WO2023185353A1

WO2023185353A1 - Data transmission method, electronic device, and storage medium

Info

Publication number: WO2023185353A1
Application number: PCT/CN2023/078563
Authority: WO
Inventors: 刘宏俊; 王东; 杨光
Original assignee: 阿里巴巴达摩院(杭州)科技有限公司
Priority date: 2022-03-28
Filing date: 2023-02-27
Publication date: 2023-10-05
Also published as: CN114499773A; CN114499773B

Abstract

Embodiments of the present invention provide a data transmission method, an electronic device, and a storage medium. The method comprises: when a first downlink time slot is reached, a base station can send, to a terminal device by means of a physical downlink channel, data to be issued; if said data is a first control instruction, the terminal device can send a data packet corresponding to a sending identifier in the first control instruction and send the data packet to the base station, wherein the sending identifier is used for reflecting whether the data packet is re-sent; and if said data is a data packet, the terminal device receives the data packet sent by the base station, and feeds back a parse result of the data packet to the base station by means of a physical uplink control channel. In the process, the base station sends, by means of the physical downlink channel, the data to be issued, such that the data packet uploaded by the terminal device can be controlled, and when the terminal device is not upgraded, the terminal device can have a function of repeatedly sending the data packet.

Description

Data transmission methods, electronic devices and storage media

This application claims priority to the Chinese patent application submitted to the China Patent Office on March 28, 2022, with the application number 202210312256.0 and the application name "Data transmission method, electronic device and storage medium", the entire content of which is incorporated herein by reference. Applying.

Technical field

The present invention relates to the field of communication technology, and in particular, to a data transmission method, electronic equipment and storage medium.

Background technique

In the scenario of the fifth generation mobile communication technology (5G), for data packet transmission between terminal equipment and base stations, data packet parsing may fail due to air interface interference, transmission attenuation and other reasons. In practice, the parsing success rate of data packets can be improved by repeatedly transmitting data packets.

An achievable repeated transmission method can be: the base station can use the new communication protocol specified in 3GPP to send control instructions including the number of times and retransmission cycles of data packets through the Physical Downlink Control Channel (PDCCH) Sent to the terminal device, if the terminal device also supports this new communication protocol, the repeated sending of the data packet can be achieved through parsing control instructions to ensure the parsing success rate of the data packet.

However, in practice, terminal equipment often does not support the above-mentioned new communication protocols for repeated transmission of data packets. In this case, the terminal equipment cannot implement data packet retransmission, and the success rate of data packet parsing cannot be guaranteed. Therefore, how to realize repeated transmission of data packets without upgrading the terminal equipment has become an urgent problem to be solved.

Contents of the invention

In view of this, embodiments of the present invention provide a data transmission method, electronic device and storage medium, so as to enable the terminal device to have the function of repeatedly sending data packets without upgrading the terminal device.

In a first aspect, an embodiment of the present invention provides a data transmission method, which is applied to a base station, including:

When the first downlink time slot is reached, the data to be delivered is sent to the terminal device through the physical downlink channel;

If the data to be sent is a first control instruction that includes a sending identifier, receive a data packet corresponding to the sending identifier sent by the terminal device, and the sending identifier reflects whether to resend the data packet;

If the data to be sent is a data packet, receive the data packet parsing result sent by the terminal device through the physical uplink control channel.

In a second aspect, embodiments of the present invention provide an electronic device, including a processor and a memory, the memory being used to store one or more computer instructions, wherein when the one or more computer instructions are executed by the processor Implement the data transmission method in the above first aspect. The electronic device may also include a communication interface for communicating with other devices or communication networks.

In a third aspect, embodiments of the present invention provide a non-transitory machine-readable storage medium. The non-transitory machine-readable storage medium stores executable code. When the executable code is processed by a processor of an electronic device, When executed, the processor can at least implement the data transmission method described in the first aspect.

According to the data transmission method provided by the embodiment of the present invention, when the first downlink time slot is reached, the base station can use the physical downlink channel to send the data to be delivered to the terminal device. If the data to be sent is the first control instruction, the terminal device can determine the data packet corresponding to the identification according to the transmission identification in the first control instruction and send it to the base station. Among them, the sending identifier is used to reflect whether the data packet is retransmitted. If the data to be sent is a data packet, the terminal device receives the data packet sent by the base station, and sends the analysis result of the data packet to the base station through the physical uplink control channel. It can be seen that in the above process, the base station sends the data to be delivered to the terminal device through the physical downlink channel, so that the terminal device sends a data packet or an analysis result to the base station in response to the data to be delivered. That is to say, the base station can control the upload of data packets by the terminal device with the help of the physical downlink channel, and enable the terminal device to have the function of repeatedly sending data packets without upgrading the terminal device.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic flow chart of a data transmission method provided by an embodiment of the present invention;

Figure 2 is a schematic flow chart of another data transmission method provided by an embodiment of the present invention;

Figure 3a is a schematic flow chart of another data transmission method provided by an embodiment of the present invention;

Figure 3b is a schematic diagram of data transmission provided by an embodiment of the present invention;

Figure 3c is a schematic diagram of another data transmission provided by an embodiment of the present invention;

Figure 4a is a schematic flow chart of another data transmission method provided by an embodiment of the present invention;

Figure 4b is a schematic diagram of another data transmission provided by an embodiment of the present invention;

Figure 4c is a schematic diagram of another data transmission provided by an embodiment of the present invention;

Figure 5a is a schematic flow chart of another data transmission method provided by an embodiment of the present invention;

Figure 5b is a schematic diagram of another data transmission provided by an embodiment of the present invention;

Figure 5c is a schematic diagram of another data transmission provided by an embodiment of the present invention;

Figure 6 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

The terminology used in the embodiments of the present invention is only for the purpose of describing specific embodiments and is not intended to limit the present invention. As used in this embodiment and the appended claims, the singular forms "a," "the" and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. Generally, at least two are included, but at least one is not excluded.

