WO2016192032A1

WO2016192032A1 - Data transmission method, system and terminal

Info

Publication number: WO2016192032A1
Application number: PCT/CN2015/080548
Authority: WO
Inventors: 吴作敏; 李强; 刘德平
Original assignee: 华为技术有限公司
Priority date: 2015-06-02
Filing date: 2015-06-02
Publication date: 2016-12-08
Also published as: CN106797280A; CN106797280B

Abstract

A data transmission method includes: receiving a data signal on a first carrier by a reception terminal, the data signal including a demodulation reference signal and at least two data blocks, and the transmission time length of the last data block of the at least two data blocks being smaller than or equaling to the transmission time length of the other data block/blocks; demodulating and decoding the at least two data blocks by the reception terminal according to the demodulation reference signal; transmitting a short control signal on the first carrier by the reception terminal once a first preset time arrives, the short control signal including the reply information of the at least two data blocks. The present invention is used for improving the speed of data demodulation and decoding and implementing coexistence of communication devices.

Description

Data transmission method, system and terminal

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a data transmission method, system, and terminal.

Background technique

With the development of wireless communication technology, wireless communication systems will develop in the direction of network convergence, with the aim of comprehensively utilizing multiple wireless access technologies and multiple wireless communication methods to improve spectrum utilization and network capacity. Among them, the new communication technology introduced in the Long Term Evolution (LTE) network architecture proposed by the 3rd Generation Partnership Project (3GPP), D2D communication is one of the hot spots, which allows cellular networks. The two terminals that are closer together communicate directly with each other through a specific channel.

D2D communication mainly includes the discovery between D2D devices when there is network coverage in the public security scenario, and the broadcast communication between D2D devices in the case of network coverage and no network coverage. The process is the same as the cell terminal. Licensed spectrum resources.

The spectrum resources are divided into licensed spectrum resources and unlicensed spectrum resources, which are managed and controlled by the state. Different wireless communication systems are licensed with different frequency bands to avoid inter-system interference. The current D2D communication occupies a portion of the licensed uplink spectrum resources. However, licensed spectrum resources are relatively valuable compared to unlicensed spectrum resources. Therefore, the purpose of offloading D2D communication services to unlicensed spectrum resources to achieve network capacity diversion will become the development direction of wireless communication technologies.

Summary of the invention

Embodiments of the present invention provide a data transmission method, system, and user terminal, which are used to improve data demodulation and decoding speed and realize coexistence between communication devices.

A first aspect of the present invention provides a data transmission method, which may include:

The receiving terminal receives the data signal on the first carrier, where the data signal includes a demodulation reference signal and at least two data blocks, and a transmission time length of the last data block of the at least two data blocks is not greater than other data blocks. Length of transmission time;

The receiving terminal demodulates the at least two data blocks according to the demodulation reference signal Code processing

After receiving the first preset time, the receiving terminal sends a short control signal on the first carrier, where the short control signal includes response information of the at least two data blocks, where the first preset time is The interval between the end time of receiving the data signal and the start time of transmitting the short control signal by the receiving terminal.

With reference to the first aspect, in a first possible implementation, the transmission time length of each of the at least two data blocks is the same; or, in addition to the last data block, the at least two data blocks The other data blocks have the same transmission time length.

With reference to the first aspect, or the first possibility of the first aspect, in a second possible implementation manner, the first preset time is not less than a conversion time of the receiving terminal from a receiving state to a sending state.

A second aspect of the present invention provides a data transmission method, which may include:

The transmitting terminal acquires data to be transmitted, and divides the to-be-sent data into at least two data blocks, and the transmission time length of the last one of the at least two data blocks is not greater than the transmission time length of the other data blocks;

Transmitting, by the transmitting terminal, a data signal to the receiving terminal on the first carrier, where the data signal includes a demodulation reference signal and the at least two data blocks;

After the second preset time, the sending terminal receives a short control signal, where the short control signal includes response information of the at least two data blocks, and the second preset time is that the sending terminal sends the data The interval between the end of the signal and the start of the receipt of the short control signal.

With reference to the second aspect, in a first possible implementation, the transmission time length of each of the at least two data blocks is the same; or, in addition to the last data block, the at least two data blocks The other data blocks have the same transmission time length.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in a second possible implementation manner, the second preset time is not less than the first preset time, the first preset time And an interval time from the end time of receiving the data signal to the start time of transmitting the short control signal.

A third aspect of the present invention provides a terminal, which may include:

a receiving module, configured to receive a data signal on the first carrier, where the data signal includes a demodulation reference signal and at least two data blocks, and transmission of a last one of the at least two data blocks The length of time is not greater than the length of transmission time of other data blocks;

a processing module, configured to perform demodulation and decoding processing on the at least two data blocks according to the demodulation reference signal;

a sending module, configured to send, by using a first preset time, a short control signal on the first carrier, where the short control signal includes response information of the at least two data blocks, where the first preset time is The interval between the end time of receiving the data signal and the start time of transmitting the short control signal is received by the receiving terminal.

A fourth aspect of the present invention provides a terminal, which may include:

a processing module, configured to acquire data to be sent, and divide the to-be-sent data into at least two data blocks, where a transmission time length of a last one of the at least two data blocks is not greater than a transmission time length of the other data blocks;

a sending module, configured to send, by using a first carrier, a data signal to the receiving terminal, where the data signal includes a demodulation reference signal and the at least two data blocks;

a receiving module, configured to receive, by using a second preset time, a short control signal, where the short control signal includes response information of the at least two data blocks, where the second preset time is sent by the sending terminal The interval between the end time of the data signal and the start time of receiving the short control signal.

