CN110971377A

CN110971377A - Data transmission method and device

Info

Publication number: CN110971377A
Application number: CN201811163232.3A
Authority: CN
Inventors: 陈曦; 张鹏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-09-30
Filing date: 2018-09-30
Publication date: 2020-04-07
Anticipated expiration: 2038-09-30
Also published as: CN110971377B

Abstract

The embodiment of the application discloses a data transmission method and a data transmission device, which are used for demodulating a data channel. The method provided by the embodiment of the application comprises the following steps: the eMBB terminal determines the preempted time domain position or the time domain position needing power adjustment or the time domain position possibly interfered by the transmitting power of the URLLC terminal according to the indication information of the base station, and correspondingly determines to send a new DMRS on the time domain position needing the newly added DMRS, so that the newly added DMRS can be used for demodulating the data of the eMBB terminal, and the eMBB data transmission efficiency is improved.

Description

Data transmission method and device

Technical Field

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

Background

In order for the receiver to recover the original information of the transmitting end from the received signal, it is necessary to know the channel information of one transmission for demodulating the transmission. Channel information can be obtained by measuring the reference signal transmitted by the transmitter, and this process is called channel estimation.

The channel information obtained by the reference signal can be used for demodulation of a data channel that has undergone an approximate wireless channel. Signal distortion occurs when a signal is transmitted in a wireless channel, and the change is reflected in both the amplitude and the phase of the signal. If channel information estimated from a reference signal transmitted on a certain symbol is required to be used for demodulation of a data channel transmitted on other symbols, the phase between the symbol on which the reference signal is transmitted and the symbol on which the data channel is transmitted needs to be continuously varied rather than abruptly varied. In addition, when the amplitude difference of the transmission power between the symbol transmitting the reference signal and the symbol transmitting the data channel is large, the channel information obtained by using the reference signal may not be used for demodulation of the data channel. Generally, in order for a terminal to obtain channel information through a reference signal, the terminal and a base station need to agree on a transmission position of the reference signal and related transmission parameters.

In the prior art, channel information obtained by a predetermined reference signal is applied to demodulation of a data channel for one data transmission. However, when the data channel is suddenly power-changed or suddenly interfered during one transmission, the data channel may not be correctly demodulated.

Disclosure of Invention

The embodiment of the application provides a data transmission method and a data transmission device, which are used for transmitting a reference signal according to the indication of a base station to demodulate a data channel.

A first aspect of the embodiments of the present application provides a data transmission method, including: receiving indication information from a base station, wherein the indication information comprises information of a first time domain position; determining a second time domain position according to the information of the first time domain position; and transmitting a reference signal at the determined second time domain position, wherein the reference signal is used for demodulating a data channel.

The method is used for demodulating a data channel. After the terminal determines the indication information of the base station, the terminal can determine the preempted time domain position or determine the time domain position needing to adjust the power or determine the time domain position possibly interfered by the state change of other terminal signals, and correspondingly determine to send a new reference signal on the time domain position needing to be added with the reference signal, so that the added reference signal can be used for demodulating the data of the terminal, and the efficiency of data transmission can be improved.

In a possible implementation manner of the first aspect, the first time domain position is a symbol position of the power variation.

In a possible implementation manner of the first aspect, the second time domain position is within a target time domain range, and the target time domain range is a time domain range with the first time domain position as a starting point.

In a possible implementation manner of the first aspect, the target time domain range is a time domain range from a first symbol position of the power variation as a starting point to a previous symbol position of a second symbol position of the power variation, the second symbol position being subsequent to the first symbol position, the first symbol position and the second symbol position being one of the first time domain positions.

In one possible implementation manner of the first aspect, the second symbol position is a symbol position with a shortest time interval from the first symbol position.

In a possible implementation manner of the first aspect, the first time domain position is a symbol position of a state change of the other terminal signal, and the state change of the other terminal signal includes a presence of the other terminal signal becoming an absence of the other terminal signal, or an absence of the other terminal signal becoming a presence of the other terminal signal.

In a possible implementation manner of the first aspect, the target time domain range is a time domain range with the first time domain position as a starting point.

In a possible implementation manner of the first aspect, the target time domain range is a time domain range from a first symbol position of the state change of the other terminal signal to a previous symbol position from a start point to a second symbol position of the state change of the other terminal signal, the second symbol position being subsequent to the first symbol position, and the first symbol position and the second symbol position being one of the first time domain positions.

In a possible implementation manner of the first aspect, the transmitting the reference signal at the determined second time domain position includes: and transmitting the reference signal at the determined second time domain position under the condition that the reference signal is not configured in the target time domain range.

In a possible implementation manner of the first aspect, the transmitting the reference signal at the determined second time domain position includes: and if the number of the symbols in the target time domain range is judged to be greater than or equal to a preset threshold value, transmitting a reference signal at the determined second time domain position.

In a possible implementation manner of the first aspect, the transmitting the reference signal at the determined second time domain position includes: transmitting the reference signal in a puncturing manner; or, the reference signal is transmitted in a rate matching manner; or, if the time length required for sending the reference signal is judged to be greater than or equal to a first preset threshold value, the reference signal is sent in a punching mode; if the time length required for sending the reference signal is judged to be less than the first preset threshold value, the reference signal is sent in a rate matching mode; or, if the time length required for sending the reference signal is judged to be greater than a second preset threshold value, the reference signal is sent in a punching mode; and if the time length required for sending the reference signal is judged to be less than or equal to the second preset threshold value, sending the reference signal in a rate matching mode.

In one possible implementation manner of the first aspect, the transmitting the reference signal includes: and transmitting the reference signal according to a transmission mode indicated by the indication information, wherein the transmission mode is puncturing or rate matching.

A second aspect of the embodiments of the present application provides a data transmission method, including: sending indication information to a terminal, wherein the indication information comprises information of a first time domain position, and the information of the first time domain position is used for determining a second time domain position; receiving a reference signal located at the second time domain position from the terminal; the data channel is demodulated based on the reference signal.

The base station may send, according to a service requirement, for example, when the service is concurrent or is affected by interference of signal state changes of other terminals and the like, indication information to the terminal, where the indication information carries information of the first time domain position and is used to determine a second time domain position of the reference signal, and after receiving the reference signal from the terminal and located at the second time domain position, the base station may demodulate a data channel according to the reference signal.

In the data transmission method provided by the embodiment of the application, the base station may send the indication information to the terminal, so that the reference signal is sent at the determined second time domain position, and thus, when the channel information changes, the base station may correctly demodulate the data channel according to the reference signal sent at the second time domain position by the terminal.

In a possible implementation manner of the second aspect, the first time domain position information is a symbol position of a power variation.

In one possible implementation of the second aspect, the second temporal location is within a target temporal range; the target time domain is a time domain range with a position determined according to the first time domain position information as a starting point.

In one possible implementation of the second aspect, the target time domain range includes a time domain range from a first symbol position of the power variation as a starting point to a previous symbol position of a second symbol position of the power variation, the second symbol position being subsequent to the first symbol position, the first symbol position and the second symbol position being one of the first time domain positions.

In one possible implementation form of the second aspect, the second symbol position is a symbol position that is the shortest time apart from the first symbol position.

In one possible implementation manner of the second aspect, the first time domain position is a symbol position of a state change of the other terminal signal, and the state change of the other terminal signal includes that the other terminal signal exists or does not exist or changes to exist.

In a possible implementation manner of the second aspect, the target time domain range is a time domain range with the first time domain position as a starting point.

In a possible implementation manner of the second aspect, the target time domain range is a time domain range from a first symbol position of the state change of the other terminal signal to a previous symbol position from a start point to a second symbol position of the state change of the other terminal signal, the second symbol position being subsequent to the first symbol position, and the first symbol position and the second symbol position being one of the first time domain positions.