It should be understood that the term "and/or" used in this article is only an association relationship describing related objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, and A and A exist simultaneously. B, there are three situations of B alone. In addition, the character "/" in this article generally indicates that the related objects are an "or" relationship.

Depending on the context, the words "if" or "if" as used herein may be interpreted as "when" or "when" or "in response to a determination" or "in response to an identification." Similarly, depending on the context, the phrase "if determined" or "if (stated condition or event) is identified" may be interpreted as "when determined" or "in response to determination" or "when (stated condition or event) is identified )" or "in response to identifying (a stated condition or event)."

It should also be noted that the terms "includes", "includes" or any other variation thereof are intended to cover a non-exclusive inclusion, such that a good or system including a list of elements includes not only those elements but also those not expressly listed other elements, or elements inherent to the product or system. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of other identical elements in the goods or systems that include the stated element.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments and features in the embodiments may be combined with each other as long as there is no conflict between the embodiments. In addition, the sequence of steps in the following method embodiments is only an example and is not strictly limited.

Before describing the various embodiments provided by the present invention, the following explanations may also be made:

When data is transmitted at the physical layer, the smallest transmission unit can be called a time slot, and multiple time slots can constitute a frame structure. Among them, any frame structure can be composed of uplink time slots, downlink time slots and special time slots. The terminal device can upload data to the base station in the uplink time slot to achieve uplink data transmission, and can also parse the data sent by the base station in the downlink time slot. The base station can deliver data to the terminal device in downlink time slots and special time slots to achieve downlink data transmission, and can also parse the data sent by the terminal device in the uplink time slot.

Among them, the number and arrangement order of various time slots included in a frame can be set according to requirements. For example, the uplink time slot in a frame can be represented as U, the downlink time slot can be represented as D, and the special time slot can be represented as S. Then a frame structure can be represented as DDSUU, DDDSU, etc. Among them, the special time slot S in the frame can also be used as a downlink time slot.

Based on the above description, FIG. 1 is a schematic flowchart of a data transmission method provided by an embodiment of the present invention. The data transmission method provided by an embodiment of the present invention can be executed by a base station connected to a terminal device. This method reflects the process of upstream transmission of data. As shown in Figure 1, the method includes the following steps:

S101. When reaching the first downlink time slot, send the data to be delivered to the terminal device through the physical downlink channel.

When reaching the first downlink time slot in the target frame, the base station can send the data to be delivered to the terminal device through the physical downlink channel. The first downlink time slot may be any downlink time slot in the target frame. According to the above description, from the perspective of the terminal device, the data interaction between the terminal device and the base station may include uplink data transmission and downlink data transmission. Then, when uplink data transmission is performed, the data to be transmitted sent by the base station is the first control instruction; when downlink data transmission is performed, the data to be transmitted sent by the base station is a data packet.

Optionally, the physical downlink channel may specifically include a physical downlink control channel (Physical Downlink Control Channel, PDCCH for short) and a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH for short). Then the base station can send the first control instruction through the PDCCH and the data packet through the PDSCH.

S102. If the data to be sent is the first control instruction including the sending identifier, receive the data packet corresponding to the sending identifier sent by the terminal device, and the sending identifier reflects whether to resend the data packet.

When the data to be sent is a first control instruction, the first control instruction may include a sending identifier that reflects whether to resend the data packet. The transmission identifier in the first control instruction may be the first transmission or the retransmission.

If the transmission identifier is the first transmission, it indicates that the latest historical data packet received by the base station has been parsed successfully when the first downlink time slot is reached. The terminal device responds to this first control instruction and uses the Physical Uplink Share Channel (Physical Uplink Share). Channel (PUSCH for short) sends the data packet corresponding to the sending identifier, that is, the new data packet, that is, the data packet to be uploaded to the base station. If the transmission identifier is a retransmission, it indicates that the latest historical data packet received by the base station has not been parsed successfully when the first downlink time slot is reached. The terminal device responds to this first control instruction and sends the data corresponding to the transmission identifier by means of PUSCH. The data packet is the historical data packet to the base station. Optionally, the sending identifier may be an NDI (New Data Indicator) value. When the sending flag is repeated sending, the value does not flip; when the sending flag is first sending, the value flips.

For the transmission of data packets, optionally, the terminal device can use the physical resource module (Physical Resource Block, referred to as PRB) pre-allocated by the base station. The specific allocation process of PRB may be that the base station responds to the access request sent by the terminal device and controls the terminal device to access the base station. With the help of PDCCH, each terminal equipment accessing the base station is allocated at least one PRB. Wherein, the above access request is generated when the terminal device accesses the base station for the first time.

S103. If the data to be sent is a data packet, receive the parsing result of the data packet sent by the terminal device through the physical uplink control channel.

When the data to be sent is a data packet, the terminal device can directly receive and parse the data packet, and the parsing result of the data packet can be fed back to the base station through the Physical Uplink Control Channel (PUCCH). When the terminal device receives the data packet in the first downlink time slot, the terminal device can parse the data packet in the first downlink time slot or a downlink time slot after the first downlink time slot, and analyze the data packet at this certain downlink time slot. The analysis result is sent to the base station in an uplink time slot after the downlink time slot.

