set of values, the second value, and the second threshold can be determined by at least one of the following methods:

[0104] The agreement stipulates;

[0105] Network-side device configuration;

[0106] Terminal capabilities are specifically carried in the terminal capability reporting.

[0107] It should be noted that, in this application, the terminal determining that the additional DMRS associated with the data sharing channel does not exist indicates at least one of the following:

[0108] The DMRS associated with the data sharing channel only includes the front-end DMRS;

[0109] The location configuration information of the DMRS associated with the data sharing channel is temporarily modified to the first location information, wherein the first location information does not include the location information of the additional DMRS, such as "pos0" in Table 2-1.

[0110] In some embodiments, if the first rule includes: 2) the number of data streams transmitted through the data sharing channel is greater than a first threshold, and the first threshold is set by the network-side device, then if the network-side device does not configure the first threshold, the terminal defaults to the first rule not being effective, and the terminal still transmits the data sharing channel according to the DMRS configuration information associated with the data sharing channel, that is, the terminal still receives the PDSCH according to the DMRS configuration information associated with the PDSCH, or the terminal still sends the PUSCH according to the DMRS configuration information associated with the PUSCH.

[0111] Regarding the value of the first threshold, in some embodiments, when the DMRS configuration type associated with the data sharing channel is type 1, the first threshold can be 4 or a value greater than 4. In some embodiments, when the DMRS configuration type associated with the data sharing channel is type 2, the first threshold can be 6 or a value greater than 6.

[0112] In some embodiments, if the first rule includes: 3) the value indicated by the antenna port indication field in the first downlink control information (DCI) is a first value, wherein the first value is any one of the first value set, the first value set is used to determine that the additional DMRS does not exist, and the first value set is configured by the network-side device, then if the network-side device does not configure the first value set, the terminal defaults to the first rule not being effective, and the terminal still transmits the data sharing channel according to the DMRS configuration information associated with the data sharing channel, that is, the terminal still receives the PDSCH according to the DMRS configuration information associated with the PDSCH, or the terminal still sends the PUSCH according to the DMRS configuration information associated with the PUSCH.

[0113] In some embodiments, the first set of values ​​takes effect only if both codewords of the data sharing channel are activated simultaneously.

[0114] Regarding the values ​​contained in the first set of values, in some embodiments, the first set of values ​​when the DMRS configuration type associated with the data sharing channel is type 1 is different from the first set of values ​​when the DMRS configuration type associated with the data sharing channel is type 2.

[0115] For example, when the DMRS configuration type associated with the data sharing channel is DMRS type 1, the first set of values ​​can be {0,1,2,3}; when the DMRS configuration type associated with the data sharing channel is DMRS type 2, the first set of values ​​can be {4,5}.

[0116] Regarding the value of the second value, in some embodiments, the second value when the DMRS configuration type associated with the data sharing channel is type 1 is different from the second value when the DMRS configuration type associated with the data sharing channel is type 2.

[0117] For example, when the DMRS configuration type associated with the data sharing channel is DMRS type 1, the second value can be one of {4, 5, 6, 7}; when the DMRS configuration type associated with the data sharing channel is DMRS type 2, the second value can be one of {6, 7, 8, 9}.

[0118] In some embodiments, the second value takes effect only if both codewords of the data sharing channel are activated simultaneously.

[0119] The first rule and step 202 described above will be explained in detail below through some specific embodiments.

[0120] Example 1

[0121] The first rule includes: 1) Both codewords corresponding to the data sharing channel are activated. Accordingly, step 202 includes: if the terminal determines that both codewords corresponding to the data sharing channel are activated according to the DCI indication information, then the terminal determines that the additional DMRS associated with the data sharing channel does not exist.

[0122] As an example, for a terminal that supports the DMRS configuration information mentioned in step 201 above, assume that the network-side device configures the terminal with 8 receive antennas, and supports a maximum rank or maximum data stream number of PDSCH transmission of 8, and the DMRS parameter dmrs-Type in the RRC signaling is: DMRS type 1; dmrs-AdditionalPosition is pos1, indicating that when the number of OFDM symbols occupied by the service channel exceeds a certain value, dmrs has an additional DMRS in a time slot; maxLength is len2, indicating that the maximum number of OFDM symbols occupied by the front-end DMRS is two symbols.

[0123] Based on this, for PDSCH reception, the DMRS-related field in DCIformat1-1 is the antenna port(s) field, and the value indicated by this field corresponds to any value selected from {0,1,2,3} when both codewords are active in Table 3-1 above. Therefore:

[0124] When the DMRS associated with PDSCH is configured as DMRS type 1, if the number of data streams transmitted by PDSCH is 4, then each DMRS group only needs to occupy 1 OFDM symbol. No resources are allocated to data on the OFDM symbol occupied by the DMRS. The actual number of OFDM symbols occupied by PDSCH is 14-1-1-1=11. Assuming throughput is calculated simply using the product of the number of data streams and the number of OFDM symbols, the throughput in this case is 4 * 11 = 44. If the number of data streams transmitted by the PDSCH is greater than 4, for example, if the data stream is one of {5, 6, 7, 8}, then each DMRS group must occupy 2 OFDM symbols. The actual number of OFDM symbols occupied by the PDSCH data is 14 - 1 - 2 - 2 = 9, and the corresponding throughputs are {45, 54, 63, 72}, which are {2%, 22%, 43%, 63%} compared to the throughput when the number of data streams is 4. The theoretical throughput gain should be {5, 6, 7, 8} / 4 = {25%, 50%, 75%, 100%}. Therefore, to improve throughput performance in high-rank cases, the terminal determines that the additional DMRS associated with the PDSCH does not exist, provided that both codewords corresponding to the PDSCH are activated. At this time, within a time slot, PDSCH has only two OFDM symbols occupied by the preceding DMRS, and the actual number of OFDM symbols occupied by PDSCH data is 14-1-2=11, which ensures throughput performance.

[0125] It is easy to see that in Example 1, the first rule is that both codewords corresponding to the PDSCH transmission are indicated to be active. At this time, the number of PDSCH transmission data streams is {5,6,7,8}. As shown in Table 3-1, both codewords are configuration information in the available state. Therefore, it can be determined that the additional DMRS associated with PDSCH does not exist, so as to ensure the throughput of PDSCH.

[0126] Example 2

[0127] The first rule includes: 2) The number of data streams transmitted through the data sharing channel is greater than a first threshold. Correspondingly, step 202 includes: if the terminal determines, based on the DMRS configuration information, that the number of data streams transmitted through the data sharing channel is greater than the first threshold, that the additional DMRS associated with the data sharing channel does not exist.

[0128] In the first embodiment above, the first rule is based solely on the activation of both codewords corresponding to the data sharing channel. However, in some configurations, such as those shown in Table 3-2, if the antennaport(s) field indicates a value of 0 or 1 when both codewords are activated, the number of symbols occupied by the front-load DMRS remains 1, even though both codewords are activated. In this case, the network should be allowed some degree of freedom to decide whether to apply the first rule. Therefore, relying solely on the condition that both codewords are activated is not the only condition.

[0129] The following example illustrates this.

[0130] In the first example, when the DMRS associated with the PDSCH is configured as DMRS type 2, and the DCI indicates that both codewords are activated, if the number of data streams transmitted through the data sharing channel is greater than a first threshold, for example, the first threshold is equal to 5 in this example (of course, it can also be equal to 6 or other values), then the first rule takes effect; if the number of data streams is less than or equal to the first threshold, then the first rule does not take effect.

[0131] In the second example, we will take the transmission of PUSCH and the DMRS configuration type as DMRS type 1 as an example for illustration:

[0132] For uplink transmission, the parsing of DCI signaling parameters—antennaports—requires reference to the configuration information table under the corresponding rank. For example, if the number of transmitted data streams is 4, the table corresponding to rank 4 is consulted; if the number of transmitted data streams is 6, the table corresponding to rank 6 is consulted, and so on. To ensure throughput performance in the high-rank region, a first threshold of 4 can be set. When the number of data streams transmitted by PUSCH is greater than 4, it is determined that the additional DMRS symbol associated with the PUSCH does not exist. In this case, there are only two pre-DMRS symbols in a time slot, and the actual number of OFDM symbols occupied by PDSCH data = 14 - 1 - 2 = 11, thus ensuring throughput performance.

