CN111771410B

CN111771410B - Data transmission method and communication equipment

Info

Publication number: CN111771410B
Application number: CN201880090224.2A
Authority: CN
Inventors: 王俊伟
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2023-03-24
Anticipated expiration: 2038-12-29
Also published as: WO2020133340A1; CN111771410A

Abstract

A data transmission method and a communication device. The method comprises the following steps: the method comprises the steps that first communication equipment determines the end time of first data and the start time of second data, the time period obtained by subtracting the end time of the first data from the start time of the second data is a first transceiving interval, the first data is sent by the second communication equipment, and the second data is data to be sent of the first communication equipment; the first communication equipment determines the sending time of third data according to the starting time and the lead of the second data, the lead is determined according to the time unit information for transmitting the first data, the third data is the data filled in the front end of the second data by the first communication equipment, the time period obtained by subtracting the ending time of the first data from the sending time of the third data is a second transceiving interval, and the second transceiving interval is smaller than the first transceiving interval; the first communication device transmits the third data to the second communication device at the transmission timing of the third data, and then transmits the second data to the second communication device at the start timing of the second data.

Description

Data transmission method and communication equipment

Technical Field

The embodiment of the application relates to the field of communication, in particular to a data transmission method and communication equipment.

Background

With the development of mobile broadband (MBB) services, users have increasingly demanded wireless network bandwidth and throughput. In order to better utilize unlicensed spectrum resources and provide higher service rate and better user experience for terminal users, an unlicensed (un-licensed) spectrum-based access technology is introduced into a Long Term Evolution (LTE) system and a New Radio (NR) system.

With respect to the exclusive property of licensed (licensed) spectrum, the unlicensed spectrum has a shared property, that is, as long as an access node complying with a certain regulation can receive and transmit data using the spectrum, the access node may include: a base station and a User Equipment (UE). In order to enable each access node to achieve better coexistence, after an unlicensed spectrum is introduced by an LTE system and an NR system, a Listen Before Talk (LBT) mechanism is adopted, that is, any access node needs to monitor a channel to be transmitted before transmitting data, and only when the channel is in an idle state, data transmission can be performed, otherwise, monitoring needs to be continued.

After the current LBT is successful, the base station acquires a Channel Occupancy Time (COT), and can send downlink data from the base station to the terminal in the time period, and simultaneously send an instruction to the UE, so that the UE can send uplink data by using a time-frequency resource corresponding to the COT. Although the base station can notify the UE of the obtained time-frequency resource corresponding to the COT, the UE transmits uplink data from the time when receiving the notification signaling, and there is a gap (gap) time in between.

The above interval time is a signal blank period, i.e. neither the base station nor the UE transmits a signal. If the length of the interval time is set too large, the risk of losing the channel is increased, so that the stability of system communication is insufficient, and meanwhile, the predictability of data scheduling is reduced. In addition, there is a possibility that other neighboring cells or transmission nodes of different systems acquire the right to transmit data in the interval time and transmit signals on the same channel, which also causes mutual interference to uplink signals.

Disclosure of Invention

The embodiment of the application provides a data transmission method and communication equipment, which are used for reducing the length of interval time, reducing the risk of losing channels and reducing possible generated channel interference.

In order to solve the above technical problem, an embodiment of the present application provides the following technical solutions:

in a first aspect, an embodiment of the present application provides a data transmission method, including: the method comprises the steps that first communication equipment determines the end time of first data and the start time of second data, the time period obtained by subtracting the end time of the first data from the start time of the second data is a first transceiving interval, the first data is sent by second communication equipment, and the second data is data to be sent of the first communication equipment; the first communication device determines a sending time of third data according to a starting time and an advance of the second data, wherein the advance is determined according to time unit information for transmitting the first data, the third data is data filled in the front end of the second data by the first communication device, a time period obtained by subtracting an ending time of the first data from the sending time of the third data is a second transceiving interval, and the second transceiving interval is smaller than the first transceiving interval; the first communication device transmits the third data to the second communication device at the transmission time of the third data, and then transmits the second data to the second communication device at the start time of the second data.

In this embodiment of the application, a first communication device first determines 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 is a first transceiving interval, the first data is sent by a second communication device, the second data is data to be sent by the first communication device, the first communication device next determines a sending time of third data according to the start time and an advance of the second data, the advance is determined according to time unit information for transmitting the first data, the third data is data filled 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 sending time of the third data is a 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 time of the third data, and then sends the second data to the second communication device at the start time of 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, in this embodiment, the second transceiving interval is smaller than the first transceiving interval, that is, the interval time from receiving the first data to sending the third data is shorter than the interval time from receiving the first data to sending the second data, which reduces the length of the interval time of uplink and downlink switching, thereby ensuring the stability of system communication and the predictability of data scheduling.

In one possible implementation manner of the first aspect, the advance amount is used to indicate an advance time length for advancing transceiver switching; the first communication device determines that the end time of the first data and the start time of the second data are later, and the method further comprises: the first communication equipment determines the starting time of the transceiver switching according to the ending time of the first data and the advance; the first communication equipment performs transceiver switching at the starting moment of the transceiver switching; when the transceiver switch is finished, triggering to execute the following steps: the first communication device transmits the third data to the second communication device at the transmission time of the third data, and then transmits the second data to the second communication device at the start time of the second data. The advance can be used to indicate the length of advance time for advancing the transceiver switching, after the first communication device obtains the advance, the transceiver switching is performed in advance according to the advance determined on the basis of the end time of the first data, and the start time advanced on the basis of the end time of the first data is determined as the start time of the transceiver switching. The first communication device performs the transceiver switching at the starting time of the transceiver switching, that is, the embodiment of the application realizes the transceiver switching in advance compared with the prior art.

In one 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: and the first communication equipment determines whether the first communication equipment meets an advanced transceiving switching condition according to the first transceiving interval and the Cyclic Prefix (CP) length information of the last time unit for transmitting the first data. In this embodiment, the first communication device may further preset a condition for switching transceiver in advance, where the condition for switching transceiver in advance is a determination condition for determining whether transceiver switching can be performed in advance. According to the embodiment of the invention, after the condition of switching receiving and sending in advance can be set, the first communication equipment acquires the first receiving and sending interval and the CP length information of the last time unit for transmitting the first data, and determines whether the condition of switching receiving and sending in advance is met according to the first receiving and sending interval and the CP length. For example, the condition for switching transmission and reception in advance may include a threshold, and if a difference obtained by subtracting the CP length from the first transmission and reception interval is smaller than the threshold, it may be determined that the first communication device satisfies the condition for switching transmission and reception in advance, and if a difference obtained by subtracting the CP length from the first transmission and reception interval is greater than or equal to the threshold, it may be determined that the first communication device does not satisfy the condition for switching transmission and reception in advance.

In one possible implementation manner of the first aspect, the method further includes: and when the first communication equipment meets the condition of switching the receiving and sending in advance, the first communication equipment determines the advance according to the CP length information of the last time unit for transmitting the first data. When the first communication device satisfies the condition of switching between early transceiving and receiving, the advance amount may be determined according to the CP length of the last time unit in which the first data is transmitted, for example, the first communication device may set the advance amount d to be d = CP length, or d =3/4CP length, or d =1/2 CP length. The first communication device may determine the relationship between the advance amount and the CP length according to a specific scenario as long as the advance transceiving switching condition can be satisfied.

In one possible implementation manner of the first aspect, the method further includes: the first communication equipment acquires the subcarrier interval of the first data and the CP type information of the last time unit for transmitting the first data; and the first communication equipment determines CP length information of the last time unit for 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 for transmitting the first data acquired by the first communication device may include: a normal cyclic prefix length of 4.7us and an extended cyclic prefix length of 16.67us. The first communication device determines CP length information of a last time unit of transmitting the first data according to the subcarrier spacing and the CP type information of the first data.

In one 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 equipment determines a time unit which is not scheduled to the first communication equipment according to first scheduling information configured by the second communication equipment, wherein the first scheduling information is used for scheduling the first data; the first communication device determines the advance based on time units not scheduled to the first communication device. Before the second communication device sends the first data, the second communication device sends 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 time units not scheduled to the first communication device according to the first scheduling information, the time units not scheduled to the first communication device being time units in which no data is transmitted to the first communication device at the end of the time unit in which the first data is transmitted, e.g., the end within the last symbol in which the first data is transmitted. The first communication device determines the advance according to the time unit not scheduled to the first communication device, for example, the advance in step 202 may not be greater than the time unit not scheduled to the first communication device, and the first communication device may perform transceiver switching in advance according to the advance, thereby reducing the length of the interval time of uplink and downlink switching, and ensuring the stability of system communication and the predictability of data scheduling.

In one possible implementation manner of the first aspect, the time unit not scheduled to the first communication device includes at least one of the following time units: a time unit in which data is not scheduled to the first communication device, a time unit in which data that the first communication device has received is scheduled, and a time unit in which data is scheduled to other communication devices other than the first communication device. Wherein not scheduling data to the first communication device means that the second communication device does not transmit data to the first communication device, and a time unit in which data that the first communication device has received is scheduled means a time unit in which the first communication device repeatedly receives data. A time unit that schedules data to a communication device other than 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, the time unit is still a time unit that is not scheduled to the first communication device, and the time unit that schedules data to other communication devices other than the first communication device can be used for determining the advance.

In one possible implementation manner of the first aspect, when the first data is transmitted over a single carrier or multiple synchronization carriers, the method further includes: the first communication device performs transceiver switching at the end time of the first data; when the transceiver switching is finished, the first communication device transmits the third data to the second communication device at the end time of the transceiver switching, and then transmits the second data to the second communication device at the start time of the second data. The first communication device initiates a transceiver handoff at the end of the first data. The end time of the transceiver switching is the sending time of the third data, the first communication device sends the third data to the second communication device at the end time of the transceiver switching, and then sends the second data to the second communication device at the start time of the second data. Therefore, the receiving and sending interval can be reduced to the time (such as 13 us) for switching the hardware of the radio frequency transceiver, and the method is applicable to the scene of one carrier or the scene of a plurality of synchronous carriers, wherein the plurality of synchronous carriers can be carriers under the same network system.

In one possible implementation manner of the first aspect, when the first data is transmitted over a plurality of non-synchronized carriers, the method further includes: the first communication equipment switches the transceiver at the latest finishing moment of transmitting the first data; when the transceiver switching is finished, the first communication device transmits the third data to the second communication device at the end time of the transceiver switching, and then transmits the second data to the second communication device at the start time of the second data. When the downlink synchronization between the multiple carriers has errors, the transceiver can be switched after the latest carrier receives the first data. When the current system is in a plurality of carriers, especially when the first communication equipment end can not ensure signal receiving synchronization, the radio frequency transceiving conversion can be started after the first data of the last carrier of the time synchronization is received, and the lag time depends on the timing error of the carrier. By using the transceiver switching in advance in the embodiment of the application, the interval time of uplink and downlink switching can be well reduced, the risk of losing channels is reduced, and the efficiency of system data transmission is improved.