A fifth aspect of the present invention provides a data transmission system, which may include: a transmitting terminal and a receiving terminal; wherein the transmitting terminal is the terminal provided by the foregoing fourth aspect, and the receiving terminal is the terminal provided by the foregoing third aspect.

It can be seen that, in the embodiment of the present invention, the receiving terminal receives the data signal on the first carrier, where the data signal includes the mediation reference signal and the at least two data blocks, and the transmission time length of the last data block of the at least two data blocks Not longer than the transmission time length of other data blocks, and then the receiving terminal performs demodulation and decoding processing on at least two data blocks according to the demodulation reference signal in the data signal, and when the first preset time passes, the receiving terminal passes the first A carrier transmits a short control signal, and the short control signal carries a response message to the data block. In the embodiment of the present invention, the demodulation and decoding are performed in units of data blocks, and the received data block can be demodulated and decoded by using the transmission time of the subsequent data block, thereby achieving the purpose of reducing the demodulation and decoding time. The short control signal is used to transmit the response information of the data block, and the detection of the carrier corresponding channel is not required, the collision is reduced, and the coexistence between the communication devices is realized.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description of the embodiments will be briefly described. It is obvious that the drawings in the following description are only some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

1 is a schematic flowchart of a data transmission method according to an embodiment of the present invention;

2 is a schematic flowchart of a data transmission method according to another embodiment of the present invention;

FIG. 3 is a schematic diagram of a transmission process of a data transmission method according to an embodiment of the present invention; FIG.

FIG. 3b is a schematic diagram of a transmission process of a data transmission method according to another embodiment of the present invention; FIG.

FIG. 3 is a schematic diagram of a transmission process of a data transmission method according to another embodiment of the present invention; FIG.

4 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a terminal according to another embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a data transmission system according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention.

detailed description

Embodiments of the present invention provide a data transmission method for improving data demodulation and decoding speed and realizing coexistence between communication devices. The present invention also provides a data transmission system and terminal accordingly.

In order to make the object, the features and the advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention. It is only a part of the embodiments of the invention, not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The terms "first", "second", "third", "fourth" and the like in the specification and claims of the present invention and the above drawings are used to distinguish different objects, and are not intended to describe a specific order. Furthermore, the terms "comprises" and "comprising" and "comprising" are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device that comprises a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units not listed, or alternatively Other steps or units inherent to these processes, methods, products or equipment.

Let's briefly introduce the unlicensed spectrum and the current coexistence specifications for unlicensed spectrum.

Resource sharing on the unlicensed spectrum means that the use of a particular spectrum only specifies limits on the transmit power, out-of-band leakage, etc., to ensure that the basic coexistence requirements are met between multiple wireless communication devices that use the spectrum together, without Limit radio technology, operating companies and years of use, but do not guarantee the quality of the services on them. Operators can use the unlicensed spectrum resources to achieve the purpose of network capacity offloading, but need to comply with the regulatory requirements of license-free spectrum resources in different geographies and different spectrums. These requirements are usually designed to protect public systems such as radar, as well as to ensure that multiple systems do not cause harmful effects and fair coexistence with each other, including emission power limits, out-of-band leak indicators, indoor and outdoor use restrictions, and areas. There are also some additional coexistence strategies and so on.

The unlicensed spectrum considered for D2D communication is a 5 GHz unlicensed band opened by governments. The coexistence specifications include Transmit Power Control (TPC), Dynamic Frequency Selection (DFS), and channel occupied bandwidth. And listen to the first listen (Listen before talk, referred to as LBT) and so on. For example, since 5.25 to 5.35 GHz and 5.47 to 5.725 GHz are the operating frequency bands of the global radar system, in order to avoid interference of the radar system by the wireless communication device operating in the 5 GHz band, the wireless communication device must have the functions of TPC and DFS. Among them, TPC is to prevent wireless communication equipment from transmitting excessive power interference to the radar system. DFS is to enable the wireless communication equipment to actively detect the frequency used by the radar system and actively select another frequency to avoid the frequency used by the radar system. The channel occupied bandwidth requirement is that when the wireless communication device operates in the 5G frequency band, the occupied channel bandwidth should reach 80% to 100% of its claimed channel bandwidth. LBT is a coexistence strategy between systems. The wireless communication system needs to use the LBT rule when occupying the unlicensed spectrum communication. That is, the wireless communication device first monitors whether the channel is idle before using the channel, and can use the unlicensed spectrum if the channel is idle. Channel, but the time occupied by the channel is limited. After the time when the channel is occupied reaches the maximum limit, the unlicensed spectrum must be released for a period of time. The channel must be monitored again before the next time the channel on the unlicensed spectrum is occupied. Whether it is free.

According to the current regulations of European regulations, when wireless communication equipment is used on the unlicensed spectrum, it needs to meet the requirements of the frame-based equipment (FBE), or the load-based equipment (Load based equipment, Referred to as LBE), the mechanism is called after listening. However, one exception is short control signal transmission, where short control signal transmission refers to wireless communication. The device does not detect whether the channel is occupied by other devices, and directly transmits management and control frames (such as ACK/NACK signals). If short control signal transmission is performed, the device sends a short control signal with a maximum duty cycle of 5% within 50 ms of observation time.

