CN115174030B

CN115174030B - Low-delay data transmission method and device

Info

Publication number: CN115174030B
Application number: CN202211029233.5A
Authority: CN
Inventors: 倪浩; 孙涛; 毛敏; 聂聪
Original assignee: Beijing Neuron Network Technology Co ltd
Current assignee: Beijing Neuron Network Technology Co ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2024-03-05
Anticipated expiration: 2042-08-26
Also published as: CN115174030A

Abstract

The embodiment of the application relates to the technical field of communication, and relates to a data transmission method and device. The specific scheme is as follows: detecting burst data transmission demand reporting information from a user terminal; under the condition that the information reporting requirement of burst data transmission is detected, adding a downlink transmission block ending instruction to the end of a downlink transmission code block; the downlink transmission block end indication is used for indicating to convert downlink resources into uplink resources for burst data transmission; inserting uplink scheduling information after the downlink transmission block end indication; the uplink scheduling information is used for indicating time-frequency resources occupied by uplink transmission of burst data after conversion to the user terminal. According to the embodiment of the application, the downlink transmission block end indication is utilized to convert downlink resources into uplink resources for burst service data transmission, the uplink scheduling information is utilized to schedule burst service data transmission, resources can be allocated for services in a targeted manner according to requirements, the influence of burst data on a system is reduced, transmission delay is reduced, and transmission efficiency is improved.

Description

Low-delay data transmission method and device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a data transmission method and apparatus.

Background

The main duplex system in the wireless communication system mainly comprises: a time division duplex system, a frequency division duplex system, etc. The wireless time division duplex system is characterized in that uplink transmission and downlink transmission occupy mutually non-overlapping time slices respectively, so that the mutual interference of the uplink transmission and the downlink transmission is avoided. When the user terminal has data to be transmitted to the base station, the user terminal can send scheduling request (SR, scheduling request) information to an uplink control channel (PUCCH, physical Uplink Control Channel), and request the base station to perform uplink transmission scheduling through the SR triggering uplink transmission process. The user terminal applies for the uplink and downlink signaling interaction process through the SR, so that larger transmission delay is caused. The base station side can reduce the transmission delay caused by the signaling process by configuring the predefined semi-continuous time-frequency resource for the user terminal. However, the manner of configuring time-frequency resources for the user terminal generally results in a decrease in system resource utilization and a decrease in communication efficiency for the user terminal having burst characteristics of data or uneven data time domain distribution.

Disclosure of Invention

In view of the above problems in the prior art, embodiments of the present application provide a low-latency data transmission method and apparatus. In the embodiment of the application, under the condition that the information reporting requirement of the burst data transmission is detected, a part of downlink resources are converted into uplink resources for burst service data transmission by using the downlink transmission block end indication, and the burst service data transmission is dynamically scheduled by using the uplink scheduling information, so that the resources can be allocated for the service in a targeted manner according to the requirement, the influence of the burst data on other users and services in the system is reduced or avoided, the transmission delay of a communication system is reduced, and the data transmission efficiency is improved.

To achieve the above object, a first aspect of the present application provides a low-latency data transmission method, including:

detecting burst data transmission demand reporting information from a user terminal;

under the condition that the information reporting the burst data transmission requirement is detected, adding a downlink transmission block ending instruction to the end of a downlink transmission code block; the downlink transmission block end indication is used for indicating to convert downlink resources into uplink resources for burst data transmission;

inserting uplink scheduling information after the downlink transmission block end indication; the uplink scheduling information is used for indicating time-frequency resources occupied by uplink transmission of the burst data after the conversion to the user terminal.

As a possible implementation manner of the first aspect, the method further includes:

configuring resources for transmitting the burst data transmission requirement reporting information aiming at a specific user terminal; the specific user terminal is a user terminal with a specific delay and a specific data traffic demand service, or the specific user terminal comprises at least one of the following:

a user terminal having a logical channel with a specific identification number;

a user terminal of a logical channel group having a specific identification number;

Wherein the logical channels and logical channel groups indicated by the specific identification number correspond to traffic having a specific delay and specific data traffic requirements.

As a possible implementation manner of the first aspect, the specific delay includes a data delay being lower than a first set threshold; the particular data traffic demand includes a maximum data burst size below a second set threshold.

As a possible implementation manner of the first aspect, the configuring, for a specific user terminal, a resource for sending the burst data transmission requirement reporting information includes:

in the downlink guard band, dividing the resources of specific frequency domain positions and widths; or, outside the downlink frequency band, dividing the resources with specific frequency domain positions and widths;

and allocating the resources with the specific frequency domain position and width to the specific user terminal through semi-static signaling.

As a possible implementation manner of the first aspect, the detecting the reporting information of the burst data transmission requirement from the user terminal includes:

receiving data on resources used for sending the reporting information of the burst data transmission requirement in each OFDM symbol time in a downlink time slice;

reporting the burst data transmission requirement of the cell corresponding to the user terminal to an information sequence, and performing correlation operation with the received data;

And under the condition that the correlation operation result is larger than or equal to a preset threshold value, determining that the received data is the burst data transmission requirement reporting information sent by the user terminal.

As a possible implementation manner of the first aspect, before the end of the code block of the downlink transmission appends the downlink transmission block end indication, the method further includes:

determining the size of a transmission block of the user terminal;

calculating the size of each code block according to the number of the resource elements in the unit time slice after the conversion and the downlink transmission target code rate;

and carrying out code block division on the transmission block again according to the size of the code block, so that all the code blocks in the transmission block are aligned with the unit time slices after conversion.

and when the dynamic downlink control information is used for downlink transmission scheduling, indicating the number of the resource elements in the unit time slices after the conversion and the size of the code block in the signaling of the downlink control information.

As a possible implementation manner of the first aspect, the appending a downlink transmission block end indication at a code block end of a downlink transmission includes:

On the code block of the unit time slice of the current downlink transmission, partial time-frequency resources with specific quantity and/or specific position on the unit time slice are not occupied by downlink data by using a puncturing or rate matching mode;

and sending the downlink transmission block ending indication on the time-frequency resource which is not occupied by the downlink data.

A second aspect of the present application provides a low latency data transmission method, including:

transmitting the reporting information of the burst data transmission requirement to the base station;

detecting whether a downlink transmission block ending instruction exists in a downlink transmission time slice;

analyzing uplink scheduling information in a time slice of downlink transmission under the condition that a downlink transmission block ending instruction exists in the time slice;

and carrying out burst data uplink transmission on the time-frequency resource indicated by the uplink scheduling information.

