WO2021043058A1 - Data transmission method and apparatus, and transmission receive point, terminal and medium - Google Patents

Abstract

Disclosed are a data transmission method and apparatus, and a transmission receive point, a terminal and a medium. The data transmission method comprises: sending downlink control information, the downlink control information being used for indicating repeated transmission information of a physical channel; and performing data transmission with a terminal according to the repeated transmission information.

Description

Data transmission method, device, transmission receiving node, terminal and medium

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office with an application number of 201910828952.5 on September 3, 2019. The entire content of this application is incorporated into this application by reference.

Technical field

This application relates to the field of wireless communication networks, for example, to a data transmission method, device, transmission and receiving node, terminal, and medium.

Background technique

In the New Radio (NR) release-15 (Release-15) version, the repeat transmission mechanism of uplink data can be configured semi-statically through high-level radio resource control (Radio Resource Control, RRC) signaling, but this semi-static The configured repeated transmission mechanism is single and cannot be dynamically configured according to channel scene changes. It also does not support the joint transmission of multiple transmission receiving nodes (Transmission Receive Point, TRP), resulting in low resource utilization of the physical channel and data transmission during the data transmission process. low efficiency.

Summary of the invention

This application provides a data transmission method, device, transmission receiving node, terminal, and medium to improve the resource utilization rate and transmission efficiency of repeated transmission.

The embodiment of the application provides a data transmission method, including:

Sending downlink control information (Downlink Control Information, DCI), where the downlink control information is used to indicate repeated transmission information of the physical channel;

Perform data transmission with the terminal according to the repeated transmission information.

The embodiment of the present application also provides a data transmission method, including:

Receiving downlink control information, where the downlink control information is used to indicate repeated transmission information of a physical channel;

Perform data transmission with the transmission receiving node according to the repeated transmission information.

An embodiment of the present application also provides a data transmission device, including:

A sending module, configured to send downlink control information, where the downlink control information is used to indicate repeated transmission information of the physical channel;

The first transmission module is configured to perform data transmission with the terminal according to the repeated transmission information.

An embodiment of the present application also provides a data transmission device, including:

A receiving module, configured to receive downlink control information, where the downlink control information is used to indicate repeated transmission information of a physical channel;

The second transmission module is configured to perform data transmission with the transmission receiving node according to the repeated transmission information

The embodiment of the present application also provides a data transmission receiving node, including:

One or more processors;

Storage device, set to store one or more programs;

When the one or more programs are executed by the one or more processors, the one or more processors implement the aforementioned data transmission method.

The embodiment of the present application also provides a terminal, including:

One or more processors;

Storage device, set to store one or more programs;

When the one or more programs are executed by the one or more processors, the one or more processors implement the aforementioned data transmission method.

The embodiment of the present application also provides a computer-readable storage medium, and a computer program is stored on the computer-readable storage medium, and the program is executed by a processor to realize the above-mentioned data transmission method.

Description of the drawings

FIG. 1 is a flowchart of a data transmission method provided by an embodiment;

FIG. 2 is a schematic diagram of a repeated transmission pattern provided by an embodiment;

FIG. 3 is a flowchart of another data transmission method provided by an embodiment;

FIG. 4 is a schematic structural diagram of a data transmission device provided by an embodiment;

FIG. 5 is a schematic structural diagram of another data transmission device provided by an embodiment;

FIG. 6 is a schematic structural diagram of a data transmission receiving node provided by an embodiment;

FIG. 7 is a schematic structural diagram of a terminal provided by an embodiment.

detailed description

The application will be described below with reference to the drawings and embodiments.

For the repeated transmission of the physical channel, the related technology only supports a single transmitting receiving node to semi-statically configure the number of repeated transmissions through RRC signaling to achieve repeated transmission with the terminal. However, this repeated transmission cannot be applied to different channel scenarios. Joint transmission of multiple TRPs is not supported. In the embodiment of this application, a data transmission method is provided. The repeated transmission information of a physical channel is dynamically indicated through downlink control information. The repeated transmission information can be dynamically changed according to the change of the channel and indicated to the terminal. The TRP and the terminal are in accordance with the dynamic The indicated repeated transmission information is used for data transmission, thereby making the repeated transmission mode more flexible, suitable for different channel scenarios, and improving resource utilization and transmission efficiency.

Fig. 1 is a flowchart of a data transmission method provided by an embodiment. The data transmission method of this embodiment is applied to TRP, which can be a base station of a cell, a base station or transmission node of a small cell, a sending node in a TRP high-frequency communication system, a sending node in an Internet of Things system, and satellite communication Satellites in China. As shown in FIG. 1, the method provided in this embodiment includes step S110 and step S120.

In step S110, downlink control information is sent, where the downlink control information is used to indicate repeated transmission information of the physical channel.

In this embodiment, the physical channel includes at least one of Physical Uplink Shared Channel (PUSCH), Physical Uplink Control Channel (PUCCH), and Physical Downlink Shared Channel (PDSCH). Kind. Repetitive transmission information may be for at least one of the following: PDSCH or PUSCH information, physical downlink control channel (PDCCH) or PUCCH information, downlink/uplink demodulation reference signal (Demodulation Reference Signal, DMRS), random access Incoming uplink signal, sounding reference signal (Sounding Reference Signal, SRS) and phase tracking reference signal (Phase-tracking Reference Signals, PT-RS).

The repetitive transmission information includes at least one of the following: the number of repetitive transmissions or recorded as repetition factor (Repetition Factor, RF), SRS resource index, transmission configuration indication (Transmission Configuration Indication, TCI) status, repetitive transmission pattern, and DMRS port. Different repeated transmission information can be indicated by different indication fields of the DCI.

In step S120, data transmission is performed with the terminal according to the repeated transmission information.

In this embodiment, the terminal may be a node in a communication system such as a user terminal (User Equipment, UE), a mobile phone, a portable device, and an automobile. The TRP sends downlink data to the terminal according to the repeated transmission information of the physical channel indicated in the DCI, and can also receive uplink data sent by the terminal.

In this embodiment, the beam may be represented by a spatial domain transmission filter (Spatial Domain Transmission Filter) or a spatial domain receiving filter, or may be represented by a reference signal or a quasi-co-located (QCL) signal block. For example, the terminal uses the same spatial transmission filter as the SRS resource 1 to transmit PUSCH, or if TRP indicates that the PUSCH transmitted by the terminal has a QCL relationship with reference signal A or synchronization signal block, it means that the terminal uses and transmits/receives reference signal A. Or a spatial transmission filter with the same synchronization signal block transmits the PUSCH.