[0133] In the third example, we will take the transmission of PUSCH and the DMRS configuration type as DMRS type 2 as an example for illustration:

[0134] For uplink transmission, the parsing of DCI signaling parameters—antennaports—requires reference to the configuration information table under the corresponding rank. For example, if the number of transmitted data streams is 4, the table corresponding to rank 4 is consulted; if the number of transmitted data streams is 6, the table corresponding to rank 6 is consulted, and so on. To ensure throughput performance in the high-rank region, a first threshold of 6 can be set. When the number of data streams transmitted by PUSCH is greater than 6, it is determined that the additional DMRS symbol associated with the PUSCH does not exist. In this case, there are only two pre-DMRS symbols in a time slot, and the actual number of OFDM symbols occupied by PDSCH data = 14 - 1 - 2 = 11, thus ensuring throughput performance.

[0135] The fourth example illustrates the situation using PDSCH reception and DMRS configuration type 1 (DMRStype1):

[0136] For PDSCH reception under DMRS type 1, the first threshold can be equal to 4. When the DCI indicates that the number of PDSCH transmission data streams is greater than 4, that is, the number of data streams is 5, 6, 7 or 8, the terminal can determine that the additional DMRS symbol associated with the PDSCH does not exist.

[0137] It can be seen that, whether it is the reception of PDSCH or the transmission of PUSCH, if the associated DMRS configuration type is DMRS type 1, the first threshold can be equal to 4; if the DMRS configuration information associated with the data sharing channel includes DMRS configuration type 2, the first threshold can be equal to 6.

[0138] It should be noted that, in practical applications, the specific value of the first threshold can be determined by at least one of the following methods:

[0139] The agreement stipulates;

[0140] Network-side device configuration;

[0141] Terminal capabilities are specifically carried in the terminal capability reporting.

[0142] To further clarify, the determination that the number of data streams transmitted through the data sharing channel as defined in the first rule is greater than the first threshold can be based on a precondition: both codewords corresponding to the data sharing channel are activated; or it can be based on a condition other than the precondition.

[0143] Example 3

[0144] The first rule includes: 3) The value indicated by the antenna port indication field in the first downlink control information (DCI) is a first value, wherein the first value is any one of the first value set, the first value set is used to determine that the additional DMRS does not exist, and the first DCI is the DCI that schedules the data sharing channel. Accordingly, step 202 includes: when the terminal determines that the value indicated by the antenna port indication field in the first downlink control information (DCI) is the first value, it determines that the additional DMRS associated with the data sharing channel does not exist.

[0145] Rule 3) achieves the same effect as rule 2) above, the only difference being the way it is presented. Rule 3) is based on a set of values, which corresponds to the values ​​indicated by the DCIformat field 'antennaport'.

[0146] Taking PDSCH reception as an example, where the DMRS configuration type associated with PDSCH is DMRStype1:

[0147] The first set of values ​​can be {0,1,2,3}. When the value indicated by the DCIformat1-1 indicator field 'antennaport' is any one of the values ​​in the first set of values, the terminal determines that the additional DMRS symbol associated with the PDSCH does not exist.

[0148] Taking PDSCH reception as an example, and the DMRS configuration type associated with PDSCH being DMRStype2:

[0149] The first set of values ​​can be {4,5}. When the value indicated by the DCIformat1-1 indicator field 'antennaport' is any one of the values ​​in the first set of values ​​{4,5}, the terminal determines that the additional DMRS symbol associated with the PDSCH does not exist.

[0150] It should be noted that, in practical applications, the specific values ​​of the first set of values ​​can be determined by at least one of the following methods:

[0151] The agreement stipulates;

[0152] Network-side device configuration;

[0153] Terminal capabilities are specifically carried in the terminal capability reporting.

[0154] To further explain, the determination that the value indicated by the antenna port indication field in the first DCI as defined in the first rule is the first value can be based on a premise: both codewords corresponding to the data sharing channel are activated; or it can be based on a condition other than the premise.

[0155] In some embodiments, if the first rule includes: 3) the value indicated by the antenna port indication field in the first downlink control information (DCI) is a first value, wherein the first value is any one of the first value set, the first value set is used to determine that the additional DMRS does not exist, and the first value set is configured by the network-side device, then if the network-side device does not configure the first value set, the terminal defaults to the first rule not being effective, and the terminal still transmits the data sharing channel according to the DMRS configuration information associated with the data sharing channel, that is, the terminal still receives the PDSCH according to the DMRS configuration information associated with the PDSCH, or the terminal still sends the PUSCH according to the DMRS configuration information associated with the PUSCH.

[0156] Example 4

[0157] The first rule includes: 4) The value indicated by the antenna port indication field in the first DCI is a second value, and the second value is used to determine that the additional DMRS does not exist, wherein the first DCI is the DCI that schedules the data sharing channel. Accordingly, step 202 includes: when the terminal determines that the value indicated by the antenna port indication field in the first DCI is the second value, it determines that the additional DMRS associated with the data sharing channel does not exist.

[0158] In some embodiments, since the current DCI format indication field 'antennaport' design table of NRRel15 has reserved entries that are not fully utilized, it is advisable to allocate some entries specifically to indicate the absence of additional DMRS symbols associated with the data sharing channel. The advantage of this is that the network can flexibly indicate to the terminal via DCI whether the additional DMRS symbols are present or absent under the same DMRS configuration and DMRS indication.

[0159] The following example illustrates this.

[0160] The first example uses PDSCH reception, where the DMRS configuration type associated with the PDSCH is DMRStype1:

[0161] In related technologies, it is assumed that the higher-layer signaling configuration dmrs-AdditionalPosition is 'pos1', and the DMRS-related parameters of the PDSCH of DMRS type 1 indicated by DCIformat1-1 are as shown in Table 3-1 above. In this application embodiment, compared to related technologies, some entries are added to Table 3-1 to introduce the aforementioned second value. The specific added entries are shown in Table 4 below. In Table 4, the bolded and underlined entries are newly added entries, and to reduce length, most rows identical to those in Table 3-1 have been omitted (omitted rows can be found in Table 3-1).

[0162] Table 4 Antenna Ports (1000+DMRS Ports), DMRS Configuration Type = 1, Maximum Length = 2 (Antennaport(s)(1000+DMRSport), dmrs-Type = 1, maxLength = 2)

[0163] According to Table 4, when both codewords corresponding to PDSCH are activated:

[0164] If the value indicated by the DCIformat1-1 indication field 'antennaport' is any one of the values ​​in {4,5,6,7}, the terminal determines that the additional DMRS symbol associated with the PDSCH does not exist.

[0165] If the value indicated by the DCIformat1-1 indication field 'antennaport' is any one of the values ​​in {0,1,2,3}, the terminal determines that the additional DMRS symbol associated with the PDSCH exists.

[0166] The second example is the reception of PDSCH, where the DMRS configuration type associated with PDSCH is DMRStype2:

[0167] In related technologies, it is assumed that the higher-layer signaling configuration dmrs-AdditionalPosition is 'pos1', and the DMRS-related parameters of the PDSCH of DMRS type 2 indicated by DCIformat1-1 are as shown in Table 3-2 above. In this application embodiment, compared to related technologies, some entries are added to Table 3-2 to introduce the aforementioned second value. The specific added entries are shown in Table 5 below. In Table 5, the bolded and underlined entries are the newly added entries. Furthermore, to reduce length, most rows in Table 5 that are identical to those in Table 3-2 have been omitted (omitted rows can be found in Table 3-2).

