Scheduling method and device based on URLLC uplink repeated transmission function

Abstract

The present invention relates to the field of resource scheduling technology, and in particular to a scheduling method and device based on URLLC uplink repeated transmission function. The method includes: for each new uplink transmission scheduling, the following are executed: after allocating time-frequency domain air interface resources and idle HARQ resources to the terminal of the current new transmission using the UL DCI of the base station, the time-frequency domain air interface resources are saved to the HARQ process, and the state of the HARQ process is set to a repeated state; the terminal sends repeated uplink data to the base station multiple times based on a preset number of repetitions; the base station determines whether to release the HARQ process and time-frequency domain air interface resources for rescheduling based on whether the previous repeated uplink data is parsed successfully. In this solution, after the base station successfully parses the repeated uplink data, the corresponding resources can be released. Compared with the traditional method, it can improve resource utilization and reduce transmission delay while ensuring data reliability.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of resource scheduling, and in particular to a scheduling method and device based on URLLC uplink repeated transmission function. Background Art

[0002] The three major application scenarios of 5G technology are mMTC (Internet of Things), eMBB (ultra-high-definition streaming media services), and URLLC (Ultra-Reliable and Low-Latency Communications). In order to meet the needs of ultra-low latency and high reliability application scenarios (such as URLLC), 5G technology introduces pusch repetition, that is, a repeated transmission mechanism.

[0003] Pusch repetition sends the same uplink data multiple times within a transmission time interval (TTI). The receiving end can improve the probability of receiving the correct transmission data by comparing and combining multiple repeated uplink data. Therefore, increasing the number of repetitions can further enhance the reliability of data and reduce delays such as retransmission caused by transmission errors. However, more repetitions will occupy more wireless resources and increase the transmission time, thereby increasing the transmission delay.

[0004] Therefore, in order to balance the relationship between reliability and resource utilization efficiency, a scheduling method is urgently needed to improve the resource utilization efficiency of URLLC uplink repeated transmission and reduce latency. Summary of the invention

[0005] In order to solve the problem that the existing uplink repeated transmission mechanism occupies more wireless resources and increases the transmission time, thereby increasing the transmission delay, an embodiment of the present invention provides a scheduling method and device based on the URLLC uplink repeated transmission function.

[0006] In a first aspect, an embodiment of the present invention provides a scheduling based on a URLLC uplink repetitive transmission function, including:

[0007] For each new uplink transmission scheduling, the following operations are performed:

[0008] After allocating time-frequency domain air interface resources and idle HARQ resources to the terminal of the current new transmission by using the UL DCI of the base station, the time-frequency domain air interface resources are saved to the HARQ process, and the state of the HARQ process is set to a repeated state;

[0009] The terminal sends repeated uplink data to the base station multiple times based on the UL DCI data of the HARQ process and a preset number of repetitions;

[0010] The base station determines whether to release the HARQ process and the time-frequency domain air interface resources based on whether the previous repeated uplink data is parsed successfully, so as to provide for the UL DCI rescheduling.

[0011] In a second aspect, an embodiment of the present invention further provides a scheduling device based on a URLLC uplink repetitive transmission function based on the method described in any embodiment of this specification, the device comprising:

[0012] The scheduling unit is configured to perform, for each new uplink transmission scheduling, the following steps: after allocating time-frequency domain air interface resources and idle HARQ resources to the terminal of the current new transmission by using the UL DCI of the base station, saving the time-frequency domain air interface resources to the HARQ process, and setting the state of the HARQ process to a repeated state;

[0013] A sending unit, arranged in the terminal, configured to send repeated uplink data to the base station multiple times based on the UL DCI data of the HARQ process and a preset number of repetitions;

[0014] A release unit is arranged in the base station, and is used to determine whether to release the HARQ process and the time-frequency domain air interface resources based on whether the previous repeated uplink data is parsed successfully, so as to provide for the UL DCI rescheduling.

[0015] In a third aspect, an embodiment of the present invention further provides a computing device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the method described in any embodiment of this specification is implemented.

[0016] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed in a computer, enables the computer to execute the method described in any embodiment of this specification.