In this embodiment, DCI is used to indicate the repeated transmission information of the physical channel. The repeated transmission information can be changed according to the change of the channel and dynamically indicated to the terminal through DCI. The TRP and the terminal perform data transmission according to the dynamically indicated repeated transmission information, so that the repeated transmission is performed. The method is more flexible, thereby improving resource utilization and transmission efficiency.

In an embodiment, for the repeated transmission of Ultra Reliable Low Latency Communications (URLLC) services under multiple TRPs, it may be Space Division Multiplexing (SDM) or frequency division. Multiplexing (Frequency Division Multiplexing, FDM) or time division multiplexing (Time Division Multiplexing, TDM), where TDM can be time division within a time slot, that is, different TRPs occupy different symbols in a time slot, or time Slot time division, that is, different TRPs occupy different time slots.

In an embodiment, the repeated transmission information includes the number of repeated transmissions and the SRS resource index, where the number of repeated transmissions is a non-negative integer; the number of repeated transmissions and the SRS resource index are indicated by the sounding reference signal resource indicator (SRS Resource Indicator, SRI) of the DCI Domain joint instructions.

In an embodiment, when the physical channel is the PUSCH, the PUSCH is based on codebook or non-codebook transmission, and when the PUSCH is based on non-codebook transmission, the retransmission information further includes indication information for early termination of repetition.

Table 1 Repetitive transmission information indicated by the SRI field in codebook-based PUSCH transmission

Taking the case of 4 SRS resources and the maximum spatial multiplexing of 1 layer as an example, Table 1 is the repeated transmission information indicated by the SRI field in the codebook-based PUSCH transmission provided by an embodiment; Table 2 is the information provided by an embodiment based on The repeated transmission information indicated by the SRI field in the PUSCH transmission of the non-codebook. Table 1 and Table 2 both contain non-repetitive transmissions (the number of repeated transmissions is 0 or 1). Table 2 can support the use of fixed beams for PUSCH repeated transmission (for example, the repeated transmission information indicated by the SRI field is: 1 (RF=2)), and it can also support the use of different beams for different time slots or time domain symbols. PUSCH repeated transmission (for example, the repeated transmission information indicated by the SRI field is: 0; 1 (RF=2), which means that the same spatial transmission filter as the SRS resource 0 is used to transmit the PUSCH in the uplink time slot N. The next uplink time slot of slot N uses the same spatial transmission filter to transmit the SRS resource 1 to repeatedly transmit the PUSCH. N _SRS represents the number of configured SRS resources.

Table 2 Repeated transmission information indicated by the SRI field in PUSCH transmission based on non-codebook

In addition, as shown in Table 2, the 12th bit index (bit index of 11) in the SRI field can be used to indicate early termination of PUSCH repeated transmission, and the 13th-16th bit index (bit index of 12-15) is the pre- The reserved bits can be used to indicate repeated transmission of information or other information in this embodiment according to actual needs. For PUSCH, TRP uses SRS resource index (indicated by SRI) or transmission configuration indication TCI to indicate the beam used by the terminal to transmit PUSCH. The repeated transmission information indicated by the SRI field in Table 1 and Table 2 is only an exemplary description. In practical applications, each bit in the SRI field may also indicate other SRS resource indexes and the number of repeated transmissions.

In an embodiment, when there are at least two SRS resources, the repeated transmission information indicates that the same spatial transmission filter used for transmitting each sounding reference signal resource is used in sequence for a set number of times or half of the set number of times. Repeated transmission. For example, in Table 2, in _{the case of N SRS} = 2, the repeated transmission information indicated by the 6th bit index of the SRI field is: 1 (RF = 4), which means that the same spatial domain transmission filter as the transmission SRS resource 1 is used to transmit PUSCH; In _{the case of N SRS} = 3, the repetitive transmission information indicated by the 13th bit index of the SRI field is: 0; 2 (RF = 4), which means that the same uplink time slot N is used to send SRS resource 0 The spatial transmission filter transmits the PUSCH, and the same spatial transmission filter as the SRS resource 2 is used to repeatedly transmit the PUSCH in the next uplink time slot of the uplink time slot N. The same spatial transmission filter as the transmission SRS resource 0 can be used for the first two repeated transmissions, and the same spatial transmission filter as the transmission SRS resource 2 can be used for the next two repeated transmissions; or, the two spatial transmission filters alternately perform repeated transmissions , That is, the same spatial transmission filter as the transmission SRS resource 0 is used for the first and third repeated transmissions, and the same spatial transmission filter as the transmission SRS resource 2 is used for the second and fourth repeated transmissions.

In an embodiment, the repeated transmission information includes the TCI state; the repeated transmission information is indicated by the TCI field of the DCI; the TCI state includes at least one of the following information: the number of repeated transmissions, the SRS resource index, and the channel state information reference signal (Channel State Information). Information-Reference Signal (CSI-RS) resource index and Synchronize Signal Block (SSB) index.

In an embodiment, the TCI state is one of the candidate TCI states configured by the high-level RRC signaling; the number of bits indicating the TCI state is determined according to the number of the TCI states configured by the high-level RRC signaling. For example, 64 TCI states are configured through RRC signaling, and one of the TCI states is indicated to the terminal through the TCI field in the DCI.

In an embodiment, the TCI state is one of the candidate TCI states activated by Media Access Control Control Element (MAC CE) signaling; the number of bits indicating the TCI state is activated according to MAC CE signaling. The number of states is determined. For example, 64 TCI states are configured through RRC signaling, 8 candidate TCI states are activated through MAC CE signaling, and one TCI state is selected from the 8 candidate TCI states through the 3-bit TCI field in DCI to indicate to the terminal.

Table 3 is the repeated transmission information indicated by the TCI field provided in an embodiment. As shown in Table 3, different values of the TCI field correspond to different TCI states. For example, the bit value of the TCI field is 000 to indicate TCI state 0, and TCI state 0 includes: using SRS resource 2 for repeated transmission, and the number of repeated transmissions is 4; for another example, the bit value of the TCI field is 011 to indicate TCI state 3 , TCI state 3 includes: using the same spatial domain transmission filter as the received CSI-RS resource 0 for repeated transmission, and the number of repeated transmissions is 8; for another example, the bit value of the TCI domain is 100 to indicate TCI State 4, TCI State 4 includes: using the same spatial transmission filter as the receiving SSB resource 2 for repeated transmission, and the number of repeated transmissions is 4.