[0168] Table 5 Antenna Ports (1000+DMRS Ports), DMRS Configuration Type = 2, Maximum Length = 2 (Antennaport(s)(1000+DMRSport), dmrs-Type = 2, maxLength = 2)

[0169] According to Table 5, when both codewords corresponding to PDSCH are activated:

[0170] If the value indicated by the DCIformat1-1 indication field 'antennaport' is any one of {6,7,8,9}, the terminal determines that the additional DMRS symbol associated with the PDSCH does not exist.

[0171] If the value indicated by the DCIformat1-1 indication field 'antennaport' is any one of the values ​​in {0,1,2,3,4,5}, the terminal determines that the additional DMRS symbol associated with the PDSCH exists.

[0172] It should be noted that, in addition to the second numerical representation of the information enhancement entries in Tables 4 and 5, there is another possible implementation:

[0173] The third example is the reception of PDSCH, where the DMRS configuration type associated with PDSCH is DMRStype2:

[0174] In related technologies, it is assumed that the higher-layer signaling configuration dmrs-AdditionalPosition is 'pos1', and the DMRS-related parameters of the PDSCH of DMRS type 2 indicated by DCIformat1-1 are as shown in Table 3-2 above. In this application embodiment, compared to related technologies, some entries are added to Table 3-2 to introduce the aforementioned second value. The specific added entries are shown in Table 6 below. In Table 5, the bolded and underlined entries are the newly added entries. Furthermore, to reduce length, most rows in Table 6 that are identical to those in Table 3-2 have been omitted (omitted rows can be found in Table 3-2).

[0175] Table 6 Antenna Ports (1000+DMRS Ports), DMRS Configuration Type = 2, Maximum Length = 2 (Antennaport(s)(1000+DMRSport), dmrs-Type = 2, maxLength = 2)

[0176] It should be noted that, by comparing Table 6 and Table 5, the difference between the third example and the second example is that the newly added entry used to introduce the second value is different.

[0177] The fourth example is the transmission of PUSCH, where the DMRS configuration type associated with PUSCH is DMRStype1:

[0178] Compared with related technologies, the embodiments of this application add some entries to introduce the above-mentioned second value. The specific added entries are shown in any of the tables 7, 8, 9 and 10 below. In tables 7, 8, 9 and 10, the entries marked in bold and underlined are the newly added entries.

[0179] Table 7 Antenna Port, CP-OFDM Waveform, dmrs-Type=1, dmrs-TypeEnh Not Configured, DMRS Configuration Type=1, Maximum Length=2, Rank=5

[0180] (Antennaport(s),transformprecoderisdisabled,dmrs-Type=1,mrs-TypeEnhisnotconfigured,maxLength=2,rank=5)

[0181] Table 8 Antenna Port, CP-OFDM Waveform, dmrs-Type=1, dmrs-TypeEnh Not Configured, DMRS Configuration Type=1, Maximum Length=2, Rank=6

[0182] Table 9 Antenna Port, CP-OFDM Waveform, dmrs-Type=1, dmrs-TypeEnh Not Configured, DMRS Configuration Type=1, Maximum Length=2, Rank=7

[0183] Table 10 Antenna Port, CP-OFDM Waveform, dmrs-Type=1, dmrs-TypeEnh Not Configured, DMRS Configuration Type=1, Maximum Length=2, Rank=8

[0184] According to any one of Tables 7, 8, 9 and 10, when DCIformat0-1 indicates that the Rank corresponding to the PUSCH is 5, 6, 7 or 8, and the value indicated by the field 'antennaport' is {1}, the terminal determines that the additional DMRS symbol associated with the PUSCH channel does not exist.

[0185] For the transmission of PUSCH, and the DMRS configuration type associated with PUSCH is DMRStype2, the situation is similar to the fourth example above, and will not be repeated here.

[0186] It should be noted that:

[0187] The additional entries in the different examples above are only for understanding some of the ways of presentation given by the scheme. However, the actual presentation may vary in the number of additional entries or the textual descriptions in the table. As long as the technical concept of this application is used, it is within the scope of protection.

[0188] Example 5

[0189] The first rule includes: 5) The TDRA indicated by the Time Domain Resource Allocation (TDRA) indication field in the first DCI is the first TDRA, wherein the first TDRA is a TDRA in the TDRA list configured to indicate that the additional DMRS does not exist. Accordingly, step 202 includes: if the TDRA indicated by the Time Domain Resource Allocation (TDRA) indication field in the first DCI is the first TDRA, the terminal determines that the additional DMRS associated with the data sharing channel does not exist.

[0190] In some embodiments, the network-side device pre-configures a TDRA list for the terminal and then indicates the TDRA by indicating the index in the TDRA list. In this embodiment, some TDRAs in the TDRA list are configured as TDRAs indicating that the DMRS does not exist (first TDRA). When the TDRA indicated by the first DCI is the first TDRA, it can be considered that the additional DMRS associated with the data sharing channel scheduled by the first DCI does not exist.

[0191] The TDRA indication field indicates the time-domain relationship between the first DCI and the scheduled PDSCH or PUSCH, as well as the number of OFDM symbols occupied by the scheduled PDSCH or PUSCH. Taking PDSCH transmission as an example, the network higher-layer signaling PDSCH-TimeDomainResourceAllocationList includes various TDRA configurations, some of which include a parameter indicating that additional DMRS symbols do not exist. When the first DCI is dynamically scheduled, it can dynamically indicate that one of the TDRA configurations is effective. If the currently indicated TDRA configuration includes a parameter indicating that additional DMRS symbols do not exist, the terminal determines that the additional DMRS associated with the PDSCH or PUSCH does not exist.

[0192] Example 6

[0193] The first rule includes: 6) the index of the modulation and coding scheme (MCS) corresponding to the data sharing channel is greater than the second threshold. Accordingly, step 202 includes: if the terminal determines that the index of the MCS corresponding to the data sharing channel is greater than the second threshold, it determines that the additional DMRS associated with the data sharing channel does not exist.

[0194] For example, considering scenarios where high-rank operations prioritize high throughput, in addition to considering the impact of the number of transmitted data streams, the influence of MCS level can also be taken into account, where different MCS levels correspond to different indices. One implementation scheme is that if the index of the MCS corresponding to PDSCH is greater than a second threshold, the terminal determines that the additional DMRS symbol associated with PDSCH does not exist; or, if the index of the MCS corresponding to PUSCH is greater than the second threshold, the terminal determines that the additional DMRS symbol associated with PUSCH does not exist.

[0195] Another implementation scheme is as follows: when the MCS corresponding to the PDSCH is greater than the second threshold, and at least one of the above embodiments one, two, three, or four is also satisfied, the terminal determines that the additional DMRS symbol associated with the PDSCH does not exist; or, when the MCS corresponding to the PUSCH is greater than the second threshold, and the number of data streams transmitted by the PPUSCH is greater than the first threshold, the terminal determines that the additional DMRS symbol associated with the PUSCH does not exist.

[0196] The second threshold may be determined by at least one of the following methods:

[0197] The agreement stipulates;

[0198] Network-side device configuration;

[0199] Terminal capabilities are specifically carried in the terminal capability reporting.

[0200] It should be noted that the index of the corresponding modulation and coding scheme (MCS) of the data sharing channel is greater than the second threshold, wherein the index of the MCS does not include cases used to indicate retransmission of the data sharing channel.

[0201] Example 7

[0202] The first rule includes: 7) The DCI that schedules the data sharing channel contains a status indication field, and the status indication field indicates a second state, wherein the status indication field is used to indicate one of a first state and a second state, the first state being different from the second state, and the second state being used to indicate that the terminal determines that the additional DMRS associated with the data sharing channel does not exist. Accordingly, step 202 includes: if the terminal determines that the DCI that schedules the data sharing channel contains a status indication field, and the status indication field indicates a second state, then the terminal determines that the additional DMRS associated with the data sharing channel does not exist.

[0203] For example, a new 1-bit state indication field is introduced in the first DCI to indicate two states: state 1 (i.e., the first state) or state 2 (i.e., the second state). State 1 indicates that the terminal transmits the data sharing channel according to the current DMRS configuration; state 2 indicates that the terminal determines that the additional DMRS associated with the data sharing channel does not exist.