After receiving the parsing result fed back by the terminal device, the base station can determine the transmission identifier based on the parsing result and generate a control instruction. However, it should be noted that step S102 and step S103 are two independent situations. Therefore, the analysis result in step S103 is not the basis for generating the transmission identifier in step S102.

In this embodiment, when arriving at the first downlink time slot, the base station can send the data to be delivered to the terminal device through the physical downlink channel. If the data to be sent is the first control instruction, the terminal device can determine the data packet corresponding to the identification according to the transmission identification in the first control instruction and send it to the base station. Among them, the sending identifier is used to reflect whether the data packet is retransmitted. If the data to be sent is a data packet, the terminal device receives the data packet sent by the base station, and sends the analysis result of the data packet to the base station through the physical uplink control channel. It can be seen that in the above process, the base station sends the data to be delivered to the terminal device through the physical downlink channel, so that the terminal device sends a data packet or an analysis result to the base station in response to the data to be delivered. That is to say, the base station can control the upload of data packets by the terminal device with the help of the physical downlink channel, and enable the terminal device to have the function of repeatedly sending data packets without upgrading the terminal device.

Optionally, in addition to the transmission identifier, the first control instruction sent by the base station may also include the first preset number. This first preset number is used to inform the terminal device of the sending timing of the data packet.

Specifically, when arriving at the first downlink time slot, the base station sends a first control instruction including a first preset number and a transmission identifier to the terminal device. After receiving the first control instruction, the terminal device may send the data packet corresponding to the sending identifier in the first uplink time slot. Wherein, the first uplink time slot is after the first downlink time slot, and there is a first preset number of time slots spaced between them. Optionally, the first uplink time slot and the first downlink time slot may be in the same or different frame structures.

The embodiment shown in Figure 1 describes that after the base station sends a control instruction or data packet in a downlink time slot, the terminal device can feed back corresponding data to the base station to realize uplink and downlink transmission of data. In practice, the base station may also send control instructions to the terminal device in multiple downlink time slots, so that the terminal device performs uplink and downlink transmission of data.

When the terminal equipment performs uplink data transmission, the base station can determine the transmission identifier based on its own analysis of the data packet when arriving at different downlink time slots, and send the first control including the transmission identification to the terminal equipment through the PDCCH in different downlink time slots. Instruction to enable the terminal device to send multiple data packets in response to this control instruction. When multiple data packets are the same, repeated sending of data packets is achieved, and the terminal device has the ability to repeatedly send data packets through the control of the base station.

Optionally, when the above-mentioned plurality of downlink time slots are adjacent first downlink time slots and second downlink time slots, and the first downlink time slot is earlier than the second downlink time slot, Figure 2 is a diagram of the present invention. The embodiment provides a schematic flow chart of another data transmission method. This method reflects the process of upstream transmission of data. As shown in Figure 2, the method includes the following steps:

S201: When arriving at the first downlink time slot, determine a first transmission identifier that reflects whether to retransmit the first historical data packet based on the analysis result of the first historical data packet recently received by the base station.

S202. In the first downlink time slot, send the first control instruction including the first sending identifier to the terminal device via the physical downlink channel.

The base station can parse the latest first historical data packet currently received and obtain the parsing result. When arriving at the first downlink time slot, the base station may determine the first transmission identifier based on the currently obtained analysis result. and sending the first control instruction including the first sending identifier to the terminal device via the physical downlink channel in the first downlink time slot. The first historical data packet may be uploaded by the terminal device before the first downlink time slot and in an uplink time slot adjacent to the first downlink time slot. The physical downlink channel for sending the first control instruction is specifically the PDCCH.

Regarding the method of determining the first sending identifier, when the first historical data packet is parsed successfully, it indicates that the first historical data packet has been uploaded successfully, and then it is determined that the first sending identifier is the first sending, indicating that the terminal device does not need to re-upload the first historical data packet. data package, instead a new data package needs to be uploaded. When the parsing of the first historical data packet fails, it indicates that the upload of the first historical data packet fails, and the first sending identifier is determined to be repeated transmission, indicating that the terminal device needs to resend the first historical data.

S203: When arriving at the second downlink time slot adjacent to the first downlink time slot, determine whether to retransmit the second historical data packet according to the analysis result of the second historical data packet latest received by the base station. logo.

S204. In arriving at the second downlink time slot, send the second control instruction including the second sending identifier to the terminal device via the physical downlink channel.

Similar to step S201, when arriving at the second downlink time slot adjacent to the first downlink time slot, the base station can also determine the second transmission identifier based on the analysis result of the latest second historical data packet that has been received at this time. . And when the second downlink time slot is reached, the second control instruction including the second transmission identifier is sent to the terminal equipment via the PDCCH.

Optionally, according to different frame structures, the first downlink time slot and the second downlink time slot may be in the same frame, and there is no interval time slot between them. The first downlink time slot and the second downlink time slot may also be in different frames, that is, there may be at least one uplink time slot between the two downlink time slots.

S205: Receive the data packet corresponding to the first sending identifier uploaded by the terminal device in the first uplink time slot.