Table 3 Repeated transmission information indicated by the TCI field

The repeated transmission information indicated by the TCI field in Table 3 is only an exemplary description. In practical applications, different bits in the TCI field may also indicate other TCI states.

In this embodiment, the TCI field may be the TCI field in the DCI for scheduling PDSCH, or the TCI field in the DCI for scheduling PUSCH, or the TCI field in the DCI used for group user scheduling or group user signaling.

In this embodiment, the parameters in the TCI state do not include RF parameters, or include RF parameters and RF=0 or RF=1, it means that no repeated transmission is performed or the number of repeated transmissions is 1.

In an embodiment, the repeated transmission information includes the number of repeated transmissions, and the number of repeated transmissions is one of the candidate repeated transmission times configured by higher layer signaling, or one of the candidate repeated transmission times predefined by the terminal; The information is indicated by the newly added indication field in the DCI, and the newly added indication field is 2 bits or 3 bits.

In this embodiment, a group of repeated transmission times is configured through high-level signaling, and the group contains 4 or 8 repeated transmission times. A 2-bit or 3-bit indication field is added to the uplink scheduling DCI for Instruct the terminal to dynamically select a number of repeated transmissions from this set of repeated transmissions.

Alternatively, TRP configures the number of repeated transmissions for multiple groups through high-level signaling, then activates one of the multiple groups through medium access control unit signaling, and then instructs the terminal to dynamically move from the number of repeated transmissions in this group through the indication field in the DCI Select a number of repeated transmissions.

Alternatively, the TRP and the terminal predefine a set of repeated transmission times, and the base station instructs the terminal to dynamically select a repeated transmission number from this set of repeated transmission times through the indication field in the DCI.

In an embodiment, the repeated transmission information includes the number of repeated transmissions; when the physical channel is PUSCH, the PUSCH uses resource allocation type 1, PUSCH non-frequency hopping transmission, and the defined dynamic repeated transmission enable parameter takes the value 1 and When the high-level parameters include 4 offset values, the repeated transmission information is indicated by the set number of high-order bits in the frequency domain resource allocation field in DCI, and the remaining bits in the frequency-domain resource allocation field except for the set number of high-order bits It is set to indicate frequency domain resource allocation; wherein, the total number of bits in the frequency domain resource allocation domain is determined according to the number of resource blocks occupied by the user bandwidth part.

比特指示频域资源分配，其中，高层参数为跳频偏移列表(可记为Frequency Hopping Offset Lists)；上述任一条件不满足，则频域资源分配域的全部比特用于指示频域资源分配。频域资源分配域的比特总数量为

其中，

为用户带宽部分(Bandwidth Part，BWP)所占的RB数量。 In this embodiment, a new RRC parameter is defined for a terminal of Release-17 or Release-17 or above, that is, a dynamic repetitive transmission enable parameter (which can be recorded as Dynamic Repetition Enable). In the case of PUSCH using resource allocation type 1, no frequency domain hopping, the value of the dynamic repeated transmission enable parameter is 1, and the upper layer parameter contains 4 offset values (ie N _{UL_hop} = 2), the DCI intermediate frequency is used The upper 2 bits of the domain resource allocation domain dynamically indicate the number of repeated transmissions of the PUSCH, and the rest

The bits indicate frequency domain resource allocation, among which, the high-level parameter is the frequency hopping offset list (which can be recorded as Frequency Hopping Offset Lists); if any of the above conditions is not met, all bits in the frequency domain resource allocation domain are used to indicate frequency domain resource allocation . The total number of bits in the frequency domain resource allocation domain is

among them,

It is the number of RBs occupied by the user bandwidth part (Bandwidth Part, BWP).

In this embodiment, the number of repeated transmissions is one of the number of candidate repeated transmissions, and the number of candidate repeated transmissions is configured by RRC signaling or predefined by the TRP and the terminal. For example, the TRP may pre-configure a set of PUSCH repeated transmission times through RRC signaling, and the group includes 4 repeated transmission times; or the TRP and the terminal may predefine a set of PUSCH repeated transmission times.

Table 4 Repetitive transmission information indicated by the set number of high bits in the frequency domain resource allocation field

Table 4 is the repeated transmission information indicated by the set number of high bits in the frequency domain resource allocation field provided by an embodiment. As shown in Table 4, different values of the upper 2 bits of the frequency domain resource allocation field are used to indicate different retransmission times. For example, if the value of the upper 2 bits is 10, the number of repeated transmissions of the indicated PUSCH is 4. The repetitive transmission information indicated by the set number of high-order bits in the frequency domain resource allocation field in Table 4 is only exemplary. In practical applications, the set number of high-order bits in the frequency domain resource allocation field can also indicate other repetitions. Number of transfers.

In an embodiment, the repetitive transmission information includes a repetition pattern (Repetition Pattern) and the number of repetitive transmissions; or, the repetitive transmission information includes a repetitive transmission pattern, and the repetitive transmission number is configured by RRC signaling.

In an embodiment, the repeated transmission pattern and the number of repeated transmissions are dynamically and jointly indicated by DCI.

Table 5 Repeated transmission information indicated by the DCI field

Table 5 is the repeated transmission information indicated by the DCI field provided in an embodiment. In this embodiment, different bit values can be used to indicate different repeated transmission times or repeated transmission patterns. For example, when the bit value is 011, the indicated number of repeated transmissions is 16, and the repeated transmission pattern is c.

The repeated transmission information indicated by the DCI field in Table 5 is only exemplary. In practical applications, the value of the bits in the DCI field may also correspond to other repeated transmission times.

Fig. 2 is a schematic diagram of a repeated transmission pattern provided by an embodiment. As shown in FIG. 2, three repetitive transmission patterns are pre-configured in this embodiment, including pattern a, pattern b, and pattern c, which are used to indicate the number of repeated transmissions between the TRP and the terminal. For example, pattern a indicates that the number of repeated transmissions between the TRP and the terminal is 4, and the first two repeated transmissions are between the first TRP and the terminal, and the last two repeated transmissions are between the second TRP and the terminal; pattern b Indicates that the number of repeated transmissions between the TRP and the terminal is 4, and the first and third repeated transmissions are between the first TRP and the terminal, and the second and fourth repeated transmissions are between the second TRP and the terminal. Pattern c indicates that the number of repeated transmissions between the TRP and the terminal is 4, and each repeated transmission is between two TRPs and the terminal.

