WO2020133340A1

WO2020133340A1 - Data transmission method and communication device

Info

Publication number: WO2020133340A1
Application number: PCT/CN2018/125313
Authority: WO
Inventors: 王俊伟
Original assignee: 华为技术有限公司
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2020-07-02
Also published as: CN111771410A; CN111771410B

Abstract

A data transmission method and a communication device. The method comprises: a first communication device determining an end time of first data and a start time of second data, a time period obtained by subtracting the end time of the first data from the start time of the second data being a first receiving and transmitting interval, the first data being transmitted by a second communication device, and the second data being data to be transmitted by the first communication device; the first communication device determining the transmission time of third data according to a start time and an advance amount of the second data, the advance amount being determined according to time unit information for transmitting the first data, the third data being data filled in at a front end of the second data by the first communication device, a time period obtained by subtracting the end time of the first data from the transmission time of the third data being a second receiving and transmitting interval, and the second receiving and transmitting interval being smaller than the first receiving and transmitting interval; and the first communication device transmitting the third data to the second communication device at the transmission time of the third data, and then transmitting the second data to the second communication device at the start time of the second data.

Description

Data transmission method and communication equipment

Technical field

The embodiments of the present application relate to the communication field, and in particular, to a data transmission method and a communication device.

Background technique

With the development of mobile broadband (MBB) services, users are increasingly demanding wireless network bandwidth and throughput. In order to make better use of unlicensed spectrum resources and provide end users with higher service rates and better user experience, long-term evolution (LTE) systems and new radio (NR) systems have been introduced Access technology based on unlicensed spectrum.

Compared with the exclusive characteristics of licensed spectrum, unlicensed spectrum has a shared nature, that is, as long as access nodes that meet certain regulations can use the spectrum to receive and send data, the access node can include: base stations and User equipment (user equipment, UE). In order to achieve better coexistence of each access node, after introducing unlicensed spectrum in the LTE system and NR system, a listen before talk (LBT) mechanism is adopted, which means that any access node needs to send data before sending it. To monitor the channel to be sent, only when the channel is idle can data be sent, otherwise it is necessary to continue monitoring.

After the current LBT is successful, the base station obtains a channel occupation time (COT), which can send downlink data from the base station to the terminal within this time period, and can also send instructions to the UE so that the UE can use the time corresponding to the COT Frequency resources to send uplink data. Although the base station can notify the UE of the obtained time-frequency resources corresponding to the COT, there is a gap time between the UE receiving the notification signaling and the UE transmitting the uplink data.

During the above interval, it belongs to the signal blank period, that is, neither the base station nor the UE sends a signal. If the length of the interval is set too large, the risk of losing the channel is increased, which results in insufficient stability of the system communication and reduces the predictability of data scheduling. In addition, in the interval time, it is also possible that other neighboring cells or sending nodes of different systems obtain the right to send data and send signals on the same channel, which will also cause mutual interference to upstream signals.

Summary of the invention

Embodiments of the present application provide a data transmission method and a communication device, which are used to reduce the length of an interval time, reduce the risk of losing a channel, and reduce possible channel interference.

To solve the above technical problems, the embodiments of the present application provide the following technical solutions:

In a first aspect, an embodiment of the present application provides a data transmission method, including: a first communication device determines an end time of first data and a start time of second data, and the start time of the second data minus the The time period obtained at the end of the first data is the first sending and receiving interval, the first data is sent by the second communication device, and the second data is the data to be sent by the first communication device; the first communication The device determines the sending time of the third data according to the start time and the advance amount of the second data, where the advance amount is determined according to the time unit information for transmitting the first data, and the third data is the first A communication device fills the data at the front end of the second data, and the time period obtained by subtracting the end time of the first data from the sending moment of the third data is the second sending and receiving interval, and the second sending and receiving interval Less than the first transceiver interval; the first communication device sends the third data to the second communication device at the sending time of the third data, and then sends the third data to the station at the starting time of the second data The second communication device sends the second data.

In the embodiment of the present application, the first communication device first determines the end time of the first data and the start time of the second data, and the time period obtained by subtracting the end time of the first data from the start time of the second data is the first Interval of receiving and sending, the first data is sent by the second communication device, the second data is the data to be sent by the first communication device, and the first communication device next determines the sending time of the third data according to the starting time and the advance of the second data The advance amount is determined according to the time unit information for transmitting the first data, the third data is the data filled by the first communication device at the front end of the second data, and the time period obtained by subtracting the end time of the first data from the sending time of the third data Is the second transceiving interval, and the second transceiving interval is smaller than the first transceiving interval, the first communication device sends the third data to the second communication device at the sending moment of the third data, and then sends the second data to the second at the starting moment of the second data The communication device sends the second data. In the embodiment of the present application, the sending time of the third data is determined based on the starting time and the advance of the second data, so that the third data is sent before the starting time of the second data, the second in the embodiment of the present application The sending and receiving interval is shorter than the first sending and receiving interval, that is, the interval between switching from receiving the first data to sending the third data is shorter than the switching from receiving the first data to sending the second data, which reduces the length of the uplink and downlink switching interval, So as to ensure the stability of system communication and the predictability of data scheduling.

In a possible implementation manner of the first aspect, the advancement amount is used to indicate the advancement time length of the transceiver switching in advance; the first communication device determines the end time of the first data and the start of the second data After the time, the method further includes: the first communication device determining the start time of switching of the transceiver according to the end time of the first data and the advance amount; Transceiver switching is performed at the starting moment of transceiver switching; when the transceiver switching is completed, the following steps are triggered to be executed: the first communication device sends the second communication to the second communication at the sending moment of the third data The device sends the third data, and then sends the second data to the second communication device at the beginning of the second data. The advance amount may be used to indicate the length of advance time for the switch of the transceiver in advance. After the first communication device obtains the advance amount, the transceiver is advanced in advance based on the advance amount based on the end time of the first data. For the handover, the starting time that is advanced on the basis of the end time of the first data is determined as the starting time for the switch of the transceiver. The first communication device performs transceiver switching at the starting moment of transceiver switching, that is, the embodiment of the application implements transceiver switching in advance relative to the prior art.

In a possible implementation manner of the first aspect, after the first communication device determines the end time of the first data and the start time of the second data, the method further includes: the first communication device according to the The first transceiver interval and the cyclic prefix CP length information of the last time unit transmitting the first data determine whether the first communication device satisfies the pre-transmit/receive switching condition. Wherein, in the embodiment of the present application, the first communication device may also preset a pre-transmit/receive switching condition, and the pre-transmit/receive switching condition is a judgment condition for whether the transceiver can be switched in advance. In the embodiment of the present invention, after setting the pre-transmit/receive switching condition, the first communication device obtains the first transceiving interval and the CP length information of the last time unit transmitting the first data, and determines the CP length according to the first transceiving interval Whether the pre-transmit and receive switching conditions are met. For example, the early transmission and reception switching condition may include a threshold. If the difference between the first transmission and reception interval minus the CP length is less than the threshold, it may be determined that the first communication device meets the early transmission and reception switching condition. If the first transmission and reception interval minus the CP length The obtained difference value is greater than or equal to the threshold value, and it can be determined that the first communication device does not satisfy the pre-transmit and receive switching condition.

In a possible implementation manner of the first aspect, the method further includes: when the first communication device satisfies the early transmit-receive switching condition, the first communication device transmits the first data according to the last The CP length information of the time unit determines the advance amount. Wherein, when the first communication device satisfies the pre-transmit/receive switching condition, the advancement amount can be determined according to the CP length of the last time unit transmitting the first data. For example, the first communication device can set the advancement amount d to d= CP length, or d=3/4CP length, or d=1/2 CP length. As long as the pre-transmit and receive switching conditions can be met, the first communication device may determine the relationship between the advance amount and the CP length according to specific scenarios.

In a possible implementation manner of the first aspect, the method further includes: the first communication device acquiring the subcarrier interval of the first data and the CP type information of the last time unit transmitting the first data The first communication device determines the CP length information of the last time unit transmitting the first data according to the subcarrier interval of the first data and the CP type information. The subcarrier interval of the first data acquired by the first communication device is a frequency value, and the CP type information of the last time unit acquired by the first communication device that transmits the first data may include: a conventional cyclic prefix and an extended cyclic Prefix, in which the regular cyclic prefix length is 4.7us, and the extended cyclic prefix length is 16.67us. The first communication device determines the CP length information of the last time unit transmitting the first data according to the subcarrier interval of the first data and the CP type information.

In a possible implementation manner of the first aspect, after the first communication device determines the end time of the first data and the start time of the second data, the method further includes: the first communication device according to the The first scheduling information configured by the second communication device determines a time unit that is not scheduled to the first communication device, and the first scheduling information is used to schedule the first data; the first communication device is The time unit of the first communication device determines the advancement. Before the second communication device sends the first data, the second communication device sends the first scheduling information to the first communication device, and the second communication device sends the first data to the first communication device according to the first scheduling information. The first communication device determines the time unit that is not scheduled to the first communication device according to the first scheduling information. The time unit that is not scheduled to the first communication device refers to that no longer communicates with the first communication at the end of the time unit transmitting the first data The time unit in which the device sends data, for example, no more data is sent to the first communication device at the end within the last symbol that sent the first data. The first communication device determines the advancement according to the time unit not scheduled to the first communication device, for example, the advancement in step 202 may not be greater than the time unit not scheduled to the first communication device, and the first communication device may advance according to the advancement Transceiver switching is performed, thereby reducing the length of the interval between uplink and downlink switching, thereby ensuring the stability of system communication and the predictability of data scheduling.

In a possible implementation manner of the first aspect, the time unit that is not scheduled to the first communication device includes at least one of the following time units: a time unit that does not schedule data to the first communication device, scheduling A time unit of data that the first communication device has received, and a time unit of scheduling data to other communication devices than the first communication device. Among them, the failure to schedule data to the first communication device refers to that the second communication device does not send data to the first communication device, and the time unit to schedule data that the first communication device has received refers to the time at which the first communication device repeatedly receives data unit. The time unit for scheduling data to communication devices other than the first communication device means that the time unit is not used for scheduling to the first communication device, but for scheduling data to other communication devices, the time unit is still unscheduled For the time unit of the first communication device, the time unit for scheduling data to other communication devices other than the first communication device may be used to determine the advance.

In a possible implementation manner of the first aspect, when the first data is transmitted through a single carrier or multiple synchronization carriers, the method further includes: the first communication device at the end time of the first data Perform transceiver switching; when the transceiver switching ends, the first communication device sends the third data to the second communications device at the end of the transceiver switching, and then sends the third data The second data is sent to the second communication device at the starting moment of the second data. The first communication device initiates the switching of the transceiver at the end of the first data. The end time of the switching of the transceiver is the sending time of the third data, and the first communication device sends the third data to the second communication device at the end of the switching of the transceiver, and then sends the third data to the second The communication device sends the second data. In this way, the transceiver interval can be reduced to the time of the RF transceiver hardware switching (such as 13us), which can be applied to the scenario of one carrier, or the scenario of multiple synchronized carriers, where multiple synchronized carriers can be under the same network standard system Carrier wave.

In a possible implementation manner of the first aspect, when the first data is transmitted through multiple non-synchronized carriers, the method further includes: the first communication device ends at the latest when transmitting the first data Transceiver switching is performed at all times; when the transceiver switching ends, the first communication device sends the third data to the second communications device at the end of the transceiver switching, and then Sending the second data to the second communication device at the starting moment of the second data. When there is an error in the downlink synchronization between multiple carriers, it is necessary to wait for the latest carrier to receive the first data before switching the transceiver. When the current system is on multiple carriers, especially when the first communication device cannot ensure the signal reception synchronization, it is necessary to wait for the time synchronization to complete the reception of the first data of the last carrier before it can start the RF transceiver conversion, and its lag time depends on the carrier Timing error. Using the transceiver switching in advance in the foregoing embodiments of the present application can better reduce the interval between uplink and downlink switching, reduce the risk of channel loss, and improve the efficiency of system data transmission.

In a possible implementation manner of the first aspect, the method further includes: the first communication device sends multi-carrier error information to the second communication device, and the multi-carrier error information is used to indicate multiple carriers The length of time between synchronization errors. The first communication device may also report the synchronization error between multiple carriers to the second communication device, for example, the first communication device sends multi-carrier error information, and the multi-carrier error information may include: the synchronization error of each carrier.