In response to the first control instruction, the terminal device may send corresponding data to the base station in the first uplink time slot. Specifically, when the first uplink time slot is reached, if the terminal device has generated valid data that needs to be uploaded, the data packet containing the valid data can be sent to the base station. If the terminal device has not generated a data packet that needs to be uploaded, it can send a data packet containing a padding identifier to the base station, where the padding identifier indicates that the terminal device has no valid data locally. It should be noted that the data packets sent by the terminal devices mentioned in this embodiment and the following embodiments are all data packets containing valid data.

Based on the above description, the terminal device can send the data packet corresponding to the first sending identifier in the first uplink time slot, that is, the terminal device determines whether to send the data packet to be uploaded or resend it in the first uplink time slot according to the first sending identifier. Send historical packets. And the data packet sent by the terminal device in response to the first control instruction can be received by the base station in a downlink time slot after the first downlink time slot. Optionally, a first preset number of time slots may be spaced between the first uplink time slot and the first downlink time slot, and the first preset number may be represented by a K2 value. This K2 is also included in the first control command.

S206: Receive the data packet corresponding to the second sending identifier uploaded by the terminal device in the second uplink time slot adjacent to the first uplink time slot.

Similarly, the base station may also receive the data packet corresponding to the second transmission identifier sent by the terminal device in the second uplink time slot. Optionally, the second control instruction may also include a K2 value, and this value may be the same as or different from that in step S205. Depending on the number and arrangement order of various time slots in the frame structure, the adjacent first uplink time slot and the second uplink time slot may be located in the same or different frames.

According to the above method, the base station can control the terminal device to realize the duplication of data packets by sending different control instructions. Sent even if the end device has packet repeating capability.

In this embodiment, when the first downlink time slot is reached, the base station can determine the first transmission identifier that reflects whether to resend the first historical data packet based on the analysis result of the latest first historical data packet received at this time. When the adjacent second downlink time slot is reached, the second transmission identifier reflecting whether to retransmit the second historical data packet can be determined based on the analysis result of the latest received second historical data packet at this time. Afterwards, the base station will respectively send a first control instruction including a first transmission identifier in the first downlink time slot, and a second control instruction including a second transmission identifier in the second downlink time slot, so that the terminal equipment can respond accordingly. In the uplink time slot, data packets are sent according to different sending identifiers, that is, data uploading is realized. Of course, depending on the difference between the first sending identifier and the second sending identifier, the sending of the data packet may include repeated sending of the same data packet.

It can be seen that in the above process, the base station can control the timing and which data packet to upload by the terminal device by sending control instructions to the terminal device in different downlink time slots. That is, without upgrading the terminal device, The base station can enable the terminal device to have the function of repeatedly sending data packets by sending control instructions to the terminal device multiple times in different downlink time slots. The base station can then analyze the data packets sent repeatedly by the terminal device, which can also improve the success rate of parsing the data packets.

Based on the above embodiment, optionally, the number of times of sending the data packet can also be set. Therefore, the number of times of repeated sending of the data packet can also be considered when determining the sending identifier. If the number of times the data packet is repeatedly sent does not exceed the preset number, the sending identifier can be determined based on the parsing results. If the number of repeated transmissions of the data packet has reached the preset number of times, the repeated transmission is stopped and the terminal device is controlled to send a new data packet.

In the above embodiment, it is mentioned that two downlink time slots are adjacent, and two uplink time slots are also adjacent. Optionally, the above-mentioned two downlink time slots and two uplink time slots can be in the same target frame, and the two downlink time slots are two consecutive downlink time slots in this target frame, that is, there is no inclusion between them. For other time slots, the two uplink time slots can also be two consecutive uplink time slots in this target frame, that is, there are no other time slots between them. And since there are no other time slots between the two downlink time slots, the latest historical data packets received by the base station in the first downlink time slot and the second downlink time slot are the same, that is, the implementation shown in Figure 2 The first historical data packet and the second historical data packet in the example are the same.

Optionally, a frame structure that satisfies the above-described relationship between uplink and downlink time slots may be DDSUU, and for clarity of description, the frame structure may be transformed into D1D2SU1U2. At this time, the first downlink time slot is D2, the second downlink time slot is S, the first uplink time slot is U1, and the second uplink time slot is U2.

When the terminal device generates valid data in a downlink time slot (S or D1) before the first downlink time slot D2 in the target frame, the base station can use two consecutive uplink time slots in the target frame. (U1 and U2) receive the data packet sent by the terminal device. At this time, the base station can analyze the historical data packet results and obtain the corresponding first sending identification and the second sending identification, and further controlling the terminal device according to the identification to implement repeated uploading of data packets.

Specifically, FIG. 3a is a schematic flowchart of yet another data transmission method provided by an embodiment of the present invention. This method can also be performed by the base station. As shown in Figure 3a, the method may include the following steps:

S301. When arriving at the first downlink time slot, if the latest first historical data packet received by the base station is parsed successfully, the first transmission identifier is determined to be the first transmission.

S302. In the first downlink time slot, send the first control instruction including the first sending identifier to the terminal device via the physical downlink channel.

S303: When arriving at the second downlink time slot adjacent to the first downlink time slot, if the latest second historical data packet received by the base station is parsed successfully, the second transmission flag is determined to be repeated transmission.

S304. In the second downlink time slot, send the second control instruction including the second sending identifier to the terminal device via the physical downlink channel.

S305: Receive the data packet to be uploaded for the first time sent by the terminal device in the first uplink time slot.

S306: Receive the data packet to be uploaded repeatedly sent by the terminal device in the second uplink time slot adjacent to the first uplink time slot.

