CN109450602B - Data transmission method and device and electronic equipment - Google Patents

Data transmission method and device and electronic equipment Download PDF

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Publication number
CN109450602B
CN109450602B CN201811217565.XA CN201811217565A CN109450602B CN 109450602 B CN109450602 B CN 109450602B CN 201811217565 A CN201811217565 A CN 201811217565A CN 109450602 B CN109450602 B CN 109450602B
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transmission
terminal
data packet
basic
result
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CN109450602A (en
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田辉
聂高峰
肖佳莉
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Institute Of Sensing Technology And Business Beijing University Of Posts And Telecommunication
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Institute Of Sensing Technology And Business Beijing University Of Posts And Telecommunication
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Priority to PCT/CN2018/118128 priority patent/WO2020077752A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals

Abstract

The embodiment of the invention provides a data transmission method, a data transmission device and electronic equipment, relates to the technical field of communication, and can reduce user plane time delay on the basis of ensuring resource utilization rate, wherein the embodiment of the application comprises the following steps: determining the transmission result of the last data packet by the terminal; if the transmission result is successful transmission or non-transmission, determining at least two shared basic transmission units according to the ID of the terminal, the total number of the basic transmission units and a preset mapping rule; if the transmission result is transmission failure and the last data packet does not meet the retransmission condition, determining at least one basic transmission unit exclusively occupied by the terminal according to the ID of the terminal; wherein, the retransmission condition is that the data packet is transmitted only once and the data packet is transmitted without experiencing queuing delay; and then transmitting the data packet to be transmitted to the base station through the determined basic transmission unit.

Description

Data transmission method and device and electronic equipment
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a data transmission method and apparatus, and an electronic device.
Background
In order to meet the delay index of Low-delay and high-reliability communication (URLLC), an uplink authorization-free transmission scheme is proposed at present, that is, in the uplink transmission process, a terminal can directly transmit uplink data on a preconfigured resource, and the process of the terminal sending a resource scheduling request to a base station is omitted. Compared with the traditional authorization transmission scheme, the uplink authorization-free transmission scheme saves the time of resource request and authorization and reduces the time delay of a user plane. Meanwhile, considering that the URLLC supports machine type communication, the number of users is large, in order to increase the system capacity, a Sparse Code Multiple Access (SCMA) technique may be introduced into the uplink authorization-free system, and data packets sent by Multiple user equipments are transmitted on the same resource by Code domain multiplexing. 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 cancelled, the terminal cannot know the resources for the initial transmission and the retransmission of the data packet. In order to solve this problem, in the prior art, a semi-persistent scheduling mode is generally adopted to configure an initial transmission resource for each terminal served by a base station, and configure a shared retransmission resource for each group of terminals. However, in practical applications, the number of terminals sending data packets to the base station is much smaller than the number of all terminals served by the base station, and the initial transmission resource and the retransmission resource allocated to the terminals may not be actually used, which may cause a large amount of resource waste, so that resource utilization and user plane delay cannot be considered when URLLC communication is implemented at present.
Disclosure of Invention
The embodiment of the invention aims to provide a data transmission method, a data transmission device and electronic equipment, so as to reduce user plane time delay on the basis of ensuring resource utilization rate. The specific technical scheme is as follows:
in a first aspect, a data transmission method is provided, and is applied to a terminal, where the method includes:
determining the transmission result of the last data packet by the terminal;
if the transmission result is successful transmission or non-transmission, determining at least two shared basic transmission units according to the identity ID of the terminal, the total number of the basic transmission units and a preset mapping rule;
if the transmission result is transmission failure and the last data packet does not meet the retransmission condition, determining at least one basic transmission unit exclusively occupied by the terminal according to the ID of the terminal; the retransmission condition is that the data packet is sent only once and the data packet is sent without experiencing queuing delay;
and sending the data packet to be transmitted to a base station through the determined basic transmission unit.
Optionally, the method further includes:
if a feedback message containing a transmission result sent by the base station is not received before the data packet to be transmitted is sent, judging whether the number of terminals served by the base station is less than the total number of the basic transmission units;
if the number of the terminals served by the base station is less than the total number of the basic transmission units, determining at least two shared basic transmission units according to the ID of the terminal, the total number of the basic transmission units, the number of the terminals served by the base station and a first initial mapping rule;
if the number of the terminals served by the base station is larger than or equal to the total number of the basic transmission units, determining at least two shared basic transmission units according to the ID of the terminal, the total number of the basic transmission units, the number of the terminals served by the base station and a second initial mapping rule;
and 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 transmission or non-transmission, determining at least two shared basic transmission units according to the identity ID of the terminal, the total number of basic transmission units, and a preset mapping rule, including:
determining the number of terminals with successful or non-successful transmission as the transmission result of the current time slot and the number of terminals with failed transmission as the transmission result of the current time slot;
determining the arrangement position of the ID of the terminal in the terminal with successful transmission or non-transmission in the transmission result of the current time slot;
determining the number of basic transmission units for sharing according to the total number of the basic transmission units and the number of the terminals with failed transmission of the transmission result of the current time slot;
if the number of the basic transmission units for sharing is larger than the number of the terminals with successful transmission or non-transmission as the transmission result of the current time slot, determining at least two shared basic transmission units according to the arrangement position of the ID of the terminal in the terminal with successful transmission or non-transmission as the transmission result of the current time slot, the number of the terminals with failed transmission as the transmission result of the current time slot, the number of the basic transmission units for sharing and a first preset mapping rule;
and if the number of the basic transmission units used for sharing is less than or equal to the number of the terminals with successful or non-successful transmission in the transmission result of the current time slot, determining at least two shared basic transmission units according to the arrangement position of the ID of the terminal in the terminal with successful or non-successful transmission in the transmission result of the current time slot, the number of the terminals with failed transmission in the transmission result of the current time slot, the number of the basic transmission units used for sharing and a second preset mapping rule.
Optionally, if the transmission result is transmission failure and the previous data packet does not satisfy the retransmission condition, determining at least one basic transmission unit exclusively owned by the terminal according to the ID of the terminal, including:
if the transmission result of the last data packet by the terminal is a first-class transmission failure and the last data packet does not meet the retransmission condition, determining a basic transmission unit exclusively occupied by the terminal according to the arrangement position of the ID of the terminal in the terminal with the transmission result of the current time slot being the first-class transmission failure, wherein the first-class transmission failure is the transmission failure of the last data packet by the terminal and the distance between the terminal and the base station is smaller than or equal to a distance threshold value;
if the transmission result of the last data packet by the terminal is the second type transmission failure and the last data packet does not meet the retransmission condition, determining two basic transmission units exclusively occupied by the terminal according to the arrangement position of the ID of the terminal in the terminal with the current time slot transmission result of the second type transmission failure, the number of the terminals with the current time slot transmission result of the first type transmission failure and the number of the terminals with the current time slot transmission result of the second type transmission failure, wherein the second type transmission failure is the transmission failure of the last data packet by the terminal, 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 the first-class transmission failure and the last data packet meets the retransmission condition, determining a basic transmission unit exclusively occupied by the terminal according to the arrangement position of the ID of the terminal in the terminal with the transmission result of the current time slot being the first-class transmission failure, and retransmitting the last data packet to the base station through the determined basic transmission unit exclusively occupied by the terminal;
if the transmission result of the terminal to the last data packet is the second type transmission failure and the last data packet meets the retransmission condition, determining two basic transmission units exclusively occupied by the terminal according to the arrangement position of the ID of the terminal in the terminal with the current time slot transmission result of the second type transmission failure, the number of the terminals with the current time slot transmission result of the first type transmission failure and the number of the terminals with the current time slot transmission result of the second type transmission failure, and retransmitting the last data packet to the base station through the determined two basic transmission units exclusively occupied by the terminal.