In a possible implementation manner of the second aspect, the receiving the reference signal located at the second time domain position from the terminal specifically includes: and receiving the reference signal at the second time domain position under the condition that the reference signal is not configured in the target time domain range.

In a possible implementation manner of the second aspect, the receiving a reference signal at the second time domain position specifically includes: and if the number of the symbols in the target time domain range is judged to be greater than or equal to a preset threshold value, receiving the reference signal at the second time domain position.

In a possible implementation manner of the second aspect, the receiving the reference signal located at the second time domain position from the terminal includes: receiving the data channel in a puncturing manner; or, receiving the data channel in a rate matching manner; or, if the time length required for sending the reference signal is judged to be greater than or equal to a first preset threshold value, the data channel is received in a punching mode; if the time length required for sending the reference signal is judged to be less than the first preset threshold value, receiving the data channel in a rate matching mode; or, if the time length required for sending the reference signal is judged to be greater than a second preset threshold value, receiving the data channel in a punching mode; and if the time length required for sending the reference signal is judged to be less than or equal to the second preset threshold value, receiving the data channel in a rate matching mode.

In a possible implementation manner of the second aspect, the indication information is used to indicate a transmission manner for transmitting the reference signal, and the transmission manner is puncturing or rate matching.

A third aspect of the embodiments of the present application provides a data transmission method, including: receiving indication information from a base station, wherein the indication information is used for determining a time domain position; a reference signal is transmitted at the time domain location, the reference signal being used to demodulate the data channel.

In a possible implementation manner of the third aspect, the transmitting the reference signal at the time domain position includes: transmitting the reference signal in a puncturing manner; or, the reference signal is transmitted in a rate matching manner; or, if the time length required for sending the reference signal is judged to be greater than or equal to a first preset threshold value, the reference signal is sent in a punching mode; and if the time length required for sending the reference signal is judged to be less than the first preset threshold value, sending the reference signal in a rate matching mode.

In a possible implementation manner of the third aspect, the transmitting the reference signal at the time domain position includes: and transmitting the reference signal according to a transmission mode indicated by the indication information, wherein the transmission mode is puncturing or rate matching.

In a possible implementation manner of the third aspect, the indication information is carried in physical layer signaling, and the indication information includes a bitmap used for determining the time domain position.

In one possible implementation manner of the third aspect, the method includes: receiving a Radio Resource Control (RRC) signaling from network equipment, wherein the RRC signaling comprises at least one bitmap for determining the time domain position; or, receiving a physical layer signaling from the network device, where the physical layer signaling includes index information for determining a target bitmap, or the physical layer signaling includes a deactivated index, that is, the reference signal is not added. The target bitmap is used to determine the time domain position.

A fourth aspect of the present embodiment provides a data transmission method, including: sending indication information to a terminal, wherein the indication information is used for indicating the time domain position of a reference signal; receiving the reference signal at the time domain position sent by the terminal; the data channel is demodulated based on the reference signal.

In a possible implementation manner of the fourth aspect, the receiving the reference signal at the time domain position sent by the terminal includes: receiving the data channel in a puncturing mode or a rate matching mode; or, if the time length required for sending the reference signal is judged to be greater than or equal to a first preset threshold value, the data channel is received in a punching mode; and if the time length required for sending the reference signal is judged to be less than the first preset threshold value, receiving the data channel in a rate matching mode.

In a possible implementation manner of the fourth aspect, the indication information is used to indicate a transmission manner for transmitting the reference signal, where the transmission manner is puncturing or rate matching.

In a possible implementation manner of the fourth aspect, the indication information is carried in physical layer signaling, and the indication information includes a bitmap used for determining the time domain position.

In a possible implementation manner of the fourth aspect, a radio resource control RRC signaling is sent to the terminal, where the RRC signaling includes at least one bitmap for determining the time domain position; or, sending a physical layer signaling to the terminal, where the physical layer signaling includes index information for determining a target bitmap, and the target bitmap is used for determining the time domain position.

A fifth aspect of embodiments of the present application provides a communication apparatus, where the communication apparatus has a function of implementing a terminal in the first aspect or any possible implementation manner of the first aspect, or a function of implementing a terminal in the third aspect or any possible implementation manner of the third aspect.

In one possible implementation manner of the fifth aspect, the communication device is a terminal or a chip applied to the terminal.

A fifth aspect of an embodiment of the present application provides a communication apparatus, including: a receiving module, configured to receive indication information from a base station, where the indication information includes information of a first time domain location; a determining module, configured to determine a second time domain position according to the information of the first time domain position; and a sending module, configured to send a reference signal at the determined second time domain position, where the reference signal is used to demodulate a data channel.

In one possible implementation manner of the fifth aspect, the first time domain position is a symbol position of the power variation.

In a possible implementation manner of the fifth aspect, the second time domain position is within a target time domain range, and the target time domain range is a time domain range with the first time domain position as a starting point.

In a possible implementation form of the fifth aspect, the target time domain range is a time domain range starting from a first symbol position of the power variation to a previous symbol position of a second symbol position of the power variation, the second symbol position being subsequent to the first symbol position, the first symbol position and the second symbol position being one of the first time domain positions.

In one possible implementation form of the fifth aspect, the second symbol position is a symbol position that is the shortest time apart from the first symbol position.

In one possible implementation manner of the fifth aspect, the first time domain position is a symbol position of a state change of the other terminal signal, and the state change of the other terminal signal includes that the other terminal signal exists or does not exist or changes to exist.

In a possible implementation manner of the fifth aspect, the target time domain range is a time domain range from a first symbol position of the state change of the other terminal signal to a previous symbol position from a start point to a second symbol position of the state change of the other terminal signal, the second symbol position being subsequent to the first symbol position, and the first symbol position and the second symbol position being one of the first time domain positions.

In a possible implementation manner of the fifth aspect, the sending module is specifically configured to: and transmitting the reference signal at the determined second time domain position under the condition that the reference signal is not configured in the target time domain range.

In a possible implementation manner of the fifth aspect, the sending module is specifically configured to: and if the number of the symbols in the target time domain range is judged to be greater than or equal to a preset threshold value, transmitting a reference signal at the determined second time domain position.

In a possible implementation manner of the fifth aspect, the sending module is specifically configured to: transmitting the reference signal in a puncturing manner; or, the reference signal is transmitted in a rate matching manner; or, if the time length required for sending the reference signal is judged to be greater than or equal to a first preset threshold value, the reference signal is sent in a punching mode; and if the time length required for sending the reference signal is judged to be less than the first preset threshold value, sending the reference signal in a rate matching mode.

In a possible implementation manner of the fifth aspect, the sending module is specifically configured to: and transmitting the reference signal according to a transmission mode indicated by the indication information, wherein the transmission mode is puncturing or rate matching.

A sixth aspect of embodiments of the present application provides a communication apparatus, which has a function of implementing a base station in the second aspect or any possible implementation manner of the second aspect, or a function of implementing a base station in any possible implementation manner of the fourth aspect or the fourth aspect.

In a possible implementation manner of the sixth aspect, the communication device is a base station or a chip applied to the base station.

A sixth aspect of the embodiments of the present application provides a communication apparatus, including: a sending module, configured to send indication information to a terminal, where the indication information includes information of a first time domain position, and the information of the first time domain position is used to determine a second time domain position; a receiving module, configured to receive a reference signal located at the second time domain position from a terminal; and the demodulation module is used for demodulating the data channel according to the reference signal.

In a possible implementation manner of the sixth aspect, the first time domain position information is a symbol position of a power change.

According to the sixth aspect of the present embodiment or the first implementation manner of the sixth aspect of the present embodiment, in the second implementation manner of the sixth aspect of the present embodiment, the target time domain is a time domain range with a position determined according to the first time domain position information as a starting point.

