WO2020118720A1

WO2020118720A1 - Data transmission method and device

Info

Publication number: WO2020118720A1
Application number: PCT/CN2018/121317
Authority: WO
Inventors: 贾树葱; 任占阳
Original assignee: 华为技术有限公司
Priority date: 2018-12-14
Filing date: 2018-12-14
Publication date: 2020-06-18
Also published as: CN113169835A; CN113169835B

Abstract

Provided are a data transmission method and device, wherein the method comprises: in the first fixed frame period FFP, the terminal device receives the first control information from the network device; the first control information is used to schedule the terminal device to perform uplink data transmission in the second FFP; the second FFP is located after the first FFP; when the terminal device receives the second control information sent by the network device in the second FFP, in the second FFP, the terminal device performs uplink data transmission according to the first control information.

Description

Data transmission method and device

Technical field

This application relates to the technical field of wireless communication, and in particular to a data transmission method and device.

Background technique

MulteFire is a new technology emerging in the field of wireless communication, which can apply long-term evolution (LTE) to unlicensed spectrum to provide high-performance communication services. In the future, MulteFire may also apply NR technology to unlicensed spectrum based on new radio (NR) technology. Different countries have different regulations on the use of unlicensed spectrum. For example, in the European market, base stations must use unlicensed spectrum by listening before talking (LBT). For the specific LBT mechanism, the corresponding processes of frame-based equipment (FBE) and load-based equipment (LBE) are different. For FBE, the process of LBT is as follows: Before transmission, the base station needs to perform clear channel assessment (CCA). If the assessment result is that the channel is not occupied, then send the signal immediately, otherwise until the next fixed frame period (fixed frame) Before period, FFP), the signal cannot be transmitted. The signal here includes data, control information, and reference signal. FFP is composed of channel occupation time (COT) and idle period (idle period), where COT is between 1ms and 10ms, and the minimum idle period is 5% of the channel occupation time. At the end of the idle period, The base station performs a new CCA test. After the LBT succeeds, the base station can send downlink control information (DCI) in the unlicensed spectrum, where part of the DCI can be used to schedule terminal devices for uplink data transmission.

The terminal device can monitor signals sent by the base station in the unlicensed spectrum, such as a cell-specific reference signal (CRS) sent by the base station, so that it can determine whether the base station succeeds in LBT and sends a downlink signal. If the terminal device determines that the base station LBT is successful and sends a downlink signal, it can receive the signal sent by the base station in the unlicensed spectrum. If the terminal device receives the DCI sent by the base station to schedule the terminal device for uplink data transmission, during the period when the base station occupies the unlicensed spectrum, if the maximum channel occupation time (MCOT) of the base station has not been used up, the terminal The device can send the uplink data within 16 microseconds after the base station sends the downlink signal according to the DCI schedule. In this case, the terminal device does not need to perform LBT.

The terminal device monitors the signal sent by the base station in the unlicensed spectrum to determine whether the base station succeeds in LBT and sends a downlink signal, and there may be false alarms and missed detections. Among them, "false alarm" means that the base station does not succeed in LBT or does not send a downlink signal due to other reasons, but the UE detects that the base station LBT succeeds and sends a downlink signal; "missing detection" means that the base station LBT succeeds and sends a downlink signal, However, after detection, the UE considers that the base station did not succeed in LBT or did not send a downlink signal due to other reasons. Because the time of FFP is very short, the time-frequency resources of DCI sent by the base station and the time-frequency resources of the uplink data transmission scheduled by the DCI may not be in the same FFP. In this case, if the terminal equipment has false alarms or leaks Checking will cause the uplink data transmitted by the terminal device to collide with the uplink data transmitted by other devices according to DCI, resulting in mutual interference. Moreover, because the terminal device does not perform LBT, it mistakenly thinks that the base station has sent a downlink signal, and performs uplink data transmission within 16 microseconds after the wrong base station downlink signal transmission ends. Therefore, the terminal device is false alarm. The uplink data transmission in violation of FBE's unlicensed spectrum regulations.

For this reason, how to improve the efficiency of data transmission in unlicensed spectrum and compliance with regulations is an urgent problem to be solved.

Summary of the invention

Embodiments of the present application provide a data transmission method and device to improve the efficiency of data transmission in an unlicensed spectrum.

In a first aspect, an embodiment of the present application provides a data transmission method, including: within a first fixed frame period FFP, a terminal device receives first control information from a network device; the first control information is used to schedule the terminal The device performs uplink data transmission within the second FFP; the second FFP is located after the first FFP, and there are N FFPs between the second FFP and the first FFP, where N is greater than or equal to An integer of 0; when the terminal device receives that the network device sends second control information in the second FFP, in the second FFP, uplink data transmission is performed according to the first control information.

Through the above method, when the first control information sent by the network device and the uplink subframe for the uplink data transmission of the terminal device scheduled by the first control information are not in the same FFP, the terminal device can determine whether the network device is in the second FFP The second control information is sent internally to determine whether to perform uplink data transmission according to the first control information. When the terminal device receives the second control information, the terminal device performs uplink data transmission according to the first control information without collision with the data transmission of other devices, which improves the efficiency of data transmission in the unlicensed spectrum.

In an optional implementation manner, the method further includes: when the terminal device determines that the network device has not sent the second control information in the second FFP, ignoring the first control information.

Through the above method, even if the terminal device fails to detect and does not receive the second control information in the second FFP, the terminal device directly ignores the first control information after the missed detection, so that the first control information will not be sent to the subsequent FFP Delay, so it will not collide with the uplink data transmission of other terminal equipment.

In an optional implementation manner, the terminal device receiving the second control information sent by the network device in the second FFP includes: in the second FFP, the terminal device is in the network device The candidate position of the physical downlink control channel PDCCH or the enhanced physical downlink control channel EPDCCH is sent, and the cyclic redundancy of the data information carried in the candidate position is calibrated according to at least one radio network temporary identity (RNTI) preset Verification (cyclic redundancy check, CRC), the at least one radio network temporary identifier RNTI may be a cell radio network temporary identifier (cell RNTI, C-RNTI), system information radio network temporary identifier (system information RNTI, SI-RNTI ), paging wireless network temporary identifier (paging RNTI, P-RNTI), random access wireless network temporary identifier (random access RNTI, RA-RNTI), temporary cell wireless network temporary identifier (temporary cell RNTI, TC-RNTI), Semi-persistent scheduling cell wireless network temporary identification (semi-persistence, cell RNTI, SPS-C-RNTI), physical uplink control channel transmission power control, wireless network temporary identification (transmit power, control-physical uplink, control channel-RNTI, TPC-PUCCH-RNTI ), the physical uplink shared channel transmission power control wireless network temporary identification (transmit power control-physical uplink shared channel-RNTI, TPC-PUSCH-RNTI), multimedia broadcast multicast service wireless network temporary identification (multimedia broadcast broadcast multicast service RNTI, M- One or more of RNTI); when the terminal device successfully verifies the CRC, receiving the data information carrying the second control information; when the terminal device uses all preset RNTI When CRC verification of all candidate positions of PDCCH or EPDCCH is unsuccessful, the terminal device determines that the network device has not sent the second control information in the second FFP.

Through the above method, the terminal device checks whether the network device sends the second control information in the second FFP through the CRC. At this time, the probability of false alarm is very small, thereby reducing the uplink data transmission between the terminal device and other devices. The probability of collision of data transmission improves the efficiency of data transmission in the unlicensed spectrum.

In an optional implementation manner, the second control information is used to schedule the terminal device for uplink data transmission; or, the second control information is used to schedule the terminal device for downlink data reception Or, the second control information is used to instruct the terminal device to perform uplink transmission power adjustment; or, the second control information is used to instruct the terminal device to receive system broadcast information; or, the second The control information is used to instruct the terminal device to receive paging information; or, the CRC of the second control information is scrambled by C-RNTI (Cell RNTI, Cell Radio Network Temporary Identity); or, the second control information CRC is scrambled by SI-RNTI; or, the CRC of the second control information is scrambled by P-RNTI; or, the CRC of the second control information is scrambled by RA-RNTI; or, the second control information CRC is scrambled by TC-RNTI; or, the CRC of the second control information is scrambled by SPS-C-RNTI; or, the CRC of the second control information is scrambled by TPC-PUCCH-RNTI; or, The CRC of the second control information is scrambled by TPC-PUSCH-RNTI; or, the CRC of the second control information is scrambled by M-RNTI.

In a second aspect, an embodiment of the present application provides a data transmission method, including: a network device sends first control information to a terminal device within a first frame period FFP; the first control information is used to schedule the terminal device to Uplink data transmission is performed in the second FFP; the second FFP is located after the first FFP, and there are N FFPs between the second FFP and the first FFP, where N is greater than or equal to 0 Integer; the network device sends second control information to the terminal device within the second FFP.