In a possible implementation manner of the first aspect, the method further includes: the first communication device sends radio frequency capability information to the second communication device, and the radio frequency capability information is used to indicate the first communication device The length of time to perform the switching of the transceiver, and for indicating whether the first communication device supports the switching of the transceiver in advance. In order to enable better scheduling and data transmission between the first communication device and the second communication device, the first communication device also needs to interact with the second communication device, and the first communication device sends radio frequency capability information to the second communication device The radio frequency capability information is used to indicate the length of time that the first communication device performs transceiver switching, and to indicate whether the first communication device supports transceiver switching in advance.

In a possible implementation manner of the first aspect, the method further includes: the first communication device receives second scheduling information sent by the second communication device, and the second scheduling information includes the following three parameters: At least one of: a first scheduling parameter, a second scheduling parameter, and a third scheduling parameter, where the first scheduling parameter is used to indicate the starting moment of the second data, and the second scheduling parameter is used to indicate the first Whether a communication device performs transceiver switching in advance, the third scheduling parameter is used to instruct the first communication device to listen first and then speak LBT parameters; the first communication device determines the The starting moment of the second data, and determining whether to switch the transceiver in advance according to the second scheduling parameter, and determining the LBT parameter according to the third scheduling parameter. In the embodiment of the present application, among the three scheduling parameters sent by the second communication device, the first scheduling parameter is used to indicate the starting time of the second data, for example, it may be a time slot or a symbol position, and the second scheduling parameter is used to indicate Whether the first communication device performs the method of shortening the interval time, if the value of the second scheduling parameter is 0, it indicates that the interval time is not executed, and if the value of the second scheduling parameter is 1, it indicates that the GAP reduction is executed. The third scheduling parameter can indicate the LBT access type. If the value of the third scheduling parameter is 00, it means that there is no LBT, that is, it is sent directly. If the value of the third scheduling parameter is 01, it means that it is LBTcat2, if the third scheduling parameter If the value is 10, it means to do LBT CAT4. If the third scheduling parameter is 11, it means reserved field.

In a possible implementation manner of the first aspect, the method further includes: the first communication device receives third scheduling information sent by the second communication device, and the third scheduling information is used to indicate that the The first communication device acquires the LBT parameter; the first communication device determines that the second communication device instructs the first communication device to acquire the LBT parameter; the first communication device according to the first transceiver interval or Acquiring the LBT parameter in the second sending and receiving interval. In the embodiment of the present application, when the second communication device sends the third scheduling message to the first communication device, the second communication device may set the type of LBT to that the first communication device obtains the LBT parameters by itself, that is, the second communication The device no longer indicates the specific LBT parameter to the first communication device, and the third scheduling information is used to indicate that the first communication device acquires the LBT parameter. After receiving the third scheduling information, the first communication device determines that the type of LBT is determined by the first communication device itself. The first communication device can calculate the uplink and downlink data transmission and reception intervals that can be achieved, and perform the corresponding LBT. For example, the transmission and reception interval that can be achieved is not greater than 16us, and the first communication device may directly transmit the uplink data at the scheduled time without performing LBT. For another example, when the transmission and reception interval can be greater than 16us and less than 25us, the first communication device may select LBTcat2. It should be noted that the transmission and reception interval that can be achieved here may be the time of the first transmission and reception interval determined by the first communication device, or the time of the second transmission and reception interval determined by the first communication device.

In a possible implementation manner of the first aspect, the sending time of the third data is later than the ending time of the first data. Among them, if the time after the first communication device performs the switching of the transceiver is earlier than the end time of the first data, in order to reduce the interference caused by the first communication device sending the third data to other users, it is necessary to control the sending of the third data The time cannot be earlier than the end time of the first data.

In a possible implementation manner of the first aspect, the method further includes: before the end time of the first data arrives, the first communication device controls the radio frequency transmission power to be less than or equal to a preset transmission power threshold. If the time after the first communication device performs the switching of the transceiver is earlier than the end time of the first data, in order to reduce the interference caused to the other users by the third communication device sending the third data, the first communication device is performing the transceiver After the machine is switched, the power of the transmitted signal needs to be controlled.

In a possible implementation manner of the first aspect, the first communication device determining the end time of the first data and the start time of the second data includes: the first communication device acquiring the configuration of the second communication device The first scheduling information and the fourth scheduling information, the first scheduling information is used to schedule the first data, the fourth scheduling information is used to schedule the second data; the first communication device according to the The time domain information of the first scheduling information indicates the end time of determining the first data; and, the first communication device determines the time according to the time domain information indication of the fourth scheduling information and preset timing advance information TA The starting moment of the second data. The second communication device sends first scheduling information and fourth scheduling information to the first communication device. The first scheduling information is used to schedule the first data, and the fourth scheduling information is used to schedule the second data. The first communication device first determines the time corresponding to the time slot (or symbol) boundary of the second communication device according to the synchronization signal, and the first scheduling information indicates the starting time slot (or symbol) occupied by the first data and the symbol occupied by the first data Number, the time domain information indication of the first scheduling information may include the time corresponding to the above-mentioned time slot (or symbol) boundary, the starting time slot (or symbol), and the number of symbols occupied by the data, according to the time domain information Indicate the end time for determining the first data. For example, the first communication device determines the end time S0 of the first data according to the time domain information indication of the first scheduling information, and the fourth scheduling information indicates the starting time slot (or symbol) occupied by the second data and the number of symbols occupied by the second data , Determine that the transmission time is t0 according to the fourth scheduling information, and then calculate the start time S1=t0-TA of the second data according to the preset timing advance information TA. The first transceiver interval = S1-S0.

In a possible implementation manner of the first aspect, the third data is a piece of data copied from the second data, or a random number, or a reference signal, and the length of the third data is equal to the advance the amount. The second data is uplink data to be sent, and a piece of data is copied from the second data as the third data, and the length of the third data is equal to the advancement. In order to reduce the problem of inter-symbol interference caused by channel multipath, a CP technology can be introduced into the communication system, that is, a CP header can be added to the first time unit for transmitting the second data. The CP header can be from the second A piece of data copied from the end of the data. For example, the third data is a piece of data copied from the second data. The copied third data can form a new CP with the original CP of the second data. The third data in the embodiment of the present application may be the third data. A piece of data located before the tail of the second data and adjacent to the tail data in the second data. In addition, in this embodiment of the present application, the reference signal can be sent before the second data is sent. By sending the reference signal, the receiver can increase the channel estimation resources, make the channel estimation result more accurate, and help improve the reception performance of the receiver. .

In a second aspect, an embodiment of the present application further provides a communication device. The communication device is specifically a first communication device. The first communication device includes: a processor, a memory, and a transmitter; the processor is used to determine The end time of the first data and the start time of the second data. The time period obtained by subtracting the end time of the first data from the start time of the second data is the first sending and receiving interval. Sent by a second communication device, where the second data is data to be sent by the first communication device; and the processor is further configured to determine the third data according to a start time and an advance amount of the second data Sending time, wherein the advance amount is determined according to the time unit information for transmitting the first data, the third data is the data that the first communication device fills in front of the second data, and the first The time period obtained by subtracting the end time of the first data from the sending time of the third data is the second sending and receiving interval, and the second sending and receiving interval is smaller than the first sending and receiving interval; the memory is used to store the transmission And the data and instructions of the processor; the transmitter is configured to send the third data to the second communication device at the moment of sending the third data, and then start at the beginning of the second data The second data is sent to the second communication device at the beginning.

In a possible implementation manner of the second aspect, the first communication device further includes: a radio frequency transceiver module, wherein the advance amount is used to indicate an advance time length for transceiver switching in advance; the processor , Which is also used to determine the start time of the switching of the transceiver according to the end time of the first data and the advance amount after determining the end time of the first data and the start time of the second data; the process It is also used to control the radio frequency transceiver module to switch the transceiver at the beginning of the transceiver switching; the processor is also used to control the transmission after the transceiver switching is completed The device sends the third data to the second communication device at the sending time of the third data, and then sends the second data to the second communication device at the starting time of the second data.

In a possible implementation manner of the second aspect, the processor is further configured to determine the end time of the first data and the start time of the second data, and transmit the first The cyclic prefix CP length information of the last time unit of the data determines whether the first communication device meets the pre-transmit and receive switching conditions.

In a possible implementation manner of the second aspect, the processor is further configured to, according to the CP of the last time unit transmitting the first data when the first communication device satisfies the early transmission/reception switching condition The length information determines the advance.

In a possible implementation manner of the second aspect, the processor is further configured to acquire the subcarrier interval of the first data and the CP type information of the last time unit transmitting the first data; according to the The subcarrier interval of the first data and the CP type information determine the CP length information of the last time unit transmitting the first data.

In a possible implementation manner of the second aspect, the processor is further configured to determine the first scheduling information configured by the second communication device after the end time of the first data and the start time of the second data Determining a time unit not scheduled to the first communication device, the first scheduling information is used to schedule the first data; and determining the advance amount according to a time unit not scheduled to the first communication device.

In a possible implementation manner of the second aspect, the time unit not scheduled to the first communication device stored in the memory includes at least one of the following time units: no data is scheduled to the first communication device The time unit of time, the time unit of scheduling data that the first communication device has received, and the time unit of scheduling data to other communication devices other than the first communication device.

In a possible implementation manner of the second aspect, the first communication device further includes: a radio frequency transceiver module, wherein the processor is further used when the first data passes through a single carrier or multiple synchronization carriers During transmission, the radio frequency transceiver module is controlled to switch the transceiver at the end time of the first data; when the transceiver switch ends, the transmitter is controlled at the end time of the transceiver switch The second communication device sends the third data, and then sends the second data to the second communication device at the beginning of the second data.

In a possible implementation manner of the second aspect, the first communication device further includes: a radio frequency transceiver module, wherein the processor is further configured to transmit the first data through multiple asynchronous carriers , Controlling the radio frequency transceiver module to switch the transceiver at the latest time when the transmission of the first data ends; when the switching of the transceiver ends, controlling the transmitter to the end time of the switching of the transceiver Sending the third data to the second communication device, and then sending the second data to the second communication device at the starting moment of the second data.

In a possible implementation manner of the second aspect, the transmitter is further configured to send multi-carrier error information to the second communication device, where the multi-carrier error information is used to indicate synchronization errors between multiple carriers length of time.

In a possible implementation manner of the second aspect, the transmitter is further configured to send radio frequency capability information to the second communication device, and the radio frequency capability information is used to instruct the first communication device to execute a transceiver The length of time for switching, and for indicating whether the first communication device supports transceiver switching in advance.

In a possible implementation manner of the second aspect, the first communication device further includes: a receiver, wherein the receiver is configured to receive second scheduling information sent by the second communication device, and the first The second scheduling information includes at least one of the following three parameters: a first scheduling parameter, a second scheduling parameter, and a third scheduling parameter, where the first scheduling parameter is used to indicate the starting moment of the second data, and the first Two scheduling parameters are used to indicate whether the first communication device performs transceiver switching in advance, and the third scheduling parameters are used to indicate the first communication device to listen to and then talk about LBT parameters; the processor also uses Determining the start time of the second data according to the first scheduling parameter, determining whether to perform transceiver switching in advance according to the second scheduling parameter, and determining the LBT parameter according to the third scheduling parameter.

In a possible implementation manner of the second aspect, the first communication device further includes: a receiver, wherein the receiver is configured to receive third scheduling information sent by the second communication device, and the first Three scheduling information is used to instruct the first communication device to obtain LBT parameters; the processor is also used to determine that the second communication device instructs the first communication device to obtain the LBT parameters; the processor Is also used to obtain the LBT parameter according to the first transceiver interval or the second transceiver interval.

In a possible implementation manner of the second aspect, the sending time of the third data stored in the memory is later than the ending time of the first data.

In a possible implementation manner of the second aspect, the processor is further configured to control the radio frequency transmit power to be less than or equal to a preset transmit power threshold before the end time of the first data arrives.

In a possible implementation manner of the second aspect, the processor is further configured to acquire first scheduling information and fourth scheduling information configured by the second communication device, and the first scheduling information is used to schedule the The first data, the fourth scheduling information is used to schedule the second data; the processor is further configured to determine the end time of the first data according to the time domain information indication of the first scheduling information; and , Determine the start time of the second data according to the time domain information indication of the fourth scheduling information and preset timing advance information TA.

In a possible implementation manner of the second aspect, the third data stored in the memory is a piece of data copied from the second data, or a random number, or a reference signal, and the third data The length is equal to the advance.