In a possible implementation manner of the sixth aspect, the target time domain range is a time domain range starting from a first symbol position of the power variation to a previous symbol position of a second symbol position of the power variation, the second symbol position being subsequent to the first symbol position, the first symbol position and the second symbol position being one of the first time domain positions.

In a possible implementation manner of the sixth aspect, the second symbol position is a symbol position with a shortest time interval from the first symbol position.

In a possible implementation manner of the sixth aspect, the first time domain position is a symbol position of a state change of the other terminal signal, and the state change of the other terminal signal includes that the other terminal signal exists or does not exist or changes to exist.

In a possible implementation manner of the sixth aspect, the second time domain position is within a target time domain range, and the target time domain range is a time domain range with the first time domain position as a starting point.

In a possible implementation manner of the sixth aspect, the target time domain range is a time domain range from a first symbol position of the state change of the other terminal signal to a previous symbol position from a start point to a second symbol position of the state change of the other terminal signal, the second symbol position being subsequent to the first symbol position, and the first symbol position and the second symbol position being one of the first time domain positions.

In a possible implementation manner of the sixth aspect, the receiving module is specifically configured to: and receiving the reference signal at the second time domain position under the condition that the reference signal is not configured in the target time domain range.

In a possible implementation manner of the sixth aspect, the receiving module is specifically configured to: and if the number of the symbols in the target time domain range is judged to be greater than or equal to a preset threshold value, receiving the reference signal at the second time domain position.

In a possible implementation manner of the sixth aspect, the receiving module is specifically configured to: receiving the data channel in a puncturing manner; or, receiving the data channel in a rate matching manner; or, if the time length required for sending the reference signal is judged to be greater than or equal to a first preset threshold value, the data channel is received in a punching mode; and if the time length required for sending the reference signal is judged to be less than the first preset threshold value, receiving the data channel in a rate matching mode.

In a possible implementation manner of the sixth aspect, the indication information is used to indicate a transmission manner for transmitting the reference signal, where the transmission manner is puncturing or rate matching.

A seventh aspect of embodiments of the present application provides a computer program product, which includes instructions that, when executed on a computer, cause the computer to perform the method in the first to fourth aspects and their respective implementations.

An eighth aspect of the embodiments of the present application provides a computer-readable storage medium, which stores instructions that, when executed on a computer, implement the method of each of the embodiments provided in the first to fourth aspects of the embodiments of the present application.

According to the technical scheme, the embodiment of the application has the following advantages:

according to the method or the device of the embodiment of the application, after the terminal determines the indication information of the base station, the terminal can determine the preempted time domain position or the time domain position needing power adjustment or the time domain position possibly interfered by the state change of other terminal signals, and correspondingly determines to send the new reference signal on the time domain position needing the new reference signal, so that the new reference signal can be used for demodulating the data of the terminal, and the efficiency of data transmission can be improved.

Drawings

Fig. 1 is a schematic diagram of transmission resources multiplexed by an eMBB service and a URLLC service;

fig. 2 is a schematic diagram of an embodiment of a data transmission method for an eMBB service in an embodiment of the present application;

FIG. 3 is an interactive flowchart of a data transmission method according to an embodiment of the present application;

fig. 4 is a schematic diagram of another embodiment of a data transmission method for an eMBB service in an embodiment of the present application;

FIG. 5 is another interactive flowchart of a data transmission method in an embodiment of the present application;

FIG. 6 is a diagram of an embodiment of a terminal in an embodiment of the application;

fig. 7 is a schematic diagram of an embodiment of a base station in the embodiment of the present application;

fig. 8 is a schematic diagram of an embodiment of a terminal in the embodiment of the present application;

fig. 9 is a schematic diagram of an embodiment of a base station in the embodiment of the present application.

Detailed Description

The embodiment of the application provides a data transmission method, which is used for transmitting a reference signal to a base station, so that a data channel transmitted in a time period with power change or interference of state change of other terminal signals can be correctly demodulated.

The data transmission method provided by the embodiment of the application is suitable for various wireless communication systems, and can be applied to the fifth generation (5)^thgeneration, 5G) New Radio (NR) system in a mobile communication system or a future mobile communication system, which is not limited in the present application.

The sending and receiving method of the data channel provided by the embodiment of the present application may be applied to communication between two terminals or two network devices, and the following description of the embodiment of the present application takes communication between a base station and a terminal as an example.

The terminal according to the embodiments of the present application may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, which have wireless communication functions, and various forms of User Equipment (UE), Mobile Stations (MS), terminal equipment (terminal equipment), and the like. The embodiment of the present application does not limit the specific technology and the specific device form adopted by the terminal device.

The base station according to the embodiments of the present application may include various devices providing a communication function for a terminal in a radio access network, for example, macro base stations, micro base stations, relay stations, access points, and the like in various forms. In systems using different radio access technologies, the names of base stations may be different, for example, in future communication mobile communication systems, referred to as next generation node B (gNB); in a Long Term Evolution (LTE) network, referred to as an evolved node B (eNodeB), eNB for short; in third generation 3G networks, referred to as node b (node b), and so on. The embodiments of the present application do not limit the specific technology and the specific device form adopted by the base station.

In order to distinguish from the original demodulation reference signal (DMRS), the reference signal determined to be transmitted according to the data transmission method in the embodiment of the present application is referred to as a preemptive-demodulation reference signal (P-DMRS). It is to be understood that the P-DMRS herein is only a name for convenience of description and does not constitute a limitation of the present application, and is a reference signal for data channel demodulation in nature.

For better understanding and implementation of the solution of the embodiment of the present application, a specific application scenario is described below, please refer to a schematic diagram of a method for multiplexing transmission resources for enhanced mobile broadband (eMBB) service and ultra-high reliable low latency communication (URLLC) service in fig. 1.

The uplink data traffic is carried on a Physical Uplink Shared Channel (PUSCH) in the physical layer for transmission. Taking the eMBB service as an example, part of symbols in all symbols transmitted at one time are used to carry reference signals, i.e., DMRSs. When two uplink data services of eMBB and URLLC exist at the same time, the URLLC service needs to occupy higher scheduling priority with higher time delay and reliability requirements. The symbols in the embodiments of the present application are all referred to as time domain symbols, if not specifically stated. The time domain symbol in the present application may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol, or may also be a single carrier frequency division multiple access (SC-FDMA), where SC-FDMA is also called an orthogonal frequency division multiplexing with transform precoding (OFDM with TP). The time-frequency resource may be understood as a resource of multiplying a time domain by a frequency domain bandwidth, and in the embodiment of the present application, the time-frequency resource for transmitting the reference signal may be further determined when the time-domain position for transmitting the reference signal is determined.

When URLLC service data needs to be sent from a URLLC terminal to a base station, and the base station does not have enough time-frequency resources for scheduling the URLLC service data, the base station may first allocate a first time-frequency resource to the URLLC terminal for transmitting the URLLC service data, and then issue new scheduling information to an eMBB terminal that sends eMBB service data: the eBB terminal is required to adjust the power of a signal carrying a data channel in the eBB service to zero on a first time-frequency resource, wherein the first time-frequency resource is used for transmitting URLLC service data of the URLLC terminal; or the eMBB terminal is required to perform power reduction transmission on the first time-frequency resource according to the configured power control parameter, so that the interference on the URLLC service data transmitted on the first time-frequency resource is reduced.