In an optional implementation manner, the second control information is used to schedule the terminal device to perform uplink data transmission; or, the second control information is used to schedule the terminal device to receive downlink data; or , The second control information is used to instruct the terminal device to perform uplink transmission power adjustment; or, the second control information is used to instruct the terminal device to receive system broadcast information; or, the second control information is used to Instruct the terminal device to receive paging information; or, the CRC of the second control information is scrambled by C-RNTI; or, the CRC of the second control information is scrambled by SI-RNTI; or, the second The CRC of the control information is scrambled by P-RNTI; or, the CRC of the second control information is scrambled by RA-RNTI; or, the CRC of the second control information is scrambled by TC-RNTI; or, the first The CRC of the second control information is scrambled by SPS-C-RNTI; or, the CRC of the second control information is scrambled by TPC-PUCCH-RNTI; or, the CRC of the second control information is scrambled by TPC-PUSCH-RNTI Scrambling; or, the CRC of the second control information is scrambled by M-RNTI.

In a third aspect, an embodiment of the present application provides a data transmission method, including: a network device determines to occupy an unlicensed spectrum within a fourth fixed frame period FFP; the network device passes the unlicensed spectrum within the fourth FFP Sending fourth control information to a terminal device; the fourth control information is used to instruct the network device to occupy the unlicensed spectrum in the fourth FFP, and is used to instruct the terminal device according to the network device in The third control information sent in the third FFP performs uplink data transmission in the fourth FFP, the third FFP is located before the fourth FFP, and is spaced from the fourth FFP by M pieces FFP, M is an integer greater than or equal to 0.

Through the above method, when the third control information sent by the network device and the uplink subframe for the uplink data transmission of the terminal device scheduled by the third control information are not in the same FFP, since the third control information cannot take effect alone, the third control information The four control information indicates the FFP in which the third control information is in effect. Therefore, when the terminal device performs uplink data transmission according to the third control information, it must be within the FFP where the network device occupies the unlicensed spectrum, so the uplink of the terminal device The data will not collide with the uplink data of other terminal equipment, which improves the efficiency of data transmission in the unlicensed spectrum.

In an optional implementation manner, before the network device determines to occupy the unlicensed spectrum in the fourth FFP, the method further includes: the network device sending the third device to the terminal device in the third FFP Three control information; the third control information is used to schedule the terminal device to perform uplink data transmission.

In an optional implementation manner, the fourth control information includes a first information field, and the first information field includes K bits; when the K bits in the first information field take the value of first The preset value is used to instruct the network device to occupy the unlicensed spectrum in the fourth FFP, and K is an integer greater than or equal to 0.

In an optional implementation manner, the fourth control information includes a second information field, and the second information field includes L bits; when the L bits in the second information field take the value of second The preset value is used to instruct the terminal device to perform uplink data transmission in the fourth FFP according to the third control information, and L is an integer greater than 0.

In a fourth aspect, an embodiment of the present application provides a data transmission method, including: a terminal device receiving third control information from a network device through an unlicensed spectrum within a third fixed frame period FFP; the third control information is used to Scheduling the terminal device to perform uplink data transmission; when the terminal device is in the fourth FFP and receives the fourth control information from the network device through the unlicensed spectrum, then according to the third control information in the fourth Uplink data transmission in FFP; wherein the fourth control information is used to instruct the network device to occupy the unlicensed spectrum in the fourth FFP, and is used to instruct the terminal device according to the network The third control information sent by the device in the third FFP performs uplink data transmission in the fourth FFP, and the third FFP is located before the fourth FFP and is spaced from the fourth FFP M FFPs, M is an integer greater than or equal to 0.

In an optional implementation manner, the terminal device receiving the fourth control information from the network device through the unlicensed spectrum within the fourth fixed frame period FFP includes: in the fourth FFP, the The terminal device sends the physical downlink control channel PDCCH or the enhanced physical downlink control channel EPDCCH candidate position at the network device according to the preset at least one radio network temporary identity (RNTI) to the candidate position carried in the candidate position Cyclic redundancy check (CRC) of the data information is verified; when the terminal device verifies the CRC successfully and obtains K bits from the preset position of the data information carried in the candidate position If the value is the first preset value, it is determined that the data information carried in the candidate position includes the fourth control information, where the preset position is the position of the first information field in the fourth control information.

According to a fifth aspect, an embodiment of the present application provides a terminal device. The terminal device includes a memory, a transceiver, and a processor, where: the memory is used to store instructions; the processor is used to execute instructions stored in the memory and control the transceiver to perform Signal reception and signal transmission, when the processor executes the instructions stored in the memory, it is used to execute the method in any one of the above possible designs of the first or first aspect, or execute the fourth aspect or any of the fourth aspect A possible design method.

According to a sixth aspect, an embodiment of the present application provides a terminal device for implementing the first aspect, or the fourth aspect, or any method in the first aspect, or any method in the fourth aspect, including Corresponding functional modules, including, for example, a processing unit, a receiving unit, a sending unit, etc., are respectively used to implement the steps in the above method.

According to a seventh aspect, an embodiment of the present application provides a network device, the network device includes a memory, a communication interface, and a processor, wherein: the memory is used to store instructions; the processor is used to execute instructions stored in the memory and control the communication interface to perform Signal reception and signal transmission, when the processor executes the instructions stored in the memory, it is used to perform the method in the second aspect or any possible design of the second aspect, or perform the third aspect or any of the third aspect A possible design approach.

In an eighth aspect, an embodiment of the present application provides a network device for performing the method in the second aspect or any possible design in the second aspect, or performing the third aspect or any one of the third aspect The methods in the possible design, including corresponding functional modules, for example, including a processing unit, a receiving unit, a sending unit, etc., are respectively used to implement the steps in the above method.

An embodiment of the present application provides a data transmission apparatus, including: a memory and a processor, the memory is used to store instructions, the processor is used to execute the instructions stored in the memory, and execute the instructions stored in the memory As a result, the processor is used to perform any of the methods in the above possible designs.

An embodiment of the present application provides a computer-readable storage medium that stores computer-readable instructions, and when the data transmission device reads and executes the computer-readable instructions, causes the data transmission device to perform any of the above A possible design method.

An embodiment of the present application provides a computer program product, including computer readable instructions, which, when a data transmission device reads and executes the computer readable instructions, causes the data transmission device to perform any of the above-mentioned possible design methods.

An embodiment of the present application provides a chip that is connected to a memory and used to read and execute a software program stored in the memory to implement any one of the above-mentioned possible design methods.

BRIEF DESCRIPTION

FIG. 1 is a schematic diagram of a wireless frame structure provided by an embodiment of the present application;

2 is a schematic structural diagram of a wireless frame provided by an embodiment of the present application;

3 is a schematic diagram of a data scheduling provided by an embodiment of this application;

4 is a schematic flowchart of a data transmission method according to an embodiment of the present application;

5 is a schematic diagram of a data scheduling provided by an embodiment of this application;

6 is a schematic diagram of data scheduling provided by an embodiment of the present application;

7 is a schematic flowchart of a data transmission method according to an embodiment of the present application;

8 is a schematic diagram of data scheduling provided by an embodiment of the present application;

9 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

10 is a schematic structural diagram of a terminal device according to an embodiment of this application;

11 is a schematic structural diagram of a network device according to an embodiment of this application;

12 is a schematic structural diagram of a network device according to an embodiment of this application.

detailed description

The embodiments of the present application will be further described in detail below with reference to the drawings.

The embodiments of the present application can be applied to MulteFire or other wireless communication systems using unlicensed spectrum, including but not limited to: new radio (NR) system, global mobile communication (GSM) system, code division Multiple access (code division multiple access, CDMA) system, wideband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (general packet radio service (GPRS), long-term evolution (LTE) System (including time division (TD)-LTE and frequency division (FD)-LTE), advanced long-term evolution (LTE-A) system, universal mobile communication system (universal mobile telecommunication system) , UMTS), evolved long term evolution (eLTE) system, and future communication system, etc., without limitation here.

In the embodiments of the present application, the terminal device may be a device with wireless transceiver function or a chip that can be installed in any device, and may also be called a user equipment (UE), an access terminal, a user unit, and a user station , Mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user device. The terminal devices in the embodiments of the present application may be mobile phones, tablet computers, computers with wireless transceiver functions, virtual reality (virtual reality, VR) terminals, augmented reality (augmented reality, AR) terminals, industrial Wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grids, transportation safety The wireless terminal in the smart phone, the wireless terminal in the smart city (smart city), the wireless terminal in the smart home (smart home), etc.

The network equipment may be an evolutionary base station (evolutional node B, eNB) in the LTE system, a global mobile communication (GSM) system or a code division multiple access (CDMA) system. A base station (base transceiver) (BTS) can also be a base station (nodeB, NB) in a wideband code division multiple access (wideband code division multiple access, WCDMA) system.

In order to improve spectrum utilization, LTE system, NR system, etc. can be applied to unlicensed spectrum through MulteFire technology to meet the growing demand for mobile broadband services. Taking the TD-LTE system as an example, in the TD-LTE system, due to the need for uplink and downlink time conversion, each radio frame is designed with an uplink-downlink configuration as shown in Table 1 (Uplink-downlink configuration) )structure. The wireless frame uses two types of downlink-to-uplink switching point period (Downlink-to-Uplink Switch-point periodicity), 5ms and 10ms. The length of a radio frame is 10ms, which is composed of two half-frames with a length of 5ms, and each half-frame is composed of 5 subframes with a length of 1ms. Therefore, the entire frame can also be understood as divided into 10 subframes with a length of 1 ms as data scheduling and transmission units. Among them, the subframes #1 and #6 can be configured as special subframes, and the subframe contains three special time slots, and the specific content of the special time slots will not be repeated.