In the second aspect of the present application, the component modules of the first communication device may also perform the steps described in the foregoing first aspect and various possible implementations. For details, see the foregoing description of the first aspect and various possible implementations. Instructions.

In a third aspect, an embodiment of the present application provides a computer-readable storage medium that stores instructions, which when executed on a computer, causes the computer to execute the method described in the first aspect.

According to a fourth aspect, an embodiment of the present application provides a computer program product containing instructions, which when executed on a computer, causes the computer to execute the method described in the first aspect above.

According to a fifth aspect, an embodiment of the present application provides a communication device. The communication device may include an entity such as a terminal device or a chip. The communication device includes: a processor and a memory; the memory is used to store instructions; and the processor is used to Executing the instructions in the memory causes the communication device to execute the method according to any one of the aforementioned first aspects of China.

In a sixth aspect, the present application provides a chip system including a processor for supporting a communication device to implement the functions involved in the above aspects, for example, sending or processing data and/or information involved in the above method . In a possible design, the chip system further includes a memory for storing necessary program instructions and data of the communication device. The chip system may be composed of chips, and may also include chips and other discrete devices.

BRIEF DESCRIPTION

1 is a schematic diagram of a system architecture to which a data transmission method provided by an embodiment of the present application is applied;

FIG. 2 is a schematic flow block diagram of a method for applying a data transmission method provided by an embodiment of the present application to a first communication device;

3 is a schematic diagram of a transmission sequence of first data, second data, and third data provided by an embodiment of the present application;

4 is a schematic diagram of transceiver switching in a scenario of multiple non-synchronized carrier transmissions provided by an embodiment of the present application;

5 is a schematic flowchart of a terminal-based implementation of a data transmission method according to an embodiment of the present application;

FIG. 6 is a schematic diagram of transceiver switching in advance in an embodiment of the present application;

7 is a schematic structural diagram of a terminal provided by an embodiment of the present application for a terminal to switch a transceiver in advance;

8 is a schematic diagram of data filling in a transmission symbol in an embodiment of this application;

9 is a schematic diagram of complete data after supplementation provided by an embodiment of the present application;

10 is a schematic flowchart of another data transmission method based on a terminal implementation provided by an embodiment of the present application;

11 is a schematic diagram of using an unscheduled symbol for early transmission and reception switching according to an embodiment of the present application;

12 is a schematic diagram of determining an unscheduled downlink symbol provided by an embodiment of this application;

13 is a schematic structural diagram of another terminal provided by an embodiment of the present application in which a terminal switches a transceiver in advance;

14-a is a schematic structural diagram of a composition of a first communication device according to an embodiment of this application;

14-b is a schematic structural diagram of another first communication device according to an embodiment of the present application;

14-c is a schematic structural diagram of another first communication device according to an embodiment of the present application;

15 is a schematic structural diagram of another first communication device according to an embodiment of the present application.

detailed description

Embodiments of the present application provide a data transmission method and a communication device, which are used to reduce the length of an interval and reduce the risk of losing a channel.

The following describes the embodiments of the present application with reference to the drawings.

The terms “first” and “second” in the description and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequential order. It should be understood that the terminology used in this way is interchangeable under appropriate circumstances, which is only a way of distinguishing the objects of the same attribute used in the description of the embodiments of the present application. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, so that a process, method, system, product, or device containing a series of units need not be limited to those units, but may include no clear Other units listed or inherent to these processes, methods, products or equipment.

The technical solutions of the embodiments of the present application can be applied to various data processing communication systems, such as code division multiple access (code division multiple access (CDMA), time division multiple access (time division multiple access, TDMA), and frequency division multiple access (frequency division multiple access (FDMA), orthogonal frequency-division multiple access (OFDMA), single carrier frequency division multiple access (single carrier FDMA, SC-FDMA) and non-orthogonal multiple access (non-orthogonal multiple access) orthogonal multiple access (NOMA) system, etc. The term "system" can be used interchangeably with "network". CDMA systems can implement wireless technologies such as universal wireless terrestrial access (UTRA), CDMA2000, and so on. UTRA may include wideband CDMA (Wideband CDMA, WCDMA) technology and other CDMA variant technologies. CDMA2000 can cover interim standard (IS) 2000 (IS-2000), IS-95 and IS-856 standards. The TDMA system can implement wireless technologies such as global system for mobile (GSM). OFDMA system can realize such as evolved universal wireless terrestrial access (evolved UTRA, E-UTRA), ultra mobile broadband (ultra mobile broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash OFDMA And other wireless technologies. UTRA and E-UTRA are UMTS and UMTS evolved versions. 3GPP's long-term evolution (LTE) and various versions based on LTE evolution are new versions of UMTS that use E-UTRA. The fifth generation (5 Generation) communication system, the sixth generation (6 Generation) communication system, and the new radio (NR) are the next generation communication systems under study. In addition, the communication system may also be applicable to future-oriented communication technologies, and all the technical solutions provided by the embodiments of the present application are applicable. The system architecture and business scenarios described in the embodiments of the present application are to more clearly explain the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. With the evolution of the architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

The communication system provided by the embodiments of the present application includes at least: a first communication device and a second communication device. For example, the first communication device may be a terminal device, and the second communication device may be a network device. For example, the transmission between the network equipment and the terminal equipment can be transmitted through radio waves, and can also be transmitted through visible light, laser, infrared, light quantum, power line, optical fiber, coaxial cable, copper wire, etc. For another example, the first communication device may be a first terminal device, the second communication device may be a second terminal device, and the two terminal devices communicate through the PC5 port, for example, the transmission between the first terminal device and the second terminal device Sidelink data.

FIG. 1 shows a schematic structural diagram of a possible radio access network (RAN) according to an embodiment of the present application. The RAN may be a base station access system of a 2G network (that is, the RAN includes a base station and a base station controller), or may be a base station access system of a 3G network (that is, the RAN includes a base station and an RNC), or may be 4G A base station access system of the network (that is, the RAN includes an eNB and an RNC), or may be a base station access system of a 5G network.

The RAN includes one or more second communication devices, for example, the second communication device may be a network device. The network device may be any device with a wireless transceiver function, or a chip provided in a device with a specific wireless transceiver function. The network equipment includes but is not limited to: base stations (such as base stations BS, base stations NodeB, evolving base stations eNodeB or eNB, base stations gNodeB or gNB in fifth-generation 5G communication systems, base stations in future communication systems, and connection in WiFi systems Incoming node, wireless relay node, wireless backhaul node), etc. The base station may be: a macro base station, a micro base station, a pico base station, a small station, a relay station, etc. Multiple base stations can support one or more of the above-mentioned technology networks, or future evolution networks. The core network may support one or more technologies mentioned above or a future evolution network. The base station may include one or more co-site or non-co-site transmission and reception points (transmission receiving points, TRP). The network device may also be a wireless controller, a centralized unit (CU) or a distributed unit (DU) in a cloud radio access network (CRAN) scenario. The network device may also be a server, a wearable device, or a vehicle-mounted device. The following uses a network device as a base station as an example. The multiple network devices may be base stations of the same type or base stations of different types.

The first communication device may be a terminal device, for example, the base station may communicate with the terminal devices 1-6, or may communicate with the terminal devices 1-6 through a relay station. Terminal devices 1-6 can support communication with multiple base stations of different technologies, for example, the terminal device can support communication with base stations supporting LTE networks, can also support communication with base stations supporting 5G networks, and can also support base stations with LTE networks And the dual connection of the base station of 5G network. For example, the terminal is connected to the RAN node of the wireless network. At present, some examples of RAN nodes are: gNB, transmission reception point (TRP), evolved Node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), node B (Node B, NB), base station controller (BSC), base transceiver station (BTS), home base station (eg, home evolved NodeB, or home Node B, HNB), baseband unit , BBU), or wireless fidelity (Wifi) access point (access point, AP), etc. In a network structure, the network device may include a centralized unit (CU) node, or a distributed unit (DU) node, or a RAN device including a CU node and a DU node.

Terminal equipment 1-6, also known as user equipment (user equipment (UE), mobile station (MS), mobile terminal (MT), terminal, etc., is a way to provide voice and/or A device with data connectivity, or a chip installed in the device, for example, a handheld device, an on-vehicle device, etc. with wireless connection permission. At present, some examples of terminal devices are: mobile phones, tablets, laptops, PDAs, mobile Internet devices (MID), wearable devices, virtual reality (VR) devices, enhanced Augmented reality (AR) equipment, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote surgery, smart grid (smart) Wireless terminals in transportation, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, etc. The terminal device provided by the embodiment of the present application may be a low-complexity terminal device and/or a terminal device in coverage enhancement A mode.

In the embodiment of the present application, the base station and UE1 to UE6 form a communication system. In the communication system, the base station sends one or more of system information, RAR messages, and paging messages to one or more of UE1 to UE6. In addition, UE4 to UE6 also form a communication system. In this communication system, UE5 can be implemented as the function of a base station. UE5 can send one or more of system information, control information, and paging messages to UE4 and One or more UEs in UE6.

In the embodiment of the present application, there is a gap time between switching from sending downlink data by the second communication device to sending uplink data by the first communication device. In this interval, it belongs to the signal blank period. In order to achieve the purpose of the base station sharing the COT, while avoiding the preemption of the channel by other systems, the current standard provides as follows:

1. When the interval time is less than 16 microseconds (us), the first communication device may directly send uplink signals and data. In standard protocols, signals are generally terminated at the physical layer and do not bear data, such as uplink reference signals or pilot signals. Data generally carries channels, such as control data carried on control channels, such as service data carried on data channels.

2. When the interval time is greater than 16us and less than 25us, the first communication device needs to do a single LBT with a shorter time, that is, the first communication device needs to execute the LBT scheme 2 (cat2) to perform a random back-off.

3. When the interval time is greater than 25us, the first communication device may need to do LBT for a longer time, that is, the first communication device needs to execute the LBT scheme 4 (cat4), and random backoff of the variable contention window.

Within one channel occupation time (COT) acquired by the second communication device, no more than one uplink and downlink switching point greater than 16us and less than 25us is allowed.

Therefore, if the interval time exceeds 16us, the uplink and downlink switching cannot be performed multiple times in a COT, which will affect the flexibility of system scheduling and cannot meet the requirements of low latency of services. If the interval time is less than 16us, although the first communication device does not need to do LBT, it is also possible that other neighboring cells or sending nodes of different systems obtain the sending authority and send signals on the same channel, which will cause uplink signals Mutual interference.

In summary, due to the existence of the interval time between the uplink and downlink conversion, if the interval is between 16us and 25us, there is a risk of losing the channel due to the need to do LBT. At this time, if the channel is occupied by other nodes, not only the first communication device The uplink signal or data cannot be transmitted, and even the second communication device cannot transmit the downlink signal or data. If the interval time is greater than 25us, the first communication device needs to do LBT for a longer time, which increases the risk of losing the channel. When the interval time is less than 16us, although LBT is not required, it is possible that the sending nodes of other neighboring cells or different systems obtain the sending authority and send signals on the same channel, which will cause mutual interference to upstream signals.

In order to solve the problem of the channel loss risk caused by the excessive interval time in the prior art, the embodiments of the present application propose the following data transmission method, which is applicable to the uplink and downlink data switching process in the COT scenario, please refer to FIG. A schematic flow block diagram of a method for applying a data transmission method provided in an embodiment of the application to a first communication device mainly includes the following steps:

201. The first communication device determines the end time of the first data and the start time of the second data. The time period obtained by subtracting the end time of the first data from the start time of the second data is the first transmission and reception interval.

The first data is sent by the second communication device, and the second data is data to be sent by the first communication device.

The communication system to which the embodiment of the present invention is applied includes at least a first communication device and a second communication device. The first communication device may be a terminal device, the second communication device may be a network device, and the second communication device may send downlink data to the first communication device, for example, the downlink data sent by the second communication device is the above-mentioned first data. The first communication device may send uplink data to the second communication device, for example, the uplink data sent by the first communication device is the aforementioned second data to be sent. For another example, the first communication device may be a first terminal device, the second communication device may be a second terminal device, and the two terminal devices communicate through the PC5 port, and the first data may be the second terminal device to the first terminal The first side link data sent by the device, and the second data may be second side link data sent by the first terminal device to the second terminal device.

It should be noted that, in the embodiments of the present application, the data transmitted between the first communication device and the second communication device may be transceiver channel data, and may also include various signals. For example, the transceiver channel data may include data channel data and control. The channel data, for example, the signal may be a sounding reference signal (SRS), a channel state information reference signal (channel State information-reference signals (CSI-RS), a demodulation reference signal (DMRS), etc.).

