WO2018130146A1 - Data transmission method and data transmission device - Google Patents

Abstract

The present invention provides a data transmission method and a data transmission device. The data transmission method comprises: receiving first data, and recording a first transmission time of the first data; determining a first transmission window of second data according to the first transmission time, a preset length of a transmission window, and a maximum time delay between second data and the first data; and sending the second data within the first transmission window, wherein in the case that the first data is first service data, the second data is feedback information of the first service data, and if the first data is first uplink authorization information, the second data is first uplink data corresponding to the first uplink authorization information.

Description

Data transmission method and data transmission device

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. 201710025528.8, filed Jan.

Technical field

The present disclosure relates to the field of mobile communications technologies, and in particular, to a data transmission method and a data transmission device.

Background technique

In the next generation communication system (5G), a low latency and high reliability service scenario is introduced. Such business scenarios, such as car networking, require strict data transmission delays and reliability. In the current Long Term Evolution (LTE) system, the data transmission delay mainly includes the protocol stack processing delay and the air interface delay. For downlink data, the air interface delay is mainly the delay caused by the possible air interface hybrid automatic repeat request (HARQ) retransmission. For uplink data, the air interface delay consists of three parts:

1. Transmitting a scheduling request or a buffer status report (BSR) to a base station to allocate resources to a terminal (UE);

2. The delay between the result of resource allocation and the transmission of uplink data;

3. Delay of uplink data retransmission.

Regardless of the situation, the delay caused by HARQ and the delay between uplink resource allocation and uplink data transmission are fixed, and occupy a certain proportion in the overall transmission delay. In the LTE system of the related art, regardless of the uplink and downlink configuration, the HARQ feedback corresponding to the downlink data and the time interval between the uplink data and the corresponding HARQ feedback are usually fixed.

Table 1 below shows the feedback timing relationship of the time division duplex (TDD) downlink HARQ. The HARQ feedback corresponding to the downlink data on the subframe n-k in Table 1 is transmitted on the uplink subframe n. For all subframe configurations, the interval between the downlink data and the corresponding HARQ feedback is fixed. For example, in the case of the TDD subframe configuration 2, the HARQ feedback corresponding to the downlink data of the air interface subframe 4 is transmitted on the subframe 12 (time interval k=8), and the HARQ feedback corresponding to the downlink data of the air interface subframe 5 is in the subframe 12 Up (time interval k=7), the HARQ feedback corresponding to the downlink data of the air interface subframe 6 is on the subframe 12 (time interval k=6), and the HARQ feedback corresponding to the downlink data transmitted by the air interface subframe 8 is also in the subframe 12 Up (time interval k=4).

Table 1: Downstream HARQ-related K values in TDD

Table 2 below gives an example of the timing relationship of TDD uplink data and corresponding HARQ feedback in an LTE system. It can be seen that the time interval of uplink data and HARQ feedback is fixed regardless of the frame structure configuration.

Table 2: Interval k of HARQ feedback and PUSCH data in TDD

In the LTE system of the related art, whether the uplink or the downlink is usually a fixed HARQ feedback time, there is also a fixed time interval between the uplink grant and the uplink data transmission, which may cause a delay of the air interface transmission. In the solution of the related art, all terminals need to be processed according to the timing relationship.

Summary of the invention

The technical problem to be solved by the embodiments of the present disclosure is to provide a data transmission method and a data transmission apparatus for changing a fixed timing relationship of data transmission, and providing technical support for reducing data delay.

To solve the above technical problem, the data transmission method provided by the embodiment of the present disclosure includes:

Receiving the first data, and recording the first sending time of the first data;

Determining, according to the first sending time, a length of a preset sending window, and a maximum delay between the second data and the first data, a first sending window of the second data;

Transmitting the second data in the first sending window;

The second data is feedback information of the first service data when the first data is the first service data, and the second data is the first data when the first data is the first uplink authorization information. The first uplink data corresponding to the uplink grant information.

Another data transmission method provided by an embodiment of the present disclosure includes:

Sending the first data, recording the first sending time of the first data;

Determining, according to the first sending time, a length of a preset sending window, and a maximum delay between the second data and the first data, a first sending window of the second data;

Receiving the second data in the first sending window;

The second data is feedback information of the first service data when the first data is the first service data, and the second data is the first data when the first data is the first uplink authorization information. The first uplink data corresponding to the uplink grant information.

A data transmission apparatus provided by an embodiment of the present disclosure includes:

a first receiving unit, configured to receive first data, and record a first sending time of the first data;

a first determining unit, configured to determine, according to the first sending time, a length of a preset sending window, and a maximum delay between the second data and the first data, a first sending window of the second data;

a first sending unit, configured to send the second data in the first sending window;

The second data is feedback information of the first service data when the first data is the first service data, and the second data is the first data when the first data is the first uplink authorization information. The first uplink data corresponding to the uplink grant information.

Another data transmission apparatus provided by an embodiment of the present disclosure includes:

a sending unit, configured to send the first data, and record a first sending time of the first data;

a first determining unit, configured to determine, according to the first sending time, a length of a preset sending window, and a maximum delay between the second data and the first data, a first sending window of the second data;

a first receiving unit, configured to receive the second data in the first sending window;

The second data is feedback information of the first service data when the first data is the first service data, and the second data is the first data when the first data is the first uplink authorization information. The first uplink data corresponding to the uplink grant information.