Table 1

In Table 1, D represents a downlink subframe, U represents an uplink subframe, and S represents a special subframe. For the convenience of description, in the following description, the manner of expressing subframes is used, which will not be described one by one here.

In the embodiment of the present application, in order to realize the uplink-downlink configuration of the FBE mode LBT, the uplink-downlink configuration with a downlink-to-uplink switching point period of 5 ms in Table 1 may be performed Changes, the corresponding FFP is 5ms, configuration 0 to configuration 2 can refer to Figure 1. Correspondingly, the uplink-downlink configuration with a downlink-to-uplink switching point period of 10 ms in Table 1 can be modified to realize the uplink-downlink configuration of FBE mode LBT, configuration 3 For configuration 5, refer to FIG. 2 for details. Among them, in FIGS. 1 and 2, D represents a downlink subframe, U represents an uplink subframe, and S represents a special subframe. It should be noted that since the idle period in an FFP needs to be not less than 5% of the FFP, so if the FFP is 5 ms, take the DSUUU with configuration 0 shown in FIG. 1 as an example, the total time of 5 subframes of the DSUUU needs to be less than 4.75 ms This can be achieved by reducing the number of symbols in the S subframe.

Of course, the above is only an example, and there may be other configuration methods for the downlink time-frequency resource and the uplink time-frequency resource in the FFP, and no further examples will be described here.

At present, when the terminal device receives the DCI carried by the network device on the physical downlink control channel (physical downlink control channel, PDCCH) or enhanced physical downlink control channel (enhanced physical downlink control channel, EPDCCH), the terminal device can only send according to the DCI instructions Upstream data. Considering that DCI wireless signal transmission takes some time, it takes some time for the terminal device to receive and correctly decode the instructions in the DCI. It also takes some time for the terminal device to encode the data packet according to the instructions. Therefore, the terminal device uplink data transmission is located The frame needs to be after the DCI downlink subframe. Taking the TD-LTE system as an example, if the DCI is sent by the network device to the terminal device in the nth subframe, the terminal device should transmit data in the n+k subframe For network devices, k is usually greater than or equal to 4, and n+k subframes need to be uplink subframes. Therefore, if the MulteFire technology completely follows the uplink data transmission mode of the TD-LTE system, there may be some problems.

For example, in an unlicensed spectrum, the network device performs LBT when FFP is turned on. If the LBT succeeds, the downstream signal and the upstream signal can be sent within the FFP; if the LBT fails, the downstream signal and the upstream signal cannot be sent within the FFP. When the FFP length is 5ms. Because the uplink data transmission of the terminal device needs to be sent in n+k subframes, k is usually greater than or equal to 4, and n+k needs to be an uplink subframe, so it is possible to carry a DCI subframe and DCI indication transmission indicated by the uplink scheduling The upstream subframes of upstream data are not in the same FFP. At this time, if the terminal equipment completely follows the TD-LTE operation process, it will conflict with the existing unlicensed spectrum regulations, that is, regulatory risks. Refer to Figure 3 for details. In FIG. 3, the network device may carry the PDCCH or EPDCCH in the downlink symbols of the D subframe and the S subframe. The first case: the PDCCH of the S subframe PDCCH of the first FFP or the DCI of the EPDCCH channel can instruct the terminal device to send uplink data in the first U uplink subframe of the second FFP, when the network device LBT before the second FFP If successful, the terminal device can send uplink data according to the DCI instructions. When the terminal device misses detection, it should have transmitted uplink data in the first U uplink subframe of the second FFP. Due to the missing detection, it is considered that the network device did not succeed in LBT before the second FFP or did not due to other reasons. When the second FFP sends a downlink signal, the terminal device may defer data transmission to the FFP after the second FFP. At this time, the uplink data transmission of the terminal device may collide with the uplink data transmission of other terminal devices.

The second case: the PDCCH of the S subframe PDCCH of the third FFP or the DCI of the EPDCCH channel can instruct the terminal device to send uplink data in the first U uplink subframe of the fourth FFP, when the network device LBT before the fourth FFP When it fails, this network device does not send a downlink signal, but due to a false alarm, the terminal device believes that the network device LBT is successful and sends a downlink signal. At this time, the terminal device does not perform LBT, and does not meet the conditions of the MCOT sharing mechanism. Upstream data is sent in an FFP. At this time, the upstream data transmission of the terminal device violates the LBT regulations of the FBE in the unlicensed spectrum, and may collide with the data transmission of other terminal devices or network devices.

To this end, the behavior of the terminal equipment needs to be regulated to reduce the regulatory risk of the uplink data transmission of the terminal equipment, and also to ensure that the data transmission of the terminal equipment does not collide with the data transmission of other terminal equipment, which will be described in detail below.

With reference to the foregoing description, as shown in FIG. 4, it is a schematic flowchart of a data transmission method according to an embodiment of the present application. Referring to Figure 4, the method includes:

Step 401: The network device sends the first control information to the terminal device in the first FFP.

Before step 401, the network device may occupy the unlicensed spectrum through LBT.

After the network device occupies the unlicensed spectrum, the first control information may be sent through the unlicensed spectrum in the first FFP.

Optionally, the first FFP includes a first radio frame. For example, the first radio frame may include 5 subframes. The uplink-downlink configuration of the first radio frame may be any of the One configuration may also be other configurations, which will not be repeated here.

Optionally, the second subframe of the first radio frame is a special subframe, and the network device may carry the first control information through the PDCCH or EPDCCH in the special subframe of the first radio frame. The first control information is used to schedule the terminal device to perform uplink data transmission in the second FFP.

Optionally, the first subframe of the first radio frame is a downlink subframe, and the network device may carry the first control information through the PDCCH or EPDCCH in the downlink subframe of the first radio frame. The first control information is used to schedule the terminal device to perform uplink data transmission in the second FFP.

Optionally, the second FFP is located after the first FFP, and there are N FFPs separated from the first FFP, and N is an integer greater than or equal to 0.

Optionally, the value of N may be a fixed value.

Optionally, the value of N may be a non-fixed value. In this case, the S FFPs after the first FFP are all candidate second FFPs, where S is an integer greater than 0; Sequentially try to receive the second control information for the Zth FFP after the first FFP, where Z is a positive integer less than or equal to S; when the terminal device detects the second control information for the Zth FFP after the first FFP , The N value is determined to be Z-1; when the terminal device does not receive the second control information in the S FFPs after the first FFP, the N value is determined to be S-1; optionally, the first The control information is located in the PDCCH or ePDCCH of the downlink subframe or special subframe with the subframe number n in the first FFP, and the first control information is used to schedule the terminal device to have the subframe number (n+N×V +k) data transmission on the uplink subframe, the uplink subframe with the subframe number (n+N×V+k) is located in the second FFP, where V represents the number of subframes contained in one FFP, Optionally, the value of V is 5; the value of k can be the subframe interval between the downlink control information for scheduling uplink data transmission and the corresponding uplink data transmission in the existing TD-LTE communication system, optionally, k The value of can be 4, 6, 7, etc.

Optionally, the first control information is located in a PDCCH or ePDCCH of a downlink subframe or a special subframe whose subframe number is n in the first FFP, and the first control information is used to schedule the terminal device in a subframe Data transmission on the uplink subframe numbered n+k; when the terminal device receives the first control information and receives that the network device sends the second control information in the second FFP, the terminal device Data transmission is performed on the uplink subframe whose subframe number is (n+N×V+k), where V represents the number of subframes included in an FFP, optional, V takes a value of 5; k can take a value For the subframe interval between the downlink control information scheduling uplink data transmission and the corresponding uplink data transmission in the existing TD-LTE communication system, optionally, the value of k may be 4, 6, 7 and so on.

Exemplarily, the first control information is used to schedule the terminal device to perform uplink data transmission in the first uplink subframe in the second FFP. Of course, the first control information may also schedule the terminal device to perform uplink data transmission in other uplink subframes in the second FFP, which will not be illustrated one by one here.

Exemplarily, the first control information is DCI carried in the PDCCH or the EPDCCH.

Step 402: The network device sends second control information to the terminal device in the second FFP.

Before step 402, the network device may occupy the unlicensed spectrum through LBT.

After the network device occupies the unlicensed spectrum, the second control information may be sent through the unlicensed spectrum in the second FFP.

Optionally, the second FFP includes a second radio frame. For example, the second radio frame may include 5 subframes. The uplink-downlink configuration of the second radio frame may be any of the One configuration may also be other configurations, which will not be repeated here.

Exemplarily, the first subframe of the second radio frame is a downlink subframe, and the network device may carry the second control information through the PDCCH or EPDCCH in the first subframe of the second radio frame.

Exemplarily, the second control information is the DCI carried by the PDCCH or EPDCCH in the first subframe of the second radio frame.