What is to be achieved by the embodiments of the present invention is how to complete D2D communication by using the unlicensed spectrum in the LTE system.

The D2D communication of the LTE system follows the subframe structure of the LTE system. Specifically, the minimum time unit of the D2D communication transmission may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol in the LTE system. In the LTE system, the length of one subframe is 1 ms. A subframe of a Normal Cyclic Prefix (NCP) subframe format includes 14 OFDM symbols, which are numbered from 0 to 13, wherein the labels 0 to 6 are the first slots, and the labels 7 to 13 are the second. Time slot. A subframe of the Extended Cyclic Prefix (ECP) subframe format includes 12 OFDM symbols, which are numbered from 0 to 11, wherein the labels 0 to 5 are the first time slots, and the numbers 6 to 11 are the second. Time slot.

Based on the above description, the embodiment of the present invention provides a data transmission method, which improves transmission rate, reduces demodulation and decoding time, and implements coexistence between communication devices. The method may include: receiving a data signal on a first carrier by a receiving terminal, The data signal includes a demodulation reference signal and at least two data blocks, and a transmission time length of a last one of the at least two data blocks is not greater than a transmission time length of the other data blocks; Demodulating a reference signal, performing demodulation decoding processing on the at least two data blocks; when reaching a first preset time, the receiving terminal transmits a short control signal on the first carrier, the short control signal The response information of the at least two data blocks is included.

Referring to FIG. 1 , FIG. 1 is a schematic flowchart of a data transmission method according to an embodiment of the present invention; as shown in FIG. 1 , a data transmission method may include:

The receiving terminal receives the data signal on the first carrier, where the data signal includes a Demodulation Reference Signal (DMRS) and at least two data blocks, and the last data of the at least two data blocks. The transmission time length of the block is not greater than the transmission time length of other data blocks;

It should be understood that the demodulation reference signal is a reference signal for demodulation decoding of the at least two data blocks.

In the process of performing step 101, optionally, the first carrier may be an unlicensed spectrum. The carrier on the carrier can also be the carrier on the licensed spectrum.

In a specific implementation of step 101, the receiving terminal receives a data signal comprising at least two data blocks on the first carrier. It can be understood that a data block, also called a transport block (TB), is a separate codeword with independent TB Cyclic Redundancy Check (TB-CRC) and modulation. The Modulation and Coding Scheme (MCS) can receive and decode each data block.

In one embodiment, each of the at least two data blocks has a transmission time length equal to each other. Optionally, in this case, the last data block may adopt a low-order MCS to reduce the demodulation and decoding processing time of the last data block by the receiving terminal, and it needs to be explained that, in general, the MCS is small. The demodulation and decoding time required for the data block is also short. Optionally, in this case, the transmission time length of the last data block is sufficient for the demodulation decoding process and/or feedback information preparation of the receiving terminal for the penultimate data block, thereby reducing the receiving terminal from receiving to sending. Processing delay.

In one embodiment, the data blocks of the at least two data blocks except the last data block have the same transmission time length, and the transmission time length of the last data block is smaller than other data blocks. It should be understood that, in general, the demodulation and decoding time required for a data block having a shorter transmission time is correspondingly shortened. In this case, the last data block adopts the shortest transmission time, and the demodulation and decoding processing time of the last data block by the receiving terminal can be reduced. Optionally, in this case, the transmission time length of the last data block is sufficient for the demodulation decoding process and/or feedback information preparation of the receiving terminal for the penultimate data block, thereby reducing the receiving terminal from receiving to sending. Processing delay.

In another embodiment, the transmission time length of each of the at least two data blocks is not equal, but the transmission time length of the last data block is the shortest. Optionally, starting from the first data block of the at least two data blocks, the transmission time length of the data block is decremented, that is, the transmission time length of the first data block is the longest, and the transmission time length of the second data block is long. Second, and so on, the last block of data has the shortest transmission time. It should be understood that, in general, the smaller the transmission time length, the shorter the demodulation decoding time required for the data block. In this case, the last data block uses the shortest transmission time, which can reduce the demodulation and decoding processing time of the last data block by the receiving terminal. Optionally, in this case, the transmission time length of the last data block is sufficient for the demodulation decoding process and/or feedback information preparation of the receiving terminal for the penultimate data block, thereby reducing the receiving terminal from receiving to sending. Processing delay.

Optionally, in the process of the step 101, the time unit of the transmission time length of any one of the at least two data blocks may be an OFDM symbol, or may be a subframe.

Optionally, the data signal further includes at least one of the following information: a reference signal for synchronization, and a reference signal received power (RSRP). Measured reference signal, reference signal for channel state information (CSI) measurement, reference signal for interference measurement, reference signal for position measurement, resource allocation corresponding to the at least two data blocks Information and MCS information corresponding to the at least two data blocks.

102. The receiving terminal performs demodulation and decoding processing on the at least two data blocks according to the demodulation reference signal.

It will be appreciated that the demodulation decoding process of the present invention includes demodulating, decoding, and preparing response information for the data block based on the results of the demodulation decoding.

In the process of the specific implementation step 102, since the receiving terminal receives at least two data blocks, the receiving terminal may perform demodulation and decoding processing in units of data blocks, that is, after receiving the first data block, the receiving terminal The first data block can be demodulated and decoded according to the demodulation reference signal, that is, when the terminal receives the next data block, the previous data block or even the previous data block can be demodulated and decoded, and received. In the last data block, it is possible that the third data block and the previous data block have been demodulated and decoded, so that when the last data block is received, the second to last data block is demodulated and decoded. Compared with the prior art, the demodulation and decoding time in the embodiment of the present invention is equivalent to the demodulation and decoding time of the last data block, so as to fully utilize the data transmission time, thereby reducing the processing time of demodulation and decoding.