In the embodiment of the present application, when performing data scheduling, the second communication device may indicate the end time of the first data and the start time of the second data to the first communication device in advance. Wherein, the end time of the first data refers to the time when the first data will be transmitted during downlink transmission, the second data refers to the upstream data to be sent, and the start time of the second data refers to the second communication device When the second data is scheduled for uplink transmission, when to start transmission.

In some embodiments of the present application, in step 201, the first communication device determines the end time of the first data and the start time of the second data, including:

The first communication device acquires first scheduling information and fourth scheduling information configured by the second communication device, the first scheduling information is used to schedule the first data, and the fourth scheduling information is used to schedule the second data;

The first communication device determines the end time of the first data according to the time domain information indication of the first scheduling information; and,

The first communication device determines the start time of the second data according to the time domain information indication of the fourth scheduling information and preset timing advance information (TA).

The second communication device sends first scheduling information and fourth scheduling information to the first communication device. The first scheduling information is used to schedule the first data, and the fourth scheduling information is used to schedule the second data. The first communication device first determines the time corresponding to the time slot (or symbol) boundary of the second communication device according to the synchronization signal, and the first scheduling information indicates the starting time slot (or symbol) occupied by the first data and the symbol occupied by the first data Number, the time domain information indication of the first scheduling information may include the time corresponding to the above-mentioned time slot (or symbol) boundary, the starting time slot (or symbol), and the number of symbols occupied by the data, according to the time domain information Indicate the end time for determining the first data. For example, the first communication device determines the end time S0 of the first data according to the time domain information indication of the first scheduling information, and the fourth scheduling information indicates the starting time slot (or symbol) occupied by the second data and the number of symbols occupied by the second data , Determine that the transmission time is t0 according to the fourth scheduling information, and then calculate the start time S1=t0-TA of the second data according to the preset timing advance information TA. The first transceiver interval = S1-S0.

202. The first communication device determines the sending time of the third data according to the start time and the advance amount of the second data, where the advance amount is determined according to the time unit information for transmitting the first data, and the third data is filled in by the first communication device. For the data at the front end of the second data, the time period obtained by subtracting the end time of the first data from the sending time of the third data is the second sending and receiving interval, and the second sending and receiving interval is smaller than the first sending and receiving interval.

Wherein, the first communication device determines an advance in advance, the advance is determined by the time unit information transmitting the first data, the time unit may be one symbol or multiple symbols, or the time unit may be a time slot or several Time slots, etc., the time unit for transmitting the first data refers to the symbol or time slot used to transmit the first data. The time unit information for transmitting the first data can be used to determine the advance amount in advance, and after obtaining the advance amount, subtract the advance amount based on the start time of the second data to be the sending time of the third data, that is, the third data needs Sent before the start time of the second data, the third data is the data that the first communication device fills in front of the second data. The time obtained by advancing an advance by the starting time of the second data is determined as the sending time of the third data. In the embodiment of the present application, the advancement can be measured by the length of time or the number of data samples, which is not limited here.

As shown in FIG. 3, it is a schematic diagram of a transmission sequence of first data, second data, and third data provided by an embodiment of the present application. The time period obtained by subtracting the end time of the first data from the start time of the second data is the first transmission and reception interval, and the time period obtained by subtracting the end time of the first data from the transmission time of the third data is the second transmission and reception interval Since the second transceiver interval is shortened by an advance amount compared to the first transceiver interval, the second transceiver interval is smaller than the first transceiver interval, that is, the interval for switching from receiving the first data to sending the third data is shorter than that from receiving the first The data switching is the interval time for sending the second data, which reduces the length of the interval time for uplink and downlink switching, thereby ensuring the stability of the system communication and the predictability of data scheduling.

Next, the advance amount in the embodiment of the present application will be described in detail. In some embodiments of the present application, the first communication device may perform transceiver switching in advance. The first communication device may include a radio frequency transceiver module, and the radio frequency transceiver module may be used for uplink and downlink conversion of radio frequency devices. In the prior art, the transceiver can be switched only when the downlink data transmission ends. In the embodiment of the present application, the transceiver can be switched without waiting for the downlink data transmission to end, that is, when the downlink data has not been received, the transceiver has already started. Switch. In the embodiment of the present application, the transceiver switching is performed in advance based on the end time of the downlink data, and the foregoing advancement amount may be used to indicate the advance time length for the transceiver switching in advance.

In some embodiments of the present application, the advance amount may be used to indicate the length of advance time for the transceiver switch in advance. In this scenario, in step 201, the first communication device determines the end time of the first data and the second data. After the start time, the data transmission method provided by the embodiment of the present application further includes the following steps:

A1. The first communication device determines the start time of the transceiver switching according to the end time and advance of the first data;

A2. The first communication device switches the transceiver at the start of the switch of the transceiver;

A3. After the switching of the transceiver is completed, the subsequent step 203 is triggered: the first communication device sends the third data to the second communication device at the sending time of the third data, and then sends the second communication to the second communication at the starting time of the second data The device sends the second data.

The advance amount may be used to indicate the length of advance time for the switch of the transceiver in advance. After the first communication device obtains the advance amount, the transceiver is advanced in advance based on the advance amount based on the end time of the first data. For the handover, the starting time that is advanced on the basis of the end time of the first data is determined as the starting time for the switch of the transceiver. The first communication device performs transceiver switching at the starting moment of transceiver switching, that is, the embodiment of the application implements transceiver switching in advance relative to the prior art, where the transceiver switching may also be referred to as radio frequency transceiver switching In this embodiment of the present application, transceiver switching is used as an example. The length of time required for switching of the transceiver can be determined according to the data transmission protocol between the first communication device and the second communication device, for example, the transceiver The length of time required for switching is not greater than 13us. When the switching of the transceiver is completed, the subsequent step 203 can be triggered to execute the first communication device to send the third data to the second communication device at the sending time of the third data, and then to the second communication device at the starting time of the second data Send the second data.

In some embodiments of the present application, after the first communication device determines the end time of the first data and the start time of the second data in step 201, the data transmission method provided by the embodiment of the present application further includes:

B1. The first communication device determines whether the first communication device satisfies the pre-receive switching condition according to the first transceiver interval and the cyclic prefix (CP) length information of the last time unit transmitting the first data.

Wherein, in the embodiment of the present application, the first communication device may also preset a pre-transmit/receive switching condition, and the pre-transmit/receive switching condition is a judgment condition for whether the transceiver can be switched in advance. In the embodiment of the present invention, after setting the pre-transmit/receive switching condition, the first communication device obtains the first transceiving interval and the CP length information of the last time unit transmitting the first data, and determines the CP length according to the first transceiving interval and the CP length. Whether the pre-transmit and receive switching conditions are met. For example, the early transmission and reception switching condition may include a threshold. If the difference between the first transmission and reception interval minus the CP length is less than the threshold, it may be determined that the first communication device meets the early transmission and reception switching condition. If the first transmission and reception interval minus the CP length The obtained difference value is greater than or equal to the threshold value, and it can be determined that the first communication device does not satisfy the pre-transmit and receive switching condition.

In some embodiments of the present application, in addition to performing the foregoing step B1, the data transmission method provided by the embodiments of the present application may further include the following steps:

C1. When the first communication device satisfies the pre-receive switching condition, the first communication device determines the advance amount according to the CP length information of the last time unit transmitting the first data.

Wherein, when the first communication device satisfies the pre-transmit/receive switching condition, the advance amount in step 202 may be determined according to the CP length of the last time unit transmitting the first data. For example, the first communication device may change the advance amount d Set to d=CP length, or d=3/4CP length, or d=1/2 CP length. As long as the pre-transmit and receive switching conditions can be met, the first communication device may determine the relationship between the advance amount and the CP length according to specific scenarios.

In some embodiments of the present application, in addition to performing the foregoing steps B1 or C1, the data transmission method provided by the embodiments of the present application may further include the following steps:

D1. The first communication device acquires the subcarrier interval of the first data and the CP type information of the last time unit transmitting the first data;

D2. The first communication device determines the CP length information of the last time unit transmitting the first data according to the subcarrier interval of the first data and the CP type information.

The subcarrier spacing (SCS) of the first data obtained by the first communication device is a frequency value, and the CP type information of the last time unit of the first data transmitted by the first communication device may include: Regular cyclic prefix (normal cyclic prefix) and extended cyclic prefix (extended cyclic prefix), where the length of the regular cyclic prefix is 4.7us and the length of the extended cyclic prefix is 16.67us. The first communication device determines the CP length information of the last time unit transmitting the first data according to the subcarrier interval of the first data and the CP type information. The following is an example. The first communication device can calculate the CP value of the symbol and the CP type and the CP length of the last symbol. If the current parameters are used, the number or time of the CP data samples can be calculated as shown in Table 1 below. Show.

E1: The first communication device determines a time unit that is not scheduled to the first communication device according to the first scheduling information configured by the second communication device, and the first scheduling information is used to schedule the first data;

E2. The first communication device determines the advance according to a time unit that is not scheduled to the first communication device.

Before the second communication device sends the first data, the second communication device sends the first scheduling information to the first communication device, and the second communication device sends the first data to the first communication device according to the first scheduling information. The first communication device determines the time unit that is not scheduled to the first communication device according to the first scheduling information. The time unit that is not scheduled to the first communication device refers to that no longer communicates with the first communication at the end of the time unit transmitting the first data The time unit in which the device sends data, for example, no more data is sent to the first communication device at the end within the last symbol that sent the first data. The first communication device determines the advancement according to the time unit not scheduled to the first communication device, for example, the advancement in step 202 may not be greater than the time unit not scheduled to the first communication device, and the first communication device may advance according to the advancement Transceiver switching is performed, thereby reducing the length of the interval between uplink and downlink switching, thereby ensuring the stability of system communication and the predictability of data scheduling.

Further, in some embodiments of the present application, the time unit not scheduled to the first communication device includes at least one of the following time units:

There is no time unit for scheduling data to the first communication device, a time unit for scheduling data that the first communication device has received, and a time unit for scheduling data to other communication devices than the first communication device.

Among them, the failure to schedule data to the first communication device refers to the fact that the second communication device does not send data to the first communication device. The following is an example. In the downlink time slot adjacent to the uplink time slot, there are 14 symbols in total, numbered 0 To 13. When the downlink scheduling information indicates that numbers 0-10 have data scheduled to the first communication device, but symbols 11-13 are not scheduled to the first communication device, it is considered that there are a total of 4 symbols that have not been scheduled. The 4 symbols that schedule data to the first communication device can be used to determine the advance. The time unit for scheduling data that the first communication device has received refers to the time unit for the first communication device to repeatedly receive data. An example is described below. If the first communication device receives broadcast signal scheduling information, the broadcast signal is periodic. Sent, for the first communication device, this transmission may not be received. These broadcast signals may be regarded as unscheduled signals. The time unit for scheduling data that the first communication device has received can be used to determine the advance. Another example: the data scheduled for the first communication device is retransmission data, the data carried by the last symbol or symbols of these retransmission data, the first communication device has decoded correctly in the previous transmission process, and no more Receiving these data, these retransmitted data can be regarded as unscheduled signals, and the time unit for scheduling the data that the first communication device has received can be used to determine the advance. The time unit for scheduling data to other communication devices except the first communication device means that the time unit is not used for scheduling to the first communication device, but is used for scheduling data to other communication devices, then the time unit is still unscheduled For the time unit of the first communication device, the time unit for scheduling data to other communication devices other than the first communication device may be used to determine the advance.

It should be noted that, in the above embodiment of the present application, on the time unit not scheduled to the first communication device, the second communication device may schedule data to other communication devices except the first communication device, so the first communication The device no longer needs to receive this data. In addition, in the calculation of the uplink and downlink scheduling interval, the end time of the first data is the end time of the data actually scheduled by the second communication device.

In some embodiments of the present application, the second communication device may send the first data to the first communication device by using a single carrier or by using multiple carrier aggregation.

When the first data is transmitted through a single carrier or multiple synchronization carriers, the data transmission method provided by the embodiments of the present application further includes:

F1. The first communication device switches the transceiver at the end of the first data;

F2. When the transceiver switching ends, the first communication device sends third data to the second communications device at the end of the transceiver switching, and then sends the second data to the second communication device at the beginning of the second data .

