CN111480308B - Data transmission method, equipment and computer storage medium - Google Patents
Data transmission method, equipment and computer storage medium Download PDFInfo
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- CN111480308B CN111480308B CN201880076810.1A CN201880076810A CN111480308B CN 111480308 B CN111480308 B CN 111480308B CN 201880076810 A CN201880076810 A CN 201880076810A CN 111480308 B CN111480308 B CN 111480308B
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- 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
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
Abstract
The embodiment of the invention provides a data transmission method, data transmission equipment and a computer storage medium; the method can comprise the following steps: when data is sent, a first timer is started; and determining whether to perform HARQ retransmission to the data receiving end according to the feedback information sent by the data receiving end and the state of the first timer. By the technical scheme of the embodiment of the invention, the data transmission based on the HARQ mechanism can be realized aiming at the V2X technology.
Description
Technical Field
The embodiment of the invention relates to the technical field of wireless communication, in particular to a data transmission method, data transmission equipment and a computer storage medium.
Background
The vehicle networking system adopts a Long Term Evolution (LTE) -Device-to-Device (D2D, Device to Device) -based Sidelink (SL, Sidelink) transmission technology, and is different from a mode that communication data is received or sent by a base station in a traditional LTE system, and the vehicle networking system adopts a terminal-to-terminal direct communication mode, so that the vehicle networking system has higher spectral efficiency and lower transmission delay.
Vehicle networking technology (V2X, Vehicle-to-event) is standardized in the third Generation Partnership Project (3 GPP) Rel-14, defining two modes of transmission: mode 3 and mode 4. In mode 3, the transmission resources of the terminal are allocated by the base station. In mode 4, the terminal determines the transmission resource by listening (sensing) + reserving (reservation).
In the current car networking system, a Hybrid Automatic Repeat reQuest (HARQ) mechanism based on the feedback of the receiving end cannot be supported, so that it is a problem to be solved for the V2X technology to implement data transmission based on the HARQ mechanism.
Disclosure of Invention
Embodiments of the present invention are intended to provide a method, device, and computer storage medium for data transmission.
The technical scheme of the embodiment of the invention can be realized as follows:
in a first aspect, an embodiment of the present invention provides a data transmission method, including:
when data is sent, a first timer is started; and determining whether to perform HARQ retransmission to the data receiving end according to the feedback information sent by the data receiving end and the state of the first timer.
In a second aspect, an embodiment of the present invention provides a data transmission method, including:
after receiving the data, starting a second timer;
determining a first reception state of the data;
and determining whether to attempt to send first feedback information within the timing time of the second timer according to the first receiving state.
In a third aspect, an embodiment of the present invention provides a data sending end device, including a sending part, a first timer control part, and a first determination part; wherein the transmitting section is configured to transmit data;
the first timer control part is configured to start a first timer when the transmitting part transmits data;
the first determining part is configured to determine whether to perform HARQ retransmission to the data receiving end according to feedback information sent by the data receiving end and the state of the first timer.
In a fourth aspect, an embodiment of the present invention provides a data receiving end device, including a receiving portion, a second timer control portion, and a second determining portion, where the receiving portion is configured to receive data;
the second timer control part is configured to start a second timer after the receiving part receives the data;
the second determination section configured to determine a first reception state of the data;
and determining whether to attempt to send first feedback information within the timing time of the second timer according to the first receiving state.
In a fifth aspect, an embodiment of the present invention provides a data sending end device, including: a first network interface, a first memory and a first processor; wherein the content of the first and second substances,
the first network interface is used for receiving and sending signals in the process of receiving and sending information with other external network elements;
the first memory for storing a computer program operable on a first processor;
the first processor is configured to, when running the computer program, perform the steps of the method of the first aspect.
In a sixth aspect, an embodiment of the present invention provides a data receiving end device, including a second network interface, a second memory, and a second processor;
the second network interface is used for receiving and sending signals in the process of receiving and sending information with other external network elements;
the second memory for storing a computer program operable on a second processor;
the second processor is configured to, when running the computer program, perform the steps of the method of the second aspect.
In a seventh aspect, an embodiment of the present invention provides a computer storage medium, where a data transmission program is stored, and when executed by at least one processor, the data transmission program implements the steps of the method according to the first aspect or the second aspect.
The embodiment of the invention provides a data transmission method, data transmission equipment and a computer storage medium; in the technical scheme of the embodiment of the invention, a data receiving end is provided with a timer, and feedback information is determined according to the timing state of the timer and the receiving result of the data; the data sending end sets a timer and determines whether to carry out HARQ retransmission according to the timing state of the timer and the feedback information of the receiving end. Thus, for the V2X technology, data transmission based on the HARQ mechanism is realized.