As a possible implementation manner of the second aspect, the sending the burst data transmission requirement reporting information to the base station includes:

acquiring configuration information from semi-static signaling from a base station, wherein the configuration information is a specific frequency domain position and width resource divided by the base station in a downlink guard band or outside the downlink band;

And transmitting the resources of the reporting information of the burst data transmission requirement by utilizing the divided resources with the specific frequency domain position and width.

A third aspect of the present application provides a low latency data transmission apparatus, comprising:

the first detection unit is used for detecting the reporting information of the burst data transmission requirement from the user terminal;

the first indication unit is used for adding a downlink transmission block ending indication to the end of a downlink transmission code block under the condition that the information reporting the burst data transmission requirement is detected; the downlink transmission block end indication is used for indicating to convert downlink resources into uplink resources for burst data transmission;

a second indication unit, configured to insert uplink scheduling information after the downlink transport block end indication; the uplink scheduling information is used for indicating time-frequency resources occupied by uplink transmission of the burst data after the conversion to the user terminal.

As a possible implementation manner of the third aspect, the apparatus further includes a configuration unit, where the configuration unit is configured to:

A user terminal having a logical channel with a specific identification number;

As a possible implementation manner of the third aspect, the specific delay includes a data delay being lower than a first set threshold; the particular data traffic demand includes a maximum data burst size below a second set threshold.

As a possible implementation manner of the third aspect, the configuration unit is configured to:

As a possible implementation manner of the third aspect, the first detection unit is configured to:

As a possible implementation manner of the third aspect, the apparatus further includes a code block dividing unit, where the code block dividing unit is configured to:

determining the size of a transmission block of the user terminal before a downlink transmission block ending instruction is added to the end of a code block of downlink transmission;

As a possible implementation manner of the third aspect, the code block dividing unit is further configured to:

As a possible implementation manner of the third aspect, the first indication unit is further configured to:

A fourth aspect of the present application provides a low latency data transmission apparatus, comprising:

the sending unit is used for sending the reporting information of the burst data transmission requirement to the base station;

a second detecting unit, configured to detect whether a downlink transmission block end indication exists in a downlink transmission time slice;

the analyzing unit is used for analyzing the uplink scheduling information in the time slices when the downlink transmission time slices are detected to have the downlink transmission block ending indication;

and the transmission unit is used for carrying out burst data uplink transmission on the time-frequency resource indicated by the uplink scheduling information.

As a possible implementation manner of the fourth aspect, the sending unit is configured to:

A fifth aspect of the present application provides a computing device comprising:

a communication interface;

at least one processor coupled to the communication interface; and

at least one memory coupled to the processor and storing program instructions that, when executed by the at least one processor, cause the at least one processor to perform the method of any of the first or second aspects above.

A sixth aspect of the present application provides a computer readable storage medium having stored thereon program instructions which when executed by a computer cause the computer to perform the method of any of the first or second aspects above.

These and other aspects of the invention will be apparent from and elucidated with reference to the embodiment(s) described hereinafter.

Drawings

The various features of the invention and the connections between the various features are further described below with reference to the figures. The figures are exemplary, some features are not shown in actual scale, and some features that are conventional in the art to which this application pertains and are not essential to the application may be omitted from some figures, or features that are not essential to the application may be additionally shown, and combinations of the various features shown in the figures are not meant to limit the application. In addition, throughout the specification, the same reference numerals refer to the same. The specific drawings are as follows:

Fig. 1 is a schematic diagram of an uplink transmission timing;

FIG. 2 is a schematic diagram of an embodiment of a low latency data transmission method according to the present disclosure;

FIG. 3 is a schematic diagram of an embodiment of a low latency data transmission method according to the present disclosure;

FIG. 4 is a schematic diagram of an embodiment of a low latency data transmission method according to the present disclosure;

FIG. 5 is a schematic diagram of an embodiment of a low latency data transmission device according to an embodiment of the present application;

FIG. 6 is a schematic diagram of an embodiment of a low latency data transmission device according to an embodiment of the present application;

FIG. 7 is a schematic diagram of an embodiment of a low latency data transmission device according to an embodiment of the present application;

fig. 8 is a schematic diagram of a computing device provided in an embodiment of the present application.

Detailed Description

The terms first, second, third, etc. or module a, module B, module C, etc. in the description and in the claims, etc. are used solely for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order, as may be appreciated, if permitted, to interchange particular orders or precedence orders to enable embodiments of the present application described herein to be implemented in orders other than those illustrated or described herein.

In the following description, reference numerals indicating steps such as S110, S120, … …, etc. do not necessarily indicate that the steps are performed in this order, and the order of the steps may be interchanged or performed simultaneously as allowed.

The term "comprising" as used in the description and claims should not be interpreted as being limited to what is listed thereafter; it does not exclude other elements or steps. Thus, it should be interpreted as specifying the presence of the stated features, integers, steps or components as referred to, but does not preclude the presence or addition of one or more other features, integers, steps or components, or groups thereof. Thus, the expression "a device comprising means a and B" should not be limited to a device consisting of only components a and B.

Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment, but may. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments as would be apparent to one of ordinary skill in the art from this disclosure.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. If there is a discrepancy, the meaning described in the present specification or the meaning obtained from the content described in the present specification is used. In addition, the terminology used herein is for the purpose of describing embodiments of the present application only and is not intended to be limiting of the present application. For the purpose of accurately describing the technical content of the present application, and for the purpose of accurately understanding the present invention, the terms used in the present specification are given the following explanation or definition before the explanation of the specific embodiments:

1) Qos (Quality of Service ): the network can utilize various basic technologies to provide better service capability for specified network communication, is a security mechanism of the network, and is a technology for solving the problems of network delay, blocking and the like. QoS guarantees are important for capacity limited networks, especially for streaming multimedia applications, because these applications often require a fixed transmission rate and are also relatively delay sensitive.

2) Air port: is commonly known as an air interface. In wireless communication technology, an "air interface" defines the specification of the radio link between a terminal device and a network device, making wireless communication as reliable as wired communication. In mobile device transmissions, the air interface is a link between a mobile terminal user and a base station through wireless communications. In a mobile phone, the air interface represents the radio transmission specification between the base station and the mobile phone, which defines the frequency and bandwidth of use of each radio channel, or defines the coding method employed. In 5G and LTE (Long Term Evolution ), air interface transmission is an interface between a terminal and an access network, for short, an air interface, such as a wireless interface between a mobile phone and a base station.