In the implementation scenario of step F1 to step F2, the first communication device starts switching of the transceiver at the end time of the first data. The end time of the switching of the transceiver is the sending time of the third data, and the first communication device sends the third data to the second communication device at the end of the switching of the transceiver, and then sends the third data to the second The communication device sends the second data. In this way, the transceiver interval can be reduced to the time when the RF transceiver hardware switches (such as 13us). The embodiments of the present application can be applied to a single carrier scenario or multiple synchronized carrier scenarios, where multiple synchronized carriers can be the same network Carrier under standard system. As an example, the first communication device uses the same set of receivers to receive carrier 1 and carrier 2 signals and data. From the perspective of the first communication device, carrier 1 and carrier 2 are completely synchronized, that is, the transmission and reception switching point of carrier 1 and the transmission and reception switching point of carrier 2 are the same.

When the first data is transmitted through a single carrier or multiple synchronous carriers, at the end of the first data, the transceiver switching is started. After the transceiver switching is completed, the third data can be sent, and the interval between uplink and downlink switching can be transmitted. The time is reduced to the time when the transceiver is switched, thereby effectively reducing the interval time between uplink and downlink switching.

It should be noted that the embodiments of steps F1 to F2 can still be combined with the aforementioned embodiments of steps A1 to A3, and the interval time between uplink and downlink switching can be further reduced to reduce the risk of channel loss.

In other embodiments of the present application, when the first data is transmitted through multiple asynchronous carriers, the data transmission method provided by the embodiments of the present application further includes:

F3. The first communication device switches the transceiver at the moment when the transmission of the first data ends at the latest;

F4. When the transceiver switching ends, the first communication device sends third data to the second communication device at the end of the transceiver switching, and then sends the second data to the second communication device at the beginning of the second data .

In the implementation scenario of steps F3 to F4, when there is an error in downlink synchronization between multiple carriers, it is necessary to wait for the latest carrier to receive the first data before switching the transceiver.

As shown in FIG. 4, a schematic diagram of transceiver switching in a scenario of multiple asynchronous carrier transmissions provided by an embodiment of the present application. The first communication device uses the same set of receivers to receive carrier 1 and carrier 2 signals and data. The multiple non-synchronized carriers may be multiple carriers under the same network standard system, and the multiple non-synchronized carriers may also be carriers under different network standard systems, such as multiple non-synchronized carriers under the LTE system and the NR system. From the perspective of the first communication device, carrier 1 and carrier 2 are not synchronized, that is, there is a synchronization error, for example, the synchronization error is d microseconds, that is, the time that carrier 2 lags carrier 1 is d microseconds, in order to ensure the downlink data of carrier 2 For the reception integrity of the transceiver, the transceiver needs to switch at the end of the downlink time slot of carrier 2 and cannot switch at the end of the downlink time slot of carrier 1.

In this way, for carrier 1, the length of the uplink and downlink data interval is at least equal to the inter-carrier synchronization error d plus the transceiver switching time. If the synchronization error d is larger, the length of the uplink and downlink data interval is larger. There are two reasons for the synchronization error between different carriers: First, the device accuracy of different carriers and the drift in temperature (timer error or oscillator offset) are different, resulting in an error in the transmission time. Second, different carrier signals have different paths, resulting in different multipath delays. If the value of the synchronization error d needs to be reduced, the device accuracy or algorithm accuracy of the base station or terminal needs to be improved, which will increase the cost of the base station or terminal, or increase the complexity of the base station or terminal.

The embodiments of steps F3 to F4 in the embodiments of the present application can be combined with the foregoing embodiments of steps A1 to A3, which can reduce the requirements on device accuracy or algorithm complexity, thereby reducing costs. When the current system is on multiple carriers, especially when the first communication device cannot ensure the signal reception synchronization, it is necessary to wait for the time synchronization to complete the reception of the first data of the last carrier before it can start the RF transceiver conversion, and its lag time depends on the carrier Timing error. Using the transceiver switching in advance in the foregoing embodiments of the present application can better reduce the interval between uplink and downlink switching, reduce the risk of channel loss, and improve the efficiency of system data transmission.

In some embodiments of the present application, the data transmission method provided by the embodiments of the present application may further include the following steps:

G1. The first communication device sends radio frequency capability information to the second communication device. The radio frequency capability information is used to indicate the length of time that the first communication device performs transceiver switching, and to indicate whether the first communication device supports the transceiver in advance. Switch.

In order to enable better scheduling and data transmission between the first communication device and the second communication device, the first communication device also needs to interact with the second communication device, and the first communication device sends radio frequency capability information to the second communication device The radio frequency capability information is used to indicate the length of time that the first communication device performs transceiver switching, and to indicate whether the first communication device supports transceiver switching in advance.

An example is described as follows. The first communication device reports the length of time the transceiver is switched. For example, to report the specific value of transceiver switching, you can use 4 bits of information to indicate the specific time of RF switching, in microseconds, or use 3 bits or 2 bits of information to indicate different carriers and basic transceiver switching The difference delta of the capability, for example, the basic transmit-receive switching capability can be 13us, then the actual transmit-receive switching time value of different carriers=13-reported delta. In addition, the first communication device may also report whether the first communication device supports early switching of the transceiver, the second communication device receives the radio frequency capability information, and if the first communication device supports early switching of the transceiver, the second communication The device may indicate whether the first communication device uses transceiver switching in advance.

H1. The first communication device sends multi-carrier error information to the second communication device, and the multi-carrier error information is used to indicate the length of the synchronization error between multiple carriers.

The first communication device may also report the synchronization error between multiple carriers to the second communication device, for example, the first communication device sends multi-carrier error information, and the multi-carrier error information may include: the synchronization error of each carrier. For example, the synchronization error of each carrier may include: carrier ID and timing error, as shown in Table 2 below:

I1. The first communication device receives second scheduling information sent by the second communication device. The second scheduling information includes at least one of the following three parameters: a first scheduling parameter, a second scheduling parameter, and a third scheduling parameter, the first scheduling The parameter is used to indicate the starting moment of the second data, the second scheduling parameter is used to indicate whether the first communication device performs transceiver switching in advance, and the third scheduling parameter is used to indicate the first communication device to listen before speaking talk, LBT) parameters;

I2. The first communication device determines the start time of the second data according to the first scheduling parameter, determines whether to switch the transceiver in advance according to the second scheduling parameter, and determines the LBT parameter according to the third scheduling parameter.

The second communication device sends second scheduling information to the first communication device. The second scheduling information includes at least one of the following three parameters: a first scheduling parameter, a second scheduling parameter, and a third scheduling parameter, and the first scheduling parameter It is used to indicate the starting moment of the second data, the second scheduling parameter is used to indicate whether the first communication device performs transceiver switching in advance, and the third scheduling parameter is used to indicate the LBT parameter of the first communication device. For example, as follows, when the second communication device schedules the first communication device to send the second data, it instructs the first communication device to do the LBT type and LBT access level parameters before sending the second data. Among the three scheduling parameters sent by the second communication device, the first scheduling parameter is used to indicate the starting moment of the second data, which may be, for example, a time slot or a symbol position, and the second scheduling parameter is used to indicate whether the first communication device performs the interval In the method of shortening the time, if the value of the second scheduling parameter is 0, it means that the interval time of non-execution is reduced, and if the value of the second scheduling parameter is 1, it means that the GAP is reduced. The third scheduling parameter can indicate the LBT access type. If the value of the third scheduling parameter is 00, it means that there is no LBT, that is, it is sent directly. If the value of the third scheduling parameter is 01, it means that it is LBTcat2, if the third scheduling parameter If the value is 10, it means to do LBT CAT4. If the third scheduling parameter is 11, it means reserved field.

The second communication device may generate a second scheduling parameter for indicating whether the first communication device performs transceiver switching in advance. As an example, as follows, the second communication device first calculates the interval time between uplink and downlink switching = switching delay relative to the current carrier + transceiver switching time, and then the second communication device determines the possible advance of the first communication device. The interval between line switching is greater than 16us, and (the interval between uplink and downlink switching-possible advance of the first communication device)<16us, then the second communication device instructs the first communication device to switch the transceiver in advance. If the interval time between uplink and downlink switching is less than 16, the first communication device is not instructed to switch the transceiver in advance, and it is up to the first communication device to decide whether to perform the early switch.

The first communication device receives the third scheduling information sent by the second communication device, where the third scheduling information is used to instruct the first communication device to obtain the LBT parameter;

The first communication device determines that the second communication device indicates that the first communication device acquires LBT parameters;

The first communication device acquires LBT parameters according to the first transceiving interval or the second transceiving interval.

When the second communication device sends the third scheduling message to the first communication device, the second communication device may set the type of LBT to that the first communication device obtains the LBT parameters by itself, that is, the second communication device no longer sends A communication device indicates a specific LBT parameter, and the third scheduling information is used to indicate that the first communication device acquires the LBT parameter. After receiving the third scheduling information, the first communication device determines that the type of LBT is determined by the first communication device itself. The first communication device can calculate the uplink and downlink data transmission and reception intervals that can be achieved, and perform the corresponding LBT. For example, the transmission and reception interval that can be achieved is not greater than 16us, and the first communication device may directly transmit the uplink data at the scheduled time without performing LBT. For another example, when the transmission and reception interval can be greater than 16us and less than 25us, the first communication device may select LBTcat2. It should be noted that the transmission and reception interval that can be achieved here may be the time of the first transmission and reception interval determined by the first communication device, or the time of the second transmission and reception interval determined by the first communication device.

In some embodiments of the present application, the sending time of the third data is later than the ending time of the first data.

Among them, if the time after the first communication device performs the switching of the transceiver is earlier than the end time of the first data, in order to reduce the interference caused by the first communication device sending the third data to other users, it is necessary to control the sending of the third data The time cannot be earlier than the end time of the first data. For example, the first communication device may limit the advance amount of the transceiver switching in advance, assuming that the end time of the last downlink symbol is S0, and the first communication device completes the transceiver switching time is S3 , Then S3 cannot be earlier than S0.

In some embodiments of the present application, the data transmission method provided by the embodiments of the present application further includes the following steps:

Before the end time of the first data arrives, the first communication device controls the radio frequency transmission power to be less than or equal to the preset transmission power threshold.

Wherein, if the time after the first communication device performs the switching of the transceiver is earlier than the end time of the first data, in order to reduce the interference caused to the other users by the first communication device sending the third data, the first communication device is performing transceiving After the switch of the message, it is necessary to control the power of the transmitted signal, assuming that the end time of the last downlink symbol is S0, and the terminal’s transmission power threshold is P0, for example, the transmission power threshold is the minimum transmission power P0. In radio frequency control, the first communication device The transmit power of is not greater than P0 before S0.

203. The first communication device sends the third data to the second communication device at the sending time of the third data, and then sends the second data to the second communication device at the starting time of the second data.

In the embodiment of the present application, before sending the second data according to the start time when the second communication device schedules the second data, the first communication device first sends the third data filled in the front end of the second data, thereby reducing The data switching is the length of the signal blank period in the interval between sending the second data, thereby shortening the interval between uplink and downlink switching to the second transceiver interval, thus ensuring the stability of the system communication and the predictability of data scheduling.

In some embodiments of the present application, the third data is a piece of data copied from the second data, or a random number, or a reference signal, and the length of the third data is equal to the advancement. For example, the data transmission method provided by the embodiments of the present application may further include the following steps:

J1. The first communication device copies a piece of data from the second data as the third data according to the advancement, and the length of the third data is equal to the advancement;

J2. The first communication device adds the third data to the front end of the CP header of the first time unit that transmits the second data to obtain the second data added with the third data.

The second data is uplink data to be sent, and a piece of data is copied from the second data as the third data, and the length of the third data is equal to the advancement. In order to reduce the problem of inter-symbol interference caused by channel multipath, a CP technology can be introduced into the communication system, that is, a CP header can be added to the first time unit for transmitting the second data. The CP header can be from the second A piece of data copied from the end of the data. For example, the third data is a piece of data copied from the second data. The copied third data can form a new CP with the original CP of the second data. The third data in the embodiment of the present application may be the third data. A piece of data located before the tail of the second data and adjacent to the tail data in the second data. The copied third data can be added to the front end of the CP header, so that the second data added with the third data can be obtained, and finally the first communication device sends the third data at the sending moment of the third data, and then the second data The second data is sent at the beginning of the data.

K1. The first communication device adds third data to the front of the CP header of the first time unit that transmits the second data. The third data is a random number or a reference signal.