In the process of the specific implementation step 102, optionally, when the data signal further includes resource allocation information corresponding to the at least two data blocks, the receiving terminal is configured according to resources corresponding to the at least two data blocks. The allocation information determines a time domain location and/or a frequency domain location and/or a spatial domain location of the at least two data blocks, and further performs demodulation decoding processing on the at least two data blocks. Optionally, when the data signal further includes the MCS information corresponding to the at least two data blocks, the receiving terminal determines, according to the MCS information corresponding to the at least two data blocks, the at least two data blocks. The MCS further performs demodulation decoding processing on the at least two data blocks.

After the demodulation and decoding, the response information of the data block is prepared. In the embodiment of the present invention, The response information needs to be encoded, modulated, mapped, and the like before being sent. Therefore, in the embodiment of the present invention, the response information carried in the short control signal is already encoded and modulated at the transmitting terminal before being sent to the transmitting terminal. , mapping, etc.

In the process of the specific implementation step 102, optionally, when the data signal further includes a reference signal for synchronization, the receiving terminal determines the timing of the receiving terminal and the transmitting terminal according to the reference signal for synchronization. Information and / or frequency offset information. Optionally, when the data signal further includes a reference signal for RSRP measurement, the receiving terminal determines the RSRP measurement result and/or the reference signal receiving quality according to the reference signal used for the RSRP measurement (Reference Signal Received) Quality, referred to as RSRQ) measurement results and/or Received Signal Strength Indicator (RSSI) measurement results. Optionally, when the data signal further includes a reference signal for CSI, the receiving terminal determines, according to the reference signal for CSI, a CSI feedback message of the terminal, specifically, the CSI feedback message. The channel quality indicator (CQI) information, and/or the Precoding Matrix Indicator (PMI) information, and/or the Rank Indication (RI) information may be included. Optionally, when the data signal further includes a reference signal for interference measurement, the receiving terminal determines the interference measurement result of the receiving terminal according to the reference signal used for the interference measurement. Optionally, when the data signal further includes a reference signal for location measurement, the receiving terminal determines location information of the receiving terminal according to the reference signal used for location measurement. It should be understood that reference signals having a plurality of different functions may be the same reference signal. For example, the cell-specific reference signal (CRS) in the LTE system can be used for determining the time-frequency synchronization information of the terminal, and can also be used for determining the RSRP, RSRQ, or RSSI measurement result by the terminal, and can also be used for Demodulation decoding of data blocks.

When the foregoing data signal further includes the foregoing optional information, the timing information, the frequency offset information, the RSRP measurement result, the RSRQ measurement result, the RSSI measurement result, the interference measurement result, or the receiving terminal are obtained according to the demodulation and decoding optional information. The location information and the like, at least one of the information is transmitted as control information and response information of the data block to the transmitting terminal. Of course, the control information is also subjected to encoding, modulation, mapping, and the like before transmission.

After receiving the first preset time, the receiving terminal sends a short control signal on the first carrier, where the short control signal includes response information of the at least two data blocks, the first preset time And an interval time from the end time of receiving the data signal to the start time of transmitting the short control signal.

In the embodiment of the present invention, when the receiving terminal sends the response information of the data block by using the short control signal on the first carrier, it may not be necessary to detect whether the channel of the first carrier is idle.

In a specific implementation step 103, the first preset time is not less than the first time, in consideration of the first time required for the receiving terminal to switch from the receiving state to the transmitting state.

For example, if the first time is 20us, that is, after the receiving terminal receives the data signal, it takes 20us to switch from the receiving state to the transmitting state, and the first preset time can be set to 30us, at the end of the 30us, that is, receiving The terminal ends the 30th end of the data signal reception, and the receiving terminal needs to send the response information to the transmitting terminal, so that the transmitting terminal can correctly receive and demodulate the response information of the decoded data block, and in the first time, the first carrier The large duty cycle reduces collisions between communication devices.

Optionally, the receiving terminal needs to consume the second time for the demodulation and decoding process of the received last data block, where the first preset time is not less than the second time interval. In this case, after receiving the data block, the receiving terminal starts demodulating and decoding the data block, and the transmission time of the last data block can be used for demodulation decoding of the second to last data block. After the receiving terminal receives the last data block, it only needs to demodulate and decode the last data block to send a response message to the transmitting terminal. In this case, the first preset time is not less than the solution of the last data block. The second time that the decoding process needs to be consumed.

Optionally, the short control signal further includes control information, where the control information may include timing information, frequency offset information, RSRP measurement result, RSRQ measurement result, RSSI measurement result, and CSI measurement result. At least one of interference measurement result and terminal location information.

Therefore, in the process of the specific implementation step 103, the receiving terminal sending the short control signal on the first carrier includes: the receiving terminal transmitting by frequency division multiplexing or code division multiplexing on the first carrier And the control information and the response information of the at least two data blocks; or the terminal transmitting the control information and the response information of the at least two data blocks by using time division multiplexing on the first carrier. Wherein, the control information may be sent first, and then the response information of the data block is sent, thereby obtaining more time for demodulating and decoding the last data block and the information to be sent; or if the first preset time is sufficient for demodulation The information decoded and prepared for transmission, the control information and the response information of the data block are sent together give away.