In a possible implementation manner, an eMB terminal adjusts the power of a signal carrying a data channel in an eMB service to zero on a first time-frequency resource according to a base station instruction, wherein the first time-frequency resource is used for transmitting URLLC service data of the URLLC terminal, and the eMB terminal is referred to as an eMB puncturing scheme in the application;

in another possible implementation manner, the eMBB terminal adjusts, according to a base station instruction, power of a signal carrying a data channel in the eMBB service on a first time-frequency resource, where the first time-frequency resource is used for transmitting URLLC service data of the URLLC terminal, which is referred to as an eMBB power control scheme in this embodiment of the present application.

Since the signal itself after the power change undergoes an additional unknown phase change relative to the signal before the change, the symbols before and after the change cannot be demodulated using the same channel estimation result.

On the other hand, if the eMBB service and the URLLC service are both transmitted at non-zero power during multiplexing, the multiplexed resources may have interference of the URLLC service on the eMBB service, and if demodulation is performed only according to the original reference signal, the accuracy is low.

In order to facilitate understanding of the technical solution of the present application, a data transmission method in the embodiment of the present application is described below by using a specific embodiment.

Referring to fig. 2, an embodiment of a data transmission method for an eMBB service in the embodiment of the present application is illustrated.

When the base station normally schedules an eMB terminal, if the base station needs to schedule a URLLC terminal with higher priority to transmit in the scheduling resource. The base station issues new scheduling information to the scheduled eMB terminal to require the terminal to adjust eMB service power to zero in a specific time-frequency resource range.

And carrying the uplink service data on the PUSCH for transmission. A full transmission may comprise one slot or multiple slots, with a slot comprising multiple symbols, without limitation. In this embodiment and the following embodiments, a slot is transmitted completely at a time, and a slot includes 14 symbols. Most of the time-frequency resources in one time slot are used for transmitting service data, and part of the time-frequency resources are used for carrying the DMRS. As shown in fig. 2, the terminal may transmit the DMRS at a specific location according to the indication of the base station or according to the definition of the protocol, e.g., transmit the DMRS at the third time-domain symbol in the slot.

In the eMBB puncturing scheme, when there is a URLLC, if the base station needs to preferentially schedule a URLLC terminal to perform data transmission, the terminal may adjust the power of the eMBB service at the 5 th to 8 th symbol positions to zero under the instruction of the base station, and continue the transmission of the eMBB service from the 9 th symbol position. Since the power of the 5 th symbol position is adjusted to 0 and the power of the 9 th symbol position starts to be increased, the phase of the symbol before and after the change is not continuously changed due to the power change, so that the symbol before and after the change cannot be demodulated by using the same channel estimation result. As shown in fig. 2, after the power change in the middle of the eMBB transmission, the phase of the subsequent second partial symbol interval is not continuous with the phase of the first partial symbol, although the continuity between the symbols is maintained. The signal after the power change undergoes an additional unknown phase change relative to the signal before the power change, which causes that the result of channel estimation performed by the DMRS cannot completely reflect the channel change experienced by the signal transmitted at the second part of symbol positions after the power change, so that the data transmitted at the second part of symbol positions cannot be demodulated correctly.

In this embodiment, when the base station schedules a URLLC service with high priority, the base station may send indication information to the eMBB terminal, where the indication information includes symbol position information of power change, and the symbol position of power change refers to a symbol position with power change compared with the previous symbol power, such as a 5 th symbol position and a 9 th symbol position in fig. 2. The terminal can determine the position of transmitting the reference signal, i.e., the P-DMRS, according to the power-varied symbol position information. Because the eMBB service power corresponding to the 5 th to 8 th symbol positions is adjusted to be zero, the terminal may determine the time domain position for transmitting the P-DMRS according to the 9 th symbol position whose power is increased by 0, and optionally, the terminal may determine to transmit the P-DMRS at the 9 th symbol position. The P-DMRS may thus be used to demodulate data transmitted at the second fractional symbol position.

Referring to fig. 3, an interactive flowchart of a data transmission method in an embodiment of the present application is shown.

301. A base station transmits Radio Resource Control (RRC) signaling to a terminal;

the base station may send RRC signaling to the terminal, where the RRC signaling carries information of the first time domain location. The RRC signaling may be transmitted by the base station to the terminal in a unicast, multicast or broadcast form. Through RRC signaling, the terminal and the base station may agree on a default configuration for transmitting the reference signal.

Alternatively, the base station may agree with the terminal for one or more default configurations. The base station may perform one of the default configurations by physical layer signaling indication. The default configuration for transmitting reference signals includes: the format of the transmitted reference signal and the transmission mode of the reference signal. The reference signal is in the form of one or more symbols occupied by one reference signal in the time domain, and the transmission mode of the reference signal includes mapping the reference signal in the data channel in a puncturing mode and a rate matching mode. The form and transmission method of the reference signal are not limited herein.

Optionally, the first time domain position is a symbol position with power change, and the symbol position with power change means that there may be one or more symbol positions with power change compared with the previous symbol power, which is not limited herein.

It should be noted that step 301 is an optional step, and may be executed in conjunction with step 302, or may not be executed, and is not limited herein.

302. A base station sends a physical layer signaling to a terminal;

the base station sends physical layer signaling to the terminal, which may be sent by the base station to the terminal in unicast, multicast, or broadcast form.

Optionally, if step 301 is executed, the physical layer signaling includes indication information of default configuration for sending the reference signal, for example, three default configurations are agreed in step 301, and the physical layer signaling may carry information using a second default configuration.

Optionally, if step 301 is not executed, the physical layer signaling carries information of the first time domain position;

optionally, the first time domain position is a symbol position of power change, which may be a symbol position of power increase, or a symbol position of power decrease, and there may be one or more symbol positions of power change, which is not limited herein.

For example, referring to fig. 2, for a scheduled eMBB terminal, the base station may send dynamic UL PI signaling to the eMBB terminal, notify that the eMBB service is not transmitted in the interval from the 5 th symbol position to the 8 th symbol position, and continue to transmit after the interval. That is, the UL PI signaling carries information of the 5 th symbol position where the power is reduced to zero and the 9 th symbol position where the power is increased from zero.

303. The terminal determines a second time domain position;

and after receiving the physical layer signaling sent by the base station, the terminal determines a second time domain position according to the first time domain position, wherein the second time domain position is a position for sending the reference signal.

Optionally, the second time domain position may be an nth symbol position after the first time domain position, where N is a non-negative integer, and it is understood that if the second time domain position is a 0 th symbol position after the first time domain position, it is determined that the second time domain position is located at the first time domain position. In one possible embodiment, N may be determined from a physical layer signaling indication; in another possible implementation, N may be agreed in advance by the terminal and the base station without any signaling; in another possible embodiment, N may be determined according to a radio resource control RRC signaling indication from the base station, for example, when the terminal establishes a connection with the base station, a specific value of N is agreed by RRC signaling. Here, the specific numerical value represented by N is not limited.

For example, when the eMBB terminal receives the UL PI indication from the base station, the terminal may determine the 0 th position after the 9 th symbol position where the power is increased from zero, that is, the 9 th symbol position is the second time domain position.

Optionally, since there may be one or more first time domain positions, the terminal may determine one or more second time domain positions according to one first time domain position, or may determine a plurality of second time domain positions according to a plurality of first time domain positions.

Optionally, the form of the reference signal may be consistent with the DMRS originally used for the data transmission, and the form of the reference signal is the number of symbols occupied by one reference signal in the time domain, for example, the number of symbols may be one symbol length, or may be two symbol lengths, where the form of the reference signal is not limited herein. If the symbol length occupied by the reference signal in the time domain is longer than one symbol length, the second time domain position may be understood as the time domain position where the reference signal starts to be transmitted.

304. The terminal determines that no reference signal is configured in the target time domain range;

the terminal can determine a target time domain range according to first time domain position information carried in a physical layer signaling sent by the base station, and further judge whether a reference signal is not configured in the target time domain range.