In the above step K1, the first communication device may add third data to the front of the CP header of the first time unit transmitting the second data, and the third data generated by the first communication device may be a random number or a reference signal . As an example, the first communication device expands the subcarrier interval, for example, from 15KHz to 60KHz, so that the average symbol length changes from 71.4us to 17.86us, and the reference signal can be sent before the second data is sent. The signal enables the receiving end to increase the resources for channel estimation, makes the channel estimation result more accurate, and helps improve the receiving performance of the receiving end.

It can be known from the examples in the foregoing embodiments that the first communication device first determines the end time of the first data and the start time of the second data. The time period obtained by subtracting the end time of the first data from the start time of the second data is In the first transmission and reception interval, the first data is sent by the second communication device, the second data is the data to be sent by the first communication device, and the first communication device next determines the third data according to the start time and advance of the second data The sending time, the advance amount is determined according to the time unit information for transmitting the first data, the third data is the data filled by the first communication device at the front end of the second data, and the sending time of the third data minus the end time of the first data The time period is the second sending and receiving interval, and the second sending and receiving interval is smaller than the first sending and receiving interval. The first communication device sends the third data to the second communication device at the sending time of the third data, and then sends The second communication device sends the second data. In the embodiment of the present application, the sending time of the third data is determined based on the starting time and the advance of the second data, so that the third data is sent before the starting time of the second data, the second in the embodiment of the present application The sending and receiving interval is shorter than the first sending and receiving interval, that is, the interval between switching from receiving the first data to sending the third data is shorter than the switching from receiving the first data to sending the second data, which reduces the length of the uplink and downlink switching interval, So as to ensure the stability of system communication and the predictability of data scheduling.

In order to facilitate a better understanding and implementation of the above solutions of the embodiments of the present application, the following application examples are used for specific description.

An embodiment of the present application provides a data transmission method, which starts transceiver switching in advance and sends uplink data after the switching is completed, thereby reducing the length of the interval between uplink and downlink switching.

Next, an example will be described by taking the first communication device as a terminal and the second communication device as a base station as an example. As shown in FIG. 5, it is a schematic flowchart of a terminal-based implementation of a data transmission method provided by an embodiment of the present application, which mainly includes the following processes:

S10. The terminal determines whether the pre-transmit and receive switching conditions are satisfied.

Among them, the terminal can determine whether the condition for switching the transceiver in advance is satisfied.

As shown in FIG. 6, it is a schematic diagram of the transceiver switching in advance in the embodiment of the present application. In order to reduce the problem of inter-symbol interference caused by channel multipath, orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) system introduces CP technology, CP1 is to copy the data at the end of the first data (ie, data 1) A copy is placed on the head of the first data.

The terminal receives the scheduling information of the base station, sends the time t0 according to the uplink scheduling information, and calculates the start time of the second data considering the timing advance information TA: S1=t0-TA. The terminal calculates the end time S0 of the first data according to the timing information.

The condition for the transceiver switching in advance can be set as: S1-S0> threshold 1, and (S1-S0-CP) <threshold 1, the S11 can be executed if this condition is met.

Among them, when S1-S0 is greater than the threshold 1, the terminal needs to do additional work, such as threshold 1 = 16us, greater than 16us, the terminal needs to perform the LBT cat2 process, if the threshold 1 is less than 16us, do not need to do LBT cat2. For example, the threshold 1=25us, S1-S0 greater than the threshold 25us need to do LBTcat4 process, S1-S0 is less than the threshold 25us do not need to do LBTcat4 process, but only need to do LBTcat2.

S11. The terminal determines the advance amount of the transceiver switching.

The terminal may determine the advancement according to the CP length of the last downlink symbol.

As an example, the terminal calculates the advance time point S2 at which the transceiver can be switched in advance. As shown in FIG. 6, assuming that the original position of the transceiver switch is the last bit S0 of the first data, the advance calculated in the following steps is d, the early switching start time point S2=S0-d. The early switching end time point is S3=S1-d.

Next, the process of calculating the CP length will be described. The terminal calculates and switches the CP length of the adjacent downlink symbol according to the subcarrier interval value of the symbol and the CP type. If the current parameters are used, the number of CP points or the length of time can be calculated.

It should be noted that in a 5G system, there are 14 symbols in a time slot. If the symbol is 0 or 7 in a time slot, the corresponding CP is longer than the CP of other symbols. A constant, such as the constant It is the value of 16 samples.

Next, the calculation of the early switching time point will be explained. Using the CP supplement principle, that is, the position of the CP starting point and the data at the end of the symbol have the same area data. Confirm the number of samples with repeated (or similar) data sequences. The sample points are the data that can be sent and received in advance. It should be noted that the calculation in this step needs to be calculated in advance, and the calculated early switching amount is less than the length of the CP.

In the embodiment of the present application, the advancement amount may be set to d=CP length, or d=3/4CP length, or d=1/2 CP length, as long as the goal of step S0 can be met.

It should be noted that the calculation process of steps S10 and S11 can be performed after receiving the base station scheduling command.

S12. The terminal performs transceiver switching in advance according to the advance amount.

Among them, the terminal can send and receive in advance according to the time point calculated in advance.

As shown in FIG. 7, it is a schematic structural diagram of a terminal provided by an embodiment of the present application in which a terminal switches a transceiver in advance. The transceiver may include: a baseband chip, a radio frequency chip, an antenna switch module, and an antenna. The baseband chip is used for baseband processing. The baseband chip may include: a transceiver timing calculation module, and the radio frequency chip may include: a digital-to-analog conversion module, an amplifier, a filter, a mixer, an amplifier, and a filter. Among them, the baseband chip controls the radio frequency channel of the radio frequency chip to open at S2, the baseband chip sends an antenna transceiver control command to the antenna transceiver module, and the antenna transceiver module starts antenna transceiver switching at S2.

For example, as follows, the terminal instructs the radio frequency to switch between sending and receiving according to the indicated time point by controlling the antenna switch module and the radio frequency channel according to the calculation of the new sending and receiving switching time point. As shown in FIG. 6, assume that the original transmission and reception switching position is the last bit S0 of the downlink symbol, the advance amount calculated in the above steps is d, the early switching start time point S2=S0-d, and the early switching end time point is S3=S1 -d, that is, the antenna can start sending the third data (that is, CP2) from time S3, and then send the second data data after the third data is sent, where the third data can be data copied from the tail of the second data 2.

There are two ways to implement the command transmission of antenna transceiver switching: 1: send and receive commands at switching time S2. 2: After the calculation is completed, the uplink data is immediately sent to the antenna switch module, which is buffered by the antenna switch module. When the time arrives, the command takes effect and the switching command is executed.

S13. The terminal compensates for the downlink data lost due to the transmission and reception switching performed in advance.

Among them, the terminal can use the CP information of the lost downlink symbol data to supplement the lost downlink data.

S14. The terminal sends the third data according to the advance amount, and then sends the second data.

The third data sent by the terminal is CP2 composed of data 2 in FIG. 6.

In the embodiment of the present application, the terminal needs to perform data filling and transmission in the early switching time period d. After the radio frequency completes the transmission and reception switching, within the period from the completion of the switching to the transmission of the uplink symbol, the terminal transmits a signal, and the transmitted signal is third data, which may be data 2 copied from the end of the second data. The third data can be used as the CP header of the second data, and the third data can also be obtained by padding with random numbers.

First, the filling method of copying data from the end of the second data will be described. As shown in FIG. 8, it is a schematic diagram of data filling in sending symbols in an embodiment of the present application. The original OFDM data is:

X(N) = x(0), x(1), x(2)... X(N-CP), X(N-CP+1), X(N-CP+2), ..., X( N-1);

The data after adding CP is:

X(N+CP) = x(N-CP), x(N-CP+1), x(N-CP+2), X(N-1), x(0), x(1), x (2).. X(N-CP), X(N-CP+1), X(N-CP+2), ..., X(N-1);

Then the supplementary data of d data samples ahead of time for the sending and receiving switching is:

X(N-CP-d), X(N-CP-d+1), X(N-CP-d+2)...x(N-CP-1).

Next, the padding of the received signal will be explained. Because of the early switching, not all the received data signals are filled with the CP data in the symbol header.

For a better explanation, it is assumed that the advance d = the length of CP.

As shown in FIG. 9, it is a schematic diagram of supplemented complete data provided by an embodiment of the present application. Assume that at the sending end, the original OFDM data is:

X(N) = x(0), x(1), x(2)... X(N-CP), X(N-CP+1), X(N-CP+2), ..., X( N-1);

The data after the sending end adds the CP is:

X(N+CP) = x(N-CP), x(N-CP+1), x(N-CP+2), X(N-1), x(0), x(1), x (2)...X(N-CP),X(N-CP+1),X(N-CP+2),...,X(N-1);

When the sending and receiving are not advanced, the terminal can obtain the following OFMD data:

X(N) = x(0), x(1), x(2)... X(N-CP), X(N-CP+1), X(N-CP+2), ..., X( N-1);

When the transmission and reception switching is advanced, the advancement is d = CP data points, and the received symbol data information is:

X(N+CP-d) = x(N-CP), x(N-CP+1), x(N-CP+2), X(N-1), x(0), x(1) , x(2).. X(N-CP), X(N-CP+1), X(N-CP+2), ..., X(N-1-CP).

Copy the first d data (d=CP) of the received sequence to the intercepted sequence, then:

X(N+CP) = x(N-CP), x(N-CP+1), x(N-CP+2), X(N-1), x(0), x(1), x (2).. X(N-CP), X(N-CP+1), X(N-CP+2)…X(N-1-CP), x(N-CP), x(N- CP+1), x(N-CP+2), ..., X(N-1).

So that the terminal can get OFDM data:

X(N) = x(0), x(1), x(2)... X(N-CP), X(N-CP+1), X(N-CP+2)...X(N- 1).

In some embodiments of the present application, the terminal sends the third data first and then the second data according to the advance amount, where the third data may be: intercepting the tail data of part of the second data to be sent, or padding random numbers , Or reference signal. The filling method of copying data from the tail of the second data according to the embodiment of the present application has stronger anti-multipath delay capability and less impact on other terminals. When the third data is a reference signal, it can play a role in assisting channel estimation or energy statistics to improve demodulation performance.

It is not limited that the receiving end can also directly use zero-filling or random-number supplementing to demodulate data, thereby simplifying the data demodulation process.

It should be noted that, in the embodiment of the present application, the subcarrier interval can also be expanded, for example, originally 15KHz to 60KHz, so that the average symbol length changes from 71.4us to 17.86us, and reference signals can be sent on the relevant symbols , Increase the resources for channel estimation, the result of channel estimation is more accurate, which helps to improve the receiving performance of the receiving end. The reference signal has a broader meaning. In addition to being a wake-up signal and a pilot signal, it can also be used for signal strength measurement. For example, a wake-up signal is sent to allow the receiving end to start the data receiving process. The wake-up signal is used to wake the receiving end to start receiving and processing data, and the pilot signal is used to perform channel estimation at the receiving end.

It can be known from the foregoing examples that, without affecting performance, the embodiments of the present application use the CP feature to switch transceivers in advance to reduce the value of the signal interval between downlink and uplink. The longest time for early switching can be the length of the CP, so that the longer the CP, the more obvious the gain.

As shown in FIG. 10, it is a schematic flowchart of another terminal data transmission method provided by an embodiment of the present application based on a terminal, mainly including the following processes:

S20: The terminal calculates the number of unscheduled downlink symbols at the end of the downlink time slot.

The terminal confirms the position and number of symbols to be received according to the downlink scheduling control information. For example, the unscheduled symbols can be determined from the last symbol of the downlink time slot. When there is a continuous symbol at the last bit of the downlink time slot that is not scheduled, it can be regarded as an unscheduled downlink symbol.

As shown in FIG. 11, it is a schematic diagram of using an unscheduled symbol for early transmission and reception switching provided by an embodiment of the present application. In FIG. 11, in the prior art, the switching point performs the transceiver switching in advance at the last downlink symbol, for example, the switching time point is S2, and the switching end time point is S3. Compared with the prior art, the interval time after early switching is greatly shortened.