When reaching the first downlink time slot D2, if the base station has successfully parsed the first historical data packet, it determines that the first transmission identifier is the first transmission, indicating that the terminal device needs to send a new data packet. In the first downlink time slot D2, the base station may also send the first control instruction including the first transmission identifier to the terminal equipment via the PDCCH. K2=2 in the first control instruction, the NDI value is reversed. Since the terminal device has already generated a new data packet in the downlink time slot D1 or S, the terminal device can respond to the first uplink control instruction and send the new data packet when it reaches the first uplink time slot U1. Upload the data package.

Since there is no gap between the first downlink time slot D2 and the second downlink time slot S, when the second downlink time slot S is reached, the latest second historical data packet received by the base station is the above-mentioned first Historical data packets, and the base station has successfully parsed them. At this time, it can be determined that the second sending identifier is resend, indicating that the terminal device needs to resend the data packet. In the second downlink time slot S, the base station may send the second uplink control instruction including the second transmission identifier to the terminal equipment via the PDCCH. K2=2 in the second uplink control command, the NDI value is not inverted. In response to this second control instruction, the terminal device repeatedly sends the data packet to be uploaded that was sent in the first uplink time slot U1 when it reaches the second uplink time slot U2.

The above process means that if the terminal device generates data to be uploaded in a downlink time slot before the first uplink time slot U1, and there can be multiple consecutive uplink time slots for transmitting the data to be uploaded, the base station The above scheduling method can be used so that the terminal device can repeatedly send the data packet to be uploaded in two consecutive uplink time slots U1 and U2.

In addition, after the base station repeatedly sends the first data packet to be uploaded in two consecutive uplink time slots, it can also analyze it together. Optionally, parsing of both packets can be performed by the same process on the base station. The specific parsing process may be: merging the first data packets to be uploaded respectively sent in the two uplink time slots according to preset parameters, and parsing the combined results, thereby improving the parsing rate of the first data packets to be uploaded. It should be noted that the above merger is actually a soft merger. The content in this embodiment can also be understood in conjunction with Figure 3b.

In this embodiment, the two downlink time slots in the target frame are continuous, and the two uplink time slots in the target frame are continuous. When the base station successfully parses the historical data packets, the base station can send control signals in the two downlink time slots respectively. Instruction to control the terminal device to repeatedly send the same data packet to be uploaded in two consecutive uplink time slots. The base station analyzes the same data packets sent continuously through soft merging to obtain the parsing success rate of the data packets.

Similar to the embodiment shown in Figure 3a, the two downlink time slots mentioned above are two consecutive downlink time slots in the target frame, and the two uplink time slots mentioned above are also consecutive uplink time slots in the target frame. , and the terminal device generates and uploads the first historical data packet before the first downlink time slot D2 in the target frame. Based on this situation, the base station can also obtain the corresponding first sending identifier and the second sending identifier based on the parsing results of historical data packets, and further control the terminal device to implement repeated uploading of data packets based on the identifiers.

When the first downlink time slot D2 is reached, if the base station parses the first historical data packet as a parsing failure, it determines that the first transmission identifier is repeated transmission. And send the first control instruction including the first sending identifier to the terminal device in the first downlink time slot D2. K2=2 in the first control instruction, the NDI value is not inverted. Then, when the second downlink time slot S is reached, the base station's parsing result for the second historical data packet (i.e., the first historical data packet) is still a parsing failure. At this time, it is determined that the second transmission flag is repeated transmission, and the second historical data packet is sent in the second historical data packet. The second control instruction including the second transmission identifier is sent to the terminal device in the downlink time slot S. K2=2 in the second control instruction, the NDI value is not inverted. The terminal device may respond to the first control instruction to repeatedly send the first historical data packet to the base station according to the first sending identifier when the first uplink time slot U1 is reached. Since there is no downlink time slot between the first uplink time slot U1 and the second uplink time slot U2, the base station cannot parse the first historical data packet sent by the first uplink time slot U1. Therefore, when arriving at the second uplink time slot U2 , the terminal device will also repeatedly send the first historical data packet to the base station.

The above process means that if the terminal equipment generates data to be uploaded in a downlink time slot before the first uplink time slot U1, then the base station will follow the above scheduling method and the terminal equipment can upload data in two consecutive uplink time slots U1 and U2. The first historical data packet is sent repeatedly. And after the base station obtains the first historical data packet repeatedly sent in two consecutive uplink time slots in the target frame, it can also analyze it. For the specific parsing process, please refer to the relevant description in the embodiment shown in Figure 3a, and will not be described again here. The content in this embodiment can also be understood in conjunction with Figure 3c.

And the data packet to be uploaded generated by the terminal device before the first downlink time slot D2 can be uploaded after the base station successfully parses the first historical data packet.

In this embodiment, the two downlink time slots in the target frame are consecutive, and the two uplink time slots in the target frame are also consecutive. When the base station fails to parse the historical data packets, the base station can respectively Send a control instruction to control the terminal device to repeatedly send the same historical data packet in two consecutive uplink time slots. The base station analyzes the same data packets sent continuously through soft merging to obtain the parsing success rate of the data packets.

Based on the above embodiments shown in Figure 3a to Figure 3c, when the terminal equipment has generated valid data that can be uploaded before two consecutive uplink time slots (U1 and U2), the base station can enable the terminal through the scheduling of uplink control instructions. The device repeatedly uploads the same data packet in two consecutive uplink time slots (U1 and U2). At this time, the base station can combine the received data packets using soft merging and analyze them, thereby improving the success rate of data packet analysis. .

