Scheduling-free transmission method and system, storage medium and terminal

Abstract

The present invention provides a scheduling-free transmission method and system, a storage medium and a terminal, which set a selection threshold of a scheduling-free transmission extension mode; when performing scheduling-free transmission, the scheduling-free transmission extension mode is selected based on the selection threshold; a data packet is transmitted to a base station based on the scheduling-free transmission extension mode, and feedback information sent by the base station is received. The scheduling-free transmission method and system, the storage medium and the terminal of the present invention flexibly select the scheduling-free transmission extension mode by setting a threshold, meet the transmission requirements of different services, improve the transmission efficiency of the system, and improve the service quality of the system.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless communications, and in particular to a scheduling-free transmission method and system, a storage medium and a terminal. Background Art

[0002] In traditional wireless communication systems, a scheduling-based uplink transmission process is usually adopted. The user equipment first sends a scheduling request to the base station to request uplink resources for new data transmission. After receiving the scheduling request, the base station learns that the user has data to transmit, and then feeds back an uplink authorization to the user, that is, a certain number of uplink resources allocated to the user. The user will use the uplink authorization to send a cache status report to the base station to provide the base station with the amount of data that needs to be transmitted in the user's uplink cache. Based on the information in the cache status report, the base station can allocate a sufficient number of uplink resources to the user so that the user can send the data in the cache. However, the above-mentioned scheduling-based uplink transmission process will bring a large data transmission delay and cannot meet the business needs with high delay requirements.

[0003] In order to avoid the delay problem caused by the scheduling-based uplink transmission process, the scheduling-free transmission mechanism has received extensive attention and research. In order to achieve scheduling-free transmission, the base station needs to pre-allocate periodic uplink resources to users. In order to reduce resource waste, the same uplink resource is usually pre-allocated to multiple users. When a user's uplink data arrives, the user can use the pre-allocated uplink resources to send data. However, if multiple users happen to send data on the same uplink resource, a conflict problem will arise. When a conflict occurs, if the base station cannot successfully decode the data sent by the user, it needs to perform retransmission, which will significantly increase the delay of scheduling-free transmission.

[0004] In order to alleviate the above-mentioned conflict problem, the terminal can use orthogonal codes to expand the data when performing scheduling-free transmission. If multiple terminals transmitting at the same time use different extension sequences, the base station can detect the data transmitted by multiple terminals. However, expanding the data also means that the time and frequency resources occupied by the terminal to send data will increase significantly. Therefore, it is necessary to design flexible scheduling-free transmission extension modes and extension mode selection methods according to the transmission delay requirements and data packet sizes of different service types to meet the transmission requirements of different services. Summary of the invention

[0005] In view of the shortcomings of the prior art mentioned above, the purpose of the present invention is to provide a scheduling-free transmission method and system, a storage medium and a terminal, which can flexibly select the extended mode of scheduling-free transmission by setting thresholds, thereby meeting the transmission requirements of different services, improving the transmission efficiency of the system, and improving the service quality of the system.

[0006] To achieve the above-mentioned purpose and other related purposes, the present invention provides a scheduling-free transmission method, which is applied to a terminal and includes the following steps: setting a selection threshold of a scheduling-free transmission extension mode; when performing scheduling-free transmission, selecting the scheduling-free transmission extension mode based on the selection threshold; transmitting a data packet to a base station based on the scheduling-free transmission extension mode, and receiving feedback information sent by the base station.

[0007] In one embodiment of the present invention, the selection threshold includes a data packet size threshold and a transmission delay threshold.

[0008] In one embodiment of the present invention, the scheduling-free transmission extension mode includes a full data packet extension mode, a packet header extension mode and a non-extension mode;

[0009] Selecting the scheduling-free transmission extension mode based on the selection threshold comprises the following steps:

[0010] When the size of the data packet to be transmitted is less than or equal to the data packet size threshold, and the transmission delay limit is less than or equal to the transmission delay threshold, selecting the full data packet extension mode;

[0011] When the size of the data packet to be transmitted is greater than the data packet size threshold and the transmission delay limit is less than or equal to the transmission delay threshold, selecting the packet header extension mode;

[0012] When the transmission delay of the data packet to be transmitted is greater than the transmission delay threshold, the non-extension mode is selected.