In an embodiment, the repeated transmission pattern is dynamically indicated through DCI, and the number of repeated transmissions is configured by RRC signaling.

In an embodiment, the repeated transmission information includes the number of repeated transmissions; when the TRP scheduling method for the terminal uplink transmission is Single-User Multiple-Input Multiple-Output (SU-MIMO), the repeated The transmission information is indicated by some or all bits in the antenna port (Antenna Ports) field in the DCI.

In one embodiment, when the number of spatial multiplexing layers of PUSCH or PUCCH is 1, the demodulation reference signal port is port 0 by default; when the number of spatial multiplexing layers of PUSCH or PUCCH is 2, demodulation The reference signal port defaults to port 0 and port 1.

In this embodiment, the TRP scheduling method for the terminal uplink transmission is SU-MIMO. When the PUSCH or PUCCH is repeated transmission, the number of repeated transmissions of the PUSCH or PUCCH is dynamically indicated through the antenna port field in the DCI. In this case, if the PUSCH or PUCCH spatial multiplexing layer number is 1, the DMRS port defaults to port 0; if the PUSCH or PUCCH spatial multiplexing layer number is 2, the DMRS port defaults to port 0 and port 1.

Table 6 Repeated transmission information indicated by the antenna port field

Table 6 is the repeated transmission information indicated by the antenna port field provided in an embodiment. In this embodiment, different bit values in the antenna port field can be used to indicate different repeated transmission times. For example, when the bit value is 11, the number of repeated transmissions of the indicated PUSCH or PUCCH is 8. The repeated transmission information indicated by the antenna port field in Table 6 is only an exemplary description. In practical applications, the bit value of the antenna port field may also correspond to other repeated transmission times.

In this embodiment, in the case where the repeated transmission information is indicated by some bits in the antenna port field in the DCI, the partial bits are the high-order partial bits or the low-order partial bits in the antenna port field.

In an embodiment, the repeated transmission information includes the number of repeated transmissions and the DMRS port; the number of repeated transmissions and the DMRS port are jointly indicated by the antenna port field in the DCI.

In this embodiment, when the PUSCH or PUCCH is repeatedly transmitted, the TRP uses the antenna port field in the DCI to jointly indicate the number of PUSCH or PUCCH repeated transmissions and the DMRS port to the terminal.

Table 7 is the repeated transmission information indicated by the antenna port domain in an embodiment. In this embodiment, different bit values in the antenna port field can be used to dynamically and jointly indicate different retransmission times and DMRS ports. For example, when the bit value is 1111, the indicated number of repeated transmissions of PUSCH or PUCCH is 8, and the indicated DMRS port is port 3. The repeated transmission information indicated by the antenna port field in Table 7 is only an exemplary description. In practical applications, the bit value of the antenna port field may also correspond to other repeated transmission times and DMRS ports.

Table 7 Repeated transmission information indicated by the antenna port field

In the data transmission method of the above embodiment, the repeated transmission information of the physical channel can be indicated through various indication fields in the DCI. The repeated transmission information can be changed according to the change of the channel and dynamically indicated to the terminal through the DCI. The TRP and the terminal are in accordance with the dynamics. The indicated repeated transmission information is used for data transmission, which makes the repeated transmission mode more flexible, thereby improving resource utilization and transmission efficiency.

The embodiment of the present application also provides a flowchart of another data transmission method. The data transmission method of this embodiment is applied to a terminal, and the terminal may be a node in a communication system such as a UE, a mobile phone, a portable device, and a car.

Fig. 3 is a flowchart of another data transmission method provided by an embodiment. As shown in FIG. 3, the method provided in this embodiment includes step S210 and step S220. For technical details that are not described in detail in this embodiment, reference may be made to any of the foregoing embodiments.

In step S210, downlink control information is received, where the downlink control information is used to indicate repeated transmission information of the physical channel.

In step S220, data transmission is performed with the transmission receiving node according to the repeated transmission information.

In an embodiment, the repeated transmission information includes the number of repeated transmissions and a sounding reference signal resource index, wherein the number of repeated transmissions is a non-negative integer; the number of repeated transmissions and the sounding reference signal resource index pass through the Joint indication of the sounding reference signal resource indication field of the downlink control information.

In an embodiment, when the physical channel is a physical uplink shared channel, the physical uplink shared channel is based on codebook or non-codebook transmission; when the physical uplink shared channel is based on non-codebook transmission Hereinafter, the repeated transmission information also includes indication information for premature termination of repetition.

In an embodiment, in a case where there are at least two sounding reference signal resources, the repeated transmission information indicates that the same spatial transmission filter used for transmitting each sounding reference signal resource is used in sequence for a set number of times or a set number of times. Half the number of repeated transmissions.

In an embodiment, the repeated transmission information includes a sending configuration indication status; the repeated transmission information is indicated by a sending configuration indication field of the downlink control information; the sending configuration indication status includes at least one of the following information: The number of repeated transmissions, sounding reference signal resource index, channel state information reference signal resource index, and synchronization signal block index.

In an embodiment, the transmission configuration indication state is one of the candidate transmission configuration indication states of the high-level radio resource control signaling configuration; the number of bits indicating the transmission configuration indication state is based on the high-level radio resource control signaling The number of configured sending configuration indication states is determined.

In an embodiment, the transmission configuration indication state is one of the candidate transmission configuration indication states activated by medium access control unit signaling; the number of bits indicating the transmission configuration indication state is based on the medium access control unit information. Let the number of active sending configuration indication states be determined.

In an embodiment, the repeated transmission information includes the number of repeated transmissions, and the number of repeated transmissions is one of the candidate repeated transmission times configured by higher layer signaling, or is one of the candidate repeated transmission times predefined by the terminal. The repeated transmission information is indicated by the newly added indication field in the downlink control information, and the newly added indication field is 2 bits or 3 bits.

In an embodiment, the repeated transmission information includes the number of repeated transmissions; when the physical channel is a physical uplink shared channel, the physical uplink shared channel uses resource allocation type 1, physical uplink shared channel non-frequency hopping When the transmission and defined dynamic retransmission enable parameter takes a value of 1 and the high-level parameter contains 4 offset values, the retransmission information passes the set amount of the frequency domain resource allocation field in the downlink control information. High-order bits indicate that the remaining bits in the frequency-domain resource allocation field except for the set number of high-order bits are set to indicate frequency-domain resource allocation; wherein the total number of bits in the frequency-domain resource allocation field is based on the user bandwidth part The number of occupied resource blocks is determined.