Drawings
FIG. 1 is a schematic view of a scenario of mode 3 in a vehicle networking;
FIG. 2 is a schematic view of a scenario of mode 4 in the Internet of vehicles;
fig. 3 is a schematic flow chart of an information transmission method according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of another information transmission method according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating a composition of a data sending end device according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a specific hardware structure of a data sending end device according to an embodiment of the present invention;
fig. 7 is a schematic diagram illustrating a data receiving end device according to an embodiment of the present invention;
fig. 8 is a schematic diagram illustrating another data receiving device according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a specific hardware structure of a data receiving end device according to an embodiment of the present invention;
fig. 10 is a schematic diagram of a system for data transmission according to an embodiment of the present invention.
Detailed Description
So that the manner in which the features and aspects of the embodiments of the present invention can be understood in detail, a more particular description of the embodiments of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings.
In order to facilitate understanding of the technical solutions of the embodiments of the present invention, the following respectively explains the mode 3 and the mode 4 in the car networking.
Mode 3: as shown in fig. 1, transmission resources of the in-vehicle terminal are allocated by a base station, such as an evolved NodeB (eNB) in LTE or a 5G base station (gNB) in a New air interface (NR, New Radio), and specifically, the base station issues a control message for indicating Grant (Grant) resources to the in-vehicle terminal through a Downlink (DL); then, the in-vehicle terminal transmits data to the SL according to the resource allocated by the base station. In mode 3, the base station may allocate a resource for single transmission to the in-vehicle terminal, or may allocate a resource for semi-static transmission to the terminal.
Mode 4: as shown in fig. 2, the vehicle-mounted terminal adopts a transmission mode of listening + reservation. The vehicle-mounted terminal acquires an available transmission resource set in the resource pool in an intercepting mode, and randomly selects one resource from the transmission resource set to transmit data. Because the service in the car networking system has a periodic characteristic, the vehicle-mounted terminal usually adopts a semi-static transmission mode, that is, after the vehicle-mounted terminal selects one transmission resource, the resource can be continuously used in a plurality of transmission cycles, so that the probability of resource reselection and resource conflict is reduced. The vehicle-mounted terminal can carry the information of the reserved secondary transmission resource in the control information transmitted at this time, so that other terminals can judge whether the resource is reserved and used by the vehicle-mounted terminal by detecting the control information of the vehicle-mounted terminal, and the aim of reducing resource conflict is fulfilled.
For the above two modes of exemplary illustration, in the V2X technology, after a sending end performs data transmission, the number of receiving ends receiving the sent data may be more than one, that is, a data transmission scenario may be a scenario of performing multicast on the sent data, in this scenario, if data transmission based on the HARQ mechanism needs to be implemented, as long as one receiving end does not receive correct sent data, the sending end needs to perform retransmission. This is a significant consumption of channel resources.
Therefore, how to balance the channel resource utilization rate and the correct receiving rate of the transmitted data is an important issue for realizing the data transmission based on the HARQ mechanism in the V2X technology. In response to this problem, embodiments of the present invention are illustrated and described by the following examples.
It can be understood that all technical solutions of the embodiments of the present invention are not only applicable to the car networking system, but also applicable to other end-to-end communication systems, the terminal in the embodiments of the present invention may be a vehicle-mounted terminal, a handheld terminal, a Personal Digital Assistant (PDA), a wearable terminal, and the like, and the network in the embodiments of the present invention may be an NR network, an LTE network, and the like.
Example one
Referring to fig. 3, which illustrates a method for data transmission provided in an embodiment of the present invention, where the method may be applied to a data sending end, and the method may include:
s301: when data is sent, a first timer is started;
s302: and determining whether to perform HARQ retransmission to the data receiving end according to the feedback information sent by the data receiving end and the state of the first timer.
In the technical scheme shown in fig. 3, the data sending end determines whether to perform HARQ retransmission according to the timing state of the first timer and the feedback information sent by the data receiving end, and in a multicast scenario, even if a time-frequency resource of the feedback information conflicts, the HARQ retransmission can be determined according to the receiving condition of the feedback information in the timing state of the first timer. Therefore, for the V2X technology, the data transmission based on the HARQ mechanism is realized, and the problem that HARQ retransmission cannot be smoothly realized due to time-frequency resource conflict is avoided.
In the technical solution shown in fig. 3, the first timer may be a preset first time period for timing, and when data is transmitted, the first timer is started to time according to the first time period. For the first timer, the state may include: the timer times out and the timer does not time out.