It can be seen that, in the embodiment of the present invention, the receiving terminal receives the data signal on the first carrier, where the data signal includes the mediation reference signal and the at least two data blocks, and the transmission time length of the last data block of the at least two data blocks Not longer than the transmission time length of the other data blocks, and then the receiving terminal performs demodulation and decoding processing on the at least two data blocks according to the demodulation reference signal in the data signal, and the receiving terminal passes the first carrier after the first preset time A short control signal is sent, and the response information to the data block is carried in the short control signal. In the embodiment of the present invention, demodulation and decoding may be performed in units of data blocks, thereby fully utilizing the transmission time of other data blocks to demodulate and decode the received data blocks, thereby reducing demodulation and decoding processing time. The purpose is to transmit the response information to the data block by using the short control signal, so that the carrier corresponding channel is not detected, the collision is reduced, and the coexistence between the terminal and other devices is realized.

In the above embodiment, the specific scheme of the data transmission method is described in detail from the receiving terminal side, and the following will be further triggered from the transmitting terminal side. Referring to FIG. 2, FIG. 2 is a schematic flowchart of a data transmission method according to some embodiments of the present invention; as shown in FIG. 2, a data transmission method may include:

201. The sending terminal acquires data to be sent, and divides the to-be-sent data into at least two data blocks.

Each of the at least two data blocks has the same transmission time length, and the last data block may adopt a lower-order MCS; or, other data of the at least two data blocks except the last data block The transmission time lengths of the blocks are equal, and the transmission time length of the last data block is smaller than other data blocks; or, the transmission time length of each data block in the at least two data blocks is not equal, but the transmission time length of the last data block is the shortest. . For details, refer to the detailed description of the data block in the embodiment shown in FIG. 1 , and details are not described herein again.

Optionally, the time unit of the transmission time length of any one of the at least two data blocks may be an OFDM symbol, or may be a subframe.

Optionally, the data signal further includes at least one of the following information: a reference signal used for synchronization, a reference signal used for RSRP measurement, a reference signal used for CSI measurement, a reference signal used for interference measurement, a reference signal for location measurement, resource allocation information corresponding to the at least two data blocks, and MCS information corresponding to the at least two data blocks.

202. The sending terminal sends a data signal to the receiving terminal on the first carrier, where the data signal The demodulation reference signal and the at least two data blocks are included;

It should be noted that the first carrier in the embodiment of the present invention may be a carrier on the unlicensed spectrum, or may be a carrier on the licensed spectrum. The first carrier in the embodiment of the present invention is the same carrier as the first carrier introduced in the foregoing embodiment.

Optionally, before receiving the data signal, the receiving terminal may monitor whether the first carrier is idle or not based on the first listening mechanism or the licensed spectrum, and when determining that the first carrier is idle, A data signal is transmitted on a carrier.

203. After the second preset time, the sending terminal receives a short control signal, where the short control signal includes response information of the at least two data blocks, where the second preset time is the sending terminal from the sending station. The interval between the end time of the data signal and the start time of receiving the short control signal.

The second preset time is not less than the first preset time, and the first preset time is the start time of the receiving terminal from receiving the data signal to the start time of sending the short control signal. Intervals.

In some embodiments of the present invention, the second preset time in the embodiment of the present invention may be the first preset time of the foregoing embodiment. For example, if the first preset time is set to 30 us, the second preset time may also be set to 30 us, that is, the transmitting terminal starts receiving the short control signal sent by the terminal from the end time of the 30th end of the transmitted data signal. . Optionally, before the receiving terminal sends the short control signal, determining, according to the synchronization reference signal of the receiving terminal and the transmitting terminal, a timing advance of the sending, so that the sending terminal can correctly receive the short control signal at the second preset time. .

In other embodiments of the present invention, the second preset time in the embodiment of the present invention may be slightly larger than the first preset time in the foregoing embodiment, because the signal needs a certain time in the transmission process. For example, if the first preset time is set to 30 us, and the minimum delay of the one-way transmission of the signal is 1 us, the second preset time can be set to 32 us, that is, the end time of the 32us from which the transmitting terminal transmits the data signal. Start receiving the short control signal sent by the receiving terminal.

It can be seen that, in the embodiment of the present invention, the transmitting terminal divides the data to be transmitted into at least two data blocks, and the transmission time length of the last data block is not greater than the transmission time length of the other data blocks, so that the receiving terminal can The data block is demodulated and decoded in units, the demodulation processing time is improved, and the receiving terminal can be converted from the received data signal to the short control signal as soon as possible, and the feedback to the transmitting terminal is completed as soon as possible, and the terminal and other communication devices are reduced. Collision. At the same time, the transmitting terminal is in the second Receiving the response information within the preset time, the response information of the transmitted data block can be correctly demodulated and decoded, and the entire data transmission is completed.

Optionally, the data signal further includes at least one of the following information: a reference signal for synchronization, a reference signal for RSRP measurement, a reference signal for CSI measurement, and a reference signal for interference measurement. And a reference signal for location measurement, resource allocation information corresponding to the at least two data blocks, and MCS information corresponding to the at least two data blocks. It should be understood that reference signals having a plurality of different functions may be the same reference signal. For example, the cell common reference signal CRS in the LTE system can be used for determining the time-frequency synchronization information by the terminal, or for determining the RSRP, RSRQ or RSSI measurement result by the terminal.