In an embodiment, the number of repeated transmissions is one of the number of candidate repeated transmissions, and the number of candidate repeated transmissions is configured by radio resource control signaling, or is predefined by the transmitting receiving node and the terminal.

In an embodiment, the repeated transmission information includes a repeated transmission pattern and the number of repeated transmissions; or, the repeated transmission information includes a repeated transmission pattern, and the number of repeated transmissions is configured by radio resource control signaling.

In an embodiment, the repeated transmission information includes the number of repeated transmissions; in the case that the transmission receiving node schedules the terminal uplink transmission to a single user multiple input multiple output, the repeated transmission information passes through the downlink control information. The antenna port domain indication.

In an embodiment, when the number of spatial multiplexing layers of the physical uplink shared channel or the physical uplink control channel is 1, the demodulation reference signal port is port 0 by default;

When the number of spatial multiplexing layers of the physical uplink shared channel or the physical uplink control channel is 2, the demodulation reference signal ports are port 0 and port 1 by default.

In an embodiment, the repeated transmission information includes the number of repeated transmissions and the demodulation reference signal port; the number of repeated transmissions and the demodulation reference signal port are jointly indicated by the antenna port domain in the downlink control information.

In this embodiment, according to the repeated transmission information of the physical channel indicated in the downlink control information, the terminal may perform repeated transmission based on the corresponding SRS resource, CRI-RS resource, SSB, etc., or perform repeated transmission according to the repeated transmission pattern, or may perform repeated transmission based on the repeated transmission pattern. A certain number of repeated transmissions, etc. The terminal receives the downlink control information. The various indication fields in the downlink control information can be used to indicate the repeated transmission of information. The repeated transmission information can be changed according to the change of the channel and dynamically indicated to the terminal through DCI. The TRP and the terminal follow the dynamic instructions. Repeated transmission of information for data transmission makes the repeated transmission method more flexible, thereby improving resource utilization and transmission efficiency.

The embodiment of the present application also provides a data transmission device. FIG. 4 is a schematic structural diagram of a data transmission device provided by an embodiment. As shown in FIG. 4, the data transmission device includes: a sending module 310 and a first transmission module 320.

The sending module 310 is configured to send downlink control information, where the downlink control information is used to indicate repeated transmission information of the physical channel; the first transmission module 320 is configured to perform data transmission with the terminal according to the repeated transmission information.

The data transmission device of this embodiment can indicate the repeated transmission information of the physical channel through various indication fields in the DCI. The repeated transmission information can be changed according to the change of the channel and dynamically indicated to the terminal through the DCI. The TRP and the terminal are in accordance with the dynamics The indicated repeated transmission information is used for data transmission, which makes the repeated transmission mode more flexible, thereby improving resource utilization and transmission efficiency.

In an embodiment, the repeated transmission information includes the number of repeated transmissions and a sounding reference signal resource index, wherein the number of repeated transmissions is a non-negative integer; the number of repeated transmissions and the sounding reference signal resource index pass through the Joint indication of the sounding reference signal resource indication field of the downlink control information.

In an embodiment, when the physical channel is a physical uplink shared channel, the physical uplink shared channel is based on codebook or non-codebook transmission; when the physical uplink shared channel is based on non-codebook transmission Hereinafter, the repeated transmission information also includes indication information for early termination of repetition.

In an embodiment, in a case where there are at least two sounding reference signal resources, the repeated transmission information indicates that the same spatial transmission filter used for transmitting each sounding reference signal resource is used in sequence for a set number of times or a set number of times. Half the number of repeated transmissions.

In an embodiment, the repeated transmission information includes a sending configuration indication status; the repeated transmission information is indicated by a sending configuration indication field of the downlink control information; the sending configuration indication status includes at least one of the following: number of repeated transmissions , Sounding reference signal resource index, channel state information reference signal resource index and synchronization signal block index.

In an embodiment, the transmission configuration indication state is one of the candidate transmission configuration indication states of the high-level radio resource control signaling configuration; the number of bits indicating the transmission configuration indication state is based on the high-level radio resource control signaling The number of configured sending configuration indication states is determined.

In an embodiment, the transmission configuration indication state is one of the candidate transmission configuration indication states activated by medium access control unit signaling; the number of bits indicating the transmission configuration indication state is based on the medium access control unit information. Let the number of active sending configuration indication states be determined.

In an embodiment, the repeated transmission information includes the number of repeated transmissions, and the number of repeated transmissions is one of the candidate repeated transmission times configured by higher layer signaling, or is one of the candidate repeated transmission times predefined by the terminal. The repeated transmission information is indicated by the newly added indication field in the downlink control information, and the newly added indication field is 2 bits or 3 bits.

In an embodiment, the repeated transmission information includes the number of repeated transmissions; when the physical channel is a physical uplink shared channel, the physical uplink shared channel uses resource allocation type 1, physical uplink shared channel non-frequency hopping When the transmission and defined dynamic retransmission enable parameter takes a value of 1 and the high-level parameter contains 4 offset values, the retransmission information passes the set amount of the frequency domain resource allocation field in the downlink control information. High-order bits indicate that the remaining bits in the frequency-domain resource allocation field except for the set number of high-order bits are set to indicate frequency-domain resource allocation; wherein, the total number of bits in the frequency-domain resource allocation field is based on the user bandwidth portion The number of occupied resource blocks is determined.

In an embodiment, the number of repeated transmissions is one of the number of candidate repeated transmissions, and the number of candidate repeated transmissions is configured by radio resource control signaling, or is predefined by the transmitting receiving node and the terminal.

In an embodiment, the repeated transmission information includes a repeated transmission pattern and the number of repeated transmissions; or, the repeated transmission information includes a repeated transmission pattern, and the number of repeated transmissions is configured by radio resource control signaling.

In an embodiment, the repeated transmission information includes the number of repeated transmissions; in the case where the transmission receiving node schedules the terminal uplink transmission to a single user multiple input multiple output, the repeated transmission information passes through the downlink control information The antenna port domain indication.

In an embodiment, when the number of spatial multiplexing layers of the physical uplink shared channel or the physical uplink control channel is 1, the demodulation reference signal port defaults to port 0; in the space of the physical uplink shared channel or the physical uplink control channel When the number of multiplexing layers is 2, the demodulation reference signal ports are port 0 and port 1 by default.