A data transmission apparatus provided by an embodiment of the present disclosure includes a processor, a transceiver, and a memory;

The processor is configured to read a program in the memory and perform the following process:

Receiving the first data, and recording the first sending time of the first data;

Determining, according to the first sending time, a length of a preset sending window, and a maximum delay between the second data and the first data, a first sending window of the second data;

Transmitting the second data in the first sending window;

The second data is feedback information of the first service data when the first data is the first service data, and the second data is the first data when the first data is the first uplink authorization information. First uplink data corresponding to an uplink grant information;

The transceiver is configured to receive and transmit data;

The memory is used to store data used by the processor to perform operations.

A data transmission apparatus provided by an embodiment of the present disclosure includes a processor, a transceiver, and a memory;

The processor is configured to read a program in the memory and perform the following process:

Sending the first data, recording the first sending time of the first data;

Determining, according to the first sending time, a length of a preset sending window, and a maximum delay between the second data and the first data, a first sending window of the second data;

Receiving the second data in the first sending window;

The second data is feedback information of the first service data when the first data is the first service data, and the second data is the first data when the first data is the first uplink authorization information. First uplink data corresponding to an uplink grant information;

The transceiver is configured to receive and transmit data;

The memory is used to store data used by the processor to perform operations.

A non-transitory computer readable storage medium provided by the embodiment of the present disclosure stores computer readable instructions executable by a processor, when the computer readable instructions are executed by a processor, the processor performs the following operating:

Receiving the first data, and recording the first sending time of the first data;

Determining, according to the first sending time, a length of a preset sending window, and a maximum delay between the second data and the first data, a first sending window of the second data;

Transmitting the second data in the first sending window;

The second data is feedback information of the first service data when the first data is the first service data, and the second data is the first data when the first data is the first uplink authorization information. The first uplink data corresponding to the uplink grant information.

A non-transitory computer readable storage medium provided by the embodiment of the present disclosure stores computer readable instructions executable by a processor, when the computer readable instructions are executed by a processor, the processor performs the following operating:

Sending the first data, recording the first sending time of the first data;

Determining, according to the first sending time, a length of a preset sending window, and a maximum delay between the second data and the first data, a first sending window of the second data;

Receiving the second data in the first sending window;

The second data is feedback information of the first service data when the first data is the first service data, and the second data is the first data when the first data is the first uplink authorization information. The first uplink data corresponding to the uplink grant information.

The data transmission method and the data transmission apparatus provided by the embodiments of the present disclosure reduce the air interface delay from shortening the HARQ feedback time and reducing the uplink grant to the uplink data transmission interval. Compared with the fixed feedback time and the fixed uplink transmission interval of the related art, the embodiment of the present disclosure can flexibly select the feedback time of the HARQ and the transmission time of the uplink MAC PDU according to the processing capability of the terminal and the base station, so as to reduce the low latency and high reliability. Technical support for data latency of the business. In addition, the embodiments of the present disclosure may also perform fast scheduling or fast feedback for low-latency and high-reliability services according to requirements, and may not open fast scheduling or fast feedback functions for common services, so as to achieve backward compatibility with common services.

DRAWINGS

FIG. 1 is a schematic flowchart diagram of a data transmission method according to some embodiments of the present disclosure;

FIG. 2 is a schematic flowchart diagram of another data transmission method according to some embodiments of the present disclosure;

3 is a schematic diagram of a transmission window of downlink HARQ feedback in some embodiments of the present disclosure;

4 is a schematic diagram of a transmission window of uplink HARQ feedback in some embodiments of the present disclosure;

5 is a schematic diagram of a transmission window of uplink data in some embodiments of the present disclosure;

FIG. 6 is a schematic structural diagram of a data transmission apparatus according to some embodiments of the present disclosure;

FIG. 7 is a schematic structural diagram of another data transmission apparatus according to some embodiments of the present disclosure.

detailed description

The technical problems, the technical solutions, and the advantages of the present invention will be more clearly described in conjunction with the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to assist in a comprehensive understanding of the embodiments of the present disclosure. It will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the disclosure. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

It is to be understood that the phrase "one embodiment" or "an embodiment" or "an" or "an" Thus, "in one embodiment" or "in an embodiment" or "an" In addition, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the various embodiments of the present disclosure, it should be understood that the size of the serial numbers of the following processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be implemented by the present disclosure. The implementation of the examples constitutes any limitation.

Additionally, the terms "system" and "network" are used interchangeably herein. It should be understood that the term "and/or" herein is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B exist simultaneously. There are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship. In the embodiments provided herein, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined from A. However, it should also be understood that determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.