In one 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, wherein the multi-carrier error information is used for indicating the time length of synchronization errors among a plurality of carriers. The first communication device may also report a synchronization error between multiple carriers to the second communication device, for example, the first communication device sends multicarrier error information, where the multicarrier error information may include: synchronization error of each carrier.

In one 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, wherein the radio frequency capability information is used for indicating the time length of the first communication device for executing transceiver switching and indicating whether the first communication device supports transceiver switching in advance. In order to better schedule and transmit data between the first communication device and the second communication device, the first communication device further needs to interact with the second communication device, the first communication device sends radio frequency capability information to the second communication device, and the radio frequency capability information is used for indicating the time length of the first communication device for executing transceiver switching and indicating whether the first communication device supports transceiver switching in advance.

In one 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, where the second scheduling information includes at least one of the following three parameters: the first scheduling parameter is used for indicating the starting time of the second data, the second scheduling parameter is used for indicating whether the first communication equipment carries out transceiver switching in advance, and the third scheduling parameter is used for indicating the Listen Before Talk (LBT) parameter of the first communication equipment; the first communication device determines the starting time of the second data according to the first scheduling parameter, determines whether to perform transceiver switching in advance according to the second scheduling parameter, and determines the LBT parameter according to the third scheduling parameter. In this embodiment of the application, of the three scheduling parameters sent by the second communication device, the first scheduling parameter is used to indicate a start time 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 method for shortening the GAP time, where a value of the second scheduling parameter is 0 indicates that GAP time reduction is not performed, and a value of the second scheduling parameter is 1 indicates that GAP reduction is performed. The third scheduling parameter may indicate an LBT access type, if the third scheduling parameter takes the value 00, it indicates that there is no LBT, that is, the third scheduling parameter is sent directly, if the third scheduling parameter takes the value 01, it indicates that LBT CAT2 is made, if the third scheduling parameter takes the value 10, it indicates that LBT CAT4 is made, and if the third scheduling parameter takes the value 11, it indicates that a reserved field is reserved.

In one 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, wherein the third scheduling information is used for indicating that the first communication device obtains an LBT parameter; the first communication device determining that the second communication device indicates acquisition of the LBT parameter by the first communication device; the first communication device acquires the LBT parameter according to the first transceiving interval or the second transceiving interval. In this 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 the LBT to be the type that the first communication device obtains the LBT parameter by itself, that is, at this time, the second communication device does not indicate the specific LBT parameter to the first communication device any more, and the third scheduling information is used to indicate that the first communication device obtains the LBT parameter. After receiving the third scheduling information, the first communication device determines that the first communication device determines the type of LBT itself, and the first communication device may calculate the possible transceiving interval of the uplink and downlink data, and perform corresponding LBT according to the actual transceiving interval. For example, the enabled transceiving interval is not greater than 16us, and the first communication device may not perform LBT and directly transmit uplink data at the scheduled time. And if the transceiving interval can be more than 16us and less than 25us, the first communication device can select LBT cat2. Here, the transmission/reception interval that can be achieved may be the time of the first transmission/reception interval determined by the first communication device, or may be the time of the second transmission/reception interval determined by the first communication device.

In a possible implementation manner of the first aspect, the third data is transmitted later than the end time of the first data. If the time after the first communication device performs the transceiver handover is earlier than the end time of the first data, in order to reduce interference to other users caused by the first communication device transmitting the third data, it is necessary to control the transmission time of the third data not to be earlier than the end time of the first data.

In one possible implementation manner of the first aspect, the method further includes: and before the ending time of the first data is reached, the first communication equipment controls the radio frequency transmission power to be less than or equal to a preset transmission power threshold value. If the time after the first communication device performs the transceiver handover is earlier than the end time of the first data, the first communication device needs to control the power of the transmission signal after performing the transceiver handover in order to reduce interference to other users caused by the first communication device transmitting the third data.

In one possible implementation manner of the first aspect, the determining, by the first communication device, an end time of the first data and a 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, wherein the first scheduling information is used for scheduling the first data, and the fourth scheduling information is used for scheduling the second data; the first communication equipment determines the ending moment of the first data according to the time domain information indication of the first scheduling information; and the first communication equipment determines the starting 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, wherein the first scheduling information is used for scheduling first data, and the fourth scheduling information is used for scheduling second data. The first communication device first determines a time corresponding to a time slot (or symbol) boundary of the second communication device according to the synchronization signal, the first scheduling information indicates a starting time slot (or symbol) occupied by the first data and the number of symbols occupied by the first data, the time domain information of the first scheduling information indicates a time corresponding to the time slot (or symbol) boundary, the starting time slot (or symbol) and the number of symbols occupied by the data, and the first communication device determines an ending time of the first data according to the time domain information. 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, determines the transmission time as t0 according to the fourth scheduling information indicating the start time slot (or symbol) occupied by the second data and the number of symbols occupied by the second data, and calculates the start time S1= t0-TA of the second data according to the preset timing advance information TA. The first transceiving interval = S1-S0.

In a possible implementation manner of the first aspect, the third data is a segment of data copied from the second data, or a random number, or a reference signal, and a length of the third data is equal to the advance. And copying a section of data from the second data as third data, wherein the length of the third data is equal to the advance. In order to reduce the problem of inter-symbol interference caused by channel multipath, CP technology may be introduced in the communication system, that is, a CP header may be added to the first time unit for transmitting the second data, where the CP header may be a piece of data copied from the tail of the second data. For example, the third data is a segment of data copied from the second data, the copied third data can form a new CP with an original CP of the second data, and the third data in this embodiment of the application may be a segment of data located before and adjacent to a tail of the second data in the second data. In addition, the embodiment of the application can send the reference signal before sending the second data, so that the receiving end can increase resources for channel estimation by sending the reference signal, the channel estimation result is more accurate, and the receiving performance of the receiving end is promoted.

In a second aspect, an embodiment of the present application further provides a communication device, where 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 an end time of first data and a start time of second data, where a time period obtained by subtracting the end time of the first data from the start time of the second data is a first transceiving interval, the first data is sent by a second communication device, and the second data is data to be sent of the first communication device; the processor is further configured to determine a sending time of the third data according to a start time and an advance of the second data, where the advance is determined according to time unit information for transmitting the first data, the third data is data filled at a front end of the second data by the first communication device, a time period obtained by subtracting an end time of the first data from the sending time of the third data is a second transceiving interval, and the second transceiving interval is smaller than the first transceiving interval; the memory for storing data and instructions for the transmitter and the processor; the transmitter is configured to transmit the third data to the second communication device at the transmission time of the third data, and then transmit the second data to the second communication device at the start time of the second data.

In a possible implementation manner of the second aspect, the first communication device further includes: the radio frequency transceiving module is used for indicating the length of the advance time for switching the transceiver in advance; the processor is further configured to determine, after determining an end time of first data and a start time of second data, a start time of the transceiver switching according to the end time of the first data and the advance; the processor is further configured to control the radio frequency transceiver module to perform transceiver switching at an initial time of the transceiver switching; the processor is further configured to control the transmitter to transmit the third data to the second communication device at a transmission time of the third data and then transmit the second data to the second communication device at a start time of the second data after the transceiver is switched to the end.

In a possible implementation manner of the second aspect, the processor is further configured to determine whether the first communication device satisfies an advanced transceiving switching condition according to the first transceiving interval and cyclic prefix CP length information of a last time unit in which the first data is transmitted after determining an end time of the first data and a start time of the second data.

In a possible implementation manner of the second aspect, the processor is further configured to determine the advance amount according to CP length information of a last time unit for transmitting the first data when the first communication device satisfies the advanced transceiving switching condition.

In a possible implementation manner of the second aspect, the processor is further configured to obtain a subcarrier interval of the first data and CP type information of a last time unit in which the first data is transmitted; and determining CP length information of the last time unit for 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 second aspect, the processor is further configured to determine, after determining an end time of first data and a start time of second data, a time unit that is not scheduled to the first communication device according to first scheduling information configured by the second communication device, where the first scheduling information is used to schedule the first data; determining the advance based on time units not scheduled to the first communication device.

In one possible implementation manner of the second aspect, the time units stored by the memory and not scheduled to the first communication device include at least one of the following time units: a time unit in which data is not scheduled to the first communication device, a time unit in which data that the first communication device has received is scheduled, and a time unit in which data is scheduled 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: the processor is further configured to control the radio frequency transceiver module to perform transceiver switching at an end time of the first data when the first data is transmitted through a single carrier or multiple synchronous carriers; when the transceiver switch is over, controlling the transmitter to transmit the third data to the second communication device at the end time of the transceiver switch, and then to transmit the second data to the second communication device at the start time 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 control the radio frequency transceiver module to perform transceiver switching at a time when transmission of the first data is finished at the latest when the first data is transmitted through a plurality of asynchronous carriers; and when the transceiver switching is finished, controlling the transmitter to transmit the third data to the second communication device at the finishing moment of the transceiver switching and then transmit 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 transmit multicarrier error information to the second communication device, where the multicarrier error information is used to indicate a synchronization error time length between multiple carriers.

In a possible implementation manner of the second aspect, the transmitter is further configured to transmit, to the second communication device, radio frequency capability information, where the radio frequency capability information is used to indicate a length of time for which the first communication device performs transceiver switching, and is used to indicate whether the first communication device supports transceiver switching in advance.

In one 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 communications device, and the second scheduling information includes at least one of the following three parameters: the first scheduling parameter is used for indicating the starting time of the second data, the second scheduling parameter is used for indicating whether the first communication equipment carries out transceiver switching in advance, and the third scheduling parameter is used for indicating the Listen Before Talk (LBT) parameter of the first communication equipment; the processor is further configured to determine a start time of the second data according to the first scheduling parameter, determine whether to perform transceiver handover in advance according to the second scheduling parameter, and determine the LBT parameter according to the third scheduling parameter.

In one possible implementation manner of the second aspect, the first communication device further includes: a receiver, configured to receive third scheduling information sent by the second communications device, where the third scheduling information is used to instruct the first communications device to acquire LBT parameters; the processor is further configured to determine that the second communication device indicates acquisition of the LBT parameter by the first communication device; the processor is further configured to obtain the LBT parameter according to the first transceiving interval or the second transceiving interval.

In one possible implementation manner of the second aspect, the memory stores the third data with a transmission time later than an end time of the first data.

In a possible implementation manner of the second aspect, the processor 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 is reached.