Optionally, the second control information is used to schedule the terminal device to perform uplink data transmission;

Or, the second control information is used to schedule the terminal device to receive downlink data;

Or, the second control information is used to instruct the terminal device to perform uplink transmission power adjustment;

Or, the second control information shown is used to instruct the terminal device to receive system broadcast information;

Or, the second control information is used to instruct the terminal device to receive paging information;

Or, the CRC of the second control information is scrambled by C-RNTI;

Or, the CRC of the second control information is scrambled by SI-RNTI;

Or, the CRC of the second control information is scrambled by P-RNTI;

Or, the CRC of the second control information is scrambled by RA-RNTI;

Or, the CRC of the second control information is scrambled by TC-RNTI;

Or, the CRC of the second control information is scrambled by SPS-C-RNTI;

Or, the CRC of the second control information is scrambled by TPC-PUCCH-RNTI;

Or, the CRC of the second control information is scrambled by TPC-PUSCH-RNTI;

Alternatively, the CRC of the second control information is scrambled by M-RNTI.

For example, as shown in FIG. 5, the subframes included in the first radio frame included in the first FFP are D, S, U, U, U in sequence; the subframes included in the second radio frame included in the second FFP The order is D, S, U, U, U. The network device carries the first control information through the PDCCH in the S subframe of the first radio frame, and carries the second control information through the PDCCH in the first D subframe of the second radio frame. The first control information is used to schedule the terminal device to perform uplink data transmission in the first U uplink subframe in the second FFP; the second control information is used to schedule the terminal device to the last U uplink subframe in the second FFP Uplink data transmission occurs in the frame.

For another example, as shown in FIG. 6, the subframes included in the first radio frame included in the first FFP are D, S, U, U, U in sequence; the subframes included in the second radio frame included in the second FFP The frames are D, S, U, U, U in sequence. The network device carries the first control information through the PDCCH in the first D subframe of the first radio frame, and carries the second control information through the PDCCH in the first D subframe of the second radio frame. The first control information is used to schedule the terminal device to perform uplink data transmission in the first U uplink subframe in the second FFP; the second control information is used to schedule the first D subdevice in the second FFP The downlink data is received in the frame.

Step 403: In the first FFP, the terminal device receives the first control information from the network device.

The first control information is used to schedule the terminal device to perform uplink data transmission in the second FFP;

Optionally, the value of N may be a fixed value.

Optionally, the value of N may be a non-fixed value. In this case, the S FFPs after the first FFP are all candidate second FFPs, where S is an integer greater than 0; Sequentially try to receive the second control information for the Zth FFP after the first FFP, where Z is a positive integer less than or equal to S; when the terminal device detects the second control information for the Zth FFP after the first FFP At the time, the N value is determined as Z-1; when the terminal device does not receive the second control information in the S FFPs after the first FFP, the N value is determined as S-1;

Optionally, the first control information is located in a PDCCH or ePDCCH of a downlink subframe or a special subframe whose subframe number is n in the first FFP, and the first control information is used to schedule the terminal device in a subframe Data transmission is performed on the uplink subframe with the number (n+N×V+k), and the uplink subframe with the subframe number (n+N×V+k) is located in the second FFP, where V represents an FFP The number of subframes included in, optional, V value is 5; k can be a value between the downlink control information scheduling the uplink data transmission and the corresponding uplink data transmission in the existing TD-LTE and other communication systems Frame interval, optional, the value of k can be 4, 6, 7, etc.

Step 404: When the terminal device receives that the network device sends second control information in the second FFP, in the second FFP, uplink data transmission is performed according to the first control information.

Optionally, in the embodiment of the present application, in the second FFP, the terminal device may send a PDCCH or EPDCCH candidate position at the network device according to at least one preset wireless network temporary identifier (radio network temporary) identity, RNTI) verifies the cyclic redundancy check (CRC) of the data information carried in the candidate location; when the terminal device successfully verifies the CRC, it can receive the data information Carrying the second control information; when the terminal device fails to perform CRC verification of the candidate positions of all PDCCH or EPDCCH using all preset RNTIs, the terminal device determines that the network device is in the The second control information is not sent in the second FFP.

Optionally, the at least one radio network temporary identifier RNTI may be C-RNTI (Cell RNTI, Cell Radio Network Temporary Identifier), SI-RNTI (System Information RNTI, System Information Radio Network Temporary Identifier), P-RNTI (Paging RNTI, paging radio network temporary identity), RA-RNTI (Random Access RNTI, random access wireless network temporary identity), TC-RNTI (Temporary Cell RNTI, temporary cell wireless network temporary identity), SPS-C-RNTI (Semi persistence Scheduling Cell RNTI (transient identification of semi-persistent scheduling cell wireless network), TPC-PUCCH-RNTI (Transmit Power Control-Physical Uplink Control Channel-RNTI), TPC-PUSCH-RNTI (Transmit Power-Control-Physical Uplink Shared Channel-RNTI, physical uplink shared channel transmission power control wireless network temporary identifier), M-RNTI (MBMS RNTI, multimedia broadcast multicast service wireless network temporary identifier) one or more.

Optionally, in the embodiment of the present application, in the second FFP, the terminal device may first detect whether a downlink signal sent by the network device, such as a cell-specific reference signal (cell-specific referential signal, CRS). When the detection result of the terminal device considers that the network device has sent a downlink signal, at the candidate position where the network device sends the PDCCH or EPDCCH, the candidate position is selected according to at least one preset radio network temporary identity (RNTI). Cyclic redundancy check (CRC) verification of the carried data information; when the terminal device successfully verifies the CRC, it may receive the second control information carried in the data information; When the terminal device fails to perform CRC verification of the candidate positions of all PDCCHs or EPDCCHs by using all preset RNTIs, the terminal device determines that the network device does not send the second in the second FFP Control information.

Optionally, the at least one wireless network temporary identifier RNTI may be C-RNTI, SI-RNTI, P-RNTI, RA-RNTI, TC-RNTI, SPS-C-RNTI, TPC-PUCCH-RNTI, TPC-PUSCH -One or more of RNTI and M-RNTI.

Correspondingly, when the detection result of the terminal device considers that the network device has not sent the downlink signal, it may be determined that the network device has not sent the second control information.

When the terminal device fails to verify the CRC, it may be determined that the second control information is not received in the second FFP. Optionally, when the terminal device determines that the network device has not sent the second control information in the second FFP, the terminal device ignores the first control information, that is, the terminal device 1. The content indicated by the control information.

Optionally, when the terminal device does not receive the first control message of the first FFP, but successfully receives the second control message in the second FFP, and the second control message in the second FFP indicates that the terminal device is in the current FFP When an uplink subframe is used for uplink data transmission, if the uplink subframe is not the first uplink subframe in the current FFP, the terminal device may not execute the specific uplink subframe in the current FFP indicated by the second control message. Upstream data transmission.

Through the above method, in the unlicensed spectrum, especially in the FBE mode unlicensed spectrum, the uplink subframe in which the first control information sent by the network device and the terminal device scheduled by the first control information perform uplink data transmission is not In the same FFP, the terminal device can check whether the network device sends the second control information in the second FFP through the CRC. At this time, the probability of false alarm is very small. At this time, the uplink data transmission of the terminal device will not be The data transmission of the equipment collides, which improves the efficiency of data transmission in the unlicensed spectrum. Correspondingly, even if the terminal device misses the detection, the terminal device directly ignores the first control information after the missed detection, so that the first control information will not be delayed to the subsequent FFP, so it will not be linked to the uplink data of the normal terminal device The transmission collided.

In the embodiment of the present application, the collision of the uplink data transmission of the terminal device with the uplink data transmission of other terminal devices can also be avoided in other ways, which will be described in detail below.

With reference to the foregoing description, as shown in FIG. 7, it is a schematic flowchart of a data transmission method according to an embodiment of the present application. Referring to Figure 7, the method includes:

Step 701: The network device determines to occupy the unlicensed spectrum in the fourth FFP.

The network equipment can occupy the unlicensed spectrum through LBT, and the specific content of LBT will not be repeated here.

Before step 701, the network device may occupy the unlicensed spectrum in the third FFP through LBT. The third FFP is located before the fourth FFP and is separated from the fourth FFP by M FFPs, and M is an integer greater than or equal to 0.

After the network device occupies the unlicensed spectrum in the third FFP, it may send the third control information to the terminal device through the unlicensed spectrum in the third FFP.

Optionally, the third FFP includes a third radio frame. For example, the third radio frame may include 5 subframes, and the uplink-downlink configuration of the fourth radio frame may be any of the configurations shown in FIG. 1 or other configurations, which will not be repeated here. .

Exemplarily, the second subframe of the third radio frame is a special subframe, and the network device may carry the third control information through the PDCCH or EPDCCH in the special subframe of the third radio frame. The third control information is used to schedule the terminal device to perform uplink data transmission.

Optionally, the first subframe of the third radio frame is a downlink subframe, and the network device may carry the third control information through the PDCCH or EPDCCH in the downlink subframe of the third radio frame. The third control information is used to schedule the terminal device to perform uplink data transmission.