In an embodiment, the repeated transmission information includes the number of repeated transmissions and the demodulation reference signal port; the number of repeated transmissions and the demodulation reference signal port are jointly indicated by the antenna port field in the downlink control information.

The embodiment of the present application also provides a data transmission device. FIG. 5 is a schematic structural diagram of another data transmission device provided by an embodiment. As shown in FIG. 5, the data transmission device includes: a receiving module 410 and a second transmission module 420.

The receiving module 410 is configured to receive downlink control information, where the downlink control information is used to indicate repeated transmission information of the physical channel; the second transmission module 420 is configured to perform data transmission with the transmission receiving node according to the repeated transmission information.

In an embodiment, the repeated transmission information includes the number of repeated transmissions and a sounding reference signal resource index, wherein the number of repeated transmissions is a non-negative integer; the number of repeated transmissions and the sounding reference signal resource index pass through the Joint indication of the sounding reference signal resource indication field of the downlink control information.

In an embodiment, in a case where the physical channel is a physical uplink shared channel, the repeated transmission information further includes indication information for early termination of repetition.

In an embodiment, in a case where there are at least two sounding reference signal resources, the repeated transmission information indicates that the same spatial transmission filter used for transmitting each sounding reference signal resource is used in sequence for a set number of times or a set number of times. Half the number of repeated transmissions.

In an embodiment, the repeated transmission information includes a sending configuration indication status; the repeated transmission information is indicated by a sending configuration indication field of the downlink control information; the sending configuration indication status includes at least one of the following information: The number of repeated transmissions, sounding reference signal resource index, channel state information reference signal resource index, and synchronization signal block index.

In an embodiment, the transmission configuration indication state is one of the candidate transmission configuration indication states of the high-level radio resource control signaling configuration; the number of bits indicating the transmission configuration indication state is based on the high-level radio resource control signaling The number of configured sending configuration indication states is determined.

In an embodiment, the transmission configuration indication state is one of the candidate transmission configuration indication states activated by medium access control unit signaling; the number of bits indicating the transmission configuration indication state is based on the medium access control unit information. Let the number of active sending configuration indication states be determined.

In an embodiment, the repeated transmission information includes the number of repeated transmissions, and the number of repeated transmissions is one of the candidate repeated transmission times configured by higher layer signaling, or is one of the candidate repeated transmission times predefined by the terminal. The repeated transmission information is indicated by the newly added indication field in the downlink control information, and the newly added indication field is 2 bits or 3 bits.

In an embodiment, the repeated transmission information includes the number of repeated transmissions; when the physical channel is a physical uplink shared channel, the physical uplink shared channel uses resource allocation type 1, physical uplink shared channel non-frequency hopping When the transmission and defined dynamic retransmission enable parameter takes a value of 1 and the high-level parameter contains 4 offset values, the retransmission information passes the set amount of the frequency domain resource allocation field in the downlink control information. High-order bits indicate that the remaining bits in the frequency-domain resource allocation field except for the set number of high-order bits are set to indicate frequency-domain resource allocation; wherein the total number of bits in the frequency-domain resource allocation field is based on the user bandwidth part The number of occupied resource blocks is determined.

In an embodiment, the number of repeated transmissions is one of the number of candidate repeated transmissions, and the number of candidate repeated transmissions is configured by radio resource control signaling, or is predefined by the transmitting receiving node and the terminal.

In an embodiment, the repeated transmission information includes a repeated transmission pattern and the number of repeated transmissions; or, the repeated transmission information includes a repeated transmission pattern, and the number of repeated transmissions is configured by radio resource control signaling.

In an embodiment, the repeated transmission information includes the number of repeated transmissions; in the case that the transmission receiving node schedules the terminal uplink transmission to a single user multiple input multiple output, the repeated transmission information passes through the downlink control information. The antenna port domain indication.

In an embodiment, when the number of spatial multiplexing layers of the physical uplink shared channel or the physical uplink control channel is 1, the demodulation reference signal port defaults to port 0; in the space of the physical uplink shared channel or the physical uplink control channel When the number of multiplexing layers is 2, the demodulation reference signal ports are port 0 and port 1 by default.

In an embodiment, the repeated transmission information includes the number of repeated transmissions and the demodulation reference signal port; the number of repeated transmissions and the demodulation reference signal port are jointly indicated by the antenna port field in the downlink control information.

In the data transmission device of this embodiment, by receiving downlink control information, multiple indication fields in the downlink control information can indicate repeated transmission of information. The repeated transmission information can be changed according to channel changes and dynamically indicated to the terminal through DCI, TRP and terminal Data transmission is carried out in accordance with the repetitive transmission information that is dynamically indicated, so that the repetitive transmission method is more flexible, thereby improving resource utilization and transmission efficiency.

The embodiment of the present application also provides a data transmission receiving node. The data transmission method may be executed by a transmission device, which may be implemented by software and/or hardware, and integrated in the data transmission receiving node.

FIG. 6 is a schematic structural diagram of a data transmission receiving node provided by an embodiment. As shown in FIG. 6, a data transmission receiving node provided in this embodiment includes a processor 510 and a storage device 520. There may be one or more processors in the data transmission receiving node. FIG. 6 takes one processor 510 as an example. The processor 510 and the storage device 520 in the device may be connected by a bus or other methods. In FIG. 6 Take the bus connection as an example.

The one or more programs are executed by the one or more processors 510, so that the one or more processors implement the data transmission method described in any one of the foregoing embodiments.

The storage device 520 in the data transmission receiving node is used as a computer-readable storage medium and can be used to store one or more programs. The programs can be software programs, computer-executable programs, and modules. The program instructions/modules corresponding to the method (for example, the modules in the data transmission device shown in FIG. 4 include: a sending module 310 and a first transmission module 320). The processor 510 executes various functional applications and data processing of the data transmission receiving node by running the software programs, instructions, and modules stored in the storage device 520, that is, realizing the data transmission method in the foregoing method embodiment.

The storage device 520 mainly includes a storage program area and a storage data area. The storage program area can store an operating system and an application program required by at least one function; the storage data area can store data created according to the use of the device, etc. (as in the above implementation) In the example, repeated transmission information, downlink control information, etc.). In addition, the storage device 520 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices. In some examples, the storage device 520 may include memories remotely provided with respect to the processor 510, and these remote memories may be connected to the data transmission receiving node through a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

Moreover, when one or more programs included in the aforementioned data transmission receiving node are executed by the one or more processors 510, the following operations are implemented: sending downlink control information, where the downlink control information is used to indicate the repetition of the physical channel Transmit information; perform data transmission with the terminal according to the repeated transmission information.