In a possible implementation manner of the second aspect, the processor is further configured to obtain first scheduling information and fourth scheduling information configured by the second communications device, where the first scheduling information is used to schedule the first data, and the fourth scheduling information is used to schedule the second data; the processor is further configured to determine an end time of the first data according to a time domain information indication of the first scheduling information; and determining the starting 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 a length of the third data is equal to the advance.

In a second aspect of the present application, the constituent modules of the first communication device may further 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.

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

In a fourth aspect, embodiments of the present application provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the first aspect.

In a fifth aspect, an embodiment of the present application provides a communication device, where the communication device may include an entity such as a terminal device or a chip, and the communication device includes: a processor, a memory; the memory is to store instructions; the processor is configured to execute the instructions in the memory to cause the communication device to perform the method of any of the preceding first aspects.

In a sixth aspect, the present application provides a chip system comprising a processor for enabling a communication device to implement the functions referred to in the above aspects, e.g. to transmit or process data and/or information referred to in the above methods. In one possible design, the system-on-chip further includes a memory for storing program instructions and data necessary for the communication device. The chip system may be formed by a chip, or may include a chip and other discrete devices.

Drawings

Fig. 1 is a schematic diagram of a system architecture applied to a data transmission method according to an embodiment of the present application;

fig. 2 is a schematic block diagram of a flow chart of a data transmission method applied to a first communication device according to an embodiment of the present application;

fig. 3 is a schematic diagram illustrating a transmission sequence of first data, second data, and third data according to an embodiment of the present application;

fig. 4 is a schematic diagram of transceiver switching in a scenario of multiple non-synchronous carrier transmissions according to an embodiment of the present application;

fig. 5 is a schematic flowchart of a data transmission method implemented based on a terminal according to an embodiment of the present application;

fig. 6 is a schematic diagram of transceiver handover in advance in the embodiment of the present application;

fig. 7 is a schematic structural diagram of a terminal in which a terminal performs transceiver switching in advance according to an embodiment of the present application;

FIG. 8 is a diagram illustrating data stuffing in a transmission symbol according to an embodiment of the present application;

FIG. 9 is a diagram of supplemented complete data provided by an embodiment of the present application;

fig. 10 is a schematic flowchart of another data transmission method implemented based on a terminal according to an embodiment of the present application;

fig. 11 is a schematic diagram illustrating an advanced transceiving switching by using an unscheduled symbol according to an embodiment of the present application;

fig. 12 is a schematic diagram illustrating determining an unscheduled downlink symbol according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of another terminal for performing transceiver handover in advance in the terminal according to the embodiment of the present application;

fig. 14-a is a schematic structural diagram of a first communications device according to an embodiment of the present application;

fig. 14-b is a schematic structural diagram of another first communication device provided in the embodiment of the present application;

fig. 14-c is a schematic structural diagram of another first communication device provided in the embodiment of the present application;

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

Detailed Description

The embodiment of the application provides a data transmission method and communication equipment, which are used for reducing the length of interval time and reducing the risk of losing channels.

Embodiments of the present application are described below with reference to the accompanying drawings.

The terms "first," "second," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and are merely descriptive of the various embodiments of the application and how objects of the same nature can be distinguished. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The technical solution of the embodiment of the present application may be applied to various data processing communication systems, such as Code Division Multiple Access (CDMA), time Division Multiple Access (TDMA), frequency Division Multiple Access (FDMA), orthogonal Frequency Division Multiple Access (OFDMA), single carrier frequency division multiple access (SC-FDMA), non-orthogonal multiple access (NOMA) systems, and the like. The term "system" may be used interchangeably with "network". CDMA systems may implement wireless technologies such as Universal Terrestrial Radio Access (UTRA), CDMA2000, and the like. UTRA may include Wideband CDMA (WCDMA) technology and other CDMA variant technologies. CDMA2000 may cover the Interim Standard (IS) 2000 (IS-2000), IS-95 and IS-856 standards. TDMA systems may implement wireless technologies such as global system for mobile communications (GSM). The OFDMA system may implement wireless technologies such as evolved universal terrestrial radio access (E-UTRA), ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, flash OFDMA, etc. UTRA and E-UTRA are UMTS as well as UMTS evolved versions. Various versions of 3GPP are new versions of UMTS using E-UTRA in Long Term Evolution (LTE) and LTE-based evolution. The fifth generation (5 generation,5 g) communication system, the sixth generation (6 generation,6 g) communication system, and the New Radio (NR) are the next generation communication systems under study. In addition, the communication system can also be applied to future-oriented communication technologies, and all the technical solutions provided by the embodiments of the present application are applied. The system architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

The communication system provided by the embodiment of the application at least comprises: 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 device and the terminal device may be transmitted by radio waves, or may be transmitted by visible light, laser, infrared, optical quantum, power lines, optical fibers, coaxial cables, copper strands, and the like. 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 perform communication through the PC5 port, for example, side link (sidelink) data is transmitted between the first terminal device and the second terminal device.

Fig. 1 shows a schematic structural diagram of a 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 (i.e. the RAN comprises base stations and base station controllers), or may be a base station access system of a 3G network (i.e. the RAN comprises base stations and RNCs), or may be a base station access system of a 4G network (i.e. the RAN comprises enbs and RNCs), or may be a base station access system of a 5G network.

The RAN comprises one or more second communication devices, which may be network devices, for example. The network device may be any device with a wireless transceiving function, or a chip disposed in a specific device with a wireless transceiving function. The network devices include, but are not limited to: a base station (e.g. a base station BS, a base station NodeB, an evolved base station eNodeB or eNB, a base station gdnodeb or gNB in a fifth generation 5G communication system, a base station in a future communication system, an access node in a WiFi system, a wireless relay node, a wireless backhaul node), etc. The base station may be: macro base stations, micro base stations, pico base stations, small stations, relay stations, etc. A network, or future evolution network, in which multiple base stations may support one or more of the technologies mentioned above. The core network may support a network of one or more of the above mentioned technologies, or a future evolution network. A base station may include one or more Transmission Receiving Points (TRPs) that are co-sited or non-co-sited. The network device may also be a wireless controller, a Centralized Unit (CU), a Distributed Unit (DU), or the like in a Cloud Radio Access Network (CRAN) scenario. The network device may also be a server, a wearable device, or a vehicle mounted device, etc. The following description will take a network device as an example of a base station. The multiple network devices may be base stations of the same type or different types.

The first communication device may be a terminal device, for example, a base station may communicate with the terminal devices 1 to 6, or may communicate with the terminal devices 1 to 6 through a relay station. The terminal devices 1-6 may support communication with multiple base stations of different technologies, for example, the terminal devices may support communication with a base station supporting an LTE network, may support communication with a base station supporting a 5G network, and may support dual connectivity with a base station of an LTE network and a base station of a 5G network. Such as a RAN node that accesses the terminal to the wireless network. Currently, some examples of RAN nodes are: a gbb, a Transmission Reception Point (TRP), an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a Base Band Unit (BBU), or a wireless fidelity (Wifi) Access Point (AP), etc. In one network configuration, a 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.

The terminal 1-6, also called User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), a terminal, etc., is a device for providing voice and/or data connectivity to a user, or a chip disposed in the device, such as a handheld device, a vehicle-mounted device, etc., which has wireless connectivity. Currently, some examples of terminal devices are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation security), a wireless terminal in city (smart city), a wireless terminal in home (smart home), and the like. The terminal device provided by the embodiment of the application can be a low-complexity terminal device and/or a terminal device in a coverage enhancement A mode.

In the embodiment of the present application, a base station and UEs 1 to 6 form a communication system, in which the base station sends one or more of system information, RAR message and paging message to one or more of UEs 1 to 6, and UEs 4 to 6 also form a communication system, in which UE5 may be implemented as a function of the base station, and UE5 may send one or more of system information, control information and paging message to one or more of

UEs

4 and 6.

In the embodiment of the present application, the downlink data transmission from the second communication device is switched to the uplink data transmission from the first communication device, and there is a gap (gap) time in between. In order to achieve the purpose that the base station shares the COT and simultaneously avoid the preemption of the channel by other systems, the current standard is specified as follows:

1. when the interval time is less than 16 microseconds (us), the first communication device may directly transmit the upstream signal and the data. In a standard protocol, a signal is generally terminated at a physical layer and does not bear data, such as an uplink reference signal or a pilot signal, and data is generally carried on a bearer channel, such as control data carried on a control channel, such as service data carried on a data channel.

2. When the interval time is greater than 16us and less than 25us, the first communication device needs to perform a single LBT with a shorter time, i.e. the first communication device needs to perform LBT scheme 2 (cat 2) without random backoff.

3. When the interval time is greater than 25us, the first communication device may need to perform LBT for a longer time, i.e. the first communication device needs to perform LBT scheme 4 (cat 4), random backoff of the variable contention window.

In a Channel Occupancy Time (COT) acquired by the second communication device, more than 1 uplink and downlink switching points greater than 16us and less than 25us are not allowed to occur.

Therefore, if the interval time exceeds 16us, multiple times of uplink and downlink switching cannot be performed in one COT, which affects the flexibility of system scheduling and cannot meet the requirement of low delay of service. If the time interval is less than 16us, although the first communication device does not need to perform LBT, it is also possible that other neighboring cells or transmitting nodes of different systems obtain transmitting rights and transmit signals on the same channel, which may cause mutual interference to uplink signals.

In summary, due to the existence of the uplink and downlink switching time interval, if the time interval is between 16us and 25us, there is a risk of losing the channel due to LBT, and at this time, if the channel is occupied by other nodes, not only the first communication device cannot transmit uplink signals or data, but also the second communication device cannot transmit downlink signals or data. If the interval is greater than 25us, the first communication device needs to do a longer LBT, which increases the risk of losing the channel. When the interval time is less than 16us, although LBT is not required, it is also possible that other neighboring cells or transmitting nodes of different systems obtain transmitting authority and transmit signals on the same channel, which may cause mutual interference to uplink signals.

In order to solve the problem of channel loss risk caused by too long interval time in the prior art, an embodiment of the present application provides the following data transmission method, which is applicable to an uplink and downlink data switching process in a COT scenario, and please refer to fig. 2, where it is a schematic diagram of a flow block of a data transmission method applied to a first communication device, and the method mainly includes the following steps:

201. the first communication equipment 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 a first transceiving interval.

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

The communication system to which the embodiment of the present invention is applied at least includes: 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 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 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, the two terminal devices communicate with each other through a PC5 port, the first data may be first sidelink data sent by the second terminal device to the first terminal device, and the second data may be second sidelink data sent by the first terminal device to the second terminal device.