Exemplarily, the third control information is used to schedule the terminal device to perform uplink data transmission in the first uplink subframe within the FFP occupied by the network device. Of course, the third control information can also schedule the terminal device to perform uplink data transmission in other uplink subframes within the FFP occupied by the network device, and no further examples will be described here.

Exemplarily, the third control information is DCI carried in the PDCCH or the EPDCCH.

Step 702: The network device sends fourth control information to the terminal device through the unlicensed spectrum in the fourth FFP.

The fourth control information is used to instruct the network device to occupy the unlicensed spectrum in the fourth FFP, and to instruct the terminal device to send the third control in the third FFP according to the network device Information, uplink data transmission is performed in the fourth FFP.

Optionally, the fourth FFP includes a fourth radio frame. For example, the fourth radio frame may include 5 subframes, and the uplink-downlink configuration of the fourth radio frame may be any of the configurations shown in FIG. 1 or other configurations, which will not be repeated here. .

Optionally, the first subframe of the fourth radio frame is a downlink subframe and the second subframe is a special subframe, and the network device may use the PDCCH in the first subframe or the second subframe of the fourth radio frame Or the EPDCCH carries fourth control information.

Optionally, the fourth control information is DCI carried in the PDCCH or the EPDCCH.

Optionally, the fourth control information includes a first information field, and the first information field includes K bits; when the value of K bits in the first information field is a first preset value , Used to instruct the network device to occupy the unlicensed spectrum in the fourth FFP, K is an integer greater than or equal to 0.

The first preset value is a predetermined value, which is not limited in the embodiments of the present application.

For example, K is 2, and the first preset value is 11. When the two bits in the first information field are 11, it can be used to instruct the network device to occupy the free in the fourth FFP Licensing spectrum.

Optionally, the fourth control information includes a second information field, and the second information field includes L bits; when the L bits in the second information field take a second preset value Is used to instruct the terminal device to perform uplink data transmission in the fourth FFP according to the third control information, and L is an integer greater than 0.

The second preset value has an association relationship with the value of M. The second preset value may be equal to M or other values that have a specific association relationship with the value of M, which is not limited in this embodiment of the present application. For example, as shown in FIG. 8, M is 1, L is 3, and the second preset value is 001. When the 3 bits in the first information field are 001, it can be used to indicate that the network device is The unlicensed spectrum is occupied in the fourth FFP.

Optionally, when the value of L bits in the second information field is the second preset value, it may also be used to indicate that the network device is not occupied in the M FFPs before the fourth FFP The unlicensed spectrum.

Step 703: The terminal device receives the third control information from the network device through the unlicensed spectrum in the third FFP.

The third control information is used to schedule the terminal device to perform uplink data transmission.

Step 704: When the terminal device is in the fourth FFP and receives fourth control information from the network device through the unlicensed spectrum, then uplink data transmission is performed in the fourth FFP according to the third control information.

Optionally, in the fourth FFP, the terminal device may send a candidate position of the PDCCH or EPDCCH in the network device, and perform CRC on the data information carried in the candidate position according to at least one preset RNTI Verification; when the terminal device successfully verifies the CRC and the K bits acquired from the preset position of the data information carried in the candidate position are the first preset value, the candidate position is determined The data information carried in includes the fourth control information, wherein the preset position is the position of the first information field in the fourth control information. Correspondingly, if the terminal device determines that the value of the K bits at the preset position is not the first preset value, it may determine that the fourth control information is not received in the fourth FFP. Optionally, when the terminal device determines that the network device has not sent the fourth control information in the fourth FFP, the terminal device continues to monitor whether the network device sends the fourth control information in another FFP.

Through the above method, in the unlicensed spectrum, especially in the FBE mode unlicensed spectrum, the uplink subframe in which the third control information sent by the network device and the terminal device scheduled by the third control information perform uplink data transmission is not In the same FFP, the terminal device can use the fourth control information to determine whether the network device occupies the unlicensed spectrum in the fourth FFP. At this time, the probability of false alarm is very small. At this time, the uplink data transmission of the terminal device will not be the same. The collision of the uplink data transmission of other terminal equipment improves the efficiency of data transmission in the unlicensed spectrum. Since the third control information cannot take effect alone, the FFP must be indicated by the fourth control information, so when the terminal device performs uplink data transmission according to the third control information, the network device must be occupied without authorization Within the FFP of the spectrum, the uplink data of the terminal device will not collide with the uplink data of other terminal devices, which improves the efficiency of data transmission in the unlicensed spectrum.

As shown in FIG. 9, it provides a schematic structural diagram of a terminal device according to an embodiment of the present application. The terminal device may be used to perform the actions of the terminal device in the foregoing method embodiments. The terminal device 900 includes: a transceiver unit 901 and a processing unit 902.

When the terminal device 900 executes the actions of the terminal device in the flow shown in FIG. 4, the transceiver unit 901 and the processing unit 902 respectively perform the following steps:

The transceiver unit 901 is configured to receive first control information from a network device within a first fixed frame period FFP; the first control information is used to schedule a terminal device to perform uplink data transmission within a second FFP; The second FFP is located after the first FFP, and there are N FFPs separated from the first FFP, and N is an integer greater than or equal to 0.

Optionally, the value of N may be a fixed value.

Optionally, the value of N may be a non-fixed value. In this case, the S FFPs after the first FFP are all candidate second FFPs, where S is an integer greater than 0; Sequentially try to receive the second control information for the Zth FFP after the first FFP, where Z is a positive integer less than or equal to S; when the terminal device detects the second control information for the Zth FFP after the first FFP At the time, the N value is determined as Z-1; when the terminal device does not receive the second control information in the S FFPs after the first FFP, the N value is determined as S-1.

The processing unit 902 is configured to, when receiving that the network device sends second control information in the second FFP, perform uplink data transmission according to the first control information in the second FFP.

In an optional implementation manner, the processing unit 902 is further configured to:

When it is determined that the network device does not send the second control information in the second FFP, the first control information is ignored.

In an optional implementation manner, the processing unit 902 is specifically configured to:

In the second FFP, in the candidate location where the network device sends a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH, the data carried in the candidate location according to the preset at least one wireless network temporary identifier RNTI CRC verification of information;

When the verification of the CRC is successful, receiving the data information carrying the second control information; when the processing unit 902 uses all preset RNTIs to perform CRC verification of the candidate positions of all the PDCCHs or EPDCCHs When successful, it is determined that the network device has not sent the second control information in the second FFP.

In the second FFP, it is detected whether a downlink signal sent by the network device, such as a cell-specific reference signal. When the detection result considers that the network device has sent a downlink signal, at the candidate position where the network device sends the PDCCH or EPDCCH, the CRC of the data information carried in the candidate position is verified according to at least one preset RNTI; when the processing When the unit 902 verifies the CRC successfully, it may receive the second control information carried in the data information.

Correspondingly, when the detection result of the processing unit 902 considers that the network device has not sent the downlink signal, it can be determined that the network device has not sent the second control information; correspondingly, when the detection result of the processing unit 902 believes that the network device has sent the downlink signal, but When the CRC verification of the candidate positions of all the PDCCHs or EPDCCHs by using all the preset RNTIs by the processing unit 902 is unsuccessful, it is determined that the network device has not sent the second control information in the second FFP.

In an optional implementation manner, the second control information is used to schedule the terminal device to perform uplink data transmission;

Or, the CRC of the second control information is scrambled by C-RNTI;

Or, the CRC of the second control information is scrambled by SI-RNTI;

Or, the CRC of the second control information is scrambled by P-RNTI;

Or, the CRC of the second control information is scrambled by RA-RNTI;

Or, the CRC of the second control information is scrambled by TC-RNTI;

Or, the CRC of the second control information is scrambled by SPS-C-RNTI;

Or, the CRC of the second control information is scrambled by TPC-PUCCH-RNTI;

Or, the CRC of the second control information is scrambled by TPC-PUSCH-RNTI;

In an optional embodiment, when the transceiver unit 902 does not receive the first control message of the first FFP, but successfully receives the second control message in the second FFP, and the second control message in the second FFP indicates When the terminal device performs uplink data transmission in an uplink subframe in the current FFP, if the uplink subframe is not the first uplink subframe in the current FFP, the transceiver unit 901 and the processing unit 902 may not perform the second control The uplink data transmission in the specific uplink subframe in the current FFP indicated by the message.

When the terminal device 900 executes the actions of the terminal device in the flow shown in FIG. 7, the transceiving unit 901 and the processing unit 902 respectively perform the following steps:

The transceiver unit 901 is configured to receive third control information from the network device through the unlicensed spectrum within the third fixed frame period FFP; the third control information is used to schedule the terminal device to perform uplink data transmission;

The processing unit 902 is configured to receive the fourth control information from the network device through the unlicensed spectrum in the fourth FFP, and perform uplink data transmission in the fourth FFP according to the third control information ;

Wherein, the fourth control information is used to instruct the network device to occupy the unlicensed spectrum in the fourth FFP, and to instruct the terminal device to send the third device in the third FFP according to the network device. Three control information, uplink data transmission is performed in the fourth FFP, the third FFP is located before the fourth FFP, and is separated from the fourth FFP by M FFPs, M is greater than or equal to An integer of 0.