[0204] In some embodiments, in addition to satisfying rule 7), the terminal may further determine that the additional DMRS associated with the data sharing channel does not exist if at least one of rule 1), rule 2), rule 3), rule 4), rule 5), and rule 6) is satisfied.

[0205] Example 8

[0206] The first rule includes: 8) The terminal is instructed by the network-side device to have multiple DMRS configurations, including a first DMRS configuration, where no additional DMRS exists in the first DMRS configuration, and the terminal receives an indication to switch to the first DMRS. Correspondingly, step 202 includes: when the terminal is instructed by the network-side device to have multiple DMRS configurations, including a first DMRS configuration, where no additional DMRS exists in the first DMRS configuration, and the terminal receives an indication to switch to the first DMRS, the terminal determines that the additional DMRS associated with the data sharing channel does not exist.

[0207] For example, multiple DMRS-DownlinkConfigs could be introduced into the current PDSCH-Config, and then switched via DCI signaling. Specifically, this can be achieved through the following two methods:

[0208] a. Introduce dmrs-DownlinkForPDSCH-MappingTypeAlist or dmrs-DownlinkForPDSCH-MappingTypeBlist, corresponding to the presence or absence of the additionalDMRS symbol, respectively;

[0209] b.dmrs-DownlinkForPDSCH-MappingTypeA or dmrs-DownlinkForPDSCH-MappingTypeB correspond to multiple DMRS-DownlinkConfigs, which respectively correspond to the presence or absence of the additional DMRS symbol.

[0210] Similarly, it is also possible to introduce multiple DMRS-UplinkConfig sets into the current PUSCH-Config and then switch them via DCI signaling.

[0211] Example 9

[0212] The first rule includes: 9) The RRC signaling received by the terminal contains a first parameter. Accordingly, step 202 includes: when the received RRC signaling contains the first parameter, the terminal determines to perform a judgment operation of at least one rule defined in the first rule.

[0213] In some embodiments, if the first rule includes: 9) the RRC signaling received by the terminal contains a first parameter, then if the network-side device does not configure the first parameter, the terminal assumes that the first rule is not effective, and the terminal still transmits the data sharing channel according to the DMRS configuration information associated with the data sharing channel, that is, the terminal still receives the PDSCH according to the DMRS configuration information associated with the PDSCH, or the terminal still sends the PUSCH according to the DMRS configuration information associated with the PUSCH.

[0214] In some embodiments, the terminal, based on satisfying rule 9), further determines that if at least one of rule 1), rule 2), rule 3), rule 4), rule 5), and rule 6) is satisfied, the additional DMRS associated with the data sharing channel does not exist.

[0215] The above describes some possible embodiments included in this application. In practical applications, other embodiments can be extended and are not limited to the above embodiments.

[0216] The present application proposes a data sharing channel transmission method in which the terminal can determine that the additional DMRS associated with the data sharing channel does not exist when a first rule is met, and use the resources occupied by the additional DMRS as resources to carry at least part of the data sharing channel. This increases the resources used to transmit the data sharing channel, thereby improving spectral efficiency. In high-rank transmission scenarios, it can ensure that the throughput gain is not lost, or reduce the loss of throughput gain.

[0217] As shown in Figure 4, another embodiment of this application proposes a data sharing channel transmission method, which may include:

[0218] Step 401: The network-side device sends the Demodulation Reference Signal (DMRS) configuration information associated with the Data Sharing Channel to the terminal.

[0219] The data sharing channel may include, but is not limited to, at least one of the Physical Downlink Shared Channel (PDSCH) and the Physical Uplink Shared Channel (PUSCH).

[0220] DMRS configuration information is generally indicated by network-side devices through a combination of higher-layer Radio Resource Control (RRC) signaling and downlink control information (DCI).

[0221] The main parameters in the DMRS configuration information may be indicated by RRC signaling, and the main parameters in the DMRS configuration information may include, but are not limited to, at least one of the following:

[0222] DMRS configuration type, wherein the DMRS configuration type includes type 1 or type 2;

[0223] Additional DMRS configuration information;

[0224] Maximum length of the front DMRS.

[0225] Both DMRS type 1 and DMRS type 2 support single-symbol DM-RS and double-symbol DM-RS structures.

[0226] For example, in RRC signaling, the main parameters in the DMRS configuration information are configured through IEDMRS-DownlinkConfig, as follows:

[0227] DMRS-DownlinkConfig::=SEQUENCE{

[0228] dmrs-Type: Indicates whether the DMRS configuration type is DMRS type 1 or DMRS type 2.

[0229] dmrs-AdditionalPosition: Indicates that there is an additional DMRS configuration in the time dimension within time slot t.

[0230] maxLength: Indicates the maximum number of OFDM symbols that the preceding DMRS can occupy, with a value of 1 or 2.

[0231] }

[0232] For specific DMRS configuration information, please refer to Tables 1-1, 1-2, 2-1, 2-2, 3-1, and 3-2 above. They will not be repeated here.

[0233] Step 402: If the network-side device determines that the additional DMRS associated with the data sharing channel does not exist, the network-side device determines that the first rule is satisfied.

[0234] The first rule is used to determine whether the data sharing channel meets at least one of the following conditions:

[0235] The rank of the data sharing channel is in the high-rank interval or the number of data streams transmitted by the data sharing channel is greater than a preset threshold. For example, when the DMRS configuration type of the data sharing channel is DMRS type 1, the rank or the number of data streams transmitted by the data sharing channel is greater than or equal to 4. When the DMRS configuration type of the data sharing channel is DMRS type 2, the rank of the data sharing channel is greater than or equal to 6.

[0236] The DMRS associated with the data sharing channel is a two-symbol DMRS.

[0237] This is because, under the above conditions, the data sharing channel suffers from low spectral efficiency and unsatisfactory throughput gain.

[0238] For example, the first rule may include, but is not limited to, at least one of the following:

[0239] 1) Both codewords corresponding to the data sharing channel are activated;

[0240] 2) The number of data streams transmitted through the data sharing channel is greater than the first threshold;

[0241] 3) The value indicated by the antenna port indication field in the first downlink control information (DCI) is a first value, wherein the first value is any one of the first value set, and the first value set is used to determine that the additional DMRS does not exist;

[0242] 4) The value indicated by the antenna port indication field in the first DCI is the second value, which is used to determine that the additional DMRS does not exist;

[0243] 5) The Time Domain Resource Allocation (TDRA) indication field in the first DCI indicates the first TDRA, wherein the first TDRA is a TDRA in the TDRA list configured to indicate that the additional DMRS does not exist;

[0244] 6) The index of the modulation and coding scheme (MCS) corresponding to the data sharing channel is greater than the second threshold;

[0245] 7) The DCI that schedules the data sharing channel includes a status indication field, and the status indication field indicates a second status. The status indication field is used to indicate one of a first status and a second status. The first status is different from the second status. The second status is used to indicate that the terminal determines that the additional DMRS associated with the data sharing channel does not exist.

[0246] 8) The terminal is instructed by the network-side device to have multiple DMRS configurations, including a first DMRS configuration, in which there is no additional DMRS, and the terminal receives an instruction to switch to the first DMRS;

[0247] 9) The Radio Resource Control (RRC) signaling received by the terminal contains the first parameter.

[0248] Wherein, the first DCI is the DCI that schedules the data sharing channel.

[0249] Wherein, at least one of the first threshold, the first set of values, the second value, and the second threshold can be determined by at least one of the following methods:

[0250] The agreement stipulates;

[0251] Network-side device configuration;

[0252] Terminal capabilities are specifically carried in the terminal capability reporting.

[0253] It should be noted that, in this application, the terminal determining that the additional DMRS associated with the data sharing channel does not exist indicates at least one of the following:

[0254] The DMRS associated with the data sharing channel only includes the front-end DMRS;

[0255] The location configuration information of the DMRS associated with the data sharing channel is temporarily modified to the first location information, wherein the first location information does not include the location information of the additional DMRS, such as "pos0" in Table 2-1.