It should be noted that, in the embodiment of the present application, the data transmitted between the first communication device and the second communication device may be channel data, and may further include various signals, for example, the channel data may include data channel data and control channel data, for example, the signals may be Sounding Reference Signals (SRS), channel state information reference signals (CSI-RS), demodulation reference signals (DMRS), and the like.

In this embodiment, 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 when performing data scheduling. The ending time of the first data refers to when the first data ends transmission during downlink transmission, the second data refers to uplink data to be transmitted, and the starting time of the second data refers to when the second communication device schedules the second data to perform uplink transmission to start transmission.

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

the method comprises the steps that first communication equipment obtains first scheduling information and fourth scheduling information configured by second communication equipment, wherein the first scheduling information is used for scheduling first data, and the fourth scheduling information is used for scheduling second data;

the first communication equipment determines the ending moment of the first data according to the time domain information indication of the first scheduling information; and the number of the first and second groups,

the first communication device determines a start time of the second data according to a time domain information indication of the fourth scheduling information and preset Timing Advance (TA).

The second communication device sends first scheduling information and fourth scheduling information to the first communication device, wherein the first scheduling information is used for scheduling first data, and the fourth scheduling information is used for scheduling second data. The first communication device first determines a time corresponding to a time slot (or symbol) boundary of the second communication device according to the synchronization signal, the first scheduling information indicates a starting time slot (or symbol) occupied by the first data and the number of symbols occupied by the first data, the time domain information of the first scheduling information indicates a time corresponding to the time slot (or symbol) boundary, the starting time slot (or symbol) and the number of symbols occupied by the data, and the first communication device determines an ending time of the first data according to the time domain information. 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, determines the transmission time as t0 according to the fourth scheduling information indicating the start time slot (or symbol) occupied by the second data and the number of symbols occupied by the second data, and calculates the start time S1= t0-TA of the second data according to the preset timing advance information TA. The first transceiving interval = S1-S0.

202. The first communication equipment determines the sending time of third data according to the starting time and the lead of the second data, wherein the lead is determined according to the time unit information for transmitting the first data, the third data is the data filled at the front end of the second data by the first communication equipment, the time period obtained by subtracting the ending time of the first data from the sending time of the third data is a second transceiving interval, and the second transceiving interval is smaller than the first transceiving interval.

The first communication device determines an advance in advance, the advance is determined by information of a time unit for transmitting the first data, the time unit can be one symbol or a plurality of symbols, and the like, or the time unit can be one time slot or a plurality of time slots, and the like, and the time unit for transmitting the first data refers to the symbol or the time slot for transmitting the first data. The time unit information for transmitting the first data may be used to determine an advance in advance, and after the advance is obtained, the advance is subtracted from the start time of the second data to obtain a transmission time of third data, that is, the third data needs to be transmitted before the start time of the second data, where the third data is data filled in the front end of the second data by the first communication device. And determining the time obtained by advancing the starting time of the second data by one advance as the sending time of the third data. In the embodiment of the present application, the advance may be measured by a time length, or may be measured by the number of data sampling points, which is not limited herein.

Fig. 3 is a schematic diagram illustrating a transmission sequence of first data, second data, and third data according to 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 a first transceiving interval, the time period obtained by subtracting the end time of the first data from the sending time of the third data is a second transceiving interval, and the second transceiving interval is shorter than the first transceiving interval by an advance, so that the second transceiving interval is smaller than the first transceiving interval, that is, the interval time for switching from receiving the first data to sending the third data is shorter than the interval time for switching from receiving the first data to sending the second data, and the length of the interval time for switching between uplink and downlink is reduced, thereby ensuring the stability of system communication and the predictability of data scheduling.

Next, the advance in the embodiment of the present application will be described in detail. In some embodiments of the present application, the first communication device may advance the transceiver switching. 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 the radio frequency device. In the embodiment of the present application, the transceiver can be switched without waiting for the end of downlink data transmission, that is, the transceiver switching is already started when the downlink data is not received. In the embodiment of the present application, the transceiver is switched in advance based on the end time of the downlink data, and the advance amount may be used to indicate the length of advance time for switching the transceiver in advance.

In some embodiments of the present application, the advance amount may be used to indicate an advance time length for advancing the transceiver switching, in which case, in step 201, after the first communication device determines the end time of the first data and the start time of the second data, the data transmission method provided in this embodiment of the present application further includes the following steps:

a1, first communication equipment determines the starting time of transceiver switching according to the ending time and the advance of first data;

a2, the first communication equipment switches the transceiver at the initial moment of switching the transceiver;

a3, after the transceiver is switched, triggering to execute the following step 203: the first communication device transmits the third data to the second communication device at the transmission timing of the third data, and then transmits the second data to the second communication device at the start timing of the second data.

The advance can be used to indicate the length of advance time for advancing the transceiver switching, after the first communication device obtains the advance, the transceiver switching is performed in advance according to the advance determined on the basis of the end time of the first data, and the start time advanced on the basis of the end time of the first data is determined as the start time of the transceiver switching. The first communication device performs the transceiver switching at the starting time of the transceiver switching, that is, the embodiment of the present invention implements the transceiver switching in advance with respect to the prior art, where the transceiver switching may also be referred to as radio frequency transceiver switching, and is exemplified by the transceiver switching in the embodiment of the present invention, and the length of time required for the transceiver switching may be determined according to a data transmission protocol between the first communication device and the second communication device, for example, the length of time required for the transceiver switching is not greater than 13us. When the transceiver switch is over, the first communication device may be triggered to perform the following step 203 to transmit the third data to the second communication device at the transmission time of the third data, and then transmit the second data to the second communication device at the start time of 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 in this embodiment of the present application further includes:

and B1, the first communication equipment determines whether the first communication equipment meets the advanced transceiving switching condition according to the first transceiving interval and the Cyclic Prefix (CP) length information of the last time unit for transmitting the first data.

In this embodiment, the first communication device may further preset an advance transceiving switching condition, where the advance transceiving switching condition is a determination condition for determining whether transceiver switching can be performed in advance. According to the embodiment of the invention, after the condition of switching between receiving and sending in advance can be set, the first communication equipment acquires the first receiving and sending interval and the CP length information of the last time unit for transmitting the first data, and determines whether the condition of switching between receiving and sending in advance is met according to the first receiving and sending interval and the CP length. For example, the condition for switching between transceiving and receiving in advance may include a threshold, and if a difference obtained by subtracting the CP length from the first transceiving interval is smaller than the threshold, it may be determined that the first communication device satisfies the condition for switching between transceiving and receiving in advance, and if a difference obtained by subtracting the CP length from the first transceiving interval is greater than or equal to the threshold, it may be determined that the first communication device does not satisfy the condition for switching between transceiving and receiving in advance.

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

and C1, when the first communication equipment meets the condition of switching receiving and sending in advance, the first communication equipment determines the advance according to the CP length information of the last time unit for transmitting the first data.

When the first communication device satisfies the condition of switching between early transceiving and receiving, the advance amount in step 202 may be determined according to the CP length of the last time unit for transmitting the first data, for example, the first communication device may set the advance amount d to d = CP length, or d =3/4CP length, or d =1/2 CP length. The first communication device may determine the relationship between the advance amount and the CP length according to a specific scenario as long as the advance transceiving switching condition can be satisfied.

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

d1, first communication equipment acquires subcarrier intervals of first data and CP type information of the last time unit for transmitting the first data;

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

The subcarrier spacing (SCS) of the first data acquired by the first communication device is a frequency value, and the CP type information of the last time unit for transmitting the first data acquired by the first communication device may include: a normal cyclic prefix (normal cyclic prefix) and an extended cyclic prefix (extended cyclic prefix), wherein the normal cyclic prefix length is 4.7us and the extended cyclic prefix length is 16.67us. The first communication device determines CP length information of a last time unit for transmitting the first data according to the subcarrier spacing and the CP type information of the first data. For example, the first communication device may calculate the CP length of the last symbol according to the subcarrier spacing value of the symbol and the CP type, and if using the current parameters, may calculate the data sample number or time of the CP as shown in table 1 below.

e1, the first communication equipment determines a time unit which is not scheduled to the first communication equipment according to first scheduling information configured by the second communication equipment, wherein the first scheduling information is used for scheduling first data;

and E2, the first communication equipment determines the advance according to the time unit which is not scheduled to the first communication equipment.

Before the second communication device sends the first data, the second communication device sends 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 time units not scheduled to the first communication device according to the first scheduling information, the time units not scheduled to the first communication device being time units in which no data is transmitted to the first communication device at the end of the time unit in which the first data is transmitted, e.g., the end within the last symbol in which the first data is transmitted. The first communication device determines the advance according to the time unit not scheduled to the first communication device, for example, the advance in step 202 may not be greater than the time unit not scheduled to the first communication device, and the first communication device may perform transceiver switching in advance according to the advance, thereby reducing the length of the interval time of uplink and downlink switching, and ensuring the stability of system communication and the predictability of data scheduling.

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

the time unit of no data scheduled to the first communication device, the time unit of data scheduled to have been received by the first communication device, the time unit of data scheduled to other communication devices than said first communication device.

The fact that data is not scheduled to the first communication device means that the second communication device does not transmit data to the first communication device, for example, as follows, in a downlink time slot adjacent to an uplink time slot, the total number of symbols is 14, and the numbers are 0 to 13. When the downlink scheduling information indicates that the symbols with numbers 0-10 have data scheduled to the first communication device, but the symbols with numbers 11-13 are not scheduled to the first communication device, it is considered that 4 symbols are not scheduled in total, and 4 symbols without data scheduled to the first communication device can be used for determining the advance. The time unit for scheduling the data that the first communication device has received refers to a time unit for the first communication device to repeatedly receive the data, for example, as follows, if the first communication device receives the scheduling information of the broadcast signal, since the broadcast signal is periodically transmitted, the transmission may not be received for the first communication device, the broadcast signals may be regarded as unscheduled signals, and the time unit for scheduling the data that the first communication device has received may be used to determine the advance. For another example: the data scheduled to the first communication device is retransmission data, the data carried by the last symbol or symbols of the retransmission data is decoded correctly by the first communication device in the previous transmission process, and at this time, the data does not need to be received any more, the retransmission data can be regarded as an unscheduled signal, and the time unit for scheduling the data received by the first communication device can be used for determining the advance. A time unit that schedules data to other communication devices than 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, the time unit is still a time unit that is not scheduled to the first communication device, and the time unit that schedules data to other communication devices than the first communication device can be used for determining the advance.

It should be noted that, in the above-mentioned embodiments of the present application, the second communication device may schedule data to other communication devices except the first communication device on the time unit that is not scheduled to the first communication device, and therefore the first communication device does not need to receive the data any more. In addition, in the calculation of the uplink and downlink scheduling interval, the end time of the first data is the data end time at which scheduling actually occurs in the second communication apparatus.