The data transmission receiving node proposed in this embodiment belongs to the same concept as the data transmission method proposed in the above embodiment. For technical details not described in detail in this embodiment, please refer to any of the above embodiments, and this embodiment has the same transmission method as the execution method. Effect.

The embodiment of the present application also provides a terminal. The data transmission method may be executed by a transmission device, which may be implemented in software and/or hardware, and integrated in the terminal.

FIG. 7 is a schematic structural diagram of a terminal provided by an embodiment. As shown in FIG. 7, a terminal provided in this embodiment includes: a processor 610 and a storage device 620. There may be one or more processors in the terminal. In FIG. 7, one processor 610 is taken as an example. The processor 610 and the storage device 620 in the device may be connected by a bus or other means. Connect as an example.

The one or more programs are executed by the one or more processors 610, so that the one or more processors implement the data transmission method described in any of the foregoing embodiments.

The storage device 620 in the terminal is used as a computer-readable storage medium and can be used to store one or more programs. The programs can be software programs, computer-executable programs, and modules, such as those corresponding to the transmission method in the embodiment of the present application. Program instructions/modules (for example, the modules in the data transmission device shown in FIG. 5 include: a receiving module 410 and a second transmission module 420). The processor 610 executes various functional applications and data processing of the terminal by running software programs, instructions, and modules stored in the storage device 620, that is, implements the data transmission method in the foregoing method embodiment.

The storage device 620 mainly includes a storage program area and a storage data area. The storage program area can store an operating system and an application program required by at least one function; the storage data area can store data created according to the use of the device, etc. (as in the above implementation) In the example, repeated transmission information, downlink control information, etc.). In addition, the storage device 620 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices. In some examples, the storage device 620 may include a memory remotely provided with respect to the processor 610, and these remote memories may be connected to the terminal through a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

Moreover, when one or more programs included in the foregoing terminal are executed by the one or more processors 610, the following operations are implemented: receiving downlink control information, where the downlink control information is used to indicate repeated transmission information of a physical channel; Perform data transmission with the transmission receiving node according to the repeated transmission information.

The terminal proposed in this embodiment belongs to the same concept as the data transmission method proposed in the foregoing embodiment. For technical details not described in detail in this embodiment, refer to any of the foregoing embodiments, and this embodiment has the same effect as executing the transmission method.

The embodiment of the present application also provides a storage medium containing computer-executable instructions. The computer-executable instructions are used to execute a data transmission method when executed by a computer processor.

Based on the above description of the implementation manners, this application can be implemented by software and general-purpose hardware, and can also be implemented by hardware. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), Random Access Memory (RAM), flash memory (FLASH), hard disk or optical disk, etc., including multiple instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute any of this application The method described in the embodiment.

The above are only exemplary embodiments of the present application, and are not used to limit the protection scope of the present application.

The block diagram of any logic flow in the drawings of the present application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program can be stored on the memory. The memory can be of any type suitable for the local technical environment and can be implemented using any suitable data storage technology, such as but not limited to read only memory (ROM), random access memory (RAM), optical storage devices and systems (digital multi-function optical discs) (Digital Video Disc, DVD) or CD (Compact Disk,)), etc. Computer-readable media may include non-transitory storage media. The data processor can be any type suitable for the local technical environment, such as but not limited to general-purpose computers, special-purpose computers, microprocessors, digital signal processors (Digital Signal Processing, DSP), application specific integrated circuits (ASICs) ), programmable logic devices (Field-Programmable Gate Array, FPGA), and processors based on multi-core processor architecture.

Claims (33)