In a second aspect, a data transmission apparatus is provided, which is applied to a terminal, and the apparatus includes:
a determining module, configured to determine a transmission result of the last data packet by the terminal; if the transmission result is successful transmission or non-transmission, determining at least two shared basic transmission units according to the identity ID of the terminal, the total number of the basic transmission units and a preset mapping rule; if the transmission result is transmission failure and the last data packet does not meet the retransmission condition, determining at least one basic transmission unit exclusively occupied by the terminal according to the ID of the terminal; the retransmission condition is that the data packet is sent only once and the data packet is sent without experiencing queuing delay;
and the sending module is used for sending the data packet to be transmitted to the base station through the basic transmission unit determined by the determining module.
Optionally, the apparatus further comprises: a judgment module;
the determining module is configured to determine whether the number of terminals served by the base station is less than the total number of the basic transmission units if a feedback message including a transmission result sent by the base station is not received before the data packet to be transmitted is sent;
the determining module is further configured to determine at least two shared basic transmission units according to the ID of the terminal, the total number of the basic transmission units, the number of the terminals served by the base station, and a first initial mapping rule, if the number of the terminals served by the base station, which is determined by the determining module, is less than the total number of the basic transmission units; if the number of the terminals served by the base station is greater than or equal to the total number of the basic transmission units, the judgment module determines at least two shared basic transmission units according to the ID of the terminal, the total number of the basic transmission units, the number of the terminals served by the base station and a second initial mapping rule;
the sending module is further configured to send the data packet to be transmitted to the base station through the at least two shared basic transmission units determined by the determining module.
Optionally, the determining module is specifically configured to: determining the number of terminals with successful or non-successful transmission as the transmission result of the current time slot and the number of terminals with failed transmission as the transmission result of the current time slot; determining the arrangement position of the ID of the terminal in the terminal with successful transmission or non-transmission in the transmission result of the current time slot; determining the number of basic transmission units for sharing according to the total number of the basic transmission units and the number of the terminals with failed transmission of the transmission result of the current time slot; if the number of the basic transmission units for sharing is larger than the number of the terminals with successful transmission or non-transmission as the transmission result of the current time slot, determining at least two shared basic transmission units according to the arrangement position of the ID of the terminal in the terminal with successful transmission or non-transmission as the transmission result of the current time slot, the number of the terminals with failed transmission as the transmission result of the current time slot, the number of the basic transmission units for sharing and a first preset mapping rule; and if the number of the basic transmission units used for sharing is less than or equal to the number of the terminals with successful or non-successful transmission in the transmission result of the current time slot, determining at least two shared basic transmission units according to the arrangement position of the ID of the terminal in the terminal with successful or non-successful transmission in the transmission result of the current time slot, the number of the terminals with failed transmission in the transmission result of the current time slot, the number of the basic transmission units used for sharing and a second preset mapping rule.
Optionally, the determining module is specifically configured to: if the transmission result of the last data packet by the terminal is a first-class transmission failure and the last data packet does not meet the retransmission condition, determining a basic transmission unit exclusively occupied by the terminal according to the arrangement position of the ID of the terminal in the terminal with the transmission result of the current time slot being the first-class transmission failure, wherein the first-class transmission failure is the transmission failure of the last data packet by the terminal and the distance between the terminal and the base station is smaller than or equal to a distance threshold value; if the transmission result of the last data packet by the terminal is the second type transmission failure and the last data packet does not meet the retransmission condition, determining two basic transmission units exclusively occupied by the terminal according to the arrangement position of the ID of the terminal in the terminal with the current time slot transmission result of the second type transmission failure, the number of the terminals with the current time slot transmission result of the first type transmission failure and the number of the terminals with the current time slot transmission result of the second type transmission failure, wherein the second type transmission failure is the transmission failure of the last data packet by the terminal, and the distance between the terminal and the base station is greater than the distance threshold.
Optionally, the apparatus further comprises: the device comprises a first retransmission module and a second retransmission module;
the first retransmission module is configured to determine a basic transmission unit exclusively owned by the terminal according to an arrangement position of the ID of the terminal in the terminal whose transmission result in the current time slot is the first type transmission failure if the transmission result of the last data packet by the terminal is the first type transmission failure and the last data packet satisfies the retransmission condition, and retransmit the last data packet to the base station through the determined basic transmission unit exclusively owned by the terminal;
and the second retransmission module is configured to determine two basic transmission units for exclusive use by the terminal according to an arrangement position of the ID of the terminal in the terminal with the second type of transmission failure as the transmission result of the current time slot, the number of terminals with the first type of transmission failure as the transmission result of the current time slot, and the number of terminals with the second type of transmission failure as the transmission result of the current time slot, if the transmission result of the last data packet by the terminal is the second type of transmission failure and the last data packet satisfies the retransmission condition, and retransmit the last data packet to the base station through the determined two basic transmission units for exclusive use by the terminal.
In a third aspect, an electronic device is provided, which 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;
a memory for storing a computer program;
and the processor is used for realizing the steps of any data transmission method when executing the program stored in the memory.
In a fourth aspect, the present invention also provides a computer-readable storage medium, in which a computer program is stored, and the computer program, when executed by a processor, implements the steps of any of the data transmission methods described above.
In a fifth aspect, embodiments of the present invention also provide a computer program product containing instructions, which when run on a computer, cause the computer to perform any of the data transmission methods described above.
According to the data transmission method, the data transmission device and the electronic equipment provided by the embodiment of the invention, the shared basic transmission unit can be determined by the terminal, namely the terminal can send the data packet to be transmitted to the base station through the plurality of shared basic transmission units, the shared basic transmission unit can be used by the plurality of terminals to send the data packet, and as the data packet of the URLLC has the characteristic of sporadic arrival, the shared basic transmission units used by different terminals in different time slots cannot collide with each other. In addition, because the exclusive basic transmission unit is determined for the terminal with the previous data packet transmission failure, the terminal is ensured not to collide again when sending the current data packet, and compared with the mode that after the data packet is sent in failure, retransmission is selected until the data packet is sent successfully in the prior art, the method and the device for transmitting the data packet can reduce the user plane time delay. Therefore, the adoption of the embodiment of the invention can realize the reduction of the user plane time delay on the basis of ensuring the resource utilization rate by adjusting the available basic transmission unit of the terminal in real time according to the transmission result of the last data packet.