In specific implementation, the first time period for the first timer to time may be preset according to actual conditions. When the timing of the first timer reaches a set value, determining that the first timer is overtime; otherwise, the first timer is determined not to be overtime. Such as: setting the first time period to be 4ms, starting countdown from 4ms after the first timer is started, and when the first timer times out to be 0, considering that the first timer is overtime; when the first timer counts more than 0, the timer is not considered to be overtime.
For the technical solution shown in fig. 3, after the data sending end starts the first timer, the data sending end waits for the feedback information of the receiving end in the timing process of the first timer. For the feedback information, the indication information used for indicating whether the data reception is correct or not is fed back by the data receiving end, and therefore, in the embodiment of the present invention, the feedback information sent by the data receiving end may be specifically used for indicating the indication information of the data reception error, or the feedback information is used for indicating the indication information of the data reception correctness.
Based on the possible specific content of the feedback information, in a possible implementation manner, for step S302, the determining whether to perform HARQ retransmission to the data receiving end according to the feedback information sent by the data receiving end and the state of the first timer, where the indicating information used for indicating the data receiving error by the feedback information, may include: and if the feedback information is not received before the timing of the first timer is overtime, determining not to perform HARQ retransmission to the data receiving end. It can be understood that, if the feedback information is used to indicate that the data is received incorrectly, the data sending end may regard the data receiving end as correctly receiving the data if the feedback information is not received before the first timer times out, and therefore, HARQ retransmission for the sent data to the data receiving end is not required.
Correspondingly, in this implementation, the method may further include: and if the first timer receives the feedback information before the timing is overtime, determining to perform HARQ retransmission to the data receiving end. It can be understood that, when the data sending end receives the feedback information before the first timer times out, the data sending end can determine that HARQ retransmission for sending data to the data receiving end is required based on the content indicated by the feedback information.
Based on the possible specific content of the feedback information, in another possible implementation manner, for step S302, the determining whether to perform HARQ retransmission to the data receiving end according to the feedback information sent by the data receiving end and the state of the first timer, where the indicating information used for indicating that the data receiving end is correct corresponds to the feedback information, may include: and if the feedback information is not received before the timing of the first timer is overtime, determining to perform HARQ retransmission to the data receiving end. It can be understood that, if the feedback information is used to indicate that the data is received correctly, the data sending end may regard that the data receiving end has not received the data correctly before the first timer times out, and therefore, needs to perform HARQ retransmission for the sent data to the data receiving end.
Correspondingly, in this implementation, the method may further include: and if the first timer receives the feedback information before the timing is overtime, determining not to perform HARQ retransmission to the data receiving end. It can be understood that, when the data sending end receives the feedback information before the first timer times out, the data sending end can know that the data receiving end receives the data correctly based on the content indicated by the feedback information, and therefore, HARQ retransmission for the sent data to the data receiving end is not required.
For the above two implementation manners, if the data sending end performs HARQ retransmission to the data receiving end, the first timer may be restarted when the data sending end sends HARQ retransmission data, and whether to perform HARQ retransmission for the HARQ retransmission data is determined according to the timing state of the first timer and the feedback information for the HARQ retransmission data according to the above scheme.
If the data sending end does not perform HARQ retransmission to the data receiving end, new data can be sent to the data receiving end. The data sending end can restart the first timer and continue to determine whether to perform HARQ retransmission for new data according to the timing state of the first timer and the feedback information for the new data according to the above scheme.
For the technical solution shown in fig. 3, in a possible implementation manner, the method may further include:
and stopping timing after receiving the feedback information before the timing of the first timer is overtime.
It should be noted that, in this implementation manner, regardless of whether the feedback information is used to indicate indication information of a data reception error or indication information of a data reception correctness, after the data sending end receives the feedback information, the data sending end will determine whether to perform HARQ retransmission or send new data according to whether the data reception indicated by the feedback information is correct or not, and then the data sending end may stop timing by the first timer after receiving the feedback information.
For the technical solution shown in fig. 3, in a possible implementation manner, the method may further include:
and restarting the first timer after receiving the feedback information before the first timer times out.
It should be noted that, in this implementation manner, after receiving the feedback information, the data sending end may restart the first timer to perform re-timing on the receiving condition of the feedback information of the subsequent data sending.
For the technical scheme of this embodiment, in consideration of the collision situation of the time-frequency resource of the feedback information, the data sending end determines the receiving situation of the feedback information according to the timing state of the first timer, and determines whether to perform HARQ retransmission according to the receiving situation and the specific indication content of the feedback information, so as to implement data transmission based on the HARQ mechanism for the V2X technology, and avoid that the HARQ retransmission cannot be successfully implemented due to the time-frequency resource collision.