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

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

f1, the first communication equipment switches the transceiver at the end time of the first data;

and F2, when the transceiver is switched to be finished, the first communication equipment sends third data to the second communication equipment at the finishing moment of the transceiver switching, and then sends second data to the second communication equipment at the starting moment of the second data.

In the implementation scenario of steps F1 to F2, the first communication device starts the transceiver switching at the end time of the first data. The end time of the transceiver switching is the sending time of the third data, the first communication device sends the third data to the second communication device at the end time of the transceiver switching, and then sends the second data to the second communication device at the start time of the second data. Therefore, the receiving and sending interval can be reduced to the time (such as 13 us) for switching the hardware of the radio frequency transceiver, and the embodiment of the application can be applied to the scene of one carrier or the scene of a plurality of synchronous carriers, wherein the plurality of synchronous carriers can be carriers under the same network system. For example, the first communication device receives signals and data for carrier 1 and carrier 2 using the same set of receivers. From the perspective of the first communication device, the carrier 1 and the carrier 2 are completely synchronized, that is, the transceiving switching time point of the carrier 1 is the same as that of the carrier 2.

When the first data is transmitted by a single carrier or a plurality of synchronous carriers, the transceiver switching is started at the end time of the first data, and the third data can be transmitted after the transceiver switching is completed, so that the switching time interval of the uplink and the downlink can be shortened to the switching time of the transceiver, and the switching time interval of the uplink and the downlink can be effectively shortened.

It should be noted that the embodiment of steps F1 to F2 may still be combined with the embodiment of steps A1 to A3, so that the time interval between the uplink and downlink switching may still be further reduced, and the risk of losing the channel is reduced.

In other embodiments of the present application, when the first data is transmitted through a plurality of non-synchronous carriers, a data transmission method provided in an embodiment of the present application further includes:

f3, the first communication equipment switches the transceiver at the latest finishing moment of transmitting the first data;

and F4, when the transceiver is switched to be finished, the first communication equipment sends third data to the second communication equipment at the finishing moment of the transceiver switching, and then sends second data to the second communication equipment at the starting moment 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 until the latest carrier receives the first data before performing transceiver switching.

As shown in fig. 4, a schematic diagram of transceiver switching in a multiple non-synchronous carrier transmission scenario is provided in the embodiment of the present application. The first communication device receives the signals and data of carrier 1 and carrier 2 using the same set of receivers. The multiple non-synchronous carriers may be multiple carriers in the same network system, or the multiple non-synchronous carriers may be carriers in different network systems, for example, multiple non-synchronous carriers in an LTE system and an NR system. From the side of the first communication device, the carrier 1 and the carrier 2 are not synchronous, that is, there is a synchronization error, for example, the synchronization error is d microseconds, that is, the time that the carrier 2 lags behind the carrier 1 is d microseconds, in order to ensure the receiving integrity of the downlink data of the carrier 2, the transceiver needs to perform transceiving switching at the end of the downlink time slot of the carrier 2, but cannot perform transceiving switching at the end of the downlink time slot of the carrier 1.

Thus, 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 time for the transceiver to switch. If the synchronization error d is larger, the length of the uplink and downlink data interval is larger. There are two reasons for synchronization errors between different carriers: one is that the device accuracy and drift to temperature (timer error or oscillator drift) of different carriers are different, resulting in errors in the transmission time. Secondly, paths through which different carrier signals pass are different, so that multipath time delays are different. If the value of the synchronization error d needs to be reduced, the device accuracy or algorithm accuracy of the base station or the terminal needs to be improved, which may increase the cost of the base station or the terminal, or increase the complexity of the base station or the terminal.

The embodiments of steps F3 to F4 in the embodiment of the present application can be combined with the embodiments of steps A1 to A3, so as to reduce the requirements on the precision of the device or the complexity of the algorithm, thereby reducing the cost. When the current system is in a plurality of carriers, especially when the first communication equipment end can not ensure signal receiving synchronization, the radio frequency transceiving conversion can be started after the first data of the last carrier is received after time synchronization, and the lag time depends on the timing error of the carriers. By using the transceiver switching in advance in the embodiment of the application, the interval time of uplink and downlink switching can be well reduced, the risk of losing channels is reduced, and the efficiency of system data transmission is improved.

In some embodiments of the present application, the data transmission method provided in 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, wherein the radio frequency capability information is used for indicating the time length of the first communication device for executing transceiver switching and indicating whether the first communication device supports transceiver switching in advance.

In order to better schedule and transmit data between the first communication device and the second communication device, the first communication device further needs to interact with the second communication device, the first communication device sends radio frequency capability information to the second communication device, and the radio frequency capability information is used for indicating the time length of the first communication device for executing transceiver switching and indicating whether the first communication device supports transceiver switching in advance.

For example, the first communication device reports the length of time for the transceiver to switch. For example, reporting a specific value of transceiver switching, information of 4 bits (bit) may be used to indicate a specific time of radio frequency switching, and a unit is microseconds, or information of 3 bits or 2 bits may be used to indicate a difference delta between different carriers and basic transceiver switching capability, such as: the basic transceiving switching capacity can be 13us, and the time value of the actual transceiving switching of different carriers = 13-reported delta. In addition, the first communication device may also report whether the first communication device supports transceiver handover in advance, the second communication device receives the radio frequency capability information, and if the first communication device supports transceiver handover in advance, the second communication device may indicate whether the first communication device uses transceiver handover in advance.

h1, the first communication equipment sends multi-carrier error information to the second communication equipment, and the multi-carrier error information is used for indicating the time length of synchronization errors among multiple carriers.

The first communication device may also report a synchronization error between multiple carriers to the second communication device, for example, the first communication device sends multicarrier error information, where the multicarrier error information may include: 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 equipment receives second scheduling information sent by the second communication equipment, and the second scheduling information comprises at least one of the following three parameters: the first scheduling parameter is used for indicating the starting time of second data, the second scheduling parameter is used for indicating whether the first communication equipment switches the transceiver in advance, and the third scheduling parameter is used for indicating a Listen Before Talk (LBT) parameter of the first communication equipment;

and I2, the first communication equipment determines the starting time of the second data according to the first scheduling parameter, determines whether to perform transceiver switching in advance according to the second scheduling parameter, and determines an LBT parameter according to the third scheduling parameter.

The second communication device sends second scheduling information to the first communication device, wherein the second scheduling information includes at least one of the following three parameters: the base station comprises a first scheduling parameter, a second scheduling parameter and a third scheduling parameter, wherein the first scheduling parameter is used for indicating the starting time of second data, the second scheduling parameter is used for indicating whether the first communication equipment carries out transceiver switching in advance, and the third scheduling parameter is used for indicating an LBT parameter of the first communication equipment. For example, when the second communication device schedules the first communication device to send the second data, it indicates that the first communication device needs to make the LBT type and LBT access class parameters before sending the second data. In the three scheduling parameters sent by the second communications device, the first scheduling parameter is used to indicate a start time 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 communications device performs a method for reducing the GAP time, where if the value of the second scheduling parameter is 0, the GAP reduction is not performed, and if the value of the second scheduling parameter is 1, the GAP reduction is performed. The third scheduling parameter may indicate an LBT access type, if the third scheduling parameter takes the value 00, it indicates that there is no LBT, that is, the third scheduling parameter is sent directly, if the third scheduling parameter takes the value 01, it indicates that LBT CAT2 is made, if the third scheduling parameter takes the value 10, it indicates that LBT CAT4 is made, and if the third scheduling parameter takes the value 11, it indicates that a reserved field is reserved.

Wherein the second communication device may generate a second scheduling parameter for indicating whether the first communication device is performing the transceiver handover in advance. For example, the second communication device calculates the interval time of uplink and downlink switching = switching delay relative to the carrier + time of transceiver switching, and then determines the possible amount of advance of the first communication device, and if the interval time of uplink and downlink switching is greater than 16us and (the interval time of uplink and downlink switching-the possible amount of advance of the first communication device) < 16us, the second communication device instructs the first communication device to perform transceiver switching in advance. If the time interval between the uplink and the downlink switching is less than 16, the first communication device is not instructed to carry out the transceiver switching in advance, and whether to carry out the advance switching is decided by the first communication device.

the first communication equipment receives third scheduling information sent by the second communication equipment, wherein the third scheduling information is used for indicating that the first communication equipment acquires the LBT parameter;

the first communication equipment determines that the second communication equipment indicates that the first communication equipment acquires the LBT parameter;

the first communication device acquires the LBT parameter 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 be the type for the first communication device to obtain the LBT parameter by itself, that is, at this time, the second communication device does not indicate the specific LBT parameter to the first communication device any more, and the third scheduling message is used to indicate the first communication device to obtain the LBT parameter. After receiving the third scheduling information, the first communication device determines that the first communication device determines the type of LBT itself, and the first communication device may calculate the possible transceiving interval of the uplink and downlink data, and perform corresponding LBT according to the actual transceiving interval. For example, the enabled transceiving interval is not greater than 16us, and the first communication device may not perform LBT and directly transmit uplink data at the scheduled time. And if the transceiving interval can be more than 16us and less than 25us, the first communication device can select LBT cat2. Here, the transmission/reception interval that can be achieved may be the time of the first transmission/reception interval determined by the first communication device, or may be the time of the second transmission/reception interval determined by the first communication device.

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

If the time after the first communication device completes the transceiver switching is earlier than the end time of the first data, and in order to reduce interference to other users caused by the first communication device transmitting the third data, it is necessary to control the transmission time of the third data not to be earlier than the end time of the first data, for example, the first communication device may limit the amount of advance for performing transceiver switching in advance, and assuming that the end time of the last downlink symbol is S0 and the time when the first communication device completes the transceiver switching is S3, S3 may not be earlier than S0.

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

before the end time of the first data is reached, the first communication device controls the radio frequency transmission power to be less than or equal to a preset transmission power threshold value.

If the time after the first communication device performs the transceiver handover is earlier than the end time of the first data, in order to reduce interference caused by the first communication device transmitting the third data to other users, the first communication device needs to control the power of the transmission signal after performing the transceiver handover, assuming that the end time of the last downlink symbol is S0, assuming that the transmission power threshold of the terminal is P0, for example, the transmission power threshold is the minimum transmission power P0, and in the radio frequency control, the transmission power of the first communication device is not greater than P0 before S0.

203. The first communication device transmits the third data to the second communication device at the transmission timing of the third data, and then transmits the second data to the second communication device at the start timing of the second data.

In the embodiment of the application, the first communication device sends the third data filled at the front end of the second data before sending the second data according to the starting time of the second data scheduled by the second communication device, so that the length of a signal blank period in the interval time for switching from receiving the first data to sending the second data is reduced, and the interval time for switching between uplink and downlink is shortened to the second transceiving interval, thereby ensuring the stability of system communication and the predictability of data scheduling.