[0017] The embodiment of the present invention provides a scheduling method and device based on the URLLC uplink retransmission function. After the base station successfully parses the repeated uplink data, the corresponding HARQ process and time-frequency domain air interface resources can be released for UL DCI rescheduling. Compared with the traditional method in which the corresponding resources are released only after the number of received repeated uplink data reaches the configured number of repetitions, this method can improve resource utilization and reduce transmission delay while ensuring data reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a flow chart of a scheduling method based on URLLC uplink repeated transmission function provided by one embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of uplink scheduling of a conventional uplink repeated transmission scheduling method;

[0021] Figure 3 It is a schematic diagram of upload scheduling of a scheduling method based on URLLC uplink repeated transmission function provided by an embodiment of the present invention;

[0022] Figure 4 is a hardware architecture diagram of a computing device provided by an embodiment of the present invention;

[0023] Figure 5 This is a structural diagram of a scheduling device based on the URLLC uplink repeated transmission function provided by one embodiment of the present invention. DETAILED DESCRIPTION

[0024] 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 are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] As mentioned above, traditional pusch repetition is to send the same uplink data multiple times within a transmission time interval (TTI). The receiving end can improve the probability of receiving the correct transmission data by comparing and merging multiple repeated uplink data. For example, the base station is the receiving end, and the number of repetitions of sending the same uplink data is set to 8. Then, after the terminal sends the same uplink data 8 times in sequence, the base station considers that the repetition transmission task is completed and releases the corresponding resources. While repeating 8 times can certainly further enhance the reliability of data, it will result in continued reception even when the correct uplink data has been received, increasing unnecessary resource occupancy and transmission delay.

[0026] In order to solve the above technical problems, the inventors considered optimizing the processing timing of pusch repetition transmission. After the base station successfully parses the repeated uplink data, the corresponding HARQ process and time-frequency domain air interface resources can be directly released without waiting until the last repeated uplink data is received. This improves resource utilization and reduces latency while complying with the requirements of the 3GPP protocol standard.

[0027] The specific implementation of the above concept is described below.

[0028] Please refer to Figure 1 The embodiment of the present invention provides a scheduling method based on the URLLC uplink repetitive transmission function, the method comprising:

[0029] Step 100, for each new uplink transmission scheduling, execute:

[0030] After allocating time-frequency domain air interface resources and idle HARQ resources to the terminal of the current new transmission using the UL DCI of the base station, the time-frequency domain air interface resources are saved to the HARQ process, and the state of the HARQ process is set to a repeated state;

[0031] Step 102, the terminal sends repeated uplink data to the base station multiple times based on the UL DCI data of the HARQ process and a preset number of repetitions;

[0032] Step 104: The base station determines whether to release the HARQ process and time-frequency domain air interface resources based on whether the previous repeated uplink data is parsed successfully, so as to facilitate UL DCI rescheduling.

[0033] In an embodiment of the present invention, after the base station successfully parses the repeated uplink data, the corresponding HARQ process and time-frequency domain air interface resources can be released for UL DCI rescheduling. Compared with the traditional method in which the corresponding resources are released only after the number of received repeated uplink data reaches the configured number of repetitions, this method can improve resource utilization and reduce transmission delay while ensuring data reliability.

[0034] For step 100:

[0035] In some implementations, before the new uplink transmission scheduling, the method further includes:

[0036] After each terminal successfully accesses the base station, it reports to the base station whether it supports the repeated transmission function;

[0037] The base station sends a signaling carrying configuration parameters to the terminals supporting the repeated transmission function through a wireless interface, so that each terminal performs configuration according to the configuration parameters; the configuration parameters at least include the number of repetitions.

[0038] In this embodiment, each terminal needs to establish a connection with the base station in advance, and needs to report to the base station whether it supports the pusch repetition function. It can be understood that the embodiment of the present invention is only for the 5G URLLC uplink scenario of the terminal that supports the pusch repetition function. Then, the terminal that supports the repetition function will perform repetition configuration according to the signaling of the base station. It can be understood that the terminal will be pre-configured with the number of repetitions of the pusch repetition function, that is, the number of repeated transmissions of the same uplink data.

[0039] Each time a new uplink transmission is scheduled, it is necessary to first use the UL DCI uplink authorization unit of the base station to allocate time-frequency domain air interface resources and idle HARQ (Hybrid Automatic Repeat Request) resources to the terminal that is currently transmitting, and then save the time-frequency domain air interface resources to the HARQ process, and set the state of the HARQ process to a repeat state.

[0040] It should be noted that, for a HARQ process in a repeated state, the subsequent uplink data of the corresponding terminal is scheduled using the HARQ process and the corresponding time-frequency domain air interface resources, and does not need to be rescheduled using UL DCI.