It should be noted that scheduling by the base station in accordance with the above-mentioned embodiment shown in Figures 3a to 3c can enable the terminal equipment to implement repeated transmission of data packets in consecutive uplink time slots. That is, the terminal device can receive the control instructions sent by the base station to realize the retransmission of the data packet, and the repeatedly sent data packet can also be sent to the base station in a short time, while ensuring the success rate of data packet parsing, it can also ensure that the data The packet delay meets the preset requirements. Among them, the preset requirements are related to user needs.

Compared with the above method, when using the Hybrid Automatic Repeat ReQuest (HARQ) mechanism for data packet retransmission, the base station controls whether the terminal device sends the data packet repeatedly based on the terminal device's analysis of the data packet. As a result, the base station can control the terminal device to resend the data packet after receiving the parsing failure or parsing success message sent by the terminal device. However, it takes a period of time for the terminal device to parse the data packets and send the analysis results to the base station. This also causes a certain period of time between repeated data packets, which makes the delay of the data packets too long and does not meet the preset requirements.

Optionally, the two downlink time slots in the embodiment shown in Figure 2 can also be adjacent downlink time slots in different frames, that is, there is an uplink time slot between the two downlink time slots, and at the same time, the first uplink time slot and The second uplink time slot may also be an adjacent uplink time slot in a different frame, that is, there is a downlink time slot between the two uplink time slots. In this case, the latest historical data packets received by the base station in the first downlink time slot and the second downlink time slot are different, that is, the first historical data packet and the second historical data packet are different.

Continuing to undertake the above-mentioned DDSUU frame structure, when there are two frames, for the sake of clarity of description, the frame structure can be transformed into D1D2SU1U2D3D4S2U3U4. At this time, the first downlink time slot is S1, the second downlink time slot is D3, the first uplink time slot is U2, and the second uplink time slot is U3.

When the terminal device generates valid data, that is, data packets to be uploaded, in an uplink time slot (such as U1), the base station cannot receive multiple consecutive data packets in the same frame, that is, the base station can only Receive a data packet uploaded by the terminal device. At this time, the base station can also obtain the corresponding first sending identifier and the second sending identifier based on the parsing results of historical data packets, and further control the terminal device to implement repeated uploading of data packets based on the sending identifiers.

Specifically, FIG. 4a is a schematic flowchart of yet another data transmission method provided by an embodiment of the present invention. The method may include the following steps:

S401: When arriving at the first downlink time slot, if the first historical data packet is parsed successfully, determine that the first transmission identifier is the first transmission.

S403. In the first downlink time slot, send the first control instruction including the first sending identifier through the physical downlink channel.

S403: When arriving at the second downlink time slot adjacent to the first downlink time slot, if parsing of the second historical data packet fails, determine that the second transmission flag is repeated transmission.

S404: In the second downlink time slot, send the second control instruction including the second sending identifier through the physical downlink channel.

S405: Receive the data packet to be uploaded for the first time sent by the terminal device in the first uplink time slot.

S406: Receive the data packet to be uploaded repeatedly sent by the terminal device in the second uplink time slot.

When arriving at the first downlink time slot S1, if the base station has successfully parsed the first historical data packet, it determines that the first transmission identifier is the first transmission, indicating that the terminal device needs to send a new data packet. In the first downlink time slot S1, the base station may also send a first control instruction including a first transmission identifier to the terminal device. In the first uplink control instruction, K2=2, and the NDI value is inverted. The terminal device responds to this first control instruction and sends a new data packet when it reaches the first uplink time slot U2, that is, the data packet to be uploaded to the base station.

Since the first downlink time slot S1 and the second downlink time slot D3 are in different frames, that is, there is an uplink time slot between them, therefore, when the second downlink time slot D3 is reached, the base station receives the latest second history The data packet is actually the data packet to be uploaded by the terminal device in the first uplink time slot U2.

When the second downlink time slot D3 is reached, in one case, if the second historical data packet parsing fails, the second sending identifier is determined to be resending, indicating that the terminal device needs to resend the last sent data packet to be uploaded. Then in the second downlink time slot D3, the base station may also send a second control instruction including the second transmission identifier to the terminal device. In the second control instruction, K2=3, the NDI value is not inverted. In response to this second control instruction, the terminal device resends the data packet to be uploaded when it reaches the second uplink time slot U3. The above process can be understood in conjunction with Figure 4b.

In another case, if the second historical data packet is parsed successfully, the second sending identifier is determined to be the first sending, indicating that the terminal device needs to send a new data packet. The base station may also send a second control instruction including the first sending identifier to the terminal device. In the second control instruction, K2=3, the NDI value is reversed. Terminal device response When this second control instruction arrives at the second uplink time slot U3, if the terminal device has generated a new data packet at this time, that is, another data packet to be uploaded, the other data packet will be transmitted to the base station. The above process can be understood in conjunction with Figure 4c.

In this embodiment, when the terminal device generates data to be uploaded, one frame structure does not contain two consecutive uplink time slots. For example, when the uplink time slot U1 generates data to be uploaded, the base station cannot obtain multiple consecutive uplink time slots in the same frame. For data packets sent in uplink time slots, according to the above scheduling method, the terminal device can repeatedly send data packets to be uploaded in uplink time slots located in different frames. The base station analyzes the same data packet sent continuously to obtain the parsing success rate of the data packet.