In the fourth FFP, at a candidate position where the network device sends a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH, the CRC of the data information carried in the candidate position is verified according to at least one preset RNTI; When the verification of the CRC is successful, and the K bits acquired from the preset position of the data information carried in the candidate position are the first preset value, it is determined that the data information carried in the candidate position The fourth control information is included.

As shown in FIG. 10, it provides a schematic structural diagram of a network device according to an embodiment of the present application. The network device may be used to perform the actions of the network device in the foregoing method embodiments. The network device 1000 includes: a transceiver unit 1001 and a processing unit 1002.

When the network device 1000 executes the actions of the network device in the flow shown in FIG. 4, the transceiver unit 1001 and the processing unit 1002 perform the following steps:

The processing unit 1002 is configured to generate first control information;

The transceiver unit 1001 is configured to send first control information to the terminal device within the first frame period FFP; the first control information is used to schedule the terminal device to perform uplink data transmission within the second FFP; The second FFP is located after the first FFP, and there are N FFPs spaced between the second FFP and the first FFP, where N is an integer greater than or equal to 0; Send second control information.

Optionally, the value of N may be a fixed value.

Or, the CRC of the second control information is scrambled by C-RNTI;

Or, the CRC of the second control information is scrambled by SI-RNTI;

Or, the CRC of the second control information is scrambled by P-RNTI;

Or, the CRC of the second control information is scrambled by RA-RNTI;

Or, the CRC of the second control information is scrambled by TC-RNTI;

Or, the CRC of the second control information is scrambled by SPS-C-RNTI;

Or, the CRC of the second control information is scrambled by TPC-PUCCH-RNTI;

Or, the CRC of the second control information is scrambled by TPC-PUSCH-RNTI;

When the network device 1000 executes the actions of the network device in the flow shown in FIG. 7, the transceiver unit 1001 and the processing unit 1002 perform the following steps:

The processing unit 1002 is configured to determine to occupy the unlicensed spectrum within the fourth fixed frame period FFP;

The transceiver unit 1001 is configured to send fourth control information to the terminal device through the unlicensed spectrum in the fourth FFP; the fourth control information is used to instruct the network device to occupy the fourth FFP The unlicensed spectrum, and used to instruct the terminal device to perform uplink data transmission in the fourth FFP according to the third control information sent by the network device in the third FFP, where the third FFP is located Before the fourth FFP, and separated from the fourth FFP by M FFPs, M is an integer greater than or equal to 0.

In an optional implementation manner, the transceiver unit 1001 is further used to:

In the third FFP, the third control information is sent to a terminal device; the third control information is used to schedule the terminal device to perform uplink data transmission.

11 is a schematic structural diagram of a terminal device according to an embodiment of the present application. The wireless terminal device shown in FIG. 11 may be a hardware circuit implementation manner of the terminal device shown in FIG. 9. For ease of explanation, FIG. 11 shows only the main components of the terminal device. As shown in FIG. 11, the terminal device 1100 includes a processor 1101, a memory 1102, a transceiver 1103, an antenna 1104, and a display screen 1105 coupled to the memory 1102. The processor 1101 is mainly used to process communication protocols and communication data, and control the entire wireless terminal device, execute a software program, and process data of the software program, for example, to support the terminal device to perform the actions described in the above method embodiments . The memory 1102 is mainly used to store software programs and data. The transceiver 1103 is mainly used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals. The antenna 1104 is mainly used to cooperate with the transceiver 1103 to receive and transmit radio frequency signals in the form of electromagnetic waves. The display screen 1105 is mainly used to receive instructions input by the user and display images and data to the user. The terminal device 1100 may further include other components, such as a speaker, etc., which will not be repeated here.

When the terminal device 1100 executes the actions of the terminal device in the flow shown in FIG. 4, the following steps may be performed:

The transceiver 1103 is configured to receive the first control information from the network device within the first fixed frame period FFP; the first control information is used to schedule the terminal device to perform uplink data transmission within the second FFP; The second FFP is located after the first FFP, and there are N FFPs separated from the first FFP, and N is an integer greater than or equal to 0;

Optionally, the value of N may be a fixed value;

Optionally, the first control information is located in a PDCCH or ePDCCH of a downlink subframe or a special subframe whose subframe number is n in the first FFP, and the first control information is used to schedule the terminal device in a subframe Data transmission is performed on the uplink subframe with the number (n+N×V+k), and the uplink subframe with the subframe number (n+N×V+k) is located in the second FFP, where V represents an FFP The number of subframes included in, optional, V value is 5; k can be a value between the downlink control information scheduling the uplink data transmission and the corresponding uplink data transmission in the existing TD-LTE and other communication systems Frame interval, optional, the value of k can be 4, 6, 7 etc.;

Optionally, the first control information is located in a PDCCH or ePDCCH of a downlink subframe or a special subframe whose subframe number is n in the first FFP, and the first control information is used to schedule the terminal device in a subframe Data transmission on the uplink subframe numbered n+k; when the terminal device receives the first control information and receives that the network device sends the second control information in the second FFP, the terminal device Data transmission is performed on the uplink subframe whose subframe number is (n+N×V+k), where V represents the number of subframes included in an FFP, optional, V takes a value of 5; k can take a value It is the subframe interval between the downlink control information for scheduling uplink data transmission and the corresponding uplink data transmission in the existing TD-LTE communication system. Optionally, the value of k may be 4, 6, 7 etc.;

The processor 1101 is configured to perform uplink data transmission according to the first control information in the second FFP when receiving that the network device sends second control information in the second FFP.

In an optional implementation manner, the processor 1101 is further used to:

In an optional embodiment, the processor 1101 is specifically used to:

In the second FFP, in the candidate location where the network device sends a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH, the data carried in the candidate location according to the preset at least one wireless network temporary identifier RNTI The CRC of the information is verified. The at least one wireless network temporary identifier RNTI may be C-RNTI, SI-RNTI, P-RNTI, RA-RNTI, TC-RNTI, SPS-C-RNTI, TPC-PUCCH-RNTI, TPC -One or more of PUSCH-RNTI and M-RNTI;

When the verification of the CRC is successful, receiving the data information carrying the second control information; when the processor 1101 uses all preset RNTIs to perform CRC verification of all candidate positions of the PDCCH or EPDCCH When successful, it is determined that the network device has not sent the second control information in the second FFP.

In an optional embodiment, the processor 1101 is specifically used to:

In the second FFP, it is detected whether a downlink signal sent by the network device, such as a cell-specific reference signal. When the detection result considers that the network device has sent a downlink reference signal, at the candidate position of the PDCCH or EPDCCH sent by the network device, the CRC of the data information carried in the candidate position is verified according to at least one preset RNTI; when the When the processor 1101 verifies the CRC successfully, it may receive that the data information carries the second control information; when the detection result of the processor 1101 considers that the network device sends a downlink signal, but the processor 1101 uses the pre When all RNTIs assume that the CRC verification of the candidate positions of all PDCCHs or EPDCCHs is unsuccessful, it is determined that the network device has not transmitted the second control information in the second FFP. .

Correspondingly, when the detection result of the processor 1101 considers that the network device has not sent the downlink reference signal, it may be determined that the network device has not sent the second control information.

Or, the CRC of the second control information is scrambled by C-RNTI;

Or, the CRC of the second control information is scrambled by SI-RNTI;

Or, the CRC of the second control information is scrambled by P-RNTI;

Or, the CRC of the second control information is scrambled by RA-RNTI;

Or, the CRC of the second control information is scrambled by TC-RNTI;

Or, the CRC of the second control information is scrambled by SPS-C-RNTI;

Or, the CRC of the second control information is scrambled by TPC-PUCCH-RNTI;

Or, the CRC of the second control information is scrambled by TPC-PUSCH-RNTI;

In an optional implementation manner, the processor 1101 and the transceiver 1103 are specifically used for:

When the transceiver 1103 does not receive the first control message of the first FFP, but successfully receives the second control message in the second FFP, and the second control message in the second FFP indicates that the terminal device is within a certain current FFP When the uplink subframe performs uplink data transmission, if the uplink subframe is not the first uplink subframe in the current FFP, the processor 1101 and the transceiver 1103 may not execute the specific uplink subframe in the current FFP indicated by the second control message Upstream data transmission in the frame.

When the terminal device 1100 executes the actions of the terminal device in the flow shown in FIG. 7, it may perform the following steps respectively:

The transceiver 1103 is configured to receive the third control information from the network device through the unlicensed spectrum within the third fixed frame period FFP; the third control information is used to schedule the terminal device to perform uplink data transmission;

The processor 1101 is configured to receive fourth control information from a network device through the unlicensed spectrum in the fourth FFP, and perform uplink data transmission in the fourth FFP according to the third control information ;

In an optional embodiment, the processor 1101 is specifically used to:

In the fourth FFP, at a candidate position where the network device sends a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH, the candidate is selected according to at least one preset radio network temporary identity (RNTI). Verify the cyclic redundancy check (CRC) of the data information carried in the location; when the CRC verification is successful, and K bits obtained from the preset position of the data information carried in the candidate location If the value is the first preset value, it is determined that the data information carried in the candidate location includes the fourth control information.