[0041] Regarding step 102:

[0042] In some implementations, step 102 may include:

[0043] Get the ID and repetition count of the configured HARQ process;

[0044] Sending repeated uplink data to the base station based on the UL DCI data of the HARQ process;

[0045] Determine whether the current repeated uplink data reaches the repetition number;

[0046] If it is reached, stop sending the next repeated uplink data;

[0047] If not reached, it is determined whether the UL DCI rescheduling data corresponding to the HARQ process ID is received. If received, the sending of the next repeated uplink data is stopped; if not received, the sending of the next repeated uplink data is continued.

[0048] In this embodiment, it can be understood that UL DCI data is scheduling information data of the terminal, including the sending time of the terminal uplink data, etc. When the base station successfully parses a repeated uplink data and releases the HARQ process and the time-frequency domain air interface resources, the UL DCI rescheduling data at this time will also be sent to the terminal, indicating that the terminal does not need to continue to send repeated uplink data, and the current pusch repetition transmission task is completed. If the UL DCI rescheduling data has not been received, the terminal will send repeated uplink data according to the set number of repetitions. If the number of repetitions is 8, the terminal will send 8 repeated uplink data and end the current pusch repetition transmission task.

[0049] Regarding step 104:

[0050] In some implementations, step 104 may include:

[0051] The base station receives the first repeated uplink data sent by the terminal, and determines whether the first repeated uplink data is parsed successfully;

[0052] If successful, the state of the HARQ process is modified to release the HARQ process and time-frequency domain air interface resources for UL DCI rescheduling;

[0053] If not, continue to receive the second repeated uplink data until at least one repeated uplink data is parsed successfully or the last repeated uplink data is received, and then modify the state of the HARQ process to release the HARQ process and time-frequency domain air interface resources for UL DCI rescheduling.

[0054] In the embodiment of the present invention, the processing priority of the base station in time slot processing is that repeated transmission is preferred over retransmission, and retransmission is preferred over new uplink transmission.

[0055] For example, Figure 2 This is a schematic diagram of the traditional pusch repetition scheduling. Figure 3 The scheduling diagram of the uplink repetition transmission scheduling method of the embodiment of the present invention is shown in the following test conditions: FDD mode, SCS = 30KHz, repetition number repetition_num = 8. Taking a wireless frame as an example, assuming that a wireless frame has 20 slots (time slots), the repeated uplink data Ut that is not successfully parsed is marked with a shadow, and the parsed data is unshaded. Figure 2In the traditional method, the base station receives 8 identical repeated uplink data of the first repeated transmission task in slots 2-9, and all of them are parsed successfully. After completing the first repeated transmission task, slot 10 performs UL DCI rescheduling, and receives 8 identical repeated uplink data of the second repeated transmission task in slots 11-18. Among them, the repeated uplink data U1 and U5 of slots 11 and 15 are not parsed successfully. It can be seen that Figure 2 The traditional method requires eight repetitions regardless of whether the analysis result is correct or not. The uplink data is reported only after the repetition number reaches eight, which undoubtedly increases the transmission delay.

[0056] and Figure 3 In the figure, 2slot and 3slot are the first repetitive transmission task. After the parsing error of the repetitive uplink data U1 in 2slot, the repetitive uplink data U2 is received in 3slot, and the parsing is successful, completing the first repetitive transmission task. The DCI for the second repetitive transmission task is rescheduled in 5slot. After the parsing errors of U1 and U2, the repetitive uplink data U3 is received in 8slot, and the parsing is successful, completing the second repetitive transmission task. The DCI for the third repetitive transmission task is rescheduled in 10slot. After the parsing error of U1, the repetitive uplink data U2 is received in 12slot, and the parsing is successful, completing the third repetitive transmission task. It can be seen that under the same configuration, the uplink repetitive transmission scheduling method of the embodiment of the present invention can release the corresponding resources after receiving the correct uplink data, and can improve the utilization of resources and reduce transmission delay while ensuring data reliability.