Based on the embodiments of Figures 3a to 4c, depending on the frame structure, when valid data is generated, the base station cannot cause the terminal device to repeatedly upload the same data packet in multiple consecutive uplink time slots in the same frame through the scheduling of the uplink control instructions. At this time, the base station can also obtain data packets that are repeatedly sent in different uplink time slots through scheduling, and use soft merging to combine multiple data packets for analysis, thereby improving the success rate of data packet analysis.

The above embodiments describe the uplink transmission process of data. When downlink transmission of data occurs, for the scheduling process of the base station to the terminal equipment, Figure 5a is a schematic flow chart of another data transmission method provided by an embodiment of the present invention. This method can be performed by the base station. The method may include the following steps:

S501: When reaching the first downlink time slot, send the data to be delivered to the terminal device through the physical downlink channel.

S502. If the data to be sent is a data packet and includes a second preset number of third control instructions, receive the analysis result of the data packet sent by the terminal device in the third uplink time slot, the third uplink time slot and the first downlink time slot. Row slots are spaced apart by a second preset number of slots.

The base station has locally processed the data packet that is the data to be sent, and can directly send it to the terminal device when the first downlink time slot is reached. For the convenience of subsequent description, the data packet that is the data to be delivered can be called the data packet to be delivered. The sending of the data packet to be delivered may be implemented specifically by means of PDSCH. At the same time, in this first downlink time slot, a third control instruction can also be sent. The second preset number included in the third control instruction is used to control the timing at which the terminal device sends the data packet parsing result. This second preset quantity may be expressed as a K1 value.

Specifically, the terminal device analyzes the data packet sent by the base station after receiving it in the first downlink time slot, and can send the analysis result of the data packet to the base station when it reaches the third uplink time slot. Wherein, the third uplink time slot is after the first downlink time slot, and there is a second preset number of time slots spaced between them.

In this embodiment, through the scheduling of the base station, the base station can also send data packets to the terminal device and receive the analysis results of the data packets within the prescribed time slot.

Based on the embodiment shown in Figure 5a, the base station may also have a data packet retransmission function. Alternatively, the base station may determine whether to reflect the target number of downlink time slots that include the first downlink time slot in the target frame and are continuously adjacent to the first downlink time slot. Repeatedly send the third sending identifier of the data packet to be sent. Among them, continuous adjacency can be understood as follows: If the target frame includes multiple downlink time slots, and any two downlink time slots do not include uplink time slots and special time slots, then these multiple downlink time slots are consecutively adjacent. neighboring. Assume that the structure of the target frame is the above-mentioned D1D2SU1U2, and the first downlink time slot is D1, then the downlink time slots D1 and D2 are consecutively adjacent, and the target number is 2. When the second downlink time slot adjacent to the first downlink time slot is reached, the data packet corresponding to the third transmission identifier is sent to the terminal device. The first downlink time slot and the second downlink time slot may be located in the same or different frames.

Optionally, for the determination process of the third transmission identifier, the frame structure of D1D2SU1U2 is inherited. In one case, in this target frame, the first downlink time slot is D2, and if the first downlink time slot D2 is included in within , and the target number of consecutive downlink time slots adjacent to this first downlink time slot D2 is greater than 1, indicating that the base station can send data packets in multiple consecutive downlink time slots (i.e., D2 and S), then the first downlink time slot D2 is determined. The third transmission is marked as retransmission, and the data packet to be delivered is repeatedly transmitted in the second downlink time slot. This situation can be understood in conjunction with Figure 5b.

In another case, in the target frame, if the target number of downlink time slots including the first downlink time slot and consecutively adjacent to the first downlink time slot is equal to 1, it means that in the target frame, If the base station can send the data packet to be delivered in a downlink time slot (i.e., S), the base station can determine the third transmission identifier based on whether the terminal device obtains the analysis result of the data packet to be delivered.

Specifically, if the target number is 1 and the analysis result of the data packet to be sent by the terminal device can be obtained when the second downlink time slot is reached, at this time, it indicates that the processing capability of the terminal device is high or the first downlink time slot and If there are more uplink time slots between the second downlink time slots, it is determined that the third transmission identifier is the first transmission, and the base station can send a new data packet, that is, another data to be sent, to the terminal device in the second downlink time slot. Bag. If the target number is 1 and the analysis result of the data packet to be delivered by the terminal device is not obtained in the second downlink time slot, it is determined that the third transmission identifier is a retransmission, and the base station retransmits the data packet to the terminal device in the second downlink time slot. Send the data packet to be delivered. This situation can be understood in conjunction with Figure 5c.

In this embodiment, through the scheduling of the base station, the terminal device can receive repeatedly sent data packets. The terminal device can also use soft merging to merge them and then parse them together, which should be able to improve the terminal device's parsing of data packets. success rate.

In a possible design, the above data transmission method can be applied in an electronic device. As shown in FIG. 6 , the electronic device can include: a processor 21 and a memory 22 . Wherein, the memory 22 is used to store and support the electronic The device executes the program of the data transmission method provided in the embodiment shown in FIG. 1 to FIG. 5 c , and the processor 21 is configured to execute the program stored in the memory 22 .

The program includes one or more computer instructions, wherein when the one or more computer instructions are executed by the processor 21, the following steps can be implemented:

If the data to be sent is a data packet, receive an analysis result of the data packet sent by the base station sent by the terminal device through the physical uplink control channel.

Optionally, the processor 21 is also configured to execute all or part of the steps in the aforementioned embodiments shown in Figures 1 to 5c.

Wherein, the structure of the electronic device may also include a communication interface 23 for the electronic device to communicate with other devices or communication networks.