[0013] In one embodiment of the present invention, the scheduling-free transmission extension mode is predetermined by the terminal and the base station or the optional mode range is dynamically updated; the selection threshold is configured by the terminal itself or by the base station for the terminal.

[0014] In one embodiment of the present invention, it further includes sending a preamble code to the base station before transmitting a data packet to the base station based on the scheduling-free transmission extension mode, wherein the preamble code is used to indicate the scheduling-free transmission extension mode adopted.

[0015] The present invention provides a scheduling-free transmission system, which is applied to a terminal and includes a setting module, a selection module and a transmission module;

[0016] The setting module is used to set the selection threshold of the scheduling-free transmission extension mode;

[0017] The selection module is used to select the scheduling-free transmission extension mode based on the selection threshold when performing scheduling-free transmission;

[0018] The transmission module is used to transmit a data packet to a base station based on the scheduling-free transmission extension mode, and receive feedback information sent by the base station.

[0019] The present invention provides a storage medium on which a computer program is stored. When the program is executed by a processor, the above-mentioned scheduling-free transmission method is implemented.

[0020] The present invention provides a scheduling-free transmission terminal, comprising: a processor and a memory;

[0021] The memory is used to store computer programs;

[0022] The processor is used to execute the computer program stored in the memory, so that the scheduling-free transmission terminal executes the above-mentioned scheduling-free transmission method.

[0023] The present invention provides a scheduling-free transmission system, comprising the scheduling-free transmission terminal and a base station as described above;

[0024] The base station is used to receive the data packet sent by the scheduling-free transmission terminal and send feedback information to the scheduling-free transmission terminal.

[0025] In one embodiment of the present invention, when the data packet received by the base station adopts the full data packet extension mode or the non-extension mode, if the base station successfully decodes the data packet, the base station feeds back ACK information; if the base station fails to decode the data packet, the base station feeds back NACK information, so that the terminal waits for the next scheduling-free transmission resource for retransmission or initiates scheduling-based uplink transmission;

[0026] When the data packet received by the base station adopts the packet header extension mode, if the base station successfully decodes the packet header and the payload of the data packet, the base station feeds back ACK information; if the base station only successfully decodes the packet header and fails to decode the payload, the base station extracts the corresponding user identifier from the packet header, and feeds back NACK information and a scheduling-based uplink authorization, so that the terminal uses the uplink authorization to retransmit data; if the base station fails to decode both the packet header and the payload, the base station feeds back NACK information, so that the terminal waits for the next scheduling-free transmission resource for retransmission or initiates scheduling-based uplink transmission.

[0027] As described above, the scheduling-free transmission method and system, storage medium and terminal of the present invention have the following beneficial effects:

[0028] (1) The extension mode can be flexibly adjusted based on different data packet sizes, which improves transmission efficiency and saves transmission resources. Smaller data packets can use the full data packet extension mode, which can quickly complete data transmission on scheduling-free transmission resources with a lower probability of conflict. Larger data packets can use the packet header extension mode. The data packet payload is not extended to avoid occupying too many transmission resources, but the data packet header is extended to significantly increase the detection probability of the base station for the packet header, making it easier for the base station to allocate dedicated uplink authorization to the terminal when a payload conflict occurs, thereby using dedicated resources to quickly complete the transmission of large data packets.