Of course, not all of the advantages described above need to be achieved at the same time in the practice of any one product or method of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a data transmission system according to an embodiment of the present invention;
fig. 2 is a flowchart of a data transmission method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a basic transmission unit division according to an embodiment of the present invention;
fig. 4 is a flowchart of another data transmission method according to an embodiment of the present invention;
fig. 5 is an exemplary diagram of a data transmission method according to an embodiment of the present invention;
fig. 6 is a graph of the variation of the average packet loss rate with the ratio of the number of terminals served by the base station to the total number of basic transmission units according to the embodiment of the present invention;
fig. 7 is a graph illustrating a variation of an average packet loss rate with a traffic frequency according to an embodiment of the present invention;
fig. 8 is a graph of another average packet loss rate varying with traffic frequency according to an embodiment of the present invention;
fig. 9 is a graph of average successful reuse rate as a function of the number of terminals served by a base station and the total number of basic transmission units according to an embodiment of the present invention;
FIG. 10 is a graph of average successful reuse rate versus traffic frequency provided by an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The data transmission method provided by the embodiment of the invention can be applied to a data transmission system shown in fig. 1, and the system comprises: a terminal and a base station. The terminal can be a mobile phone, a computer, a wearable device and other terminals with wireless communication functions.
The terminal is used for sending a data packet to be transmitted to the base station and receiving a feedback message sent by the base station.
The base station is used for sending a feedback message to the terminal served by the base station after receiving the data packet sent by at least one terminal.
Referring to fig. 1, a data transmission method provided in an embodiment of the present invention is applied to a terminal, and as shown in fig. 2, the method includes the following steps:
step 201, determining the transmission result of the terminal for the last data packet.
In one implementation, the terminal determines the transmission result of the previous data packet through a feedback message sent by the base station and received in the current time slot. Wherein the transmission result comprises: successful transmission, failed transmission, and non-transmission.
The transmission failure comprises a first type transmission failure and a second type transmission failure, the first type transmission failure means that the terminal fails to transmit the last data packet, and the distance between the terminal and the base station is less than or equal to a distance threshold value, which indicates that weak retransmission needs to be performed on the last data packet. The second type of transmission failure refers to 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, which indicates that the last data packet needs to be strongly retransmitted.
For example, after receiving the signal sent by the terminal, the base station may broadcast an Acknowledgement (ACK) message to all terminals served by the base station, where the ACK message may be an N-dimensional column vector and may include a feedback message from the base station to each terminal served by the base station, and N is the number of terminals served by the base station.
Each element in the vector may be represented by a two-bit symbol, e.g., Xn00 indicates that terminal n has not transmitted a packet. XnThe value of 01 indicates that the distance between the terminal n and the base station is less than or equal to the distance threshold, and the last data packet transmitted by the terminal n fails to be transmitted, and needs to be weakly retransmitted. XnThe value of 10 indicates that the distance between the terminal n and the base station is greater than the distance threshold, and the last data packet transmitted by the terminal n fails to be transmitted, and a strong retransmission is required. Xn11 indicates that the last data packet sent by terminal n was successfully transmitted.
Further, the terminal may send a data packet to the base station at every preset time slot. For example, the preset time slot may be 1 time slot or 3 time slots.
The transmission success indicates that the data packet transmitted by the terminal on the determined at least one basic transmission unit is successfully transmitted; the transmission failure indicates that the data packets sent by the terminal on the determined basic transmission unit all collide; the non-transmission indicates that the terminal does not send a data packet on the determined basic transmission unit, or the terminal does not transmit on at least one determined basic transmission unit and fails to transmit on the rest 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 transmitted by the terminal on the basic transmission unit 1 is successfully transmitted and the data packet transmitted on the basic transmission unit 3 is failed to be transmitted, the data packet transmitted by the terminal 5 is successfully transmitted.
If the data packets sent by the terminal 5 on both the basic transmission unit 1 and the basic transmission unit 3 fail to be transmitted, the data packets sent by the terminal 5 fail to be transmitted.
If the basic transmission unit 1 is shareable for terminals 1, 2 and 3, the basic transmission unit 2 is shareable for terminals 1 and 2. Assuming that the terminals 2 and 3 send data packets to the base station in the same time slot, the data packets of the terminal 2 and the terminal 3 on the basic transmission unit 1 collide, the data packet transmission of the terminal 2 on the basic transmission unit 2 succeeds, and since the collision occurs in the basic transmission unit 1, the base station cannot know which data packets sent by the terminals collide, and therefore, it is considered that the data packets sent by the terminals 1, 2, and 3 in the basic transmission unit 1 all collide. The data packet transmitted by the terminal 2 in the basic transmission unit 2 is successfully transmitted, so that it is determined that the terminal 1 does not transmit the data packet in the basic transmission unit 2. The base station will feed back to terminals 1, 2 and 3: the terminal 1 does not transmit the data packet, the data packet transmitted by the terminal 2 is successfully transmitted, and the data packet transmitted by the terminal 3 is failed to be transmitted.
Step 202, if the transmission result is successful transmission or non-transmission, determining at least two shared basic transmission units according to the identity ID of the terminal, the total number of the basic transmission units and a preset mapping rule.
In one implementation, if the transmission result of the last data packet by the terminal is successful transmission or non-transmission, the preset number of shared basic transmission units is determined according to the arrangement position, the total number of basic transmission units, and the preset mapping rule of the terminal whose transmission result is the arrangement position in the terminal that is successful transmission or non-transmission in the feedback message sent by the base station and received by the current time slot by the IDentity (ID) of the terminal. Illustratively, the preset number may be 2 or 3.
The shared basic transmission unit can be used by the terminal sending the data packet to be transmitted, and can also be used by other terminals distributed with the basic transmission unit. For example, the shared basic transmission unit 1 may be shared by the terminals 1 and 2, and the shared basic transmission unit 2 may be shared by the terminals 1 and 3. In the embodiment of the present invention, if a plurality of terminals transmit data packets on the same basic transmission unit at the same time, the data packets transmitted on the basic transmission unit may collide, and the transmission result of these terminals in the feedback message of the base station is transmission failure. On the contrary, if the terminal 1 and the terminal 2 transmit the data packets to the base station through the basic transmission unit 1 in different time slots, the data packets transmitted by the terminal 1 and the terminal 2 through the basic transmission unit 1 will not collide.
Step 203, 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 occupied by the terminal according to the ID of the terminal.
Wherein, the retransmission condition is that the data packet is transmitted only once and the data packet is transmitted without experiencing queuing delay.
If the terminal needs to send a data packet a, the terminal has other data packets to be sent before sending the data packet a, or has other data packets to be retransmitted, and needs to wait for sending the data packet a after sending other data packets, that is, the data packet a needs to experience queuing delay.
In one implementation mode, if the transmission result of the last data packet by the terminal is transmission failure, judging whether the last data packet meets retransmission conditions; if the retransmission condition is met, determining at least one exclusive basic transmission unit for sending the previous data packet according to the ID of the terminal; and if the retransmission condition is not met, determining at least one exclusive basic transmission unit for sending the data packet to be transmitted according to the ID of the terminal.
Optionally, in order to support Low-latency high-reliability communication (URLLC), it is ensured that the user plane latency does not exceed 1 millisecond, if the terminal waits for the transmission time of a data packet before sending the data packet a, the data packet a can only be primarily transmitted once. If the terminal waits for the transmission time of two data packets before transmitting the data packet a, the data packet is not transmitted to the base station.