In the embodiment of the present disclosure, the form of the base station is not limited, and may be a Macro Base Station, a Pico Base Station, a Node B (a name of a 3G mobile base station), an enhanced base station (eNB), and a home. Enhanced base station (Femto eNB or Home eNode B or Home eNB or HeNB), relay station, access point, RRU (Remote Radio Unit), RRH (Remote Radio Head), 5G mobile communication Network side nodes in the system, such as a central unit (CU, Central Unit) and a distributed unit (DU, distributed unit). The terminal may be a mobile phone (or mobile phone), or other device capable of transmitting or receiving wireless signals, including user equipment (UE), personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop Computers, cordless phones, wireless local loop (WLL) stations, CPE (Customer Premise Equipment) capable of converting mobile signals into WiFi signals, mobile smart hotspots, smart home appliances, or other non-human operations can spontaneously Equipment for communication in a mobile communication network, etc.

The mobile communication system in the related art is usually a fixed HARQ feedback time whether it is uplink or downlink, and there is also a fixed time interval between the uplink grant and the uplink data transmission. As the processing power of the terminal and the base station increases, the processing time required is gradually shortened. The timing relationship of the related art limits the delay of the air interface. For example, the HARQ feedback needs to wait for the same time regardless of the service. The embodiments of the present disclosure propose a new data transmission method for low-latency and high-reliability services from the aspects of shortening the HARQ feedback delay and reducing the time interval between the uplink grant and the uplink scheduling, and reducing the data delay.

Referring to FIG. 1 , a data transmission method provided by some embodiments of the present disclosure may be applied to a base station side or a terminal side, including:

Step 11: Receive first data, and record a first sending time of the first data.

Here, the first data may be service data, and may also be uplink authorization information. In some embodiments of the present disclosure, time may be represented by the location of the time domain transmission resource that transmitted the data. For example, the first transmission time of the first data may be represented by the location of the time domain transmission resource (such as the subframe of the LTE system, the OFDM symbol) where the first data is located. Of course, different communication systems may adopt different time domains of different specifications. Transfer resources. In addition, time can also be expressed in other ways, such as system time.

Step 12: Determine a first sending window of the second data according to the first sending time, the length of the preset sending window, and the maximum delay between the second data and the first data.

Here, when the first data is the first service data, the second data is feedback information of the first service data, that is, HARQ feedback information, such as ACK/NACK information indicating success or failure of data reception. When the first data is the first uplink authorization information, the second data is the first uplink data corresponding to the first uplink authorization information.

In some embodiments of the present disclosure, the base station side and the terminal side preset a maximum delay between the first data and the second data, and preset a length of the transmission window, thereby determining a specific transmission window. position. Specifically, the lower boundary of the first sending window of the second data may be determined according to the formula K+NL, and the upper boundary of the first sending window of the second data is determined according to the formula K+N, where K represents the first The transmission time, N represents the maximum delay between the second data and the first data, and L represents the length of the transmission window.

Of course, in addition to the pre-agreed, the base station may dynamically configure the maximum delay between the first data and the second data by means of signaling messages, such as sending MAC layer signaling or RRC signaling, and pre-setting The length of the send window. In addition, when the first data is the first uplink grant information, the base station may carry, in the first uplink grant information, parameters such as a length of the sending window and a maximum delay between the second data and the first data.

Step 13. Send the second data in the first sending window.

Through the above steps, some embodiments of the present disclosure change the fixed timing relationship of the HARQ feedback in the communication system of the related art, or change the fixed timing relationship between the uplink grant and the uplink transmission, whereby the base station device or the terminal device can according to itself Processing capability, sending second data at the appropriate time in the transmission window, providing technical support for reducing data latency.

For example, for delay sensitive services, if the transmission preparation is completed when the lower boundary of the transmission window arrives, the second data may be immediately transmitted or transmitted in the first half of the transmission window. For delay-insensitive services, you can send them anywhere in the send window, for example, in the second half of the send window.

In order to consider compatibility with related art systems, some embodiments of the present disclosure may decide whether to perform the transmission scheme shown in FIG. 1 by the form of a function switch. For example, after the foregoing step 11, some embodiments of the present disclosure may further determine whether the first service corresponding to the first data is configured with a low delay transmission function: if yes, enter the steps 12-13 to pass the first The sending window sends the second data; otherwise, the first sending time corresponding to the first sending time is determined according to the preset fixed feedback timing relationship, and the second data is sent when the first sending time arrives. Here, the first sending time and the sending of the second data may be determined according to a similar implementation manner of the related art, and details are not described herein again.

When the first data is the first service data, the second data is the feedback information of the first service data. In order to improve the transmission reliability of the HARQ feedback information, in the above step 13, the feedback information of the first data may be sent multiple times in the first transmission window. In addition, when the feedback information of the first data is sent, the feedback information of the first data may be carried on a pre-configured transmission resource in the first transmission window. The transmission resource here may be a time-frequency domain resource configured by the base station through the signaling message. Furthermore, for the flexible dynamic HARQ feedback mechanism of some embodiments of the present disclosure, the feedback information of the first data may include ACK/NACK information indicating success or failure of reception of currently fed back data, and also includes The indication information of the currently fed back data, for example, the ACK/NACK information indicating the current data is the first data. The foregoing indication information may be the HARQ process ID corresponding to the currently fed back data, and may also be identified by the sending sequence corresponding to the currently fed back data. The above two marking manners are merely illustrative, and any manner of marking that can be used to indicate the first data can be applied to some embodiments of the present disclosure.

When the first data is the first uplink authorization information, the second data is the first uplink data corresponding to the first uplink authorization information. In this case, the first uplink grant information may include the uplink grant resource, the modulation and coding policy (MCS) number, the transmit power control (TPC) parameter, and the like, and may include the uplink HARQ process ID and the redundancy. Version (RV) information. In addition, the base station may further carry, in the first uplink authorization information, parameters such as a length of the sending window and a maximum delay between the second data and the first data, for determining the sending window in step 12.

When the first uplink data is sent in the foregoing step 13, the first uplink data may be sent in the first sending window, and the uplink HARQ process ID may be sent explicitly or implicitly. The explicit transmission means that the uplink HARQ process number is directly carried in the packet of the first uplink data that is sent in the first transmission window. The implicit transmission means that the uplink HARQ process number is not directly carried in the first uplink data packet, but the uplink HARQ process ID is indicated by other means. For example, different demodulation reference signals may be preset. The number of occupied symbols (NDMRS) corresponds to different HARQ processes, and when the first uplink data is sent, the NDMRS corresponding to the uplink HARQ process ID is sent, so that when receiving, the base station can demodulate the MAC PDU according to the physical layer. Determine the corresponding HARQ process ID.

Corresponding to the above method, some embodiments of the present disclosure further provide a data transmission method for receiving the second data sent in the foregoing step 13. The flow of the method is as shown in FIG. 2 . For example, when the method shown in FIG. 1 is applied to the base station side, the flow shown in FIG. 2 is applied to the terminal side; otherwise, when the method shown in FIG. 1 is applied to the terminal side, the flow shown in FIG. 2 is applied to the base station. side. As shown in FIG. 2, the data transmission method includes:

Step 21: Send the first data, and record the first sending time of the first data.

Step 22: Determine a first sending window of the second data according to the first sending time, the length of the preset sending window, and the maximum delay between the second data and the first data.

Here, when the first data is the first service data, the second data is feedback information of the first service data; when the first data is the first uplink authorization information, the second data is The first uplink data corresponding to the uplink grant information. Determining the first transmission window may include: determining a lower boundary of the first transmission window of the second data according to the formula K+NL, and determining an upper boundary of the first transmission window of the second data according to the formula K+N, Where K represents the first transmission time, N represents the maximum delay between the second data and the first data, and L represents the length of the transmission window.

When the first data is the first uplink grant information, the base station may carry the length of the sending window and the maximum delay between the second data and the first data in the first uplink grant information. At this time, in step 22, the terminal parses the length of the sending window and the maximum delay parameter according to the first uplink grant information, and further according to the first sending time, the length of the preset sending window, and A maximum delay between the second data and the first data, and a first transmission window of the second data is calculated.

Step 23: Receive the second data in the first sending window.

Through the above steps, some embodiments of the present disclosure implement receiving the second data sent by the communication peer end in the first sending window, and implementing data receiving processing.

Here, when the first data is the first service data, in the above step 23, the feedback information of the first data is further received on the pre-configured transmission resource in the first transmission window. The feedback information of the first data specifically includes: indication information indicating current feedback data; ACK/NACK information indicating success or failure of reception of current feedback data. The indication information used to indicate the current feedback data may be a HARQ process ID corresponding to the current feedback data; or a transmission order identifier corresponding to the current feedback data.

Here, when the first data is the first uplink grant information, the first uplink grant information includes a transmission resource with an uplink grant, an uplink HARQ process ID, and redundancy version information; in the foregoing step 23, further receiving the display And determining, by the uplink or the uplink, the uplink HARQ process ID, and determining the uplink grant corresponding to the uplink HARQ process ID, and parsing the first uplink data according to the uplink resource and the parameter of the uplink grant.

Similarly, some embodiments of the present disclosure may further add a determining step after step 21 to determine whether to adopt the receiving scheme shown in FIG. 2. For example, after the foregoing step 21, some embodiments of the present disclosure may further determine whether the first service corresponding to the first data is configured with a low delay transmission function: if yes, enter the steps 22-23 to pass the first The receiving window receives the second data; otherwise, determining the first sending time corresponding to the first sending time according to the preset fixed feedback timing relationship, and receiving the second data when the first sending time arrives. Here, the first sending time and the receiving of the second data may be determined according to a similar implementation manner of the related art, and details are not described herein again.

The above embodiments will be described in more detail below in conjunction with the HARQ feedback scenario and the uplink data transmission scenario.

HARQ feedback scenario:

Some embodiments of the present disclosure can shorten the delay of certain services (such as low-latency and high-reliability services) by using a HARQ feedback mechanism based on a transmission window. The following describes an LTE system as an example. The frame position is used to characterize.

As shown in FIG. 3, for each downlink subframe K _DL that requires HARQ feedback, the network side and the terminal side may preset an upper limit N _{DL of the} interval between the subframe M _DL and the downlink subframe K _DL corresponding to the HARQ feedback ( That is, the maximum delay between the second data and the first data) and the transmission window length L _{DL of the} HARQ feedback. The preset parameters may be configured in advance at the base station and the terminal, or may be configured by the base station in advance through signaling messages. Therefore, the base station and the terminal can calculate the transmission window of the downlink HARQ feedback information as K _DL +N _DL -L _DL <M _DL <=K _DL +N _DL according to the preset parameter, and the terminal can perform HARQ in the foregoing transmission window. For the transmission of the feedback information, the base station can receive the HARQ feedback information in the above transmission window.

As shown in FIG. 4, for each uplink subframe K _UL that requires HARQ feedback, the network side and the terminal side may preset an upper limit N _{UL of the} interval between the subframe M _UL and the subframe K _UL corresponding to the HARQ feedback (ie, maximum delay between a first data and the second data) and a transmission window length L _UL HARQ feedback. The preset parameters may be configured in advance at the base station and the terminal, or may be configured by the base station in advance through signaling messages. Therefore, the base station and the terminal can calculate the uplink HARQ transmission window M _UL as K _UL +N _UL -L _UL <M _UL <=K _UL +N _UL according to the preset parameter, and then the base station can perform HARQ in the foregoing transmission window. For the transmission of the feedback information, the terminal may receive the HARQ feedback information in the above transmission window.

The above scheme extends the fixed HARQ feedback time to a time window of HARQ feedback. If the terminal or base station has faster processing capability, the terminal/base station may be allowed to transmit HARQ feedback in advance within the HARQ feedback time window. The above scheme gives the time window range of the HARQ feedback time, and the specific HARQ feedback time is not determined. Compared with the fixed HARQ feedback timing in the related art, the present scheme makes the air interface transmission time HARQ feedback time point of different services of different users flexible. The terminal and the base station can report the HARQ feedback result as soon as possible according to the processing capability of the terminal, and feedback the HARQ information in time to reduce the data delay.

In order to ensure the correct resolution of the HARQ feedback and reduce the impact on the fixed-time HARQ feedback, on the one hand, for the low-latency and high-reliability services, the reliability of the transmission of the feedback information needs to be improved, for example, using the HARQ feedback information to repeat in the transmission window multiple times. Send by sending method. On the other hand, based on the related art HARQ feedback information transmission, the transmission mechanism of the HARQ feedback can be increased.

For flexible dynamic HARQ feedback of some embodiments of the present disclosure, a fixed transmission resource may be configured in advance in the transmission window of the HARQ feedback to carry the HARQ feedback information. The configuration of the specific transmission resource can be implemented by MAC layer signaling or RRC signaling. By configuring a fixed transmission resource, the reception processing of the HARQ feedback information in the transmission window can be simplified, the reception complexity is reduced, and the reception success rate is improved.

2. For flexible and dynamic HARQ feedback of some embodiments of the present disclosure, it is also possible to redesign the content contained in the HARQ feedback information. Specifically, some embodiments of the present disclosure may increase data corresponding to the HARQ feedback in the feedback content. The correspondence between the HARQ feedback and the data can be marked in multiple ways: one is to identify by the HARQ process ID, and the other is to identify the HARQ information that needs to be fed back in the order in which the corresponding data is sent. The sequential identification of the secondary feedback data. The above two marking methods are merely illustrative, and the disclosure is not limited thereto.

Upstream data transmission scenario:

In the related art LTE system, the time interval between uplink resource allocation and uplink data transmission is usually fixed. As shown in the following Table 3, the uplink grant information received by the subframe n corresponds to the uplink data on the air interface subframe n+k, and the interval between the uplink grant and the uplink data is a fixed interval.

Table 3: Interval k for uplink grant and uplink data transmission in TDD

In order to further reduce the air interface delay, some embodiments of the present disclosure provides a data transfer method, assuming that the uplink grant in subframe K _DCI information received, the predetermined uplink data transmission sub-frame among sub-frame K _DCI The upper limit of the interval N _UL (that is, the maximum delay between the second data and the first data) and the length L _DCI of the transmission window of the uplink data, then, as shown in FIG. 5, the time of the transmission window of the uplink data can be calculated. r should satisfy K _DCI + N _{DCI -} L _DCI < r <= K _DCI + N _DCI . The base station may configure a length of the uplink data transmission window for the terminal when transmitting the uplink authorization information. Specifically, the length of the sending window and the maximum delay between the second data and the first data may be carried in the uplink authorization information. And other parameters. In this way, the terminal may extract the foregoing parameters from the uplink grant information, and further determine the sending window to perform uplink data transmission.

In addition, the foregoing solution changes the uplink data to the non-fixed timing transmission, and becomes the uplink asynchronous HARQ. In some embodiments of the present disclosure, the uplink HARQ process ID and the redundancy version (RV) information may be added to the uplink authorization information sent by the base station. In addition, the terminal explicitly or implicitly indicates the uplink HARQ process ID in the sent uplink data. In this way, when receiving the uplink data, the base station first determines whether there is uplink data, and if so, parses the uplink transmission resource and parameters carried in the uplink grant information corresponding to the HARQ process ID.

Some embodiments of the present disclosure further increase the configuration of fast HARQ feedback and fast uplink scheduling functions, as different services have different requirements for delay. Only the above functions are enabled, and some embodiments of the present disclosure perform the fast HARQ feedback processing and the fast uplink data scheduling processing according to the foregoing process of FIG. 1 or FIG. 2; if the foregoing functions are not enabled, the implementation may be implemented according to the prior art implementation manner. HARQ feedback or uplink data scheduling processing with fixed timing relationships. With this feature configuration, backward compatibility with existing solutions can be achieved.

The data transmission method of some embodiments of the present disclosure has been described above. Further provided below is an apparatus for carrying out the above method. Referring to FIG. 6, a data transmission apparatus provided by some embodiments of the present disclosure includes:

a first receiving unit 61, configured to receive first data, and record a first sending time of the first data;

The first determining unit 62 is configured to determine a first sending window of the second data according to the first sending time, a length of the preset sending window, and a maximum delay between the second data and the first data;

a first sending unit 63, configured to send the second data in the first sending window;

The second data is feedback information of the first service data when the first data is the first service data, and the second data is the first data when the first data is the first uplink authorization information. The first uplink data corresponding to the uplink grant information.

Specifically, the data transmission device may be configured on the base station side, where the first data is the first service data (specifically, the uplink service data of the first service), and the second data is the first service data. Feedback information. The data transmission device may be configured on the terminal side. In this case, the first data is the first service data (specifically, the downlink service data of the first service), and the second data is the feedback of the first service data. The first data is the first uplink authorization information, and the second data is the first uplink data corresponding to the first uplink authorization information.

Here, the first determining unit is specifically configured to determine a lower boundary of the first sending window of the second data according to the formula K+NL, and determine the first sending window of the second data according to the formula K+N a boundary, where K represents the first transmission time, N represents the maximum delay between the second data and the first data, and L represents the length of the transmission window.

When the first data is the first service data, the first sending unit is further configured to: in the first sending window, send the feedback information of the first data multiple times, and The feedback information of the first data is carried on a pre-configured transmission resource in the first transmission window. Specifically, the feedback information of the first data may include: indication information indicating current feedback data; ACK/NACK information indicating success or failure of reception of current feedback data, and the like. The indication information for indicating the current feedback data may include: a HARQ process ID corresponding to the current feedback data; or a transmission sequence identifier corresponding to the currently fed back data.

When the first data is the first uplink authorization information, the first uplink authorization information includes an uplink authorized transmission resource, an uplink HARQ process ID, and redundancy version information; the first sending unit is further used. Transmitting the first uplink data in the first sending window, and explicitly or implicitly sending the uplink HARQ process ID.

Further, the above data transmission device further includes:

a determining unit, configured to: after the first receiving unit receives the first data, and records the first sending time of the first data, determining whether the first service corresponding to the first data is configured with a low delay transmission function: if yes, Then triggering the first determining unit, otherwise triggering the second determining unit;

a second determining unit, configured to determine, according to a preset fixed feedback timing relationship, a first sending time corresponding to the first sending time;

And a second sending unit, configured to send the second data when the first sending time arrives.

Referring to FIG. 7, some embodiments of the present disclosure further provide another data transmission apparatus, including:

The sending unit 71 is configured to send the first data, and record the first sending time of the first data.

The first determining unit 72 is configured to determine a first sending window of the second data according to the first sending time, a length of the preset sending window, and a maximum delay between the second data and the first data;

The first receiving unit 73 is configured to receive the second data in the first sending window.

The second data is feedback information of the first service data when the first data is the first service data, and the second data is the first data when the first data is the first uplink authorization information. The first uplink data corresponding to the uplink grant information.

Specifically, the data transmission device may be configured on the base station side, where the first data is the first service data (specifically, the uplink service data of the first service), and the second data is the first service data. The first data is the first uplink authorization information, and the second data is the first uplink data corresponding to the first uplink authorization information. The data transmission device may be configured on the terminal side. In this case, the first data is the first service data (specifically, the downlink service data of the first service), and the second data is the feedback of the first service data. information.

Here, the first determining unit is specifically configured to determine a lower boundary of the first sending window of the second data according to the formula K+NL, and determine the first sending window of the second data according to the formula K+N a boundary, where K represents the first transmission time, N represents the maximum delay between the second data and the first data, and L represents the length of the transmission window.

In some embodiments of the present disclosure, when the first data is the first service data, the first receiving unit 73 further receives the first data on a pre-configured transmission resource in the first sending window. Feedback information. The feedback information of the first data specifically includes: indication information indicating current feedback data; ACK/NACK information indicating success or failure of reception of current feedback data. The indication information used to indicate the current feedback data may be a HARQ process ID corresponding to the current feedback data; or a transmission order identifier corresponding to the current feedback data.

Here, when the first data is the first uplink grant information, the first uplink grant information includes a transmission resource with an uplink grant, an uplink HARQ process ID, and redundancy version information; the first receiving unit 73 further receives The uplink HARQ process ID is explicitly or implicitly transmitted, and the uplink grant corresponding to the uplink HARQ process ID is determined, and the first uplink data is parsed according to the uplink resource and the parameter of the uplink grant.

Further, the above data transmission device may further include the following units:

a determining unit, configured to: after the first sending time of the first data is sent by the sending unit, determining whether the first service corresponding to the first data is configured with a low delay transmission function: if yes, triggering a first determining unit, otherwise triggering the second determining unit;

a second determining unit, configured to determine, according to a preset fixed feedback timing relationship, a first sending time corresponding to the first sending time;

And a second sending unit, configured to receive the second data when the first sending time arrives.