[0029] (2) Different extension modes can be adopted based on the transmission delay requirements of different services. For services with higher delay requirements (for example, transmission must be completed within 50 ms), the full data packet extension mode or the packet header extension mode can be used. The extension can reduce the probability of conflict and quickly complete the transmission of data packets. For services with lower delay requirements (for example, transmission can be completed within 300 ms), the non-extension mode can be used because the delay caused by waiting for subsequent resources will not significantly affect its service quality. Limited transmission resources will be used first for services with higher delay requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Shown is a flow chart of a scheduling-free transmission method in one embodiment of the present invention;

[0031] Figure 2 A schematic diagram showing a scenario of wireless communication in an embodiment;

[0032] Figure 3 Shown is a schematic diagram of the structure of a scheduling-free transmission system in one embodiment of the present invention;

[0033] Figure 4 Shown is a schematic diagram of the structure of a scheduling-free transmission terminal in one embodiment of the present invention;

[0034] Figure 5 It is a schematic structural diagram of another embodiment of the scheduling-free transmission system of the present invention.

[0035] Component number description

[0036] 31 Setting Module

[0037] 32 Select Module

[0038] 33 Transmission Module

[0039] 41 Processor

[0040] 42 Memory

[0041] 51 Dispatch-free transmission terminal

[0042] 52 Base Stations DETAILED DESCRIPTION

[0043] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0044] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0045] In the scheduling-free transmission method and system, storage medium and terminal of the present invention, when the terminal performs scheduling-free transmission, the scheduling-free transmission extension mode is selected based on the threshold value, the base station receives and decodes the data packet sent by the terminal on the scheduling-free transmission resource, determines the scheduling-free transmission extension mode corresponding to the data packet, and feeds back confirmation response / negative response information, or feeds back scheduling-based uplink authorization, thereby meeting the transmission requirements of different services, improving the transmission efficiency of the system, and improving the service quality of the system, which is very practical.

[0046] like Figure 1 As shown, in one embodiment, the scheduling-free transmission method of the present invention is applied to a terminal, comprising the following steps:

[0047] Step S1: Setting a selection threshold for a scheduling-free transmission extension mode.

[0048] Specifically, in Figure 2 When performing scheduling-free transmission in the wireless communication scenario shown, it is first necessary to set a selection threshold of the scheduling-free transmission extended mode. In an embodiment of the present invention, the selection threshold can be configured by the terminal itself or by the base station for the terminal.

[0049] Specifically, the selection threshold includes a data packet size threshold S and a transmission delay threshold D.

[0050] Step S2: When performing scheduling-free transmission, selecting a scheduling-free transmission extension mode based on the selection threshold.

[0051] Specifically, the scheduling-free transmission extension mode includes the following three modes:

[0052] 1) Full data packet extension mode

[0053] Specifically, in this mode, the terminal uses an extended sequence to extend the entire data packet and transmits it on the scheduling-free transmission resources.

[0054] 2) Header extension mode

[0055] Specifically, in this mode, the terminal only uses the extension sequence to extend the header of the data packet including the user identification, and the payload of the data packet does not need to be extended. The data packet after the header extension is transmitted on the scheduling-free transmission resource.

[0056] 3) No extension mode

[0057] Specifically, in this mode, the terminal does not expand the data packet, but directly transmits the data packet on the scheduling-free transmission resources.

[0058] In one embodiment of the present invention, the scheduling-free transmission extension mode can predetermine the optional mode range by the terminal and the base station, that is, pre-select the optional mode from the full data packet extension mode, the header extension mode and the non-extension mode; or the terminal and the base station can dynamically update the optional mode range, that is, dynamically determine the optional mode from the full data packet extension mode, the header extension mode and the non-extension mode.

[0059] In one embodiment of the present invention, selecting the scheduling-free transmission extension mode based on the selection threshold comprises the following steps:

[0060] 21) When the size of the data packet to be transmitted is less than or equal to the data packet size threshold S, and the transmission delay limit is less than or equal to the transmission delay threshold D, the full data packet extension mode is selected.

[0061] 22) When the size of the data packet to be transmitted is greater than the data packet size threshold S and the transmission delay limit is less than or equal to the transmission delay threshold D, the packet header extension mode is selected.