In addition, an embodiment of the present invention provides a computer storage medium for storing computer software instructions used by the above-mentioned electronic equipment, which includes programs involved in executing the data transmission method in the above-mentioned method embodiments shown in Figures 1 to 5c. .

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be used Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent substitutions are made to some of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

A data transmission method, characterized in that it is applied to a base station and includes:

When the first downlink time slot is reached, the data to be delivered is sent to the terminal device through the physical downlink channel;

If the data to be sent is a first control instruction that includes a sending identifier, receive a data packet corresponding to the sending identifier sent by the terminal device, and the sending identifier reflects whether to resend the data packet;

If the data to be sent is a data packet, receive the data packet parsing result sent by the terminal device through the physical uplink control channel.
The method according to claim 1, characterized in that the physical downlink channel includes a physical downlink control channel and a physical downlink shared channel;

The sending of data to be delivered via a physical downlink channel includes:

Send the first control instruction via the physical downlink control channel;

Data packets are sent via the physical downlink shared channel.
The method according to claim 1, characterized in that said receiving the data packet corresponding to the sending identifier sent by the terminal device includes:

If the sending identifier is the first transmission, then receive the data packet to be uploaded sent by the terminal device via the physical uplink shared channel; if the sending identifier is retransmission, then receive the data packet to be uploaded by the terminal device via the physical uplink shared channel. The historical data packet sent is the latest data packet received by the base station in the first downlink time slot.
The method according to claim 1, characterized in that the first control instruction includes a first preset number;

The receiving the data packet corresponding to the sending identifier sent by the terminal device includes:

Receive a data packet corresponding to the transmission identifier sent by the terminal device in a first uplink time slot, where the first uplink time slot and the first downlink time slot are separated by the first preset number of times. gap.
The method according to claim 4, characterized in that, when the first downlink time slot is reached, sending data to be delivered to the terminal device through a physical downlink channel includes:

When the first downlink time slot is reached, determine a first transmission identifier that reflects whether to retransmit the first historical data packet according to the analysis result of the first historical data packet recently received by the base station;

In the first downlink time slot, send a first control instruction including the first sending identifier to the terminal device via the physical downlink channel;

When arriving at the second downlink time slot adjacent to the first downlink time slot, according to the second latest received by the base station The analysis result of the historical data packet determines whether to retransmit the second sending identifier of the second historical data packet; in the arrival of the second downlink time slot, the physical downlink channel is used to send the second sending identifier including the second sending identifier. The second control command is sent to the terminal device;

The receiving the data packet corresponding to the sending identifier sent by the terminal device in the first uplink time slot includes:

Receive the data packet corresponding to the first sending identifier uploaded by the terminal device in the first uplink time slot;

Receive a data packet corresponding to the second sending identifier uploaded by the terminal device in a second uplink time slot adjacent to the first uplink time slot.
The method according to claim 5, characterized in that the first downlink time slot and the second downlink time slot are consecutive downlink time slots in the target frame, and the first uplink time slot and the third downlink time slot are The second uplink time slot is a continuous uplink time slot in the target frame, and the first historical data packet and the second historical data packet are the same;

Determining a first transmission identifier reflecting whether to resend the first historical data packet based on the analysis result of the first historical data packet latest received by the base station includes:

If the first historical data packet is parsed successfully, it is determined that the first transmission identifier is the first transmission;

Determining a second sending identifier reflecting whether to resend the second historical data packet based on the parsing result of the second historical data packet latest received by the base station includes:

If the second historical data packet is parsed successfully, it is determined that the second sending identifier is repeated sending;

The receiving the terminal device to upload the data packet corresponding to the first sending identifier in the first uplink time slot includes:

Receive the data packet to be uploaded for the first time sent by the terminal device in the first uplink time slot;

The receiving the terminal device to upload the data packet corresponding to the second sending identifier in the second uplink time slot adjacent to the first uplink time slot includes:

Receive the data packet to be uploaded repeatedly sent by the terminal device in the second uplink time slot.
The method of claim 6, further comprising:

Merge the data packets to be uploaded sent by the terminal device in the first uplink time slot and the second uplink time slot according to preset parameters;

Parse the merged result.
The method according to claim 1, characterized in that if the data to be sent is a data packet, receiving the data packet parsing result sent by the terminal device through the physical uplink control channel includes:

If the data to be sent is a data packet and includes a second preset number of third control instructions, receive the parsing result sent by the terminal device in the third uplink time slot, the third uplink time slot and the The first downlink time slot interval is described in A second preset number of time slots.
The method of claim 8, further comprising:

Determine a third transmission that reflects whether to retransmit the data packet according to the target number of downlink time slots in the target frame including the first downlink time slot that are continuously adjacent to the first downlink time slot. logo;

When arriving at the second downlink time slot adjacent to the first downlink time slot, a data packet corresponding to the third transmission identifier is sent.
The method of claim 2, further comprising:

In response to the access request sent by the terminal device, control the terminal device to access the base station;

With the help of the physical downlink control channel, the terminal device is allocated a physical resource module for sending data packets.
An electronic device, characterized in that it includes: a memory and a processor; wherein executable code is stored on the memory, and when the executable code is executed by the processor, the processor is caused to execute as claimed The data transmission method according to any one of claims 1 to 10.
A non-transitory machine-readable storage medium, characterized in that executable code is stored on the non-transitory machine-readable storage medium. When the executable code is executed by a processor of an electronic device, the The processor executes the data transmission method according to any one of claims 1 to 10.