And step 204, sending the data packet to be transmitted to the base station through the determined basic transmission unit.
In one implementation, if there are a plurality of determined basic transmission units, the data packet to be transmitted is sent to the base station through each basic transmission unit.
In the data transmission method provided by the embodiment of the invention, the shared basic transmission unit can be determined by the terminal, namely the terminal can send the data packet to be transmitted to the base station through the plurality of shared basic transmission units, and the shared basic transmission unit can be used by the plurality of terminals to send the data packet. In addition, because the exclusive basic transmission unit is determined for the terminal with the previous data packet transmission failure, the terminal is ensured not to collide again when sending the current data packet, and compared with the mode that after the data packet is sent in failure, retransmission is selected until the data packet is sent successfully in the prior art, the method and the device for transmitting the data packet can reduce the user plane time delay. Therefore, the adoption of the embodiment of the invention can realize the reduction of the user plane time delay on the basis of ensuring the resource utilization rate by adjusting the available basic transmission unit of the terminal in real time according to the transmission result of the last data packet.
In the embodiment of the present application, the total number of basic transmission units is determined according to uplink resources that can be used by a base station for a terminal.
Optionally, the SCMA technology is used to divide the basic transmission units, in the SCMA technology, bit streams of data are mapped to code words for transmission, N orthogonal resources can generate C different codebooks, one terminal corresponds to one codebook, so that the N orthogonal resources can support data of the C terminals to be transmitted by being superimposed thereon, after introducing the codebook multiplexing technology, L pilot sequences correspond to one codebook, and one codebook corresponds to L terminals, so that the 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.
Wherein the content of the first and second substances,
Figure BDA0001833926140000111
k represents the number of non-zero entities in a codeword.
Before step 201, if the system is in the initial time slot, and no terminal served by the base station transmits a data packet to the base station by using the method of the embodiment of the present application, it can also be understood that before sending the data packet to be transmitted, the terminal does not receive a feedback message including a transmission result sent by the base station, and then sends the data packet to be transmitted to the base station by using the method shown in fig. 4, specifically including 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 timeslot, 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, go to step 402; if N is greater than or equal to M, go to step 403.
Step 402, if the number of terminals served by the base station is smaller than the total number of basic transmission units, determining at least two shared basic transmission units 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.
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, R shared basic transmission units are determined according to a first initial mapping rule, that is, formula (1):
Figure BDA0001833926140000121
wherein, 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 number of shared basic transmission units available for the preset terminal, mod represents the remainder operation.
For example, if the ID of the terminal is 3, N is 5, M is 10, and R is 2, then a basic transmission unit index determined by the terminal 3 may be obtained according to formula (1) as follows: 3mod10 — 3; since R ═ 2, another basic transmission unit index corresponding to terminal 3 can be determined as: (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, determining at least two shared basic transmission units 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.
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, R shared basic transmission units are determined according to a second initial mapping rule, that is, formula (2):
Figure BDA0001833926140000122
wherein, ID is the ID of the terminal, M is the number of basic transmission units, R is the number of preset shared basic transmission units available to the terminal, mod represents the remainder operation.
For example, if the ID of the terminal is 3, N is 10, M is 5, and R is 2, the index of the shared basic transmission unit corresponding to the terminal is: 3 and 4.
And step 404, sending 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, when the system is in the initial time slot, according to the first initial mapping rule or the second initial mapping rule, at least two shared basic transmission units corresponding to the terminal are determined, and the data packet to be transmitted is sent to the base station through the determined at least two shared basic transmission units. Therefore, the terminal can send the data packet to be transmitted to the base station through the plurality of shared basic transmission units, and the shared basic transmission units can be used for the plurality of terminals to send the data packet; in the semi-persistent scheduling mode, each terminal has an exclusive initial transmission resource, and the exclusive initial transmission resource can be used by only one terminal, so that the frequency of the basic transmission unit can be increased and the resource utilization rate is increased by applying the embodiment of the invention.
Specifically, the specific processing manner of step 202 may be:
determining the number N of terminals with successful or non-transmission result in the current time slot3And the transmission result of the current time slot is the number N of terminals with transmission failure1And N2. Wherein N is1Number of terminals failing transmission of the first class as a result of transmission of the current time slot, N2And the transmission result of the current time slot is the number of the terminals with the failed second-type transmission.
Then, it is determined that the transmission result of the ID of the terminal in the current slot is the permutation position j in the terminal whose transmission is successful or not.
For example: the feedback message sent by the current time slot base station is: "00, 10, 11, 01, 11, 00" respectively represents the transmission results of the terminals 1 to 6, if the ID of the terminal is 3, the transmission result "11" corresponding to the terminal 3 is obtained, and the IDs of the terminals with successful transmission or non-transmission as the transmission result are respectively: 1. 3, 5, and 6, the permutation position of the terminal 3 in the terminal whose transmission result of the current slot is transmission success or non-transmission is 2.
And then according to the total number M of the basic transmission units and the number of the terminals with failed transmission which is the transmission result of the current time slot, determining the number M' of the basic transmission units for sharing by a formula (3):
M'＝M-N1-2N2(3)
wherein M is the total number of basic transmission units, N1Number of terminals failing transmission of the first class as a result of transmission of the current time slot, N2And the transmission result of the current time slot is the number of the terminals with the failed second-type transmission.
If used for shared basic transmission listThe number of elements M' is greater than the number N of terminals with successful or non-transmission result of the current time slot3Then, the arrangement position j in the terminal with successful transmission or non-transmission is determined according to the transmission result of the ID of the terminal in the current time slot, and the number N of the terminals with successful transmission or non-transmission is determined according to the transmission result of the current time slot3The transmission result of the current time slot is the number N of the terminals with transmission failure1And N2Determining at least two shared basic transmission units by using the number M' of the basic transmission units for sharing and a first preset mapping rule; wherein, the first preset mapping rule is formula (4):
Figure BDA0001833926140000141
wherein j is the arrangement position of the ID of the terminal in the terminal with successful transmission or non-transmission in the transmission result of the current time slot, M' is the number of the basic transmission units for sharing, N1Number of terminals failing transmission of the first class as a result of transmission of the current time slot, N2The number of terminals with failed transmission of the second type, N, is the transmission result of the current time slot3And R is the number of shared basic transmission units available for the preset terminal, and mod represents the remainder operation.