[0256] In some embodiments, if the first rule includes: 2) the number of data streams transmitted through the data sharing channel is greater than a first threshold, and the first threshold is set by the network-side device, then if the network-side device does not configure the first threshold, the terminal defaults to the first rule not being effective, and the terminal still transmits the data sharing channel according to the DMRS configuration information associated with the data sharing channel, that is, the terminal still receives the PDSCH according to the DMRS configuration information associated with the PDSCH, or the terminal still sends the PUSCH according to the DMRS configuration information associated with the PUSCH.

[0257] Regarding the value of the first threshold, in some embodiments, when the DMRS configuration type associated with the data sharing channel is type 1, the first threshold can be 4 or a value greater than 4. In some embodiments, when the DMRS configuration type associated with the data sharing channel is type 2, the first threshold can be 6 or a value greater than 6.

[0258] In some embodiments, if the first rule includes: 3) the value indicated by the antenna port indication field in the first downlink control information (DCI) is a first value, wherein the first value is any one of the first value set, the first value set is used to determine that the additional DMRS does not exist, and the first value set is configured by the network-side device, then if the network-side device does not configure the first value set, the terminal defaults to the first rule not being effective, and the terminal still transmits the data sharing channel according to the DMRS configuration information associated with the data sharing channel, that is, the terminal still receives the PDSCH according to the DMRS configuration information associated with the PDSCH, or the terminal still sends the PUSCH according to the DMRS configuration information associated with the PUSCH.

[0259] In some embodiments, the first set of values ​​takes effect only if both codewords of the data sharing channel are activated simultaneously.

[0260] Regarding the values ​​contained in the first set of values, in some embodiments, the first set of values ​​when the DMRS configuration type associated with the data sharing channel is type 1 is different from the first set of values ​​when the DMRS configuration type associated with the data sharing channel is type 2.

[0261] For example, when the DMRS configuration type associated with the data sharing channel is DMRS type 1, the first set of values ​​can be {0,1,2,3}; when the DMRS configuration type associated with the data sharing channel is DMRS type 2, the first set of values ​​can be {4,5}.

[0262] Regarding the value of the second value, in some embodiments, the second value when the DMRS configuration type associated with the data sharing channel is type 1 is different from the second value when the DMRS configuration type associated with the data sharing channel is type 2.

[0263] In some embodiments, the second value takes effect only if both codewords of the data sharing channel are activated simultaneously.

[0264] For example, when the DMRS configuration type associated with the data sharing channel is DMRS type 1, the second value can be one of {4, 5, 6, 7}; when the DMRS configuration type associated with the data sharing channel is DMRS type 2, the second value can be one of {6, 7, 8, 9}.

[0265] For more specific embodiments of step 402, please refer to Embodiments 1 to 9 described above, which will not be repeated here.

[0266] Step 403: The network-side device uses the resources corresponding to the additional DMRS as resources to carry at least a portion of the data sharing channel.

[0267] The resources corresponding to the additional DMRS are the resources configured or indicated by the network-side device for the additional DMRS.

[0268] The present application proposes a data sharing channel transmission method in which the network-side device can determine that the additional DMRS associated with the data sharing channel does not exist when a first rule is met, and use the resources occupied by the additional DMRS as resources to carry at least part of the data sharing channel. This increases the resources used to transmit the data sharing channel, thereby improving spectral efficiency. In high-rank transmission scenarios, it can ensure that the throughput gain is not lost, or reduce the loss of throughput gain.

[0269] The data sharing channel transmission method provided in this application can be executed by a virtual device. This application uses a virtual device executing the data sharing channel transmission method as an example to illustrate the data sharing channel transmission apparatus provided in this application.

[0270] As shown in Figure 5, an embodiment of this application proposes a data sharing channel transmission device 500, which can be applied to a terminal. The device 500 may include an information receiving module 501.

[0271] The information receiving module 501 is used to receive the configuration information of the demodulation reference signal (DMRS) associated with the data sharing channel.

[0272] The data sharing channel may include, but is not limited to, at least one of the Physical Downlink Shared Channel (PDSCH) and the Physical Uplink Shared Channel (PUSCH).

[0273] DMRS configuration information is generally indicated by network-side devices through a combination of higher-layer Radio Resource Control (RRC) signaling and downlink control information (DCI).

[0274] The main parameters in the DMRS configuration information may be indicated by RRC signaling, and the main parameters in the DMRS configuration information may include, but are not limited to, at least one of the following:

[0275] DMRS configuration type, wherein the DMRS configuration type includes type 1 or type 2;

[0276] Additional DMRS configuration information;

[0277] Maximum length of the front DMRS.

[0278] Both DMRS type 1 and DMRS type 2 support single-symbol DM-RS and double-symbol DM-RS structures.

[0279] For example, in RRC signaling, the main parameters in the DMRS configuration information are configured through IEDMRS-DownlinkConfig, as follows:

[0280] DMRS-DownlinkConfig::=SEQUENCE{

[0281] dmrs-Type: Indicates whether the DMRS configuration type is DMRS type 1 or DMRS type 2.

[0282] dmrs-AdditionalPosition: Indicates that there is an additional DMRS configuration in the time dimension within the time slot of the dmrs.

[0283] maxLength: Indicates the maximum number of OFDM symbols that the preceding DMRS can occupy, with a value of 1 or 2.

[0284] }

[0285] For specific DMRS configuration information, please refer to Tables 1-1, 1-2, 2-1, 2-2, 3-1, and 3-2 above. They will not be repeated here.

[0286] As shown in Figure 6, the data sharing channel transmission device 500 proposed in this application embodiment may further include: a processing module 502 and a channel transmission module 503.

[0287] Processing module 502 is used to determine that the additional DMRS associated with the data sharing channel does not exist if the first rule is satisfied.

[0288] The channel transmission module 503 is used to use the resources corresponding to the additional DMRS as resources to carry at least a portion of the data sharing channel.

[0289] As mentioned above, the data sharing channel may include, but is not limited to, at least one of PDSCH and PUSCH. That is, when the terminal receives PDSCH or sends PUSCH, under the condition of satisfying a set rule - the first rule, it determines that the additional DMRS associated with PDSCH or PUSCH does not exist, that is, there is no additional DMRS, and the OFDM symbols originally designed to carry DMRS are used to carry the data channel (or service channel).

[0290] The resources corresponding to the additional DMRS are the resources configured or indicated by the network-side device for the additional DMRS.

[0291] The first rule is used to determine whether the data sharing channel meets at least one of the following conditions:

[0292] The rank of the data sharing channel is in the high-rank interval or the number of data streams transmitted by the data sharing channel is greater than a preset threshold. For example, when the DMRS configuration type of the data sharing channel is DMRS type 1, the rank or the number of data streams transmitted by the data sharing channel is greater than or equal to 4. When the DMRS configuration type of the data sharing channel is DMRS type 2, the rank of the data sharing channel is greater than or equal to 6.

[0293] The DMRS associated with the data sharing channel is a two-symbol DMRS.

[0294] This is because, under the above conditions, the data sharing channel suffers from low spectral efficiency and unsatisfactory throughput gain.

[0295] For example, the first rule may include, but is not limited to, at least one of the following:

[0296] 1) Both codewords corresponding to the data sharing channel are activated;

[0297] 2) The number of data streams transmitted through the data sharing channel is greater than the first threshold;

[0298] 3) The value indicated by the antenna port indication field in the first downlink control information (DCI) is a first value, wherein the first value is any one of the first value set, and the first value set is used to determine that the additional DMRS does not exist;

[0299] 4) The value indicated by the antenna port indication field in the first DCI is the second value, which is used to determine that the additional DMRS does not exist;

[0300] 5) The Time Domain Resource Allocation (TDRA) indication field in the first DCI indicates the first TDRA, wherein the first TDRA is a TDRA in the TDRA list configured to indicate that the additional DMRS does not exist;

[0301] 6) The index of the modulation and coding scheme (MCS) corresponding to the data sharing channel is greater than the second threshold;

[0302] 7) The DCI that schedules the data sharing channel includes a status indication field, and the status indication field indicates a second status. The status indication field is used to indicate one of a first status and a second status. The first status is different from the second status. The second status is used to indicate that the terminal determines that the additional DMRS associated with the data sharing channel does not exist.