3) FR (Frequency Range): the 5G spectrum is divided into two regions FR1 and FR2. The frequency range of FR1 is 450MHz to 6GHz, also known as: sub 6GHz (frequency band below 6 GHz). The frequency range of FR2 is 24.25GHz to 52.6GHz, also known as: millimeter wave (mmWave).

4) OFDM (Orthogonal Frequency Division Multiplexing ): OFDM, an orthogonal frequency division multiplexing technique, is one type of MCM (Multi Carrier Modulation, multi-carrier modulation). OFDM realizes parallel transmission of high-speed serial data by frequency division multiplexing. The multi-path access method has better multi-path fading resistance and can support multi-user access. The main idea of OFDM is: the channel is divided into a number of orthogonal sub-channels, and the high speed data signal is converted into parallel low speed sub-data streams, modulated onto each sub-channel for transmission. The orthogonal signals may be separated by employing correlation techniques at the receiving end, which may reduce mutual interference (ISI) between the sub-channels. The signal bandwidth on each sub-channel is less than the associated bandwidth of the channel, so that each sub-channel can be seen as flat fading, so that inter-symbol interference can be eliminated, and channel equalization is relatively easy since the bandwidth of each sub-channel is only a small fraction of the original channel bandwidth. An OFDM signal is made up of a plurality of subcarrier signals that are independently modulated by different modulation symbols. The carriers in OFDM are mutually orthogonal, each carrier has an integer number of carrier periods in one symbol time, and the spectrum zero point of each carrier is overlapped with the zero point of the adjacent carrier, so that the interference between the carriers is reduced. Because of the partial overlap between carriers, it improves the frequency band utilization over conventional FDMA (frequency division multiple access ).

5) MCS (Modulation and Coding Scheme, modulation and coding strategy): the configuration of the rate in LTE (Long Term Evolution ) is achieved by MCS index values. The MCS uses the factors affecting the communication rate concerned as columns of the table, and uses the MCS index as rows to form a rate table. Each MCS index corresponds to a physical transmission rate under a set of parameters.

The prior art method is described first, and then the technical scheme of the application is described in detail.

The main duplex system in the wireless communication system includes: a time division duplex system, a frequency division duplex system, etc. Taking a wireless cellular communication system as an example, the 2G communication system is a time division duplex system; WCDMA (Wideband Code Division Multiple Access ) communication systems are frequency division duplex systems; both the 4G LTE (Long Term Evolution ) communication system and the 5G communication system include both time division duplexing and frequency division duplexing.

The wireless time division duplex system is characterized in that uplink transmission and downlink transmission occupy mutually non-overlapping time slices respectively, so that the mutual interference of the uplink transmission and the downlink transmission is avoided.

When the base station has data to be transmitted to the terminal, the base station sends downlink scheduling information to the terminal in a downlink control channel (PDCCH, physical Downlink Control Channel), configures a downlink shared channel (PDSCH, physical Downlink Shared Channel) time-frequency resource occupied by transmission, a modulation coding mode, beam information, redundancy version, a hybrid automatic retransmission process and the like for downlink data transmission, and performs downlink data transmission on the PDSCH time-frequency resource indicated by the downlink control information in a mode indicated by the downlink control information.

When the user terminal has data to be transmitted to the base station, the user terminal can send scheduling request (SR, scheduling request) information to an uplink control channel (PUCCH, physical Uplink Control Channel), and request the base station to perform uplink transmission scheduling through the SR triggering uplink transmission process. After receiving the SR information, the base station transmits uplink scheduling grant (UL grant) information in a PDCCH channel, and configures uplink shared channel (PUSCH, physical Uplink Shared Channel) time-frequency resources occupied by transmission, modulation coding modes, redundancy versions, hybrid automatic retransmission processes and the like for uplink data transmission. After receiving the UL grant information in the PDCCH, the terminal performs uplink data transmission on PUSCH time-frequency resources indicated by the UL grant information in an indicating manner. Fig. 1 illustrates a procedure for triggering uplink transmission through an SR.

As shown in fig. 1, in the uplink transmission process of SR triggering, after data arrives at a user terminal buffer, it is first necessary to wait for the PUCCH resource available to the user to send an SR, where the waiting delay d1 is an uncertainty value and is related to the period of the PUCCH resource available to the user. After receiving the SR, the base station needs to process the delay d2 to send UL grant information to the terminal. After receiving the UL grant information, the terminal transmits uplink data on the PUSCH resource after the processing delay d 3. In the process, the SR transmission occupied time period τ1, the ul grant transmission occupied time period τ2, and the pusch transmission occupied time period τ3. In summary, the total transmission delay τ of data transmission on the air interface can be expressed by the following formula (1):

τ＝d1+τ1+d2+τ2+d3+τ3 (1)

In the LTE communication system, the minimum period of SR transmission is 1ms. Whereas the time slice of uplink transmission in LTE is a subframe (1 ms), the interval is also 1ms at minimum. The interval of the partially configured downlink and uplink subframes may be 5ms to 9ms. The processing delay d2 is typically around 3ms. The processing delay d3 is 3 ms-6 ms. The transmission delay of SR, UL grant, PUSCH is 1ms. According to formula (1), under different TDD (Time Division Duplexing, time division duplex) uplink and downlink configurations, even if a transmission configuration with reduced delay is adopted, the uplink air interface transmission delay of LTE is about 10ms at a minimum and about 23ms at a maximum.

In the 5G communication system, for example, FR1 and a subcarrier interval of 30kHz are used, and when Mini-slots (minislots) are not used, the unit of resource scheduling is a slot (slot) of 0.5ms length. The minimum processing delay d1 is 0.5ms, the processing delay d2 is about 1ms, and the minimum processing delay d3 is 0. The transmission delays of SR, UL grant, PUSCH are all 0.5ms. According to equation (1), in the best case, the uplink air interface transmission delay of LTE is a minimum of about 3ms.

In the prior art, the following methods are generally adopted to reduce the transmission delay of the air interface:

1) Mini-slot (micro time slot)

In order to reduce the transmission delay of the air interface, mini-slots are introduced in the 4G and 5G systems. Mini-slot realizes faster switching of uplink and downlink resources in time by reducing time units of uplink and downlink scheduling. In combination with the uplink transmission process described in fig. 1, when the uplink and downlink resource conversion interval becomes smaller, each processing delay and transmission delay are correspondingly reduced, so as to achieve the purpose of reducing the air interface transmission delay.