[0057] like Figure 4 , Figure 5 As shown, an embodiment of the present invention provides a scheduling device based on the URLLC uplink repetitive transmission function. The device embodiment can be implemented by software, or by hardware or a combination of software and hardware. From the hardware level, Figure 4 As shown, a hardware architecture diagram of a computing device where a scheduling device based on a URLLC uplink repetitive transmission function is provided in an embodiment of the present invention is located, except Figure 4 In addition to the processor, memory, network interface, and non-volatile memory shown in the figure, the computing device in which the device is located in the embodiment may also generally include other hardware, such as a forwarding chip responsible for processing messages, etc. Taking software implementation as an example, Figure 5 As shown, as a device in a logical sense, the CPU of the computing device in which it is located reads the corresponding computer program in the non-volatile memory into the memory and runs it. This embodiment provides a scheduling device based on the URLLC uplink repetitive transmission function, and the device includes:

[0058] The scheduling unit 501 is configured to perform, for each new uplink transmission scheduling, the following steps: after allocating time-frequency domain air interface resources and idle HARQ resources to the terminal of the current new transmission using the UL DCI of the base station, saving the time-frequency domain air interface resources to the HARQ process, and setting the state of the HARQ process to a repeat state;

[0059] A sending unit 502, arranged in the terminal, is used to send repeated uplink data to the base station multiple times based on the UL DCI data of the HARQ process and a preset number of repetitions;

[0060] The release unit 503 is arranged in the base station, and is used to determine whether to release the HARQ process and the time-frequency domain air interface resources based on whether the previous repeated uplink data is parsed successfully, so as to facilitate UL DCI rescheduling.

[0061] In one embodiment of the present invention, the sending unit 502 is used to execute:

[0062] Get the ID and repetition count of the configured HARQ process;

[0063] Sending repeated uplink data to the base station based on the UL DCI data of the HARQ process;

[0064] Determine whether the current repeated uplink data reaches the repetition number;

[0065] If it is reached, stop sending the next repeated uplink data;

[0066] If not reached, it is determined whether the UL DCI rescheduling data corresponding to the HARQ process ID is received. If received, the sending of the next repeated uplink data is stopped; if not received, the sending of the next repeated uplink data is continued.

[0067] In one embodiment of the present invention, the release unit 503 is used to execute:

[0068] The base station receives the first repeated uplink data sent by the terminal, and determines whether the first repeated uplink data is parsed successfully;

[0069] If successful, the state of the HARQ process is modified to release the HARQ process and time-frequency domain air interface resources for UL DCI rescheduling;

[0070] If not, continue to receive the second repeated uplink data until at least one repeated uplink data is parsed successfully or the last repeated uplink data is received, and then modify the state of the HARQ process to release the HARQ process and time-frequency domain air interface resources for UL DCI rescheduling.

[0071] In one embodiment of the present invention, before executing new uplink transmission scheduling, the scheduling unit 501 is further configured to:

[0072] After each terminal successfully accesses the base station, it reports to the base station whether it supports the repeated transmission function;

[0073] The base station sends a signaling carrying configuration parameters to the terminals supporting the repeated transmission function through a wireless interface, so that each terminal performs configuration according to the configuration parameters; the configuration parameters at least include the number of repetitions.

[0074] In one embodiment of the present invention, the processing priority of the base station in time slot processing is that repeated transmission takes precedence over retransmission, and retransmission takes precedence over new uplink transmission.

[0075] It is understandable that the structure illustrated in the embodiment of the present invention does not constitute a specific limitation on a scheduling device based on the URLLC uplink repeated transmission function. In other embodiments of the present invention, a scheduling device based on the URLLC uplink repeated transmission function may include more or fewer components than shown in the figure, or combine certain components, or split certain components, or arrange the components differently. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0076] The information interaction, execution process and other contents between the modules in the above-mentioned device are based on the same concept as the embodiment of the method of the present invention. For the specific contents, please refer to the description in the embodiment of the method of the present invention, and no further description is given here.

[0077] An embodiment of the present invention also provides a computing device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, a scheduling method based on the URLLC uplink retransmission function in any embodiment of the present invention is implemented.

[0078] An embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the processor executes a scheduling method based on the URLLC uplink retransmission function in any embodiment of the present invention.

[0079] Specifically, a system or device equipped with a storage medium can be provided, on which software program code that implements the functions of any of the above-mentioned embodiments is stored, and a computer (or CPU or MPU) of the system or device can be enabled to read and execute the program code stored in the storage medium.

[0080] In this case, the program code itself read from the storage medium can realize the function of any one of the above-mentioned embodiments, and thus the program code and the storage medium storing the program code constitute a part of the present invention.