A data transmission method, including: Sending downlink control information, where the downlink control information is used to indicate repeated transmission information of the physical channel; Perform data transmission with the terminal according to the repeated transmission information. The method according to claim 1, wherein the repeated transmission information includes the number of repeated transmissions and a sounding reference signal resource index, and the number of repeated transmissions is a non-negative integer; The number of repeated transmissions and the sounding reference signal resource index are jointly indicated by the sounding reference signal resource indication field of the downlink control information. The method according to claim 2, wherein, in the case that the physical channel is a physical uplink shared channel, the repeated transmission information further includes indication information for early termination of repetition. The method according to claim 2, wherein, in a case where there are at least two sounding reference signal resources, the repeated transmission information indicates that the same spatial transmission filter as that of transmitting each sounding reference signal resource is used for the set number of times in sequence Or half of the set number of repeated transmissions. The method according to claim 1, wherein the repeated transmission of information includes sending a configuration indication status; The repeated transmission information is indicated by the sending configuration indication field of the downlink control information; The sending configuration indication status includes at least one of the following information: the number of repeated transmissions, the sounding reference signal resource index, the channel state information reference signal resource index, and the synchronization signal block index. The method according to claim 5, wherein the transmission configuration indication state is one of the candidate transmission configuration indication states configured by higher layer radio resource control signaling; The number of bits indicating the transmission configuration indication state is determined according to the number of transmission configuration indication states configured by the high-level radio resource control signaling. The method according to claim 5, wherein the sending configuration indication state is one of the candidate sending configuration indication states activated by medium access control unit signaling; The number of bits indicating the transmission configuration indication state is determined according to the number of transmission configuration indication states activated by the media access control unit signaling. The method according to claim 1, wherein the repeated transmission information includes the number of repeated transmissions, and the number of repeated transmissions is one of the number of candidate repeated transmissions configured by higher layer signaling, or is a candidate repeated with the terminal predefined One of the number of transmissions; The repeated transmission information is indicated by a newly added indication field in the downlink control information, and the newly added indication field is 2 bits or 3 bits. The method according to claim 1, wherein the repeated transmission information includes the number of repeated transmissions; In the case that the physical channel is a physical uplink shared channel, the resource allocation type 1, physical uplink shared channel non-frequency hopping transmission, and the defined dynamic repetitive transmission enable parameter value is 1 and the upper layer uses resource allocation type 1. In the case that the parameter includes 4 offset values, the repeated transmission information is indicated by the high-order bits of the set number of frequency domain resource allocation fields in the downlink control information, and the frequency domain resource allocation field is divided by the set number of high-order bits. The remaining bits other than a certain number of high-order bits are set to indicate frequency domain resource allocation; Wherein, the total number of bits in the frequency domain resource allocation domain is determined according to the number of resource blocks occupied by the user bandwidth part. The method according to claim 9, wherein the number of repeated transmissions is one of the number of candidate repeated transmissions, and the number of candidate repeated transmissions is configured by radio resource control signaling, or is predefined by a transmitting receiving node and a terminal. The method according to claim 1, wherein the repeated transmission information includes a repeated transmission pattern and the number of repeated transmissions; or, The repeated transmission information includes a repeated transmission pattern, and the number of repeated transmissions is configured by radio resource control signaling. The method according to claim 1, wherein the repeated transmission information includes the number of repeated transmissions; In the case where the scheduling mode of the transmitting and receiving node for the terminal's uplink transmission is single-user multiple input multiple output, the repeated transmission information is indicated by the antenna port field in the downlink control information. The method according to claim 12, wherein, when the number of spatial multiplexing layers of the physical uplink shared channel or the physical uplink control channel is 1, the demodulation reference signal port is port 0 by default; When the number of spatial multiplexing layers of the physical uplink shared channel or the physical uplink control channel is 2, the demodulation reference signal ports are port 0 and port 1 by default. The method according to claim 1, wherein the repeated transmission information includes the number of repeated transmissions and a demodulation reference signal port; The number of repeated transmissions and the demodulation reference signal port are jointly indicated by the antenna port field in the downlink control information. A data transmission method, including: Receiving downlink control information, where the downlink control information is used to indicate repeated transmission information of a physical channel; Perform data transmission with the transmission receiving node according to the repeated transmission information. The method according to claim 15, wherein the repeated transmission information includes the number of repeated transmissions and a sounding reference signal resource index, and the number of repeated transmissions is a non-negative integer; The number of repeated transmissions and the sounding reference signal resource index are jointly indicated by the sounding reference signal resource indication field of the downlink control information. The method according to claim 16, wherein, in the case that the physical channel is a physical uplink shared channel, the repeated transmission information further includes indication information for early termination of repetition. The method according to claim 16, wherein, in a case where there are at least two sounding reference signal resources, the repeated transmission information indicates that the same spatial transmission filter used for transmitting each sounding reference signal resource is used for the set number of times in sequence Or half of the set number of repeated transmissions. The method according to claim 15, wherein the repeated transmission of information includes sending a configuration indication status; The repeated transmission information is indicated by the sending configuration indication field of the downlink control information; The sending configuration indication status includes at least one of the following information: the number of repeated transmissions, the sounding reference signal resource index, the channel state information reference signal resource index, and the synchronization signal block index. The method according to claim 19, wherein the transmission configuration indication state is one of the candidate transmission configuration indication states configured by higher layer radio resource control signaling; The number of bits indicating the transmission configuration indication state is determined according to the number of transmission configuration indication states configured by the high-level radio resource control signaling. The method according to claim 19, wherein the sending configuration indication state is one of the candidate sending configuration indication states activated by medium access control unit signaling; The number of bits indicating the transmission configuration indication state is determined according to the number of transmission configuration indication states activated by the media access control unit signaling. The method according to claim 15, wherein the repeated transmission information includes the number of repeated transmissions, and the number of repeated transmissions is one of the number of candidate repeated transmissions configured by higher layer signaling, or is a candidate repeated with the terminal predefined One of the number of transmissions; The repeated transmission information is indicated by a newly added indication field in the downlink control information, and the newly added indication field is 2 bits or 3 bits. The method according to claim 15, wherein the repeated transmission information includes the number of repeated transmissions; In the case that the physical channel is a physical uplink shared channel, the resource allocation type 1, physical uplink shared channel non-frequency hopping transmission, and the defined dynamic repeated transmission enable parameter value is 1 and the upper layer uses resource allocation type 1. In the case where the parameter includes 4 offset values, the repeated transmission information is indicated by the high-order bits of the set number of frequency domain resource allocation fields in the downlink control information, and the frequency domain resource allocation field excludes the set The remaining bits other than a certain number of high-order bits are set to indicate frequency domain resource allocation; Wherein, the total number of bits in the frequency domain resource allocation domain is determined according to the number of resource blocks occupied by the user bandwidth part. The method according to claim 23, wherein the number of repeated transmissions is one of the number of candidate repeated transmissions, and the number of candidate repeated transmissions is configured by radio resource control signaling, or is predefined by a transmitting receiving node and a terminal. The method according to claim 15, wherein the repeated transmission information includes a repeated transmission pattern and the number of repeated transmissions; or, The repeated transmission information includes a repeated transmission pattern, and the number of repeated transmissions is configured by radio resource control signaling. The method according to claim 15, wherein the repeated transmission information includes the number of repeated transmissions; In the case where the scheduling mode of the transmitting and receiving node for the terminal's uplink transmission is single-user multiple input multiple output, the repeated transmission information is indicated by the antenna port field in the downlink control information. The method according to claim 26, wherein, when the number of spatial multiplexing layers of the physical uplink shared channel or the physical uplink control channel is 1, the demodulation reference signal port is port 0 by default; When the number of spatial multiplexing layers of the physical uplink shared channel or the physical uplink control channel is 2, the demodulation reference signal ports are port 0 and port 1 by default. The method according to claim 15, wherein the repeated transmission information includes the number of repeated transmissions and a demodulation reference signal port; The number of repeated transmissions and the demodulation reference signal port are jointly indicated by the antenna port field in the downlink control information. A data transmission device includes: A sending module, configured to send downlink control information, where the downlink control information is used to indicate repeated transmission information of the physical channel; The first transmission module is configured to perform data transmission with the terminal according to the repeated transmission information. A data transmission device includes: A receiving module, configured to receive downlink control information, where the downlink control information is used to indicate repeated transmission information of a physical channel; The second transmission module is configured to perform data transmission with the transmission receiving node according to the repeated transmission information. A data transmission receiving node includes: At least one processor; The storage device is set to store at least one program; When the at least one program is executed by the at least one processor, the at least one processor implements the data transmission method according to any one of claims 1-14. A terminal including: At least one processor; The storage device is set to store at least one program; When the at least one program is executed by the at least one processor, the at least one processor implements the data transmission method according to any one of claims 15-28. A computer-readable storage medium storing a computer program, wherein the program is executed by a processor to implement the data transmission method according to any one of claims 1-28.

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