Example two
Based on the data transmission method of the sending end in the above embodiments, an embodiment of the present invention provides a data transmission method. Referring to fig. 4, the method may be applied to a data receiving end, and the method includes:
s401: after receiving the data, starting a second timer;
s402: determining a first reception state of the data;
s403: and determining whether to attempt to send first feedback information within the timing time of the second timer according to the first receiving state.
For the technical scheme shown in fig. 4, when the data receiving end sends the feedback information, for the situation of time-frequency resource collision which is relatively easy to occur in the V2X technology, the first feedback information for the data is sent by timing of the second timer, so that the HARQ retransmission cannot be successfully realized due to the time-frequency resource collision.
In the technical solution shown in fig. 4, the specific working mechanism of the second timer is the same as the working mechanism of the first timer described in the foregoing embodiment. Preferably, the second time period counted by the second timer may be set to be the same as the first time period counted by the first timer, and this embodiment will not be described in detail herein.
In the technical solution shown in fig. 4, the first receiving state corresponds to a receiving state of the received data in step S401, and may specifically include: a correct reception state and an incorrect reception state.
It should be noted that, after the data receiving end receives the data, the data receiving end may parse the received data, and determine the first receiving status of the data according to a parsing result. Specifically, when the data receiving end can correctly analyze the data, the first receiving state is a correct receiving state; when the data receiving end cannot analyze the data or cannot correctly analyze the data, the first receiving state is an error receiving state.
In the technical solution shown in fig. 4, the data receiving end may send the first receiving state carried in the feedback information to the data sending end, so that the data sending end determines whether to perform HARQ retransmission on the data according to the first receiving state indicated in the feedback information. For how to determine whether to perform HARQ retransmission, the specific data sending end refers to the description in the first embodiment, and details are not described herein.
Corresponding to the first receiving status being an erroneous receiving status, for the technical solution shown in fig. 4, in a possible implementation manner, determining whether to attempt to send the first feedback information within the timing time of the second timer according to the first receiving status includes:
and when the data is received correctly corresponding to the first receiving state indicated in the first feedback information being the wrong receiving state, determining not to attempt to send the first feedback information within the timing time of the second timer.
As can be understood, since the content fed back by the first feedback information is that the data is received incorrectly, if the data is received correctly, the data receiving end may not need to send the first feedback information to the data sending end; for this situation, corresponding to the data sending end, if the first feedback information is not received within a certain time, the data sending end may consider that the data receiving end correctly receives the data, and need not perform HARQ retransmission for the data.
Correspondingly, in this implementation, the method may further include: and if the data reception is wrong, determining to attempt to send the first feedback information within the timing time of the second timer.
It can be understood that, if the data receiving end receives the data error, the content and the situation indicated by the first feedback information are met, and at this time, the data receiving end may try to send the first feedback information within the timing time of the second timer in consideration of the conflict situation of the time-frequency resources used by the feedback information during transmission; in a specific implementation process, the data receiving end may indicate that the first receiving status is that the data is received in error through the NACK signal. After receiving the first feedback information, the data sending end can acquire the data receiving error, thereby determining to perform HARQ retransmission for the data.
Corresponding to the first receiving status being an erroneous receiving status, for the technical solution shown in fig. 4, in a possible implementation manner, determining whether to attempt to send the first feedback information within the timing time of the second timer according to the first receiving status includes:
receiving the data correctly corresponding to a first receiving status indicated in the first feedback information; and if the data is received correctly, determining to attempt to send the first feedback information within the timing time of the second timer.
It can be understood that, since the content fed back by the first feedback information is that the data is correctly received, if the data is correctly received, the content and the situation indicated by the first feedback information are met, at this time, the data receiving end may attempt to send the first feedback information within the timing time of the second timer, taking into account the collision situation of the time-frequency resources used by the feedback information during transmission; in a specific implementation process, the data receiving end may indicate that the first receiving status is to receive the data in error through the ACK signal. After receiving the first feedback information, the data sending end can know that the data is correctly received, so that HARQ retransmission for the data is not needed.
Correspondingly, in this implementation, the method may further include:
and if the data reception is wrong, determining not to attempt to send the first feedback information within the timing time of the second timer.
It can be understood that, since the content fed back by the first feedback information is that the data is correctly received, if the data is received incorrectly, the data receiving end does not need to send the first feedback information to the data sending end; for this situation, corresponding to the data sending end, if the first feedback information is not received within a certain time, the data sending end may consider that the data receiving end receives the data incorrectly, and therefore, HARQ retransmission needs to be performed on the data.
