WO2020077752A1 - Data transmission method and apparatus, and electronic device - Google Patents

Abstract

The present invention relates to the technical field of communications, provides a data transmission method and apparatus, and an electronic device, and can reduce user plane delay while ensuring resource utilization. The method comprises: determining a transmission result of a previous data packet by a terminal; if the transmission result indicates that the transmission is successful or not completed, determining at least two shared basic transmission units according to the terminal ID, the total number of basic transmission units, and a preset mapping rule; if the transmission result indicates a transmission failure and the previous data packet does not meet retransmission conditions, determining at least one basic transmission unit exclusively for the terminal according to the terminal ID, wherein the retransmission conditions are that the data packet is transmitted only once and does not experience queuing delay when the data packet is transmitted; and then, transmitting a data packet to be transmitted to a base station by means of the determined basic transmission unit.

Description

Data transmission method, device and electronic equipment

This application requires the priority of the Chinese patent application filed on October 18, 2018 in the Chinese Patent Office with the application number 201811217565.X and the invention titled "A Data Transmission Method, Device, and Electronic Equipment", the entire contents of which are incorporated by reference In this application.

Technical field

This application relates to the field of communication technologies, and in particular, to a data transmission method, device, and electronic equipment.

Background technique

In order to meet the latency of low latency and high reliability communication (Ultra Reliable and Low Latency Communications, URLLC), the uplink unlicensed transmission scheme is currently proposed, that is, during the uplink transmission process, the terminal can directly transmit the uplink on the pre-configured resources The data saves the process of the terminal sending a resource scheduling request to the base station. Compared with the traditional authorized transmission scheme, the uplink unlicensed transmission scheme saves resource request and authorization time and reduces user plane delay. At the same time, considering that URLLC supports machine-type communication and the number of users is relatively large, in order to increase the system capacity, Sparse Code Multiple Access (SCMA) technology can be introduced into the uplink unlicensed system, which is realized by code domain multiplexing Data packets sent by multiple user equipment are transmitted on the same resource. Therefore, for the uplink, URLLC communication can be achieved through an unlicensed non-orthogonal multiple access technology.

Since the resource request of the terminal and the authorization of the base station are canceled, the terminal cannot know the resources used for the initial transmission and retransmission of the data packet. In order to solve this problem, the prior art generally adopts a semi-persistent scheduling method to configure the initial transmission resources for each terminal served by the base station, and configures a shared retransmission resource for each group of terminals. However, since the number of terminals that send data packets to the base station in practical applications is much smaller than the number of all terminals served by the base station, the initial transmission resources and retransmission resources allocated to the terminals may not actually be used, resulting in a lot of waste of resources Therefore, it is currently impossible to balance resource utilization and user plane delay when implementing URLLC communication.

Summary of the invention

The purpose of the embodiments of the present application is to provide a data transmission method, device and electronic equipment, so as to reduce the user plane delay on the basis of ensuring resource utilization. The specific technical solutions are as follows:

In a first aspect, a data transmission method is provided, which is characterized in that it is applied to a terminal, and the method includes:

Determine the transmission result of the last data packet by the terminal;

If the transmission result is successful or untransmitted, at least two shared basic transmission units are determined according to the terminal's identity ID, the total number of basic transmission units, and preset mapping rules;

If the transmission result is transmission failure and the last data packet does not satisfy the retransmission condition, then at least one basic transmission unit exclusively for the terminal is determined according to the terminal ID; the retransmission condition is a data packet It has only been sent once and the data packet was sent without queuing delay;

Sending the data packet to be transmitted to the base station through the determined basic transmission unit.

Optionally, the method further includes:

If the feedback message containing the transmission result sent by the base station has not been received before sending the data packet to be transmitted, it is determined whether the number of terminals served by the base station is less than the total number of basic transmission units;

If the number of terminals served by the base station is less than the total number of basic transmission units, at least two are determined according to the ID of the terminal, the total number of basic transmission units, the number of terminals served by the base station and the first initial mapping rule Shared basic transmission unit;

If the number of terminals served by the base station is greater than or equal to the total number of basic transmission units, then according to the ID of the terminal, the total number of basic transmission units, the number of terminals served by the base station and the second initial mapping rule, determine at least Two shared basic transmission units;

Sending the data packet to be transmitted to the base station through the determined at least two shared basic transmission units.

Optionally, if the transmission result is successful or untransmitted, determining at least two shared basic transmission units according to the terminal's identity ID, the total number of basic transmission units, and a preset mapping rule includes: :

Determine that the transmission result in the current time slot is the number of terminals with successful or untransmitted transmission, and the transmission result in the current time slot is the number of terminals with failed transmission;

Determine the arrangement position of the terminal ID in the current time slot transmission result is a terminal that is successfully transmitted or not transmitted;

Determine the number of basic transmission units for sharing based on the total number of basic transmission units and the number of terminals that failed to transmit based on the transmission result of the current time slot;

If the number of basic transmission units for sharing is greater than the number of terminals in the current time slot whose transmission result is successful or untransmitted, the transmission result in the current time slot according to the terminal ID is transmission successful or unsuccessful The arrangement position in the transmitted terminals, the transmission result of the current time slot is the number of terminals that have been successfully transmitted or not transmitted, the transmission result of the current time slot is the number of terminals that failed to be transmitted, and the basic transmission unit for sharing The quantity and the first preset mapping rule determine at least two shared basic transmission units;

If the number of basic transmission units used for sharing is less than or equal to the number of terminals in the current time slot whose transmission result is successful or untransmitted, the transmission result in the current time slot according to the ID of the terminal is transmission successful or not The arrangement position in the transmitted terminals, the transmission result of the current time slot is the number of terminals that failed to transmit, the number of shared basic transmission units and the second preset mapping rule, to determine at least two shared basic transmission units .

Optionally, if the transmission result is transmission failure and the last data packet does not satisfy the retransmission condition, determining at least one basic transmission unit exclusively for the terminal according to the terminal ID includes:

If the transmission result of the last data packet by the terminal is that the first type of transmission fails, and the last data packet does not satisfy the retransmission condition, the transmission result in the current time slot according to the terminal ID is the first The arrangement position of a terminal of a type of transmission failure determines a basic transmission unit exclusively for the terminal, the first type of transmission failure is the failure of the terminal to transmit the last packet, and the terminal and the base station The distance between is less than or equal to the distance threshold;

If the transmission result of the last data packet by the terminal is that the second type of transmission fails, and the last data packet does not satisfy the retransmission condition, the transmission result in the current time slot according to the terminal ID is the first The arrangement position of the terminal of the second type of transmission failure, the transmission result of the current time slot is the number of terminals of the first type of transmission failure and the transmission result of the current time slot is the number of terminals of the second type of transmission failure, determine two For the basic transmission unit exclusively for the terminal, the second type of transmission failure is that the terminal fails to transmit the last data packet, and the distance between the terminal and the base station is greater than the distance threshold.

Optionally, the method further includes:

If the transmission result of the last data packet by the terminal is that the first type of transmission fails, and the last data packet meets the retransmission condition, the transmission result in the current time slot according to the terminal ID is the first Arranging positions in the terminal where the class transmission fails, determining a basic transmission unit exclusively for the terminal, and retransmitting the previous data packet to the base station through the determined basic transmission unit exclusively for the terminal;

If the transmission result of the last data packet by the terminal is that the second type of transmission fails, and the last data packet meets the retransmission condition, the transmission result in the current time slot according to the terminal ID is the second The arrangement position of the terminals that failed to transmit similarly, the transmission result of the current time slot is the number of terminals that failed to transmit in the first category, and the transmission result of the current time slot is the number of terminals that failed in transmission in the second category, and two are determined to be exclusive to the terminal The basic transmission unit of, retransmits the last data packet to the base station through the determined two basic transmission units exclusively for the terminal.