An example is as follows. In the downlink time slot adjacent to the uplink time slot, there are 14 symbols in total, numbered 0-13. When the downlink scheduling information indicates that symbols 0-10 have downlink data scheduled for the terminal, but symbols 11-13 are not scheduled to the terminal, it is considered that there are a total of 4 symbols that have not been scheduled, and these 4 symbols can be regarded as unscheduled Scheduling symbol. An example is described as follows: the receiving end receives scheduling information and uplink and downlink time slot matching information. The receiving end receives the downlink scheduling information sent by the base station. The scheduling information may be scheduling information sent by the control channel, or semi-static scheduling information configured by high-level signaling. The downlink scheduling information includes the following contents: scheduling slot information, data start symbol position and data end symbol position. Wherein, the scheduling time slot information may indicate in which time slot the scheduling data is scheduled, the data start symbol position indicates the scheduling data start symbol, and the data end symbol position indicates the scheduling data end symbol position.

The receiving end receives uplink and downlink time slot matching information sent by the base station, and the information includes which subframes/slots are configured as downlink and which subframes/slots are configured as uplink. Then the receiving end judges whether there is an unscheduled downlink symbol at the end of the downlink symbol. Assume that in the uplink and downlink matching information, the slot number closest to the uplink and downlink time slots or symbols is n1, and the last downlink symbol is the symbol L1. Assume that in the downlink scheduling received by the terminal, if there is no corresponding scheduling data on the L1 symbol in the n1 time slot, the symbol L1 can be regarded as an unscheduled downlink symbol. Similarly, if there is no corresponding scheduling data on the L1-1 symbol in the n1 time slot, the symbol L1-1 can be regarded as an unscheduled downlink symbol, and so on, and it can be judged whether there are more downlink scheduled symbols .

As shown in FIG. 12, it is a schematic diagram of determining an unscheduled downlink symbol provided by an embodiment of the present application. One slot contains 14 symbols, 10 of the 14 symbols are downlink symbols, and 4 are uplink symbols. In a slot containing both downlink symbols and uplink symbols, 0-9 symbols are downlink symbols, but in Among the three symbols of 7, 8, and 9, there is no data scheduled for the terminal. Therefore, the symbols of 7, 8, and 9 can be regarded as unscheduled symbols and can be used for transceiver switching.

In some embodiments of the present application, if the terminal receives broadcast signal scheduling information, since the broadcast signal is sent periodically, the terminal may not receive the transmission for this time, and these symbol terminals can be regarded as unscheduled signal. If the terminal judges that the currently received signal quality is good, even if the last one or two scheduling symbols are not received, it will not affect the user experience. The terminal may also treat the last signals as unscheduled symbols.

S21. The terminal determines whether the condition for switching the transceiver in advance is satisfied.

The terminal judges whether the condition for switching the transceiver in advance is satisfied. The terminal receives the scheduling information of the base station, transmits the time t0 according to the uplink scheduling information, and calculates the transmission time in consideration of TA: S1=t0-TA. The terminal calculates the end time S0 of the downlink symbol according to the timing information.

If S1-S0>threshold 1 and (S1-S0-number of unscheduled symbols)<threshold 1, S22 is executed. When S1-S0 is greater than the threshold 1, the terminal needs to do additional work, such as threshold 1 = 16us, S1-S0 is greater than 16us, LBT cat2 process is required, and less than 16us, LBT cat2 is not required, such as threshold 1 = 25us, S1- S0 greater than the threshold of 25us requires LBTcat4 process, S1-S0 is less than the threshold of 25us does not need LBTcat4 process, but only need to do LBTcat2.

S22. The terminal performs transceiver switching in advance according to the advance amount.

Among them, the terminal can use the unscheduled symbol to switch the transceiver in advance, for example, the terminal analyzes the downlink scheduling information, and if there is no data to be received on the last symbol of the downlink, the transceiver switch is performed in advance.

S23. The terminal first sends the third data according to the advance, and then sends the second data.

Assuming that the original transmission/reception switching position is the last symbol S0 of the downlink symbol, and the advance calculated in the above step is the d symbol, then the early switching start time point S2=S0-d, and the early switching end time point is S3=S2-d. That is, the antenna can start sending the third data from time S3, and after the third data is sent, the second data is sent at the start time of the second data.

It should be noted that if the calculated d is too large, that is, the time after the terminal sends and receives the switchover is earlier than the end time of the downlink symbol, in order to reduce the interference caused by the terminal sending the third signal to other users, it is necessary to control the actual line transmission. The signal cannot be earlier than the end time of the downlink. The embodiment of the present application can limit the time for the transceiver switching in advance. Assuming that the end time of the last downlink symbol is S0 and the terminal completes the transmission and reception switching time is S3, S3 cannot be earlier than S0. As another embodiment of the present application, it is also possible to control the power of the transmitted signal after the transceiver is switched, assuming that the end time of the last downlink symbol is S0 and the minimum transmission power of the terminal is limited to P0. In radio frequency control, the terminal transmission power is at S0 It was not greater than P0 before.

As shown in FIG. 13, it is a schematic structural diagram of another terminal provided by an embodiment of the present application in which a terminal switches a transceiver in advance. The transceiver may include: a baseband chip, a radio frequency chip, an antenna switch module, and an antenna. The baseband chip is used for baseband processing. The baseband chip may include: a transceiver timing calculation module and an unscheduled symbol calculation module, and the radio frequency chip may include: a digital-to-analog conversion module, an amplifier, a filter, a mixer, an amplifier, and a filter. The unscheduled symbol calculation module first determines the unscheduled symbol, the baseband chip controls the radio frequency channel of the radio frequency chip to open at S2, the baseband chip sends an antenna transceiver control command to the antenna transceiver module, and the antenna transceiver module starts antenna transceiver switching at S2.

In the embodiment of the present application, the unscheduled symbol time is used to switch the transceiver in advance, thereby reducing the interval time between uplink and downlink switching.

It should be noted that in the embodiment of the present application, the terminal may also receive data from one system and switch to another system to send data. Due to the impact of the switching time, the reception performance is reduced, and the switching may be reduced in the embodiment of the present application time. Another example is the case where the LTE-based system and the NR-based system coexist, and the terminal needs to switch back and forth from the two systems. In this embodiment of the present application, the switching time can be reduced. Another example is the UU port from the base station to the terminal based on the NR system and the PC5 port between the terminal and the terminal. There is a time-division switching scenario, and the switching time can be reduced in the embodiments of the present application.

It should be noted that, for the sake of simple description, the foregoing method embodiments are all expressed as a series of action combinations, but those skilled in the art should know that this application is not limited by the sequence of actions described. Because according to this application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by this application.

To facilitate better implementation of the above solutions of the embodiments of the present application, related devices for implementing the above solutions are also provided below.

Referring to FIG. 14-a, a communication device provided by an embodiment of the present application, the communication device is specifically a first communication device 1400, and the first communication device 1400 includes: a processor 1401, a memory 1402, and a transmitter 1403;

The processor 1401 is configured to determine the end time of the first data and the start time of the second data, and the time period obtained by subtracting the end time of the first data from the start time of the second data is the first In the sending and receiving interval, the first data is sent by a second communication device, and the second data is data to be sent by the first communication device;

The processor 1401 is further configured to determine the sending time of the third data according to the start time and the advance amount of the second data, wherein the advance amount is determined according to the time unit information for transmitting the first data , The third data is the data filled by the first communication device at the front end of the second data, and the time period obtained by subtracting the end time of the first data from the sending time of the third data is the second A transceiver interval, and the second transceiver interval is smaller than the first transceiver interval;

The memory 1402 is used to store data and instructions of the transmitter 1403 and the processor 1401;

The transmitter 1403 is configured to send the third data to the second communication device at the sending time of the third data, and then send to the second communication device at the starting time of the second data The second data.

In some embodiments of the present application, as shown in FIG. 14-b, the first communication device 1400 further includes: a radio frequency transceiver module 1404, where,

The advance amount is used to indicate the advance time length of the transceiver switching in advance;

The processor 1401 is further configured to determine the start of the switching of the transceiver according to the end time of the first data and the advance amount after determining the end time of the first data and the start time of the second data time;

The processor 1401 is also used to control the radio frequency transceiver module to perform transceiver switching at the starting moment of the transceiver switching;

The processor 1401 is further configured to control the transmitter 1403 to send the third data to the second communication device at the sending moment of the third data after the switching of the transceiver is completed, and then The second data is sent to the second communication device at the starting moment of the second data.

In some embodiments of the present application, the processor 1401 is further used to determine the end time of the first data and the start time of the second data, according to the first transceiver interval and the transmission of the first data The cyclic prefix CP length information of the last time unit determines whether the first communication device satisfies the pre-transmit/receive switching condition.

In some embodiments of the present application, the processor 1401 is further configured to: according to the CP length information of the last time unit transmitting the first data when the first communication device satisfies the pre-receive switching condition Determine the advance.

In some embodiments of the present application, the processor 1401 is further configured to acquire the subcarrier interval of the first data and the CP type information of the last time unit transmitting the first data; according to the first The subcarrier interval of the data and the CP type information determine the CP length information of the last time unit transmitting the first data.

In some embodiments of the present application, the processor 1401 is further configured to determine the unscheduled according to the first scheduling information configured by the second communication device after determining the end time of the first data and the start time of the second data For the time unit of the first communication device, the first scheduling information is used to schedule the first data; the advance amount is determined according to the time unit not scheduled for the first communication device.

In some embodiments of the present application, the time unit that is not scheduled to the first communication device and stored in the memory 1402 includes at least one of the following time units:

The processor 1401 is further configured to control the radio frequency transceiver module to switch the transceiver at the end time of the first data when the first data is transmitted through a single carrier or multiple synchronous carriers; when the When the transceiver switching ends, the transmitter 1403 is controlled to send the third data to the second communication device at the sending time of the third data at the end time of the transceiver switching, and then send The second data is sent to the second communication device at the starting moment of the second data.

The processor 1401 is further configured to control the radio frequency transceiver module to switch the transceiver when the first data transmission ends at the latest when the first data is transmitted through multiple asynchronous carriers; When the transceiver switching ends, the transmitter 1403 is controlled to send the third data to the second communication device at the sending time of the third data at the end time of the transceiver switching, and then send Sending the second data to the second communication device at the starting moment of the second data.

In some embodiments of the present application, the transmitter 1403 is further configured to send multi-carrier error information to the second communication device, and the multi-carrier error information is used to indicate a synchronization error time length between multiple carriers .

In some embodiments of the present application, the transmitter 1403 is further configured to send radio frequency capability information to the second communication device, where the radio frequency capability information is used to instruct the first communication device to perform transceiver switching The length of time, and used to indicate whether the first communication device supports transceiver switching in advance.

In some embodiments of the present application, as shown in FIG. 14-c, the first communication device 1400 further includes: a receiver 1405, where,

The receiver 1405 is configured to receive second scheduling information sent by the second communication device, where the second scheduling information includes at least one of the following three parameters: a first scheduling parameter, a second scheduling parameter, and a third A scheduling parameter, the first scheduling parameter is used to indicate a starting moment of the second data, the second scheduling parameter is used to indicate whether the first communication device performs transceiver switching in advance, and the third scheduling The parameter is used to instruct the first communication device to listen to and then speak the LBT parameter;

The processor 1401 is further configured to determine the start time of the second data according to the first scheduling parameter, and determine whether to perform transceiver switching in advance according to the second scheduling parameter, and according to the third Scheduling parameters determine the LBT parameters.

The receiver 1405 is configured to receive third scheduling information sent by the second communication device, where the third scheduling information is used to instruct the first communication device to obtain LBT parameters;

The processor 1401 is further configured to determine that the second communication device indicates that the first communication device obtains LBT parameters;

The processor 1401 is further configured to obtain the LBT parameter according to the first transceiver interval or the second transceiver interval.

In some embodiments of the present application, the sending time of the third data stored in the memory 1402 is later than the ending time of the first data.

In some embodiments of the present application, the processor 1401 is further configured to control the radio frequency transmission power to be less than or equal to a preset transmission power threshold before the end time of the first data arrives.

In some embodiments of the present application, the processor 1401 is further configured to acquire first scheduling information and fourth scheduling information configured by the second communication device, and the first scheduling information is used to schedule the first Data, the fourth scheduling information is used to schedule the second data;

The processor 1401 is further configured to determine the end time of the first data according to the time domain information indication of the first scheduling information; and, according to the time domain information indication and preset timing of the fourth scheduling information The advance information TA determines the start time of the second data.

In some embodiments of the present application, the third data stored in the memory 1402 is a piece of data copied from the second data, or a random number, or a reference signal, and the length of the third data is equal to The advance.