In some embodiments of the present application, the third data is a segment 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. For example, as follows, the data transmission method provided in the embodiment of the present application may further include the following steps:

j1, copying a piece of data from the second data as third data by the first communication equipment according to the advance, wherein the length of the third data is equal to the advance;

j2, the first communication device adds the third data to the front end of the CP header of the first time unit for transmitting the second data, and the second data added with the third data is obtained.

And copying a section of data from the second data as third data, wherein the length of the third data is equal to the advance. In order to reduce the problem of inter-symbol interference caused by channel multipath, CP technology may be introduced in the communication system, that is, a CP header may be added to the first time unit for transmitting the second data, where the CP header may be a piece of data copied from the tail of the second data. For example, the third data is a segment of data copied from the second data, the copied third data can form a new CP with an original CP of the second data, and the third data in this embodiment of the application may be a segment of data located before and adjacent to a tail of the second data in the second data. The copied third data may be added to the front end of the CP header, so that the second data to which the third data is added may be obtained, and finally the first communication apparatus transmits the third data at the transmission timing of the third data, and then transmits the second data at the start timing of the second data.

and K1, adding third data at the front end of the CP header of the first time unit for transmitting the second data by the first communication equipment, wherein the third data is a random number or a reference signal.

In the step K1, the first communication device may add third data at a front end of a CP header of a first time unit of transmitting the second data, and the third data generated by the first communication device may be a random number or a reference signal. For example, the first communication device may expand the subcarrier spacing, for example, from original 15KHz to 60KHz, so that the average symbol length is changed from 71.4us to 17.86us, and may send the reference signal before the second data is sent, so that the receiving end may increase resources for channel estimation by sending the reference signal, and the channel estimation result is more accurate, which is beneficial to improving the receiving performance of the receiving end.

As can be seen from the foregoing illustration of the embodiment, a first communication device first determines 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 is a first transceiving interval, the first data is sent by a second communication device, the second data is data to be sent by the first communication device, the first communication device next determines a sending time of third data according to the start time and an advance of the second data, the advance is determined according to time unit information for transmitting the first data, the third data is data filled in 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 sending time of the third data is a 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 time of the third data, and then sends the second data to the second communication device at the start time of 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, in this embodiment, the second transceiving interval is smaller than the first transceiving interval, that is, the interval time from receiving the first data to sending the third data is shorter than the interval time from receiving the first data to sending the second data, which reduces the length of the interval time of uplink and downlink switching, thereby ensuring the stability of system communication and the predictability of data scheduling.

In order to better understand and implement the above-described scheme of the embodiments of the present application, the following description specifically illustrates a corresponding application scenario.

The embodiment of the application provides a data transmission method, which reduces the length of interval time of uplink and downlink switching by starting transceiver switching in advance and sending uplink data after switching is completed.

Next, an example will be described in which the first communication device is a terminal and the second communication device is a base station. As shown in fig. 5, a schematic flow chart of a data transmission method implemented based on a terminal according to an embodiment of the present application mainly includes the following flows:

and S10, the terminal judges whether the switching condition of receiving and sending in advance is met.

Wherein, the terminal can judge whether the condition of switching the transceiver in advance is satisfied.

Fig. 6 is a schematic diagram illustrating 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, CP technology is introduced in an Orthogonal Frequency Division Multiplexing (OFDM) system, and CP1 is formed by copying a segment of data (i.e., data 1) at the tail of first data and placing the copied segment of data at the head of the first data.

The terminal receives the scheduling information of the base station, and calculates the starting time of the second data according to the sending time t0 of the uplink scheduling information and by considering the timing advance information TA: s1= t0-TA. The terminal calculates the end time S0 of the first data based on the timing information.

The condition for performing the transceiver handover in advance may be set as follows: S1-S0 > threshold 1, and (S1-S0-CP) < threshold 1, satisfying this condition can perform S11.

When S1-S0 is greater than the threshold 1, the terminal needs to do additional work, for example, the threshold 1= 1696s, and when the threshold is greater than 16us, the terminal needs to perform the LBT cat2 process, and if the threshold 1 is less than 16us, the terminal does not need to do LBT cat2. For example, if the threshold value 1=25us, the LBT cat4 process is required when the S1-S0 is larger than the threshold value 25us, and the LBT cat4 process is not required when the S1-S0 is smaller than the threshold value 25us, but only LBT cat2 is required.

S11, the terminal determines the advance of the switching of the transceiver.

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

For example, the terminal calculates an advance time point S2 at which the transceiver can be switched in advance, and as shown in fig. 6, assuming that the original position of the transceiver switching is the last bit S0 of the first data, the advance amount calculated in the following step is d, the advance switching start time point S2= S0-d and the advance switching end time point is S3= S1-d.

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

It should be noted that, in the 5G system, 14 symbols are used in 1 slot, and if the symbol is 0 or 7 in one slot, the CP corresponding to the 1 slot is longer than the CP of other symbols, which requires to be increased by a constant, for example, the constant is 16 sample values.

The calculation of the advanced switching time point is explained next. The CP supplement principle is used, that is, the position of the CP starting point and the data of the symbol last bit have the same region data. The number of data sequence repetitions (or similar) is confirmed. The number of sampling points is data that can be switched between transmission and reception in advance. It should be noted that, the calculation in this step needs to be performed in advance, and the calculated advance switching amount is smaller than the length of the CP.

In the embodiment of the present application, the advance may be set to d = CP length, or d =3/4CP length, or d =1/2 CP length, as long as the target of step S0 can be satisfied.

It should be noted that the calculation processes in steps S10 and S11 may be performed after receiving the base station scheduling command.

S12, the terminal executes the switching of the transceiver in advance according to the advance.

The terminal can perform the receiving and sending switching in advance according to the time point calculated in advance.

Fig. 7 is a schematic structural diagram of a terminal for performing transceiver handover in advance for a terminal according to an embodiment of the present application. The transceiver may include: the antenna comprises a baseband chip, a radio frequency chip, an antenna switch module and an antenna. The baseband chip is used for baseband processing, and the baseband chip may include: the transceiver timing calculation module and the radio frequency chip may sequentially include: the device comprises a digital-to-analog conversion module, an amplifier, a filter, a mixer, an amplifier and a filter. The baseband chip controls the radio frequency channel of the radio frequency chip to be opened at S2 moment, the baseband chip sends an antenna transceiving control command to the antenna transceiving module, and the antenna transceiving module starts antenna transceiving switching at S2 moment.

For example, the terminal instructs the radio frequency to perform the transceiving switching according to the instructed time point by controlling the antenna switch module and the radio frequency channel according to the calculated new transceiving switching time point. As shown in fig. 6, assuming that the original position of the transmission/reception switching is the last downlink symbol bit S0, the calculated advance amount in the above step is d, the advanced switching start time point S2= S0-d and the advanced switching end time point S3= S1-d, that is, the antenna can start to transmit the third data (i.e., CP 2) from the time point S3, and after the third data is transmitted, the second data is transmitted, where the third data may be data 2 copied from the tail of the second data.

The command transmission of antenna receiving and transmitting switching has two realization modes: 1: the transmission/reception command is transmitted at the switching time S2. 2: and after the advance is calculated, immediately sending the uplink data to the antenna switch module, caching by the antenna switch module, and when the time arrives, taking the command into effect and executing a switching command.

And S13, the terminal compensates the lost downlink data caused by the early execution of the receiving and sending switching.

Wherein the terminal can supplement the lost downlink data using the CP information of the lost downlink symbol data.

And S14, the terminal firstly sends the third data and then sends the second data according to the advance.

The third data transmitted by the terminal is CP2 formed by data 2 in fig. 6.

In the embodiment of the present application, the terminal needs to perform data filling and sending of the advance switching time period d. After the radio frequency completes the transceiving switching, the terminal performs signal transmission in a time period from the completion of the switching to the transmission of the uplink symbol, where the transmitted signal is third data, the third data may be data 2 copied from the tail of the second data, the third data may be used as a CP header of the second data, and the third data may also be obtained by random number padding.

First, a padding method for copying data from the end of the second data will be described. Fig. 8 is a schematic diagram illustrating data padding in a transmission symbol in the embodiment of the present application. The original OFDM data is as follows:

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 CP addition 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 complementary data of d data samples ahead of the receiving and sending switching is:

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

the padding of the received signal is explained next. The data signal, which is not received in its entirety due to the early switching, is padded with CP data of the symbol header.

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

Fig. 9 is a schematic diagram of the supplemented complete data provided in the embodiment of the present application. Assume that at the transmitting 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 CP is added at the sending end is as follows:

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 receiving and sending 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 switching of the receiving and transmitting conversion is advanced, the advance 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)。

copying d data (d = CP) before the received sequence onto the truncated 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 sends the second data according to the advance, where the third data may be: and intercepting tail data of part of second data to be transmitted, or filling random numbers or reference signals. By adopting the filling method for copying the data from the tail part of the second data, the multipath delay resistance is stronger, and the influence on other terminals is small. And when the third data is the reference signal, the function of auxiliary channel estimation or energy statistics can be realized, and the demodulation performance is improved.

The receiving end may also directly perform data demodulation by using a zero padding method or a random number padding method, thereby simplifying the data demodulation process.

It should be noted that, in the embodiment of the present application, the subcarrier spacing may also be expanded, for example, to 15KHz to 60KHz, so that the average symbol length is changed from 71.4us to 17.86us, a reference signal may be sent on a related symbol, and resources for channel estimation are increased, so that the channel estimation result is more accurate, and the improvement of the receiving performance of the receiving end is facilitated. The reference signal is more extensive, and can be used as a wake-up signal and a pilot signal, and can also be used for signal strength measurement and the like. For example, a wake-up signal is sent to enable the receiving end to perform a data receiving process, the wake-up signal is used to wake up the receiving end to start receiving and processing data, and the pilot signal is used to perform channel estimation at the receiving end.

As can be seen from the foregoing illustration, in the embodiments of the present application, the transceiver is switched in advance by using the CP characteristic without affecting the performance, so as to reduce the time value of the signal interval between the downlink and the uplink. The time for switching ahead can be the length of the CP at the longest, so that the gain is more obvious when the CP is longer.

As shown in fig. 10, a schematic flow chart of another data transmission method implemented based on a terminal according to the embodiment of the present application mainly includes the following flows:

s20: and the terminal calculates the number of downlink symbols which are not scheduled at the tail of the downlink time slot.