In a second aspect, a data transmission device is provided, which is characterized in that it is applied to a terminal, and the device includes:

The determining module is used to determine the transmission result of the terminal to the last data packet; if the transmission result is successful or untransmitted, according to the terminal's identity ID, the total number of basic transmission units and preset mapping rules , Determine at least two shared basic transmission units; if the transmission result is transmission failure and the last data packet does not satisfy the retransmission condition, then determine at least one basic base for exclusive use by the terminal according to the terminal ID Transmission unit; the retransmission condition is that the data packet has only been sent once and the data packet has not been subjected to queuing delay;

The sending module is configured to send the data packet to be transmitted to the base station through the basic transmission unit determined by the determining module.

Optionally, the device further includes: a judgment module;

The judging module is used to judge whether the number of terminals served by the base station is less than the total number of basic transmission units if the feedback message containing the transmission result sent by the base station has not been received before sending the data packet to be transmitted Quantity

The determining module is further configured to: if the number of terminals served by the base station determined by the determining module is less than the total number of basic transmission units, based on the terminal ID, the total number of basic transmission units, the base station The number of service terminals and the first initial mapping rule to determine at least two shared basic transmission units; if the number of terminals served by the base station judged by the judgment module is greater than or equal to the total number of basic transmission units, according to the terminal ID, the total number of basic transmission units, the number of terminals served by the base station, and the second initial mapping rule, determine at least two shared basic transmission units;

The sending module is further configured to send the data packet to be transmitted to the base station through at least two shared basic transmission units determined by the determining module.

Optionally, the determination module is specifically configured to: determine that the transmission result in the current time slot is the number of terminals with successful or untransmitted transmission, and the transmission result in the current time slot is the number of terminals with failed transmission; determine the terminal The transmission result of the ID in the current time slot is the arrangement position in the terminal with successful or untransmitted transmission; based on the total number of basic transmission units and the transmission result of the current time slot with the number of failed transmission terminals, determine the shared terminal Number of basic transmission units; if the number of basic transmission units for sharing is greater than the number of terminals whose transmission is successful or not transmitted in the current time slot, the transmission result in the current time slot according to the terminal ID Is the arrangement position in the terminal with successful or untransmitted transmission, the transmission result of the current time slot is the number of terminals with successful or untransmitted transmission, the transmission result of the current time slot is the number of terminals with failed transmission, and the The number of shared basic transmission units and the first preset mapping rule determine at least two shared basic transmission units; if the If the number of basic transmission units is less than or equal to the current time slot, the transmission result is the number of successful or untransmitted terminals, then the transmission result of the current time slot according to the terminal ID is the arrangement position of the successful or untransmitted terminal 2. The transmission result of the current time slot is the number of terminals that failed to transmit, the number of shared basic transmission units and the second preset mapping rule, and at least two shared basic transmission units are determined.

Optionally, the determining module is specifically configured to: if the terminal transmits the last data packet as the first type of transmission failure, and the last data packet does not satisfy the retransmission condition, then determine The transmission result of the terminal ID in the current time slot is the arrangement position of the terminal of the first type of transmission failure, and a basic transmission unit exclusively for the terminal is determined, and the first type of transmission failure is the previous Data packet transmission fails, and the distance between the terminal and the base station is less than or equal to the distance threshold; if the result of the terminal's transmission of the previous data packet is a second type of transmission failure, and the previous data packet is not satisfied For the retransmission condition, the transmission result of the ID of the terminal in the current time slot is the arrangement position of the terminal of the second type of transmission failure, and the transmission result of the current time slot is the number of terminals of the first type of transmission failure and the current The transmission result of the time slot is the number of terminals of the second type of transmission failure, and determine two basic transmission units for exclusive use by the terminal, and the second type of transmission failure is the last number of the terminal pair Packet fails, and the distance between the terminal and the base station is greater than the distance threshold.

Optionally, the device further includes: a first retransmission module and a second retransmission module;

The first retransmission module is configured to: if the transmission result of the last data packet by the terminal is that the first type of transmission fails, and the last data packet satisfies the retransmission condition, according to the terminal ID The transmission result of the current time slot is the arrangement position of the terminal of the first type of transmission failure, determine a basic transmission unit exclusively for the terminal, and retransmit to the base station through the determined basic transmission unit exclusively for the terminal The previous data packet;

The second retransmission module is configured to: if the transmission result of the last data packet by the terminal is that the second type of transmission fails, and the last data packet meets the retransmission condition, according to the terminal ID The transmission result in the current time slot is the arrangement position in the terminal of the second type of transmission failure, the transmission result of the current time slot is the number of terminals of the first type of transmission failure, and the transmission result of the current time slot is the second type For the number of terminals that failed to transmit, determine two basic transmission units exclusively for the terminal, and retransmit the previous data packet to the base station through the determined two basic transmission units exclusively for the terminal.

In a third aspect, an electronic device is provided, which is characterized by comprising a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory complete communication with each other through the communication bus;

Memory, used to store computer programs;

The processor, when used to execute the program stored in the memory, implements the steps of any of the above data transmission methods.

According to a fourth aspect, the implementation of the present application further provides a computer-readable storage medium in which a computer program is stored, and when the computer program is executed by a processor, the steps of any of the above data transmission methods are implemented.

According to a fifth aspect, an embodiment of the present application further provides a computer program product containing instructions, which when run on a computer, causes the computer to execute any of the above data transmission methods.

In the data transmission method, device and electronic equipment provided by the embodiments of the present application, the terminal can determine the shared basic transmission unit, that is, the terminal can send the data packet to be transmitted to the base station through the multiple shared basic transmission units, and the shared basic transmission unit can For multiple terminals to send data packets, because URLLC data packets have the characteristics of sporadic arrival, so different terminals use shared basic transmission units in different time slots without collisions, compared to the use of each terminal in the prior art The exclusive initial transmission resources can increase the frequency of the basic transmission unit being used and improve the resource utilization rate. In addition, since the exclusive basic transmission unit is determined for the terminal that failed to transmit the last data packet, it is guaranteed that the terminal will not collide again when sending the current data packet, so after sending the data packet with the prior art, it fails to choose to retransmit until the data Compared with the successful packet sending method, applying the embodiment of the present application can reduce the user plane delay. Therefore, the basic transmission unit available for the terminal is adjusted in real time according to the transmission result of the last data packet provided by the embodiment of the present application, and the user plane delay can be reduced on the basis of ensuring resource utilization.

Of course, implementing any of the products or methods of this application does not necessarily need to achieve all the advantages described above at the same time.

BRIEF DESCRIPTION

In order to more clearly explain the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, without paying any creative work, other drawings can be obtained based on these drawings.

1 is a schematic structural diagram of a data transmission system provided by an embodiment of the present application;

2 is a flowchart of a data transmission method provided by an embodiment of the present application;

3 is a schematic diagram of dividing a basic transmission unit according to an embodiment of the present application;

4 is a flowchart of another data transmission method provided by an embodiment of the present application;

5 is an exemplary schematic diagram of a data transmission method provided by an embodiment of the present application;

6 is a graph of the average packet loss rate provided by an embodiment of the present application as a function of the ratio of the number of terminals served by a base station to the total number of basic transmission units;

7 is a graph of a change in average packet loss rate with flow frequency according to an embodiment of the present application;

FIG. 8 is another graph of average packet loss rate versus flow frequency according to an embodiment of the present application;

9 is a graph of the average successful multiplexing rate provided by an embodiment of the present application as a function of the ratio of the number of terminals served by a base station to the total number of basic transmission units;

10 is a graph of the average successful multiplexing rate as a function of flow frequency provided by an embodiment of this application;

11 is a schematic structural diagram of a data transmission device according to an embodiment of the present application;

12 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of this application.