Optionally, the target time domain range is a time domain range with the first symbol position as a starting point, the length of the time domain range is not limited, and when there are a plurality of first time domain positions with varying power, the target time domain range may be a time domain range with the first symbol position with varying power as a starting point to a previous symbol position of the second symbol position with varying power. In fig. 2, the 9 th symbol position is the first symbol position, the target time domain range may be a time domain range with the 9 th symbol position as a starting point, for example, the target time domain range may be from the 9 th symbol position to the 14 th symbol position at which the transmission is ended. In addition, the 5 th to 8 th symbol positions may also be the target time domain range. It is to be understood that since the terminal power is zero at the 5 th to 8 th symbol positions, the reference signal may not be configured.

Optionally, the second symbol position is a symbol position with a shortest time interval from the first symbol position. For example, when there are three first time domain positions, the time interval between the first symbol position and the second symbol position is shorter than the time interval between the first symbol position and the third symbol position in chronological order, and thus the target time domain range is determined as the time domain range from the first symbol position as the starting point to the previous symbol position of the second symbol position.

It should be noted that step 304 is an optional step, and may or may not be executed, and is not limited herein.

305. The terminal judges that the number of the symbols in the target time domain range is greater than or equal to a preset threshold value;

after the terminal determines the target time domain range, it may further determine whether the number of symbols in the target time domain range is greater than or equal to a preset threshold.

Optionally, the preset threshold may be determined according to a physical layer signaling dynamic indication; or, the terminal and the base station may agree in advance, for example, when the terminal and the base station establish a connection, the agreement is made through RRC signaling. Here, the size and setting manner of the preset threshold are not limited. Illustratively, the terminal and the base station agree through RRC signaling that the preset threshold is 2 symbol lengths, and the terminal determines that the number of symbols in the target time domain range from the 9 th symbol position to the 14 th symbol position is 6, which is greater than 2 symbol lengths.

It should be noted that step 305 is an optional step, and may or may not be executed, and is not limited herein.

306. The terminal determines a sending mode of the reference signal;

the terminal may select a transmission mode of the reference signal, and optionally, the terminal may map the reference signal in a data channel for transmission through a puncturing mode or a rate matching mode.

The rate matching mode changes the mapping relationship between the original data signal and the time frequency resource. The terminal performs resource mapping again with reference to the mapping position of the reference signal. A time-frequency resource may be understood as a resource that is a time domain multiplied by a frequency domain bandwidth. The rate matching needs to change the mapping relation, so that the processing time is relatively long;

the puncturing means that the data signal at the position where the reference signal needs to be mapped is replaced by the reference signal without changing the mapping relationship between the original data signal and the time-frequency resource. For example, there are some reference signals that need to be temporarily mapped to a specific time-frequency resource, and in a possible implementation scenario, the base station cannot accurately predict a grid that may be occupied by the reference signals in advance, or the terminal cannot perform rate matching on the data signals and the reference signals in time. In these cases, where mapping of signals to time-frequency resources is temporarily required, the terminal may map the reference signals on the data channel in a puncturing manner. Therefore, only the signals on the individual time frequency resources need to be replaced, and the processing time is short.

Optionally, the sending mode of the reference signal may be agreed by the terminal and the base station in advance, without any signaling transmission;

optionally, the sending mode of the reference signal may be based on an RRC signaling indication, for example, when the terminal establishes a connection with the base station, the sending mode of the reference signal is determined to be puncturing or rate matching through an RRC signaling;

optionally, the sending method of the reference signal may be determined according to a physical layer signaling indication, for example, the terminal determines that the sending method of the reference signal is puncturing or rate matching according to a dynamic UL PI signaling sent by the base station;

optionally, the terminal may determine a sending manner of the reference signal by whether rate matching can be implemented, which is specifically described below:

the terminal capability duration refers to a duration of operations such as terminal decoding dynamic signaling, uplink data processing, rate matching for adding a reference signal, and the like. Typically, the terminal capability is a recognized duration, here the first preset threshold and/or the second preset threshold.

The duration required for sending the reference signal refers to a time window from the terminal receiving the dynamic signaling of the base station, and may be several symbols. The end position of the window may be the second time domain position, or may be a time domain position N symbols before the second time domain position, where N is a given non-negative integer.

If the time length required for sending the reference signal is judged to be greater than or equal to a first preset threshold value, the reference signal is sent in a punching mode; if the time length required for sending the reference signal is judged to be less than the first preset threshold value, the reference signal is sent in a rate matching mode;

or, if the time length required for sending the reference signal is judged to be greater than a second preset threshold value, the reference signal is sent in a punching mode; and if the time length required for sending the reference signal is judged to be less than or equal to the second preset threshold value, sending the reference signal in a rate matching mode.

Illustratively, the first preset threshold is 4 symbol lengths, and if it is determined that the time length required for sending the reference signal is greater than or equal to 4 symbol lengths, the reference signal is sent in a puncturing manner; if the time length required for sending the reference signal is judged to be less than 4 symbol lengths, the reference signal is sent in a rate matching mode;

exemplarily, the second preset threshold is 3 symbol lengths, and if it is determined that the time length required for sending the reference signal is greater than 3 symbol lengths, the reference signal is sent in a puncturing manner; and if the time length required for sending the reference signal is judged to be less than or equal to 3 symbol lengths, sending the reference signal in a rate matching mode.

The form of transmitting the reference signal is not limited herein.

307. A terminal sends a reference signal to a base station;

and the terminal transmits the reference signal to the base station in a determined transmission mode according to the determined second time domain position.

308. The base station demodulates the data channel;

after receiving the reference signal sent by the terminal, the base station may perform channel estimation according to the reference signal to obtain channel information, and then demodulate a data channel to obtain original transmission information.

Optionally, the data channel is service data transmitted in a target time domain range, for example, the data channel transmitted in a second partial symbol range from the 9 th symbol position to the 14 th symbol position shown in fig. 2, and the P-DMRS may be applied to perform channel estimation to complete demodulation. It can be understood that for the data channel transmitted in the first part of symbol range, the original DMRS may be used for channel estimation to complete demodulation.

The data transmission method provided by the embodiment of the application aims at the problem that the phase of a signal after power control adjustment is discontinuous in complete transmission. And the base station receives the reference signal sent by the terminal at the second time domain position, so that the data channel of the discontinuous phase interval after the power change can be demodulated according to the reference signal.

For the scenario of multiplexing transmission resources of eBB service and URLLC service, when a base station normally schedules an eBB terminal, if the base station needs to schedule a URLLC terminal with higher priority for transmission in the scheduling resource. Interference of URLLC service to eMBB service may exist in the multiplexed transmission resources. Referring to fig. 4, an embodiment of a data transmission method for an eMBB service in the embodiment of the present application is illustrated.

When the base station normally schedules an eMB terminal, if the base station needs to schedule a URLLC terminal with higher priority to transmit in the scheduling resource. As shown in fig. 4, the URLLC service is transmitted in the 5 th to 8 th symbol position intervals in the eMBB service. The symbol position where the state of the other terminal signal changes, i.e., the symbol position where the other terminal signal exists to the symbol position where the other terminal signal does not exist, for example, the 9 th symbol position; or a symbol position where no other terminal signal is present becomes a symbol position where another terminal signal is present, for example, a 5 th symbol position. For eMBB traffic, a full transmission can be considered as being split into three parts in a graph. Wherein URLLC interference is present in the second part. Since the interfered symbol experiences a larger difference in channel characteristics from the non-interfered symbol, the demodulation accuracy is lower if the channel estimation result of the DMRS according to the first part is used for the second part interfered by the URLLC service.