[0303] 8) The terminal is instructed by the network-side device to have multiple DMRS configurations, including a first DMRS configuration, in which there is no additional DMRS, and the terminal receives an instruction to switch to the first DMRS;

[0304] 9) The Radio Resource Control (RRC) signaling received by the terminal contains the first parameter.

[0305] Wherein, the first DCI is the DCI that schedules the data sharing channel.

[0306] Wherein, at least one of the first threshold, the first set of values, the second value, and the second threshold can be determined by at least one of the following methods:

[0307] The agreement stipulates;

[0308] Network-side device configuration;

[0309] Terminal capabilities are specifically carried in the terminal capability reporting.

[0310] It should be noted that, in this application, the terminal determining that the additional DMRS associated with the data sharing channel does not exist indicates at least one of the following:

[0311] The DMRS associated with the data sharing channel only includes the front-end DMRS;

[0312] The location configuration information of the DMRS associated with the data sharing channel is temporarily modified to the first location information, wherein the first location information does not include the location information of the additional DMRS, such as "pos0" in Table 2-1.

[0313] In some embodiments, if the first rule includes: 2) the number of data streams transmitted on the data sharing channel is greater than a first threshold, and the first threshold is set by the network-side device, then if the network-side device does not configure the first threshold, the terminal defaults to the first rule not being effective, and the terminal still transmits the data sharing channel according to the DMRS configuration information associated with the data sharing channel, that is, the terminal still receives the PDSCH according to the DMRS configuration information associated with the PDSCH, or the terminal still sends the PUSCH according to the DMRS configuration information associated with the PUSCH.

[0314] Regarding the value of the first threshold, in some embodiments, when the DMRS configuration type associated with the data sharing channel is type 1, the first threshold can be 4 or a value greater than 4. In some embodiments, when the DMRS configuration type associated with the data sharing channel is type 2, the first threshold can be 6 or a value greater than 6.

[0315] In some embodiments, if the first rule includes: 3) the value indicated by the antenna port indication field in the first downlink control information (DCI) is a first value, wherein the first value is any one of the first value set, the first value set is used to determine that the additional DMRS does not exist, and the first value set is configured by the network-side device, then if the network-side device does not configure the first value set, the terminal defaults to the first rule not being effective, and the terminal still transmits the data sharing channel according to the DMRS configuration information associated with the data sharing channel, that is, the terminal still receives the PDSCH according to the DMRS configuration information associated with the PDSCH, or the terminal still sends the PUSCH according to the DMRS configuration information associated with the PUSCH.

[0316] In some embodiments, the first set of values ​​takes effect only if both codewords of the data sharing channel are activated simultaneously.

[0317] Regarding the values ​​contained in the first set of values, in some embodiments, the first set of values ​​when the DMRS configuration type associated with the data sharing channel is type 1 is different from the first set of values ​​when the DMRS configuration type associated with the data sharing channel is type 2.

[0318] For example, when the DMRS configuration type associated with the data sharing channel is DMRS type 1, the first set of values ​​can be {0,1,2,3}; when the DMRS configuration type associated with the data sharing channel is DMRS type 2, the first set of values ​​can be {4,5}.

[0319] Regarding the value of the second value, in some embodiments, the second value when the DMRS configuration type associated with the data sharing channel is type 1 is different from the second value when the DMRS configuration type associated with the data sharing channel is type 2.

[0320] For example, when the DMRS configuration type associated with the data sharing channel is DMRS type 1, the second value can be one of {4, 5, 6, 7}; when the DMRS configuration type associated with the data sharing channel is DMRS type 2, the second value can be one of {6, 7, 8, 9}.

[0321] In some embodiments, the second value takes effect only if both codewords of the data sharing channel are activated simultaneously.

[0322] The data sharing channel transmission apparatus 500 proposed in this application embodiment can determine that the additional DMRS associated with the data sharing channel does not exist when a first rule is met, and use the resources occupied by the additional DMRS as resources to carry at least part of the data sharing channel. This increases the resources used to transmit the data sharing channel, thereby improving spectral efficiency. In high-rank transmission scenarios, it can ensure that the throughput gain is not lost, or reduce the loss of throughput gain.

[0323] As shown in Figure 7, another embodiment of this application proposes a data sharing channel transmission device 700, which can be applied to network-side equipment. The device 700 may include: an information configuration module 701, a processing module 702, and a channel transmission module 703.

[0324] The information configuration module 701 is used to send the demodulation reference signal (DMRS) configuration information associated with the data sharing channel to the terminal.

[0325] The data sharing channel may include, but is not limited to, at least one of the Physical Downlink Shared Channel (PDSCH) and the Physical Uplink Shared Channel (PUSCH).

[0326] DMRS configuration information is generally indicated by network-side devices through a combination of higher-layer Radio Resource Control (RRC) signaling and downlink control information (DCI).

[0327] The main parameters in the DMRS configuration information may be indicated by RRC signaling, and the main parameters in the DMRS configuration information may include, but are not limited to, at least one of the following:

[0328] DMRS configuration type, wherein the DMRS configuration type includes type 1 or type 2;

[0329] Additional DMRS configuration information;

[0330] Maximum length of the front DMRS.

[0331] Both DMRS type 1 and DMRS type 2 support single-symbol DM-RS and double-symbol DM-RS structures.

[0332] For example, in RRC signaling, the main parameters in the DMRS configuration information are configured through IEDMRS-DownlinkConfig, as follows:

[0333] DMRS-DownlinkConfig::=SEQUENCE{

[0334] dmrs-Type: Indicates whether the DMRS configuration type is DMRS type 1 or DMRS type 2.

[0335] dmrs-AdditionalPosition: Indicates that there is an additional DMRS configuration in the time dimension within time slot t.

[0336] maxLength: Indicates the maximum number of OFDM symbols that the preceding DMRS can occupy, with a value of 1 or 2.

[0337] }

[0338] For specific DMRS configuration information, please refer to Tables 1-1, 1-2, 2-1, 2-2, 3-1, and 3-2 above. They will not be repeated here.

[0339] Processing module 702 is used to determine that the additional DMRS associated with the data sharing channel does not exist if the first rule is satisfied.

[0340] The first rule is used to determine whether the data sharing channel meets at least one of the following conditions:

[0341] The rank of the data sharing channel is in the high-rank interval or the number of data streams transmitted by the data sharing channel is greater than a preset threshold. For example, when the DMRS configuration type of the data sharing channel is DMRS type 1, the rank or the number of data streams transmitted by the data sharing channel is greater than or equal to 4. When the DMRS configuration type of the data sharing channel is DMRS type 2, the rank of the data sharing channel is greater than or equal to 6.

[0342] The DMRS associated with the data sharing channel is a two-symbol DMRS.

[0343] This is because, under the above conditions, the data sharing channel suffers from low spectral efficiency and unsatisfactory throughput gain.

[0344] For example, the first rule may include, but is not limited to, at least one of the following:

[0345] 1) Both codewords corresponding to the data sharing channel are activated;

[0346] 2) The number of data streams transmitted through the data sharing channel is greater than the first threshold;

[0347] 3) The value indicated by the antenna port indication field in the first downlink control information (DCI) is a first value, wherein the first value is any one of the first value set, and the first value set is used to determine that the additional DMRS does not exist;

[0348] 4) The value indicated by the antenna port indication field in the first DCI is the second value, which is used to determine that the additional DMRS does not exist;

[0349] 5) The Time Domain Resource Allocation (TDRA) indication field in the first DCI indicates the first TDRA, wherein the first TDRA is a TDRA in the TDRA list configured to indicate that the additional DMRS does not exist;

[0350] 6) The index of the modulation and coding scheme (MCS) corresponding to the data sharing channel is greater than the second threshold;

[0351] 7) The DCI that schedules the data sharing channel includes a status indication field, and the status indication field indicates a second status. The status indication field is used to indicate one of a first status and a second status. The first status is different from the second status. The second status is used to indicate that the terminal determines that the additional DMRS associated with the data sharing channel does not exist.