In an embodiment, when the data signal includes at least one of the resource allocation information and the MCS information, in addition to the at least two data blocks and the demodulation reference signal, optionally, other reference signals may also be included. The process of the data transmission method of the embodiment of the present invention may specifically include the case shown in FIG. 3a to FIG. 3d (the SA in FIG. 3a to 3d includes at least one of resource allocation information and MCS information, and RS represents at least one reference signal. It should be understood that Figures 3a to 3d are considered from the perspective of the receiving terminal.):

As shown in FIG. 3a, the transmitting terminal places the SA between the RSs, transmits the SA and the RS, and then sends the data block; when the first preset time is reached, the receiving terminal feeds back the response information and the control information of the data block, where In Figure 3a, the response information is sent along with the control information.

As shown in FIG. 3b, the transmitting terminal transmits the SA and the RS together; when the first preset time is reached, the receiving terminal first feeds back control information, and feedbacks one by one, and demodulates and decodes the last data block for the receiving terminal. Strive for more time;

As shown in FIG. 3c, the transmitting terminal first sends an RS, and the SA sends before the data block; when the first preset time arrives, the control information is sent together with the response information;

As shown in FIG. 3d, the transmitting terminal first sends the RS, then sends the SA, and then sends the data block. When the first preset time arrives, the receiving terminal first feeds back the control information, and then sends the response information.

Alternatively, the short control signal can occupy one or more symbols.

Referring to FIG. 4, FIG. 4 is a schematic structural diagram of a terminal 400 according to an embodiment of the present invention. As shown in FIG. 4, the terminal 400 corresponding to the data transmission method shown in FIG. 1 may include:

The receiving module 410 is configured to receive a data signal on the first carrier, where the data signal includes a demodulation reference signal and at least two data blocks, and a last one of the at least two data blocks The transmission time length is not greater than the transmission time length of other data blocks;

The processing module 420 is configured to perform demodulation and decoding processing on the at least two data blocks according to the demodulation reference signal;

The sending module 430 is configured to send, by using the first preset time, a short control signal on the first carrier, where the short control signal includes response information of the at least two data blocks, where the first preset time is The interval time from the end time of receiving the data signal to the start time of transmitting the short control signal.

It can be seen that the receiving module 410 receives a data signal on the first carrier, where the data signal includes a mediation reference signal and at least two data blocks, and a transmission time length of the last one of the at least two data blocks is not greater than other The transmission time length of the data block, after which the processing module 420 performs demodulation and decoding processing on the at least two data blocks according to the demodulation reference signal in the data signal, and after the first preset time, the sending module 430 sends the first carrier. The short control signal carries the response information to the data block in the short control signal. In the embodiment of the present invention, the demodulation and decoding are performed in units of data blocks, and the received data block can be demodulated and decoded by using the transmission time of the subsequent data block, thereby achieving the purpose of reducing the demodulation and decoding time. The short control signal is used to transmit the response information of the data block, and the detection of the carrier corresponding channel is not required, the collision is reduced, and the coexistence between the communication devices is realized.

In some possible embodiments of the present invention, each of the at least two data blocks has the same transmission time length; or, among the at least two data blocks, other than the last data block. The transmission time is the same length.

Preferably, the first preset time is not less than a transition time of the terminal from a receiving state to a sending state.

Optionally, the above demodulation reference signal comprises at least one of the following: a reference signal for synchronization, a reference signal for RSRP measurement, a reference signal for CSI, a reference signal for interference measurement, a reference signal of the location measurement, resource allocation information corresponding to the at least two data blocks, and MCS information corresponding to the at least two data blocks.

Optionally, the short control signal further includes control information, where the control information includes at least one of the following information: timing information, frequency offset information, RSRP measurement result, reference signal received quality RSRQ measurement result, and received signal strength indicator RSSI. Measurement results, CSI measurement results, interference measurement results, and terminal position information.

In some implementations of the present invention, the sending module 430 is specifically configured to send, by using frequency division multiplexing or code division multiplexing, the control information and the response of the at least two data blocks on the first carrier. And transmitting the control information and the response information of the at least two data blocks by time division multiplexing on the first carrier.

Referring to FIG. 5, FIG. 5 is a schematic structural diagram of a terminal 500 according to an embodiment of the present invention; as shown in FIG. 5, the terminal 500 corresponding to the transmission method shown in FIG. 2 may include:

The processing module 510 is configured to obtain data to be sent, and divide the to-be-transmitted data into at least two data blocks, where a transmission time length of a last one of the at least two data blocks is not greater than a transmission time length of other data blocks. ;

The sending module 520 is configured to send, on the first carrier, a data signal to the receiving terminal, where the data signal includes a demodulation reference signal and the at least two data blocks;

The receiving module 530 is configured to receive a short control signal by using a second preset time, where the short control signal includes response information of the at least two data blocks, where the second preset time is the sending terminal from the sending station The interval between the end time of the data signal and the start time of receiving the short control signal.

In some possible embodiments of the present invention, the second preset time is not less than a first preset time, where the first preset time is that the receiving terminal sends an end time from receiving the data signal to sending the The interval between the start times of the short control signals.

Optionally, the data signal further includes at least one of the following: a reference signal for synchronization, a reference signal for reference signal received power RSRP measurement, a reference signal for channel state information CSI measurement, And a reference signal for interference measurement, a reference signal for position measurement, resource allocation information corresponding to the at least two data blocks, and modulation coding scheme MCS information corresponding to the at least two data blocks.