It should be noted that the base station that transmits the symbol position information of the state change of the signal of the other terminal may be the base station of the cell of the terminal itself, or may be the base station of the neighboring cell, and is not limited herein. When the base station of the cell sends the symbol position of the state change of other terminal signals, the symbol information of the signal interference of the terminal of the adjacent cell can be obtained from the base station of the adjacent cell.

In this embodiment, the terminal may receive a physical layer signaling configuration sent by the base station or a radio resource control RRC signaling indication, where the indication information includes information of symbol positions of state changes of other terminal signals. Such as the 5 th symbol position and the 9 th symbol position in the figure. The terminal may determine a position at which the P-DMRS is transmitted, for example, at a 5 th symbol position, according to the symbol position information of the state change of the other terminal signal. The terminal may transmit the P-DMRS through puncturing or rate matching. In this way, when the data channel is demodulated, the base station can respectively perform channel estimation on the original DMRS and the added P-DMRS, the estimation result of the DMRS can be applied to the first part of symbol intervals and the third part of symbol intervals, the estimation result of the P-DMRS can be applied to the second part of symbol intervals, and finally, the demodulation result is unified to obtain the original transmission information.

Referring to fig. 5, another interactive flowchart of a data transmission method in the embodiment of the present application is shown.

501. A base station sends RRC signaling to a terminal;

the base station may transmit RRC signaling to the terminal, which may be transmitted by the base station to the terminal in a unicast, multicast or broadcast form. The RRC signaling carries information of the first time domain location. Through RRC signaling, the terminal and the base station may agree on a default configuration for transmitting the reference signal.

Optionally, the first time domain position is a symbol position of a state change of a signal of another terminal, where the state change of the signal of the other terminal may be due to service interference multiplexed by the cell, for example, URLLC service interference transmitted by a higher priority when an eMBB terminal transmits a data channel; may be traffic interference of a neighbor cell; and the interference can also be the interference of different systems, for example, other systems in the heterogeneous network may transmit signals at the same time domain position, namely the electromagnetic interference existing in the industrial wireless environment.

It should be noted that the information of the symbol position of the state change of the other terminal signal may refer to the state change information of the other terminal signal existing in the time domain position, and may also refer to the information of the state change of the other terminal signal existing in the time-frequency resource.

Optionally, the RRC signaling sent by the base station may indicate that there is time domain, frequency domain, or time-frequency domain location information of the state change of the other terminal signal. It will be appreciated that this information indicates that there is overlap between the time-frequency resources on which the current data channel is transmitted and the time-frequency resources of other terminal signals.

Optionally, the RRC signaling sent by the base station may indicate that there is time domain, frequency domain, or time-frequency domain location information of other terminal signals, and the terminal needs to obtain location information of the state change of the other terminal signals according to whether there is an overlap between the time domain, frequency domain, or resource location of the other terminal signals indicated by the base station and the current data channel transmission time-frequency resource of the terminal. For example, the neighboring base station indicates the time-frequency resource position of the neighboring signal through signaling, the terminal determines the overlapping condition of the current service and the time-frequency resource of the service indicated by the neighboring base station, and if the overlapping condition exists, the terminal determines the position of the state change of the signal of the other terminal and uses the position information to determine the first time-frequency resource.

It should be noted that step 501 is an optional step, and may be executed in cooperation with the physical layer signaling configuration indication, or may not be executed, which is not limited herein.

502. A base station sends a physical layer signaling to a terminal;

the base station may send physical layer signaling to the terminal according to the service requirement, and the physical layer signaling may be sent to the terminal by the base station in a unicast, multicast or broadcast manner.

Optionally, if step 501 is executed, the physical layer signaling includes indication information of default configuration for sending the reference signal, for example, three default configurations are agreed in step 501, and the physical layer signaling may carry information using a second default configuration.

Optionally, if step 501 is not executed, the physical layer signaling carries information of the first time domain position;

optionally, the first time domain position is a symbol position of a state change of a signal of another terminal, and the interference causing the state change of the signal of the other terminal may be multiplexed traffic interference, for example, URLLC traffic interference transmitted by a higher priority when an eMBB terminal transmits a data channel; in another embodiment, the interference may also be service interference from a neighboring cell of a cell to which the eMBB terminal belongs; in another embodiment, the interference may also be electromagnetic interference from a different system. The interference source causing the state change of other terminal signals is not limited herein;

Optionally, the physical layer signaling sent by the base station may indicate that there is time domain, frequency domain, or time-frequency domain location information of the state change of the other terminal signal. It will be appreciated that this information indicates that there is overlap between the time-frequency resources on which the current data channel is transmitted and the time-frequency resources of other terminal signals.

Optionally, the physical layer signaling sent by the base station may indicate that there is time domain, frequency domain, or time-frequency domain location information of other terminal signals, and the terminal needs to obtain location information of the state change of the other terminal signals according to whether there is an overlap between the time domain, frequency domain, or resource location of the other terminal signals indicated by the base station and the current data channel transmission time-frequency resource of the terminal. For example, the neighboring base station indicates the time-frequency resource position of the neighboring signal through signaling, the terminal determines the overlapping condition of the current service and the time-frequency resource of the service indicated by the neighboring base station, and if the overlapping condition exists, the terminal determines the position of the state change of the signal of the other terminal and uses the position information to determine the first time-frequency resource.

Optionally, the physical layer signaling specifies a form of a reference signal and a transmission mode of the reference signal, where the form of the reference signal is the number of symbols occupied by one reference signal in a time domain, the number of the reference signals may be one or more, and the transmission mode of the reference signal includes a puncturing mode and a rate matching mode. The form and transmission mode of the reference signal are not limited herein;

for example, referring to fig. 4, for a scheduled eMBB terminal, the base station may send physical layer signaling to the eMBB terminal to notify that there is a state change of other terminal signals at the 5 th symbol position and/or the 9 th symbol position, that is, interference of URLLC traffic varies from the absence to the presence at the 5 th symbol position and from the presence to the absence at the 9 th symbol position. That is, the dynamic physical layer signaling carries information of the 5 th symbol position and/or the 9 th symbol position of the state change of the other terminal signal.

Optionally, the base station that sends the symbol position information of the state change of the other terminal signal may be the base station of the cell of the terminal, or may be the base station of the neighboring cell, which is not limited herein. When the base station of the cell sends the symbol position of the state change of other terminal signals, the symbol information of the state change of the terminal signals of the neighboring cell can be obtained from the base station of the neighboring cell.

503. The terminal determines a second time domain position;

after receiving the RRC signaling or the physical layer signaling sent by the base station, the terminal may determine a second time domain position according to the first time domain position, where the second time domain position is a position for sending a reference signal.

Optionally, the second time domain position may be an nth symbol position after the first time domain position, where N is a non-negative integer, and it is understood that if the second time domain position is a 0 th symbol position after the first time domain position, it is determined that the second time domain position is located at the first time domain position. In one possible embodiment, N may be determined from a physical layer signaling indication; in another possible implementation, N may be agreed in advance by the terminal and the base station without any signaling; in another possible embodiment, N may be determined according to an RRC signaling indication from the base station, for example, when the terminal establishes a connection with the base station, a specific value of N is agreed through the RRC signaling. Here, the specific numerical value represented by N is not limited.

For example, after the eMBB terminal receives the physical layer signaling of the base station, the terminal may determine the 0 th position after the 5 th symbol position where interference exists, that is, the 5 th symbol position is the second time domain position.

Optionally, the form of the reference signal may be consistent with the DMRS originally used for the data transmission, and the form of the reference signal is the number of symbols occupied by one reference signal in the time domain, for example, the number of symbols may be one symbol length, or may be two symbol lengths, where the form of the reference signal is not limited herein. If the symbol length occupied by the reference signal is greater than one symbol length, the second time domain position may be understood as the time domain position where the reference signal starts to be transmitted.