[0352] 8) The terminal is instructed by the network-side device to have multiple DMRS configurations, including a first DMRS configuration, in which there is no additional DMRS, and the terminal receives an instruction to switch to the first DMRS;

[0353] 9) The Radio Resource Control (RRC) signaling received by the terminal contains the first parameter.

[0354] Wherein, the first DCI is the DCI that schedules the data sharing channel.

[0355] Wherein, at least one of the first threshold, the first set of values, the second value, and the second threshold can be determined by at least one of the following methods:

[0356] The agreement stipulates;

[0357] Network-side device configuration;

[0358] Terminal capabilities are specifically carried in the terminal capability reporting.

[0359] It should be noted that, in this application, the terminal determining that the additional DMRS associated with the data sharing channel does not exist indicates at least one of the following:

[0360] The DMRS associated with the data sharing channel only includes the front-end DMRS;

[0361] The location configuration information of the DMRS associated with the data sharing channel is temporarily modified to the first location information, wherein the first location information does not include the location information of the additional DMRS, such as "pos0" in Table 2-1.

[0362] In some embodiments, if the first rule includes: 2) the number of data streams transmitted through the data sharing channel is greater than a first threshold, and the first threshold is set by the network-side device, then if the network-side device does not configure the first threshold, the terminal defaults to the first rule not being effective, and the terminal still transmits the data sharing channel according to the DMRS configuration information associated with the data sharing channel, that is, the terminal still receives the PDSCH according to the DMRS configuration information associated with the PDSCH, or the terminal still sends the PUSCH according to the DMRS configuration information associated with the PUSCH.

[0363] Regarding the value of the first threshold, in some embodiments, when the DMRS configuration type associated with the data sharing channel is type 1, the first threshold can be 4 or a value greater than 4. In some embodiments, when the DMRS configuration type associated with the data sharing channel is type 2, the first threshold can be 6 or a value greater than 6.

[0364] In some embodiments, if the first rule includes: 3) the value indicated by the antenna port indication field in the first downlink control information (DCI) is a first value, wherein the first value is any one of the first value set, the first value set is used to determine that the additional DMRS does not exist, and the first value set is configured by the network-side device, then if the network-side device does not configure the first value set, the terminal defaults to the first rule not being effective, and the terminal still transmits the data sharing channel according to the DMRS configuration information associated with the data sharing channel, that is, the terminal still receives the PDSCH according to the DMRS configuration information associated with the PDSCH, or the terminal still sends the PUSCH according to the DMRS configuration information associated with the PUSCH.

[0365] Regarding the values ​​contained in the first set of values, in some embodiments, the first set of values ​​when the DMRS configuration type associated with the data sharing channel is type 1 is different from the first set of values ​​when the DMRS configuration type associated with the data sharing channel is type 2.

[0366] For example, when the DMRS configuration type associated with the data sharing channel is DMRS type 1, the first set of values ​​can be {0,1,2,3}; when the DMRS configuration type associated with the data sharing channel is DMRS type 2, the first set of values ​​can be {4,5}.

[0367] In some embodiments, the first set of values ​​takes effect only if both codewords of the data sharing channel are activated simultaneously.

[0368] Regarding the value of the second value, in some embodiments, the second value when the DMRS configuration type associated with the data sharing channel is type 1 is different from the second value when the DMRS configuration type associated with the data sharing channel is type 2.

[0369] For example, when the DMRS configuration type associated with the data sharing channel is DMRS type 1, the second value can be one of {4, 5, 6, 7}; when the DMRS configuration type associated with the data sharing channel is DMRS type 2, the second value can be one of {6, 7, 8, 9}.

[0370] In some embodiments, the second value takes effect only if both codewords of the data sharing channel are activated simultaneously.

[0371] The channel transmission module 703 is used to use the resources corresponding to the additional DMRS as resources to carry at least a portion of the data sharing channel.

[0372] The resources corresponding to the additional DMRS are the resources configured or indicated by the network-side device for the additional DMRS.

[0373] The data sharing channel transmission apparatus 700 proposed in this application embodiment can determine that the additional DMRS associated with the data sharing channel does not exist when a first rule is met, and use the resources occupied by the additional DMRS as resources to carry at least part of the data sharing channel. This increases the resources used to transmit the data sharing channel, thereby improving spectral efficiency. In high-rank transmission scenarios, it can ensure that the throughput gain is not lost, or reduce the loss of throughput gain.

[0374] This application provides a data sharing channel transmission device. As an example, the data sharing channel transmission device can be a communication device or a component within a communication device, such as a chip. The communication device can be a terminal, a network-side device, or a server, etc. Exemplarily, the terminal can be, but is not limited to, the type of terminal 11 listed above, and the network-side device can be, but is not limited to, the type of network-side device 12 listed above. This application does not impose specific limitations.

[0375] The data sharing channel transmission device includes a processing module and a channel transmission module. The processing module and channel transmission module can be implemented in software or hardware. When implemented in hardware, the processing module can be implemented by a processor. For example, the processor can include general-purpose processors, special-purpose processors, such as a Central Processing Unit (CPU), microprocessor, Digital Signal Processor (DSP), Artificial Intelligence (AI) processor, Graphics Processing Unit (GPU), Application Specific Integrated Circuit (ASIC), Network Processor (NP), Field Programmable Gate Array (FPGA), or other programmable logic devices, gate circuits, transistors, discrete hardware components, etc. The receiving module and transmitting module can be implemented by a communication interface, which can include one or more of the following: transceiver, pins, circuits, bus, radio frequency unit, etc.

[0376] As shown in Figure 8, this application embodiment also provides a communication device 800, including a processor 801 and a memory 802. The memory 802 stores a program or instructions that can run on the processor 801. For example, when the communication device 800 is a terminal, the program or instructions executed by the processor 801 implement the various steps of the above-described data sharing channel transmission method embodiment and achieve the same technical effect. When the communication device 800 is a network-side device, the program or instructions executed by the processor 801 implement the various steps of the above-described data sharing channel transmission method embodiment and achieve the same technical effect. To avoid repetition, this will not be described again here.

[0377] This application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps in the method embodiments shown in FIG2 or FIG3. This terminal embodiment corresponds to the above-described terminal-side method embodiments, and all implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and can achieve the same technical effect. The terminal can be a data sharing channel transmission device as shown in FIG6. Specifically, FIG9 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of this application.

[0378] The terminal 900 includes, but is not limited to, at least some of the following components: radio frequency unit 901, network module 902, audio output unit 903, input unit 904, sensor 905, display unit 906, user input unit 907, interface unit 908, memory 909, and processor 910.

[0379] Those skilled in the art will understand that the terminal 900 may also include a power supply (such as a battery) for powering various components. The power supply can be logically connected to the processor 910 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The terminal structure shown in Figure 9 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0380] It should be understood that, in this embodiment, the input unit 904 may include a graphics processor 9041 and a microphone 9042. The graphics processor 9041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 906 may include a display panel 9061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 907 includes at least one of a touch panel 9071 and other input devices 9072. The touch panel 9071 is also called a touch screen. The touch panel 9071 may include a touch detection device and a touch controller. Other input devices 9072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0381] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 901 can transmit it to the processor 910 for processing; in addition, the radio frequency unit 901 can send uplink data to the network-side device. Typically, the radio frequency unit 901 includes, but is not limited to, antennas, amplifiers, transceivers, couplers, low-noise amplifiers, duplexers, etc.

[0382] The memory 909 can be used to store software programs or instructions, as well as various data. The memory 909 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 909 may include volatile memory or non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (Synchlink DRAM, SLDRAM), and direct memory bus RAM (DRRAM). The memory 909 in the embodiments of this application includes, but is not limited to, these and any other suitable types of memory.