In summary, the data transmission method and the data transmission apparatus provided by some embodiments of the present disclosure can reduce the air interface delay from shortening the HARQ feedback time and reducing the uplink grant to the uplink data transmission interval. Compared with the existing fixed feedback time and the fixed uplink sending interval, the embodiment of the present disclosure can flexibly select the feedback time of the HARQ and the sending time of the uplink MAC PDU according to the processing capability of the terminal and the base station, so as to reduce the low latency and high reliability. Technical support for data latency of the business. In addition, the embodiments of the present disclosure may also perform fast scheduling or fast feedback for low-latency and high-reliability services according to requirements, and may not open fast scheduling or fast feedback functions for common services, so as to achieve backward compatibility with common services.

The above is a preferred embodiment of the present disclosure, and it should be noted that those skilled in the art can also make several improvements and refinements without departing from the principles of the present disclosure. It should also be considered as the scope of protection of the present disclosure.

Claims (26)

A data transmission method includes: Receiving the first data, and recording the first sending time of the first data; Determining, according to the first sending time, a length of a preset sending window, and a maximum delay between the second data and the first data, a first sending window of the second data; Transmitting the second data in the first sending window; The second data is feedback information of the first service data when the first data is the first service data, and the second data is the first data when the first data is the first uplink authorization information. The first uplink data corresponding to the uplink grant information. The method of claim 1, wherein the determining the second data is based on the first transmission time, a length of a preset transmission window, and a maximum delay between the second data and the first data The steps of a send window include: Determining a lower boundary of the first transmission window of the second data according to the formula K+NL, and determining an upper boundary of the first transmission window of the second data according to the formula K+N, where K represents the first transmission time, N Indicates the maximum delay between the second data and the first data, and L represents the length of the transmission window. The method of claim 1, wherein when the first data is the first service data, the step of transmitting the second data in the first transmission window comprises: at the first In the transmission window, the feedback information of the first data is sent multiple times. The method of claim 1, wherein when the first data is the first service data, the step of transmitting the second data in the first transmission window comprises: at the first The feedback information of the first data is carried on a pre-configured transmission resource in the sending window. The method of claim 1, wherein the feedback information of the first data comprises: indication information indicating current feedback data; ACK/NACK information indicating success or failure of reception of currently fed back data. The method of claim 5, wherein the indication information for indicating the currently fed back data comprises: a HARQ process number corresponding to the currently fed back data; or a transmission order identifier corresponding to the currently fed back data. The method of claim 1, wherein, when the first data is the first uplink grant information, the first uplink grant information includes a transmission resource with an uplink grant, an uplink HARQ process ID, and redundancy version information; The transmitting the second data in the first sending window includes: transmitting the first uplink data in the first sending window, and explicitly or implicitly sending the uplink HARQ process ID. The method according to any one of claims 1 to 7, wherein after the step of receiving the first data and recording the first transmission time of the first data, the method further comprises: Determining whether the first service corresponding to the first data is configured with a low delay transmission function: If yes, the step of determining the first sending window of the second data according to the first sending time, the length of the preset sending window, and the maximum delay between the second data and the first data; Otherwise, according to the preset fixed feedback timing relationship, the first sending time corresponding to the first sending time is determined, and the second data is sent when the first sending time arrives. A data transmission method includes: Sending the first data, recording the first sending time of the first data; Determining, according to the first sending time, a length of a preset sending window, and a maximum delay between the second data and the first data, a first sending window of the second data; Receiving the second data in the first sending window; The second data is feedback information of the first service data when the first data is the first service data, and the second data is the first data when the first data is the first uplink authorization information. The first uplink data corresponding to the uplink grant information. The method of claim 9, wherein the determining the second data is based on the first transmission time, a length of a preset transmission window, and a maximum delay between the second data and the first data The steps of a send window include: Determining a lower boundary of the first transmission window of the second data according to the formula K+NL, and determining an upper boundary of the first transmission window of the second data according to the formula K+N, where K represents the first transmission time, N Indicates the maximum delay between the second data and the first data, and L represents the length of the transmission window. The method of claim 9, wherein after the step of transmitting the first data and recording the first transmission time of the first data, the method further comprises: Determining whether the first service corresponding to the first data is configured with a low delay transmission function: If yes, the step of determining the first sending window of the second data according to the first sending time, the length of the preset sending window, and the maximum delay between the second data and the first data; Otherwise, according to the preset fixed feedback timing relationship, the first sending time corresponding to the first sending time is determined, and the second data is received when the first sending time arrives. A data transmission device comprising: a first receiving unit, configured to receive first data, and record a first sending time of the first data; a first determining unit, configured to determine, according to the first sending time, a length of a preset sending window, and a maximum delay between the second data and the first data, a first sending window of the second data; a first sending unit, configured to send the second data in the first sending window; The second data is feedback information of the first service data when the first data is the first service data, and the second data is the first data when the first data is the first uplink authorization information. The first uplink data corresponding to the uplink grant information. The data transmission device according to claim 12, wherein the first determining unit is specifically configured to determine a lower boundary of the first transmission window of the second data according to the formula K+NL, and according to the formula K+N, Determining an upper boundary of the