[0062] 23) When the transmission delay of the data packet to be transmitted is greater than the transmission delay threshold D, the non-extension mode is selected.

[0063] Preferably, before the terminal transmits a data packet to the base station, it may send a preamble to the base station, and the preamble is used to indicate the non-scheduled transmission extension mode used. Specifically, the preamble and the non-scheduled transmission extension mode may correspond one to one. The base station can know the non-scheduled transmission extension mode used by the data packet transmitted thereafter through the received preamble. For example, before sending a data packet using the full data packet extension mode, terminal 1 sends a preamble P1. After receiving the preamble P1, the base station can know that the data packet uses the full data packet extension mode and despreads the entire data packet. Before sending a data packet using the header extension mode, terminal 2 sends a preamble P2. After receiving the preamble P2, the base station can know that the data packet uses the header extension mode and despreads the data packet header. Before sending a data packet using the non-extension mode, terminal 3 sends a preamble P3. After receiving the preamble P3, the base station can know that the data packet uses the non-extension mode and does not need to be despread.

[0064] Step S3: transmitting a data packet to a base station based on the scheduling-free transmission extension mode, and receiving feedback information sent by the base station.

[0065] Specifically, the base station receives and decodes the data packet sent by the terminal on the unscheduled transmission resource, determines the unscheduled transmission extension mode corresponding to the data packet, and feeds back confirmation (ACK) / negative confirmation (NACK) information, or feeds back the uplink authorization based on scheduling.

[0066] In one embodiment of the present invention, when the data packet received by the base station adopts the full data packet extension mode or the non-extension mode, the feedback is as follows:

[0067] 1) If the base station successfully decodes the data packet, the base station feeds back ACK information.

[0068] 2) If the base station fails to decode the data packet, the base station feeds back NACK information, so that the terminal waits for the next scheduling-free transmission resource for retransmission or initiates scheduling-based uplink transmission.

[0069] When the data packet received by the base station adopts the packet header extension mode, the feedback is as follows:

[0070] 1) If the base station successfully decodes the header and payload of the data packet, the base station feeds back ACK information.

[0071] 2) If the base station only successfully decodes the packet header but fails to decode the payload, the base station extracts the corresponding user identifier from the packet header and feeds back NACK information and a scheduling-based uplink authorization, so that the terminal uses the uplink authorization to retransmit data.

[0072] 3) If the base station fails to decode both the packet header and the payload, the base station feeds back NACK information, so that the terminal waits for the next scheduling-free transmission resource for retransmission or initiates scheduling-based uplink transmission.

[0073] like Figure 3 As shown, in one embodiment, the scheduling-free transmission system of the present invention is applied to a terminal, including a setting module 31, a selection module 32 and a transmission module 33.

[0074] The setting module 31 is used to set a selection threshold of the scheduling-free transmission extension mode.

[0075] The selection module 32 is connected to the setting module 31, and is used to select the scheduling-free transmission extension mode based on the selection threshold when performing scheduling-free transmission.

[0076] The transmission module 33 is connected to the selection module 32, and is used to transmit data packets to the base station based on the scheduling-free transmission extension mode, and receive feedback information sent by the base station.

[0077] Among them, the structures and principles of the setting module 31, the selection module 32 and the transmission module 33 correspond one to one with the steps in the above-mentioned scheduling-free transmission method, so they are not repeated here.

[0078] It should be noted that it should be understood that the division of the various modules of the above device is only a division of logical functions. In actual implementation, they can be fully or partially integrated into one physical entity, or they can be physically separated. And these modules can all be implemented in the form of software called by processing elements, or they can all be implemented in the form of hardware, or some modules can be implemented in the form of software called by processing elements, and some modules can be implemented in the form of hardware. For example: the x module can be a separately established processing element, or it can be integrated in a certain chip of the above device. In addition, the x module can also be stored in the memory of the above device in the form of program code, and called and executed by a certain processing element of the above device. The implementation of other modules is similar. These modules can be integrated together in whole or in part, or they can be implemented independently. The processing element described here can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each module above can be completed by an integrated logic circuit of hardware in the processor element or instructions in the form of software. The above modules may be one or more integrated circuits configured to implement the above methods, such as one or more application specific integrated circuits (ASIC), one or more microprocessors (DSP), one or more field programmable gate arrays (FPGA), etc. When a module is implemented in the form of a processing element scheduling program code, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call program code. These modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0079] The storage medium of the present invention stores a computer program, which implements the above-mentioned scheduling-free transmission method when executed by the processor. Preferably, the storage medium includes: ROM, RAM, disk, USB flash drive, memory card or optical disk and other media that can store program codes.