For the above technical solution in this embodiment, in consideration of time-frequency resource collision possibly occurring in the transmission process of the feedback information, in a possible implementation manner, the method further includes:
attempting to transmit first feedback information in response to determining that the second timer is timed out; and if the first feedback information is not successfully sent before the second timer is overtime, the first feedback information is cancelled.
It can be understood that, if the first feedback message is not successfully sent before the second timer expires, it may indicate that the time-frequency resource collision condition of the feedback message transmission is severe, and to avoid worsening the collision condition of the time-frequency resource, the sending of the first feedback message may be cancelled.
For the above technical solution in this embodiment, in a possible implementation manner, regardless of the content and situation indicated by the first feedback information, the data sending end is affected to determine whether to perform HARQ retransmission for the data, and if HARQ retransmission data of the data or new data is received, it indicates that the data sending end has completed HARQ retransmission of the data, so the data receiving end may also cancel sending the first feedback information. It can be understood that, in this implementation manner, if the first receiving state indicated by the first feedback information is that the data is received in error, the data receiving end receives HARQ retransmission data for the data without sending the first feedback information, and then the data receiving end may directly obtain the actual content of the data based on the data received in step S401 and the HARQ retransmission data of the data. If the first receiving state indicated by the first feedback information is that the data is correctly received, the data receiving end receives the HARQ retransmission data for the data when the first feedback information is not sent yet, and based on the correctness of the received data, the data receiving end can directly discard the HARQ retransmission data for the data.
For HARQ retransmission data in this implementation, the data receiving end may still determine whether to attempt to send feedback information for its receiving status, based on which the method further includes:
corresponding to the received HARQ retransmission data of the data, determining a second receiving state of the data according to the data and the HARQ retransmission data of the data, and determining whether to send second feedback information based on the second receiving state; wherein the second feedback information is used to characterize the second receiving status as the data being received incorrectly or correctly.
For the technical scheme of this embodiment, in consideration of the collision situation of the time-frequency resource of the feedback information, the data receiving end determines whether to send the first feedback information within the timing time of the second timer based on the receiving state of the received data to indicate the data sending end to determine whether to perform HARQ retransmission, so as to implement data transmission based on the HARQ mechanism and avoid that the HARQ retransmission cannot be successfully implemented due to the time-frequency resource collision for the V2X technology.
EXAMPLE III
Based on the same inventive concept of the foregoing embodiment, referring to fig. 5, it shows a data transmitting end device 50 provided by the embodiment of the present invention, which includes a transmitting part 501, a first timer control part 502 and a first determining part 503; wherein the transmitting section 501 is configured to transmit data;
the first timer control section 502 configured to start a first timer when the transmitting section 501 transmits data;
the first determining part 503 is configured to determine whether to perform HARQ retransmission to the data receiving end according to the feedback information sent by the data receiving end and the state of the first timer.
In the above scheme, the first determining part 503 is configured to determine not to perform HARQ retransmission to the data receiving end if the feedback information is not received before the first timer times out.
In the above scheme, the first determining part 503 is further configured to determine to perform HARQ retransmission to the data receiving end if the feedback information is received before the first timer times out.
In the above scheme, the first determining part 503 is configured to determine to perform HARQ retransmission to the data receiving end if the feedback information is not received before the first timer times out.
In the above scheme, the first determining part 503 is further configured to determine not to perform HARQ retransmission to the data receiving end if the feedback information is received before the first timer times out.
In the above solution, the first timer control section 502 is further configured to receive the feedback information before the first timer times out, and stop timing.
In the above solution, the first timer control section 502 is further configured to receive the feedback information before the first timer times out, and restart the first timer.
In the above scheme, the first timer control part 502 is further configured to restart the first timer when performing HARQ retransmission to the data receiving end.
It is understood that in this embodiment, "part" may be part of a circuit, part of a processor, part of a program or software, etc., and may also be a unit, and may also be a module or a non-modular.
In addition, each component in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit. The integrated unit can be realized in a form of hardware or a form of a software functional module.
Based on the understanding that the technical solution of the present embodiment essentially or a part contributing to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, and include several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method of the present embodiment. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Accordingly, the present embodiment provides a computer storage medium storing a program for data transmission, which when executed by at least one processor implements the steps of the method of the first embodiment.
Based on the data sending end device 50 and the computer storage medium, referring to fig. 6, a specific hardware structure of a network side device 50 according to an embodiment of the present invention is shown, and the specific hardware structure may include: a first network interface 601, a first memory 602, and a first processor 603; the various components are coupled together by a bus system 604. It is understood that the bus system 604 is used to enable communications among the components. The bus system 604 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 604 in fig. 6. The first network interface 601 is configured to receive and transmit signals in a process of receiving and transmitting information with other external network elements;
a first memory 602 for storing a computer program operable on the first processor 603;
a first processor 603 configured to, when running the computer program, perform:
when data is sent, a first timer is started;
and determining whether to perform HARQ retransmission to the data receiving end according to the feedback information sent by the data receiving end and the state of the first timer.