For example, the feedback message sent by the base station in the current time slot is: if the ID of the terminal is 5, "00" is obtained for the terminal 5, and the transmission result "00" is obtained for the terminal whose transmission is successful or not, the IDs of the terminals whose transmission is successful or not are: 2. 3, 5 and 7, the ID of the terminal with the transmission result of the first type of transmission failure is: and 6, the ID of the terminal with the transmission result of the second type of transmission failure is respectively as follows: 1 and 4, the terminal 5 has 3, N permutation positions j in the terminal whose transmission result in the current time slot is successful or not1＝1，N2＝2，N3One basic transmission unit index determined by the terminal 5 can be obtained according to equation (4) as follows: 3mod5+1+2 × 2 ═ 8; since R ═ 2, another basic transmission unit index corresponding to the terminal 5 can be determined as:(3+4)mod5+1+2×2＝7。
if the number M' of the basic transmission units used for sharing is less than or equal to the number N of the terminals with successful transmission or non-transmission as the transmission result of the current time slot3Then, the arrangement position j in the terminal with successful transmission or non-transmission according to the transmission result of the ID of the terminal in the current time slot and the number N of the terminals with failed transmission according to the transmission result of the current time slot1And N2Determining at least two shared basic transmission units by using the number M' of the basic transmission units for sharing and a second preset mapping rule; wherein the second preset mapping rule is formula (5):
Figure BDA0001833926140000151
wherein j is the arrangement position of the ID of the terminal in the terminal with successful transmission or non-transmission in the transmission result of the current time slot, M' is the number of the basic transmission units for sharing, N1Number of terminals failing transmission of the first class as a result of transmission of the current time slot, N2And R is the number of the terminals with the transmission result of the current time slot being the second type of transmission failure, R is the number of the shared basic transmission units available for the preset terminals, 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 ID of the terminal is 5, R is 2, M is 10, N is1＝1，N2＝1，N 35, M' is 4, j is 4, and the two shared basic transmission unit indexes are determined as follows: 3 and 4.
It can be seen that, with the embodiment of the present invention, if the transmission result of the last data packet by the terminal is transmission success or non-transmission, at least two shared basic transmission units are determined according to the first preset mapping rule or the second preset mapping rule, and the data packet is sent to the base station through the determined shared basic transmission unit. Therefore, as the transmission result of the previous data packet is the transmission success or at least two shared basic transmission units are determined 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 data packet is transmitted successfully in different basic transmission units at the same time, the base station obtains the multiplexing gain of the data packet, the base station can decode the data packet more accurately, and the transmission reliability is improved.
Specifically, the specific processing manner of step 203 may be:
if the transmission result of the last data packet by the terminal is the first-class transmission failure, namely the transmission result is '01', and the last data packet does not meet the retransmission condition, determining the basic transmission unit with the index of j 'as the basic transmission unit exclusive for the terminal according to the arrangement position j' of the ID of the terminal in the terminal with the transmission result of the current time slot being the first-class transmission failure, wherein the first-class transmission failure is the transmission failure of the last data packet by the terminal, and the distance between the terminal and the base station is smaller than or equal to the distance threshold.
In the embodiment of the present invention, the coverage area of the base station is a circular area with the radius r and the base station as the center, and the distance threshold may be set as
Figure BDA0001833926140000152
If the transmission result of the last data packet by the terminal is the second type of transmission failure, namely the transmission result is ' 10 ', and the last data packet does not meet the retransmission condition, the arrangement position j ' of the terminal in the second type of transmission failure terminal is the transmission result of the current time slot according to the ID of the terminal, and the number N of the terminals with the first type of transmission failure is the transmission result of the current time slot1And the number N of the terminals with the transmission result of the current time slot being the second type transmission failure2Index j "+ N1And j "+ N1+N2The two basic transmission units are determined as the basic transmission units exclusively occupied by the terminal, the second type of transmission failure is the transmission failure of the terminal to the last data packet, and the distance between the terminal and the base station is greater than the distance threshold.
In the embodiment of the present invention, a transmission failure of a previous packet indicates that the previous packet collides with a packet sent by another terminal in a shared basic transmission unit, and in order to ensure that the next transmission of the terminal is successful, an exclusive basic transmission unit needs to be allocated to the terminal, so as to avoid a situation that the packet sent by the terminal according to the embodiment of the present invention collides again. The second type of transmission failure indicates that a data packet sent by a terminal, whose distance from the base station is greater than a distance threshold value, is collided, and it can be understood that the terminal is farther from the base station, and in practical application, the farther the sending end is from the base station, the more the sent data packet is affected by channel fading, the more interference and noise are received during transmission, so that the base station is more likely to fail in decoding the received data packet. In order to obtain multiplexing gain for the base station and improve the reliability of transmission, two exclusive basic transmission units can be allocated to the terminal with the transmission result of the second type of transmission failure. 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 is greatly reduced, which is not beneficial to improving the resource utilization rate, so that an exclusive basic transmission unit is allocated to the terminal whose transmission result is transmission failure, which is closer to the base station, in consideration of the resource utilization rate, transmission reliability and other reasons.
In the embodiment of the present invention, a method for a base station to determine a basic transmission unit corresponding to each terminal served by the base station is the same as the method for the terminal to determine a basic transmission unit, after the base station sends a feedback message to each terminal served by the base station, the base station determines a basic transmission unit usable by each terminal when the terminal transmits a data packet next time, and when the terminal transmits a data packet to the base station next time, the base station may detect the data packet transmitted in each basic transmission unit on the determined basic transmission unit usable by each terminal.
It can be seen that, in the embodiment of the present invention, if the transmission result of the previous data packet by the terminal is transmission failure and the previous data packet does not satisfy the retransmission condition, at least one basic transmission unit exclusively occupied by the terminal is determined according to the ID of the terminal; and sending the data packet to be transmitted to the base station through the determined at least one basic transmission unit exclusively occupied by the terminal. Because the retransmission condition is that the data packet is sent only once and the queuing delay is not experienced when the data packet is sent, that is, the data packet is allowed to reach the base station by the time of two transmissions at most, compared with the mode of selecting retransmission until the data packet is successfully sent after the data packet is failed in the prior art, the method and the device for retransmitting the data packet can reduce the user plane delay.
Exemplarily, referring to fig. 5, fig. 5 is an exemplary schematic diagram of a data transmission method according to an embodiment of the present invention. Assuming that the total number M of the basic transmission units is 10, the number N of terminals served by the base station is 10, assuming 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 initially transmits a data packet, the system is in the initial timeslot, and the ID of the terminal corresponding to each basic transmission unit can be seen in fig. 5, for example: the basic transmission unit 1 is shared by the terminal 1 and the terminal 10, and the basic transmission unit 2 is shared by the terminal 2 and the terminal 1.
Assume that, in the initial time slot, the ID of the terminal that sends a packet to the base station is: 2. 3, 4, 6, 7, 8 and 10, i.e. the active terminals of 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, the received ACK feedback message sent by the base station comprises the following elements: "00, 11, 01, 11, 00, 11, 10, 11, 00, 11", it may be determined that the transmission result of the data packet sent by the terminals 2, 4, 6, 8, and 10 in the initial time slot is transmission success, and the transmission result of the data packet sent by the terminals 1, 5, and 9 in the initial time slot is non-transmission, and then the shared basic transmission unit is allocated to the terminals whose transmission result is transmission success or non-transmission. The transmission result of the data packet sent by the terminal 3 or the terminal 7 in the initial time slot is transmission failure, and the distance between the terminal 3 and the base station does not exceed the distance threshold, so the terminal 3 corresponds to an exclusive basic transmission unit; the distance between the terminal 7 and the base station exceeds a distance threshold, so the terminal 7 corresponds to two exclusive basic transmission units. The specific correspondence between the 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 both the terminal 3 and the terminal 7 satisfy the retransmission condition, both the terminal 3 and the terminal 7 will retransmit the data packet whose initial timeslot was not successfully transmitted on the determined exclusive basic transmission unit.