[0080] like Figure 4 As shown, in one embodiment, the scheduling-free transmission terminal of the present invention includes: a processor 41 and a memory 42.

[0081] The memory 42 is used to store computer programs, and includes: ROM, RAM, disk, USB flash drive, memory card, optical disk, and other media that can store program codes.

[0082] The processor 41 is connected to the memory 42 and is used to execute the computer program stored in the memory so that the scheduling-free transmission terminal executes the above-mentioned scheduling-free transmission method.

[0083] Preferably, the processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.

[0084] like Figure 5 As shown, in one embodiment, the scheduling-free transmission system of the present invention includes the scheduling-free transmission terminal 51 and the base station 52 mentioned above.

[0085] The base station 52 is in communication connection with the scheduling-free transmission terminal 51 , and is configured to receive data packets sent by the scheduling-free transmission terminal 51 , and send feedback information to the scheduling-free transmission terminal 51 .

[0086] In summary, the scheduling-free transmission method and system, storage medium and terminal of the present invention can flexibly adjust the extension mode based on different data packet sizes, improve transmission efficiency and save transmission resources; wherein, a smaller data packet can use the full data packet extension mode, and can quickly complete data transmission on the scheduling-free transmission resources with a lower probability of conflict; and a larger data packet can use the header extension mode, the data packet payload is not extended to avoid occupying too many transmission resources, and the data packet header is extended to significantly increase the detection probability of the base station to the packet header, so that the base station can allocate a dedicated uplink authorization to the terminal when a load conflict occurs, thereby using dedicated resources to quickly complete the transmission of large data packets; different extension modes can be adopted based on the transmission delay requirements of different services, wherein for services with higher delay requirements (for example, transmission must be completed within 50ms), a full data packet extension mode or a header extension mode can be used, and the extension can be used to reduce the probability of conflict and quickly complete the transmission of the data packet; for services with lower delay requirements (for example, transmission can be completed within 300ms), a non-extension mode can be used, because the delay caused by waiting for subsequent resources will not significantly affect its service quality, and limited transmission resources will be used preferentially for services with higher delay requirements. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0087] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A scheduling-free transmission method, applied to a terminal, characterized in that: The following steps are involved: Set the selection threshold of the scheduling-free transmission extension mode; When performing scheduling-free transmission, selecting a scheduling-free transmission extension mode based on the selection threshold; Transmitting a data packet to a base station based on the scheduling-free transmission extension mode, and receiving feedback information sent by the base station; The selection threshold includes a data packet size threshold and a transmission delay threshold; The scheduling-free transmission extension mode includes a full data packet extension mode, a header extension mode and a non-extension mode; in the full data packet extension mode, the terminal uses an extension sequence to extend the entire data packet and transmits it on the scheduling-free transmission resource; in the header extension mode, the terminal only uses an extension sequence to extend the header of the data packet including the user identifier, and the payload of the data packet does not need to be extended, and the data packet after the header extension is transmitted on the scheduling-free transmission resource; in the non-extension mode, the terminal does not extend the data packet and directly transmits the data packet on the scheduling-free transmission resource; Selecting the scheduling-free transmission extension mode based on the selection threshold comprises the following steps: When the size of the data packet to be transmitted is less than or equal to the data packet size threshold, and the transmission delay limit is less than or equal to the transmission delay threshold, selecting the full data packet extension mode; When the size of the data packet to be transmitted is greater than the data packet size threshold and the transmission delay limit is less than or equal to the transmission delay threshold, selecting the packet header extension mode; When the transmission delay of the data packet to be transmitted is greater than the transmission delay threshold, the non-extension mode is selected.