It should be noted that the information interaction and execution process between the modules/units of the above device are based on the same concept as the method embodiment of the present application, and the technical effects brought by the same are the same as the method embodiment of the present application, and the specific content can be Please refer to the description in the method embodiment shown in the foregoing of the present application, which will not be repeated here.

An embodiment of the present application further provides a computer storage medium, wherein the computer storage medium stores a program, and the program executes some or all of the steps described in the foregoing method embodiments.

Next, another first communication device provided by an embodiment of the present application is introduced. Referring to FIG. 15, the first communication device 1500 includes:

The receiver 1501, the transmitter 1502, the processor 1503, and the memory 1504 (wherein the number of the processor 1503 in the first communication device 1500 may be one or more, and one processor is taken as an example in FIG. 15). In some embodiments of the present application, the receiver 1501, the transmitter 1502, the processor 1503, and the memory 1504 may be connected by a bus or other means, and FIG. 15 takes the connection by a bus as an example.

The memory 1504 may include a read-only memory and a random access memory, and provide instructions and data to the processor 1503. A part of the memory 1504 may also include a non-volatile random access memory (non-volatile random access memory, NVRAM). The memory 1504 stores an operating system and operation instructions, executable modules or data structures, or a subset thereof, or an extended set thereof, where the operation instructions may include various operation instructions for implementing various operations. The operating system may include various system programs for implementing various basic services and processing hardware-based tasks.

The processor 1503 controls the operation of the first communication device. The processor 1503 may also be referred to as a central processing unit (central processing unit, CPU). In a specific application, each component of the first communication device is coupled together through a bus system, where the bus system may include a power bus, a control bus, and a status signal bus, in addition to a data bus. However, for the sake of clarity, various buses are called bus systems in the figure.

The method disclosed in the above embodiments of the present application may be applied to the processor 1503 or implemented by the processor 1503. The processor 1503 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 1503 or an instruction in the form of software. The processor 1503 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or Other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application may be implemented or executed. The general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied and executed by a hardware decoding processor, or may be executed and completed by a combination of hardware and software modules in the decoding processor. The software module may be located in a mature storage medium in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, and registers. The storage medium is located in the memory 1504. The processor 1503 reads the information in the memory 1504 and completes the steps of the above method in combination with the hardware.

The receiver 1501 can be used to receive input digital or character information, and generate signal input related to the settings and function control of the first communication device. The transmitter 1502 can include a display device such as a display screen, and the transmitter 1502 can be used to connect through an external interface Output number or character information.

In the embodiment of the present application, the processor 1503 is configured to execute the foregoing data transmission method implemented by the first communication device.

In another possible design, when the first communication device is a chip in the terminal, the chip includes: a processing unit and a communication unit, the processing unit may be, for example, a processor, and the communication unit may be, for example, input/output Interfaces, pins or circuits, etc. The processing unit can execute the computer execution instructions stored in the storage unit, so that the chip in the terminal executes the wireless communication method of any one of the first aspect. Optionally, the storage unit is a storage unit in the chip, such as a register, a cache, etc. The storage unit may also be a storage unit in the terminal outside the chip, such as a read-only memory (read -only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (random access memory, RAM), etc.

Wherein, the processor mentioned in any of the above may be a general-purpose central processing unit, a microprocessor, an ASIC, or one or more integrated circuits for controlling the execution of the program of the above data transmission method.

In addition, it should be noted that the device embodiments described above are only schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be The physical unit can be located in one place or can be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the drawings of the device embodiments provided in the present application, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software plus necessary general-purpose hardware. Of course, dedicated hardware can also include dedicated integrated circuits, dedicated CPUs, dedicated memories, Special components and so on. In general, all functions completed by computer programs can be easily implemented with corresponding hardware, and the specific hardware structure used to achieve the same function can also be diverse, such as analog circuits, digital circuits, or dedicated Circuit etc. However, for the present application, software program implementation is a better embodiment in more cases. Based on such an understanding, the technical solution of the present application can essentially be embodied in the form of a software product that contributes to the existing technology, and the computer software product is stored in a readable storage medium, such as a computer floppy disk , U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk, etc., including several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present application .

In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product.

The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server or data center Transmit to another website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be stored by a computer or a data storage device including a server, a data center, and the like integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, Solid State Disk (SSD)), or the like.

Claims

A data transmission method, characterized in that it includes:

The first communication device determines the end time of the first data and the start time of the second data. The time period obtained by subtracting the end time of the first data from the start time of the second data is the first transceiver interval. The first data is sent by a second communication device, and the second data is data to be sent by the first communication device;

The first communication device determines the transmission time of the third data according to the start time and the advancement amount of the second data, wherein the advancement amount is determined according to the time unit information for transmitting the first data, and the third The data is the data filled by the first communication device at the front end of the second data, and the time period obtained by subtracting the end time of the first data from the sending time of the third data is the second sending and receiving interval, and The second sending and receiving interval is smaller than the first sending and receiving interval;

The first communication device sends the third data to the second communication device at the sending time of the third data, and then sends the third data to the second communication device at the starting time of the second data Second data.
The method according to claim 1, wherein the advance amount is used to indicate a length of advance time for a transceiver switch in advance;

After the first communication device determines the end time of the first data and the start time of the second data, the method further includes:

The first communication device determines the start time of switching of the transceiver according to the end time of the first data and the advance amount;

The first communication device performs transceiver switching at the starting moment of the transceiver switching;

When the switching of the transceiver is completed, the following steps are triggered: the first communication device sends the third data to the second communication device at the moment of sending the third data, and then sends the third data The second data is sent to the second communication device at the beginning of the data.
The method according to claim 2, wherein after the first communication device determines the end time of the first data and the start time of the second data, the method further comprises:

The first communication device determines whether the first communication device satisfies the pre-transmission switching condition according to the first transceiving interval and the cyclic prefix CP length information of the last time unit transmitting the first data.
The method of claim 3, further comprising:

When the first communication device satisfies the early transmission/reception switching condition, the first communication device determines the advance amount according to the CP length information of the last time unit transmitting the first data.
The method according to claim 1 or 2, wherein after the first communication device determines the end time of the first data and the start time of the second data, the method further comprises:

The first communication device determines a time unit not scheduled to the first communication device according to the first scheduling information configured by the second communication device, and the first scheduling information is used to schedule the first data;

The first communication device determines the advancement according to a time unit not scheduled to the first communication device.
The method according to any one of claims 1 to 5, wherein when the first data is transmitted through a single carrier or multiple synchronization carriers, the method further includes:

The first communication device switches the transceiver at the end time of the first data;

When the switching of the transceiver ends, the first communication device sends the third data to the second communication device at the end of the switching of the transceiver, and then at the beginning of the second data Sending the second data to the second communication device at any time.
The method according to any one of claims 1 to 5, wherein when the first data is transmitted through multiple non-synchronized carriers, the method further comprises:

The first communication device switches the transceiver when the transmission of the first data ends at the latest;

When the switching of the transceiver ends, the first communication device sends the third data to the second communication device at the end of the switching of the transceiver, and then at the beginning of the second data Sending the second data to the second communication device at any time.
The method according to any one of claims 1 to 7, wherein the method further comprises:

The first communication device receives third scheduling information sent by the second communication device, where the third scheduling information is used to instruct the first communication device to obtain LBT parameters;

The first communication device determines that the second communication device instructs the first communication device to obtain the LBT parameter;

The first communication device acquires the LBT parameter according to the first transceiver interval or the second transceiver interval.
The method according to any one of claims 1 to 8, wherein the first communication device determining the end time of the first data and the start time of the second data includes:

The first communication device obtains first scheduling information and fourth scheduling information configured by the second communication device, the first scheduling information is used for scheduling the first data, and the fourth scheduling information is used for scheduling Describe the second data;

The first communication device determines the end time of the first data according to the time domain information indication of the first scheduling information; and,

The first communication device determines the start time of the second data according to the time domain information indication of the fourth scheduling information and preset timing advance information TA.
The method according to any one of claims 1 to 9, wherein the third data is a piece of data copied from the second data, or a random number, or a reference signal, the third The length of the data is equal to the amount of advance.
A communication device, characterized in that the communication device is specifically a first communication device, and the first communication device includes: a processor, a memory, and a transmitter;

The processor is configured to determine the end time of the first data and the start time of the second data, and the time period obtained by subtracting the end time of the first data from the start time of the second data is the first transceiver At intervals, the first data is sent by a second communication device, and the second data is data to be sent by the first communication device;

The processor is further configured to determine the sending time of the third data according to the starting time and the advance amount of the second data, wherein the advance amount is determined according to the time unit information for transmitting the first data, The third data is the data filled by the first communication device at the front end of the second data, and the time period obtained by subtracting the end time of the first data from the sending time of the third data is the second sending and receiving Interval, and the second transceiver interval is smaller than the first transceiver interval;

The memory is used to store data and instructions of the transmitter and the processor;

The transmitter is configured to send the third data to the second communication device at the sending time of the third data, and then send the data to the second communication device at the starting time of the second data The second data.
The communication device according to claim 11, wherein the first communication device further comprises: a radio frequency transceiver module, wherein,

The advance amount is used to indicate the advance time length of the transceiver switching in advance;

The processor is further configured to determine the start time of switching the transceiver according to the end time of the first data and the advance amount after determining the end time of the first data and the start time of the second data ;

The processor is also used to control the radio frequency transceiver module to switch the transceiver at the start time of the transceiver switching;

The processor is further configured to control the transmitter to send the third data to the second communication device at the sending moment of the third data after the switching of the transceiver is completed, and then The second data is sent to the second communication device at the starting moment of the second data.
The communication device according to claim 12, wherein the processor is further configured to determine the end time of the first data and the start time of the second data, according to the first transceiver interval and transmit the The cyclic prefix CP length information of the last time unit of the first data determines whether the first communication device meets the pre-transmit and receive switching conditions.
The communication device according to claim 13, wherein the processor is further configured to, according to the last time unit for transmitting the first data, when the first communication device satisfies the pre-transmit/receive switching condition The CP length information determines the advance.
The communication device according to claim 11 or 12, wherein the processor is further configured to determine after the end time of the first data and the start time of the second data, according to the configuration of the second communication device The first scheduling information determines a time unit not scheduled to the first communication device, and the first scheduling information is used to schedule the first data; the advance is determined according to the time unit not scheduled to the first communication device the amount.
The communication device according to any one of claims 11 to 15, wherein the first communication device further comprises: a radio frequency transceiver module, wherein,

The processor is further configured to control the radio frequency transceiver module to switch the transceiver at the end of the first data when the first data is transmitted through a single carrier or multiple synchronous carriers; when the transceiver When the switchover of the transceiver is completed, the transmitter is controlled to send the third data to the second communication device at the end time of the switchover of the transceiver, and then to the second communication device at the start time of the second data The second communication device sends the second data.
The communication device according to any one of claims 11 to 15, wherein the first communication device further comprises: a radio frequency transceiver module, wherein,

The processor is further configured to control the radio frequency transceiver module to switch the transceiver at the latest time when the transmission of the first data ends when the first data is transmitted through multiple asynchronous carriers; When the transceiver switching ends, the transmitter is controlled to send the third data to the second communication device at the end of the transceiver switching, and then to the second communication device at the beginning of the second data The second communication device sends the second data.
The communication device according to any one of claims 11 to 17, wherein the first communication device further comprises: a receiver, wherein,

The receiver is configured to receive third scheduling information sent by the second communication device, where the third scheduling information is used to instruct the first communication device to obtain LBT parameters;

The processor is further configured to determine that the second communication device instructs the first communication device to obtain the LBT parameter;

The processor is further configured to acquire the LBT parameter according to the first transceiver interval or the second transceiver interval.
The communication device according to any one of claims 11 to 18, wherein the processor is further configured to acquire first scheduling information and fourth scheduling information configured by the second communication device, and the first One piece of scheduling information is used to schedule the first data, and the fourth piece of scheduling information is used to schedule the second data;

The processor is further configured to determine the end time of the first data according to the time domain information indication of the first scheduling information; and, according to the time domain information indication and preset timing advance of the fourth scheduling information The information TA determines the start time of the second data.
The communication device according to any one of claims 11 to 19, wherein the third data stored in the memory is a piece of data copied from the second data, or a random number, or a reference Signal, the length of the third data is equal to the advance.
A computer-readable storage medium including instructions, which when executed on a computer, causes the computer to execute the method according to any one of claims 1-10.
A computer program product containing instructions that, when run on a computer, causes the computer to perform the method of any one of claims 1-10.