Further, if the transmission result of the last data packet by the terminal 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 as follows:
if the transmission result of the last data packet by the terminal is the first type transmission failure, namely the transmission result is '01', and the last data packet meets the retransmission condition, determining the basic transmission unit with the index of j 'as the basic transmission unit exclusive for the terminal according to the arrangement position j' of the ID of the terminal in the terminal with the transmission result of the current time slot being the first type transmission failure, and retransmitting the last data packet to the base station through the determined basic transmission unit exclusive for the terminal.
If the transmission result of the last data packet by the terminal is the second type of transmission failure and the last data packet meets the retransmission condition, the arrangement position j' of the second type of transmission failure terminal is the transmission result of the current time slot according to the ID of the terminal, and the number N of the first type of transmission failure terminals is the transmission result of the current time slot1And the number N of the terminals with the transmission result of the current time slot being the second type transmission failure2Index j "+ N1And j "+ N1+N2The two basic transmission units are determined as the basic transmission units exclusively owned by the terminal, and a data packet is retransmitted to the base station through the two determined basic transmission units exclusively owned by the terminal.
It can be seen that, in the embodiment of the present invention, if the transmission result of the last data packet by the terminal is transmission failure and the last data packet satisfies the retransmission condition, at least one basic transmission unit exclusively occupied by the terminal is determined, and the data packet is sent to the base station in the determined at least one basic transmission unit exclusively occupied by the terminal. The transmission failure of the previous data packet indicates that the previous data packet collides with other data packets on the shared basic transmission unit, and the exclusive basic transmission unit is allocated to the terminal at the moment, so that the data packet can be prevented from colliding with other data packets when the terminal sends the data packet again, and the transmission reliability is improved.
In the embodiment of the present invention, the number of basic transmission units for sharing, which is most allocated to a terminal, may be determined in the following five ways:
first, referring to fig. 6, fig. 6 is a graph illustrating the variation of the average packet loss rate with the ratio of the number of terminals served by the base station to the total number of basic transmission units according to the embodiment of the present invention. In practical applications, the packet loss rate increases with the increase of the ratio N/M between the number of terminals served by the base station and the total number of basic transmission units, because the number of terminals served by the base station increases and the load of the system increases when the total number of basic transmission units is not changed. Assuming that the traffic frequency is 0.05, that is, the probability that each terminal served by the base station is in an active state in each timeslot is 0.05, it can be seen from fig. 6 that, when the values of N/M are the same, the larger the number of the basic transmission units configured at most for each terminal served by the base station is, the larger the average packet loss ratio is, because the larger the number of the basic transmission units configured for each terminal is, the larger the average load per basic transmission unit is. As shown in fig. 6, when N/M is less than 1.8, the packet loss ratio of configuring at most two basic transmission units for each terminal is approximately equal to the packet loss ratio of configuring at most one basic transmission unit for each terminal, and at this time, to improve the resource utilization rate, it may be selected to configure at most two basic transmission units for each terminal.
The average packet loss rate represents the proportion of the number of discarded packets per timeslot to the total number of packets to be transmitted.
In the second mode, referring to fig. 7, when N/M is 1.5, a graph of the average packet loss rate with the traffic frequency is shown in fig. 7. As can be seen from fig. 7, the average packet loss rate increases with the increase of the traffic frequency P, and the greater the number of basic transmission units configured for each terminal at most, the greater the packet loss rate. When P is less than 0.13, the packet loss ratio of configuring at most two basic transmission units for each terminal is approximately equal to the packet loss ratio of configuring at most one basic transmission unit for each terminal, and at this time, to improve the resource utilization rate, it may be selected to configure at most two basic transmission units for each terminal.
Mode three, referring to fig. 8, when N/M is 1, a graph of the average packet loss rate with the traffic frequency is shown in fig. 8. As can be seen from fig. 8, the average packet loss rate increases with the increase of the traffic frequency P, and the greater the number of basic transmission units configured for each terminal at most, the greater the packet loss rate. When N/M is equal to 1, and when a maximum of one basic transmission unit is configured for each terminal, each user has one exclusive basic transmission unit, so that data packets sent by the terminals do not collide, and the packet loss rate is zero (not shown in fig. 8). When P is less than 0.1, the packet loss rate of configuring at most two basic transmission units for each terminal is also zero (not shown in fig. 8), and at this time, to improve the resource utilization rate, it may be selected to configure at most two basic transmission units for each terminal.
In a fourth mode, referring to fig. 9, when the traffic frequency P is 0.05, a graph of the average successful reuse rate as a function of the ratio of the number of terminals served by the base station to the total number of basic transmission units is shown in fig. 9. As can be seen from FIG. 9, the larger the value of N/M, the lower the average successful reuse rate; when N/M is less than or equal to 1, the four curves are approximately superposed, and the average successful multiplexing rate of the four curves is more than 90%; when N/M is greater than 1, the larger the number of the basic transmission units which are configured for each terminal at most is, the lower the average successful reuse rate is; if the average successful reuse rate is not less than 70%, at this time, to improve the resource utilization rate, it may be selected to configure at most two basic transmission units for each terminal.
The average successful reuse rate is the proportion of data packets which are transmitted successfully on a plurality of basic transmission units in each time slot to the data packets which need to be transmitted. The data packet to be transmitted is a data packet which arrives at the terminal and needs to be transmitted to the base station.
In a fifth mode, referring to fig. 10, when N/M is 1, a graph of the average successful reuse rate according to the traffic frequency is shown in fig. 10. As can be seen from fig. 10, the larger the traffic frequency, the lower the average successful reuse rate; when at most two basic transmission units are configured for each terminal, the average successful multiplexing rate is slowest to decrease; when the flow rate frequency is not more than 0.2, the average successful multiplexing rate of the four curves is more than 50%. At this time, in order to improve the resource utilization rate, it may be selected to configure at most two basic transmission units for each terminal.
According to the five methods for determining the maximum number of configured basic transmission units for each terminal, it can be seen that when the traffic frequency P is 0.05 and N is M, two maximum basic transmission units are selected to be configured for each terminal, so that the average packet loss rate of the data transmission system applying the embodiment of the present invention is 0, and the average successful reuse rate is 90%.
Corresponding to the above method embodiment, as shown in fig. 11, an embodiment of the present invention provides a data transmission apparatus, which is applied to a terminal, and includes: a determining module 1101 and a sending module 1102;
a determining module 1101, configured to determine a transmission result of the terminal for the previous data packet; if the transmission result is successful transmission or non-transmission, determining at least two shared basic transmission units according to the identity ID of the terminal, the total number of the basic transmission units and a preset mapping rule; if the transmission result is transmission failure and the last data packet does not meet the retransmission condition, determining at least one basic transmission unit exclusively occupied by the terminal according to the ID of the terminal; the retransmission condition is that the data packet is transmitted only once and the data packet is transmitted without experiencing queuing delay;
a sending module 1102, 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 apparatus further comprises: a judgment module;
the judging module is used for judging whether the number of the terminals served by the base station is less than the total number of the basic transmission units or not if the feedback message containing the transmission result sent by the base station is not received before the data packet to be transmitted is sent;
the determining module 1101 is further configured to determine, if the number of terminals served by the base station determined by the determining module is smaller than the total number of the basic transmission units, at least two shared basic transmission units according to the ID of the terminal, the total number of the basic transmission units, the number of terminals served by the base station, and the first initial mapping rule; if the number of the terminals served by the base station is larger than or equal to the total number of the basic transmission units, the judgment module determines at least two shared basic transmission units according to the ID of the terminal, the total number of the basic transmission units, the number of the terminals served by the base station and a second initial mapping rule;
the sending module 1102 is further configured to send the data packet to be transmitted to the base station through the at least two shared basic transmission units determined by the determining module.