The data transmission method provided by the embodiment of the present application may be applied to the data transmission system shown in FIG. 1, the system includes: a terminal and a base station. Among them, the terminal may be a terminal with wireless communication function such as a mobile phone, a computer, a wearable device.

The terminal is used to send a data packet to be transmitted to the base station and receive the feedback message sent by the base station.

The base station is used to send a feedback message to the terminal served by the base station after receiving the data packet sent by at least one terminal.

With reference to FIG. 1, a data transmission method provided by an embodiment of the present application is applied to a terminal. As shown in FIG. 2, the method includes the following steps:

Step 201: Determine the transmission result of the last data packet by the terminal.

In one implementation, the terminal determines the transmission result of the last data packet through the feedback message sent by the base station received in the current time slot. Among them, the transmission results include: successful transmission, failed transmission and untransmitted.

Among them, the transmission failure includes the first type of transmission failure and the second type of transmission failure. The first type of transmission failure refers to the failure of the terminal to transmit the last packet, and the distance between the terminal and the base station is less than or equal to the distance threshold, indicating that the One packet is weakly retransmitted. The second type of transmission failure means that the terminal fails to transmit the last data packet, and the distance between the terminal and the base station is greater than the distance threshold, indicating that the previous data packet needs to be strongly retransmitted.

Exemplarily, after receiving the signal sent by the terminal, the base station may broadcast an acknowledgment message (ACK) to all terminals served by it. The ACK message may be an N-dimensional column vector, which may In the feedback message of the terminal, N is the number of terminals served by the base station.

Each element in the vector can be represented by a two-bit symbol. For example, X _n = 00 means that terminal n has not transmitted a data packet. X _n = 01 indicates that the distance between terminal n and the base station is less than or equal to the distance threshold, and the last data packet sent by terminal n fails to be transmitted, and weak retransmission is required. X _n = 10 means that the distance between terminal n and the base station is greater than the distance threshold, and the transmission of the last data packet sent by terminal n fails, and a strong retransmission is required. X _n = 11 indicates that the last data packet sent by terminal n was successfully transmitted.

Further, the terminal may preset a time slot every interval to send a data packet to the base station. For example, the preset time slot may be 1 time slot or 3 time slots.

Successful transmission means that the data packet sent by the terminal on the determined at least one basic transmission unit is successfully transmitted; transmission failure means that the data packets sent by the terminal on the determined basic transmission unit all collide; untransmitted means that the terminal is on the determined basic transmission unit No data packet is sent, or the terminal does not transmit on at least one basic transmission unit determined, and the transmission fails on the remaining determined basic transmission units.

For example: if the basic transmission units available to the terminal 5 are the basic transmission unit 1 and the basic transmission unit 3, if the data packet sent by the terminal 5 on the basic transmission unit 1 is successfully transmitted, the transmission of the data packet sent on the basic transmission unit 3 fails, Then, the data packet sent by the terminal 5 is successfully transmitted.

If the data packets sent by the terminal 5 on the basic transmission unit 1 and the basic transmission unit 3 both fail to be transmitted, the transmission of the data packets sent by the terminal 5 fails.

If the basic transmission unit 1 can be shared by the terminals 1, 2 and 3, the basic transmission unit 2 can be shared by the terminals 1 and 2. Assuming that terminals 2 and 3 send data packets to the base station in the same time slot, the data packets of terminal 2 and terminal 3 on the basic transmission unit 1 collide, and the transmission of the data packets of terminal 2 on the basic transmission unit 2 is successful, because the basic transmission unit 1 In the event of a collision, the base station cannot know which data packets sent by the terminal collided. Therefore, it is considered that all the data packets sent by the terminal 1, 2 and 3 in the basic transmission unit 1 collide. The data packet sent by the terminal 2 in the basic transmission unit 2 is successfully transmitted, so it is determined that the terminal 1 has not sent a data packet in the basic transmission unit 2. Therefore, the base station will give feedback to terminals 1, 2 and 3: terminal 1 has not transmitted the data packet, the data packet sent by terminal 2 has been successfully transmitted, and the data packet sent by terminal 3 has failed.

In step 202, if the transmission result is successful or untransmitted, at least two shared basic transmission units are determined according to the terminal's identity ID, the total number of basic transmission units, and preset mapping rules.

In one implementation, if the terminal transmits the last data packet as successful or untransmitted, the transmission result in the feedback message sent by the base station received in the current time slot according to the terminal's identity (IDentity, ID) is the transmission The arrangement position, the total number of basic transmission units and the preset mapping rule in the terminals that are successfully or untransmitted determine the preset number of shared basic transmission units. Exemplarily, the preset number may be 2 or 3.

Among them, the shared basic transmission unit can be used not only by the terminal that sends the data packet to be transmitted, but also to other terminals that are allocated with the basic transmission unit. For example, the shared basic transmission unit 1 can be shared by the terminal 1 and the terminal 2, and the shared basic transmission unit 2 can be shared by the terminal 1 and the terminal 3. In the embodiment of the present application, if multiple terminals simultaneously transmit data packets on the same basic transmission unit, the data packets transmitted on this basic transmission unit will collide, and the transmission result of these terminals in the feedback message of the base station is transmission failure. Conversely, if the terminal 1 and the terminal 2 are in different time slots and send data packets to the base station through the basic transmission unit 1, the data packets sent by the terminal 1 and the terminal 2 through the basic transmission unit 1 will not collide.

Step 203: If the transmission result is that the transmission fails and the last data packet does not satisfy the retransmission condition, then at least one basic transmission unit exclusively for the terminal is determined according to the terminal ID.

Among them, the retransmission condition is that the data packet has only been sent once and the queuing delay is not experienced when the data packet is sent.

If the terminal needs to send a data packet A, the terminal has other data packets to be sent before sending data packet A, or there are other data packets that need to be retransmitted, you need to wait for other data packets to be sent before sending data packet A , That is, packet A needs to experience queuing delay.

In one implementation, if the terminal fails to transmit the last data packet, it is determined whether the last data packet meets the retransmission condition; if the retransmission condition is met, then at least one of them is determined to be sent according to the terminal ID An exclusive basic transmission unit of a data packet; if the retransmission condition is not met, then at least one exclusive basic transmission unit for sending the data packet to be transmitted is determined according to the terminal ID.

Optionally, in order to support low-latency and high-reliability communication (Ultra Reliable and Low Latency Communications, URLLC), to ensure that the user plane delay does not exceed 1 millisecond, if the terminal waits for the transmission time of a data packet before sending data packet A , Then packet A can only be transmitted once. If the terminal waits for the transmission time of two data packets before sending the data packet A, it does not send the data packet to the base station.

Step 204: Send the data packet to be transmitted to the base station through the determined basic transmission unit.

In an implementation manner, if there are multiple determined basic transmission units, the data packets to be transmitted are sent to the base station through each basic transmission unit.

In the data transmission method provided by the embodiment of the present application, the terminal can determine a shared basic transmission unit, that is, the terminal can send the data packet to be transmitted to the base station through multiple shared basic transmission units, and the shared basic transmission unit can be sent by multiple terminals Data packets, because URLLC data packets have the characteristics of sporadic arrival, so different terminals use shared basic transmission units in different time slots without collision, compared with the prior art. Each terminal uses exclusive initial transmission resources , Can increase the frequency of the basic transmission unit is used, and improve resource utilization. In addition, since the exclusive basic transmission unit is determined for the terminal that failed to transmit the last data packet, it is guaranteed that the terminal will not collide again when sending the current data packet, so after sending the data packet with the prior art, it fails to choose to retransmit until the data Compared with the successful packet sending method, applying the embodiment of the present application can reduce the user plane delay. Therefore, the basic transmission unit available for the terminal is adjusted in real time according to the transmission result of the last data packet provided by the embodiment of the present application, and the user plane delay can be reduced on the basis of ensuring resource utilization.