[0383] Processor 910 may include one or more processing units; optionally, processor 910 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 910.

[0384] The processor 910 is used to determine that the additional demodulation reference signal DMRS associated with the data sharing channel does not exist when the first rule is satisfied.

[0385] Radio frequency unit 901 is used to use the resources corresponding to the additional DMRS as resources to carry at least a portion of the data sharing channel.

[0386] The terminal 900 provided in this application embodiment can determine that the additional DMRS associated with the data sharing channel does not exist when the first rule is met, and use the resources occupied by the additional DMRS as resources to carry at least part of the data sharing channel. This increases the resources used to transmit the data sharing channel, thereby improving spectrum efficiency. In high-rank transmission scenarios, it can ensure that the throughput gain is not lost, or reduce the loss of throughput gain.

[0387] It is understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiment shown in Figure 3, and achieve the same or corresponding technical effects. To avoid repetition, it will not be described again here.

[0388] This application also provides a network-side device, including a processor and a communication interface. The communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps of the method embodiment shown in FIG4. This network-side device embodiment corresponds to the above-described network-side device method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this network-side device embodiment and can achieve the same technical effect.

[0389] Specifically, this application embodiment also provides a network-side device, which can be the device shown in FIG. 7. As shown in FIG. 10, the network-side device 1000 includes: an antenna 101, a radio frequency device 102, a baseband device 103, a processor 104, and a memory 105. The antenna 101 is connected to the radio frequency device 102. In the uplink direction, the radio frequency device 102 receives information through the antenna 101 and sends the received information to the baseband device 103 for processing. In the downlink direction, the baseband device 103 processes the information to be transmitted and sends it to the radio frequency device 102. The radio frequency device 102 processes the received information and transmits it through the antenna 101.

[0390] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 103, which includes a baseband processor.

[0391] The baseband device 103 may include at least one baseband board, on which multiple chips are disposed, as shown in FIG10. One of the chips is, for example, a baseband processor, which is connected to the memory 105 via a bus interface to call the program in the memory 105 and execute the network device operation shown in the above method embodiment.

[0392] The network-side device may also include a network interface 106, such as a Common Public Radio Interface (CPRI).

[0393] Specifically, the network-side device 1000 in this application embodiment further includes: instructions or programs stored in memory 105 and executable on processor 104. Processor 104 calls the instructions or programs in memory 105 to execute the methods executed by each module shown in FIG7 and achieve the same technical effect. To avoid repetition, it will not be described in detail here.

[0394] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described data sharing channel transmission method embodiments and achieve the same technical effects. To avoid repetition, they will not be described again here.

[0395] The processor mentioned above is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0396] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described data sharing channel transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0397] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0398] This application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-described data sharing channel transmission method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0399] This application embodiment also provides a communication system, including: a terminal and a network-side device, wherein the terminal can be used to perform the steps of the data sharing channel transmission method shown in FIG2 or FIG3 as described above, and the network-side device can be used to perform the steps of the data sharing channel transmission method shown in FIG4 as described above.

[0400] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0401] From the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of computer software products plus necessary general-purpose hardware platforms, and of course, they can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes several instructions to cause the terminal or network-side device to execute the methods described in the various embodiments of this application.

[0402] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other implementations under the guidance of this application without departing from the spirit and scope of the claims. All of these implementations are within the protection scope of this application.

Claims

1. A method for transmitting data through a shared channel, comprising: If the terminal determines that the first rule is met, it will find that the additional demodulation reference signal DMRS associated with the data sharing channel does not exist; The terminal uses the resources corresponding to the additional DMRS as resources for at least a portion of the data sharing channel.

2. The method according to claim 1, wherein, The first rule includes at least one of the following: Both codewords corresponding to the data sharing channel are activated; The number of data streams transmitted through the data sharing channel is greater than the first threshold. The value indicated by the antenna port indication field in the first downlink control information (DCI) is a first value, wherein the first value is any one of the first value set, and the first value set is used to determine that the additional DMRS does not exist. The value indicated by the antenna port indication field in the first DCI is the second value, which is used to determine that the additional DMRS does not exist; The TDRA indicated by the Time Domain Resource Location (TDRA) indication field in the first DCI is the first TDRA, wherein the first TDRA is a TDRA in the TDRA list configured to indicate that an additional DMRS does not exist; The index of the modulation and coding scheme (MCS) corresponding to the data sharing channel is greater than the second threshold. The first DCI includes a status indication field, and the status indication field indicates a second status. The status indication field is used to indicate one of the first status and the second status. The first status is different from the second status. The second status is used to indicate that the terminal determines that the additional DMRS associated with the data sharing channel does not exist. The terminal is instructed by the network-side device to have multiple DMRS configurations, including a first DMRS configuration, in which there is no additional DMRS, and the terminal receives an instruction to switch to the first DMRS. The Radio Resource Control Protocol (RRC) signaling received by the terminal includes a first parameter; Wherein, the first DCI is the DCI that schedules the data sharing channel.

3. A method for transmitting data through a shared channel, the method comprising: The network-side equipment sends the Demodulation Reference Signal (DMRS) configuration information associated with the Data Sharing Channel to the terminal; If the network-side device determines that the additional DMRS associated with the data sharing channel does not exist, the first rule must be met. The network-side device uses the resources corresponding to the additional DMRS as resources to carry at least a portion of the data sharing channel.

4. The method according to claim 3, wherein, The DMRS configuration information includes at least one of the following: DMRS type; Additional DMRS configuration information; Maximum length of the front DMRS.

5. The method according to claim 3 or 4, wherein, The first rule includes at least one of the following: Both codewords corresponding to the data sharing channel are activated; The number of data streams transmitted through the data sharing channel is greater than the first threshold. The value indicated by the antenna port indication field in the first downlink control information (DCI) is a first value, wherein the first value is any one of the first value set, and the first value set is used to determine that the additional DMRS does not exist. The value indicated by the antenna port indication field in the first DCI is the second value, which is used to determine that the additional DMRS does not exist; The TDRA indicated by the Time Domain Resource Location (TDRA) indication field in the first DCI is the first TDRA, wherein the first TDRA is a TDRA in the TDRA list configured to indicate that an additional DMRS does not exist; The index of the modulation and coding scheme (MCS) corresponding to the data sharing channel is greater than the second threshold. The first DCI includes a status indication field, and the status indication field indicates a second status. The status indication field is used to indicate one of the first status and the second status. The first status is different from the second status. The second status is used to indicate that the terminal determines that the additional DMRS associated with the data sharing channel does not exist. The terminal is instructed by the network-side device to have multiple DMRS configurations, including a first DMRS configuration, in which there is no additional DMRS, and the terminal receives an instruction to switch to the first DMRS. The Radio Resource Control Protocol (RRC) signaling received by the terminal includes a first parameter; Wherein, the first DCI is the DCI that schedules the data sharing channel.

6. A data sharing channel transmission apparatus, comprising: The processing module is used to determine that the additional demodulation reference signal DMRS associated with the data sharing channel does not exist if the first rule is satisfied. A channel transmission module is used to use the resources corresponding to the additional DMRS as resources to carry at least a portion of the data sharing channel.

7. A data sharing channel transmission apparatus, comprising: The information configuration module is used to send the demodulation reference signal (DMRS) configuration information associated with the data sharing channel to the terminal. The processing module is used to determine that, if the first rule is satisfied, the additional DMRS associated with the data sharing channel does not exist; A channel transmission module is used to use the resources corresponding to the additional DMRS as resources to carry at least a portion of the data sharing channel.

8. A terminal comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the data sharing channel transmission method as described in claim 1 or 2.

9. A network-side device, comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the data sharing channel transmission method as described in any one of claims 3 to 5.

10. A readable storage medium storing a program or instructions that, when executed by a processor, implement the data sharing channel transmission method as described in any one of claims 1 to 5.

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