Optionally, the determining module 1101 is specifically configured to: determining the number of terminals with successful or non-successful transmission as the transmission result of the current time slot and the number of terminals with failed transmission as the transmission result of the current time slot; determining the arrangement position of the ID of the terminal in the terminal with successful or non-successful transmission in the transmission result of the current time slot; determining the number of basic transmission units for sharing according to the total number of the basic transmission units and the number of terminals with failed transmission of the transmission result of the current time slot; if the number of the basic transmission units used for sharing is larger than the number of the terminals with successful transmission or non-transmission as the transmission result of the current time slot, determining at least two shared basic transmission units according to the arrangement position of the ID of the terminal in the terminal with successful transmission or non-transmission as the transmission result of the current time slot, the number of the terminals with failed transmission as the transmission result of the current time slot, the number of the basic transmission units used for sharing and a first preset mapping rule; and if the number of the basic transmission units used for sharing is less than or equal to the number of the terminals with successful or non-successful transmission in the transmission result of the current time slot, determining at least two shared basic transmission units according to the arrangement position of the ID of the terminal in the terminal with successful or non-successful transmission in the transmission result of the current time slot, the number of the terminals with failed transmission in the transmission result of the current time slot, the number of the basic transmission units used for sharing and a second preset mapping rule.
Optionally, the determining module 1101 is specifically configured to: if the transmission result of the last data packet by the terminal is the first-class transmission failure and the last data packet does not meet the retransmission condition, determining a basic transmission unit exclusively occupied by the terminal according to the arrangement position of the ID of the terminal in the terminal with the transmission result of the current time slot being the first-class transmission failure, wherein the first-class transmission failure is the transmission failure of the last data packet by the terminal and the distance between the terminal and the base station is less than or equal to the distance threshold value; if the transmission result of the last data packet by the terminal is the second type transmission failure and the last data packet does not meet the retransmission condition, determining two basic transmission units exclusively occupied by the terminal according to the arrangement position of the ID of the terminal in the terminal with the current time slot transmission result of the second type transmission failure, the number of the terminals with the current time slot transmission result of the first type transmission failure and the number of the terminals with the current time slot transmission result of the second type transmission failure, wherein the second type transmission failure is the transmission failure of the last data packet by the terminal, and the distance between the terminal and the base station is greater than the distance threshold.
Optionally, the apparatus further comprises: the device comprises a first retransmission module and a second retransmission module;
the first retransmission module is used for determining a basic transmission unit exclusively occupied by the terminal according to the arrangement position of the ID of the terminal in the terminal with the transmission result of the current time slot being the first type transmission failure if the transmission result of the last data packet by the terminal is the first type transmission failure and the last data packet meets the retransmission condition, and retransmitting the last data packet to the base station through the determined basic transmission unit exclusively occupied by the terminal;
and the second retransmission module is used for determining two basic transmission units exclusive for the terminal according to the arrangement position of the ID of the terminal in the terminal with the current time slot transmission result of the second type of transmission failure, the number of the terminals with the current time slot transmission result of the first type of transmission failure and the number of the terminals with the current time slot transmission result of the second type of transmission failure if the transmission result of the last data packet by the terminal is the second type of transmission failure and the last data packet meets the retransmission condition, and retransmitting the last data packet to the base station through the determined two basic transmission units exclusive for the terminal.
An embodiment of the present invention 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 complete mutual communication through the communication bus 1204,
a memory 1203 for storing a computer program;
the processor 1201 is configured to implement the steps executed by the terminal in the foregoing method embodiment when executing the program stored in the memory 1203.
The communication bus mentioned in the electronic device may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
The communication interface is used for communication between the electronic equipment and other equipment.
The Memory may include a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component.
In yet another embodiment provided by the present invention, a computer-readable storage medium is further provided, in which a computer program is stored, and the computer program realizes the steps of any one of the above data transmission methods when executed by a processor.
In a further embodiment, the present invention also provides a computer program product containing instructions which, when run on a computer, cause the computer to perform any of the data transmission methods of the above embodiments.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may 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 loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (10)

1. A data transmission method, applied to a terminal, the method comprising:
determining the transmission result of the last data packet by the terminal;
if the transmission result is successful transmission or non-transmission, determining at least two shared basic transmission units according to the identity ID of the terminal, the total number of the basic transmission units and a preset mapping rule;
if the transmission result is transmission failure and the last data packet does not meet the retransmission condition, determining at least one basic transmission unit exclusively occupied by the terminal according to the ID of the terminal; the retransmission condition is that the data packet is sent only once and the data packet is sent without experiencing queuing delay;
and sending the data packet to be transmitted to the base station through the determined basic transmission unit.
2. The method of claim 1, further comprising:
if a feedback message containing a transmission result sent by the base station is not received before the data packet to be transmitted is sent, judging whether the number of terminals served by the base station is less than the total number of the basic transmission units;
if the number of the terminals served by the base station is less than the total number of the basic transmission units, determining at least two shared basic transmission units according to the ID of the terminal, the total number of the basic transmission units, the number of the terminals served by the base station and a first initial mapping rule;
if the number of the terminals served by the base station is larger than or equal to the total number of the basic transmission units, determining at least two shared basic transmission units according to the ID of the terminal, the total number of the basic transmission units, the number of the terminals served by the base station and a second initial mapping rule;
and 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, wherein if the transmission result is successful transmission or non-transmission, determining at least two shared basic transmission units according to the identity ID of the terminal, the total number of basic transmission units, and a preset mapping rule, comprises:
determining the number of terminals with successful or non-successful transmission as the transmission result of the current time slot and the number of terminals with failed transmission as the transmission result of the current time slot;
determining the arrangement position of the ID of the terminal in the terminal with successful transmission or non-transmission in the transmission result of the current time slot;
determining the number of basic transmission units for sharing according to the total number of the basic transmission units and the number of the terminals with failed transmission of the transmission result of the current time slot;
if the number of the basic transmission units for sharing is larger than the number of the terminals with successful transmission or non-transmission as the transmission result of the current time slot, determining at least two shared basic transmission units according to the arrangement position of the ID of the terminal in the terminal with successful transmission or non-transmission as the transmission result of the current time slot, the number of the terminals with failed transmission as the transmission result of the current time slot, the number of the basic transmission units for sharing and a first preset mapping rule;
and if the number of the basic transmission units used for sharing is less than or equal to the number of the terminals with successful or non-successful transmission in the transmission result of the current time slot, determining at least two shared basic transmission units according to the arrangement position of the ID of the terminal in the terminal with successful or non-successful transmission in the transmission result of the current time slot, the number of the terminals with failed transmission in the transmission result of the current time slot, the number of the basic transmission units used for sharing and a second preset mapping rule.