In the embodiment of the present application, the total number of basic transmission units is determined according to the uplink resources that the base station can use for the terminal.

Optionally, the embodiment of the present application uses Sparse Code Multiple Access (SCMA) technology to divide the basic transmission unit. In SCMA technology, the bit stream of data is mapped to codewords for transmission, and N positive The cross resource can generate C different codebooks, one terminal corresponds to one codebook, so N orthogonal resources can support the data of C terminals to be superimposed and transmitted on it. After introducing the codebook multiplexing technology, L guides are used The frequency sequence corresponds to one codebook, and one codebook corresponds to L terminals, then N orthogonal resources can be divided into C × L basic transmission units, and a schematic diagram of dividing the basic transmission units is shown in FIG. 3.

among them,

K represents the number of non-zero entities in a codeword.

Before the above step 201, if the system is in the initial time slot, none of the terminals served by the base station has used the method of the embodiment of the present application to transmit data packets to the base station. It can also be understood that the terminal has not received the base station before sending the data packet to be transmitted The feedback message containing the transmission result is sent to the base station by the method shown in FIG. 4, which specifically includes the following steps:

Step 401: Determine whether the number of terminals served by the base station is less than the total number of basic transmission units.

In one implementation, if the system is in the initial time slot, it is determined whether the number N of terminals served by the base station is less than the total number M of basic transmission units.

If N is less than M, step 402 is performed; if N is greater than or equal to M, step 403 is performed.

Step 402, if the number of terminals served by the base station is less than the total number of basic transmission units, then at least two shared basic transmission units are determined according to the terminal ID, the total number of basic transmission units, the number of terminals served by the base station and the first initial mapping rule.

In one implementation, if the number N of terminals served by the base station is less than the total number M of basic transmission units, then R shared basic transmission units are determined according to the first initial mapping rule, that is, formula (1):

Among them, ID is the ID of the terminal, M is the total number of basic transmission units, N is the number of terminals served by the base station, R is the preset number of shared basic transmission units available to the terminal, and mod represents the remainder operation.

Exemplarily, if the terminal ID is 3, N = 5, M = 10, and R = 2, a basic transmission unit index determined by terminal 3 can be obtained according to formula (1): 3mod10 = 3; since R = 2 , It can be determined that another basic transmission unit index corresponding to terminal 3 is: (3+ (2-1) × 5) mod10 = 8.

Step 403: If the number of terminals served by the base station is greater than or equal to the total number of basic transmission units, determine at least two shared basic transmission units according to the terminal ID, the total number of basic transmission units, the number of terminals served by the base station and the second initial mapping rule .

In one implementation, if the number N of terminals served by the base station is greater than or equal to the total number M of basic transmission units, then R shared basic transmission units are determined according to the second initial mapping rule, that is, formula (2):

Wherein, ID is the ID of the terminal, M is the number of basic transmission units, R is the preset number of shared basic transmission units available to the terminal, and mod represents the remainder operation.

Exemplarily, if the ID of the terminal is 3, N = 10, M = 5, and R = 2, the indexes of the shared basic transmission units corresponding to the terminal are: 3 and 4.

Step 404: Send the data packet to be transmitted to the base station through the determined at least two shared basic transmission units.

It can be seen that, according to the embodiment of the present application, when the system is in the initial time slot, at least two shared basic transmission units corresponding to the terminal are determined according to the first initial mapping rule or the second initial mapping rule, and the determined at least two shared basic transmission units The transmission unit sends the data packet to be transmitted to the base station. In this way, because the terminal can send the data packet to be transmitted to the base station through multiple shared basic transmission units, and the shared basic transmission unit can be used by multiple terminals to send data packets, for a shared basic transmission unit, it can be provided at different times. Different terminals are used; in the semi-persistent scheduling mode, each terminal has exclusive initial transmission resources, and the exclusive initial transmission resources can only be used by one terminal, so applying the embodiments of the present application can increase the frequency of basic transmission units being used To improve resource utilization.

Specifically, the specific processing method of the above step 202 may be:

It is determined that the transmission result in the current time slot is the number of terminals N ₃ that have been successfully transmitted or not transmitted, and the transmission result of the current time slot is the number of terminals N ₁ and N _{2 that} failed in the transmission. Among them, N ₁ is the number of terminals in the current time slot whose transmission result is the first type of transmission failure, and N ₂ is the number of terminals in the current time slot transmission result is the second type of transmission failure.

Then, it is determined that the transmission result of the ID of the terminal in the current time slot is the arrangement position j in the terminal with successful or untransmitted transmission.

For example, the feedback message sent by the base station in the current time slot is: "00, 10, 11, 01, 11, 00", respectively indicating the transmission result of the terminal 1-6, if the terminal ID is 3, the transmission result corresponding to the terminal 3 is obtained "11", the IDs of the terminals whose transmission result is successful or untransmitted are: 1, 3, 5, and 6, respectively, then the transmission position of terminal 3 in the current time slot is the successful or untransmitted terminal. 2.

Then according to the total number of basic transmission units M and the transmission result of the current time slot as the number of terminals that failed to transmit, the number of basic transmission units for sharing M 'is determined by formula (3):

M '＝ MN ₁ -2N ₂ (3)

Among them, M is the total number of basic transmission units, N ₁ is the current time slot transmission result is the number of the first type of transmission failure terminal, N ₂ is the current time slot transmission result is the second type of transmission failure terminal number.

If the number of basic transmission units for sharing M 'is greater than the current time slot, the transmission result is the number of successful or untransmitted terminals N ₃ , then the transmission result in the current time slot according to the terminal ID is the successful or untransmitted transmission Arrangement position j in the terminal, the transmission result of the current time slot is the number of terminals with successful transmission or untransmitted N ₃ , the transmission result of the current time slot is the number of terminals with failed transmission N ₁ and N ₂ , the basic transmission unit for sharing The number M 'and the first preset mapping rule determine at least two shared basic transmission units; wherein, the first preset mapping rule is formula (4):

Among them, j is the arrangement position of the terminal ID in the current time slot transmission result is the successful or untransmitted terminal, M 'is the number of basic transmission units for sharing, and N ₁ is the transmission result of the current time slot. The number of terminals that failed in the first type of transmission. N ₂ is the number of terminals in the current time slot that failed in the second type of transmission. N ₃ is the number of terminals that failed in the current time slot. The number of shared basic transmission units available to the terminal of, mod represents the remainder operation.

For example, the feedback message sent by the base station in the current time slot is: "10, 00, 11, 10, 00, 01, 11", R = 2, M = 10, if the terminal ID is 5, the transmission result corresponding to terminal 5 is obtained "00", the transmission result is that the IDs of the terminals with successful or untransmitted transmissions are: 2, 3, 5, and 7, the transmission result is the ID of the first type of transmission failure: 6, and the transmission result is the second type of transmission The IDs of the failed terminals are: 1 and 4, respectively, and the transmission result of terminal 5 in the current time slot is the arrangement position of the terminal with successful transmission or untransmitted j = 3, N ₁ = 1, N ₂ = 2, N ₃ = 4, M '= 10-1-2 × 2 = 5, according to formula (4), a basic transmission unit index determined by terminal 5 can be obtained as: 3mod5 + 1 + 2 × 2 = 8; since R = 2, it can be It is determined that another basic transmission unit index corresponding to terminal 5 is: (3 + 4) mod5 + 1 + 2 × 2 = 7.