It will be appreciated that the first memory 602 in embodiments of the invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (ddr Data Rate SDRAM, ddr SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The first memory 602 of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
The first processor 603 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the first processor 603. The first Processor 603 may be a general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the first memory 602, and the first processor 603 reads the information in the first memory 602, and completes the steps of the method in combination with the hardware thereof.
It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the Processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.
For a software implementation, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.
Specifically, when the first processor 603 in the data sender device 50 is further configured to run a computer program, the method steps described in the first embodiment are executed, and are not described herein again.
Example four
Based on the same inventive concept of the foregoing embodiments, referring to fig. 7, it shows a composition of a data receiving end device 70 provided by the embodiments of the present invention, which includes a receiving portion 701, a second timer control portion 702, and a second determining portion 703, where the receiving portion 701 is configured to receive data;
the second timer control section 702 is configured to start a second timer after the receiving section 701 receives data;
the second determining portion 703 configured to determine a first receiving state of the data;
and determining whether to attempt to send first feedback information within the timing time of the second timer according to the first receiving state.
In the above scheme, the second determining section 703 is configured to receive the data in error corresponding to the first reception state indicated in the first feedback information; and if the data is received correctly, determining not to attempt to send the first feedback information within the timing time of the second timer.
In the above solution, the second determining part 703 is further configured to determine to attempt to send the first feedback information within the timing time of the second timer if the data reception is incorrect.
In the above scheme, the second determining part 703 is configured to correctly receive the data corresponding to the first receiving status indicated in the first feedback information; and if the data is received correctly, determining to attempt to send the first feedback information within the timing time of the second timer.
In the above solution, the second determining part 703 is further configured to determine not to attempt to send the first feedback information within the timing time of the second timer if the data reception is incorrect.
In the above-described aspect, referring to fig. 8, the data receiving-end device 70 further includes a transmission control section 704 configured to attempt to transmit the first feedback information in response to determining that the timing of the second timer is within the timing time; and if the first feedback information is not successfully sent before the second timer is overtime, the first feedback information is cancelled.
In the above scheme, as shown in fig. 8, the transmission control part 704 is configured to cancel transmission of the first feedback information if HARQ retransmission data of the data or new data is received.
In the above solution, the second determining part 703 is further configured to determine, in response to receiving HARQ retransmission data of the data, a second receiving state of the data according to the data and the HARQ retransmission data of the data, and determine whether to send second feedback information based on the second receiving state; wherein the second feedback information is used to characterize the second receiving status as the data being received incorrectly or correctly.
In addition, the present embodiment provides a computer storage medium storing a program for data transmission, which when executed by at least one processor implements the steps of the method of the second embodiment. For specific description of the computer-readable medium, refer to the description in embodiment three, and are not repeated here.
Based on the data receiving end device 70 and the computer storage medium, referring to fig. 9, a specific hardware structure of the data receiving end device 70 according to an embodiment of the present invention is shown, which includes: a second network interface 901, a second memory 902, and a second processor 903; the various components are coupled together by a bus system 904. It is understood that the bus system 904 is used to enable communications among the components. The bus system 904 includes a power bus, a control bus, and a status signal bus in addition to a data bus. But for clarity of illustration the various buses are labeled as bus system 904 in figure 9. Wherein the content of the first and second substances,
the second network interface 901 is configured to receive and send signals in a process of receiving and sending information with other external network elements;
a second memory 902 for storing a computer program capable of running on the second processor 903;
a second processor 903, configured to execute, when running the computer program: after receiving the data, starting a second timer; determining a first reception state of the data; and determining whether to attempt to send first feedback information within the timing time of the second timer according to the first receiving state.
It can be understood that, in this embodiment, components in the specific hardware structure of the data receiving end 70 are similar to corresponding components in the third embodiment, and are not described herein again.
Specifically, the second processor 903 in the data receiving end 70 is further configured to execute the method steps described in the second embodiment when running the computer program, which is not described herein again.