4. The method of claim 3, wherein the determining at least one basic transmission unit exclusively owned by the terminal according to the ID of the terminal if the transmission result is transmission failure and the previous data packet does not satisfy the retransmission condition comprises:
if the transmission result of the last data packet by the terminal is a first-class transmission failure and the last data packet does not meet the retransmission condition, determining a basic transmission unit exclusively occupied by the terminal according to the arrangement position of the ID of the terminal in the terminal with the transmission result of the current time slot being the first-class transmission failure, wherein the first-class transmission failure is the transmission failure of the last data packet by the terminal and the distance between the terminal and the base station is smaller than or equal to a distance threshold value;
if the transmission result of the last data packet by the terminal is the second type transmission failure and the last data packet does not meet the retransmission condition, determining two basic transmission units exclusively occupied by the terminal according to the arrangement position of the ID of the terminal in the terminal with the current time slot transmission result of the second type transmission failure, the number of the terminals with the current time slot transmission result of the first type transmission failure and the number of the terminals with the current time slot transmission result of the second type transmission failure, wherein the second type transmission failure is the transmission failure of the last data packet by the terminal, and the distance between the terminal and the base station is greater than the distance threshold.
5. The method of claim 4, further comprising:
if the transmission result of the last data packet by the terminal is the first-class transmission failure and the last data packet meets the retransmission condition, determining a basic transmission unit exclusively occupied by the terminal according to the arrangement position of the ID of the terminal in the terminal with the transmission result of the current time slot being the first-class transmission failure, and retransmitting the last data packet to the base station through the determined basic transmission unit exclusively occupied by the terminal;
if the transmission result of the terminal to the last data packet is the second type transmission failure and the last data packet meets the retransmission condition, determining two basic transmission units exclusively occupied by the terminal according to the arrangement position of the ID of the terminal in the terminal with the current time slot transmission result of the second type transmission failure, the number of the terminals with the current time slot transmission result of the first type transmission failure and the number of the terminals with the current time slot transmission result of the second type transmission failure, and retransmitting the last data packet to the base station through the two determined basic transmission units exclusively occupied by the terminal.
6. A data transmission apparatus, applied to a terminal, the apparatus comprising:
a determining module, configured to determine a transmission result of the last data packet by the terminal; if the transmission result is successful transmission or non-transmission, determining at least two shared basic transmission units according to the identity ID of the terminal, the total number of the basic transmission units and a preset mapping rule; if the transmission result is transmission failure and the last data packet does not meet the retransmission condition, determining at least one basic transmission unit exclusively occupied by the terminal according to the ID of the terminal; the retransmission condition is that the data packet is sent only once and the data packet is sent without experiencing queuing delay;
and the sending module is used for sending the data packet to be transmitted to the base station through the basic transmission unit determined by the determining module.
7. The apparatus of claim 6, further comprising: a judgment module;
the determining module is configured to determine whether the number of terminals served by the base station is less than the total number of the basic transmission units if a feedback message including a transmission result sent by the base station is not received before the data packet to be transmitted is sent;
the determining module is further configured to determine at least two shared basic transmission units according to the ID of the terminal, the total number of the basic transmission units, the number of the terminals served by the base station, and a first initial mapping rule, if the number of the terminals served by the base station, which is determined by the determining module, is less than the total number of the basic transmission units; if the number of the terminals served by the base station is greater than or equal to the total number of the basic transmission units, the judgment module determines at least two shared basic transmission units according to the ID of the terminal, the total number of the basic transmission units, the number of the terminals served by the base station and a second initial mapping rule;
the sending module is further configured to send the data packet to be transmitted to the base station through the at least two shared basic transmission units determined by the determining module.
8. The apparatus of claim 6,
the determining module is specifically configured to: determining the number of terminals with successful or non-successful transmission as the transmission result of the current time slot and the number of terminals with failed transmission as the transmission result of the current time slot; determining the arrangement position of the ID of the terminal in the terminal with successful transmission or non-transmission in the transmission result of the current time slot; determining the number of basic transmission units for sharing according to the total number of the basic transmission units and the number of the terminals with failed transmission of the transmission result of the current time slot; if the number of the basic transmission units for sharing is larger than the number of the terminals with successful transmission or non-transmission as the transmission result of the current time slot, determining at least two shared basic transmission units according to the arrangement position of the ID of the terminal in the terminal with successful transmission or non-transmission as the transmission result of the current time slot, the number of the terminals with failed transmission as the transmission result of the current time slot, the number of the basic transmission units for sharing and a first preset mapping rule; and if the number of the basic transmission units used for sharing is less than or equal to the number of the terminals with successful or non-successful transmission in the transmission result of the current time slot, determining at least two shared basic transmission units according to the arrangement position of the ID of the terminal in the terminal with successful or non-successful transmission in the transmission result of the current time slot, the number of the terminals with failed transmission in the transmission result of the current time slot, the number of the basic transmission units used for sharing and a second preset mapping rule.
9. The apparatus of claim 8,
the determining module is specifically configured to: if the transmission result of the last data packet by the terminal is a first-class transmission failure and the last data packet does not meet the retransmission condition, determining a basic transmission unit exclusively occupied by the terminal according to the arrangement position of the ID of the terminal in the terminal with the transmission result of the current time slot being the first-class transmission failure, wherein the first-class transmission failure is the transmission failure of the last data packet by the terminal and the distance between the terminal and the base station is smaller than or equal to a distance threshold value; if the transmission result of the last data packet by the terminal is the second type transmission failure and the last data packet does not meet the retransmission condition, determining two basic transmission units exclusively occupied by the terminal according to the arrangement position of the ID of the terminal in the terminal with the current time slot transmission result of the second type transmission failure, the number of the terminals with the current time slot transmission result of the first type transmission failure and the number of the terminals with the current time slot transmission result of the second type transmission failure, wherein the second type transmission failure is the transmission failure of the last data packet by the terminal, and the distance between the terminal and the base station is greater than the distance threshold.
10. The apparatus of claim 9, further comprising: the device comprises a first retransmission module and a second retransmission module;
the first retransmission module is configured to determine a basic transmission unit exclusively owned by the terminal according to an arrangement position of the ID of the terminal in the terminal whose transmission result in the current time slot is the first type transmission failure if the transmission result of the last data packet by the terminal is the first type transmission failure and the last data packet satisfies the retransmission condition, and retransmit the last data packet to the base station through the determined basic transmission unit exclusively owned by the terminal;
and the second retransmission module is configured to determine two basic transmission units for exclusive use by the terminal according to an arrangement position of the ID of the terminal in the terminal with the second type of transmission failure as the transmission result of the current time slot, the number of terminals with the first type of transmission failure as the transmission result of the current time slot, and the number of terminals with the second type of transmission failure as the transmission result of the current time slot, if the transmission result of the last data packet by the terminal is the second type of transmission failure and the last data packet satisfies the retransmission condition, and retransmit the last data packet to the base station through the determined two basic transmission units for exclusive use by the terminal.
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