2. The scheduling-free transmission method according to claim 1, characterized in that: The scheduling-free transmission extension mode is predetermined by the terminal and the base station or the optional mode range is dynamically updated; the selection threshold is configured by the terminal itself or configured by the base station for the terminal.

3. The scheduling-free transmission method according to claim 1, characterized in that: It also includes sending a preamble code to the base station before transmitting a data packet to the base station based on the scheduling-free transmission extension mode, wherein the preamble code is used to indicate the scheduling-free transmission extension mode adopted.

4. A scheduling-free transmission system, applied to a terminal, characterized in that: It includes a setting module, a selection module and a transmission module; The setting module is used to set the selection threshold of the scheduling-free transmission extension mode; The selection module is used to select the scheduling-free transmission extension mode based on the selection threshold when performing scheduling-free transmission; The transmission module is used to transmit a data packet to a base station based on the scheduling-free transmission extension mode, and receive feedback information sent by the base station; The selection threshold includes a data packet size threshold and a transmission delay threshold; The scheduling-free transmission extension mode includes a full data packet extension mode, a header extension mode and a non-extension mode; in the full data packet extension mode, the terminal uses an extension sequence to extend the entire data packet and transmits it on the scheduling-free transmission resource; in the header extension mode, the terminal only uses an extension sequence to extend the header of the data packet including the user identifier, and the payload of the data packet does not need to be extended, and the data packet after the header extension is transmitted on the scheduling-free transmission resource; in the non-extension mode, the terminal does not extend the data packet and directly transmits the data packet on the scheduling-free transmission resource; Selecting the scheduling-free transmission extension mode based on the selection threshold comprises the following steps: When the size of the data packet to be transmitted is less than or equal to the data packet size threshold, and the transmission delay limit is less than or equal to the transmission delay threshold, selecting the full data packet extension mode; When the size of the data packet to be transmitted is greater than the data packet size threshold and the transmission delay limit is less than or equal to the transmission delay threshold, selecting the packet header extension mode; When the transmission delay of the data packet to be transmitted is greater than the transmission delay threshold, the non-extension mode is selected.

5. A storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the scheduling-free transmission method described in any one of claims 1 to 3 is implemented.

6. A scheduling-free transmission terminal, characterized in that: include: Processor and memory; The memory is used to store computer programs; The processor is used to execute the computer program stored in the memory, so that the scheduling-free transmission terminal executes the scheduling-free transmission method according to any one of claims 1 to 3.

7. A scheduling-free transmission system, characterized in that: Including the scheduling-free transmission terminal and base station as described in claim 6; The base station is used to receive the data packet sent by the scheduling-free transmission terminal and send feedback information to the scheduling-free transmission terminal.

8. The scheduling-free transmission system according to claim 7, characterized in that: When the data packet received by the base station adopts the full data packet extension mode or the non-extension mode, if the base station successfully decodes the data packet, the base station feeds back ACK information; if the base station fails to decode the data packet, the base station feeds back NACK information, so that the terminal waits for the next scheduling-free transmission resource for retransmission or initiates scheduling-based uplink transmission; When the data packet received by the base station adopts the packet header extension mode, if the base station successfully decodes the packet header and the payload of the data packet, the base station feeds back ACK information; If the base station only decodes the packet header successfully but fails to decode the payload, the base station extracts the corresponding user identifier from the packet header and feeds back NACK information and an uplink grant based on scheduling, so that the terminal retransmits data using the uplink grant; If the base station fails to decode both the packet header and the payload, the base station feeds back NACK information, so that the terminal waits for the next scheduling-free transmission resource for retransmission or initiates scheduling-based uplink transmission.

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