2) Semi-persistent scheduling

Semi-persistent scheduling (SPS) techniques have been introduced in 4G and 5G systems to reduce the air interface transmission delay. The technique semi-statically configures periodic transmission resources for a user terminal for a period of time through higher layer signaling and triggers in a semi-static or dynamic manner. And the user terminal receives downlink data on the configured periodic PDSCH time-frequency resource or transmits uplink data on the configured periodic PUSCH time-frequency resource in the configured time range. For uplink transmission, the base station configures time-frequency resources for the terminal, so that the base station does not need to apply for resource scheduling through SR or UL grant information, and therefore, the air interface time delay caused by the signaling process is reduced.

The prior art has the following defects:

(1) The Mini-slot technique has the following problems in practical application:

I. in order to avoid the interference of the downlink signal to the uplink signal, a guard time interval needs to be added to switch from the downlink time slice to the uplink time slice in the TDD system. Frequent uplink and downlink time slice switching can cause a large number of guard time intervals to be inserted, so that the utilization rate of system resources is reduced;

the smaller uplink and downlink time slice switching time interval provides greater challenges for the processing capacities of the base station and the terminal, and simultaneously increases the power consumption of the terminal and the base station equipment;

In order to increase the uplink and downlink switching speed and inhibit the reduction of the utilization rate of system resources as much as possible, the guard time interval needs to be configured as small as possible. However, the guard time interval is configured to be small, which may impose restrictions on the coverage of the cell.

(2) Semi-persistent scheduling

The problem with semi-persistent scheduling is mainly the difficulty in balancing latency with system resource utilization. Unless the base station knows the service data throughput of the user terminal, the base station has difficulty in configuring a proper time-frequency resource period so as to meet the service delay requirement, and the overall resource utilization rate of the system is not influenced by the configuration of excessive resources.

In summary, on the one hand, the uplink and downlink signaling interaction process is brought by the user terminal through the SR process of applying for PUSCH resources, which leads to a larger transmission delay under the communication scheme of dividing uplink and downlink resources in time slots, subframes, frames and other fixed-length time slice units. On the other hand, although the base station side can reduce the transmission delay caused by the signaling process by configuring the predefined semi-persistent time-frequency resource for the user terminal, the semi-persistent scheduling is only suitable for the service with fixed data rate, and the service with burst characteristics or uneven data time domain distribution is low in efficiency. The existing techniques for reducing the uplink and downlink resource conversion interval, such as Mini-slot, adopt a semi-static signaling notification frame structure, and can only integrally divide uplink and downlink time slices in the whole bandwidth or the whole bandwidth part (BWP), so that the method has influence on all service types and all user terminals, can cause the problem of resource waste of a guard interval caused by frequent uplink and downlink conversion of a large bandwidth, can cause power consumption, calculation power and other pressure to at least part of low-calculation-power terminals in a system, and can cause coverage problem to at least part of terminals.

Based on the technical problems in the prior art, the application provides a data transmission method. According to the method, under the condition that the information reported by the burst data transmission requirement is detected, a part of downlink resources are converted into uplink resources by using a downlink transmission block ending indication and are used for burst service data transmission, and the burst service data transmission is dynamically scheduled by using uplink scheduling information, so that the resources can be allocated for the service in a targeted manner according to the requirement, the influence of the burst data on other users and services in the system is reduced or avoided, the transmission delay of a communication system is reduced, and the data transmission efficiency is improved.

On one hand, the method does not need to configure smaller uplink and downlink time slices, so that the technical problems of system resource utilization rate reduction caused by frequent uplink and downlink time slice switching, power consumption increase of a terminal and base station equipment caused by smaller uplink and downlink time slice switching, cell coverage limitation caused by small configuration of a protection time interval and the like caused by Mini-slot technology are avoided.

On the other hand, in the method, when the user terminal has a burst data transmission requirement, the burst data transmission requirement reporting information can be sent to the base station. After detecting the information, the base station can configure uplink resources for the user terminal for burst data transmission. Therefore, the method can be used for pointedly distributing resources for the service according to the requirements, reduces or avoids the influence of the sudden data or the user terminal with uneven data time domain distribution on other users and services in the system, and can avoid the technical problems of system resource utilization rate reduction and communication efficiency reduction caused by semi-continuous scheduling in the prior art.

Fig. 2 is a schematic diagram of an embodiment of a data transmission method according to an embodiment of the present application. The data transmission method can be applied to the base station side. As shown in fig. 2, the method may include:

step S110, detecting the burst data transmission requirement reporting information from the user terminal;

step S120, under the condition that the information reporting the burst data transmission requirement is detected, adding a downlink transmission block ending instruction to the end of a downlink transmission code block; the downlink transmission block end indication is used for indicating to convert downlink resources into uplink resources for burst data transmission;

step S130, inserting uplink scheduling information after the downlink transmission block end indication; the uplink scheduling information is used for indicating time-frequency resources occupied by uplink transmission of the burst data after the conversion to the user terminal.

In an actual communication system, the arrival time of burst-type service data is not fixed. In the embodiment of the application, the base station may allocate resources for transmitting the reporting information of the burst data transmission requirement to the user terminal in advance. The user terminal with burst service data transmission requirement can send the reporting information of the burst service data transmission requirement at any time, and inform the base station of the service resource requirement. And the base station reports information according to the burst data transmission requirement, and attaches a downlink transmission block ending instruction to the end of the downlink transmission code block. The downlink transmission block end indication can be used as a conversion mark between downlink transmission and uplink transmission, dynamically converts a part of downlink resources into uplink resources for burst-type service data transmission, and inserts uplink scheduling information after the downlink transmission block end indication for scheduling the transmission of burst-type service data. By adopting the mode for data transmission, resources can be allocated for the service in a targeted manner according to the time-sensitive service requirement, and the influence of burst service data and data time domain distribution unevenness on other users and services in the system is reduced or avoided.

Specifically, in step S110, the base station detects the burst data transmission requirement reporting information on the resources allocated by the base station and used for the user terminal to send the burst data transmission requirement reporting information in the downlink transmission time slice, so as to determine whether the burst data transmission requirement reporting information sent by the user terminal exists on the allocated resources.

In step S120, the base station attaches a downlink transmission block end indication to the end of the downlink transmission code block when detecting the reporting information of the burst data transmission requirement. The downlink transmission block end indication is used for indicating to convert downlink resources into uplink resources for burst data transmission, namely, ending the downlink transmission occupying the resources needing downlink/uplink conversion so as to start the downlink/uplink conversion.