And the terminal confirms the position and the number of the symbols needing to be received according to the downlink scheduling control information. For example, the unscheduled symbol may be determined from the last symbol of the downlink slot onwards. When the last bit of the downlink time slot has continuous symbols and is not scheduled, the downlink time slot can be regarded as an unscheduled downlink symbol.

Fig. 11 is a schematic diagram of performing an early transceiving switching by using an unscheduled symbol according to an embodiment of the present application. In fig. 11, the switching point performs the transceiver switching in advance at the last downlink symbol in the prior art, 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 the switching in advance is greatly shortened.

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

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

Fig. 12 is a schematic diagram of determining an unscheduled downlink symbol according to an embodiment of the present application. 1 time slot comprises 14 symbols, 10 of the 14 symbols are downlink symbols, 4 are uplink symbols, and 0-9 symbols in a time slot containing both downlink symbols and uplink symbols are downlink symbols, but in the three symbols of 7,8 and 9, there is no data scheduled for the terminal, so the symbols 7,8 and 9 can be regarded as non-scheduled symbols and can be used for transceiver switching.

In some embodiments of the present application, if the terminal receives the scheduling information of the broadcast signal, since the broadcast signal is periodically transmitted, the terminal may not receive the transmission, and these symbol terminals may be regarded as non-scheduled signals. If the terminal judges that the quality of the currently received signal is better, the experience of the user cannot be influenced even if the last 1 or 2 scheduling symbols are not received. It is also possible for the terminal to treat the last signals as non-scheduled symbols.

S21, the terminal judges whether the condition of switching the transceiver in advance is met.

The terminal judges whether the condition for switching the transceiver in advance is satisfied. The terminal receives the scheduling information of the base station, and calculates the sending time according to the sending time t0 of the uplink scheduling information and in consideration of TA: s1= t0-TA. And 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, then S22 is performed. When S1-S0 is greater than the threshold 1, the terminal is required to do additional work, for example, the threshold 1= 16965 us, the threshold S1-S0 is greater than 16us, the LBT cat2 process is required to be performed, and the LBT cat2 process is not required to be performed when the threshold is less than 16us, for example, the threshold 1=25us, the threshold S1-S0 is greater than 25us, the LBT cat4 process is required to be performed, and the LBT cat2 process is required to be performed when the threshold S1-S0 is less than 25 us.

S22, the terminal executes the switching of the transceiver in advance according to the advance.

The terminal may perform transceiver switching in advance by using the unscheduled symbol, for example, the terminal analyzes downlink scheduling information, and if there is no data to be received on the last downlink symbol, the transceiver switching is performed in advance.

And S23, the terminal firstly sends the third data according to the advance and then sends the second data.

Assuming that the original position of the transmission/reception switching is the last downlink symbol bit S0 and the advance calculated in the above step is the d symbol, the switching start time point S2= S0-d is advanced and the switching end time point S3= S2-d is advanced. That is, the antenna may start transmitting the third data from time S3, and after the third data is transmitted, the second data is transmitted 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 finishes the transceiving switching is earlier than the end time of the downlink symbol, in order to reduce interference caused by the terminal sending the third signal to other users, it is necessary to control that the actual uplink sent signal cannot be earlier than the end time of the downlink symbol, in this embodiment of the present application, the time for performing the transceiver switching in advance may be limited, and if the end time of the last downlink symbol is S0 and the terminal finishes the transceiving switching time is S3, then S3 cannot be earlier than S0. For example, in the embodiment of the present application, after the transceiver is switched, the power of the transmission signal may be controlled, assuming that the end time of the last downlink symbol is S0, assuming that the minimum transmission power of the terminal is defined as P0, and in the radio frequency control, the transmission power of the terminal is not greater than P0 before S0.

Fig. 13 is a schematic structural diagram of another terminal for performing transceiver handover in advance according to an embodiment of the present application. The transceiver may include: the antenna comprises a baseband chip, a radio frequency chip, an antenna switch module and an antenna. The baseband chip is used for baseband processing, and the baseband chip may include: the radio frequency chip can sequentially comprise: the device comprises a digital-to-analog conversion module, an amplifier, a filter, a mixer, an amplifier and a filter. The unscheduled symbol calculation module firstly determines the unscheduled symbol, the baseband chip controls a radio frequency channel of the radio frequency chip to be opened at the S2 moment, the baseband chip sends an antenna transceiving control command to the antenna transceiving module, and the antenna transceiving module starts antenna transceiving switching at the S2 moment.

In the embodiment of the application, the transceiver is switched in advance by using the unscheduled symbol time, so that the interval time of uplink and downlink switching can be reduced.

It should be noted that, in this embodiment of the present application, the terminal may further receive data from one system and switch to another system to transmit data, and due to the influence of the switching time, the receiving performance is reduced. Also, as in the case where the LTE-based system and the NR-based system coexist, the terminal needs to switch back and forth between the two systems, which may reduce the switching time in the embodiment of the present application. For example, a UU port from a base station to a terminal based on an NR system and a PC5 port between the terminal and the terminal exist in a time division switching scenario, which may reduce the switching time in the embodiment of the present application.

It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art will recognize that the embodiments described in this specification are preferred embodiments and that acts or modules referred to are not necessarily required for this application.

To facilitate better implementation of the above-described aspects of the embodiments of the present application, the following also provides related apparatus for implementing the above-described aspects.

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

the processor 1401 is configured to determine an end time of first data and a start time of second data, where a time period obtained by subtracting the end time of the first data from the start time of the second data is a first transceiving 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 a sending time of the third data according to a start time and an advance of the second data, where the advance is determined according to time unit information for transmitting the first data, the third data is data filled in a front end of the second data by the first communication device, a time period obtained by subtracting an end time of the first data from the sending time of the third data is a second transceiving interval, and the second transceiving interval is smaller than the first transceiving interval;

the memory 1402 for storing data and instructions for the transmitter 1403 and the processor 1401;

the transmitter 1403 is configured to transmit the third data to the second communication device at the transmission time of the third data, and then transmit the second data to the second communication device at the starting time of the second data.

In some embodiments of the present application, as shown in fig. 14-b, the first communication device 1400 further comprises: the radio frequency transceiver module 1404, wherein,

the advance is used for indicating the length of advance time for switching the transceiver in advance;

the processor 1401 is further configured to determine, after determining an end time of first data and a start time of second data, a start time of the transceiver handover according to the end time of the first data and the advance;

the processor 1401 is further configured to control the radio frequency transceiver module to perform transceiver switching at an initial time of the transceiver switching;

the processor 1401 is further configured to control the transmitter 1403 to transmit the third data to the second communication device at a transmission time of the third data and then to transmit the second data to the second communication device at a start time of the second data after the transceiver handover is ended.

In some embodiments of the present application, the processor 1401 is further configured to determine whether the first communication apparatus satisfies an advance transceiving switching condition according to the first transceiving interval and cyclic prefix CP length information of a last time unit of transmitting the first data after determining an end time of the first data and a start time of the second data.

In some embodiments of the present application, the processor 1401 is further configured to determine the advance amount according to CP length information of a last time unit for transmitting the first data when the first communication device satisfies the handover condition for advanced transceiving.

In some embodiments of the present application, the processor 1401 is further configured to obtain a subcarrier spacing of the first data and CP type information of a last time unit for transmitting the first data; and determining CP length information of the last time unit for transmitting the first data according to the subcarrier interval of the first data and the CP type information.

In some embodiments of the present application, the processor 1401 is further configured to determine, after determining an end time of first data and a start time of second data, a time unit not scheduled to the first communication device according to first scheduling information configured by the second communication device, where the first scheduling information is used to schedule the first data; determining the advance based on time units not scheduled to the first communication device.

In some embodiments of the present application, the time units stored by the memory 1402 that are not scheduled to the first communication device include at least one of:

a time unit in which data is not scheduled to the first communication device, a time unit in which data that the first communication device has received is scheduled, and a time unit in which data is scheduled to other communication devices other than the first communication device.

the processor 1401 is further configured to control the radio frequency transceiver module to perform transceiver switching at an end time of the first data when the first data is transmitted through a single carrier or multiple synchronous carriers; when the transceiver switch is ended, the transmitter 1403 is controlled to transmit the third data to the second communication device at the transmission time of the third data at the end time of the transceiver switch and then to transmit the second data to the second communication device at the start time of the second data.

In some embodiments of the present application, as shown in fig. 14-b, the first communication device 1400 further comprises: the radio frequency transceiver module 1404 is configured to, among other things,

the processor 1401 is further configured to control the radio frequency transceiver module to perform transceiver switching at a time when transmission of the first data is finished at the latest when the first data is transmitted through a plurality of asynchronous carriers; when the transceiver switch is ended, the transmitter 1403 is controlled to transmit the third data to the second communication device at the transmission time of the third data at the end time of the transceiver switch and then to transmit the second data to the second communication device at the start time of the second data.

In some embodiments of the present application, the transmitter 1403 is further configured to send multicarrier error information to the second communication device, the multicarrier error information indicating a synchronization error time length between multiple carriers.

In some embodiments of the present application, the transmitter 1403 is further configured to transmit radio frequency capability information to the second communication device, the radio frequency capability information being used to indicate a length of time for which the first communication device performs a transceiver handover and to indicate whether the first communication device supports a transceiver handover ahead of time.

In some embodiments of the present application, as shown in fig. 14-c, the first communication device 1400 further comprises: the receiver 1405, which, among other things,

the receiver 1405, 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: the first scheduling parameter is used for indicating the starting time of the second data, the second scheduling parameter is used for indicating whether the first communication equipment carries out transceiver switching in advance, and the third scheduling parameter is used for indicating the Listen Before Talk (LBT) parameter of the first communication equipment;

the processor 1401 is further configured to determine a starting time of the second data according to the first scheduling parameter, determine whether to perform transceiver handover in advance according to the second scheduling parameter, and determine the LBT parameter according to the third scheduling parameter.

In some embodiments of the present application, as shown in fig. 14-c, the first communication device 1400 further comprises: the receiver 1405, wherein,

the receiver 1405, 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 acquire LBT parameters;

the processor 1401, further configured to determine that the second communication device indicates acquisition of LBT parameters by the first communication device;

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

In some embodiments of the present application, the memory 1402 stores the third data with a transmission time later than an end time of the first data.

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

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

the processor 1401, further configured to determine an end time of the first data according to a time domain information indication of the first scheduling information; and determining the starting time of the second data according to the time domain information indication of the fourth scheduling information and preset timing advance information TA.

In some embodiments of the present application, the third data stored in the memory 1402 is a segment 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, because the contents of information interaction, execution process, and the like between the modules/units of the apparatus are based on the same concept as the method embodiment of the present application, the technical effect brought by the contents is the same as the method embodiment of the present application, and specific contents may refer to the description in the foregoing method embodiment of the present application, and are not described herein again.