If the number of basic transmission units for sharing M 'is less than or equal to the current time slot, the transmission result is the number of successful or untransmitted terminals N ₃ , then the transmission result in the current time slot according to the terminal ID is the successful or untransmitted The arrangement position j in the terminal, the transmission result of the current time slot is the number of terminals N ₁ and N ₂ that failed to be transmitted, the number of basic transmission units for sharing M ′ and the second preset mapping rule to determine at least two shared basic Transmission unit; wherein, the second preset mapping rule is formula (5):

Among them, j is the arrangement position of the terminal ID in the current time slot transmission result is the successful or untransmitted terminal, M 'is the number of basic transmission units for sharing, and N ₁ is the transmission result of the current time slot. The number of terminals of a type of transmission failure, N ₂ is the number of terminals of the second type of transmission failure in the current time slot transmission result, R is the number of preset shared basic transmission units available for the terminal, and mod represents the remainder operation.

For example, the feedback message sent by the base station in the current time slot is: "11, 00, 11, 10, 00, 01, 11", the terminal ID is 5, R = 2, M = 7, then N ₁ = 1, N ₂ = 1, N ₃ = 5, M ′ = 4, j = 4, and the determined two shared basic transmission unit indexes are: 3 and 4.

It can be seen that, according to the embodiment of the present application, if the transmission result of the last data packet by the terminal is successful or untransmitted, at least two shared basic transmission units are determined according to the first preset mapping rule or the second preset mapping rule , Send data packets to the base station through the determined shared basic transmission unit. In this way, since at least two shared basic transmission units are determined for the transmission result of the last data packet for successful transmission or for the transmitted terminal, the terminal can send the data packet to the base station through the determined at least two basic transmission units, if the same When the data packet is successfully transmitted in different basic transmission units at the same time, the base station obtains the multiplexing gain of the data packet, and the base station can more accurately decode the data packet, thereby improving transmission reliability.

Specifically, the specific processing method of the above step 203 may be:

If the terminal's transmission result of the last data packet is the first type of transmission failure, that is, the transmission result is "01", and the last data packet does not meet the retransmission condition, then the transmission result in the current time slot according to the terminal ID is the first The arrangement position j ′ in the terminal of the first type of transmission failure determines the basic transmission unit with index j ′ as the basic transmission unit exclusively for the terminal. The first type of transmission failure is that the terminal fails to transmit the last packet, and the terminal and The distance between the base stations is less than or equal to the distance threshold.

In the embodiment of the present application, the coverage area of the base station is a circular area with the base station as the center and a radius r, and the distance threshold can be set

If the terminal's transmission result of the last data packet is the second type of transmission failure, that is, the transmission result is "10", and the last data packet does not meet the retransmission condition, then the transmission result in the current time slot according to the terminal ID is the first The arrangement position j ″ in the terminal of the second type of transmission failure, the transmission result of the current time slot is the number of terminals of the first type of transmission failure N ₁ and the transmission result of the current time slot is the number of terminals of the second type of transmission failure N ₂ , will The two basic transmission units with indexes j ″ + N ₁ and j ″ + N ₁ + N ₂ are determined as the basic transmission unit exclusively for the terminal. The second type of transmission failure is that the terminal fails to transmit the last packet, and the terminal and The distance between the base stations is greater than the distance threshold.

In the embodiment of the present application, the transmission of the last data packet fails, which means that the last data packet collided with the data packet sent by other terminals in the shared basic transmission unit. In order to ensure that the terminal succeeds in the next transmission, it needs to be allocated An exclusive basic transmission unit to avoid the collision of the data packets sent by the terminal executing the embodiments of the present application. The second type of transmission failure indicates that the data packet sent by the terminal whose distance from the base station is greater than the distance threshold has collided. It can be understood that the terminal is farther from the base station. In actual applications, the farther the sender is from the base station, the The greater the impact of a data packet on channel fading, the more interference and noise it receives during transmission, making it easier for the base station to decode received data packets. In order to enable the base station to obtain multiplexing gain and improve the reliability of transmission, the terminal whose transmission result is the second type of transmission failure can be assigned two exclusive basic transmission units. However, if two exclusive basic transmission units are allocated to the terminal whose transmission result is transmission failure, the number of basic transmission units used for sharing will be greatly reduced, which is not conducive to improving the resource utilization rate, so when considering resource utilization and transmission For reliability and other reasons, an exclusive basic transmission unit is allocated to a terminal that fails to transmit for a transmission result closer to the base station.

In the embodiment of the present application, the method for the base station to determine the basic transmission unit corresponding to each terminal served by the base station is the same as the method for the terminal to determine the basic transmission unit. After the base station sends a feedback message to each terminal served by the base station, it determines that each terminal The basic transmission unit that can be used when transmitting a data packet. When the terminal next sends a data packet to the base station, the base station can detect the data packet transmitted in each basic transmission unit on the determined basic transmission unit that can be used by each terminal.

It can be seen that in the embodiment of the present application, if the transmission result of the last data packet by the terminal is that the transmission fails and the last data packet does not satisfy the retransmission condition, at least one basic transmission unit exclusively for the terminal is determined according to the terminal ID; The determined at least one basic transmission unit exclusively for the terminal sends the data packet to be transmitted to the base station. Since the retransmission condition is that the data packet has only been sent once and the queuing delay has not been experienced when sending the data packet, that is, the data packet is allowed to reach the base station up to two transmission times, and the prior art data packet fails to be sent, then choose to retransmit Compared with the way until the data packet is successfully sent, applying the embodiment of the present application can reduce the user plane delay.

For example, refer to FIG. 5, which is an exemplary schematic diagram of a data transmission method according to an embodiment of the present application. Assuming that the total number of basic transmission units is M = 10 and the number of terminals served by the base station is N = 10, it is assumed that the distance between the terminal with ID 1-5 and the base station does not exceed the distance threshold, and the distance between the terminal with ID 6-10 and the base station exceeds the distance threshold.

When the terminal first transmits a data packet, the system is in the initial time slot. The ID of the terminal corresponding to each basic transmission unit can be seen in FIG. 5, for example: basic transmission unit 1 can be shared by terminal 1 and terminal 10, and basic transmission unit 2 can For shared use by terminal 2 and terminal 1.

Assume that in the initial time slot, the IDs of the terminals that send data packets to the base station are: 2, 3, 4, 6, 7, 8, and 10, that is, the activated terminals in the initial time slot are: terminal 2, terminal 3, terminal 4, Terminal 6, Terminal 7, Terminal 8, and Terminal 10. After the terminal sends a data packet to the base station and receives the ACK feedback message sent by the base station including the element: "00, 11, 01, 11, 00, 11, 10, 11, 00, 11", you can determine the terminal 2, 4 , 6, 8 and 10 The transmission result of the data packet sent in the initial time slot is successful transmission, and the transmission result of the data packet sent by the terminal 1, 5, and 9 in the initial time slot is untransmitted, then the above transmission result is successful Or the non-transmitted terminal is assigned a shared basic transmission unit. The transmission result of the data packet sent by terminal 3 or terminal 7 in the initial time slot is transmission failure, and the distance between terminal 3 and the base station does not exceed the distance threshold, so terminal 3 corresponds to an exclusive basic transmission unit; terminal 7 and the base station The distance between them exceeds the distance threshold, so the terminal 7 corresponds to two exclusive basic transmission units. The correspondence between the specific terminal and the basic transmission unit is shown in FIG. 5, for example, the terminals corresponding to the basic transmission unit 4 are: terminal 1, terminal 10 and terminal 9. If either terminal 3 or terminal 7 meets the retransmission condition, terminal 3 or terminal 7 will retransmit the unsuccessful initial time slot data packet on the determined exclusive basic transmission unit.

Further, if the result of the terminal's transmission of the last data packet is transmission failure and the last data packet meets the retransmission condition, the method for the terminal to send the data packet to the base station is:

If the terminal's transmission result of the last data packet is the first type of transmission failure, that is, the transmission result is "01", and the last data packet meets the retransmission condition, then the transmission result in the current time slot according to the terminal ID is the first The arrangement position j ′ in the terminal whose class transmission fails, determines the basic transmission unit with index j ′ as the basic transmission unit exclusively for the terminal, and retransmits the last data packet to the base station through the determined basic transmission unit exclusively for the terminal.