Optionally, the short control signal further includes control information, where the control information includes at least one of the following information: timing information, frequency offset information, RSRP measurement result, reference signal reception quality RSRQ measurement result, and received signal strength indication. RSSI measurement results, CSI measurement results, interference measurement results, and terminal location information.

Referring to FIG. 6, FIG. 6 is a schematic structural diagram of a data transmission system according to an embodiment of the present invention; as shown in FIG. 6, a data transmission system may include: a transmitting terminal 610 and a receiving terminal 620;

The sending terminal 610 is the terminal 500, and the receiving terminal 620 is the terminal 400.

For details, refer to the foregoing embodiment of the method, the embodiment shown in FIG. 4 and FIG. 5, and the details of the sending terminal 610 and the receiving terminal 620 are not described herein.

Please refer to FIG. 7. FIG. 7 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention, which may include at least one processor 701 (for example, a CPU, Central Processing Unit), at least one network interface or other communication interface, and a memory 702. Receiver 703, transmitter 704 and at least one communication bus are used to effect connection communication between these devices. The processor 701 is configured to execute an executable module, such as a computer program, stored in a memory. The memory 702 may include a high speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage. The communication connection between the system gateway and at least one other network element is implemented by at least one network interface (which may be wired or wireless), and an Internet, a wide area network, a local network, a metropolitan area network, etc. may be used.

As shown in FIG. 7, in some embodiments, the memory 702 stores program instructions, which may be executed by the processor 701. The processor 701 specifically performs the following steps: triggering the receiver 703 on the first carrier. Receiving a data signal, wherein the data signal includes a demodulation reference signal and at least two data blocks, and a transmission time length of a last one of the at least two data blocks is not greater than a transmission time length of the other data blocks, and then according to Demodulating the reference signal, performing demodulation and decoding processing on at least two data blocks received by the receiver 703, and triggering the transmitter 704 to send a short control on the first carrier after a first preset time a signal, the short control signal includes response information of the at least two data blocks, where the first preset time is a start time of the receiving terminal from receiving an end of the data signal to a start of sending the short control signal Interval of time;

or,

In some embodiments, the memory 702 stores program instructions, which may be executed by the processor 701. The processor 701 specifically performs the following steps: acquiring data to be transmitted, and dividing the data to be sent into at least two Data block, the transmission time length of the last data block of the at least two data blocks is not greater than the transmission time length of the other data blocks; triggering the transmitter 704 at the Transmitting, by the carrier, a data signal to the receiving terminal, where the data signal includes a demodulation reference signal and the at least two data blocks; after a second preset time, triggering the receiver 703 to receive a short control signal, the short control signal The response information of the at least two data blocks is included, and the second preset time is an interval time from the end time of transmitting the data signal by the sending terminal to the start time of receiving the short control signal.

In some embodiments, the transmitter 704 is specifically configured to send, by using frequency division multiplexing or code division multiplexing, the control information and the response information of the at least two data blocks on the first carrier; or The control information and the response information of the at least two data blocks are transmitted by time division multiplexing on the first carrier.

In the above embodiments, the descriptions of the various embodiments are different, and the details that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The data transmission method, system and terminal provided by the present invention are described in detail above. For those skilled in the art, according to the idea of the embodiment of the present invention, there are some changes in the specific implementation manner and application scope. In conclusion, the contents of the present specification should not be construed as limiting the invention.

Claims

A data transmission method, comprising:

The receiving terminal receives the data signal on the first carrier, where the data signal includes a demodulation reference signal and at least two data blocks, and a transmission time length of the last data block of the at least two data blocks is not greater than other data blocks. Length of transmission time;

The receiving terminal performs demodulation and decoding processing on the at least two data blocks according to the demodulation reference signal;

After receiving the first preset time, the receiving terminal sends a short control signal on the first carrier, where the short control signal includes response information of the at least two data blocks, where the first preset time is The interval between the end time of receiving the data signal and the start time of transmitting the short control signal by the receiving terminal.
The method of claim 1 wherein

Each of the at least two data blocks has the same transmission time length; or

The other data blocks except the last one of the at least two data blocks have the same transmission time length.
Method according to claim 1 or 2, characterized in that

The first preset time is not less than a conversion time of the receiving terminal from a receiving state to a transmitting state.
The method according to any one of claims 1 to 3, wherein the data signal further comprises at least one of the following information:

Reference signal for synchronization, reference signal for reference signal received power RSRP measurement, reference signal for channel state information CSI measurement, reference signal for interference measurement, reference signal for position measurement, the at least two The resource allocation information corresponding to the data blocks and the modulation and coding scheme MCS information corresponding to the at least two data blocks.
The method according to any one of claims 1 to 4, wherein the short control signal further comprises control information, the control information comprising at least one of the following information:

Timing information, frequency offset information, RSRP measurement result, reference signal reception quality RSRQ measurement result, received signal strength indication RSSI measurement result, CSI measurement result, interference measurement result, terminal position information.
The method according to any one of claims 1 to 5, wherein the receiving terminal sends a short control signal on the first carrier, including:

Transmitting, by the receiving terminal, the control information and the response information of the at least two data blocks by frequency division multiplexing or code division multiplexing on the first carrier;

or,

The receiving terminal transmits the control information and the response information of the at least two data blocks by time division multiplexing on the first carrier.
A data transmission method, comprising:

The transmitting terminal acquires data to be transmitted, and divides the to-be-sent data into at least two data blocks, and the transmission time length of the last one of the at least two data blocks is not greater than the transmission time length of the other data blocks;

Transmitting, by the transmitting terminal, a data signal to the receiving terminal on the first carrier, where the data signal includes a demodulation reference signal and the at least two data blocks;

After the second preset time, the sending terminal receives a short control signal, where the short control signal includes response information of the at least two data blocks, and the second preset time is that the sending terminal sends the data The interval between the end of the signal and the start of the receipt of the short control signal.
The method of claim 7 wherein:

Each of the at least two data blocks has the same transmission time length; or

The other data blocks except the last one of the at least two data blocks have the same transmission time length.
Method according to claim 7 or 8, characterized in that

The second preset time is not less than the first preset time, and the first preset time is an interval between the end time of receiving the data signal by the receiving terminal and the start time of sending the short control signal. .
The method according to any one of claims 7 to 9, wherein the data signal further comprises at least one of the following information:

Reference signal for synchronization, reference signal for reference signal received power RSRP measurement, reference signal for channel state information CSI measurement, reference signal for interference measurement, reference signal for position measurement, the at least two Resource allocation information corresponding to the data blocks and the at least two data The block corresponds to the modulation and coding scheme MCS information.
The method according to any one of claims 7 to 10, wherein the short control signal further comprises control information, the control information comprising at least one of the following information:

Timing information, frequency offset information, RSRP measurement result, reference signal reception quality RSRQ measurement result, received signal strength indication RSSI measurement result, CSI measurement result, interference measurement result, terminal position information.
A terminal, comprising:

a receiving module, configured to receive a data signal on the first carrier, where the data signal includes a demodulation reference signal and at least two data blocks, and a transmission time length of a last one of the at least two data blocks is not greater than Length of transmission time of other data blocks;

a processing module, configured to perform demodulation and decoding processing on the at least two data blocks according to the demodulation reference signal;

a sending module, configured to send, by using a first preset time, a short control signal on the first carrier, where the short control signal includes response information of the at least two data blocks, where the first preset time is The interval between the end time of receiving the data signal and the start time of transmitting the short control signal is received by the receiving terminal.
The terminal according to claim 12, characterized in that

Each of the at least two data blocks has the same transmission time length; or

The other data blocks except the last one of the at least two data blocks have the same transmission time length.
A terminal according to claim 12 or 13, wherein

The first preset time is not less than a transition time of the terminal from a receiving state to a sending state.
A terminal according to any one of claims 12 to 14, wherein:

The data signal also includes at least one of the following information:

Reference signal for synchronization, reference signal for reference signal received power RSRP measurement, reference signal for channel state information measurement CSI, reference signal for interference measurement, reference signal for position measurement, the at least two The resource allocation information corresponding to the data blocks and the modulation and coding scheme MCS information corresponding to the at least two data blocks.
A terminal according to any one of claims 12 to 15,

The short control signal further includes control information, the control information including at least one of the following information:

Timing information, frequency offset information, RSRP measurement results, reference signal reception quality RSRQ measurement results, received signal strength indication RSSI measurement results, CSI measurement results, interference measurement results, and terminal position information.
The terminal according to any one of claims 12 to 16, characterized in that

The sending module is specifically configured to send, by using frequency division multiplexing or code division multiplexing, the control information and the response information of the at least two data blocks on the first carrier;

or,

Transmitting the control information and the response information of the at least two data blocks by time division multiplexing on the first carrier.
A terminal, comprising:

a processing module, configured to acquire data to be sent, and divide the to-be-sent data into at least two data blocks, where a transmission time length of a last one of the at least two data blocks is not greater than a transmission time length of the other data blocks;

a sending module, configured to send, by using a first carrier, a data signal to the receiving terminal, where the data signal includes a demodulation reference signal and the at least two data blocks;

a receiving module, configured to receive, by using a second preset time, a short control signal, where the short control signal includes response information of the at least two data blocks, where the second preset time is sent by the sending terminal The interval between the end time of the data signal and the start time of receiving the short control signal.
The terminal according to claim 18, wherein each of the at least two data blocks has the same transmission time length; or

The other data blocks except the last one of the at least two data blocks have the same transmission time length.
A terminal according to claim 18 or 19, characterized in that

The second preset time is not less than the first preset time, and the first preset time is an interval between the end time of receiving the data signal by the receiving terminal and the start time of sending the short control signal. .
The terminal according to any one of claims 18 to 20, characterized in that

The data signal also includes at least one of the following information:

Reference signal for synchronization, reference signal for reference signal received power RSRP measurement, reference signal for channel state information CSI measurement, reference signal for interference measurement, reference signal for position measurement, the at least two The resource allocation information corresponding to the data blocks and the modulation and coding scheme MCS information corresponding to the at least two data blocks.
The terminal according to any one of claims 18 to 21, wherein the short control signal further comprises control information, and the control information comprises at least one of the following information:

Timing information, frequency offset information, RSRP measurement result, reference signal reception quality RSRQ measurement result, received signal strength indication RSSI measurement result, CSI measurement result, interference measurement result, terminal position information.
A data transmission system, comprising: a transmitting terminal and a receiving terminal;

The transmitting terminal is the terminal according to any one of claims 18 to 22, and the receiving terminal is the terminal according to any one of claims 12 to 17.