504. The terminal judges that the target time domain range is not configured with a reference signal;

the terminal first time domain position information may determine a target time domain range, and further determine whether no reference signal is configured in the target time domain range.

Optionally, the target time domain range is a time domain range from a first symbol position of the state change of the other terminal signal as a starting point to a previous symbol position of a second symbol position of the state change of the other terminal signal, the second symbol position is after the first symbol position, the first symbol position and the second symbol position are one of the first symbol position, and the length of the time domain range is not limited. Illustratively, the 5 th symbol position through the 8 th symbol position in fig. 4. And the terminal judges that the reference signal is not configured in the target time domain range.

It should be noted that step 504 is an optional step, and may or may not be executed, and is not limited herein.

505. The terminal judges that the number of symbols in the target time domain range is greater than or equal to a preset threshold value;

Optionally, the preset threshold may be determined according to a physical layer signaling dynamic indication; the terminal and the base station can also be agreed in advance through RRC signaling. Here, the size and setting manner of the preset threshold are not limited. Illustratively, the terminal and the base station agree that the preset threshold is 2 symbol lengths through RRC signaling, and the terminal determines that the length of the second part of symbol intervals is greater than 2 symbol lengths.

It should be noted that step 505 is an optional step, and may or may not be executed, and is not limited herein.

506. The terminal determines a sending mode of the reference signal;

507. a terminal sends a reference signal to a base station;

steps 506 to 507 are similar to steps 306 to 307 in the embodiment corresponding to fig. 3, and are not described herein again.

508. The base station demodulates the data channel;

Optionally, the data channel is service data transmitted in a target time domain range, for example, the data channel transmitted in the second partial symbol position range shown in fig. 4, and the demodulation may be completed by applying P-DMRS for channel estimation. It can be understood that for the data channel transmitted in the first part of symbol range, the original DMRS may be used for channel estimation to complete demodulation.

The data transmission method provided by the embodiment of the application aims at the condition that the local channel characteristic change is large in complete transmission. The base station receives the reference signal sent by the terminal at the second time domain position, so that the demodulation accuracy of the data channel in the target time domain range can be improved.

The data transmission method according to the embodiment of the present application is introduced above, and the embodiment of the present application further provides a related apparatus for implementing the foregoing scheme.

As shown in fig. 6, the present application provides a communication device for implementing the functions of the terminal in the foregoing method embodiments, and the communication device may be the terminal or a chip applied to the terminal. The communication device includes:

a receiving module 601, configured to receive indication information from a base station, where the indication information includes information of a first time domain location;

a determining module 602, configured to determine a second time domain position according to the information of the first time domain position;

a sending module 603, configured to send a reference signal at the determined second time domain position, where the reference signal is used to demodulate a data channel.

Optionally, the first time domain position is a symbol position of the power change.

Optionally, the second time domain position is within a target time domain range, and the target time domain range is a time domain range with the first time domain position as a starting point.

Optionally, the target time domain range is a time domain range starting from a first symbol position of the power variation to a previous symbol position of a second symbol position of the power variation, the second symbol position being subsequent to the first symbol position, the first symbol position and the second symbol position being one of the first time domain positions.

Optionally, the second symbol position is a symbol position with a shortest time interval from the first symbol position.

Optionally, the first time domain position is a symbol position of a state change of the other terminal signal, where the state change of the other terminal signal includes that the other terminal signal exists or does not exist or changes to exist.

Optionally, the target time domain range is a time domain range from a first symbol position of the state change of the other terminal signal as a starting point to a previous symbol position of a second symbol position of the state change of the other terminal signal, the second symbol position is subsequent to the first symbol position, and the first symbol position and the second symbol position are one of the first time domain positions.

Optionally, the sending the reference signal at the determined second time domain position includes: and transmitting the reference signal at the determined second time domain position under the condition that the reference signal is not configured in the target time domain range.

Optionally, the sending the reference signal at the determined second time domain position includes: and if the number of the symbols in the target time domain range is judged to be greater than or equal to a preset threshold value, transmitting a reference signal at the determined second time domain position.

Optionally, the sending the reference signal at the determined second time domain position includes: transmitting the reference signal in a puncturing manner; or, the reference signal is transmitted in a rate matching manner; or, if the time length required for sending the reference signal is judged to be greater than or equal to a first preset threshold value, the reference signal is sent in a punching mode; and if the time length required for sending the reference signal is judged to be less than the first preset threshold value, sending the reference signal in a rate matching mode.

Optionally, the sending module 603 is specifically configured to: and transmitting the reference signal according to a transmission mode indicated by the indication information, wherein the transmission mode is puncturing or rate matching.

The communication device provided by the embodiment of the application aims at the problem of discontinuous signal phase after power control adjustment in complete transmission. The receiving module 601 may receive indication information from the base station, the determining module 602 may determine a second time domain position for sending the reference signal according to first time domain position information such as a power change symbol position carried by the indication information, and the terminal sending module 603 sends the reference signal sent at the second time domain position to the base station, so that a data channel in a discontinuous phase interval after power change may be demodulated according to the reference signal.

As shown in fig. 7, the present application provides another communication device, which is used to implement the functions of the base station in the foregoing method embodiments, and the communication device may be a base station, and may also be a chip applied to the base station.

The communication device includes:

a sending module 701, configured to send indication information to a terminal, where the indication information includes information of a first time domain position, and the information of the first time domain position is used to determine a second time domain position;

a receiving module 702, configured to receive a reference signal located at the second time domain position from a terminal;

a demodulation module 703 is configured to demodulate a data channel according to the reference signal.

Optionally, the first time domain position information is a symbol position of power variation.

Optionally, the second time domain position is within a target time domain range, and the target time domain is a time domain range with a position determined according to the first time domain position information as a starting point.

Optionally, the receiving module 702 is specifically configured to: and receiving the reference signal at the second time domain position under the condition that the reference signal is not configured in the target time domain range.

Optionally, the receiving module 702 is specifically configured to: and if the number of the symbols in the target time domain range is judged to be greater than or equal to a preset threshold value, receiving the reference signal at the second time domain position.

Optionally, the receiving module 702 is specifically configured to: receiving the data channel in a puncturing manner; or, receiving the data channel in a rate matching manner; or, if the time length required for sending the reference signal is judged to be greater than or equal to a first preset threshold value, the data channel is received in a punching mode; and if the time length required for sending the reference signal is judged to be less than the first preset threshold value, receiving the data channel in a rate matching mode.

Optionally, the indication information is used to indicate a transmission mode for transmitting the reference signal, where the transmission mode is puncturing or rate matching.

The communication device provided by the embodiment of the application aims at the condition that the local channel characteristic change is large in complete transmission. Through the indication information sent to the terminal by the base station sending module 701, the indication terminal determines a second time domain position for sending the reference signal according to the symbol position information of the received interference, the base station receiving module 702 receives the reference signal sent by the terminal at the second time domain position, and the demodulation module 703 demodulates the data channel according to the reference signal, so that the demodulation accuracy of the data channel in the symbol position interval of the received interference can be improved.

Please refer to fig. 8, which is a schematic diagram of an embodiment of a terminal in an embodiment of the present application.

The terminal 800, which may vary significantly depending on configuration or performance, may include one or more processors 801 and memory 805, with programs or data stored in the memory 805.

The memory 805 may be volatile memory or nonvolatile memory, among others. The processor 801 may be in communication with the memory 805 to execute a series of instructions in the memory 805 on the terminal 800.

The terminal 800 can also include one or more power supplies 802, one or more wired or wireless network interfaces 803, and one or more input-output interfaces 804.

The process executed by the processor 801 in the terminal 800 in this embodiment may refer to the method process described in the foregoing method embodiment, which is not described herein again.

Please refer to fig. 9, which is a diagram illustrating an embodiment of a base station in the embodiment of the present application.