Based on the above embodiments, referring to fig. 10, it shows a system 10 for data transmission provided by the embodiment of the present invention, which is applied to a terminal in a device-to-device D2D, and may even be applied to a terminal in a V2X technology; including a first terminal 1001 and a second terminal 1002; the first terminal 1001 is the data transmitting end 50 in any of the foregoing embodiments; the second terminal 1002 is the data receiving terminal 70 in any of the foregoing embodiments.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Industrial applicability
In the embodiment of the invention, in consideration of the conflict situation of the time-frequency resource of the feedback information, the data sending end determines the receiving situation of the feedback information according to the timing state of the first timer and determines whether to perform HARQ retransmission according to the receiving situation and the specific indication content of the feedback information, so that the data transmission based on the HARQ mechanism is realized for the V2X technology, and the problem that the HARQ retransmission cannot be smoothly realized due to the time-frequency resource conflict is avoided.
Claims (32)
1. A method for data transmission is applied to a data sending end, and comprises the following steps:
starting a first timer when data is sent in a scene of multicasting the sent data;
determining whether to perform HARQ retransmission to a data receiving end according to feedback information sent by the data receiving end and the state of the first timer;
and restarting the first timer when the data sending end carries out HARQ retransmission to the data receiving end.
2. The method of claim 1, wherein the determining whether to perform HARQ retransmission to the data receiving end according to the feedback information sent by the data receiving end and the state of the first timer comprises:
and if the feedback information is not received before the timing of the first timer is overtime, determining not to perform HARQ retransmission to the data receiving end.
3. The method of claim 2, wherein the method further comprises:
and if the first timer receives the feedback information before the timing is overtime, determining to perform HARQ retransmission to the data receiving end.
4. The method of claim 1, wherein the determining whether to perform HARQ retransmission to the data receiving end according to the feedback information sent by the data receiving end and the state of the first timer comprises:
and if the first timer does not receive the feedback information before the timing is overtime, determining to perform HARQ retransmission to the data receiving end.
5. The method of claim 4, wherein the method further comprises:
and if the first timer receives the feedback information before the timing is overtime, determining not to perform HARQ retransmission to the data receiving end.
6. The method of claim 1, wherein the method further comprises:
and stopping timing after receiving the feedback information before the timing of the first timer is overtime.
7. The method of claim 1, wherein the method further comprises:
and restarting the first timer after receiving the feedback information before the first timer times out.
8. A method for data transmission, the method is applied to a data receiving end, and the method comprises the following steps:
starting a second timer after receiving the data in a scene of multicasting the transmitted data;
determining a first reception state of the data;
determining whether to attempt to send first feedback information within the timing time of the second timer according to the first receiving state;
and if receiving HARQ retransmission data or new data of the data, canceling to send the first feedback information.
9. The method of claim 8, wherein determining whether to attempt to transmit first feedback information within a timing time of the second timer according to the first reception state comprises:
receiving the data in error corresponding to a first reception status indicated in the first feedback information; and if the data is received correctly, determining not to attempt to send the first feedback information within the timing time of the second timer.
10. The method of claim 9, wherein the method further comprises:
and if the data reception is wrong, determining to attempt to send the first feedback information within the timing time of the second timer.
11. The method of claim 8, wherein determining whether to attempt to transmit first feedback information within a timing time of the second timer according to the first reception state comprises:
receiving the data correctly corresponding to a first receiving status indicated in the first feedback information; and if the data is received correctly, determining to attempt to send the first feedback information within the timing time of the second timer.
12. The method of claim 11, wherein the method further comprises:
and if the data reception is wrong, determining not to attempt to send the first feedback information within the timing time of the second timer.
13. The method of any of claims 8 to 12, wherein the method further comprises:
attempting to transmit first feedback information in response to determining that the second timer is timed out; and if the first feedback information is not successfully sent before the second timer is overtime, the first feedback information is cancelled.
14. The method of claim 8, wherein the method further comprises:
corresponding to the received HARQ retransmission data of the data, determining a second receiving state of the data according to the data and the HARQ retransmission data of the data, and determining whether to send second feedback information based on the second receiving state; wherein the second feedback information is used to characterize the second receiving status as the data being received incorrectly or correctly.
15. A data transmitting terminal device includes a transmitting section, a first timer control section, and a first determining section; the sending part is configured to send data under the scene of multicasting the sent data;
the first timer control part is configured to start a first timer when the transmitting part transmits data;
the first determining part is configured to determine whether to perform HARQ retransmission to a data receiving end according to feedback information sent by the data receiving end and the state of the first timer;
the first timer control part is further configured to restart the first timer when performing HARQ retransmission to the data receiving end.
16. The data transmitting end device according to claim 15, wherein the first determining part is configured to determine not to perform HARQ retransmission to the data receiving end if the feedback information is not received before the first timer expires.
17. The data sending end device according to claim 16, wherein the first determining part is further configured to determine to perform HARQ retransmission to the data receiving end if the feedback information is received before the first timer expires.