In step S130, the base station may further insert uplink scheduling information after the end instruction of the downlink transport block in case that the reporting information of the burst data transmission requirement is detected, so as to dynamically schedule uplink transmission after downlink/uplink conversion. Specifically, the base station may send uplink scheduling information of uplink transmission after the conversion on a time-frequency resource of a specific length and/or a specific position of a downlink/uplink conversion unit time slice into which a downlink transport block end instruction is currently inserted.

In one example, the base station may indicate at least one of each user terminal performing uplink transmission after downlink/uplink conversion, time-frequency resources occupied by each user terminal performing uplink transmission, MCS information of each uplink transmission, and an uplink procedure number used for transmission in the uplink scheduling information.

The base station may schedule preferentially user terminals having the following characteristics: the user terminal has a specific delay sensitive and data traffic QoS requiring traffic, or there is an active logical channel with a specific identification number, or there is an active logical channel group with a specific identification number.

In the embodiment of the application, under the condition that the information reporting requirement of the burst data transmission is detected, a part of downlink resources are converted into uplink resources for burst service data transmission by using the downlink transmission block end indication, and the burst service data transmission is dynamically scheduled by using the uplink scheduling information, so that the resources can be allocated for the service in a targeted manner according to the requirement, the influence of the burst data on other users and services in the system is reduced or avoided, the transmission delay of a communication system is reduced, and the data transmission efficiency is improved.

In one embodiment, the method further comprises:

a user terminal having a logical channel with a specific identification number;

In the embodiment of the application, the base station allocates resources for the user terminal to send the burst data transmission requirement reporting information for the service with specific delay sensitivity and data flow QoS requirement of the user terminal, or the activated logic channel with specific identification number exists, or the activated logic channel group with specific identification number exists, so that the terminal can send the burst data transmission requirement reporting information on the resources allocated by the base station.

In one embodiment, the particular latency includes a data latency below a first set threshold; the particular data traffic demand includes a maximum data burst size below a second set threshold.

In one example, the first set threshold is set to 50ms; the second set threshold is set to 128bytes. The traffic with specific delay sensitivity and data traffic QoS requirements may include traffic with the following characteristics: the packet delay budget is less than 50ms and the maximum data burst size is less than 128bytes.

In the embodiment of the present application, the base station side configures, for a user terminal with a delay-sensitive service, a resource for transmitting the burst data transmission requirement reporting information. After receiving the reporting information of the burst data transmission requirement, the base station can convert the uplink resource into the uplink resource for the burst data transmission. By adopting the mode to reasonably allocate the resources, the transmission delay can be effectively reduced. In addition, for a user terminal having a service with a high data burst amount, more resources need to be allocated to the user terminal to meet the transmission requirement of the data burst amount. Therefore, for a ue having a service with a high data burst size, the above manner of converting uplink resources into uplink resources may not meet the transmission requirement of the data burst size. In the embodiment of the application, the resource for sending the information reported by the burst data transmission requirement is configured for the user terminal with the service having the sensitivity to the time delay and the low data burst quantity, so that the transmission time delay can be effectively reduced, and the data transmission efficiency can be improved.

In one embodiment, the configuring the resource for sending the burst data transmission requirement reporting information for the specific user terminal includes:

Specifically, the base station divides the resources of the specific frequency domain position and width in the downlink guard band, and configures the resources of the specific frequency domain position and width to the specific user terminal through semi-static signaling. For example, the system uses an 18MHz effective downlink system bandwidth with 1MHz guard bands on each side. The base station marks out a physical resource block in the guard band of the low frequency side. In one example, the physical resource block may contain 12 consecutive subcarriers with 15kHz spacing. The base station informs the specific user terminal in the system of the location of the physical resource block.

Or the base station divides the resources of the specific frequency domain position and width outside the downlink frequency band, and allocates the resources of the specific frequency domain position and width to the specific user terminal through semi-static signaling. For example, the system divides a physical resource block in an uplink frequency band of a certain system, and notifies a specific user terminal in the system of the position of the physical resource block.

In one embodiment, the detecting the reporting information of the burst data transmission requirement from the user terminal includes:

The "burst data transmission requirement reporting information sequence" may be a Gold sequence or a Chu sequence. When a user terminal transmits data, orthogonal processing needs to be performed between the data to be transmitted and other user terminals. When receiving data, it is necessary to detect and restore the processed data, that is, to use the sequence corresponding to the cell of each user terminal to perform correlation operation with the received data to determine from which user terminal the received data comes. The result of the correlation operation represents the correlation of the received data with the local sequence. The preset threshold value may be preset, and the threshold value may be an empirical value. And judging whether the cell has the user terminal which sends the reporting information of the burst data transmission requirement or not through comparing the correlation operation result with a preset threshold value. And if the result of the correlation operation exceeds a preset threshold value, the base station receives the burst data transmission requirement reporting information sent by the user terminal.

Fig. 3 is a schematic diagram of an embodiment of a data transmission method according to an embodiment of the present application. As shown in fig. 3, in an embodiment, in step S120 of fig. 2, before the end of the downlink code block is added with the downlink end indication, the method further includes:

step S210, determining the size of a transmission block of the user terminal;

step S220, calculating the size of each code block according to the number of the resource elements in the unit time slice after the conversion and the downlink transmission target code rate;

and step S230, code block division is carried out on the transmission block again according to the size of the code block, so that all the code blocks in the transmission block are aligned with the unit time slices after the conversion.

Referring to fig. 2 and 3, the "downlink/uplink transition" in step S120 refers to a transition from downlink transmission to uplink transmission in a downlink slot, subframe, or frame indicated in a downlink configuration on TDD. The "unit time slice of downlink/uplink conversion", that is, the unit time slice after conversion, refers to the basic time slice length for maintaining downlink transmission or uplink transmission in a downlink time slot, subframe or frame where downlink/uplink conversion is located. For example, 1 OFDM symbol length, or 2 OFDM symbol lengths, etc.

In a communication system, transport block sizes for different user terminals, different services may be different. After determining the size of the transmission block of the user terminal, the base station may calculate the size of each code block according to the number of Resource Elements (REs) in each downlink/uplink conversion unit time slice and the target code rate of downlink transmission. The code block division can be carried out on the transmission blocks again according to the calculated size of the code blocks, so that all the code blocks in the transmission blocks are aligned according to the downlink/uplink conversion unit time slices under the condition of the width of the scheduled frequency resource, namely, each code block in the transmission block of the user terminal is only in one downlink/uplink conversion unit time slice.

The code block partitioning rules may include at least one of the following:

I. and starting from the code blocks with lower sequence numbers, dividing the code blocks from low sequence numbers to high sequence numbers.