The base station 900 may vary significantly depending on configuration or performance, and may include one or more processors 901 and memory 905, with programs or data stored in the memory 905.

The memory 905 may be volatile memory or nonvolatile memory, among others. The processor 901 may be in communication with the memory 905 and execute a series of instructions in the memory 905 at the base station 900.

Base station 900 may also include one or more power supplies 902, one or more wired or wireless network interfaces 903, and one or more input-output interfaces 904.

The process executed by the processor 901 in the base station 900 in this embodiment may refer to the method process described in the foregoing method embodiment, which is not described herein again.

An embodiment of the present application further provides a communication apparatus, including: a processor coupled with the memory; the memory is used for storing a computer program; the processor is configured to execute the computer program stored in the memory, so that the communication apparatus realizes the functions of the base station or the terminal in any of the foregoing method embodiments.

An embodiment of the present application further provides a chip, where the chip includes: at least one interface circuit, at least one processing circuit, the interface circuit and the processing circuit are coupled, and the processing circuit is configured to implement the functions of the terminal or the base station in any of the above method embodiments.

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

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

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 a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

In the embodiments of the present application, unless otherwise specified or conflicting with respect to logic, the terms and/or descriptions in different embodiments have consistency and may be mutually cited, and technical features in different embodiments may be combined to form a new embodiment according to their inherent logic relationship.

In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. In the description of the text of the present application, the character "/" generally indicates that the former and latter associated objects are in an "or" relationship; in the formula of the present application, the character "/" indicates that the preceding and following related objects are in a relationship of "division".

It is to be understood that the various numerical references referred to in the embodiments of the present application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of the present application. The sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of the processes should be determined by their functions and inherent logic.

Claims

1. A method of data transmission, comprising:

receiving indication information from a base station, wherein the indication information comprises information of a first time domain position;

determining a second time domain position according to the information of the first time domain position;

and sending a reference signal at the determined second time domain position, wherein the reference signal is used for demodulating a data channel.

2. The method of claim 1, wherein the first time domain position is a symbol position of a power change.

3. The method of claim 1 or 2, wherein the second time domain position is within a target time domain range, the target time domain range being a time domain range starting from the first time domain position.

4. The method of claim 3, wherein the target time domain range is a time domain range starting at a first symbol position of power variation to a previous symbol position of a second symbol position of power variation, wherein the second symbol position follows the first symbol position, and wherein the first symbol position and the second symbol position are one of the first time domain positions.

5. The method of claim 4, wherein the second symbol position is the symbol position that is the shortest in time interval from the first symbol position.

6. The method of claim 1, wherein the first time domain position is a symbol position of a state change of the other terminal signal, and the state change of the other terminal signal comprises a presence of the other terminal signal changing to an absence of the other terminal signal or a presence of the other terminal signal changing to a presence of the other terminal signal.

7. The method of claim 1 or 6, wherein the second time domain position is within a target time domain range, the target time domain range being a time domain range starting from the first time domain position.

8. The method of claim 7, wherein the target time domain range is a time domain range from a first symbol position of the state change of the other terminal signal to a previous symbol position from a start point to a second symbol position of the state change of the other terminal signal, wherein the second symbol position is subsequent to the first symbol position, and wherein the first symbol position and the second symbol position are one of the first time domain positions.

9. The method of claim 8, wherein the second symbol position is a symbol position that is a shortest time apart from the first symbol position.

10. The method according to any of claims 3 to 5 and 7 to 9, wherein said transmitting a reference signal at the determined second time domain position comprises:

and sending the reference signal at the determined second time domain position under the condition that the reference signal is not configured in the target time domain range.

11. The method according to any of claims 3 to 5 and 7 to 10, wherein said transmitting a reference signal at the determined second time domain position comprises:

and if the number of the symbols in the target time domain range is judged to be greater than or equal to a preset threshold value, sending a reference signal at the determined second time domain position.

12. The method of any one of claims 1 to 11, wherein the transmitting the reference signal at the determined second time domain position comprises:

transmitting the reference signal in a puncturing manner; or the like, or, alternatively,

transmitting the reference signal in a rate matching manner; or the like, or, alternatively,

if the time length required for sending the reference signal is judged to be greater than or equal to a first preset threshold value, the reference signal is sent in a punching mode;

and if the time length required for sending the reference signal is judged to be less than the first preset threshold value, sending the reference signal in a rate matching mode.

13. The method of any one of claims 1 to 11, wherein the transmitting the reference signal comprises:

and transmitting the reference signal according to a transmission mode indicated by the indication information, wherein the transmission mode is puncturing or rate matching.

14. A method of data transmission, comprising:

sending indication information to a terminal, wherein the indication information comprises information of a first time domain position, and the information of the first time domain position is used for determining a second time domain position;

receiving a reference signal located at the second time domain position from a terminal;

and demodulating a data channel according to the reference signal.

15. The method of claim 14, wherein the first time domain position information is a symbol position of a power change.

16. The method of claim 14 or 15, wherein the second temporal location is within a target temporal range; the target time domain is a time domain range with a position determined according to the first time domain position information as a starting point.

17. The method of claim 16, wherein the target time domain range is a time domain range starting at a first symbol position of power variation to a previous symbol position of a second symbol position of power variation, wherein the second symbol position follows the first symbol position, and wherein the first symbol position and the second symbol position are one of the first time domain positions.

18. The method of claim 17, wherein the second symbol position is a symbol position that is a shortest time apart from the first symbol position.

19. The method of claim 14, wherein the first time domain position is a symbol position of a state change of the other terminal signal, and the state change of the other terminal signal comprises a presence of the other terminal signal changing to a non-presence of the other terminal signal or a non-presence of the other terminal signal changing to a presence of the other terminal signal.

20. The method of claim 14 or 19, wherein the second time domain position is within a target time domain range, the target time domain range being a time domain range starting from the first time domain position.

21. The method of claim 20, wherein the target time domain range is a time domain range from a first symbol position of the state change of the other terminal signal to a previous symbol position from a start point to a second symbol position of the state change of the other terminal signal, wherein the second symbol position is subsequent to the first symbol position, and wherein the first symbol position and the second symbol position are one of the first time domain positions.

22. The method of claim 21, wherein the second symbol position is a symbol position that is a shortest time apart from the first symbol position.

23. The method according to any one of claims 16 to 18 and 20 to 22, wherein the receiving the reference signal at the second time domain location from the terminal specifically comprises:

and receiving the reference signal at the second time domain position under the condition that the reference signal is not configured in the target time domain range.

24. The method according to any one of claims 16 to 18 and 20 to 23, wherein the receiving a reference signal at the second time domain position specifically comprises:

and if the number of the symbols in the target time domain range is judged to be greater than or equal to a preset threshold value, receiving the reference signal at the second time domain position.

25. The method according to any of claims 14 to 24, wherein the receiving the reference signal at the second time domain location from the terminal comprises:

receiving the data channel in a puncturing manner; or the like, or, alternatively,

receiving the data channel in a rate-matched manner; or the like, or, alternatively,

if the time length required for sending the reference signal is judged to be greater than or equal to a first preset threshold value, receiving the data channel in a punching mode;

and if the time length required for sending the reference signal is judged to be less than the first preset threshold value, receiving the data channel in a rate matching mode.

26. The method according to any of claims 14 to 24, wherein the indication information is used to indicate a transmission mode for transmitting the reference signal, and the transmission mode is puncturing or rate matching.

27. A communication apparatus configured to perform the method of any one of claims 1 to 26.

28. A communications apparatus, comprising: a processor coupled with a memory;

a memory to store instructions;

a processor configured to execute the instructions to cause the communication device to perform the method of any of claims 1 to 26.

29. A computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 26.