As shown in FIG. 12, it is a schematic structural diagram of a network device according to an embodiment of the present application. The network device may be used to perform the actions of the network device in the foregoing method embodiments. The network device shown in FIG. 12 may be a hardware circuit implementation of the network device shown in FIG. For ease of explanation, FIG. 12 shows only the main components of the communication device. Optionally, the communication device may be a network device, or a device in the network device, such as a chip or a chip system, wherein the chip system includes at least one chip, and the chip system may further include other circuit structures and/or Discrete devices. Optionally, taking the communication device as a network device as an example, as shown in FIG. 12, the network device 1200 includes a processor 1201, a memory 1202, a communication module 1203, an antenna 1204, and so on.

When the network device 1200 executes the actions of the network device in the process shown in FIG. 4, the following steps may be performed respectively:

The processor 1201 is configured to generate first control information;

The communication module 1203 is configured to send first control information to the terminal device within the first frame period FFP; the first control information is used to schedule the terminal device to perform uplink data transmission within the second FFP; The second FFP is located after the first FFP, and there are N FFPs spaced between the second FFP and the first FFP, where N is an integer greater than or equal to 0; Send second control information;

Optionally, the value of N may be a fixed value;

Optionally, the first control information is located in a PDCCH or ePDCCH of a downlink subframe or a special subframe whose subframe number is n in the first FFP, and the first control information is used to schedule the terminal device in a subframe Data transmission on the uplink subframe numbered n+k; when the terminal device receives the first control information and receives that the network device sends the second control information in the second FFP, the terminal device Data transmission is performed on the uplink subframe with the subframe number (n+N×V+k), where V represents the number of subframes contained in an FFP, optionally, V takes a value of 5; k can take a value For the subframe interval between the downlink control information scheduling uplink data transmission and the corresponding uplink data transmission in the existing TD-LTE communication system, optionally, the value of k may be 4, 6, 7 and so on.

Or, the CRC of the second control information is scrambled by C-RNTI;

Or, the CRC of the second control information is scrambled by SI-RNTI;

Or, the CRC of the second control information is scrambled by P-RNTI;

Or, the CRC of the second control information is scrambled by RA-RNTI;

Or, the CRC of the second control information is scrambled by TC-RNTI;

Or, the CRC of the second control information is scrambled by SPS-C-RNTI;

Or, the CRC of the second control information is scrambled by TPC-PUCCH-RNTI;

Or, the CRC of the second control information is scrambled by TPC-PUSCH-RNTI;

When the network device 1200 performs the actions of the network device in the process shown in FIG. 7, it can perform the following steps respectively:

The processor 1201 is configured to determine to occupy the unlicensed spectrum within the fourth fixed frame period FFP;

The communication module 1203 is configured to send fourth control information to the terminal device through the unlicensed spectrum in the fourth FFP; the fourth control information is used to instruct the network device to occupy the fourth FFP The unlicensed spectrum, and used to instruct the terminal device to perform uplink data transmission in the fourth FFP according to the third control information sent by the network device in the third FFP, where the third FFP is located Before the fourth FFP, and separated from the fourth FFP by M FFPs, M is an integer greater than or equal to 0.

In an optional implementation manner, the communication module 1203 is further used to:

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, optical storage, etc.) containing computer usable program code.

This application is described with reference to flowcharts and/or block diagrams of the method, device (system), and computer program product according to this application. It should be understood that each flow and/or block in the flowchart and/or block diagram and a combination of the flow and/or block in the flowchart and/or block diagram may be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, special-purpose computer, embedded processing machine, or other programmable data processing device to produce a machine that enables the generation of instructions executed by the processor of the computer or other programmable data processing device An apparatus for realizing the functions specified in one block or multiple blocks of one flow or multiple flows of a flowchart and/or one block or multiple blocks of a block diagram.

Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of this application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A data transmission method, characterized in that it includes:

In the first fixed frame period FFP, the terminal device receives the first control information from the network device; the first control information is used to schedule the terminal device to perform uplink data transmission in the second FFP; the second FFP is located after the first FFP, and N FFPs are spaced between the second FFP and the first FFP, where N is an integer greater than or equal to 0;

When the terminal device receives that the network device sends second control information in the second FFP, in the second FFP, uplink data transmission is performed according to the first control information.
The method according to claim 1, wherein the method further comprises:

When the terminal device determines that the network device has not sent the second control information in the second FFP, the first control information is ignored.
The method according to claim 1 or 2, wherein the terminal device receiving the second control information sent by the network device in the second FFP includes:

In the second FFP, the terminal device sends a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH candidate position to the network device, and the candidate position is determined according to at least one wireless network temporary identifier RNTI preset Cyclic redundancy check CRC of the data information carried in the verification, the at least one wireless network temporary identifier RNTI is C-RNTI, SI-RNTI, P-RNTI, RA-RNTI, TC-RNTI, SPS-C-RNTI One or more of TPC-PUCCH-RNTI, TPC-PUSCH-RNTI, and M-RNTI; when the terminal device successfully verifies the CRC, receiving the data information carrying the second control information.
The method according to any one of claims 1 to 3, wherein the second control information is used to schedule the terminal device to perform uplink data transmission;

Or, the second control information is used to schedule the terminal device to receive downlink data;

Or, the second control information is used to instruct the terminal device to perform uplink transmission power adjustment;

Or, the second control information shown is used to instruct the terminal device to receive system broadcast information;

Or, the second control information is used to instruct the terminal device to receive paging information;

Or, the CRC of the second control information is scrambled by C-RNTI;

Or, the CRC of the second control information is scrambled by SI-RNTI;

Or, the CRC of the second control information is scrambled by P-RNTI;

Or, the CRC of the second control information is scrambled by RA-RNTI;

Or, the CRC of the second control information is scrambled by TC-RNTI;

Or, the CRC of the second control information is scrambled by SPS-C-RNTI;

Or, the CRC of the second control information is scrambled by TPC-PUCCH-RNTI;

Or, the CRC of the second control information is scrambled by TPC-PUSCH-RNTI;

Alternatively, the CRC of the second control information is scrambled by M-RNTI.
A data transmission method, characterized in that it includes:

The network device sends first control information to the terminal device within the first frame period FFP; the first control information is used to schedule the terminal device to perform uplink data transmission within the second FFP; the second FFP is located After the first FFP, and between the second FFP and the first FFP, there are N FFPs, where N is an integer greater than or equal to 0;

The network device sends second control information to the terminal device in the second FFP.
The method according to claim 5, wherein the second control information is used to schedule the terminal device to perform uplink data transmission;

Or, the second control information is used to schedule the terminal device to receive downlink data;

Or, the second control information is used to instruct the terminal device to perform uplink transmission power adjustment;

Or, the second control information shown is used to instruct the terminal device to receive system broadcast information;

Or, the second control information is used to instruct the terminal device to receive paging information;

Or, the CRC of the second control information is scrambled by C-RNTI;

Or, the CRC of the second control information is scrambled by SI-RNTI;

Or, the CRC of the second control information is scrambled by P-RNTI;

Or, the CRC of the second control information is scrambled by RA-RNTI;

Or, the CRC of the second control information is scrambled by TC-RNTI;

Or, the CRC of the second control information is scrambled by SPS-C-RNTI;

Or, the CRC of the second control information is scrambled by TPC-PUCCH-RNTI;

Or, the CRC of the second control information is scrambled by TPC-PUSCH-RNTI;

Alternatively, the CRC of the second control information is scrambled by M-RNTI.
A data transmission method, characterized in that it includes:

The network equipment determines to occupy the unlicensed spectrum within the fourth fixed frame period FFP;

The network device sends fourth control information to the terminal device through the unlicensed spectrum in the fourth FFP; the fourth control information is used to instruct the network device to occupy the exemption in the fourth FFP Authorized spectrum, and used to instruct the terminal device to perform uplink data transmission in the fourth FFP according to the third control information sent by the network device in the third FFP, where the third FFP is located in the Before the fourth FFP, and separated from the fourth FFP by M FFPs, M is an integer greater than or equal to 0.
The method according to claim 7, wherein before the network device determines to occupy the unlicensed spectrum in the fourth FFP, the method further comprises:

The network device sends the third control information to the terminal device within the third FFP; the third control information is used to schedule the terminal device to perform uplink data transmission.
The method according to claim 7 or 8, wherein the fourth control information includes a first information field, and the first information field includes K bits; when K in the first information field When the bit value is the first preset value, it is used to instruct the network device to occupy the unlicensed spectrum in the fourth FFP, and K is an integer greater than or equal to 0.
The method according to claim 7 or 8 or 9, wherein the fourth control information includes a second information field, and the second information field includes L bits; when the second information field When the value of L bits is the second preset value, it is used to instruct the terminal device to perform uplink data transmission in the fourth FFP according to the third control information, and L is an integer greater than 0.
A data transmission method, characterized in that it includes:

The terminal device receives the third control information from the network device through the unlicensed spectrum within the third fixed frame period FFP; the third control information is used to schedule the terminal device for uplink data transmission;

When the terminal device is in the fourth FFP and receives the fourth control information from the network device through the unlicensed spectrum, uplink data transmission is performed in the fourth FFP according to the third control information;

Wherein, the fourth control information is used to instruct the network device to occupy the unlicensed spectrum in the fourth FFP, and to instruct the terminal device to send the third device in the third FFP according to the network device. Three control information, uplink data transmission is performed in the fourth FFP, the third FFP is located before the fourth FFP, and is separated from the fourth FFP by M FFPs, M is greater than or equal to An integer of 0.
The method according to claim 11, wherein the fourth control information includes a first information field, and the first information field includes K bits; when K bits in the first information field are taken When the value is the first preset value, it is used to instruct the network device to occupy the unlicensed spectrum in the fourth FFP, and K is an integer greater than or equal to 0.
The method according to claim 12, wherein the terminal device receives fourth control information from the network device through the unlicensed spectrum within a fourth fixed frame period FFP, including:

In the fourth FFP, the terminal device sends a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH candidate position to the network device, and the candidate position is determined according to at least one wireless network temporary identifier RNTI preset Cyclic redundancy check CRC of the data information carried in the verification;

When the terminal device successfully verifies the CRC, and the K bits acquired from the preset position of the data information carried in the candidate position are the first preset value, it is determined that the candidate position carries The data information includes the fourth control information.
The method according to any one of claims 11 to 13, wherein the fourth control information includes a second information field, and the second information field includes L bits; when the second information field When the value of L bits is the second preset value, it is used to instruct the terminal device to perform uplink data transmission in the fourth FFP according to the third control information, and L is an integer greater than 0.
A terminal device is characterized by comprising:

The transceiver unit is used to receive the first control information from the network device within the first fixed frame period FFP; the first control information is used to schedule the terminal device to perform uplink data transmission in the second FFP; the first Two FFPs are located after the first FFP, and there are N FFPs between the second FFP and the first FFP, where N is an integer greater than or equal to 0;

The processing unit is configured to, when it is determined that the network device sends second control information in the second FFP, perform uplink data transmission according to the first control information in the second FFP.
The terminal device according to claim 15, wherein the processing unit is further configured to:

When it is determined that the network device does not send the second control information in the second FFP, the first control information is ignored.
The terminal device according to claim 15 or 16, wherein the processing unit is specifically configured to:

In the second FFP, in a candidate location where the network device sends a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH, according to a preset at least one wireless network temporary identifier RNTI, data carried in the candidate location The cyclic redundancy check CRC of the information is verified, and the at least one wireless network temporary identifier RNTI is C-RNTI, SI-RNTI, P-RNTI, RA-RNTI, TC-RNTI, SPS-C-RNTI, TPC-PUCCH -One or more of RNTI, TPC-PUSCH-RNTI, M-RNTI;

When the verification of the CRC is successful, it is determined that the data information carries the second control information.
The terminal device according to any one of claims 15 to 17, wherein the second control information is used to schedule the terminal device to perform uplink data transmission;

Or, the second control information is used to schedule the terminal device to receive downlink data;

Or, the second control information is used to instruct the terminal device to perform uplink transmission power adjustment;

Or, the second control information shown is used to instruct the terminal device to receive system broadcast information;

Or, the second control information is used to instruct the terminal device to receive paging information;

Or, the CRC of the second control information is scrambled by C-RNTI;

Or, the CRC of the second control information is scrambled by SI-RNTI;

Or, the CRC of the second control information is scrambled by P-RNTI;

Or, the CRC of the second control information is scrambled by RA-RNTI;

Or, the CRC of the second control information is scrambled by TC-RNTI;

Or, the CRC of the second control information is scrambled by SPS-C-RNTI;

Or, the CRC of the second control information is scrambled by TPC-PUCCH-RNTI;

Or, the CRC of the second control information is scrambled by TPC-PUSCH-RNTI;

Alternatively, the CRC of the second control information is scrambled by M-RNTI.
A network device, characterized in that it includes:

A processing unit, configured to generate first control information;

The transceiver unit is used to send the first control information to the terminal device within the first frame period FFP; the first control information is used to schedule the terminal device to perform uplink data transmission in the second FFP; the first Two FFPs are located after the first FFP, and there are N FFPs between the second FFP and the first FFP, N is an integer greater than or equal to 0; sent to the terminal device within the second FFP Second control information.
The network device according to claim 19, wherein the second control information is used to schedule the terminal device to perform uplink data transmission;

Or, the second control information is used to schedule the terminal device to receive downlink data;

Or, the second control information is used to instruct the terminal device to perform uplink transmission power adjustment;

Or, the second control information shown is used to instruct the terminal device to receive system broadcast information;

Or, the second control information is used to instruct the terminal device to receive paging information;

Or, the CRC of the second control information is scrambled by C-RNTI;

Or, the CRC of the second control information is scrambled by SI-RNTI;

Or, the CRC of the second control information is scrambled by P-RNTI;

Or, the CRC of the second control information is scrambled by RA-RNTI;

Or, the CRC of the second control information is scrambled by TC-RNTI;

Or, the CRC of the second control information is scrambled by SPS-C-RNTI;

Or, the CRC of the second control information is scrambled by TPC-PUCCH-RNTI;

Or, the CRC of the second control information is scrambled by TPC-PUSCH-RNTI;

Alternatively, the CRC of the second control information is scrambled by M-RNTI.
A network device, characterized in that it includes:

The processing unit is used to determine that the unlicensed spectrum is occupied within the fourth fixed frame period FFP;

A transceiver unit, configured to send fourth control information to a terminal device through the unlicensed spectrum in the fourth FFP; the fourth control information is used to instruct the network device to occupy the fourth FFP Unlicensed spectrum, and used to instruct the terminal device to perform uplink data transmission in the fourth FFP according to the third control information sent by the network device in the third FFP, the third FFP is located in the Before the fourth FFP, and spaced apart from the fourth FFP by M FFPs, M is an integer greater than or equal to 0.
The network device according to claim 21, wherein the transceiver unit is further configured to:

In the third FFP, the third control information is sent to a terminal device; the third control information is used to schedule the terminal device to perform uplink data transmission.
The network device according to claim 21 or 22, wherein the fourth control information includes a first information field, and the first information field includes K bits; when K in the first information field When the value of each bit is the first preset value, it is used to instruct the network device to occupy the unlicensed spectrum in the fourth FFP, and K is an integer greater than or equal to 0.
The network device according to claim 21, 22 or 23, wherein the fourth control information includes a second information field, and the second information field includes L bits; when the second information field When the value of L bits is the second preset value, it is used to instruct the terminal device to perform uplink data transmission in the fourth FFP according to the third control information, and L is an integer greater than 0 .
A terminal device is characterized by comprising:

The transceiver unit is used to receive the third control information from the network device through the unlicensed spectrum within the third fixed frame period FFP; the third control information is used to schedule the terminal device to perform uplink data transmission;

The processing unit is configured to receive the fourth control information from the network device through the unlicensed spectrum in the fourth FFP, and perform uplink data transmission in the fourth FFP according to the third control information;

Wherein, the fourth control information is used to instruct the network device to occupy the unlicensed spectrum in the fourth FFP, and to instruct the terminal device to send the third device in the third FFP according to the network device. Three control information, uplink data transmission is performed in the fourth FFP, the third FFP is located before the fourth FFP, and is separated from the fourth FFP by M FFPs, M is greater than or equal to An integer of 0.
The terminal device according to claim 25, wherein the fourth control information includes a first information field, and the first information field includes K bits; when K bits in the first information field When the value is the first preset value, it is used to instruct the network device to occupy the unlicensed spectrum in the fourth FFP, and K is an integer greater than or equal to 0.
The terminal device according to claim 25, wherein the processing unit is specifically configured to:

In the fourth FFP, in a candidate position where the network device sends a physical downlink control channel PDCCH or an enhanced physical downlink control channel EPDCCH, according to at least one preset wireless network temporary identifier RNTI, data carried in the candidate position Cyclic redundancy check CRC of information to verify;

When the verification of the CRC is successful, and the K bits acquired from the preset position of the data information carried in the candidate position are the first preset value, it is determined that the data information carried in the candidate position The fourth control information is included.
The terminal device according to claim 25, wherein the transceiver unit and the processing unit are specifically configured to:

The transceiver unit receives a second information field in the fourth control information, and the second information field includes L bits; when the processing unit determines that the L bits in the second information field are When two preset values are used, the transceiver unit performs uplink data transmission in the fourth FFP according to the third control information, and L is an integer greater than 0.
A data transmission device, comprising: a memory and a processor, the memory is used to store instructions, the processor is used to execute the instructions stored in the memory, and the execution of the instructions stored in the memory causes The processor is used to execute the method according to any one of claims 1 to 14.
A computer-readable storage medium, characterized in that it includes computer-readable instructions, and when the data transmission device reads and executes the computer-readable instructions, causes the data transmission device to execute any one of claims 1 to 14. Item.