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

Referring to fig. 15, a first communication device 1500 according to another embodiment of the present application includes:

a receiver 1501, a transmitter 1502, a processor 1503 and a memory 1504 (wherein the number of processors 1503 in the first communication device 1500 may be one or more, for example one processor 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 in other ways, wherein the connection by the bus is exemplified in fig. 15.

Memory 1504 may include both read-only memory and random access memory and provides instructions and data to processor 1503. The portion of the memory 1504 may also include non-volatile random access memory (NVRAM). The memory 1504 stores an operating system and operating instructions, executable modules or data structures, or subsets thereof, or expanded sets thereof, wherein the operating instructions may include various operating instructions for performing various operations. The operating system may include various system programs for implementing various basic services and for handling hardware-based tasks.

The processor 1503 controls the operation of the first communication device, and the processor 1503 may also be referred to as a Central Processing Unit (CPU). In a specific application, the various components of the first communication device are coupled together by a bus system, which may include a power bus, a control bus, a status signal bus, etc., in addition to a data bus. For clarity of illustration, the various buses are referred to in the figures as a bus system.

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 having signal processing capabilities. In implementation, the steps of the above method may be implemented by hardware integrated logic circuits or instructions in software in the processor 1503. 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 device, discrete gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A 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 connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory 1504, and a processor 1503 reads information in the memory 1504 and completes the steps of the above method in combination with hardware thereof.

The receiver 1501 may be configured to receive input numeric or character information and generate signal inputs related to related settings and function control of the first communication device, the transmitter 1502 may include a display device such as a display screen, and the transmitter 1502 may be configured to output numeric or character information through an external interface.

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

In another possible design, when the first communication device is a chip within a terminal, the chip includes: a processing unit, which may be for example a processor, and a communication unit, which may be for example an input/output interface, a pin or a circuit, etc. The processing unit may execute computer-executable instructions stored by the storage unit to cause a chip within the terminal to perform the wireless communication method of any one of the above first aspects. Optionally, the storage unit is a storage unit in the chip, such as a register, a cache, and the like, and the storage unit may also be a storage unit located outside the chip in the terminal, such as a read-only memory (ROM) or another type of static storage device that can store static information and instructions, a Random Access Memory (RAM), and the like.

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 programs of the data transmission method.

It should be noted that the above-described embodiments of the apparatus are merely illustrative, where the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiments of the apparatus provided in the present application, the connection relationship between the modules indicates that there is a communication connection therebetween, and may be implemented as one or more communication buses or signal lines.

Through the above description of the embodiments, those skilled in the art will clearly understand that the present application can be implemented by software plus necessary general-purpose hardware, and certainly can also be implemented by special-purpose hardware including special-purpose integrated circuits, special-purpose CPUs, special-purpose memories, special-purpose components and the like. Generally, functions performed by a computer program can be easily implemented by corresponding hardware, and a specific hardware structure for implementing the same function may be various, such as an analog circuit, a digital circuit, or a dedicated circuit. However, for the present application, the implementation of a software program is more preferable. Based on such understanding, the technical solutions of the present application or portions contributing to the prior art may be substantially embodied in the form of a software product, where the computer software product is stored in a readable storage medium, such as a floppy disk, a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the method according to the embodiments of the present application.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may 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 loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. 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 transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can store or a data storage device, such as a server, a data center, etc., that is integrated with one or more available media. The usable medium may be a magnetic medium (e.g., a floppy Disk, a hard Disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

Claims

1. A method of data transmission, comprising:

the method comprises the steps that first communication equipment determines the end time of first data and the start time of second data, the time period obtained by subtracting the end time of the first data from the start time of the second data is a first transceiving interval, the first data is sent by second communication equipment, and the second data is data to be sent of the first communication equipment;

the first communication equipment determines a time unit which is not scheduled to the first communication equipment according to first scheduling information configured by the second communication equipment, wherein the first scheduling information is used for scheduling the first data; wherein the time unit not scheduled to the first communication device comprises at least one of the following time units: a time unit when data is not scheduled to a first communication device, a time unit when data which has been received by the first communication device is scheduled, and a time unit when data is scheduled to other communication devices except the first communication device;

the first communication device determines an advance according to a time unit which is not scheduled to the first communication device;

the first communication device determines a sending time of third data according to a starting time of the second data and the lead, wherein the lead is determined according to time unit information for transmitting the first data, the lead is used for indicating a lead time length for switching a transceiver in advance, the third data is data filled at the front end of the second data by the first communication device, a time period obtained by subtracting an ending time of the first data from the sending time of the third data is a 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 transmits the third data to the second communication device at the transmission time of the third data, and then transmits the second data to the second communication device at the start time of the second data.

2. The method of claim 1, wherein the first communication device determines that the end time of the first data and the start time of the second data are later, the method further comprising:

the first communication equipment determines the starting time of the transceiver switching according to the ending time of the first data and the advance;

the first communication equipment performs transceiver switching at the starting moment of the transceiver switching;

when the transceiver switch is finished, triggering to execute the following steps: the first communication device transmits the third data to the second communication device at the transmission time of the third data, and then transmits the second data to the second communication device at the start time of the second data.

3. The method of claim 2, wherein the first communication device determines that the end time of the first data and the start time of the second data are later, the method further comprising:

and the first communication equipment determines whether the first communication equipment meets an advanced transceiving switching condition according to the first transceiving interval and the Cyclic Prefix (CP) length information of the last time unit for transmitting the first data.

4. The method of claim 3, further comprising:

and when the first communication equipment meets the condition of switching the receiving and sending in advance, the first communication equipment determines the advance according to the CP length information of the last time unit for transmitting the first data.

5. The method according to any of claims 1 to 4, wherein when the first data is transmitted over a single carrier or multiple synchronization carriers, the method further comprises:

the first communication device performs transceiver switching at the end time of the first data;

when the transceiver switching is finished, the first communication device transmits the third data to the second communication device at the end time of the transceiver switching, and then transmits the second data to the second communication device at the start time of the second data.

6. The method of any of claims 1-4, wherein when the first data is transmitted over a plurality of non-synchronized carriers, the method further comprises:

the first communication equipment switches the transceiver at the latest finishing moment of transmitting the first data;

7. The method according to any one of claims 1 to 4, further comprising:

the first communication device receives third scheduling information sent by the second communication device, wherein the third scheduling information is used for indicating that the first communication device obtains an LBT parameter;

the first communication device determining that the second communication device indicates acquisition of the LBT parameter by the first communication device;

8. The method of any of claims 1 to 4, wherein the first communication device determining an end time of the first data and a start time of the second data comprises:

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

the first communication equipment determines the end time of the first data according to the time domain information indication of the first scheduling information; and the number of the first and second groups,

and the first communication equipment determines the starting time of the second data according to the time domain information indication of the fourth scheduling information and preset timing advance information TA.

9. The method according to any one of claims 1 to 4, wherein the third data is a segment 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.

10. A communication device, specifically a first communication device, the first communication device comprising: a processor, a memory, and a transmitter;

the processor is configured to determine an end time of first data and a start time of second data, where a time period obtained by subtracting the end time of the first data from the start time of the second data is a first transceiving interval, the first data is sent by a second communication device, and the second data is data to be sent of the first communication device;

the processor is further configured to determine, after determining an end time of first data and a start time of second data, a time unit not scheduled to the first communication device according to first scheduling information configured by the second communication device, where the first scheduling information is used to schedule the first data; wherein the time unit not scheduled to the first communication device comprises at least one of the following time units: a time unit when data is not scheduled to a first communication device, a time unit when data which has been received by the first communication device is scheduled, and a time unit when data is scheduled to other communication devices except the first communication device; determining an advance based on time units not scheduled to the first communication device;

the processor is further configured to determine a sending time of third data according to a start time of the second data and the lead, where the lead is determined according to time unit information for transmitting the first data, the lead is used to indicate a length of a lead time for performing transceiver switching in advance, the third data is data filled at a front end of the second data by the first communication device, a time period obtained by subtracting an end time of the first data from the sending time of the third data is a second transceiving interval, and the second transceiving interval is smaller than the first transceiving interval;

the memory for storing data and instructions for the transmitter and the processor;

the transmitter is configured to transmit the third data to the second communication device at the transmission time of the third data, and then transmit the second data to the second communication device at the start time of the second data.

11. The communications device of claim 10, wherein the first communications device further comprises: a radio frequency transceiver module, wherein,

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

the processor is further configured to control the radio frequency transceiver module to perform transceiver switching at an initial time of the transceiver switching;

the processor is further configured to control the transmitter to transmit the third data to the second communication device at a transmission time of the third data and then transmit the second data to the second communication device at a start time of the second data after the transceiver is switched to the end.

12. The communications device of claim 11, wherein the processor is further configured to determine whether the first communications device satisfies an advanced transceiving switching condition according to the cyclic prefix CP length information of the first transceiving interval and a last time unit for transmitting the first data after determining an end time of the first data and a start time of the second data.

13. The communications device of claim 12, wherein the processor is further configured to determine the advance amount according to CP length information of a last time unit for transmitting the first data when the first communications device satisfies the handover condition for advanced transceiving.

14. The communication device according to any one of claims 10 to 13, 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 perform transceiver switching at an end time of the first data when the first data is transmitted through a single carrier or multiple synchronous carriers; and when the transceiver switching is finished, controlling the transmitter to transmit the third data to the second communication device at the finishing moment of the transceiver switching and then transmit the second data to the second communication device at the starting moment of the second data.

15. The communication device according to any one of claims 10 to 13, 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 perform transceiver switching at a time when transmission of the first data is finished at the latest when the first data is transmitted through a plurality of asynchronous carriers; when the transceiver switch is over, controlling the transmitter to transmit the third data to the second communication device at the end time of the transceiver switch, and then to transmit the second data to the second communication device at the start time of the second data.

16. The communication device according to any one of claims 10 to 13, wherein the first communication device further comprises: a receiver for receiving, at a receiver, wherein,

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

the processor is further configured to determine that the second communications device indicates acquisition of the LBT parameter by the first communications device;

the processor is further configured to acquire the LBT parameter according to the first transceiving interval or the second transceiving interval.

17. The communication device according to any of claims 10 to 13, wherein the processor is further configured to obtain first scheduling information and fourth scheduling information configured by the second communication device, where the first scheduling information is used for scheduling the first data, and the fourth scheduling information is used for scheduling the second data;

the processor is further configured to determine an end time of the first data according to a time domain information indication of the first scheduling information; and determining the starting time of the second data according to the time domain information indication of the fourth scheduling information and preset timing advance information TA.

18. The communication device according to any one of claims 10 to 13, 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, and the length of the third data is equal to the advance.

19. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1-9.