II, the calculation method for the number of the resource elements needed to be occupied by a certain code block comprises the following steps: and dividing the size of the code block by the target code rate of the downlink transmission of the user terminal, and obtaining an integer value by taking the integer.

The rounding operation includes, but is not limited to rounding, rounding up, rounding down, and the like. The calculation can be performed using the following formula (2):

R in the formula (2) represents a downlink transmission target code rate; c (C) _n，k Representing the size of an nth code block in a kth downlink/uplink conversion unit time slice; l (L) _n，k Representing the number of resource elements occupied by an nth code block in a kth downlink/uplink conversion unit time slice; int (·) represents the rounding operation described above.

The "nth code block in the kth downlink/uplink conversion unit time slice" means: in the kth downlink/uplink conversion time slice, the nth code block whose all or part of occupied resource elements are in the kth downlink/uplink conversion time slice from the first occupied resource element.

If the time domain width of the total resources occupied by 2 or more adjacent code blocks exceeds one downlink/uplink conversion unit time slice and the downlink/uplink conversion unit time slices cannot be aligned, the data contained in the adjacent code blocks are divided into a plurality of code blocks with the same size and the length not greater than the maximum code block length specified by the system, and the code blocks generated by the division are aligned with the downlink/uplink conversion unit time slices.

Because the time domain width of the total resource occupied by 2 or more adjacent code blocks exceeds one downlink/uplink conversion unit time slice, after the code blocks generated by the repartitioning are aligned with one downlink/uplink conversion unit time slice, the part of the data quantity exceeding one downlink/uplink conversion unit time slice forms the last code block generated by the partition. The last code block which is generated by the division and does not occupy the downlink/uplink conversion unit time slice can be combined with the subsequent code block and then divided again. The above-described division can be expressed by the following formula:

If L _1，k +L _2，k +…+L _N，k ＞M _k (3)

Then C' _1，k ＝C′ _2，k ＝…C′ _N′-1，k ＝int(M _k ·R/N′) (4)

C′ _N′，k ＝int((M _k -int(C′ _1，k /R)-int(C′ _2，k /R)-…-int(C′ _N′-1，k /R))·R) (5)

Wherein M is _k Indicating the number of resource elements of the kth downlink/uplink conversion unit time slice. Equation (3) indicates that the time domain width of the total resources occupied by the N code blocks exceeds one downlink/uplink conversion unit time slice.

Equation (4) represents that the data contained in N adjacent code blocks is re-divided into N' -1 code blocks of the minimum number that are equal in size and have a length not greater than the maximum code block length specified by the system. Wherein N 'is C' _1，k 、C′ _2，k 、…、C′ _N′，k No more than one conversion unit time slice of code blocks smaller than the maximum code block size defined by the system.

The formula (5) shows that the last code block which does not occupy the downlink/uplink conversion unit time slice generated by division can be combined with the subsequent code block and then divided again.

If the occupied time slice width of a certain code block exceeds one downlink/uplink conversion unit time slice, shortening the code block until the occupied time slice width is equal to one downlink/uplink conversion unit time slice, and merging and dividing the unassigned data with the next code block after shortening. The above-described division can be expressed by the following formula:

If L _1，k ＞M _k (6)

then C' _1，k ＝int(M _k ·R) (7)

The above formula (6) indicates that the code block occupies more than one downlink/uplink conversion unit time slice in time slice width. Equation (7) shows that the code block is truncated to occupy a time slice width equal to one downlink/uplink conversion unit time slice.

V. partitioning should minimize the number of code blocks in each downlink/uplink conversion unit time slice and make the code blocks as uniform as possible.

In the above division manner, all code blocks in the transport block are aligned with the unit time slices after conversion. The alignment effect is that the situation that one code block occupies two or more resource elements in whole or in part is not generated, namely the situation that the code block spans resources is not generated, so that the demodulation time can be reduced, the transmission delay of communication data is further reduced, and the transmission efficiency is improved.

In one embodiment, the method further comprises:

As described above, the downlink transmission in the embodiment of the present application includes the code block whose size can be determined according to the number of time-frequency resources in the unit time-domain time slice of the downlink/uplink conversion and the target code rate. When the base station uses dynamic Downlink Control Information (DCI) to schedule the downlink transmission, the number of resource elements in a unit time slice after the transition used for the corresponding transmission and the size of the code block may be indicated in DCI signaling.

In one embodiment, the appending the downlink transmission block end indication at the end of the downlink transmission block includes:

If the base station detects the reporting information of the burst data transmission requirement on the resources allocated by the base station for reporting the information of the burst data transmission requirement when transmitting the downlink data on a certain downlink/uplink conversion unit time slice, the base station uses a puncturing (puncturing) or rate matching method on the code block on the current downlink/uplink conversion unit time slice to enable part of the time-frequency resources of the specific number and/or specific position in the downlink/uplink conversion unit time slice not to be occupied by the downlink data. And the base station transmits a transmission block ending instruction on the time-frequency resource of the specific number and/or the specific position which is not occupied by the downlink data.

The specific number of time-frequency resources refers to the number of specific number of resource elements, or the number of specific number of physical resource blocks, or the number of specific number of resource elements in a specific time width, or the number of specific number of physical resource blocks in a specific time width.

In the embodiment of the present application, the transmission block end indication may use sequence flags such as Gold sequences or Chu sequences with specific lengths.

In summary, the embodiment of the application utilizes a guard band or a small amount of out-of-band resources outside the effective transmission bandwidth of the system, so that the user terminal with burst service can inform the base station of the service resource requirement at any time. The base station uses variable code blocks adapting to resource distribution on downlink transmission, dynamically converts a part of downlink resources into uplink resources for sending burst service data according to the resource demand report condition of burst service by using downlink/uplink conversion marks, and schedules burst service transmission by using predefined resource allocation information or simplified dynamic scheduling information, thereby achieving the effect of pertinently distributing resources for service according to time-sensitive service demands and reducing or avoiding the influence of the burst service on other users and services in the system.

Fig. 4 is a schematic diagram of an embodiment of a data transmission method according to an embodiment of the present application. The data transmission method can be applied to the user terminal side. As shown in fig. 4, the method may include:

step S310, transmitting burst data transmission requirement reporting information to a base station;

step S320, detecting whether there is a downlink transmission block end indication in the downlink transmission time slice;

Step S330, under the condition that the downlink transmission block end indication exists in the time slice of the downlink transmission, analyzing the uplink scheduling information in the time slice;

step S340, performing burst data uplink transmission on the time-frequency resource indicated by the uplink scheduling information.