first transmission window of the second data, wherein K represents a first transmission time, N represents a maximum delay between the second data and the first data, and L represents a length of the transmission window. The data transmission device according to claim 12, wherein, when the first data is the first service data, the first sending unit is further configured to send the plurality of times in the first transmission window Feedback information of the first data. The data transmission device according to claim 12, wherein, when the first data is the first service data, the first transmitting unit is further configured to pre-configured transmission resources in the first transmission window The feedback information of the first data is carried on. The data transmission device according to claim 12, wherein the feedback information of the first data comprises: indication information indicating current feedback data; ACK/NACK indicating success or failure of reception of currently fed back data information. The data transmission device according to claim 16, wherein the indication information for indicating the currently fed back data comprises: a HARQ process number corresponding to the currently fed back data; or a transmission order identifier corresponding to the currently fed back data. The data transmission device according to claim 12, wherein, when the first data is the first uplink grant information, the first uplink grant information includes a transmission resource with an uplink grant, an uplink HARQ process ID, and a redundancy version. The first sending unit is further configured to send the first uplink data in the first sending window, and send the uplink HARQ process ID explicitly or implicitly. The data transmission device according to any one of claims 12 to 18, further comprising: a determining unit, configured to: after the first receiving unit receives the first data, and records the first sending time of the first data, determining whether the first service corresponding to the first data is configured with a low delay transmission function: if yes, Then triggering the first determining unit, otherwise triggering the second determining unit; a second determining unit, configured to determine, according to a preset fixed feedback timing relationship, a first sending time corresponding to the first sending time; And a second sending unit, configured to send the second data when the first sending time arrives. A data transmission device comprising: a sending unit, configured to send the first data, and record a first sending time of the first data; a first determining unit, configured to determine, according to the first sending time, a length of a preset sending window, and a maximum delay between the second data and the first data, a first sending window of the second data; a first receiving unit, configured to receive the second data in the first sending window; The second data is feedback information of the first service data when the first data is the first service data, and the second data is the first data when the first data is the first uplink authorization information. The first uplink data corresponding to the uplink grant information. The data transmission device according to claim 20, wherein the first determining unit is specifically configured to determine a lower boundary of the first transmission window of the second data according to the formula K+NL, and according to the formula K+N, Determining an upper boundary of the first transmission window of the second data, wherein K represents a first transmission time, N represents a maximum delay between the second data and the first data, and L represents a length of the transmission window. The data transmission device of claim 20, further comprising: a determining unit, configured to: after the first sending time of the first data is sent by the sending unit, determining whether the first service corresponding to the first data is configured with a low delay transmission function: if yes, triggering a first determining unit, otherwise triggering the second determining unit; a second determining unit, configured to determine, according to a preset fixed feedback timing relationship, a first sending time corresponding to the first sending time; And a second sending unit, configured to receive the second data when the first sending time arrives. A data transmission device comprising a processor, a transceiver and a memory; The processor is configured to read a program in the memory and perform the following process: Receiving the first data, and recording the first sending time of the first data; Determining, according to the first sending time, a length of a preset sending window, and a maximum delay between the second data and the first data, a first sending window of the second data; Transmitting the second data in the first sending window; The second data is feedback information of the first service data when the first data is the first service data, and the second data is the first data when the first data is the first uplink authorization information. First uplink data corresponding to an uplink grant information; The transceiver is configured to receive and transmit data; The memory is used to store data used by the processor to perform operations. A data transmission device comprising a processor, a transceiver and a memory; The processor is configured to read a program in the memory and perform the following process: Sending the first data, recording the first sending time of the first data; Determining, according to the first sending time, a length of a preset sending window, and a maximum delay between the second data and the first data, a first sending window of the second data; Receiving the second data in the first sending window; The second data is feedback information of the first service data when the first data is the first service data, and the second data is the first data when the first data is the first uplink authorization information. First uplink data corresponding to an uplink grant information; The transceiver is configured to receive and transmit data; The memory is used to store data used by the processor to perform operations. A non-transitory computer readable storage medium storing computer readable instructions executable by a processor, the processor performing the following operations when the computer readable instructions are executed by a processor: Receiving the first data, and recording the first sending time of the first data; Determining, according to the first sending time, a length of a preset sending window, and a maximum delay between the second data and the first data, a first sending window of the second data; Transmitting the second data in the first sending window; The second data is feedback information of the first service data when the first data is the first service data, and the second data is the first data when the first data is the first uplink authorization information. The first uplink data corresponding to the uplink grant information. A non-transitory computer readable storage medium storing computer readable instructions executable by a processor, the processor performing the following operations when the computer readable instructions are executed by a processor: Sending the first data, recording the first sending time of the first data; Determining, according to the first sending time, a length of a preset sending window, and a maximum delay between the second data and the first data, a first sending window of the second data; Receiving the second data in the first sending window; The second data is feedback information of the first service data when the first data is the first service data, and the second data is the first data when the first data is the first uplink authorization information. The first uplink data corresponding to the uplink grant information.

Images