18. The data sending end device according to claim 15, wherein the first determining part is configured to determine to perform HARQ retransmission to the data receiving end if the feedback information is not received before the first timer times out.
19. The data sending end device according to claim 18, wherein the first determining part is further configured to determine not to perform HARQ retransmission to the data receiving end if the feedback information is received before the first timer expires.
20. The data transmitting end device according to claim 15, wherein the first timer control section is further configured to receive the feedback information before the first timer times out, and stop timing.
21. The data sending end device according to claim 15, wherein the first timer control section is further configured to restart the first timer upon receiving the feedback information before the first timer times out.
22. A data receiving end device comprises a receiving part, a second timer control part and a second determination part, wherein the receiving part is configured to receive data in a scene of multicasting the transmitted data;
the second timer control part is configured to start a second timer after the receiving part receives the data;
the second determination section configured to determine a first reception state of the data;
determining whether to attempt to send first feedback information within the timing time of the second timer according to the first receiving state;
the data receiving end equipment further comprises a sending control part configured to cancel sending the first feedback information if HARQ retransmission data or new data of the data is received.
23. The data receiving terminal apparatus according to claim 22, wherein the second determining section is configured to receive the data in error corresponding to a first reception status indicated in the first feedback information; and if the data is received correctly, determining not to attempt to send the first feedback information within the timing time of the second timer.
24. The data receiving terminal apparatus according to claim 23, wherein the second determining section is further configured to determine to attempt to transmit the first feedback information within a timing time of the second timer if the data reception is erroneous.
25. The data receiving terminal apparatus according to claim 22, wherein the second determining section is configured to determine that the data is correctly received in response to the first reception state indicated in the first feedback information; and if the data is received correctly, determining to attempt to send the first feedback information within the timing time of the second timer.
26. The data receiving terminal apparatus according to claim 25, wherein the second determining section is further configured to determine not to attempt to transmit the first feedback information within a time counted by the second timer if the data reception is erroneous.
27. The data receiving-end device according to any one of claims 22 to 26, wherein the data receiving-end device further includes a transmission control section configured to attempt to transmit the first feedback information in response to determining that the timing of the second timer is within the timing time; and if the first feedback information is not successfully sent before the second timer is overtime, the first feedback information is cancelled.
28. The data receiving end device according to any one of claims 22 to 26, wherein the second determining part is further configured to determine, in response to receiving HARQ retransmission data of the data, a second receiving state of the data according to the data and the HARQ retransmission data of the data, and determine whether to transmit second feedback information based on the second receiving state; wherein the second feedback information is used to characterize the second receiving status as the data being received incorrectly or correctly.
29. A data transmitting-end device, comprising: a first network interface, a first memory and a first processor; wherein the content of the first and second substances,
the first network interface is used for receiving and sending signals in the process of receiving and sending information with other external network elements;
the first memory for storing a computer program operable on the first processor;
the first processor, when executing the computer program, is configured to perform the steps of the method of any of claims 1 to 7.
30. A data receiving end device comprises a second network interface, a second memory and a second processor;
the second network interface is used for receiving and sending signals in the process of receiving and sending information with other external network elements;
the second memory for storing a computer program operable on a second processor;
the second processor, when executing the computer program, is configured to perform the steps of the method of any of claims 8 to 14.
31. A system for data transmission, applied to a terminal in a device-to-device D2D; the system comprises a first terminal and a second terminal; wherein the first terminal is the data transmitting end of any one of claims 15 to 21 and claim 29; the second terminal is the data receiving end of any one of claims 22 to 28 and claim 30.
32. A computer storage medium storing a program for data transmission, which when executed by at least one processor implements the steps of the method of any one of claims 1 to 7 or any one of claims 8 to 14.
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| PCT/CN2018/075321 WO2019148504A1 (en) | 2018-02-05 | 2018-02-05 | Data transmission method and device, and computer storage medium |
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| CN112822645B (en) * | 2019-11-18 | 2022-05-24 | 上海朗帛通信技术有限公司 | Method and apparatus in a node used for wireless communication |
| CN110913431A (en) * | 2019-11-27 | 2020-03-24 | 深圳云博智联科技有限公司 | Data wireless transmission method and device, computer equipment and storage medium |
| CN115065442B (en) * | 2022-08-16 | 2022-11-18 | 深圳星云智联科技有限公司 | Data transmission method and related device |
| CN115604759A (en) * | 2022-12-13 | 2023-01-13 | 杭州优智联科技有限公司（Cn） | Scheduling method, device, system and medium based on UWB data transmission |
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