In the embodiment of the application, the base station side may allocate resources for transmitting the reporting information of the burst data transmission requirement in advance for the user terminal. The user terminal with burst service data transmission requirement can send the reporting information of the burst service data transmission requirement at any time, and inform the base station of the service resource requirement. In step S310, the user terminal may transmit burst data transmission requirement reporting information to the base station on the allocated resources.

Referring to fig. 1 again, in the downlink transmission time slice, the base station detects the burst data transmission requirement reporting information on the resources allocated by the base station and used for the user terminal to send the burst data transmission requirement reporting information, so as to determine whether the burst data transmission requirement reporting information sent by the user terminal exists on the allocated resources. And under the condition that the base station detects the reporting information of the burst data transmission requirement, adding a downlink transmission block ending instruction at the end of a downlink transmission code block, and inserting uplink scheduling information after the downlink transmission block ending instruction. In step S320 and step S330, the ue detects whether there is a transmission block end indication for each downlink/uplink switching unit time slice in the downlink transmission. When detecting that a transmission block ending indication exists in a certain downlink/uplink conversion unit time slice, the user terminal demodulates uplink scheduling information on a specific time-frequency resource of the downlink/uplink conversion unit time slice, and analyzes uplink scheduling information of a base station pair and the user terminal. In step S340, if there is uplink scheduling information for the ue on the specific time-frequency resource, the ue transmits uplink data on the indicated time-frequency resource according to the uplink scheduling information.

In the embodiment of the application, the user terminal can preferentially send the service with specific delay sensitivity and data flow QoS requirement, or the data of the activated logic channel with the specific identification number or the data of the activated logic channel group with the specific identification number exists.

In the embodiment of the application, the user terminal with the burst-type service data transmission requirement can inform the base station of the service resource requirement, and the base station is utilized to carry out burst-type data uplink transmission according to the time-frequency resource distributed by the resource requirement. The data transmission mode can meet the burst type service data transmission requirement of the user terminal, reduce or avoid the influence of uneven distribution of burst data and data time domain on other users and services in the system, reduce the transmission delay of the communication system and improve the data transmission efficiency.

In one embodiment, the sending the information about reporting the burst data transmission requirement to the base station includes:

In the embodiment of the application, the base station side can divide the resources with specific frequency domain positions and widths in the downlink guard band; or, outside the downlink frequency band, dividing the resources with specific frequency domain positions and widths; and then sending configuration information to the user terminal through semi-static signaling, and configuring the resources with specific frequency domain positions and widths to the specific user terminal for sending the burst data transmission demand reporting information on the resources. The user terminal receives the semi-static signaling from the base station, acquires the configuration information from the semi-static signaling, and utilizes the resources of specific frequency domain positions and widths divided in the configuration information to send the resources of the reporting information of the burst data transmission requirements.

Referring to fig. 3 again, the base station side schedules downlink transmission of the ue, and after determining the size of the ue transmission block, calculates the size of each code block according to the number of resource elements in each downlink/uplink conversion unit time slice and the target downlink transmission code rate contained in the scheduling time slice. And then, carrying out code block division on the transmission blocks according to the calculated size of the code blocks, so that all the code blocks in the transmission blocks are aligned according to downlink/uplink conversion unit time slices under the condition of the width of the scheduled frequency resource. The alignment effect is that the situation that one code block occupies 2 or more resource elements in whole or in part is not generated, namely the situation that the code block spans resources is not generated, so that the demodulation time can be reduced, the transmission delay of communication data is further reduced, and the transmission efficiency is improved. When the base station uses dynamic downlink control information to perform downlink transmission scheduling, the number of resource elements in a unit time slice after conversion and the size of the code block are indicated in signaling of the downlink control information.

Based on this, the user terminal detects whether there is a transmission block end indication in each downlink/uplink conversion unit time slice in the transmission when using a code block whose size can be determined according to the number of time-frequency resources in the unit time-domain time slice for downlink/uplink conversion according to the dynamic downlink control information sent by the base station. When detecting that a transmission block ending indication exists in a certain downlink/uplink conversion unit time slice, the user terminal analyzes uplink scheduling information on a specific time-frequency resource of the downlink/uplink conversion unit time slice, and sends uplink data on the time-frequency resource indicated by the uplink scheduling information.

Regarding the beneficial effects of the data transmission method applied to the user terminal side or the technical problems to be solved, which are provided in the application, reference may be made to the description of the data transmission method applied to the base station side, or reference may be made to the description of the invention, and the description is not repeated here.

As shown in fig. 5, the present application further provides a corresponding embodiment of a data transmission device applied to a base station, and regarding the beneficial effects or the technical problems to be solved of the device, reference may be made to descriptions in methods corresponding to the respective devices, or reference may be made to descriptions in the summary of the invention, which is not repeated herein.

In an embodiment of the data transmission device, the device comprises:

a first detecting unit 100, configured to detect burst data transmission requirement reporting information from a user terminal;

a first indication unit 200, configured to attach a downlink transmission block end indication to a downlink transmission code block end under the condition that the burst data transmission requirement reporting information is detected; the downlink transmission block end indication is used for indicating to convert downlink resources into uplink resources for burst data transmission;

a second indication unit 300, configured to insert uplink scheduling information after the downlink transport block end indication; the uplink scheduling information is used for indicating time-frequency resources occupied by uplink transmission of the burst data after the conversion to the user terminal.

As shown in fig. 6, in an embodiment, the apparatus further comprises a configuration unit 400, where the configuration unit 400 is configured to:

A user terminal having a logical channel with a specific identification number;

In one embodiment, the configuration unit 400 is configured to:

In one embodiment, the first detection unit 100 is configured to:

As shown in fig. 6, in one embodiment, the apparatus further includes a code block dividing unit 500, where the code block dividing unit 500 is configured to:

In one embodiment, the code block dividing unit 500 is further configured to:

In one embodiment, the first indication unit 200 is further configured to:

As shown in fig. 7, the present application further provides a corresponding embodiment of a data transmission device applied to a user terminal, and regarding the beneficial effects or the technical problems to be solved of the device, reference may be made to descriptions in methods corresponding to the respective devices, or reference may be made to descriptions in the summary of the invention, which is not repeated herein.

In an embodiment of the data transmission device, the device comprises:

a sending unit 600, configured to send burst data transmission requirement reporting information to a base station;

a second detecting unit 700, configured to detect whether there is an end indication of a downlink transmission block in a downlink transmission time slice;

a parsing unit 800, configured to parse uplink scheduling information in the time slice when it is detected that there is a downlink transport block end indication in the time slice of the downlink transport;

and a transmission unit 900, configured to perform uplink transmission of burst data on the time-frequency resource indicated by the uplink scheduling information.