If the terminal's transmission result of the last data packet is that the second type of transmission fails, and the last data packet meets the retransmission conditions, the transmission result of the current time slot according to the terminal ID is the arrangement of the terminal of the second type of transmission failure Position j ″, the current time slot transmission result is the number N ₁ of terminals that failed in the first type of transmission and the current time slot transmission result is the number N ₂ of terminals that failed in the second type of transmission, which will be indexed as j ″ + N ₁ and j "The two basic transmission units of + N ₁ + N ₂ are determined as the basic transmission unit exclusively for the terminal, and the last data packet is retransmitted to the base station through the determined two basic transmission units exclusively for the terminal.

It can be seen that, in the embodiment of the present application, if the transmission result of the last data packet by the terminal is that the transmission fails and the last data packet meets the retransmission condition, then at least one basic transmission unit exclusively for the terminal is determined. The basic transmission unit exclusive to the terminal sends a data packet to the base station. Since the transmission of the last data packet fails, it means that the last data packet collided with other data packets on the shared basic transmission unit. At this time, the terminal is assigned an exclusive basic transmission unit, which can prevent the terminal from sending the data packet again. The data packet collides with other data packets, improving transmission reliability.

In the embodiment of the present application, the maximum number of basic transmission units allocated for sharing to the terminal can be determined in the following five ways:

Manner 1: Referring to FIG. 6, FIG. 6 is a graph of the average packet loss rate provided by the embodiment of the present application as a function of the ratio of the number of terminals served by the base station to the total number of basic transmission units. In practical applications, the packet loss rate increases with the increase of the ratio of the number of terminals served by the base station to the total number of basic transmission units N / M, because when the total number of basic transmission units remains unchanged, the number of terminals served by the base station increases. The load will increase. Assume that the traffic frequency is 0.05, that is, the probability that each terminal served by the base station is active in each time slot is 0.05. As can be seen from FIG. 6, when the value of N / M is the same, each terminal serving the base station The larger the maximum number of basic transmission units configured by the terminal, the greater the average packet loss rate. This is because the larger the number of basic transmission units configured for each terminal, the greater the average load of each basic transmission unit. And as shown in FIG. 6, when N / M <1.8, the packet loss rate of configuring up to two basic transmission units for each terminal is approximately equal to the packet loss rate of configuring up to one basic transmission unit for each terminal. To improve resource utilization, you can choose to configure up to two basic transmission units for each terminal.

Among them, the average packet loss rate represents the average number of data packets dropped per time slot to the total number of data packets that need to be sent.

Method two, referring to FIG. 7, when N / M = 1.5, the graph of the average packet loss rate with the flow frequency is shown in FIG. 7. It can be seen from FIG. 7 that the average packet loss rate increases with the increase of the traffic frequency P. When the traffic frequency is the same, the larger the number of basic transmission units configured for each terminal, the greater the packet loss rate. When P <0.13, the packet loss rate of at most two basic transmission units configured for each terminal is approximately equal to the packet loss rate of at most one basic transmission unit configured for each terminal. At this time, in order to improve resource utilization, you can choose Configure up to two basic transmission units for each terminal.

Mode three, referring to FIG. 8, when N / M = 1, the graph of the average packet loss rate with the flow frequency is shown in FIG. 8. It can be seen from FIG. 8 that the average packet loss rate increases with the increase of the traffic frequency P. When the traffic frequency is the same, the greater the number of basic transmission units configured for each terminal, the greater the packet loss rate. Among them, when N / M = 1, when each terminal is configured with at most one basic transmission unit, each user has an exclusive basic transmission unit, so the data packets sent by the terminal will not collide and lose packets The rate is zero (not shown in Figure 8). When P <0.1, the packet loss rate of up to two basic transmission units configured for each terminal is also zero (not shown in FIG. 8). At this time, in order to improve resource utilization, you can choose to configure up to each terminal Two basic transmission units.

Mode 4, referring to FIG. 9, when the traffic frequency P = 0.05, the graph of the average successful multiplexing rate changes with the ratio of the number of terminals served by the base station to the total number of basic transmission units is shown in FIG. It can be seen from Figure 9 that the larger the value of N / M, the lower the average successful multiplexing rate; when N / M≤1, the four curves are approximately coincident, and the average successful multiplexing rate of the four curves is all 90% Above; when N / M> 1, the larger the maximum number of basic transmission units configured for each terminal, the lower the average successful multiplexing rate; if the average successful multiplexing rate is not less than 70%, at this time, in order to increase resources For utilization, you can choose to configure up to two basic transmission units for each terminal.

Among them, the average successful multiplexing rate is the average ratio of the data packets successfully transmitted on multiple basic transmission units per time slot to the data packets that need to be sent. The data packet that needs to be sent is the data packet that arrives at the terminal and needs to be sent to the base station.

Method 5, referring to FIG. 10, when N / M = 1, the graph of the average successful multiplexing rate versus flow frequency is shown in FIG. 10. As can be seen from Figure 10, the greater the traffic frequency, the lower the average successful multiplexing rate; and when configuring up to two basic transmission units for each terminal, the average successful multiplexing rate decreases the slowest; the traffic frequency does not exceed At 0.2, the average successful reuse rate of the four curves is above 50%. At this time, in order to improve resource utilization, you can choose to configure up to two basic transmission units for each terminal.

According to the above five methods for determining the maximum number of basic transmission units configured for each terminal, it can be seen that when the traffic frequency P = 0.05 and N = M, it is possible to choose to configure up to two basic transmission units for each terminal to achieve The average packet loss rate of the data transmission system applying the embodiment of the present invention is 0, and the average successful multiplexing rate is 90%.

Corresponding to the above method embodiment, as shown in FIG. 11, an embodiment of the present application provides a data transmission device, which is applied to a terminal. The device includes: a determination module 1101 and a sending module 1102;

The determining module 1101 is used to determine the transmission result of the terminal to the last data packet; if the transmission result is successful or untransmitted, then at least two are determined according to the terminal's identity ID, the total number of basic transmission units and the preset mapping rules Shared basic transmission unit; if the transmission result is transmission failure and the last data packet does not meet the retransmission condition, then at least one basic transmission unit exclusively for the terminal is determined according to the terminal ID; the retransmission condition is that the data packet has only been sent Once and there is no queuing delay when sending data packets;

The sending module 1102 is configured to send the data packet to be transmitted to the base station through the basic transmission unit determined by the determining module.

Optionally, the device further includes: a judgment module;

The judgment module is used to judge whether the number of terminals served by the base station is less than the total number of basic transmission units if the feedback message containing the transmission result sent by the base station has not been received before sending the data packet to be transmitted;

The determining module 1101 is further configured to determine at least the minimum number of terminals served by the base station according to the terminal ID, the total number of basic transmission units, the number of terminals served by the base station and the first initial mapping rule if the number of terminals served by the base station determined by the determining module is less than Two shared basic transmission units; if the number of terminals served by the base station judged by the judgment module is greater than or equal to the total number of basic transmission units, then according to the terminal ID, the total number of basic transmission units, the number of terminals served by the base station and the second initial mapping rule, Determine at least two shared basic transmission units;

The sending module 1102 is further configured to send the data packet to be transmitted to the base station through at least two shared basic transmission units determined by the determining module.

Optionally, the determination module 1101 is specifically configured to: determine that the transmission result in the current time slot is the number of terminals with successful or untransmitted transmission, and the transmission result in the current time slot is the number of terminals with failed transmission; determine that the terminal ID is in the current The transmission result of the time slot is the arrangement position in the terminal where the transmission is successful or not; according to the total number of basic transmission units and the transmission result of the current time slot is the number of failed transmission terminals, determine the number of basic transmission units for sharing; if used If the number of shared basic transmission units is greater than the current time slot, the transmission result is the number of successful or untransmitted terminals, then the transmission result in the current time slot according to the terminal ID is the arrangement position of the successful or untransmitted terminal, The transmission result of the current time slot is the number of terminals that are successfully transmitted or not transmitted, the transmission result of the current time slot is the number of terminals that failed to be transmitted, the number of basic transmission units for sharing, and the first preset mapping rule to determine at least two sharing Basic transmission unit; if the number of basic transmission units used for sharing is less than or equal to the transmission slot of the current time slot Is the number of terminals that have been successfully transmitted or not transmitted, then the transmission result of the terminal ID in the current time slot is the arrangement position in the terminal of successful or untransmitted transmission, and the transmission result of the current time slot is the number of terminals that failed to be transmitted. The number of shared basic transmission units and the second preset mapping rule determine at least two shared basic transmission units.

Optionally, the determination module 1101 is specifically used to: if the terminal transmits the last data packet as the first type of transmission failure, and the last data packet does not meet the retransmission condition, then the terminal ID is in the current time slot. The transmission result is the arrangement position in the terminal of the first type of transmission failure, and a basic transmission unit for the terminal is determined. The first type of transmission failure is that the terminal fails to transmit the last packet, and the distance between the terminal and the base station is less than or equal to Distance threshold; if the terminal's transmission result of the last data packet is the second type of transmission failure, and the last data packet does not meet the retransmission condition, then the transmission result of the current time slot according to the terminal ID is the second type of transmission failure The arrangement position in the terminal, the transmission result of the current time slot is the number of terminals that failed in the first type of transmission and the transmission result of the current time slot is the number of terminals that failed in the second type of transmission. Determine two basic transmission units for exclusive use by the terminal. The second type of transmission failure is that the terminal fails to transmit the last data packet, and the distance between the terminal and the base station is greater than the distance threshold.

Optionally, the device further includes: a first retransmission module and a second retransmission module;

The first retransmission module is used to transmit the last data packet as the first type of transmission failure, and the last data packet meets the retransmission condition, according to the terminal ID transmission result in the current time slot is the first The arrangement position of the terminal that failed to transmit similarly, determine a basic transmission unit exclusively for the terminal, and retransmit the last data packet to the base station through the determined basic transmission unit exclusively for the terminal;

The second retransmission module is used to transmit the result of the second type of transmission of the last data packet to the terminal is failed, and the last data packet meets the retransmission conditions, the transmission result of the current time slot according to the terminal ID is the second The arrangement position of the terminal that failed to transmit similarly, the transmission result of the current time slot is the number of terminals that failed in the first type of transmission, and the transmission result of the current time slot is the number of terminals that failed in the second type of transmission. The transmission unit retransmits the last data packet to the base station through the determined two basic transmission units exclusively for the terminal.

An embodiment of the present application further provides an electronic device, as shown in FIG. 12, including a processor 1201, a communication interface 1202, a memory 1203, and a communication bus 1204, where the processor 1201, the communication interface 1202, and the memory 1203 pass through the communication bus 1204 Complete communication with each other,

Memory 1203, used to store computer programs;

The processor 1201 is configured to implement the steps executed by the terminal in the foregoing method embodiments when executing the program stored in the memory 1203.

The communication bus mentioned in the above electronic device may be a peripheral component interconnection standard (Peripheral Component Interconnect, PCI) bus or an extended industry standard structure (Extended Industry Standard Architecture, EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, and a control bus. For ease of representation, the figure is only represented by a thick line, but it does not mean that there is only one bus or one type of bus.

The communication interface is used for communication between the electronic device and other devices.

The memory may include random access memory (Random Access Memory, RAM), or non-volatile memory (Non-Volatile Memory, NVM), for example, at least one disk memory. Optionally, the memory may also be at least one storage device located away from the foregoing processor.

The aforementioned processor may be a general-purpose processor, including a central processor (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc .; it may also be a digital signal processor (Digital Signal Processing, DSP), dedicated integration Circuit (Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.

In yet another embodiment provided by the present application, a computer-readable storage medium is also provided. The computer-readable storage medium stores a computer program, and the computer program is executed by a processor to implement any of the above data transmission methods. A step of.

In yet another embodiment provided by the present application, a computer program product containing instructions is also provided, which, when it runs on a computer, causes the computer to execute any data transmission method in the above embodiments.

In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions according to the embodiments of the present application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server or data center Transmit to another website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including a server, a data center, and the like integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, Solid State Disk (SSD)) or the like.

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 that these entities or operations There is any such actual relationship or order. Moreover, the terms "include", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also those not explicitly listed Or other elements that are inherent to this process, method, article, or equipment. Without more restrictions, the element defined by the sentence "include one ..." does not exclude that there are other identical elements in the process, method, article or equipment that includes the element.

The embodiments in this specification are described in a related manner. The same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant part can be referred to the description of the method embodiment.

The above are only the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application are included in the scope of protection of this application.

Claims (13)

1. A data transmission method characterized by being applied to a terminal, the method includes:

   Determine the transmission result of the last data packet by the terminal;

   If the transmission result is successful or untransmitted, at least two shared basic transmission units are determined according to the terminal's identity ID, the total number of basic transmission units, and preset mapping rules;

   If the transmission result is transmission failure and the last data packet does not satisfy the retransmission condition, then at least one basic transmission unit exclusively for the terminal is determined according to the terminal ID; the retransmission condition is a data packet It has only been sent once and the data packet was sent without queuing delay;

   Sending the data packet to be transmitted to the base station through the determined basic transmission unit.
2. The method according to claim 1, wherein the method further comprises:

   If the feedback message containing the transmission result sent by the base station has not been received before sending the data packet to be transmitted, it is determined whether the number of terminals served by the base station is less than the total number of basic transmission units;

   If the number of terminals served by the base station is less than the total number of basic transmission units, at least two are determined according to the ID of the terminal, the total number of basic transmission units, the number of terminals served by the base station and the first initial mapping rule Shared basic transmission unit;

   If the number of terminals served by the base station is greater than or equal to the total number of basic transmission units, then according to the ID of the terminal, the total number of basic transmission units, the number of terminals served by the base station and the second initial mapping rule, determine at least Two shared basic transmission units;

   Sending the data packet to be transmitted to the base station through the determined at least two shared basic transmission units.
3. The method according to claim 1, characterized in that, if the transmission result is that the transmission is successful or not transmitted, then according to the terminal's identity ID, the total number of basic transmission units, and a preset mapping rule, determine at least Two shared basic transmission units, including:

   Determine that the transmission result in the current time slot is the number of terminals with successful or untransmitted transmission, and the transmission result in the current time slot is the number of terminals with failed transmission;

   Determining the arrangement position of the ID of the terminal in the current time slot transmission result is a terminal that is successfully transmitted or not transmitted;

   Determine the number of basic transmission units for sharing based on the total number of basic transmission units and the number of terminals that failed to transmit based on the transmission result of the current time slot;

   If the number of basic transmission units for sharing is greater than the number of terminals in the current time slot whose transmission result is successful or untransmitted, the transmission result in the current time slot according to the terminal ID is transmission successful or unsuccessful The arrangement position in the transmitted terminals, the transmission result of the current time slot is the number of terminals that have been successfully transmitted or not transmitted, the transmission result of the current time slot is the number of terminals that failed to be transmitted, and the basic transmission unit for sharing The quantity and the first preset mapping rule determine at least two shared basic transmission units;

   If the number of basic transmission units used for sharing is less than or equal to the number of terminals in the current time slot whose transmission result is successful or untransmitted, the transmission result in the current time slot according to the ID of the terminal is transmission successful or not The arrangement position in the transmitted terminals, the transmission result of the current time slot is the number of terminals that failed to transmit, the number of shared basic transmission units and the second preset mapping rule, to determine at least two shared basic transmission units .
4. The method according to claim 3, wherein if the transmission result is that the transmission fails and the last data packet does not satisfy the retransmission condition, then at least one for the terminal is determined according to the ID of the terminal The basic transmission unit exclusive to the terminal includes:

   If the transmission result of the last data packet by the terminal is that the first type of transmission fails, and the last data packet does not satisfy the retransmission condition, the transmission result in the current time slot according to the terminal ID is the first The arrangement position of a terminal of a type of transmission failure determines a basic transmission unit exclusively for the terminal, the first type of transmission failure is the failure of the terminal to transmit the last packet, and the terminal and the base station The distance between is less than or equal to the distance threshold;

   If the transmission result of the last data packet by the terminal is that the second type of transmission fails, and the last data packet does not satisfy the retransmission condition, the transmission result in the current time slot according to the terminal ID is the first The arrangement position of the terminal of the second type of transmission failure, the transmission result of the current time slot is the number of terminals of the first type of transmission failure and the transmission result of the current time slot is the number of terminals of the second type of transmission failure, and two terminals are determined for the terminal For an exclusive basic transmission unit, the second type of transmission failure is that the terminal fails to transmit the last data packet, and the distance between the terminal and the base station is greater than the distance threshold.
5. The method according to claim 4, wherein the method further comprises:

   If the transmission result of the last data packet by the terminal is that the first type of transmission fails, and the last data packet meets the retransmission condition, the transmission result in the current time slot according to the terminal ID is the first Arranging positions in the terminal where the class transmission fails, determining a basic transmission unit exclusively for the terminal, and retransmitting the previous data packet to the base station through the determined basic transmission unit exclusively for the terminal;

   If the transmission result of the last data packet by the terminal is that the second type of transmission fails, and the last data packet meets the retransmission condition, the transmission result in the current time slot according to the terminal ID is the second The arrangement position of the terminals that failed to transmit similarly, the transmission result of the current time slot is the number of terminals that failed to transmit in the first category, and the transmission result of the current time slot is the number of terminals that failed to transmit in the second category. The basic transmission unit exclusively for the terminal retransmits the last data packet to the base station through the determined two basic transmission units exclusively for the terminal.
6. A data transmission device, characterized in that it is applied to a terminal, the device includes:

   The determining module is used to determine the transmission result of the terminal to the last data packet; if the transmission result is successful or untransmitted, according to the terminal's identity ID, the total number of basic transmission units and preset mapping rules , Determine at least two shared basic transmission units; if the transmission result is transmission failure and the last data packet does not satisfy the retransmission condition, then determine at least one basic base for exclusive use by the terminal according to the terminal ID Transmission unit; the retransmission condition is that the data packet has only been sent once and the data packet has not been subjected to queuing delay;

   The sending module is configured to send the data packet to be transmitted to the base station through the basic transmission unit determined by the determining module.
7. The device according to claim 6, wherein the device further comprises: a judgment module;

   The judging module is used to judge whether the number of terminals served by the base station is less than the total number of basic transmission units if the feedback message containing the transmission result sent by the base station has not been received before sending the data packet to be transmitted Quantity

   The determining module is further configured to: if the number of terminals served by the base station determined by the determining module is less than the total number of basic transmission units, based on the terminal ID, the total number of basic transmission units, the base station The number of service terminals and the first initial mapping rule to determine at least two shared basic transmission units; if the number of terminals served by the base station judged by the judgment module is greater than or equal to the total number of basic transmission units, according to the terminal ID, the total number of basic transmission units, the number of terminals served by the base station, and the second initial mapping rule, determine at least two shared basic transmission units;

   The sending module is further configured to send the data packet to be transmitted to the base station through at least two shared basic transmission units determined by the determining module.
8. The device according to claim 6, characterized in that

   The determination module is specifically configured to: determine that the transmission result in the current time slot is the number of terminals with successful or untransmitted transmission, and the transmission result in the current time slot is the number of terminals with failed transmission; determine that the ID of the terminal is at the current time The transmission result of the slot is the arrangement position in the terminal with successful or untransmitted transmission; according to the total number of basic transmission units and the transmission result of the current time slot is the number of terminals with failed transmission, determine the number of basic transmission units for sharing ; If the number of basic transmission units for sharing is greater than the number of terminals in the current time slot whose transmission result is successful or untransmitted, the transmission result in the current time slot according to the terminal ID is transmission successful or Arrangement position among untransmitted terminals, the transmission result of the current time slot is the number of terminals with successful transmission or untransmitted, the transmission result of the current time slot is the number of terminals with failed transmission, and the basic transmission for sharing The number of units and the first preset mapping rule determine at least two shared basic transmission units; if the basic transmission is used for sharing If the number of units is less than or equal to the current time slot, the transmission result is the number of successful or untransmitted terminals. According to the terminal ID, the transmission result in the current time slot is the position and location of the successful or untransmitted terminal The transmission result of the current time slot is the number of terminals that failed to transmit, the number of basic transmission units for sharing and the second preset mapping rule, and at least two shared basic transmission units are determined.
9. The device according to claim 8, characterized in that

   The determining module is specifically configured to: according to the ID of the terminal, if the result of the terminal ’s transmission of the last data packet is that the first type of transmission fails and the previous data packet does not satisfy the retransmission condition The transmission result of the current time slot is the arrangement position in the terminal of the first type of transmission failure, and a basic transmission unit exclusively for the terminal is determined. The first type of transmission failure is that the terminal fails to transmit the last packet , And the distance between the terminal and the base station is less than or equal to the distance threshold; if the result of the terminal ’s transmission of the last data packet is type 2 transmission failure, and the previous data packet does not satisfy the retransmission Conditions, then the transmission result of the ID of the terminal in the current time slot is the arrangement position of the terminal of the second type of transmission failure, the transmission result of the current time slot is the number of terminals of the first type of transmission failure and the transmission of the current time slot The result is the number of terminals of the second type of transmission failure, and two basic transmission units exclusively for the terminal are determined. The second type of transmission failure is that the terminal transmits the last packet Lost, and the distance between the terminal and the base station is greater than the distance threshold.
10. The apparatus according to claim 9, wherein the apparatus further comprises: a first retransmission module and a second retransmission module;

    The first retransmission module is configured to: if the transmission result of the last data packet by the terminal is that the first type of transmission fails, and the last data packet satisfies the retransmission condition, according to the terminal ID The transmission result of the current time slot is the arrangement position of the terminal of the first type of transmission failure, determine a basic transmission unit exclusively for the terminal, and retransmit to the base station through the determined basic transmission unit exclusively for the terminal The previous data packet;

    The second retransmission module is configured to: if the transmission result of the last data packet by the terminal is that the second type of transmission fails, and the last data packet meets the retransmission condition, according to the terminal ID The transmission result in the current time slot is the arrangement position in the terminal of the second type of transmission failure, the transmission result of the current time slot is the number of terminals of the first type of transmission failure, and the transmission result of the current time slot is the second type For the number of terminals that failed to transmit, determine two basic transmission units exclusively for the terminal, and retransmit the previous data packet to the base station through the determined two basic transmission units exclusively for the terminal.
11. An electronic device, characterized in that it includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory complete communication with each other through the communication bus;

    Memory, used to store computer programs;

    The processor, when used to execute the program stored on the memory, implements the method steps of any one of claims 1-5.
12. A computer-readable storage medium, characterized in that a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the method steps of any one of claims 1-5 are realized.
13. A computer program product, characterized in that, when it runs on a computer, it causes the computer to execute the method steps of any one of claims 1-5.

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