[0081] The storage medium embodiments for providing the program code include a floppy disk, a hard disk, a magneto-optical disk, an optical disk (such as CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), a magnetic tape, a non-volatile memory card, and a ROM. Alternatively, the program code can be downloaded from a server computer by a communication network.

[0082] In addition, it should be clear that the functions of any of the above embodiments can be implemented not only by executing the program code read by the computer, but also by enabling an operating system operating on the computer to complete part or all of the actual operations based on instructions from the program code.

[0083] In addition, it can be understood that the program code read from the storage medium is written to a memory provided in an expansion board inserted into the computer or to a memory provided in an expansion module connected to the computer, and then based on the instructions of the program code, a CPU installed on the expansion board or expansion module is enabled to perform part or all of the actual operations, thereby realizing the functions of any of the above-mentioned embodiments.

[0084] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0085] A person of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk, etc., various media that can store program codes.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A scheduling method based on URLLC uplink repetitive transmission function, characterized in that: include: For each new uplink transmission scheduling, the following operations are performed: After allocating time-frequency domain air interface resources and idle HARQ resources to the terminal of the current new transmission by using the UL DCI of the base station, the time-frequency domain air interface resources are saved to the HARQ process, and the state of the HARQ process is set to a repeated state; wherein the terminal supports a pusch repetition repeated transmission function; The terminal sends repeated uplink data to the base station multiple times based on the UL DCI data of the HARQ process and a preset number of repetitions; The base station determines, based on whether the previous repeated uplink data is parsed successfully, whether to release the HARQ process and the time-frequency domain air interface resources for rescheduling of the UL DCI; The base station determines, based on whether the last repeated uplink data is parsed successfully, whether to release the HARQ process and the time-frequency domain air interface resources for rescheduling the UL DCI, including: The base station receives the first repeated uplink data sent by the terminal, and determines whether the first repeated uplink data is parsed successfully; If successful, modifying the state of the HARQ process to release the HARQ process and the time-frequency domain air interface resources for rescheduling of the UL DCI; If not, continue to receive the second repeated uplink data until at least one repeated uplink data is parsed successfully or the last repeated uplink data is received, and then perform the modification of the state of the HARQ process to release the HARQ process and the time-frequency domain air interface resources for the UL DCI rescheduling; The processing priority of the base station in time slot processing is that repeated transmission is preferred over retransmission, and retransmission is preferred over new uplink transmission.

2. The method according to claim 1, characterized in that: The terminal sends repeated uplink data to the base station multiple times based on the UL DCI data of the HARQ process and a preset number of repetitions, including: Obtaining the configured ID and number of repetitions of the HARQ process; Sending repeated uplink data to the base station based on the UL DCI data of the HARQ process; Determine whether the current number of repeated uplink data reaches the number of repetitions; If it is reached, stop sending the next repeated uplink data; If not reached, it is determined whether the UL DCI rescheduling data corresponding to the HARQ process ID is received. If received, the sending of the next repeated uplink data is stopped; if not received, the sending of the next repeated uplink data is continued.

3. The method according to claim 1, characterized in that Before the new uplink transmission scheduling, it also includes: After each terminal successfully accesses the base station, it reports to the base station whether it supports the repeated transmission function; The base station sends a signaling carrying configuration parameters to the terminal supporting the repeated transmission function through a wireless interface, so that each terminal performs configuration according to the configuration parameters; the configuration parameters at least include the number of repetitions.

4. A scheduling device based on URLLC uplink repetitive transmission function based on the method according to any one of claims 1 to 3, characterized in that: include: The scheduling unit is configured to perform, for each new uplink transmission scheduling, the following steps: after allocating time-frequency domain air interface resources and idle HARQ resources to the terminal of the current new transmission by using the UL DCI of the base station, saving the time-frequency domain air interface resources to the HARQ process, and setting the state of the HARQ process to a repeated state; A sending unit, arranged in the terminal, configured to send repeated uplink data to the base station multiple times based on the UL DCI data of the HARQ process and a preset number of repetitions; A release unit is arranged in the base station, and is used to determine whether to release the HARQ process and the time-frequency domain air interface resources based on whether the previous repeated uplink data is parsed successfully, so as to provide for the UL DCI rescheduling.

5. A computing device, comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the method according to any one of claims 1 to 3 is implemented.

6. A computer-readable storage medium having a computer program stored thereon, which, when executed in a computer, causes the computer to execute the method according to any one of claims 1 to 3.

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