In one embodiment, the sending unit 600 is configured to:

Fig. 8 is a schematic diagram of a computing device 900 provided by an embodiment of the present application. The computing device 900 includes: processor 910, memory 920, and communication interface 930.

It should be appreciated that the communication interface 930 in the computing device 900 shown in fig. 8 may be used to communicate with other devices.

Wherein the processor 910 may be coupled to a memory 920. The memory 920 may be used to store the program codes and data. Accordingly, the memory 920 may be a storage unit internal to the processor 910, an external storage unit independent of the processor 910, or a component including a storage unit internal to the processor 910 and an external storage unit independent of the processor 910.

Optionally, computing device 900 may also include a bus. The memory 920 and the communication interface 930 may be connected to the processor 910 through a bus. The bus may be a peripheral component interconnect standard (Peripheral Component Interconnect, PCI) bus or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, or the like. The buses may be classified as address buses, data buses, control buses, etc.

It should be appreciated that in embodiments of the present application, the processor 910 may employ a central processing unit (central processing unit, CPU). The processor may also be other general purpose processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (Application specific integrated circuit, ASIC), off-the-shelf programmable gate arrays (field programmable gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. Or the processor 910 may employ one or more integrated circuits for executing associated programs to perform the techniques provided in the embodiments of the present application.

The memory 920 may include read only memory and random access memory and provide instructions and data to the processor 910. A portion of the processor 910 may also include nonvolatile random access memory. For example, the processor 910 may also store information of the device type.

When the computing device 900 is running, the processor 910 executes computer-executable instructions in the memory 920 to perform the operational steps of the methods described above.

It should be understood that the computing device 900 according to the embodiments of the present application may correspond to a respective subject performing the methods according to the embodiments of the present application, and that the foregoing and other operations and/or functions of the respective modules in the computing device 900 are respectively for implementing the respective flows of the methods of the embodiments, and are not described herein for brevity.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The embodiments of the present application also provide a computer-readable storage medium having stored thereon a computer program for executing a diversified problem generating method when executed by a processor, the method comprising at least one of the aspects described in the respective embodiments above.

Any combination of one or more computer readable media may be employed as the computer storage media of the embodiments herein. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Computer program code for carrying out operations of the present application may be written in one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).

Note that the above is only the preferred embodiments of the present application and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the present application has been described in connection with the above embodiments, the present invention is not limited to the above embodiments, but may include many other equivalent embodiments without departing from the spirit of the present invention, and the present invention is also within the scope of protection.

Claims

1. A method for low latency data transmission, comprising:

inserting uplink scheduling information after the downlink transmission block end indication; the uplink scheduling information is used for indicating time-frequency resources of downlink time slices occupied by uplink transmission of burst data after the conversion to the user terminal;

Before the end indication of the downlink transmission block is added to the end of the code block of the downlink transmission, the method further comprises the following steps:

determining the size of a transmission block of the user terminal;

carrying out code block division on the transmission block again according to the size of the code block, so that all the code blocks in the transmission block are aligned with the unit time slices after conversion;

wherein the re-dividing the code block according to the size of the code block includes:

starting from the code block with the lower sequence number, dividing the code blocks in sequence from the lower sequence number to the higher sequence number;

the method for calculating the number of the resource elements required to be occupied by a certain code block comprises the following steps: dividing the size of the code block by the target code rate of the downlink transmission of the user terminal, and obtaining an integer value by taking the integer;

if the time domain width of the total resources occupied by 2 or more adjacent code blocks exceeds one downlink/uplink conversion unit time slice and the downlink/uplink conversion unit time slices cannot be aligned, the data contained in the adjacent code blocks are divided into a plurality of code blocks with the same size and the length not greater than the maximum code block length specified by the system, the code blocks generated by the repartitioning are aligned with the downlink/uplink conversion unit time slices, after the code blocks generated by the repartitioning are aligned with one downlink/uplink conversion unit time slice, the part of the data volume exceeding one downlink/uplink conversion unit time slice forms the last code block generated by the dividing, and the last code block generated by the dividing does not occupy the code blocks in the downlink/uplink conversion unit time slice and can be combined with the subsequent code blocks and then divided again;

If the occupied time slice width of a certain code block exceeds one downlink/uplink conversion unit time slice, the code block is truncated until the occupied time slice width is equal to one downlink/uplink conversion unit time slice, and the data which are not distributed after being truncated are combined and divided with the next code block.

2. The method according to claim 1, wherein the method further comprises:

a user terminal having a logical channel with a specific identification number;

3. The method of claim 2, wherein the particular latency comprises a data latency below a first set threshold; the particular data traffic demand includes a maximum data burst size below a second set threshold.

4. The method according to claim 2, wherein configuring the resources for transmitting the burst data transmission requirement reporting information for the specific user terminal comprises:

5. The method according to any of claims 1 to 4, wherein said detecting a burst data transmission requirement reporting information from a user terminal comprises:

6. The method according to claim 1, wherein the method further comprises:

7. The method according to any one of claims 1 to 4, wherein appending the downlink end of block indication at the end of the downlink code block comprises:

8. A method for low latency data transmission, comprising:

carrying out burst data uplink transmission on the time-frequency resource of the downlink time slice indicated by the uplink scheduling information;

The size of the code block in the transmission block used for uplink transmission of the burst data is obtained in the following manner:

receiving downlink control information sent by a base station, wherein the signaling of the downlink control information indicates the number of resource elements in a unit time slice after conversion and the size of a code block; wherein the code block is obtained by dividing code blocks which are carried out by the base station on the transmission blocks of the terminal again, and the dividing performed by the base station comprises:

9. The method of claim 8, wherein the sending the burst data transmission requirement reporting information to the base station comprises:

10. A low latency data transmission device, comprising:

A second indication unit, configured to insert uplink scheduling information after the downlink transport block end indication; the uplink scheduling information is used for indicating time-frequency resources of downlink time slices occupied by uplink transmission of burst data after the conversion to the user terminal;

the first indication unit is configured to, before the end indication of the downlink transmission block is added to the end of the downlink transmission block, further:

determining the size of a transmission block of the user terminal;

11. A low latency data transmission device, comprising:

a transmission unit, configured to perform burst data uplink transmission on a time-frequency resource of a downlink time slice indicated by the uplink scheduling information, where a code block size in a transmission block used for performing burst data uplink transmission is obtained in the following manner: